Vanilla libssh2 1.10.0

Build with CMake.
Update VS solutions
2026-03-24 17:12:15 +01:00 · 2021-11-01 22:33:32 +01:00 · 2020-01-23 16:29:18 +01:00 · 2020-01-23 15:57:35 +01:00 · 2019-05-17 14:12:19 +02:00 · 2019-03-26 11:34:37 +01:00
243 changed files with 50006 additions and 18808 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -0,0 +1,117 @@
+# Copyright (c) 2014, 2015  Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+cmake_minimum_required(VERSION 2.8.11)
+
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+
+project(libssh2 C)
+set(PROJECT_URL "https://www.libssh2.org/")
+set(PROJECT_DESCRIPTION "The SSH library")
+
+if (CMAKE_VERSION VERSION_LESS "3.1")
+  if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    set (CMAKE_C_FLAGS "--std=gnu90 ${CMAKE_C_FLAGS}")
+  endif()
+else()
+  set (CMAKE_C_STANDARD 90)
+endif()
+
+option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
+
+# Parse version
+
+file(READ ${CMAKE_CURRENT_SOURCE_DIR}/include/libssh2.h _HEADER_CONTENTS)
+string(
+  REGEX REPLACE ".*#define LIBSSH2_VERSION[ \t]+\"([^\"]+)\".*" "\\1"
+  LIBSSH2_VERSION "${_HEADER_CONTENTS}")
+string(
+  REGEX REPLACE ".*#define LIBSSH2_VERSION_MAJOR[ \t]+([0-9]+).*" "\\1"
+  LIBSSH2_VERSION_MAJOR "${_HEADER_CONTENTS}")
+string(
+  REGEX REPLACE ".*#define LIBSSH2_VERSION_MINOR[ \t]+([0-9]+).*" "\\1"
+  LIBSSH2_VERSION_MINOR "${_HEADER_CONTENTS}")
+string(
+  REGEX REPLACE ".*#define LIBSSH2_VERSION_PATCH[ \t]+([0-9]+).*" "\\1"
+  LIBSSH2_VERSION_PATCH "${_HEADER_CONTENTS}")
+
+if(NOT LIBSSH2_VERSION OR
+   NOT LIBSSH2_VERSION_MAJOR MATCHES "^[0-9]+$" OR
+   NOT LIBSSH2_VERSION_MINOR MATCHES "^[0-9]+$" OR
+   NOT LIBSSH2_VERSION_PATCH MATCHES "^[0-9]+$")
+  message(
+    FATAL_ERROR
+    "Unable to parse version from"
+    "${CMAKE_CURRENT_SOURCE_DIR}/include/libssh2.h")
+endif()
+
+include(GNUInstallDirs)
+install(
+  FILES docs/AUTHORS COPYING docs/HACKING README RELEASE-NOTES NEWS
+  DESTINATION ${CMAKE_INSTALL_DOCDIR})
+
+include(max_warnings)
+include(FeatureSummary)
+
+add_subdirectory(src)
+
+option(BUILD_EXAMPLES "Build libssh2 examples" ON)
+if(BUILD_EXAMPLES)
+  add_subdirectory(example)
+endif()
+
+option(BUILD_TESTING "Build libssh2 test suite" ON)
+if(BUILD_TESTING)
+  enable_testing()
+  add_subdirectory(tests)
+endif()
+
+option(LINT "Check style while building" OFF)
+if(LINT)
+  add_custom_target(lint ALL
+    ./ci/checksrc.sh
+    WORKING_DIRECTORY ${libssh2_SOURCE_DIR})
+  add_dependencies(libssh2 lint)
+endif()
+
+add_subdirectory(docs)
+
+feature_summary(WHAT ALL)
+
+set(CPACK_PACKAGE_VERSION_MAJOR ${LIBSSH2_VERSION_MAJOR})
+set(CPACK_PACKAGE_VERSION_MINOR ${LIBSSH2_VERSION_MINOR})
+set(CPACK_PACKAGE_VERSION_PATCH ${LIBSSH2_VERSION_PATCH})
+set(CPACK_PACKAGE_VERSION ${LIBSSH2_VERSION})
+include(CPack)
--- a/4
+++ b/4
@@ -2,8 +2,10 @@
 * Copyright (c) 2005,2006 Mikhail Gusarov <dottedmag@dottedmag.net>
 * Copyright (c) 2006-2007 The Written Word, Inc.
 * Copyright (c) 2007 Eli Fant <elifantu@mail.ru>
- * Copyright (c) 2009-2014 Daniel Stenberg
+ * Copyright (c) 2009-2021 Daniel Stenberg
 * Copyright (C) 2008, 2009 Simon Josefsson
+ * Copyright (c) 2000 Markus Friedl
+ * Copyright (c) 2015 Microsoft Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms,
--- a/Makefile.OpenSSL.inc
+++ b/Makefile.OpenSSL.inc
@@ -1,2 +1,3 @@
 CRYPTO_CSOURCES = openssl.c
 CRYPTO_HHEADERS = openssl.h
+CRYPTO_LTLIBS = $(LTLIBSSL)
--- a/Makefile.WinCNG.inc
+++ b/Makefile.WinCNG.inc
@@ -1,2 +1,3 @@
 CRYPTO_CSOURCES = wincng.c
 CRYPTO_HHEADERS = wincng.h
+CRYPTO_LTLIBS = $(LTLIBBCRYPT) $(LTLIBCRYPT32)
--- a/Makefile.am
+++ b/Makefile.am
@@ -32,8 +32,20 @@ win32/libssh2_config.h win32/config.mk win32/rules.mk		\
 win32/Makefile.Watcom win32/libssh2.dsw win32/tests.dsp $(DSP)	\
 win32/msvcproj.head win32/msvcproj.foot win32/libssh2.rc

-EXTRA_DIST = $(WIN32FILES) buildconf $(NETWAREFILES) get_ver.awk \
- maketgz NMakefile RELEASE-NOTES libssh2.pc.in $(VMSFILES) config.rpath
+OS400FILES = os400/README400 os400/initscript.sh os400/make.sh		\
+os400/make-src.sh os400/make-rpg.sh os400/make-include.sh		\
+os400/os400sys.c os400/ccsid.c						\
+os400/libssh2_config.h os400/macros.h os400/libssh2_ccsid.h		\
+os400/include/alloca.h os400/include/sys/socket.h os400/include/stdio.h	\
+os400/libssh2rpg/libssh2.rpgle.in					\
+os400/libssh2rpg/libssh2_ccsid.rpgle.in					\
+os400/libssh2rpg/libssh2_publickey.rpgle				\
+os400/libssh2rpg/libssh2_sftp.rpgle					\
+Makefile.os400qc3.inc
+
+EXTRA_DIST = $(WIN32FILES) $(NETWAREFILES) get_ver.awk \
+ maketgz NMakefile RELEASE-NOTES libssh2.pc.in $(VMSFILES) config.rpath \
+ CMakeLists.txt cmake $(OS400FILES)

 ACLOCAL_AMFLAGS = -I m4

@@ -76,8 +88,8 @@ coverage: init-coverage build-coverage gen-coverage

 # DSP/VCPROJ generation adapted from libcurl
 # only OpenSSL and WinCNG are supported with this build system
-CRYPTO_CSOURCES = openssl.c wincng.c
-CRYPTO_HHEADERS = openssl.h wincng.h
+CRYPTO_CSOURCES = openssl.c wincng.c mbedtls.c
+CRYPTO_HHEADERS = openssl.h wincng.h mbedtls.h
 # Makefile.inc provides the CSOURCES and HHEADERS defines
 include Makefile.inc

@@ -107,7 +119,7 @@ $(DSP): win32/msvcproj.head win32/msvcproj.foot Makefile.am
 	for file in $$sorted_hdrs; do \
 		echo "# Begin Source File"; \
 		echo ""; \
-		if [ "$$file" == "libssh2_config.h" ]; \
+		if [ "$$file" = "libssh2_config.h" ]; \
 		then \
 			echo "SOURCE=.\\"$$file; \
 		else \
@@ -135,3 +147,8 @@ $(VCPROJ): win32/vc8proj.head win32/vc8proj.foot Makefile.am
 	done; \
 	cat $(srcdir)/vc8proj.foot) | \
 	awk '{printf("%s\r\n", gensub("\r", "", "g"))}' > $@ )
+
+checksrc:
+	perl src/checksrc.pl -i4 -m79 -ASIZEOFNOPAREN -ASNPRINTF -ACOPYRIGHT \
+		-AFOPENMODE -Wsrc/libssh2_config.h src/*.[ch] include/*.h example/*.c \
+		tests/*.[ch]
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,7 +1,7 @@
-# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# Makefile.in generated by automake 1.16.4 from Makefile.am.
 # @configure_input@

-# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.

 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -16,7 +16,17 @@


 VPATH = @srcdir@
-am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
 am__make_running_with_option = \
  case $${target_option-} in \
      ?) ;; \
@@ -80,12 +90,6 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
@BUILD_EXAMPLES_TRUE@am__append_1 = example
-DIST_COMMON = $(srcdir)/Makefile.inc $(srcdir)/Makefile.in \
-	$(srcdir)/Makefile.am $(top_srcdir)/configure \
-	$(am__configure_deps) $(srcdir)/libssh2.pc.in \
-	$(include_HEADERS) COPYING ChangeLog NEWS README compile \
-	config.guess config.rpath config.sub depcomp install-sh \
-	missing ltmain.sh
 subdir = .
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/autobuild.m4 \
@@ -96,11 +100,12 @@ am__aclocal_m4_deps = $(top_srcdir)/m4/autobuild.m4 \
 	$(top_srcdir)/acinclude.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(top_srcdir)/configure \
+	$(am__configure_deps) $(include_HEADERS) $(am__DIST_COMMON)
 am__CONFIG_DISTCLEAN_FILES = config.status config.cache config.log \
 configure.lineno config.status.lineno
 mkinstalldirs = $(install_sh) -d
-CONFIG_HEADER = $(top_builddir)/src/libssh2_config.h \
-	$(top_builddir)/example/libssh2_config.h
+CONFIG_HEADER = $(top_builddir)/src/libssh2_config.h
 CONFIG_CLEAN_FILES = libssh2.pc
 CONFIG_CLEAN_VPATH_FILES =
 AM_V_P = $(am__v_P_@AM_V@)
@@ -168,7 +173,7 @@ am__recursive_targets = \
  $(RECURSIVE_CLEAN_TARGETS) \
  $(am__extra_recursive_targets)
 AM_RECURSIVE_TARGETS = $(am__recursive_targets:-recursive=) TAGS CTAGS \
-	cscope distdir dist dist-all distcheck
+	cscope distdir distdir-am dist dist-all distcheck
 am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
 # Read a list of newline-separated strings from the standard input,
 # and print each of them once, without duplicates.  Input order is
@@ -186,10 +191,11 @@ am__define_uniq_tagged_files = \
  unique=`for i in $$list; do \
    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
  done | $(am__uniquify_input)`
-ETAGS = etags
-CTAGS = ctags
-CSCOPE = cscope
 DIST_SUBDIRS = src tests docs example
+am__DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.inc \
+	$(srcdir)/libssh2.pc.in COPYING ChangeLog NEWS README compile \
+	config.guess config.rpath config.sub depcomp install-sh \
+	ltmain.sh missing
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 distdir = $(PACKAGE)-$(VERSION)
 top_distdir = $(distdir)
@@ -228,6 +234,8 @@ am__relativize = \
 DIST_ARCHIVES = $(distdir).tar.gz
 GZIP_ENV = --best
 DIST_TARGETS = dist-gzip
+# Exists only to be overridden by the user if desired.
+AM_DISTCHECK_DVI_TARGET = dvi
 distuninstallcheck_listfiles = find . -type f -print
 am__distuninstallcheck_listfiles = $(distuninstallcheck_listfiles) \
  | sed 's|^\./|$(prefix)/|' | grep -v '$(infodir)/dir$$'
@@ -247,6 +255,12 @@ CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CXX = @CXX@
+CXXCPP = @CXXCPP@
+CXXDEPMODE = @CXXDEPMODE@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
@@ -257,12 +271,14 @@ ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
+ETAGS = @ETAGS@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
 HAVE_LIBBCRYPT = @HAVE_LIBBCRYPT@
 HAVE_LIBCRYPT32 = @HAVE_LIBCRYPT32@
 HAVE_LIBGCRYPT = @HAVE_LIBGCRYPT@
+HAVE_LIBMBEDCRYPTO = @HAVE_LIBMBEDCRYPTO@
 HAVE_LIBSSL = @HAVE_LIBSSL@
 HAVE_LIBZ = @HAVE_LIBZ@
 INSTALL = @INSTALL@
@@ -278,6 +294,8 @@ LIBCRYPT32 = @LIBCRYPT32@
 LIBCRYPT32_PREFIX = @LIBCRYPT32_PREFIX@
 LIBGCRYPT = @LIBGCRYPT@
 LIBGCRYPT_PREFIX = @LIBGCRYPT_PREFIX@
+LIBMBEDCRYPTO = @LIBMBEDCRYPTO@
+LIBMBEDCRYPTO_PREFIX = @LIBMBEDCRYPTO_PREFIX@
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LIBSREQUIRED = @LIBSREQUIRED@
@@ -287,14 +305,17 @@ LIBSSL_PREFIX = @LIBSSL_PREFIX@
 LIBTOOL = @LIBTOOL@
 LIBZ = @LIBZ@
 LIBZ_PREFIX = @LIBZ_PREFIX@
+LIB_FUZZING_ENGINE = @LIB_FUZZING_ENGINE@
 LIPO = @LIPO@
 LN_S = @LN_S@
 LTLIBBCRYPT = @LTLIBBCRYPT@
 LTLIBCRYPT32 = @LTLIBCRYPT32@
 LTLIBGCRYPT = @LTLIBGCRYPT@
+LTLIBMBEDCRYPTO = @LTLIBMBEDCRYPTO@
 LTLIBOBJS = @LTLIBOBJS@
 LTLIBSSL = @LTLIBSSL@
 LTLIBZ = @LTLIBZ@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
 MAINT = @MAINT@
 MAKEINFO = @MAKEINFO@
 MANIFEST_TOOL = @MANIFEST_TOOL@
@@ -326,6 +347,7 @@ abs_top_builddir = @abs_top_builddir@
 abs_top_srcdir = @abs_top_srcdir@
 ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
+ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
@@ -364,6 +386,7 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@@ -398,21 +421,34 @@ win32/libssh2_config.h win32/config.mk win32/rules.mk		\
 win32/Makefile.Watcom win32/libssh2.dsw win32/tests.dsp $(DSP)	\
 win32/msvcproj.head win32/msvcproj.foot win32/libssh2.rc

-EXTRA_DIST = $(WIN32FILES) buildconf $(NETWAREFILES) get_ver.awk \
- maketgz NMakefile RELEASE-NOTES libssh2.pc.in $(VMSFILES) config.rpath
+OS400FILES = os400/README400 os400/initscript.sh os400/make.sh		\
+os400/make-src.sh os400/make-rpg.sh os400/make-include.sh		\
+os400/os400sys.c os400/ccsid.c						\
+os400/libssh2_config.h os400/macros.h os400/libssh2_ccsid.h		\
+os400/include/alloca.h os400/include/sys/socket.h os400/include/stdio.h	\
+os400/libssh2rpg/libssh2.rpgle.in					\
+os400/libssh2rpg/libssh2_ccsid.rpgle.in					\
+os400/libssh2rpg/libssh2_publickey.rpgle				\
+os400/libssh2rpg/libssh2_sftp.rpgle					\
+Makefile.os400qc3.inc
+
+EXTRA_DIST = $(WIN32FILES) $(NETWAREFILES) get_ver.awk \
+ maketgz NMakefile RELEASE-NOTES libssh2.pc.in $(VMSFILES) config.rpath \
+ CMakeLists.txt cmake $(OS400FILES)

 ACLOCAL_AMFLAGS = -I m4

 # DSP/VCPROJ generation adapted from libcurl
 # only OpenSSL and WinCNG are supported with this build system
-CRYPTO_CSOURCES = openssl.c wincng.c
-CRYPTO_HHEADERS = openssl.h wincng.h
+CRYPTO_CSOURCES = openssl.c wincng.c mbedtls.c
+CRYPTO_HHEADERS = openssl.h wincng.h mbedtls.h
 CSOURCES = channel.c comp.c crypt.c hostkey.c kex.c mac.c misc.c \
 packet.c publickey.c scp.c session.c sftp.c userauth.c transport.c \
- version.c knownhost.c agent.c $(CRYPTO_CSOURCES) pem.c keepalive.c global.c
+ version.c knownhost.c agent.c $(CRYPTO_CSOURCES) pem.c keepalive.c global.c \
+ blowfish.c bcrypt_pbkdf.c agent_win.c

 HHEADERS = libssh2_priv.h $(CRYPTO_HHEADERS) transport.h channel.h comp.h \
- mac.h misc.h packet.h userauth.h session.h sftp.h crypto.h
+ mac.h misc.h packet.h userauth.h session.h sftp.h crypto.h blf.h agent.h

 # Makefile.inc provides the CSOURCES and HHEADERS defines
 WIN32SOURCES = $(CSOURCES)
@@ -435,17 +471,16 @@ $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(srcdir)/Ma
 	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign Makefile'; \
 	$(am__cd) $(top_srcdir) && \
 	  $(AUTOMAKE) --foreign Makefile
-.PRECIOUS: Makefile
 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	@case '$?' in \
 	  *config.status*) \
 	    echo ' $(SHELL) ./config.status'; \
 	    $(SHELL) ./config.status;; \
 	  *) \
-	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__depfiles_maybe)'; \
-	    cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__depfiles_maybe);; \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $@ $(am__maybe_remake_depfiles);; \
 	esac;
-$(srcdir)/Makefile.inc:
+$(srcdir)/Makefile.inc $(am__empty):

 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
 	$(SHELL) ./config.status --recheck
@@ -614,8 +649,10 @@ cscopelist-am: $(am__tagged_files)
 distclean-tags:
 	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
 	-rm -f cscope.out cscope.in.out cscope.po.out cscope.files
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am

-distdir: $(DISTFILES)
+distdir-am: $(DISTFILES)
 	$(am__remove_distdir)
 	test -d "$(distdir)" || mkdir "$(distdir)"
 	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
@@ -683,7 +720,7 @@ distdir: $(DISTFILES)
 	  ! -type d ! -perm -444 -exec $(install_sh) -c -m a+r {} {} \; \
 	|| chmod -R a+r "$(distdir)"
 dist-gzip: distdir
-	tardir=$(distdir) && $(am__tar) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).tar.gz
+	tardir=$(distdir) && $(am__tar) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).tar.gz
 	$(am__post_remove_distdir)

 dist-bzip2: distdir
@@ -698,18 +735,22 @@ dist-xz: distdir
 	tardir=$(distdir) && $(am__tar) | XZ_OPT=$${XZ_OPT--e} xz -c >$(distdir).tar.xz
 	$(am__post_remove_distdir)

+dist-zstd: distdir
+	tardir=$(distdir) && $(am__tar) | zstd -c $${ZSTD_CLEVEL-$${ZSTD_OPT--19}} >$(distdir).tar.zst
+	$(am__post_remove_distdir)
+
 dist-tarZ: distdir
-	@echo WARNING: "Support for shar distribution archives is" \
-	               "deprecated." >&2
+	@echo WARNING: "Support for distribution archives compressed with" \
+		       "legacy program 'compress' is deprecated." >&2
 	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
 	tardir=$(distdir) && $(am__tar) | compress -c >$(distdir).tar.Z
 	$(am__post_remove_distdir)

 dist-shar: distdir
-	@echo WARNING: "Support for distribution archives compressed with" \
-		       "legacy program 'compress' is deprecated." >&2
+	@echo WARNING: "Support for shar distribution archives is" \
+	               "deprecated." >&2
 	@echo WARNING: "It will be removed altogether in Automake 2.0" >&2
-	shar $(distdir) | GZIP=$(GZIP_ENV) gzip -c >$(distdir).shar.gz
+	shar $(distdir) | eval GZIP= gzip $(GZIP_ENV) -c >$(distdir).shar.gz
 	$(am__post_remove_distdir)

 dist-zip: distdir
@@ -727,7 +768,7 @@ dist dist-all:
 distcheck: dist
 	case '$(DIST_ARCHIVES)' in \
 	*.tar.gz*) \
-	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).tar.gz | $(am__untar) ;;\
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).tar.gz | $(am__untar) ;;\
 	*.tar.bz2*) \
 	  bzip2 -dc $(distdir).tar.bz2 | $(am__untar) ;;\
 	*.tar.lz*) \
@@ -737,25 +778,27 @@ distcheck: dist
 	*.tar.Z*) \
 	  uncompress -c $(distdir).tar.Z | $(am__untar) ;;\
 	*.shar.gz*) \
-	  GZIP=$(GZIP_ENV) gzip -dc $(distdir).shar.gz | unshar ;;\
+	  eval GZIP= gzip $(GZIP_ENV) -dc $(distdir).shar.gz | unshar ;;\
 	*.zip*) \
 	  unzip $(distdir).zip ;;\
+	*.tar.zst*) \
+	  zstd -dc $(distdir).tar.zst | $(am__untar) ;;\
 	esac
 	chmod -R a-w $(distdir)
 	chmod u+w $(distdir)
-	mkdir $(distdir)/_build $(distdir)/_inst
+	mkdir $(distdir)/_build $(distdir)/_build/sub $(distdir)/_inst
 	chmod a-w $(distdir)
 	test -d $(distdir)/_build || exit 0; \
 	dc_install_base=`$(am__cd) $(distdir)/_inst && pwd | sed -e 's,^[^:\\/]:[\\/],/,'` \
 	  && dc_destdir="$${TMPDIR-/tmp}/am-dc-$$$$/" \
 	  && am__cwd=`pwd` \
-	  && $(am__cd) $(distdir)/_build \
-	  && ../configure \
+	  && $(am__cd) $(distdir)/_build/sub \
+	  && ../../configure \
 	    $(AM_DISTCHECK_CONFIGURE_FLAGS) \
 	    $(DISTCHECK_CONFIGURE_FLAGS) \
-	    --srcdir=.. --prefix="$$dc_install_base" \
+	    --srcdir=../.. --prefix="$$dc_install_base" \
 	  && $(MAKE) $(AM_MAKEFLAGS) \
-	  && $(MAKE) $(AM_MAKEFLAGS) dvi \
+	  && $(MAKE) $(AM_MAKEFLAGS) $(AM_DISTCHECK_DVI_TARGET) \
 	  && $(MAKE) $(AM_MAKEFLAGS) check \
 	  && $(MAKE) $(AM_MAKEFLAGS) install \
 	  && $(MAKE) $(AM_MAKEFLAGS) installcheck \
@@ -921,7 +964,7 @@ uninstall-am: uninstall-includeHEADERS uninstall-pkgconfigDATA
 	am--refresh check check-am clean clean-cscope clean-generic \
 	clean-libtool cscope cscopelist-am ctags ctags-am dist \
 	dist-all dist-bzip2 dist-gzip dist-hook dist-lzip dist-shar \
-	dist-tarZ dist-xz dist-zip distcheck distclean \
+	dist-tarZ dist-xz dist-zip dist-zstd distcheck distclean \
 	distclean-generic distclean-libtool distclean-tags \
 	distcleancheck distdir distuninstallcheck dvi dvi-am html \
 	html-am info info-am install install-am install-data \
@@ -935,6 +978,8 @@ uninstall-am: uninstall-includeHEADERS uninstall-pkgconfigDATA
 	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
 	uninstall-am uninstall-includeHEADERS uninstall-pkgconfigDATA

+.PRECIOUS: Makefile
+

 .PHONY: ChangeLog
 ChangeLog:
@@ -995,7 +1040,7 @@ $(DSP): win32/msvcproj.head win32/msvcproj.foot Makefile.am
 	for file in $$sorted_hdrs; do \
 		echo "# Begin Source File"; \
 		echo ""; \
-		if [ "$$file" == "libssh2_config.h" ]; \
+		if [ "$$file" = "libssh2_config.h" ]; \
 		then \
 			echo "SOURCE=.\\"$$file; \
 		else \
@@ -1024,6 +1069,11 @@ $(VCPROJ): win32/vc8proj.head win32/vc8proj.foot Makefile.am
 	cat $(srcdir)/vc8proj.foot) | \
 	awk '{printf("%s\r\n", gensub("\r", "", "g"))}' > $@ )

+checksrc:
+	perl src/checksrc.pl -i4 -m79 -ASIZEOFNOPAREN -ASNPRINTF -ACOPYRIGHT \
+		-AFOPENMODE -Wsrc/libssh2_config.h src/*.[ch] include/*.h example/*.c \
+		tests/*.[ch]
+
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -1,6 +1,7 @@
 CSOURCES = channel.c comp.c crypt.c hostkey.c kex.c mac.c misc.c \
 packet.c publickey.c scp.c session.c sftp.c userauth.c transport.c \
- version.c knownhost.c agent.c $(CRYPTO_CSOURCES) pem.c keepalive.c global.c
+ version.c knownhost.c agent.c $(CRYPTO_CSOURCES) pem.c keepalive.c global.c \
+ blowfish.c bcrypt_pbkdf.c agent_win.c

 HHEADERS = libssh2_priv.h $(CRYPTO_HHEADERS) transport.h channel.h comp.h \
- mac.h misc.h packet.h userauth.h session.h sftp.h crypto.h
+ mac.h misc.h packet.h userauth.h session.h sftp.h crypto.h blf.h agent.h
--- a/Makefile.libgcrypt.inc
+++ b/Makefile.libgcrypt.inc
@@ -1,2 +1,3 @@
 CRYPTO_CSOURCES = libgcrypt.c
 CRYPTO_HHEADERS = libgcrypt.h
+CRYPTO_LTLIBS = $(LTLIBGCRYPT)
--- a/Makefile.mbedTLS.inc
+++ b/Makefile.mbedTLS.inc
@@ -0,0 +1,3 @@
+CRYPTO_CSOURCES = mbedtls.c
+CRYPTO_HHEADERS = mbedtls.h
+CRYPTO_LTLIBS = $(LTLIBMBEDCRYPTO)
--- a/Makefile.os400qc3.inc
+++ b/Makefile.os400qc3.inc
@@ -0,0 +1,2 @@
+CRYPTO_CSOURCES = os400qc3.c
+CRYPTO_HHEADERS = os400qc3.h
--- a/5189
+++ b/5189
--- a/4
+++ b/4
@@ -4,9 +4,9 @@ libssh2 - SSH2 library
 libssh2 is a library implementing the SSH2 protocol, available under
 the revised BSD license.

-Web site: http://www.libssh2.org/
+Web site: https://www.libssh2.org/

-Mailing list: http://cool.haxx.se/mailman/listinfo/libssh2-devel
+Mailing list: https://cool.haxx.se/mailman/listinfo/libssh2-devel

 License: see COPYING

--- a/README.md
+++ b/README.md
@@ -1,12 +0,0 @@
-# libssh2
-
-libssh2 is a client-side C library implementing the SSH2 protocol.
-
-# Building for PHP
-
-libssh2 depends on openssl and zlib. To build follow these steps:
-
-* create a directory named "deps" at the level of the libssh2 source dir and put the dependencies there
-* build libssh2
- * use win32/libssh2.vcproj to build with VS2008
- * use win32/libssh2.vc11.sln to build with VS2012
--- a/93
+++ b/93
@@ -1,45 +1,62 @@
-libssh2 1.6.0
+libssh2 1.10

-This release includes the following changes:
+This release includes the following enhancements and bugfixes:

- o Added CMake build system
- o Added libssh2_userauth_publickey_frommemory()
+ o adds agent forwarding support
+ o adds OpenSSH Agent support on Windows
+ o adds ECDSA key support using the Mbed TLS backend
+ o adds ECDSA cert authentication
+ o adds diffie-hellman-group14-sha256, diffie-hellman-group16-sha512,
+   diffie-hellman-group18-sha512 key exchanges
+ o adds support for PKIX key reading when using ed25519 with OpenSSL
+ o adds support for EWOULDBLOCK on VMS systems
+ o adds support for building with OpenSSL 3
+ o adds support for using FIPS mode in OpenSSL
+ o adds debug symbols when building with MSVC
+ o adds support for building on the 3DS
+ o adds unicode build support on Windows
+ o restores os400 building
+ o increases min, max and opt Diffie Hellman group values
+ o improves portiablity of the make file
+ o improves timeout behavior with 2FA keyboard auth
+ o various improvements to the Wincng backend
+ o fixes reading parital packet replies when using an agent
+ o fixes Diffie Hellman key exchange on Windows 1903+ builds
+ o fixes building tests with older versions of OpenSSL
+ o fixes possible multiple definition warnings
+ o fixes potential cast issues _libssh2_ecdsa_key_get_curve_type()
+ o fixes potential use after free if libssh2_init() is called twice
+ o improved linking when using Mbed TLS
+ o fixes call to libssh2_crypto_exit() if crypto hasn't been initialized
+ o fixes crash when loading public keys with no id
+ o fixes possible out of bounds read when exchanging keys
+ o fixes possible out of bounds read when reading packets
+ o fixes possible out of bounds read when opening an X11 connection
+ o fixes possible out of bounds read when ecdh host keys
+ o fixes possible hang when trying to read a disconnected socket
+ o fixes a crash when using the delayed compression option
+ o fixes read error with large known host entries
+ o fixes various warnings
+ o fixes various small memory leaks
+ o improved error handling, various detailed errors will now be reported
+ o builds are now using OSS-Fuzz
+ o builds now use autoreconf instead of a custom build script
+ o cmake now respects install directory
+ o improved CI backend
+ o updated HACKING-CRYPTO documentation
+ o use markdown file extensions
+ o improved unit tests

-This release includes the following bugfixes:
-
- o wait_socket: wrong use of difftime() [1]
- o userauth: Fixed prompt text no longer being copied to the prompts struct
- o mingw build: allow to pass custom CFLAGS
- o Let mansyntax.sh work regardless of where it is called from
- o Init HMAC_CTX before using it
- o direct_tcpip: Fixed channel write
- o WinCNG: fixed backend breakage
- o OpenSSL: caused by introducing libssh2_hmac_ctx_init
- o userauth.c: fix possible dereferences of a null pointer
- o wincng: Added explicit clear memory feature to WinCNG backend
- o openssl.c: fix possible segfault in case EVP_DigestInit fails
- o wincng: fix return code of libssh2_md5_init()
- o kex: do not ignore failure of libssh2_sha1_init()
- o scp: fix that scp_send may transmit not initialised memory [3]
- o scp.c: improved command length calculation
- o nonblocking examples: fix warning about unused tvdiff on Mac OS X
- o configure: make clear-memory default but WARN if backend unsupported
- o OpenSSL: Enable use of OpenSSL that doesn't have DSA
- o OpenSSL: Use correct no-blowfish #define
- o kex: fix libgcrypt memory leaks of bignum [2]
- o libssh2_channel_open: more detailed error message
- o wincng: fixed memleak in (block) cipher destructor
- 
- 
 This release would not have looked like this without help, code, reports and
 advice from friends like these:

-  Alexander Lamaison, Daniel Stenberg, David Calavera, Hannes Domani,
-  Jakob Egger, Joe Turpin, Marc Hoersken, Viktor Szakáts, Will Cosgrove,
-  (9 contributors)
- 
-        Thanks! (and sorry if I forgot to mention someone)
+  katzer, Orgad Shaneh, mark-i-m, Zenju, axjowa, Thilo Schulz,
+  Etienne Samson, hlefebvre, seba30, Panos, jethrogb, Fabrice Fontaine,
+  Will Cosgrove, Daniel Stenberg, Michael Buckley, Wallace Souza Silva,
+  Romain-Geissler-1A, meierha, Tseng Jun, Thomas Klausner, Brendan Shanks,
+  Harry Sintonen, monnerat, Koutheir Attouchi, Marc Hörsken, yann-morin-1998,
+  Wez Furlong, TDi-jonesds, David Benjamin, Max Dymond, Igor Klevanets,
+  Viktor Szakats, Laurent Stacul, Mstrodl, Gabriel Smith, MarcT512,
+  Paul Capron, teottin, Tor Erik Ottinsen, Brian Inglis

- [1] = https://github.com/bagder/libssh2/issues/1
- [2] = https://trac.libssh2.org/ticket/168
- [3] = https://trac.libssh2.org/ticket/244
+  (40 contributors)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -382,3 +382,131 @@ AC_DEFUN([CURL_CONFIGURE_REENTRANT], [
  #
 ])

+dnl LIBSSH2_LIB_HAVE_LINKFLAGS
+dnl --------------------------
+dnl Wrapper around AC_LIB_HAVE_LINKFLAGS to also check $prefix/lib, if set.
+dnl
+dnl autoconf only checks $prefix/lib64 if gcc -print-search-dirs output
+dnl includes a directory named lib64. So, to find libraries in $prefix/lib
+dnl we append -L$prefix/lib to LDFLAGS before checking.
+dnl
+dnl For conveniece, $4 is expanded if [lib]$1 is found.
+
+AC_DEFUN([LIBSSH2_LIB_HAVE_LINKFLAGS], [
+  libssh2_save_CPPFLAGS="$CPPFLAGS"
+  libssh2_save_LDFLAGS="$LDFLAGS"
+
+  if test "${with_lib$1_prefix+set}" = set; then
+    CPPFLAGS="$CPPFLAGS${CPPFLAGS:+ }-I${with_lib$1_prefix}/include"
+    LDFLAGS="$LDFLAGS${LDFLAGS:+ }-L${with_lib$1_prefix}/lib"
+  fi
+
+  AC_LIB_HAVE_LINKFLAGS([$1], [$2], [$3])
+
+  LDFLAGS="$libssh2_save_LDFLAGS"
+
+  if test "$ac_cv_lib$1" = "yes"; then :
+    $4
+  else
+    CPPFLAGS="$libssh2_save_CPPFLAGS"
+  fi
+])
+
+AC_DEFUN([LIBSSH2_CHECK_CRYPTO], [
+if test "$use_crypto" = "auto" && test "$found_crypto" = "none" || test "$use_crypto" = "$1"; then
+m4_case([$1],
+[openssl], [
+  LIBSSH2_LIB_HAVE_LINKFLAGS([ssl], [crypto], [#include <openssl/ssl.h>], [
+    AC_DEFINE(LIBSSH2_OPENSSL, 1, [Use $1])
+    LIBSREQUIRED="$LIBSREQUIRED${LIBSREQUIRED:+ }libssl libcrypto"
+
+    # Not all OpenSSL have AES-CTR functions.
+    libssh2_save_LIBS="$LIBS"
+    LIBS="$LIBS $LIBSSL"
+    AC_CHECK_FUNCS(EVP_aes_128_ctr)
+    LIBS="$libssh2_save_LIBS"
+
+    found_crypto="$1"
+    found_crypto_str="OpenSSL (AES-CTR: ${ac_cv_func_EVP_aes_128_ctr:-N/A})"
+  ])
+],
+
+[libgcrypt], [
+  LIBSSH2_LIB_HAVE_LINKFLAGS([gcrypt], [], [#include <gcrypt.h>], [
+    AC_DEFINE(LIBSSH2_LIBGCRYPT, 1, [Use $1])
+    found_crypto="$1"
+  ])
+],
+
+[mbedtls], [
+  LIBSSH2_LIB_HAVE_LINKFLAGS([mbedcrypto], [], [#include <mbedtls/version.h>], [
+    AC_DEFINE(LIBSSH2_MBEDTLS, 1, [Use $1])
+    LIBS="$LIBS -lmbedcrypto"
+    found_crypto="$1"
+    support_clear_memory=yes
+  ])
+],
+
+[wincng], [
+  # Look for Windows Cryptography API: Next Generation
+
+  AC_CHECK_HEADERS([ntdef.h ntstatus.h], [], [], [#include <windows.h>])
+  AC_CHECK_DECLS([SecureZeroMemory], [], [], [#include <windows.h>])
+
+  LIBSSH2_LIB_HAVE_LINKFLAGS([crypt32], [], [
+    #include <windows.h>
+    #include <wincrypt.h>
+  ])
+  LIBSSH2_LIB_HAVE_LINKFLAGS([bcrypt], [], [
+    #include <windows.h>
+    #include <bcrypt.h>
+  ], [
+    AC_DEFINE(LIBSSH2_WINCNG, 1, [Use $1])
+    found_crypto="$1"
+    found_crypto_str="Windows Cryptography API: Next Generation"
+    support_clear_memory="$ac_cv_have_decl_SecureZeroMemory"
+  ])
+],
+)
+  test "$found_crypto" = "none" &&
+    crypto_errors="${crypto_errors}No $1 crypto library found!
+"
+fi
+])
+
+
+dnl LIBSSH2_CHECK_OPTION_WERROR
+dnl -------------------------------------------------
+dnl Verify if configure has been invoked with option
+dnl --enable-werror or --disable-werror, and set
+dnl shell variable want_werror as appropriate.
+
+AC_DEFUN([LIBSSH2_CHECK_OPTION_WERROR], [
+  AC_BEFORE([$0],[LIBSSH2_CHECK_COMPILER])dnl
+  AC_MSG_CHECKING([whether to enable compiler warnings as errors])
+  OPT_COMPILER_WERROR="default"
+  AC_ARG_ENABLE(werror,
+AC_HELP_STRING([--enable-werror],[Enable compiler warnings as errors])
+AC_HELP_STRING([--disable-werror],[Disable compiler warnings as errors]),
+  OPT_COMPILER_WERROR=$enableval)
+  case "$OPT_COMPILER_WERROR" in
+    no)
+      dnl --disable-werror option used
+      want_werror="no"
+      ;;
+    default)
+      dnl configure option not specified
+      want_werror="no"
+      ;;
+    *)
+      dnl --enable-werror option used
+      want_werror="yes"
+      ;;
+  esac
+  AC_MSG_RESULT([$want_werror])
+
+  if test X"$want_werror" = Xyes; then
+    CFLAGS="$CFLAGS -Werror"
+  fi
+])
+
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,6 +1,6 @@
-# generated automatically by aclocal 1.14.1 -*- Autoconf -*-
+# generated automatically by aclocal 1.16.4 -*- Autoconf -*-

-# Copyright (C) 1996-2013 Free Software Foundation, Inc.
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.

 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -14,13 +14,13 @@
 m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
 m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
-m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],,
-[m4_warning([this file was generated for autoconf 2.69.
+m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.71],,
+[m4_warning([this file was generated for autoconf 2.71.
 You have another version of autoconf.  It may work, but is not guaranteed to.
 If you have problems, you may need to regenerate the build system entirely.
 To do so, use the procedure documented by the package, typically 'autoreconf'.])])

-# Copyright (C) 2002-2013 Free Software Foundation, Inc.
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -32,10 +32,10 @@ To do so, use the procedure documented by the package, typically 'autoreconf'.])
 # generated from the m4 files accompanying Automake X.Y.
 # (This private macro should not be called outside this file.)
 AC_DEFUN([AM_AUTOMAKE_VERSION],
-[am__api_version='1.14'
+[am__api_version='1.16'
 dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
 dnl require some minimum version.  Point them to the right macro.
-m4_if([$1], [1.14.1], [],
+m4_if([$1], [1.16.4], [],
      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
 ])

@@ -51,14 +51,14 @@ m4_define([_AM_AUTOCONF_VERSION], [])
 # Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
 # This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
-[AM_AUTOMAKE_VERSION([1.14.1])dnl
+[AM_AUTOMAKE_VERSION([1.16.4])dnl
 m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
 _AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])

 # AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -110,7 +110,7 @@ am_aux_dir=`cd "$ac_aux_dir" && pwd`

 # AM_CONDITIONAL                                            -*- Autoconf -*-

-# Copyright (C) 1997-2013 Free Software Foundation, Inc.
+# Copyright (C) 1997-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -141,7 +141,7 @@ AC_CONFIG_COMMANDS_PRE(
 Usually this means the macro was only invoked conditionally.]])
 fi])])

-# Copyright (C) 1999-2013 Free Software Foundation, Inc.
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -332,13 +332,12 @@ _AM_SUBST_NOTMAKE([am__nodep])dnl

 # Generate code to set up dependency tracking.              -*- Autoconf -*-

-# Copyright (C) 1999-2013 Free Software Foundation, Inc.
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.

-
 # _AM_OUTPUT_DEPENDENCY_COMMANDS
 # ------------------------------
 AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
@@ -346,49 +345,43 @@ AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
  # Older Autoconf quotes --file arguments for eval, but not when files
  # are listed without --file.  Let's play safe and only enable the eval
  # if we detect the quoting.
-  case $CONFIG_FILES in
-  *\'*) eval set x "$CONFIG_FILES" ;;
-  *)   set x $CONFIG_FILES ;;
-  esac
+  # TODO: see whether this extra hack can be removed once we start
+  # requiring Autoconf 2.70 or later.
+  AS_CASE([$CONFIG_FILES],
+          [*\'*], [eval set x "$CONFIG_FILES"],
+          [*], [set x $CONFIG_FILES])
  shift
-  for mf
+  # Used to flag and report bootstrapping failures.
+  am_rc=0
+  for am_mf
  do
    # Strip MF so we end up with the name of the file.
-    mf=`echo "$mf" | sed -e 's/:.*$//'`
-    # Check whether this is an Automake generated Makefile or not.
-    # We used to match only the files named 'Makefile.in', but
-    # some people rename them; so instead we look at the file content.
-    # Grep'ing the first line is not enough: some people post-process
-    # each Makefile.in and add a new line on top of each file to say so.
-    # Grep'ing the whole file is not good either: AIX grep has a line
+    am_mf=`AS_ECHO(["$am_mf"]) | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile which includes
+    # dependency-tracking related rules and includes.
+    # Grep'ing the whole file directly is not great: AIX grep has a line
    # limit of 2048, but all sed's we know have understand at least 4000.
-    if sed -n 's,^#.*generated by automake.*,X,p' "$mf" | grep X >/dev/null 2>&1; then
-      dirpart=`AS_DIRNAME("$mf")`
-    else
-      continue
-    fi
-    # Extract the definition of DEPDIR, am__include, and am__quote
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-    am__include=`sed -n 's/^am__include = //p' < "$mf"`
-    test -z "$am__include" && continue
-    am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
-    # Find all dependency output files, they are included files with
-    # $(DEPDIR) in their names.  We invoke sed twice because it is the
-    # simplest approach to changing $(DEPDIR) to its actual value in the
-    # expansion.
-    for file in `sed -n "
-      s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \
-	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g'`; do
-      # Make sure the directory exists.
-      test -f "$dirpart/$file" && continue
-      fdir=`AS_DIRNAME(["$file"])`
-      AS_MKDIR_P([$dirpart/$fdir])
-      # echo "creating $dirpart/$file"
-      echo '# dummy' > "$dirpart/$file"
-    done
+    sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
+      || continue
+    am_dirpart=`AS_DIRNAME(["$am_mf"])`
+    am_filepart=`AS_BASENAME(["$am_mf"])`
+    AM_RUN_LOG([cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles]) || am_rc=$?
  done
+  if test $am_rc -ne 0; then
+    AC_MSG_FAILURE([Something went wrong bootstrapping makefile fragments
+    for automatic dependency tracking.  If GNU make was not used, consider
+    re-running the configure script with MAKE="gmake" (or whatever is
+    necessary).  You can also try re-running configure with the
+    '--disable-dependency-tracking' option to at least be able to build
+    the package (albeit without support for automatic dependency tracking).])
+  fi
+  AS_UNSET([am_dirpart])
+  AS_UNSET([am_filepart])
+  AS_UNSET([am_mf])
+  AS_UNSET([am_rc])
+  rm -f conftest-deps.mk
 }
 ])# _AM_OUTPUT_DEPENDENCY_COMMANDS

@@ -397,18 +390,17 @@ AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
 # -----------------------------
 # This macro should only be invoked once -- use via AC_REQUIRE.
 #
-# This code is only required when automatic dependency tracking
-# is enabled.  FIXME.  This creates each '.P' file that we will
-# need in order to bootstrap the dependency handling code.
+# This code is only required when automatic dependency tracking is enabled.
+# This creates each '.Po' and '.Plo' makefile fragment that we'll need in
+# order to bootstrap the dependency handling code.
 AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
 [AC_CONFIG_COMMANDS([depfiles],
     [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS],
-     [AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"])
-])
+     [AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"])])

 # Do all the work for Automake.                             -*- Autoconf -*-

-# Copyright (C) 1996-2013 Free Software Foundation, Inc.
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -472,7 +464,7 @@ m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
 [_AM_SET_OPTIONS([$1])dnl
 dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
 m4_if(
-  m4_ifdef([AC_PACKAGE_NAME], [ok]):m4_ifdef([AC_PACKAGE_VERSION], [ok]),
+  m4_ifset([AC_PACKAGE_NAME], [ok]):m4_ifset([AC_PACKAGE_VERSION], [ok]),
  [ok:ok],,
  [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
 AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
@@ -495,11 +487,11 @@ AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
 AC_REQUIRE([AC_PROG_MKDIR_P])dnl
 # For better backward compatibility.  To be removed once Automake 1.9.x
 # dies out for good.  For more background, see:
-# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
-# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
 AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
-# We need awk for the "check" target.  The system "awk" is bad on
-# some platforms.
+# We need awk for the "check" target (and possibly the TAP driver).  The
+# system "awk" is bad on some platforms.
 AC_REQUIRE([AC_PROG_AWK])dnl
 AC_REQUIRE([AC_PROG_MAKE_SET])dnl
 AC_REQUIRE([AM_SET_LEADING_DOT])dnl
@@ -524,6 +516,20 @@ AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
 		  [m4_define([AC_PROG_OBJCXX],
 			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
 ])
+# Variables for tags utilities; see am/tags.am
+if test -z "$CTAGS"; then
+  CTAGS=ctags
+fi
+AC_SUBST([CTAGS])
+if test -z "$ETAGS"; then
+  ETAGS=etags
+fi
+AC_SUBST([ETAGS])
+if test -z "$CSCOPE"; then
+  CSCOPE=cscope
+fi
+AC_SUBST([CSCOPE])
+
 AC_REQUIRE([AM_SILENT_RULES])dnl
 dnl The testsuite driver may need to know about EXEEXT, so add the
 dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This
@@ -563,7 +569,7 @@ END
 Aborting the configuration process, to ensure you take notice of the issue.

 You can download and install GNU coreutils to get an 'rm' implementation
-that behaves properly: <http://www.gnu.org/software/coreutils/>.
+that behaves properly: <https://www.gnu.org/software/coreutils/>.

 If you want to complete the configuration process using your problematic
 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
@@ -573,6 +579,9 @@ END
    AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
  fi
 fi
+dnl The trailing newline in this macro's definition is deliberate, for
+dnl backward compatibility and to allow trailing 'dnl'-style comments
+dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
 ])

 dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
@@ -602,7 +611,7 @@ for _am_header in $config_headers :; do
 done
 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -613,7 +622,7 @@ echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_co
 # Define $install_sh.
 AC_DEFUN([AM_PROG_INSTALL_SH],
 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
-if test x"${install_sh}" != xset; then
+if test x"${install_sh+set}" != xset; then
  case $am_aux_dir in
  *\ * | *\	*)
    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
@@ -623,7 +632,7 @@ if test x"${install_sh}" != xset; then
 fi
 AC_SUBST([install_sh])])

-# Copyright (C) 2003-2013 Free Software Foundation, Inc.
+# Copyright (C) 2003-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -645,7 +654,7 @@ AC_SUBST([am__leading_dot])])
 # Add --enable-maintainer-mode option to configure.         -*- Autoconf -*-
 # From Jim Meyering

-# Copyright (C) 1996-2013 Free Software Foundation, Inc.
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -680,7 +689,7 @@ AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])

 # Check to see how 'make' treats includes.	            -*- Autoconf -*-

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -688,49 +697,42 @@ AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])

 # AM_MAKE_INCLUDE()
 # -----------------
-# Check to see how make treats includes.
+# Check whether make has an 'include' directive that can support all
+# the idioms we need for our automatic dependency tracking code.
 AC_DEFUN([AM_MAKE_INCLUDE],
-[am_make=${MAKE-make}
-cat > confinc << 'END'
+[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
+cat > confinc.mk << 'END'
 am__doit:
-	@echo this is the am__doit target
+	@echo this is the am__doit target >confinc.out
 .PHONY: am__doit
 END
-# If we don't find an include directive, just comment out the code.
-AC_MSG_CHECKING([for style of include used by $am_make])
 am__include="#"
 am__quote=
-_am_result=none
-# First try GNU make style include.
-echo "include confinc" > confmf
-# Ignore all kinds of additional output from 'make'.
-case `$am_make -s -f confmf 2> /dev/null` in #(
-*the\ am__doit\ target*)
-  am__include=include
-  am__quote=
-  _am_result=GNU
-  ;;
-esac
-# Now try BSD make style include.
-if test "$am__include" = "#"; then
-   echo '.include "confinc"' > confmf
-   case `$am_make -s -f confmf 2> /dev/null` in #(
-   *the\ am__doit\ target*)
-     am__include=.include
-     am__quote="\""
-     _am_result=BSD
-     ;;
-   esac
-fi
-AC_SUBST([am__include])
-AC_SUBST([am__quote])
-AC_MSG_RESULT([$_am_result])
-rm -f confinc confmf
-])
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
+  AS_CASE([$?:`cat confinc.out 2>/dev/null`],
+      ['0:this is the am__doit target'],
+      [AS_CASE([$s],
+          [BSD], [am__include='.include' am__quote='"'],
+          [am__include='include' am__quote=''])])
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+AC_MSG_RESULT([${_am_result}])
+AC_SUBST([am__include])])
+AC_SUBST([am__quote])])

 # Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-

-# Copyright (C) 1997-2013 Free Software Foundation, Inc.
+# Copyright (C) 1997-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -751,12 +753,7 @@ AC_DEFUN([AM_MISSING_HAS_RUN],
 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 AC_REQUIRE_AUX_FILE([missing])dnl
 if test x"${MISSING+set}" != xset; then
-  case $am_aux_dir in
-  *\ * | *\	*)
-    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
-  *)
-    MISSING="\${SHELL} $am_aux_dir/missing" ;;
-  esac
+  MISSING="\${SHELL} '$am_aux_dir/missing'"
 fi
 # Use eval to expand $SHELL
 if eval "$MISSING --is-lightweight"; then
@@ -769,7 +766,7 @@ fi

 # Helper functions for option handling.                     -*- Autoconf -*-

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -798,7 +795,7 @@ AC_DEFUN([_AM_SET_OPTIONS],
 AC_DEFUN([_AM_IF_OPTION],
 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])

-# Copyright (C) 1999-2013 Free Software Foundation, Inc.
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -845,7 +842,7 @@ AC_LANG_POP([C])])
 # For backward compatibility.
 AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -864,7 +861,7 @@ AC_DEFUN([AM_RUN_LOG],

 # Check to make sure that the build environment is sane.    -*- Autoconf -*-

-# Copyright (C) 1996-2013 Free Software Foundation, Inc.
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -945,7 +942,7 @@ AC_CONFIG_COMMANDS_PRE(
 rm -f conftest.file
 ])

-# Copyright (C) 2009-2013 Free Software Foundation, Inc.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -1005,7 +1002,7 @@ AC_SUBST([AM_BACKSLASH])dnl
 _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
 ])

-# Copyright (C) 2001-2013 Free Software Foundation, Inc.
+# Copyright (C) 2001-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -1033,7 +1030,7 @@ fi
 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 AC_SUBST([INSTALL_STRIP_PROGRAM])])

-# Copyright (C) 2006-2013 Free Software Foundation, Inc.
+# Copyright (C) 2006-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -1052,7 +1049,7 @@ AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])

 # Check how to create a tarball.                            -*- Autoconf -*-

-# Copyright (C) 2004-2013 Free Software Foundation, Inc.
+# Copyright (C) 2004-2021 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
--- a/22
+++ b/22
@@ -1,22 +0,0 @@
-#!/bin/sh
-
-LIBTOOLIZE="libtoolize"
-
-if [ "x`which $LIBTOOLIZE`" = "x" ]; then
-    LIBTOOLIZE="glibtoolize"
-fi
-
-if [ "x`which $LIBTOOLIZE`" = "x" ]; then
-    echo "Neither libtoolize nor glibtoolize could be found!"
-    exit 1
-fi
-
-${LIBTOOLIZE} --copy --automake --force
-${ACLOCAL:-aclocal} -I m4 $ACLOCAL_FLAGS
-${AUTOHEADER:-autoheader}
-# copy the private libssh2_config.h.in to the examples dir so that
-# it can be included without pointing the include path to the private
-# source dir
-cp src/libssh2_config.h.in example/libssh2_config.h.in
-${AUTOCONF:-autoconf}
-${AUTOMAKE:-automake} --add-missing --copy
--- a/cmake/CheckFunctionExistsMayNeedLibrary.cmake
+++ b/cmake/CheckFunctionExistsMayNeedLibrary.cmake
@@ -0,0 +1,81 @@
+# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+
+# - check_function_exists_maybe_need_library(<function> <var> [lib1 ... libn])
+#
+# Check if function is available for linking, first without extra libraries, and
+# then, if not found that way, linking in each optional library as well.  This
+# function is similar to autotools AC_SEARCH_LIBS.
+#
+# If the function if found, this will define <var>.
+#
+# If the function was only found by linking in an additional library, this
+# will define NEED_LIB_LIBX, where LIBX is the one of lib1 to libn that
+# makes the function available, in uppercase.
+#
+# The following variables may be set before calling this macro to
+# modify the way the check is run:
+#
+#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
+#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
+#  CMAKE_REQUIRED_INCLUDES = list of include directories
+#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+#
+
+include(CheckFunctionExists)
+include(CheckLibraryExists)
+
+function(check_function_exists_may_need_library function variable)
+
+  check_function_exists(${function} ${variable})
+
+  if(NOT ${variable})
+    foreach(lib ${ARGN})
+      string(TOUPPER ${lib} UP_LIB)
+      # Use new variable to prevent cache from previous step shortcircuiting
+      # new test
+      check_library_exists(${lib} ${function} "" HAVE_${function}_IN_${lib})
+      if(HAVE_${function}_IN_${lib})
+	set(${variable} 1 CACHE INTERNAL
+	  "Function ${function} found in library ${lib}")
+	set(NEED_LIB_${UP_LIB} 1 CACHE INTERNAL
+	  "Need to link ${lib}")
+	break()
+      endif()
+    endforeach()
+  endif()
+
+endfunction()
--- a/cmake/CheckNonblockingSocketSupport.cmake
+++ b/cmake/CheckNonblockingSocketSupport.cmake
@@ -0,0 +1,119 @@
+include(CheckCSourceCompiles)
+
+# - check_nonblocking_socket_support()
+#
+# Check for how to set a socket to non-blocking state. There seems to exist
+# four known different ways, with the one used almost everywhere being POSIX
+# and XPG3, while the other different ways for different systems (old BSD,
+# Windows and Amiga).
+#
+# One of the following variables will be set indicating the supported
+# method (if any):
+#   HAVE_O_NONBLOCK
+#   HAVE_FIONBIO
+#   HAVE_IOCTLSOCKET
+#   HAVE_IOCTLSOCKET_CASE
+#   HAVE_SO_NONBLOCK
+#   HAVE_DISABLED_NONBLOCKING
+#
+# The following variables may be set before calling this macro to
+# modify the way the check is run:
+#
+#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
+#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
+#  CMAKE_REQUIRED_INCLUDES = list of include directories
+#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+#
+macro(check_nonblocking_socket_support)
+  # There are two known platforms (AIX 3.x and SunOS 4.1.x) where the
+  # O_NONBLOCK define is found but does not work.
+  check_c_source_compiles("
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#if defined(sun) || defined(__sun__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC)
+# if defined(__SVR4) || defined(__srv4__)
+#  define PLATFORM_SOLARIS
+# else
+#  define PLATFORM_SUNOS4
+# endif
+#endif
+#if (defined(_AIX) || defined(__xlC__)) && !defined(_AIX41)
+# define PLATFORM_AIX_V3
+#endif
+
+#if defined(PLATFORM_SUNOS4) || defined(PLATFORM_AIX_V3) || defined(__BEOS__)
+#error \"O_NONBLOCK does not work on this platform\"
+#endif
+
+int main()
+{
+    int socket;
+    int flags = fcntl(socket, F_SETFL, flags | O_NONBLOCK);
+}"
+  HAVE_O_NONBLOCK)
+
+  if(NOT HAVE_O_NONBLOCK)
+    check_c_source_compiles("/* FIONBIO test (old-style unix) */
+#include <unistd.h>
+#include <stropts.h>
+
+int main()
+{
+    int socket;
+    int flags = ioctl(socket, FIONBIO, &flags);
+}"
+    HAVE_FIONBIO)
+
+    if(NOT HAVE_FIONBIO)
+      check_c_source_compiles("/* ioctlsocket test (Windows) */
+#undef inline
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <windows.h>
+#include <winsock2.h>
+
+int main()
+{
+    SOCKET sd;
+    unsigned long flags = 0;
+    sd = socket(0, 0, 0);
+    ioctlsocket(sd, FIONBIO, &flags);
+}"
+      HAVE_IOCTLSOCKET)
+
+      if(NOT HAVE_IOCTLSOCKET)
+	check_c_source_compiles("/* IoctlSocket test (Amiga?) */
+#include <sys/ioctl.h>
+
+int main()
+{
+    int socket;
+    int flags = IoctlSocket(socket, FIONBIO, (long)1);
+}"
+        HAVE_IOCTLSOCKET_CASE)
+
+        if(NOT HAVE_IOCTLSOCKET_CASE)
+	  check_c_source_compiles("/* SO_NONBLOCK test (BeOS) */
+#include <socket.h>
+
+int main()
+{
+    long b = 1;
+    int socket;
+    int flags = setsockopt(socket, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
+}"
+          HAVE_SO_NONBLOCK)
+
+	  if(NOT HAVE_SO_NONBLOCK)
+	    # No non-blocking socket method found
+	    set(HAVE_DISABLED_NONBLOCKING 1)
+	  endif()
+	endif()
+      endif()
+    endif()
+  endif()
+endmacro()
--- a/cmake/CopyRuntimeDependencies.cmake
+++ b/cmake/CopyRuntimeDependencies.cmake
@@ -0,0 +1,72 @@
+# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+include(CMakeParseArguments)
+
+function(ADD_TARGET_TO_COPY_DEPENDENCIES)
+  set(options)
+  set(oneValueArgs TARGET)
+  set(multiValueArgs DEPENDENCIES BEFORE_TARGETS)
+  cmake_parse_arguments(COPY
+    "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+  if(NOT COPY_DEPENDENCIES)
+    return()
+  endif()
+
+  # Using a custom target to drive custom commands stops multiple
+  # parallel builds trying to kick off the commands at the same time
+  add_custom_target(${COPY_TARGET})
+
+  foreach(target ${COPY_BEFORE_TARGETS})
+    add_dependencies(${target} ${COPY_TARGET})
+  endforeach()
+
+  foreach(dependency ${COPY_DEPENDENCIES})
+
+    add_custom_command(
+      TARGET ${COPY_TARGET}
+      DEPENDS ${dependency}
+      # Make directory first otherwise file is copied in place of
+      # directory instead of into it
+      COMMAND ${CMAKE_COMMAND}
+      ARGS -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}
+      COMMAND ${CMAKE_COMMAND}
+      ARGS -E copy ${dependency} ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}
+      VERBATIM)
+
+  endforeach()
+
+endfunction()
--- a/cmake/FindLibgcrypt.cmake
+++ b/cmake/FindLibgcrypt.cmake
@@ -0,0 +1,53 @@
+# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+# - Try to find Libgcrypt
+# This will define all or none of:
+#  LIBGCRYPT_FOUND - if Libgcrypt headers and library was found
+#  LIBGCRYPT_INCLUDE_DIRS - The Libgcrypt include directories
+#  LIBGCRYPT_LIBRARIES - The libraries needed to use Libgcrypt
+
+find_path(LIBGCRYPT_INCLUDE_DIR gcrypt.h)
+
+find_library(LIBGCRYPT_LIBRARY NAMES gcrypt libgcrypt)
+
+set(LIBGCRYPT_LIBRARIES ${LIBGCRYPT_LIBRARY})
+set(LIBGCRYPT_INCLUDE_DIRS ${LIBGCRYPT_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Libgcrypt DEFAULT_MSG
+                                  LIBGCRYPT_LIBRARY LIBGCRYPT_INCLUDE_DIR)
+
+mark_as_advanced(LIBGCRYPT_INCLUDE_DIR LIBGCRYPT_LIBRARY)
--- a/cmake/FindmbedTLS.cmake
+++ b/cmake/FindmbedTLS.cmake
@@ -0,0 +1,64 @@
+# - Try to find mbedTLS
+# Once done this will define
+#
+# Read-Only variables
+#  MBEDTLS_FOUND - system has mbedTLS
+#  MBEDTLS_INCLUDE_DIR - the mbedTLS include directory
+#  MBEDTLS_LIBRARY_DIR - the mbedTLS library directory
+#  MBEDTLS_LIBRARIES - Link these to use mbedTLS
+#  MBEDTLS_LIBRARY - path to mbedTLS library
+#  MBEDX509_LIBRARY - path to mbedTLS X.509 library
+#  MBEDCRYPTO_LIBRARY - path to mbedTLS Crypto library
+
+FIND_PATH(MBEDTLS_INCLUDE_DIR mbedtls/version.h)
+
+IF(MBEDTLS_INCLUDE_DIR AND MBEDTLS_LIBRARIES)
+    # Already in cache, be silent
+    SET(MBEDTLS_FIND_QUIETLY TRUE)
+ENDIF()
+
+FIND_LIBRARY(MBEDTLS_LIBRARY NAMES mbedtls libmbedtls libmbedx509)
+FIND_LIBRARY(MBEDX509_LIBRARY NAMES mbedx509 libmbedx509)
+FIND_LIBRARY(MBEDCRYPTO_LIBRARY NAMES mbedcrypto libmbedcrypto)
+
+IF(MBEDTLS_INCLUDE_DIR AND MBEDTLS_LIBRARY AND MBEDX509_LIBRARY AND MBEDCRYPTO_LIBRARY)
+     SET(MBEDTLS_FOUND TRUE)
+ENDIF()
+
+IF(MBEDTLS_FOUND)
+    # split mbedTLS into -L and -l linker options, so we can set them for pkg-config
+    GET_FILENAME_COMPONENT(MBEDTLS_LIBRARY_DIR ${MBEDTLS_LIBRARY} PATH)
+    GET_FILENAME_COMPONENT(MBEDTLS_LIBRARY_FILE ${MBEDTLS_LIBRARY} NAME_WE)
+    GET_FILENAME_COMPONENT(MBEDX509_LIBRARY_FILE ${MBEDX509_LIBRARY} NAME_WE)
+    GET_FILENAME_COMPONENT(MBEDCRYPTO_LIBRARY_FILE ${MBEDCRYPTO_LIBRARY} NAME_WE)
+    STRING(REGEX REPLACE "^lib" "" MBEDTLS_LIBRARY_FILE ${MBEDTLS_LIBRARY_FILE})
+    STRING(REGEX REPLACE "^lib" "" MBEDX509_LIBRARY_FILE ${MBEDX509_LIBRARY_FILE})
+    STRING(REGEX REPLACE "^lib" "" MBEDCRYPTO_LIBRARY_FILE ${MBEDCRYPTO_LIBRARY_FILE})
+    SET(MBEDTLS_LIBRARIES "-L${MBEDTLS_LIBRARY_DIR} -l${MBEDTLS_LIBRARY_FILE} -l${MBEDX509_LIBRARY_FILE} -l${MBEDCRYPTO_LIBRARY_FILE}")
+
+    IF(NOT MBEDTLS_FIND_QUIETLY)
+        MESSAGE(STATUS "Found mbedTLS:")
+        FILE(READ ${MBEDTLS_INCLUDE_DIR}/mbedtls/version.h MBEDTLSCONTENT)
+        STRING(REGEX MATCH "MBEDTLS_VERSION_STRING +\"[0-9|.]+\"" MBEDTLSMATCH ${MBEDTLSCONTENT})
+        IF (MBEDTLSMATCH)
+            STRING(REGEX REPLACE "MBEDTLS_VERSION_STRING +\"([0-9|.]+)\"" "\\1" MBEDTLS_VERSION ${MBEDTLSMATCH})
+            MESSAGE(STATUS "  version ${MBEDTLS_VERSION}")
+        ENDIF(MBEDTLSMATCH)
+        MESSAGE(STATUS "  TLS: ${MBEDTLS_LIBRARY}")
+        MESSAGE(STATUS "  X509: ${MBEDX509_LIBRARY}")
+        MESSAGE(STATUS "  Crypto: ${MBEDCRYPTO_LIBRARY}")
+    ENDIF(NOT MBEDTLS_FIND_QUIETLY)
+ELSE(MBEDTLS_FOUND)
+    IF(MBEDTLS_FIND_REQUIRED)
+        MESSAGE(FATAL_ERROR "Could not find mbedTLS")
+    ENDIF(MBEDTLS_FIND_REQUIRED)
+ENDIF(MBEDTLS_FOUND)
+
+MARK_AS_ADVANCED(
+    MBEDTLS_INCLUDE_DIR
+    MBEDTLS_LIBRARY_DIR
+    MBEDTLS_LIBRARIES
+    MBEDTLS_LIBRARY
+    MBEDX509_LIBRARY
+    MBEDCRYPTO_LIBRARY
+)
--- a/cmake/SocketLibraries.cmake
+++ b/cmake/SocketLibraries.cmake
@@ -0,0 +1,64 @@
+# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+# Some systems have their socket functions in a library.
+# (Solaris -lsocket/-lnsl, Windows -lws2_32).  This macro appends those
+# libraries to the given list
+macro(append_needed_socket_libraries LIBRARIES_LIST)
+  if(CMAKE_SYSTEM_NAME STREQUAL "Windows" AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+    # x86 Windows uses STDCALL for these functions, so their names are mangled,
+    # meaning the platform checks don't work. Hardcoding these until we get
+    # a better solution.
+    set(HAVE_SOCKET 1)
+    set(HAVE_SELECT 1)
+    set(HAVE_INET_ADDR 1)
+    set(NEED_LIB_WS2_32 1)
+  else()
+    check_function_exists_may_need_library(socket HAVE_SOCKET socket ws2_32)
+    check_function_exists_may_need_library(select HAVE_SELECT ws2_32)
+    check_function_exists_may_need_library(inet_addr HAVE_INET_ADDR nsl ws2_32)
+  endif()
+
+  if(NEED_LIB_SOCKET)
+    list(APPEND ${LIBRARIES_LIST} socket)
+  endif()
+  if(NEED_LIB_NSL)
+    list(APPEND ${LIBRARIES_LIST} nsl)
+  endif()
+  if(NEED_LIB_WS2_32)
+    list(APPEND ${LIBRARIES_LIST} ws2_32)
+  endif()
+
+endmacro()
--- a/cmake/Toolchain-Linux-32.cmake
+++ b/cmake/Toolchain-Linux-32.cmake
@@ -0,0 +1,42 @@
+# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+# Cross-compile 32-bit binary on 64-bit linux host
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR "i386")
+
+set(CMAKE_CXX_COMPILER_ARG1 "-m32")
+set(CMAKE_C_COMPILER_ARG1 "-m32")
--- a/cmake/max_warnings.cmake
+++ b/cmake/max_warnings.cmake
@@ -0,0 +1,23 @@
+if(MSVC)
+  # Use the highest warning level for visual studio.
+  if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
+    string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  else()
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
+  endif()
+  if(CMAKE_C_FLAGS MATCHES "/W[0-4]")
+    string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
+  else()
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4")
+  endif()
+
+  # Disable broken warnings
+  add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE)
+elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+  if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+  endif()
+  if(NOT CMAKE_C_FLAGS MATCHES "-Wall")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+  endif()
+endif()
--- a/17
+++ b/17
@@ -1,9 +1,9 @@
 #! /bin/sh
 # Wrapper for compilers which do not understand '-c -o'.

-scriptversion=2012-10-14.11; # UTC
+scriptversion=2018-03-07.03; # UTC

-# Copyright (C) 1999-2013 Free Software Foundation, Inc.
+# Copyright (C) 1999-2020 Free Software Foundation, Inc.
 # Written by Tom Tromey <tromey@cygnus.com>.
 #
 # This program is free software; you can redistribute it and/or modify
@@ -17,7 +17,7 @@ scriptversion=2012-10-14.11; # UTC
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.

 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@@ -53,7 +53,7 @@ func_file_conv ()
 	  MINGW*)
 	    file_conv=mingw
 	    ;;
-	  CYGWIN*)
+	  CYGWIN* | MSYS*)
 	    file_conv=cygwin
 	    ;;
 	  *)
@@ -67,7 +67,7 @@ func_file_conv ()
 	mingw/*)
 	  file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
 	  ;;
-	cygwin/*)
+	cygwin/* | msys/*)
 	  file=`cygpath -m "$file" || echo "$file"`
 	  ;;
 	wine/*)
@@ -255,7 +255,8 @@ EOF
    echo "compile $scriptversion"
    exit $?
    ;;
-  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe )
+  cl | *[/\\]cl | cl.exe | *[/\\]cl.exe | \
+  icl | *[/\\]icl | icl.exe | *[/\\]icl.exe )
    func_cl_wrapper "$@"      # Doesn't return...
    ;;
 esac
@@ -339,9 +340,9 @@ exit $ret
 # Local Variables:
 # mode: shell-script
 # sh-indentation: 2
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC"
+# time-stamp-time-zone: "UTC0"
 # time-stamp-end: "; # UTC"
 # End:
--- a/config.guess
+++ b/config.guess
--- a/config.sub
+++ b/config.sub
@@ -1,36 +1,31 @@
 #! /bin/sh
 # Configuration validation subroutine script.
-#   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-#   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
-#   2011, 2012 Free Software Foundation, Inc.
+#   Copyright 1992-2018 Free Software Foundation, Inc.

-timestamp='2012-02-10'
+timestamp='2018-02-22'

-# This file is (in principle) common to ALL GNU software.
-# The presence of a machine in this file suggests that SOME GNU software
-# can handle that machine.  It does not imply ALL GNU software can.
-#
-# This file is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
 # (at your option) any later version.
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program; if not, see <http://www.gnu.org/licenses/>.
+# along with this program; if not, see <https://www.gnu.org/licenses/>.
 #
 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
 # configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
+# the same distribution terms that you use for the rest of that
+# program.  This Exception is an additional permission under section 7
+# of the GNU General Public License, version 3 ("GPLv3").


-# Please send patches to <config-patches@gnu.org>.  Submit a context
-# diff and a properly formatted GNU ChangeLog entry.
+# Please send patches to <config-patches@gnu.org>.
 #
 # Configuration subroutine to validate and canonicalize a configuration type.
 # Supply the specified configuration type as an argument.
@@ -38,7 +33,7 @@ timestamp='2012-02-10'
 # Otherwise, we print the canonical config type on stdout and succeed.

 # You can get the latest version of this script from:
-# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
+# https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub

 # This file is supposed to be the same for all GNU packages
 # and recognize all the CPU types, system types and aliases
@@ -58,12 +53,11 @@ timestamp='2012-02-10'
 me=`echo "$0" | sed -e 's,.*/,,'`

 usage="\
-Usage: $0 [OPTION] CPU-MFR-OPSYS
-       $0 [OPTION] ALIAS
+Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS

 Canonicalize a configuration name.

-Operation modes:
+Options:
  -h, --help         print this help, then exit
  -t, --time-stamp   print date of last modification, then exit
  -v, --version      print version number, then exit
@@ -73,9 +67,7 @@ Report bugs and patches to <config-patches@gnu.org>."
 version="\
 GNU config.sub ($timestamp)

-Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
-Free Software Foundation, Inc.
+Copyright 1992-2018 Free Software Foundation, Inc.

 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
@@ -102,7 +94,7 @@ while test $# -gt 0 ; do

    *local*)
       # First pass through any local machine types.
-       echo $1
+       echo "$1"
       exit ;;

    * )
@@ -120,24 +112,24 @@ esac

 # Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
 # Here we must recognize all the valid KERNEL-OS combinations.
-maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
+maybe_os=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
 case $maybe_os in
  nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \
-  linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \
-  knetbsd*-gnu* | netbsd*-gnu* | \
-  kopensolaris*-gnu* | \
+  linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \
+  knetbsd*-gnu* | netbsd*-gnu* | netbsd*-eabi* | \
+  kopensolaris*-gnu* | cloudabi*-eabi* | \
  storm-chaos* | os2-emx* | rtmk-nova*)
    os=-$maybe_os
-    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
+    basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
    ;;
  android-linux)
    os=-linux-android
-    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown
+    basic_machine=`echo "$1" | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown
    ;;
  *)
-    basic_machine=`echo $1 | sed 's/-[^-]*$//'`
-    if [ $basic_machine != $1 ]
-    then os=`echo $1 | sed 's/.*-/-/'`
+    basic_machine=`echo "$1" | sed 's/-[^-]*$//'`
+    if [ "$basic_machine" != "$1" ]
+    then os=`echo "$1" | sed 's/.*-/-/'`
    else os=; fi
    ;;
 esac
@@ -156,7 +148,7 @@ case $os in
 	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
 	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
 	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
-	-apple | -axis | -knuth | -cray | -microblaze)
+	-apple | -axis | -knuth | -cray | -microblaze*)
 		os=
 		basic_machine=$1
 		;;
@@ -186,53 +178,56 @@ case $os in
 		;;
 	-sco6)
 		os=-sco5v6
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-sco5)
 		os=-sco3.2v5
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-sco4)
 		os=-sco3.2v4
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-sco3.2.[4-9]*)
 		os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-sco3.2v[4-9]*)
 		# Don't forget version if it is 3.2v4 or newer.
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-sco5v6*)
 		# Don't forget version if it is 3.2v4 or newer.
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-sco*)
 		os=-sco3.2v2
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-udk*)
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-isc)
 		os=-isc2.2
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
 		;;
 	-clix*)
 		basic_machine=clipper-intergraph
 		;;
 	-isc*)
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-pc/'`
+		;;
+	-lynx*178)
+		os=-lynxos178
+		;;
+	-lynx*5)
+		os=-lynxos5
 		;;
 	-lynx*)
 		os=-lynxos
 		;;
 	-ptx*)
-		basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
-		;;
-	-windowsnt*)
-		os=`echo $os | sed -e 's/windowsnt/winnt/'`
+		basic_machine=`echo "$1" | sed -e 's/86-.*/86-sequent/'`
 		;;
 	-psos*)
 		os=-psos
@@ -253,21 +248,25 @@ case $basic_machine in
 	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
 	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
 	| am33_2.0 \
-	| arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] | avr | avr32 \
-        | be32 | be64 \
+	| arc | arceb \
+	| arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
+	| avr | avr32 \
+	| ba \
+	| be32 | be64 \
 	| bfin \
-	| c4x | clipper \
+	| c4x | c8051 | clipper \
 	| d10v | d30v | dlx | dsp16xx \
-	| epiphany \
-	| fido | fr30 | frv \
+	| e2k | epiphany \
+	| fido | fr30 | frv | ft32 \
 	| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
 	| hexagon \
-	| i370 | i860 | i960 | ia64 \
+	| i370 | i860 | i960 | ia16 | ia64 \
 	| ip2k | iq2000 \
+	| k1om \
 	| le32 | le64 \
 	| lm32 \
 	| m32c | m32r | m32rle | m68000 | m68k | m88k \
-	| maxq | mb | microblaze | mcore | mep | metag \
+	| maxq | mb | microblaze | microblazeel | mcore | mep | metag \
 	| mips | mipsbe | mipseb | mipsel | mipsle \
 	| mips16 \
 	| mips64 | mips64el \
@@ -281,26 +280,30 @@ case $basic_machine in
 	| mips64vr5900 | mips64vr5900el \
 	| mipsisa32 | mipsisa32el \
 	| mipsisa32r2 | mipsisa32r2el \
+	| mipsisa32r6 | mipsisa32r6el \
 	| mipsisa64 | mipsisa64el \
 	| mipsisa64r2 | mipsisa64r2el \
+	| mipsisa64r6 | mipsisa64r6el \
 	| mipsisa64sb1 | mipsisa64sb1el \
 	| mipsisa64sr71k | mipsisa64sr71kel \
+	| mipsr5900 | mipsr5900el \
 	| mipstx39 | mipstx39el \
 	| mn10200 | mn10300 \
 	| moxie \
 	| mt \
 	| msp430 \
 	| nds32 | nds32le | nds32be \
-	| nios | nios2 \
+	| nios | nios2 | nios2eb | nios2el \
 	| ns16k | ns32k \
-	| open8 \
-	| or32 \
-	| pdp10 | pdp11 | pj | pjl \
+	| open8 | or1k | or1knd | or32 \
+	| pdp10 | pj | pjl \
 	| powerpc | powerpc64 | powerpc64le | powerpcle \
+	| pru \
 	| pyramid \
+	| riscv32 | riscv64 \
 	| rl78 | rx \
 	| score \
-	| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[34]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
+	| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[234]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
 	| sh64 | sh64le \
 	| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \
 	| sparcv8 | sparcv9 | sparcv9b | sparcv9v \
@@ -308,7 +311,8 @@ case $basic_machine in
 	| tahoe | tic4x | tic54x | tic55x | tic6x | tic80 | tron \
 	| ubicom32 \
 	| v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \
-	| we32k \
+	| visium \
+	| wasm32 \
 	| x86 | xc16x | xstormy16 | xtensa \
 	| z8k | z80)
 		basic_machine=$basic_machine-unknown
@@ -322,11 +326,14 @@ case $basic_machine in
 	c6x)
 		basic_machine=tic6x-unknown
 		;;
-	m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | picochip)
+	leon|leon[3-9])
+		basic_machine=sparc-$basic_machine
+		;;
+	m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | nvptx | picochip)
 		basic_machine=$basic_machine-unknown
 		os=-none
 		;;
-	m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k)
+	m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65)
 		;;
 	ms1)
 		basic_machine=mt-unknown
@@ -355,7 +362,7 @@ case $basic_machine in
 	  ;;
 	# Object if more than one company name word.
 	*-*-*)
-		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2
 		exit 1
 		;;
 	# Recognize the basic CPU types with company name.
@@ -364,26 +371,29 @@ case $basic_machine in
 	| aarch64-* | aarch64_be-* \
 	| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
 	| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
-	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* \
+	| alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \
 	| arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
 	| avr-* | avr32-* \
+	| ba-* \
 	| be32-* | be64-* \
 	| bfin-* | bs2000-* \
 	| c[123]* | c30-* | [cjt]90-* | c4x-* \
-	| clipper-* | craynv-* | cydra-* \
+	| c8051-* | clipper-* | craynv-* | cydra-* \
 	| d10v-* | d30v-* | dlx-* \
-	| elxsi-* \
+	| e2k-* | elxsi-* \
 	| f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
 	| h8300-* | h8500-* \
 	| hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
 	| hexagon-* \
-	| i*86-* | i860-* | i960-* | ia64-* \
+	| i*86-* | i860-* | i960-* | ia16-* | ia64-* \
 	| ip2k-* | iq2000-* \
+	| k1om-* \
 	| le32-* | le64-* \
 	| lm32-* \
 	| m32c-* | m32r-* | m32rle-* \
 	| m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
-	| m88110-* | m88k-* | maxq-* | mcore-* | metag-* | microblaze-* \
+	| m88110-* | m88k-* | maxq-* | mcore-* | metag-* \
+	| microblaze-* | microblazeel-* \
 	| mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
 	| mips16-* \
 	| mips64-* | mips64el-* \
@@ -397,28 +407,34 @@ case $basic_machine in
 	| mips64vr5900-* | mips64vr5900el-* \
 	| mipsisa32-* | mipsisa32el-* \
 	| mipsisa32r2-* | mipsisa32r2el-* \
+	| mipsisa32r6-* | mipsisa32r6el-* \
 	| mipsisa64-* | mipsisa64el-* \
 	| mipsisa64r2-* | mipsisa64r2el-* \
+	| mipsisa64r6-* | mipsisa64r6el-* \
 	| mipsisa64sb1-* | mipsisa64sb1el-* \
 	| mipsisa64sr71k-* | mipsisa64sr71kel-* \
+	| mipsr5900-* | mipsr5900el-* \
 	| mipstx39-* | mipstx39el-* \
 	| mmix-* \
 	| mt-* \
 	| msp430-* \
 	| nds32-* | nds32le-* | nds32be-* \
-	| nios-* | nios2-* \
+	| nios-* | nios2-* | nios2eb-* | nios2el-* \
 	| none-* | np1-* | ns16k-* | ns32k-* \
 	| open8-* \
+	| or1k*-* \
 	| orion-* \
 	| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
 	| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
+	| pru-* \
 	| pyramid-* \
+	| riscv32-* | riscv64-* \
 	| rl78-* | romp-* | rs6000-* | rx-* \
 	| sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
 	| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
 	| sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \
 	| sparclite-* \
-	| sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx?-* \
+	| sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx*-* \
 	| tahoe-* \
 	| tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
 	| tile*-* \
@@ -426,6 +442,8 @@ case $basic_machine in
 	| ubicom32-* \
 	| v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \
 	| vax-* \
+	| visium-* \
+	| wasm32-* \
 	| we32k-* \
 	| x86-* | x86_64-* | xc16x-* | xps100-* \
 	| xstormy16-* | xtensa*-* \
@@ -439,7 +457,7 @@ case $basic_machine in
 	# Recognize the various machine names and aliases which stand
 	# for a CPU type and a company and sometimes even an OS.
 	386bsd)
-		basic_machine=i386-unknown
+		basic_machine=i386-pc
 		os=-bsd
 		;;
 	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
@@ -473,7 +491,7 @@ case $basic_machine in
 		basic_machine=x86_64-pc
 		;;
 	amd64-*)
-		basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=x86_64-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	amdahl)
 		basic_machine=580-amdahl
@@ -502,6 +520,9 @@ case $basic_machine in
 		basic_machine=i386-pc
 		os=-aros
 		;;
+	asmjs)
+		basic_machine=asmjs-unknown
+		;;
 	aux)
 		basic_machine=m68k-apple
 		os=-aux
@@ -515,7 +536,7 @@ case $basic_machine in
 		os=-linux
 		;;
 	blackfin-*)
-		basic_machine=bfin-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=bfin-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		os=-linux
 		;;
 	bluegene*)
@@ -523,13 +544,13 @@ case $basic_machine in
 		os=-cnk
 		;;
 	c54x-*)
-		basic_machine=tic54x-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=tic54x-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	c55x-*)
-		basic_machine=tic55x-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=tic55x-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	c6x-*)
-		basic_machine=tic6x-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=tic6x-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	c90)
 		basic_machine=c90-cray
@@ -618,10 +639,18 @@ case $basic_machine in
 		basic_machine=rs6000-bull
 		os=-bosx
 		;;
-	dpx2* | dpx2*-bull)
+	dpx2*)
 		basic_machine=m68k-bull
 		os=-sysv3
 		;;
+	e500v[12])
+		basic_machine=powerpc-unknown
+		os=$os"spe"
+		;;
+	e500v[12]-*)
+		basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+		os=$os"spe"
+		;;
 	ebmon29k)
 		basic_machine=a29k-amd
 		os=-ebmon
@@ -711,9 +740,6 @@ case $basic_machine in
 	hp9k8[0-9][0-9] | hp8[0-9][0-9])
 		basic_machine=hppa1.0-hp
 		;;
-	hppa-next)
-		os=-nextstep3
-		;;
 	hppaosf)
 		basic_machine=hppa1.1-hp
 		os=-osf
@@ -726,26 +752,26 @@ case $basic_machine in
 		basic_machine=i370-ibm
 		;;
 	i*86v32)
-		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
 		os=-sysv32
 		;;
 	i*86v4*)
-		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
 		os=-sysv4
 		;;
 	i*86v)
-		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
 		os=-sysv
 		;;
 	i*86sol2)
-		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
 		os=-solaris2
 		;;
 	i386mach)
 		basic_machine=i386-mach
 		os=-mach
 		;;
-	i386-vsta | vsta)
+	vsta)
 		basic_machine=i386-unknown
 		os=-vsta
 		;;
@@ -763,17 +789,17 @@ case $basic_machine in
 		basic_machine=m68k-isi
 		os=-sysv
 		;;
+	leon-*|leon[3-9]-*)
+		basic_machine=sparc-`echo "$basic_machine" | sed 's/-.*//'`
+		;;
 	m68knommu)
 		basic_machine=m68k-unknown
 		os=-linux
 		;;
 	m68knommu-*)
-		basic_machine=m68k-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=m68k-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		os=-linux
 		;;
-	m88k-omron*)
-		basic_machine=m88k-omron
-		;;
 	magnum | m3230)
 		basic_machine=mips-mips
 		os=-sysv
@@ -782,11 +808,15 @@ case $basic_machine in
 		basic_machine=ns32k-utek
 		os=-sysv
 		;;
-	microblaze)
+	microblaze*)
 		basic_machine=microblaze-xilinx
 		;;
+	mingw64)
+		basic_machine=x86_64-pc
+		os=-mingw64
+		;;
 	mingw32)
-		basic_machine=i386-pc
+		basic_machine=i686-pc
 		os=-mingw32
 		;;
 	mingw32ce)
@@ -801,10 +831,10 @@ case $basic_machine in
 		os=-mint
 		;;
 	mips3*-*)
-		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
+		basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'`
 		;;
 	mips3*)
-		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
+		basic_machine=`echo "$basic_machine" | sed -e 's/mips3/mips64/'`-unknown
 		;;
 	monitor)
 		basic_machine=m68k-rom68k
@@ -814,15 +844,19 @@ case $basic_machine in
 		basic_machine=powerpc-unknown
 		os=-morphos
 		;;
+	moxiebox)
+		basic_machine=moxie-unknown
+		os=-moxiebox
+		;;
 	msdos)
 		basic_machine=i386-pc
 		os=-msdos
 		;;
 	ms1-*)
-		basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'`
+		basic_machine=`echo "$basic_machine" | sed -e 's/ms1-/mt-/'`
 		;;
 	msys)
-		basic_machine=i386-pc
+		basic_machine=i686-pc
 		os=-msys
 		;;
 	mvs)
@@ -861,7 +895,7 @@ case $basic_machine in
 		basic_machine=v70-nec
 		os=-sysv
 		;;
-	next | m*-next )
+	next | m*-next)
 		basic_machine=m68k-next
 		case $os in
 		    -nextstep* )
@@ -906,6 +940,12 @@ case $basic_machine in
 	nsr-tandem)
 		basic_machine=nsr-tandem
 		;;
+	nsv-tandem)
+		basic_machine=nsv-tandem
+		;;
+	nsx-tandem)
+		basic_machine=nsx-tandem
+		;;
 	op50n-* | op60c-*)
 		basic_machine=hppa1.1-oki
 		os=-proelf
@@ -938,7 +978,7 @@ case $basic_machine in
 		os=-linux
 		;;
 	parisc-*)
-		basic_machine=hppa-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=hppa-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		os=-linux
 		;;
 	pbd)
@@ -954,7 +994,7 @@ case $basic_machine in
 		basic_machine=i386-pc
 		;;
 	pc98-*)
-		basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=i386-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	pentium | p5 | k5 | k6 | nexgen | viac3)
 		basic_machine=i586-pc
@@ -969,16 +1009,16 @@ case $basic_machine in
 		basic_machine=i786-pc
 		;;
 	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
-		basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=i586-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	pentiumpro-* | p6-* | 6x86-* | athlon-*)
-		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
-		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=i686-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	pentium4-*)
-		basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=i786-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	pn)
 		basic_machine=pn-gould
@@ -988,23 +1028,23 @@ case $basic_machine in
 	ppc | ppcbe)	basic_machine=powerpc-unknown
 		;;
 	ppc-* | ppcbe-*)
-		basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=powerpc-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
-	ppcle | powerpclittle | ppc-le | powerpc-little)
+	ppcle | powerpclittle)
 		basic_machine=powerpcle-unknown
 		;;
 	ppcle-* | powerpclittle-*)
-		basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=powerpcle-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	ppc64)	basic_machine=powerpc64-unknown
 		;;
-	ppc64-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'`
+	ppc64-*) basic_machine=powerpc64-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
-	ppc64le | powerpc64little | ppc64-le | powerpc64-little)
+	ppc64le | powerpc64little)
 		basic_machine=powerpc64le-unknown
 		;;
 	ppc64le-* | powerpc64little-*)
-		basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=powerpc64le-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	ps2)
 		basic_machine=i386-ibm
@@ -1013,7 +1053,11 @@ case $basic_machine in
 		basic_machine=i586-unknown
 		os=-pw32
 		;;
-	rdos)
+	rdos | rdos64)
+		basic_machine=x86_64-pc
+		os=-rdos
+		;;
+	rdos32)
 		basic_machine=i386-pc
 		os=-rdos
 		;;
@@ -1054,17 +1098,10 @@ case $basic_machine in
 	sequent)
 		basic_machine=i386-sequent
 		;;
-	sh)
-		basic_machine=sh-hitachi
-		os=-hms
-		;;
 	sh5el)
 		basic_machine=sh5le-unknown
 		;;
-	sh64)
-		basic_machine=sh64-unknown
-		;;
-	sparclite-wrs | simso-wrs)
+	simso-wrs)
 		basic_machine=sparclite-wrs
 		os=-vxworks
 		;;
@@ -1083,7 +1120,7 @@ case $basic_machine in
 		os=-sysv4
 		;;
 	strongarm-* | thumb-*)
-		basic_machine=arm-`echo $basic_machine | sed 's/^[^-]*-//'`
+		basic_machine=arm-`echo "$basic_machine" | sed 's/^[^-]*-//'`
 		;;
 	sun2)
 		basic_machine=m68000-sun
@@ -1205,6 +1242,9 @@ case $basic_machine in
 		basic_machine=hppa1.1-winbond
 		os=-proelf
 		;;
+	x64)
+		basic_machine=x86_64-pc
+		;;
 	xbox)
 		basic_machine=i686-pc
 		os=-mingw32
@@ -1213,20 +1253,12 @@ case $basic_machine in
 		basic_machine=xps100-honeywell
 		;;
 	xscale-* | xscalee[bl]-*)
-		basic_machine=`echo $basic_machine | sed 's/^xscale/arm/'`
+		basic_machine=`echo "$basic_machine" | sed 's/^xscale/arm/'`
 		;;
 	ymp)
 		basic_machine=ymp-cray
 		os=-unicos
 		;;
-	z8k-*-coff)
-		basic_machine=z8k-unknown
-		os=-sim
-		;;
-	z80-*-coff)
-		basic_machine=z80-unknown
-		os=-sim
-		;;
 	none)
 		basic_machine=none-none
 		os=-none
@@ -1255,10 +1287,6 @@ case $basic_machine in
 	vax)
 		basic_machine=vax-dec
 		;;
-	pdp10)
-		# there are many clones, so DEC is not a safe bet
-		basic_machine=pdp10-unknown
-		;;
 	pdp11)
 		basic_machine=pdp11-dec
 		;;
@@ -1268,9 +1296,6 @@ case $basic_machine in
 	sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele)
 		basic_machine=sh-unknown
 		;;
-	sparc | sparcv8 | sparcv9 | sparcv9b | sparcv9v)
-		basic_machine=sparc-sun
-		;;
 	cydra)
 		basic_machine=cydra-cydrome
 		;;
@@ -1290,7 +1315,7 @@ case $basic_machine in
 		# Make sure to match an already-canonicalized machine name.
 		;;
 	*)
-		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		echo Invalid configuration \`"$1"\': machine \`"$basic_machine"\' not recognized 1>&2
 		exit 1
 		;;
 esac
@@ -1298,10 +1323,10 @@ esac
 # Here we canonicalize certain aliases for manufacturers.
 case $basic_machine in
 	*-digital*)
-		basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
+		basic_machine=`echo "$basic_machine" | sed 's/digital.*/dec/'`
 		;;
 	*-commodore*)
-		basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
+		basic_machine=`echo "$basic_machine" | sed 's/commodore.*/cbm/'`
 		;;
 	*)
 		;;
@@ -1312,8 +1337,8 @@ esac
 if [ x"$os" != x"" ]
 then
 case $os in
-	# First match some system type aliases
-	# that might get confused with valid system types.
+	# First match some system type aliases that might get confused
+	# with valid system types.
 	# -solaris* is a basic system type, with this one exception.
 	-auroraux)
 		os=-auroraux
@@ -1324,45 +1349,48 @@ case $os in
 	-solaris)
 		os=-solaris2
 		;;
-	-svr4*)
-		os=-sysv4
-		;;
 	-unixware*)
 		os=-sysv4.2uw
 		;;
 	-gnu/linux*)
 		os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
 		;;
-	# First accept the basic system types.
+	# es1800 is here to avoid being matched by es* (a different OS)
+	-es1800*)
+		os=-ose
+		;;
+	# Now accept the basic system types.
 	# The portable systems comes first.
-	# Each alternative MUST END IN A *, to match a version number.
+	# Each alternative MUST end in a * to match a version number.
 	# -sysv* is not here because it comes later, after sysvr4.
 	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
 	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
-	      | -sym* | -kopensolaris* \
+	      | -sym* | -kopensolaris* | -plan9* \
 	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
-	      | -aos* | -aros* \
+	      | -aos* | -aros* | -cloudabi* | -sortix* \
 	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
 	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
-	      | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
-	      | -openbsd* | -solidbsd* \
+	      | -hiux* | -knetbsd* | -mirbsd* | -netbsd* \
+	      | -bitrig* | -openbsd* | -solidbsd* | -libertybsd* \
 	      | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
 	      | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
-	      | -chorusos* | -chorusrdb* | -cegcc* \
+	      | -chorusos* | -chorusrdb* | -cegcc* | -glidix* \
 	      | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-	      | -mingw32* | -linux-gnu* | -linux-android* \
-	      | -linux-newlib* | -linux-uclibc* \
-	      | -uxpv* | -beos* | -mpeix* | -udk* \
-	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
+	      | -midipix* | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \
+	      | -linux-newlib* | -linux-musl* | -linux-uclibc* \
+	      | -uxpv* | -beos* | -mpeix* | -udk* | -moxiebox* \
+	      | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* \
 	      | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
 	      | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
 	      | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
-	      | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
+	      | -morphos* | -superux* | -rtmk* | -windiss* \
 	      | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
-	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es*)
+	      | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
+	      | -onefs* | -tirtos* | -phoenix* | -fuchsia* | -redox* | -bme* \
+	      | -midnightbsd*)
 	# Remember, each alternative MUST END IN *, to match a version number.
 		;;
 	-qnx*)
@@ -1379,12 +1407,12 @@ case $os in
 	-nto*)
 		os=`echo $os | sed -e 's|nto|nto-qnx|'`
 		;;
-	-sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
-	      | -windows* | -osx | -abug | -netware* | -os9* | -beos* | -haiku* \
+	-sim | -xray | -os68k* | -v88r* \
+	      | -windows* | -osx | -abug | -netware* | -os9* \
 	      | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
 		;;
 	-mac*)
-		os=`echo $os | sed -e 's|mac|macos|'`
+		os=`echo "$os" | sed -e 's|mac|macos|'`
 		;;
 	-linux-dietlibc)
 		os=-linux-dietlibc
@@ -1393,10 +1421,10 @@ case $os in
 		os=`echo $os | sed -e 's|linux|linux-gnu|'`
 		;;
 	-sunos5*)
-		os=`echo $os | sed -e 's|sunos5|solaris2|'`
+		os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
 		;;
 	-sunos6*)
-		os=`echo $os | sed -e 's|sunos6|solaris3|'`
+		os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
 		;;
 	-opened*)
 		os=-openedition
@@ -1407,12 +1435,6 @@ case $os in
 	-wince*)
 		os=-wince
 		;;
-	-osfrose*)
-		os=-osfrose
-		;;
-	-osf*)
-		os=-osf
-		;;
 	-utek*)
 		os=-bsd
 		;;
@@ -1437,7 +1459,7 @@ case $os in
 	-nova*)
 		os=-rtmk-nova
 		;;
-	-ns2 )
+	-ns2)
 		os=-nextstep2
 		;;
 	-nsk*)
@@ -1459,7 +1481,7 @@ case $os in
 	-oss*)
 		os=-sysv3
 		;;
-	-svr4)
+	-svr4*)
 		os=-sysv4
 		;;
 	-svr3)
@@ -1474,35 +1496,38 @@ case $os in
 	-ose*)
 		os=-ose
 		;;
-	-es1800*)
-		os=-ose
-		;;
-	-xenix)
-		os=-xenix
-		;;
 	-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
 		os=-mint
 		;;
-	-aros*)
-		os=-aros
-		;;
-	-kaos*)
-		os=-kaos
-		;;
 	-zvmoe)
 		os=-zvmoe
 		;;
 	-dicos*)
 		os=-dicos
 		;;
+	-pikeos*)
+		# Until real need of OS specific support for
+		# particular features comes up, bare metal
+		# configurations are quite functional.
+		case $basic_machine in
+		    arm*)
+			os=-eabi
+			;;
+		    *)
+			os=-elf
+			;;
+		esac
+		;;
 	-nacl*)
 		;;
+	-ios)
+		;;
 	-none)
 		;;
 	*)
 		# Get rid of the `-' at the beginning of $os.
 		os=`echo $os | sed 's/[^-]*-//'`
-		echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
+		echo Invalid configuration \`"$1"\': system \`"$os"\' not recognized 1>&2
 		exit 1
 		;;
 esac
@@ -1537,6 +1562,12 @@ case $basic_machine in
 	c4x-* | tic4x-*)
 		os=-coff
 		;;
+	c8051-*)
+		os=-elf
+		;;
+	hexagon-*)
+		os=-elf
+		;;
 	tic54x-*)
 		os=-coff
 		;;
@@ -1586,12 +1617,12 @@ case $basic_machine in
 	sparc-* | *-sun)
 		os=-sunos4.1.1
 		;;
+	pru-*)
+		os=-elf
+		;;
 	*-be)
 		os=-beos
 		;;
-	*-haiku)
-		os=-haiku
-		;;
 	*-ibm)
 		os=-aix
 		;;
@@ -1631,7 +1662,7 @@ case $basic_machine in
 	m88k-omron*)
 		os=-luna
 		;;
-	*-next )
+	*-next)
 		os=-nextstep
 		;;
 	*-sequent)
@@ -1646,9 +1677,6 @@ case $basic_machine in
 	i370-*)
 		os=-mvs
 		;;
-	*-next)
-		os=-nextstep3
-		;;
 	*-gould)
 		os=-sysv
 		;;
@@ -1758,15 +1786,15 @@ case $basic_machine in
 				vendor=stratus
 				;;
 		esac
-		basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
+		basic_machine=`echo "$basic_machine" | sed "s/unknown/$vendor/"`
 		;;
 esac

-echo $basic_machine$os
+echo "$basic_machine$os"
 exit

 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'write-file-functions 'time-stamp)
 # time-stamp-start: "timestamp='"
 # time-stamp-format: "%:y-%02m-%02d"
 # time-stamp-end: "'"
--- a/15249
+++ b/15249
--- a/configure.ac
+++ b/configure.ac
@@ -2,8 +2,9 @@
 AC_INIT(libssh2, [-], libssh2-devel@cool.haxx.se)
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src])
-AC_CONFIG_HEADERS([src/libssh2_config.h example/libssh2_config.h])
+AC_CONFIG_HEADERS([src/libssh2_config.h])
 AM_MAINTAINER_MODE
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

 dnl SED is needed by some of the tools
 AC_PATH_PROG( SED, sed, sed-was-not-found-by-configure,
@@ -35,12 +36,9 @@ case "$host" in
    CFLAGS="$CFLAGS -DLIBSSH2_WIN32"
    LIBS="$LIBS -lws2_32"
    ;;
-	*-cygwin)
-	CFLAGS="$CFLAGS -DLIBSSH2_WIN32"
+    *darwin*)
+    CFLAGS="$CFLAGS -DLIBSSH2_DARWIN"
    ;;
-	*darwin*)
-	CFLAGS="$CFLAGS -DLIBSSH2_DARWIN"
-	;;
    *hpux*)
    ;;
    *osf*)
@@ -68,6 +66,7 @@ AC_SEARCH_LIBS(inet_addr, nsl)
 AC_SUBST(LIBS)

 AC_PROG_CC
+AC_PROG_CXX
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
@@ -82,105 +81,76 @@ AC_C_BIGENDIAN
 dnl check for how to do large files
 AC_SYS_LARGEFILE

-# Configure parameters
-AC_ARG_WITH(openssl,
-  AC_HELP_STRING([--with-openssl],[Use OpenSSL for crypto]),
-  use_openssl=$withval,use_openssl=auto)
-AC_ARG_WITH(libgcrypt,
-  AC_HELP_STRING([--with-libgcrypt],[Use libgcrypt for crypto]),
-  use_libgcrypt=$withval,use_libgcrypt=auto)
-AC_ARG_WITH(wincng,
-  AC_HELP_STRING([--with-wincng],[Use Windows CNG for crypto]),
-  use_wincng=$withval,use_wincng=auto)
-AC_ARG_WITH(libz,
-  AC_HELP_STRING([--with-libz],[Use zlib for compression]),
-  use_libz=$withval,use_libz=auto)
+# Crypto backends

 found_crypto=none
+found_crypto_str=""
 support_clear_memory=no
+crypto_errors=""

-# Look for OpenSSL
-if test "$found_crypto" = "none" && test "$use_openssl" != "no"; then
-  AC_LIB_HAVE_LINKFLAGS([ssl], [crypto], [#include <openssl/ssl.h>])
-fi
-if test "$ac_cv_libssl" = "yes"; then
-  AC_DEFINE(LIBSSH2_OPENSSL, 1, [Use OpenSSL])
-  LIBSREQUIRED=libssl,libcrypto
+m4_set_add([crypto_backends], [openssl])
+m4_set_add([crypto_backends], [libgcrypt])
+m4_set_add([crypto_backends], [mbedtls])
+m4_set_add([crypto_backends], [wincng])

-  # Not all OpenSSL have AES-CTR functions.
-  save_LIBS="$LIBS"
-  LIBS="$LIBS $LIBSSL"
-  AC_CHECK_FUNCS(EVP_aes_128_ctr)
-  LIBS="$save_LIBS"
+AC_ARG_WITH([crypto],
+  AC_HELP_STRING([--with-crypto=auto|]m4_set_contents([crypto_backends], [|]),
+    [Select crypto backend (default: auto)]),
+  use_crypto=$withval,
+  use_crypto=auto
+)

-  found_crypto="OpenSSL (AES-CTR: ${ac_cv_func_EVP_aes_128_ctr:-N/A})"
-fi
-AM_CONDITIONAL(OPENSSL, test "$ac_cv_libssl" = "yes")
+case "${use_crypto}" in
+  auto|m4_set_contents([crypto_backends], [|]))
+    m4_set_map([crypto_backends], [LIBSSH2_CHECK_CRYPTO])
+    ;;
+  yes|"")
+    crypto_errors="No crypto backend specified!"
+    ;;
+  *)
+    crypto_errors="Unknown crypto backend '${use_crypto}' specified!"
+    ;;
+esac

-# Look for libgcrypt
-if test "$found_crypto" = "none" && test "$use_libgcrypt" != "no"; then
-  AC_LIB_HAVE_LINKFLAGS([gcrypt], [], [#include <gcrypt.h>])
-fi
-if test "$ac_cv_libgcrypt" = "yes"; then
-  AC_DEFINE(LIBSSH2_LIBGCRYPT, 1, [Use libgcrypt])
-  LIBSREQUIRED= # libgcrypt doesn't provide a .pc file. sad face.
-  LIBS="$LIBS -lgcrypt"
-  found_crypto=libgcrypt
-fi
-AM_CONDITIONAL(LIBGCRYPT, test "$ac_cv_libgcrypt" = "yes")
-
-# Look for Windows Cryptography API: Next Generation
-if test "$found_crypto" = "none" && test "$use_wincng" != "no"; then
-  AC_LIB_HAVE_LINKFLAGS([bcrypt], [], [
-    #include <windows.h>
-    #include <bcrypt.h>
-  ])
-  AC_LIB_HAVE_LINKFLAGS([crypt32], [], [
-    #include <windows.h>
-    #include <wincrypt.h>
-  ])
-  AC_CHECK_HEADERS([ntdef.h ntstatus.h], [], [], [
-    #include <windows.h>
-  ])
-  AC_CHECK_DECLS([SecureZeroMemory], [], [], [
-    #include <windows.h>
-  ])
-fi
-if test "$ac_cv_libbcrypt" = "yes"; then
-  AC_DEFINE(LIBSSH2_WINCNG, 1, [Use Windows CNG])
-  LIBSREQUIRED= # wincng doesn't provide a .pc file. sad face.
-  LIBS="$LIBS -lbcrypt"
-  if test "$ac_cv_libcrypt32" = "yes"; then
-    LIBS="$LIBS -lcrypt32"
-  fi
-  found_crypto="Windows Cryptography API: Next Generation"
-  if test "$ac_cv_have_decl_SecureZeroMemory" = "yes"; then
-    support_clear_memory=yes
-  fi
-fi
-AM_CONDITIONAL(WINCNG, test "$ac_cv_libbcrypt" = "yes")
-
-# Check if crypto library was found
 if test "$found_crypto" = "none"; then
-  AC_MSG_ERROR([No crypto library found!
-Try --with-libssl-prefix=PATH
- or --with-libgcrypt-prefix=PATH
- or --with-wincng on Windows\
-])
+  crypto_errors="${crypto_errors}
+Specify --with-crypto=\$backend and/or the neccessary library search prefix.
+
+Known crypto backends: auto, m4_set_contents([crypto_backends], [, ])"
+  AS_MESSAGE([ERROR: ${crypto_errors}])
+else
+  test "$found_crypto_str" = "" && found_crypto_str="$found_crypto"
 fi

-# Look for Libz
-if test "$use_libz" != "no"; then
+m4_set_foreach([crypto_backends], [backend],
+  [AM_CONDITIONAL(m4_toupper(backend), test "$found_crypto" = "backend")]
+)
+
+# libz
+
+AC_ARG_WITH([libz],
+  AC_HELP_STRING([--with-libz],[Use libz for compression]),
+  use_libz=$withval,
+  use_libz=auto)
+
+found_libz=no
+libz_errors=""
+
+if test "$use_libz" != no; then
  AC_LIB_HAVE_LINKFLAGS([z], [], [#include <zlib.h>])
  if test "$ac_cv_libz" != yes; then
-    AC_MSG_NOTICE([Cannot find zlib, disabling compression])
-    AC_MSG_NOTICE([Try --with-libz-prefix=PATH if you know you have it])
+    if test "$use_libz" = auto; then
+      AC_MSG_NOTICE([Cannot find libz, disabling compression])
+      found_libz="disabled; no libz found"
+    else
+      libz_errors="No libz found!
+Try --with-libz-prefix=PATH if you know that you have it."
+      AS_MESSAGE([ERROR: $libz_errors])
+    fi
  else
    AC_DEFINE(LIBSSH2_HAVE_ZLIB, 1, [Compile in zlib support])
-    if test "${LIBSREQUIRED}" != ""; then
-      LIBSREQUIRED="${LIBSREQUIRED},"
-    fi
-    LIBSREQUIRED="${LIBSREQUIRED}zlib"
+    LIBSREQUIRED="$LIBSREQUIRED${LIBSREQUIRED:+ }zlib"
+    found_libz="yes"
  fi
 fi

@@ -238,6 +208,7 @@ AC_HELP_STRING([--disable-debug],[Disable debug options]),
 [ case "$enable_debug" in
  no)
       AC_MSG_RESULT(no)
+       CPPFLAGS="$CPPFLAGS -DNDEBUG"
       ;;
  *)   AC_MSG_RESULT(yes)
    enable_debug=yes
@@ -309,6 +280,21 @@ esac], [build_examples='yes'])
 AC_MSG_RESULT($build_examples)
 AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != "xno"])

+
+# Build OSS fuzzing targets?
+AC_ARG_ENABLE([ossfuzzers],
+  [AS_HELP_STRING([--enable-ossfuzzers],
+    [Whether to generate the fuzzers for OSS-Fuzz])],
+  [have_ossfuzzers=yes], [have_ossfuzzers=no])
+AM_CONDITIONAL([USE_OSSFUZZERS], [test "x$have_ossfuzzers" = "xyes"])
+
+
+# Set the correct flags for the given fuzzing engine.
+AC_SUBST([LIB_FUZZING_ENGINE])
+AM_CONDITIONAL([USE_OSSFUZZ_FLAG], [test "x$LIB_FUZZING_ENGINE" = "x-fsanitize=fuzzer"])
+AM_CONDITIONAL([USE_OSSFUZZ_STATIC], [test -f "$LIB_FUZZING_ENGINE"])
+
+
 # Checks for header files.
 # AC_HEADER_STDC
 AC_CHECK_HEADERS([errno.h fcntl.h stdio.h stdlib.h unistd.h sys/uio.h])
@@ -344,7 +330,7 @@ case $host in
    ;;
 esac

-AC_CHECK_FUNCS(gettimeofday select strtoll)
+AC_CHECK_FUNCS(gettimeofday select strtoll memset_s)

 dnl Check for select() into ws2_32 for Msys/Mingw
 if test "$ac_cv_func_select" != "yes"; then
@@ -376,9 +362,29 @@ AC_C_INLINE

 CURL_CHECK_NONBLOCKING_SOCKET

+missing_required_deps=0
+
+if test "${libz_errors}" != ""; then
+  AS_MESSAGE([ERROR: ${libz_errors}])
+  missing_required_deps=1
+fi
+
+if test "$found_crypto" = "none"; then
+  AS_MESSAGE([ERROR: ${crypto_errors}])
+  missing_required_deps=1
+fi
+
+if test $missing_required_deps = 1; then
+  AC_MSG_ERROR([Required dependencies are missing!])
+fi
+
+# Configure parameters
+LIBSSH2_CHECK_OPTION_WERROR
+
 AC_CONFIG_FILES([Makefile
                 src/Makefile
                 tests/Makefile
+                 tests/ossfuzz/Makefile
                 example/Makefile
                 docs/Makefile
                 libssh2.pc])
@@ -392,10 +398,10 @@ AC_MSG_NOTICE([summary of build options:
  Compiler:         ${CC}
  Compiler flags:   ${CFLAGS}
  Library types:    Shared=${enable_shared}, Static=${enable_static}
-  Crypto library:   ${found_crypto}
+  Crypto library:   ${found_crypto_str}
  Clear memory:     $enable_clear_memory
  Debug build:      $enable_debug
  Build examples:   $build_examples
  Path to sshd:     $ac_cv_path_SSHD (only for self-tests)
-  zlib compression: $ac_cv_libz
+  zlib compression: ${found_libz}
 ])
--- a/635
+++ b/635
@@ -1,9 +1,9 @@
 #! /bin/sh
 # depcomp - compile a program generating dependencies as side-effects

-scriptversion=2005-07-09.11
+scriptversion=2018-03-07.03; # UTC

-# Copyright (C) 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 1999-2020 Free Software Foundation, Inc.

 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,9 +16,7 @@ scriptversion=2005-07-09.11
 # GNU General Public License for more details.

 # You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.

 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@@ -29,9 +27,9 @@ scriptversion=2005-07-09.11

 case $1 in
  '')
-     echo "$0: No command.  Try \`$0 --help' for more information." 1>&2
-     exit 1;
-     ;;
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
+    exit 1;
+    ;;
  -h | --h*)
    cat <<\EOF
 Usage: depcomp [--help] [--version] PROGRAM [ARGS]
@@ -41,11 +39,11 @@ as side-effects.

 Environment variables:
  depmode     Dependency tracking mode.
-  source      Source file read by `PROGRAMS ARGS'.
-  object      Object file output by `PROGRAMS ARGS'.
+  source      Source file read by 'PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
  DEPDIR      directory where to store dependencies.
  depfile     Dependency file to output.
-  tmpdepfile  Temporary file to use when outputing dependencies.
+  tmpdepfile  Temporary file to use when outputting dependencies.
  libtool     Whether libtool is used (yes/no).

 Report bugs to <bug-automake@gnu.org>.
@@ -58,6 +56,66 @@ EOF
    ;;
 esac

+# Get the directory component of the given path, and save it in the
+# global variables '$dir'.  Note that this directory component will
+# be either empty or ending with a '/' character.  This is deliberate.
+set_dir_from ()
+{
+  case $1 in
+    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
+      *) dir=;;
+  esac
+}
+
+# Get the suffix-stripped basename of the given path, and save it the
+# global variable '$base'.
+set_base_from ()
+{
+  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
+}
+
+# If no dependency file was actually created by the compiler invocation,
+# we still have to create a dummy depfile, to avoid errors with the
+# Makefile "include basename.Plo" scheme.
+make_dummy_depfile ()
+{
+  echo "#dummy" > "$depfile"
+}
+
+# Factor out some common post-processing of the generated depfile.
+# Requires the auxiliary global variable '$tmpdepfile' to be set.
+aix_post_process_depfile ()
+{
+  # If the compiler actually managed to produce a dependency file,
+  # post-process it.
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form 'foo.o: dependency.h'.
+    # Do two passes, one to just change these to
+    #   $object: dependency.h
+    # and one to simply output
+    #   dependency.h:
+    # which is needed to avoid the deleted-header problem.
+    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
+      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
+    } > "$depfile"
+    rm -f "$tmpdepfile"
+  else
+    make_dummy_depfile
+  fi
+}
+
+# A tabulation character.
+tab='	'
+# A newline character.
+nl='
+'
+# Character ranges might be problematic outside the C locale.
+# These definitions help.
+upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
+lower=abcdefghijklmnopqrstuvwxyz
+digits=0123456789
+alpha=${upper}${lower}
+
 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
  echo "depcomp: Variables source, object and depmode must be set" 1>&2
  exit 1
@@ -70,6 +128,9 @@ tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}

 rm -f "$tmpdepfile"

+# Avoid interferences from the environment.
+gccflag= dashmflag=
+
 # Some modes work just like other modes, but use different flags.  We
 # parameterize here, but still list the modes in the big case below,
 # to make depend.m4 easier to write.  Note that we *cannot* use a case
@@ -81,9 +142,32 @@ if test "$depmode" = hp; then
 fi

 if test "$depmode" = dashXmstdout; then
-   # This is just like dashmstdout with a different argument.
-   dashmflag=-xM
-   depmode=dashmstdout
+  # This is just like dashmstdout with a different argument.
+  dashmflag=-xM
+  depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+  # This is just like msvisualcpp but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvisualcpp
+fi
+
+if test "$depmode" = msvc7msys; then
+  # This is just like msvc7 but w/o cygpath translation.
+  # Just convert the backslash-escaped backslashes to single forward
+  # slashes to satisfy depend.m4
+  cygpath_u='sed s,\\\\,/,g'
+  depmode=msvc7
+fi
+
+if test "$depmode" = xlc; then
+  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
+  gccflag=-qmakedep=gcc,-MF
+  depmode=gcc
 fi

 case "$depmode" in
@@ -91,10 +175,22 @@ gcc3)
 ## gcc 3 implements dependency tracking that does exactly what
 ## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
 ## it if -MD -MP comes after the -MF stuff.  Hmm.
-  "$@" -MT "$object" -MD -MP -MF "$tmpdepfile"
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
  stat=$?
-  if test $stat -eq 0; then :
-  else
+  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
@@ -102,13 +198,17 @@ gcc3)
  ;;

 gcc)
+## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
+## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
+## (see the conditional assignment to $gccflag above).
 ## There are various ways to get dependency output from gcc.  Here's
 ## why we pick this rather obscure method:
 ## - Don't want to use -MD because we'd like the dependencies to end
 ##   up in a subdir.  Having to rename by hand is ugly.
 ##   (We might end up doing this anyway to support other compilers.)
 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
-##   -MM, not -M (despite what the docs say).
+##   -MM, not -M (despite what the docs say).  Also, it might not be
+##   supported by the other compilers which use the 'gcc' depmode.
 ## - Using -M directly means running the compiler twice (even worse
 ##   than renaming).
  if test -z "$gccflag"; then
@@ -116,31 +216,31 @@ gcc)
  fi
  "$@" -Wp,"$gccflag$tmpdepfile"
  stat=$?
-  if test $stat -eq 0; then :
-  else
+  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
-  alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
-## The second -e expression handles DOS-style file names with drive letters.
+  # The second -e expression handles DOS-style file names with drive
+  # letters.
  sed -e 's/^[^:]*: / /' \
      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
-## This next piece of magic avoids the `deleted header file' problem.
+## This next piece of magic avoids the "deleted header file" problem.
 ## The problem is that when a header file which appears in a .P file
 ## is deleted, the dependency causes make to die (because there is
 ## typically no way to rebuild the header).  We avoid this by adding
 ## dummy dependencies for each header file.  Too bad gcc doesn't do
 ## this for us directly.
-  tr ' ' '
-' < "$tmpdepfile" |
-## Some versions of gcc put a space before the `:'.  On the theory
+## Some versions of gcc put a space before the ':'.  On the theory
 ## that the space means something, we add a space to the output as
-## well.
+## well.  hp depmode also adds that space, but also prefixes the VPATH
+## to the object.  Take care to not repeat it in the output.
 ## Some versions of the HPUX 10.20 sed can't process this invocation
 ## correctly.  Breaking it into two sed invocations is a workaround.
-    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;

@@ -158,8 +258,7 @@ sgi)
    "$@" -MDupdate "$tmpdepfile"
  fi
  stat=$?
-  if test $stat -eq 0; then :
-  else
+  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
@@ -167,99 +266,156 @@ sgi)

  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
    echo "$object : \\" > "$depfile"
-
    # Clip off the initial element (the dependent).  Don't try to be
    # clever and replace this with sed code, as IRIX sed won't handle
    # lines with more than a fixed number of characters (4096 in
    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
-    # the IRIX cc adds comments like `#:fec' to the end of the
+    # the IRIX cc adds comments like '#:fec' to the end of the
    # dependency line.
-    tr ' ' '
-' < "$tmpdepfile" \
-    | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \
-    tr '
-' ' ' >> $depfile
-    echo >> $depfile
-
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
+      | tr "$nl" ' ' >> "$depfile"
+    echo >> "$depfile"
    # The second pass generates a dummy entry for each header file.
-    tr ' ' '
-' < "$tmpdepfile" \
-   | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
-   >> $depfile
+    tr ' ' "$nl" < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
  else
-    # The sourcefile does not contain any dependencies, so just
-    # store a dummy comment line, to avoid errors with the Makefile
-    # "include basename.Plo" scheme.
-    echo "#dummy" > "$depfile"
+    make_dummy_depfile
  fi
  rm -f "$tmpdepfile"
  ;;

+xlc)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
 aix)
  # The C for AIX Compiler uses -M and outputs the dependencies
  # in a .u file.  In older versions, this file always lives in the
-  # current directory.  Also, the AIX compiler puts `$object:' at the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
  # start of each line; $object doesn't have directory information.
  # Version 6 uses the directory in both cases.
-  stripped=`echo "$object" | sed 's/\(.*\)\..*$/\1/'`
-  tmpdepfile="$stripped.u"
+  set_dir_from "$object"
+  set_base_from "$object"
  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
    "$@" -Wc,-M
  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
    "$@" -M
  fi
  stat=$?
-
-  if test -f "$tmpdepfile"; then :
-  else
-    stripped=`echo "$stripped" | sed 's,^.*/,,'`
-    tmpdepfile="$stripped.u"
-  fi
-
-  if test $stat -eq 0; then :
-  else
-    rm -f "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
    exit $stat
  fi

-  if test -f "$tmpdepfile"; then
-    outname="$stripped.o"
-    # Each line is of the form `foo.o: dependent.h'.
-    # Do two passes, one to just change these to
-    # `$object: dependent.h' and one to simply `dependent.h:'.
-    sed -e "s,^$outname:,$object :," < "$tmpdepfile" > "$depfile"
-    sed -e "s,^$outname: \(.*\)$,\1:," < "$tmpdepfile" >> "$depfile"
-  else
-    # The sourcefile does not contain any dependencies, so just
-    # store a dummy comment line, to avoid errors with the Makefile
-    # "include basename.Plo" scheme.
-    echo "#dummy" > "$depfile"
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  aix_post_process_depfile
+  ;;
+
+tcc)
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
+  # FIXME: That version still under development at the moment of writing.
+  #        Make that this statement remains true also for stable, released
+  #        versions.
+  # It will wrap lines (doesn't matter whether long or short) with a
+  # trailing '\', as in:
+  #
+  #   foo.o : \
+  #    foo.c \
+  #    foo.h \
+  #
+  # It will put a trailing '\' even on the last line, and will use leading
+  # spaces rather than leading tabs (at least since its commit 0394caf7
+  # "Emit spaces for -MD").
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
  fi
+  rm -f "$depfile"
+  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
+  # We have to change lines of the first kind to '$object: \'.
+  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
+  # And for each line of the second kind, we have to emit a 'dep.h:'
+  # dummy dependency, to avoid the deleted-header problem.
+  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
  rm -f "$tmpdepfile"
  ;;

-icc)
-  # Intel's C compiler understands `-MD -MF file'.  However on
-  #    icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c
-  # ICC 7.0 will fill foo.d with something like
-  #    foo.o: sub/foo.c
-  #    foo.o: sub/foo.h
-  # which is wrong.  We want:
-  #    sub/foo.o: sub/foo.c
-  #    sub/foo.o: sub/foo.h
-  #    sub/foo.c:
-  #    sub/foo.h:
-  # ICC 7.1 will output
+## The order of this option in the case statement is important, since the
+## shell code in configure will try each of these formats in the order
+## listed in this file.  A plain '-MD' option would be understood by many
+## compilers, so we must ensure this comes after the gcc and icc options.
+pgcc)
+  # Portland's C compiler understands '-MD'.
+  # Will always output deps to 'file.d' where file is the root name of the
+  # source file under compilation, even if file resides in a subdirectory.
+  # The object file name does not affect the name of the '.d' file.
+  # pgcc 10.2 will output
  #    foo.o: sub/foo.c sub/foo.h
-  # and will wrap long lines using \ :
+  # and will wrap long lines using '\' :
  #    foo.o: sub/foo.c ... \
  #     sub/foo.h ... \
  #     ...
+  set_dir_from "$object"
+  # Use the source, not the object, to determine the base name, since
+  # that's sadly what pgcc will do too.
+  set_base_from "$source"
+  tmpdepfile=$base.d

-  "$@" -MD -MF "$tmpdepfile"
-  stat=$?
-  if test $stat -eq 0; then :
-  else
+  # For projects that build the same source file twice into different object
+  # files, the pgcc approach of using the *source* file root name can cause
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
+  # the same $tmpdepfile.
+  lockdir=$base.d-lock
+  trap "
+    echo '$0: caught signal, cleaning up...' >&2
+    rmdir '$lockdir'
+    exit 1
+  " 1 2 13 15
+  numtries=100
+  i=$numtries
+  while test $i -gt 0; do
+    # mkdir is a portable test-and-set.
+    if mkdir "$lockdir" 2>/dev/null; then
+      # This process acquired the lock.
+      "$@" -MD
+      stat=$?
+      # Release the lock.
+      rmdir "$lockdir"
+      break
+    else
+      # If the lock is being held by a different process, wait
+      # until the winning process is done or we timeout.
+      while test -d "$lockdir" && test $i -gt 0; do
+        sleep 1
+        i=`expr $i - 1`
+      done
+    fi
+    i=`expr $i - 1`
+  done
+  trap - 1 2 13 15
+  if test $i -le 0; then
+    echo "$0: failed to acquire lock after $numtries attempts" >&2
+    echo "$0: check lockdir '$lockdir'" >&2
+    exit 1
+  fi
+
+  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
@@ -271,68 +427,141 @@ icc)
  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
  # Some versions of the HPUX 10.20 sed can't process this invocation
  # correctly.  Breaking it into two sed invocations is a workaround.
-  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" |
-    sed -e 's/$/ :/' >> "$depfile"
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
+    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;

+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  set_dir_from  "$object"
+  set_base_from "$object"
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -ne 0; then
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add 'dependent.h:' lines.
+    sed -ne '2,${
+               s/^ *//
+               s/ \\*$//
+               s/$/:/
+               p
+             }' "$tmpdepfile" >> "$depfile"
+  else
+    make_dummy_depfile
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
 tru64)
-   # The Tru64 compiler uses -MD to generate dependencies as a side
-   # effect.  `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'.
-   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
-   # dependencies in `foo.d' instead, so we check for that too.
-   # Subdirectories are respected.
-   dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
-   test "x$dir" = "x$object" && dir=
-   base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+  # The Tru64 compiler uses -MD to generate dependencies as a side
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # dependencies in 'foo.d' instead, so we check for that too.
+  # Subdirectories are respected.
+  set_dir_from  "$object"
+  set_base_from "$object"

-   if test "$libtool" = yes; then
-      # With Tru64 cc, shared objects can also be used to make a
-      # static library.  This mecanism is used in libtool 1.4 series to
-      # handle both shared and static libraries in a single compilation.
-      # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
-      #
-      # With libtool 1.5 this exception was removed, and libtool now
-      # generates 2 separate objects for the 2 libraries.  These two
-      # compilations output dependencies in in $dir.libs/$base.o.d and
-      # in $dir$base.o.d.  We have to check for both files, because
-      # one of the two compilations can be disabled.  We should prefer
-      # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
-      # automatically cleaned when .libs/ is deleted, while ignoring
-      # the former would cause a distcleancheck panic.
-      tmpdepfile1=$dir.libs/$base.lo.d   # libtool 1.4
-      tmpdepfile2=$dir$base.o.d          # libtool 1.5
-      tmpdepfile3=$dir.libs/$base.o.d    # libtool 1.5
-      tmpdepfile4=$dir.libs/$base.d      # Compaq CCC V6.2-504
-      "$@" -Wc,-MD
-   else
-      tmpdepfile1=$dir$base.o.d
-      tmpdepfile2=$dir$base.d
-      tmpdepfile3=$dir$base.d
-      tmpdepfile4=$dir$base.d
-      "$@" -MD
-   fi
+  if test "$libtool" = yes; then
+    # Libtool generates 2 separate objects for the 2 libraries.  These
+    # two compilations output dependencies in $dir.libs/$base.o.d and
+    # in $dir$base.o.d.  We have to check for both files, because
+    # one of the two compilations can be disabled.  We should prefer
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    # automatically cleaned when .libs/ is deleted, while ignoring
+    # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
+    "$@" -Wc,-MD
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    tmpdepfile3=$dir$base.d
+    "$@" -MD
+  fi

-   stat=$?
-   if test $stat -eq 0; then :
-   else
-      rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
-      exit $stat
-   fi
+  stat=$?
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi

-   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
-   do
-     test -f "$tmpdepfile" && break
-   done
-   if test -f "$tmpdepfile"; then
-      sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
-      # That's a tab and a space in the [].
-      sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
-   else
-      echo "#dummy" > "$depfile"
-   fi
-   rm -f "$tmpdepfile"
-   ;;
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  # Same post-processing that is required for AIX mode.
+  aix_post_process_depfile
+  ;;
+
+msvc7)
+  if test "$libtool" = yes; then
+    showIncludes=-Wc,-showIncludes
+  else
+    showIncludes=-showIncludes
+  fi
+  "$@" $showIncludes > "$tmpdepfile"
+  stat=$?
+  grep -v '^Note: including file: ' "$tmpdepfile"
+  if test $stat -ne 0; then
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  # The first sed program below extracts the file names and escapes
+  # backslashes for cygpath.  The second sed program outputs the file
+  # name when reading, but also accumulates all include files in the
+  # hold buffer in order to output them again at the end.  This only
+  # works with sed implementations that can handle large buffers.
+  sed < "$tmpdepfile" -n '
+/^Note: including file:  *\(.*\)/ {
+  s//\1/
+  s/\\/\\\\/g
+  p
+}' | $cygpath_u | sort -u | sed -n '
+s/ /\\ /g
+s/\(.*\)/'"$tab"'\1 \\/p
+s/.\(.*\) \\/\1:/
+H
+$ {
+  s/.*/'"$tab"'/
+  G
+  p
+}' >> "$depfile"
+  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
+  rm -f "$tmpdepfile"
+  ;;
+
+msvc7msys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;

 #nosideeffect)
  # This comment above is used by automake to tell side-effect
@@ -345,13 +574,13 @@ dashmstdout)

  # Remove the call to Libtool.
  if test "$libtool" = yes; then
-    while test $1 != '--mode=compile'; do
+    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi

-  # Remove `-o $object'.
+  # Remove '-o $object'.
  IFS=" "
  for arg
  do
@@ -371,18 +600,18 @@ dashmstdout)
  done

  test -z "$dashmflag" && dashmflag=-M
-  # Require at least two characters before searching for `:'
+  # Require at least two characters before searching for ':'
  # in the target name.  This is to cope with DOS-style filenames:
-  # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise.
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
  "$@" $dashmflag |
-    sed 's:^[  ]*[^: ][^:][^:]*\:[    ]*:'"$object"'\: :' > "$tmpdepfile"
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
  rm -f "$depfile"
  cat < "$tmpdepfile" > "$depfile"
-  tr ' ' '
-' < "$tmpdepfile" | \
-## Some versions of the HPUX 10.20 sed can't process this invocation
-## correctly.  Breaking it into two sed invocations is a workaround.
-    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  tr ' ' "$nl" < "$tmpdepfile" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;

@@ -396,41 +625,51 @@ makedepend)
  "$@" || exit $?
  # Remove any Libtool call
  if test "$libtool" = yes; then
-    while test $1 != '--mode=compile'; do
+    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi
  # X makedepend
  shift
-  cleared=no
-  for arg in "$@"; do
+  cleared=no eat=no
+  for arg
+  do
    case $cleared in
    no)
      set ""; shift
      cleared=yes ;;
    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
    case "$arg" in
    -D*|-I*)
      set fnord "$@" "$arg"; shift ;;
    # Strip any option that makedepend may not understand.  Remove
    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
    -*|$object)
      ;;
    *)
      set fnord "$@" "$arg"; shift ;;
    esac
  done
-  obj_suffix="`echo $object | sed 's/^.*\././'`"
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
  touch "$tmpdepfile"
  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
  rm -f "$depfile"
-  cat < "$tmpdepfile" > "$depfile"
-  sed '1,2d' "$tmpdepfile" | tr ' ' '
-' | \
-## Some versions of the HPUX 10.20 sed can't process this invocation
-## correctly.  Breaking it into two sed invocations is a workaround.
-    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
+  # No need to regex-escape $object, excess matching of '.' is harmless.
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed '1,2d' "$tmpdepfile" \
+    | tr ' ' "$nl" \
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
+    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile" "$tmpdepfile".bak
  ;;

@@ -441,13 +680,13 @@ cpp)

  # Remove the call to Libtool.
  if test "$libtool" = yes; then
-    while test $1 != '--mode=compile'; do
+    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi

-  # Remove `-o $object'.
+  # Remove '-o $object'.
  IFS=" "
  for arg
  do
@@ -466,10 +705,10 @@ cpp)
    esac
  done

-  "$@" -E |
-    sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
-       -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
-    sed '$ s: \\$::' > "$tmpdepfile"
+  "$@" -E \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed '$ s: \\$::' > "$tmpdepfile"
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
  cat < "$tmpdepfile" >> "$depfile"
@@ -479,35 +718,56 @@ cpp)

 msvisualcpp)
  # Important note: in order to support this mode, a compiler *must*
-  # always write the preprocessed file to stdout, regardless of -o,
-  # because we must use -o when running libtool.
+  # always write the preprocessed file to stdout.
  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
  IFS=" "
  for arg
  do
    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
-	set fnord "$@"
-	shift
-	shift
-	;;
+        set fnord "$@"
+        shift
+        shift
+        ;;
    *)
-	set fnord "$@" "$arg"
-	shift
-	shift
-	;;
+        set fnord "$@" "$arg"
+        shift
+        shift
+        ;;
    esac
  done
-  "$@" -E |
-  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::echo "`cygpath -u \\"\1\\"`":p' | sort | uniq > "$tmpdepfile"
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
-  . "$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::	\1 \\:p' >> "$depfile"
-  echo "	" >> "$depfile"
-  . "$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
+  echo "$tab" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;

+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
 none)
  exec "$@"
  ;;
@@ -523,8 +783,9 @@ exit 0
 # Local Variables:
 # mode: shell-script
 # sh-indentation: 2
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-end: "$"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
 # End:
--- a/docs/BINDINGS
+++ b/docs/BINDINGS
@@ -10,16 +10,16 @@ Cocoa/Objective-C
  https://github.com/karelia/libssh2_sftp-Cocoa-wrapper

 Haskell
-  FFI bindings - http://hackage.haskell.org/package/libssh2
+  FFI bindings - https://hackage.haskell.org/package/libssh2

 Perl
-  Net::SSH2 - http://search.cpan.org/~rkitover/Net-SSH2-0.45/lib/Net/SSH2.pm
+  Net::SSH2 - https://metacpan.org/pod/Net::SSH2

 PHP
-  ssh2 - http://pecl.php.net/package/ssh2 
+  ssh2 - https://pecl.php.net/package/ssh2

 Python
-  pylibssh2 - http://www.wallix.org/pylibssh2-project/
+  pylibssh2 - https://pypi.python.org/pypi/pylibssh2

 Python-ctypes

--- a/docs/CMakeLists.txt
+++ b/docs/CMakeLists.txt
@@ -0,0 +1,210 @@
+# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+set(MAN_PAGES
+  libssh2_agent_connect.3
+  libssh2_agent_disconnect.3
+  libssh2_agent_free.3
+  libssh2_agent_get_identity.3
+  libssh2_agent_get_identity_path.3
+  libssh2_agent_init.3
+  libssh2_agent_list_identities.3
+  libssh2_agent_set_identity_path.3
+  libssh2_agent_userauth.3
+  libssh2_banner_set.3
+  libssh2_base64_decode.3
+  libssh2_channel_close.3
+  libssh2_channel_direct_tcpip.3
+  libssh2_channel_direct_tcpip_ex.3
+  libssh2_channel_eof.3
+  libssh2_channel_exec.3
+  libssh2_channel_flush.3
+  libssh2_channel_flush_ex.3
+  libssh2_channel_flush_stderr.3
+  libssh2_channel_forward_accept.3
+  libssh2_channel_forward_cancel.3
+  libssh2_channel_forward_listen.3
+  libssh2_channel_forward_listen_ex.3
+  libssh2_channel_free.3
+  libssh2_channel_get_exit_signal.3
+  libssh2_channel_get_exit_status.3
+  libssh2_channel_handle_extended_data.3
+  libssh2_channel_handle_extended_data2.3
+  libssh2_channel_ignore_extended_data.3
+  libssh2_channel_open_ex.3
+  libssh2_channel_open_session.3
+  libssh2_channel_process_startup.3
+  libssh2_channel_read.3
+  libssh2_channel_read_ex.3
+  libssh2_channel_read_stderr.3
+  libssh2_channel_receive_window_adjust.3
+  libssh2_channel_receive_window_adjust2.3
+  libssh2_channel_request_pty.3
+  libssh2_channel_request_pty_ex.3
+  libssh2_channel_request_pty_size.3
+  libssh2_channel_request_pty_size_ex.3
+  libssh2_channel_send_eof.3
+  libssh2_channel_set_blocking.3
+  libssh2_channel_setenv.3
+  libssh2_channel_setenv_ex.3
+  libssh2_channel_shell.3
+  libssh2_channel_subsystem.3
+  libssh2_channel_wait_closed.3
+  libssh2_channel_wait_eof.3
+  libssh2_channel_window_read.3
+  libssh2_channel_window_read_ex.3
+  libssh2_channel_window_write.3
+  libssh2_channel_window_write_ex.3
+  libssh2_channel_write.3
+  libssh2_channel_write_ex.3
+  libssh2_channel_write_stderr.3
+  libssh2_channel_x11_req.3
+  libssh2_channel_x11_req_ex.3
+  libssh2_exit.3
+  libssh2_free.3
+  libssh2_hostkey_hash.3
+  libssh2_init.3
+  libssh2_keepalive_config.3
+  libssh2_keepalive_send.3
+  libssh2_knownhost_add.3
+  libssh2_knownhost_addc.3
+  libssh2_knownhost_check.3
+  libssh2_knownhost_checkp.3
+  libssh2_knownhost_del.3
+  libssh2_knownhost_free.3
+  libssh2_knownhost_get.3
+  libssh2_knownhost_init.3
+  libssh2_knownhost_readfile.3
+  libssh2_knownhost_readline.3
+  libssh2_knownhost_writefile.3
+  libssh2_knownhost_writeline.3
+  libssh2_poll.3
+  libssh2_poll_channel_read.3
+  libssh2_publickey_add.3
+  libssh2_publickey_add_ex.3
+  libssh2_publickey_init.3
+  libssh2_publickey_list_fetch.3
+  libssh2_publickey_list_free.3
+  libssh2_publickey_remove.3
+  libssh2_publickey_remove_ex.3
+  libssh2_publickey_shutdown.3
+  libssh2_scp_recv.3
+  libssh2_scp_recv2.3
+  libssh2_scp_send.3
+  libssh2_scp_send64.3
+  libssh2_scp_send_ex.3
+  libssh2_session_abstract.3
+  libssh2_session_banner_get.3
+  libssh2_session_banner_set.3
+  libssh2_session_block_directions.3
+  libssh2_session_callback_set.3
+  libssh2_session_disconnect.3
+  libssh2_session_disconnect_ex.3
+  libssh2_session_flag.3
+  libssh2_session_free.3
+  libssh2_session_get_blocking.3
+  libssh2_session_get_timeout.3
+  libssh2_session_handshake.3
+  libssh2_session_hostkey.3
+  libssh2_session_init.3
+  libssh2_session_init_ex.3
+  libssh2_session_last_errno.3
+  libssh2_session_last_error.3
+  libssh2_session_set_last_error.3
+  libssh2_session_method_pref.3
+  libssh2_session_methods.3
+  libssh2_session_set_blocking.3
+  libssh2_session_set_timeout.3
+  libssh2_session_startup.3
+  libssh2_session_supported_algs.3
+  libssh2_sftp_close.3
+  libssh2_sftp_close_handle.3
+  libssh2_sftp_closedir.3
+  libssh2_sftp_fsetstat.3
+  libssh2_sftp_fstat.3
+  libssh2_sftp_fstat_ex.3
+  libssh2_sftp_fstatvfs.3
+  libssh2_sftp_fsync.3
+  libssh2_sftp_get_channel.3
+  libssh2_sftp_init.3
+  libssh2_sftp_last_error.3
+  libssh2_sftp_lstat.3
+  libssh2_sftp_mkdir.3
+  libssh2_sftp_mkdir_ex.3
+  libssh2_sftp_open.3
+  libssh2_sftp_open_ex.3
+  libssh2_sftp_opendir.3
+  libssh2_sftp_read.3
+  libssh2_sftp_readdir.3
+  libssh2_sftp_readdir_ex.3
+  libssh2_sftp_readlink.3
+  libssh2_sftp_realpath.3
+  libssh2_sftp_rename.3
+  libssh2_sftp_rename_ex.3
+  libssh2_sftp_rewind.3
+  libssh2_sftp_rmdir.3
+  libssh2_sftp_rmdir_ex.3
+  libssh2_sftp_seek.3
+  libssh2_sftp_seek64.3
+  libssh2_sftp_setstat.3
+  libssh2_sftp_shutdown.3
+  libssh2_sftp_stat.3
+  libssh2_sftp_stat_ex.3
+  libssh2_sftp_statvfs.3
+  libssh2_sftp_symlink.3
+  libssh2_sftp_symlink_ex.3
+  libssh2_sftp_tell.3
+  libssh2_sftp_tell64.3
+  libssh2_sftp_unlink.3
+  libssh2_sftp_unlink_ex.3
+  libssh2_sftp_write.3
+  libssh2_trace.3
+  libssh2_trace_sethandler.3
+  libssh2_userauth_authenticated.3
+  libssh2_userauth_hostbased_fromfile.3
+  libssh2_userauth_hostbased_fromfile_ex.3
+  libssh2_userauth_keyboard_interactive.3
+  libssh2_userauth_keyboard_interactive_ex.3
+  libssh2_userauth_list.3
+  libssh2_userauth_password.3
+  libssh2_userauth_password_ex.3
+  libssh2_userauth_publickey.3
+  libssh2_userauth_publickey_fromfile.3
+  libssh2_userauth_publickey_fromfile_ex.3
+  libssh2_userauth_publickey_frommemory.3
+  libssh2_version.3)
+
+include(GNUInstallDirs)
+install(FILES ${MAN_PAGES} DESTINATION ${CMAKE_INSTALL_MANDIR}/man3)
--- a/docs/HACKING-CRYPTO
+++ b/docs/HACKING-CRYPTO
@@ -0,0 +1,902 @@
+    Definitions needed to implement a specific crypto library
+
+This document offers some hints about implementing a new crypto library
+interface.
+
+A crypto library interface consists of at least a header file, defining
+entities referenced from the libssh2 core modules.
+Real code implementation (if needed), is left at the implementor's choice.
+
+This document lists the entities that must/may be defined in the header file.
+
+Procedures listed as "void" may indeed have a result type: the void indication
+indicates the libssh2 core modules never use the function result.
+
+
+0) Build system.
+
+Adding a crypto backend to the autotools build system (./configure) is easy:
+
+0.1) Add one new line in configure.ac
+
+m4_set_add([crypto_backends], [newname])
+
+This automatically creates a --with-crypto=newname option.
+
+0.2) Add an m4_case stanza to LIBSSH2_CRYPTO_CHECK in acinclude.m4
+
+This must check for all required libraries, and if found set and AC_SUBST a
+variable with the library linking flags. The recommended method is to use
+LIBSSH2_LIB_HAVE_LINKFLAGS from LIBSSH2_CRYPTO_CHECK, which automatically
+creates and handles a --with-$newname-prefix option and sets an
+LTLIBNEWNAME variable on success.
+
+0.3) Create Makefile.newname.inc in the top-level directory
+
+This must set CRYPTO_CSOURCES, CRYPTO_HHEADERS and CRYPTO_LTLIBS.
+Set CRYPTO_CSOURCES and CRYPTO_HHEADERS to the new backend source files
+and set CRYPTO_LTLIBS to the required library linking parameters, e.g.
+$(LTLIBNEWNAME) as generated by by LIBSSH2_LIB_HAVE_LINKFLAGS.
+
+0.4) Add a new block in src/Makefile.am
+
+if NEWNAME
+include ../Makefile.newname.inc
+endif
+
+
+1) Crypto library initialization/termination.
+
+void libssh2_crypto_init(void);
+Initializes the crypto library. May be an empty macro if not needed.
+
+void libssh2_crypto_exit(void);
+Terminates the crypto library use. May be an empty macro if not needed.
+
+
+2) HMAC
+
+libssh2_hmac_ctx
+Type of an HMAC computation context. Generally a struct.
+Used for all hash algorithms.
+
+void libssh2_hmac_ctx_init(libssh2_hmac_ctx ctx);
+Initializes the HMAC computation context ctx.
+Called before setting-up the hash algorithm.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_hmac_update(libssh2_hmac_ctx ctx,
+                         const unsigned char *data,
+                         int datalen);
+Continue computation of an HMAC on datalen bytes at data using context ctx.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_hmac_final(libssh2_hmac_ctx ctx,
+                        unsigned char output[]);
+Get the computed HMAC from context ctx into the output buffer. The
+minimum data buffer size depends on the HMAC hash algorithm.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_hmac_cleanup(libssh2_hmac_ctx *ctx);
+Releases the HMAC computation context at ctx.
+
+
+3) Hash algorithms.
+
+3.1) SHA-1
+Must always be implemented.
+
+SHA_DIGEST_LENGTH
+#define to 20, the SHA-1 digest length.
+
+libssh2_sha1_ctx
+Type of an SHA-1 computation context. Generally a struct.
+
+int libssh2_sha1_init(libssh2_sha1_ctx *x);
+Initializes the SHA-1 computation context at x.
+Returns 1 for success and 0 for failure
+
+void libssh2_sha1_update(libssh2_sha1_ctx ctx,
+                         const unsigned char *data,
+                         size_t len);
+Continue computation of SHA-1 on len bytes at data using context ctx.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_sha1_final(libssh2_sha1_ctx ctx,
+                        unsigned char output[SHA_DIGEST_LEN]);
+Get the computed SHA-1 signature from context ctx and store it into the
+output buffer.
+Release the context.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_hmac_sha1_init(libssh2_hmac_ctx *ctx,
+                            const void *key,
+                            int keylen);
+Setup the HMAC computation context ctx for an HMAC-SHA-1 computation using the
+keylen-byte key. Is invoked just after libssh2_hmac_ctx_init().
+
+3.2) SHA-256
+Must always be implemented.
+
+SHA256_DIGEST_LENGTH
+#define to 32, the SHA-256 digest length.
+
+libssh2_sha256_ctx
+Type of an SHA-256 computation context. Generally a struct.
+
+int libssh2_sha256_init(libssh2_sha256_ctx *x);
+Initializes the SHA-256 computation context at x.
+Returns 1 for success and 0 for failure
+
+void libssh2_sha256_update(libssh2_sha256_ctx ctx,
+                           const unsigned char *data,
+                           size_t len);
+Continue computation of SHA-256 on len bytes at data using context ctx.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_sha256_final(libssh2_sha256_ctx ctx,
+                          unsigned char output[SHA256_DIGEST_LENGTH]);
+Gets the computed SHA-256 signature from context ctx into the output buffer.
+Release the context.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+int libssh2_sha256(const unsigned char *message,
+                   unsigned long len,
+                   unsigned char output[SHA256_DIGEST_LENGTH]);
+Computes the SHA-256 signature over the given message of length len and
+store the result into the output buffer.
+Return 1 if error, else 0.
+Note: Seems unused in current code, but defined in each crypto library backend.
+
+LIBSSH2_HMAC_SHA256
+#define as 1 if the crypto library supports HMAC-SHA-256, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+void libssh2_hmac_sha256_init(libssh2_hmac_ctx *ctx,
+                              const void *key,
+                              int keylen);
+Setup the HMAC computation context ctx for an HMAC-256 computation using the
+keylen-byte key. Is invoked just after libssh2_hmac_ctx_init().
+
+3.3) SHA-384
+Mandatory if ECDSA is implemented. Can be omitted otherwise.
+
+SHA384_DIGEST_LENGTH
+#define to 48, the SHA-384 digest length.
+
+libssh2_sha384_ctx
+Type of an SHA-384 computation context. Generally a struct.
+
+int libssh2_sha384_init(libssh2_sha384_ctx *x);
+Initializes the SHA-384 computation context at x.
+Returns 1 for success and 0 for failure
+
+void libssh2_sha384_update(libssh2_sha384_ctx ctx,
+                           const unsigned char *data,
+                           size_t len);
+Continue computation of SHA-384 on len bytes at data using context ctx.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_sha384_final(libssh2_sha384_ctx ctx,
+                          unsigned char output[SHA384_DIGEST_LENGTH]);
+Gets the computed SHA-384 signature from context ctx into the output buffer.
+Release the context.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+int libssh2_sha384(const unsigned char *message,
+                   unsigned long len,
+                   unsigned char output[SHA384_DIGEST_LENGTH]);
+Computes the SHA-384 signature over the given message of length len and
+store the result into the output buffer.
+Return 1 if error, else 0.
+
+3.4) SHA-512
+Must always be implemented.
+
+SHA512_DIGEST_LENGTH
+#define to 64, the SHA-512 digest length.
+
+libssh2_sha512_ctx
+Type of an SHA-512 computation context. Generally a struct.
+
+int libssh2_sha512_init(libssh2_sha512_ctx *x);
+Initializes the SHA-512 computation context at x.
+Returns 1 for success and 0 for failure
+
+void libssh2_sha512_update(libssh2_sha512_ctx ctx,
+                           const unsigned char *data,
+                           size_t len);
+Continue computation of SHA-512 on len bytes at data using context ctx.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_sha512_final(libssh2_sha512_ctx ctx,
+                          unsigned char output[SHA512_DIGEST_LENGTH]);
+Gets the computed SHA-512 signature from context ctx into the output buffer.
+Release the context.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+int libssh2_sha512(const unsigned char *message,
+                   unsigned long len,
+                   unsigned char output[SHA512_DIGEST_LENGTH]);
+Computes the SHA-512 signature over the given message of length len and
+store the result into the output buffer.
+Return 1 if error, else 0.
+Note: Seems unused in current code, but defined in each crypto library backend.
+
+LIBSSH2_HMAC_SHA512
+#define as 1 if the crypto library supports HMAC-SHA-512, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+void libssh2_hmac_sha512_init(libssh2_hmac_ctx *ctx,
+                              const void *key,
+                              int keylen);
+Setup the HMAC computation context ctx for an HMAC-512 computation using the
+keylen-byte key. Is invoked just after libssh2_hmac_ctx_init().
+
+3.5) MD5
+LIBSSH2_MD5
+#define to 1 if the crypto library supports MD5, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+MD5_DIGEST_LENGTH
+#define to 16, the MD5 digest length.
+
+libssh2_md5_ctx
+Type of an MD5 computation context. Generally a struct.
+
+int libssh2_md5_init(libssh2_md5_ctx *x);
+Initializes the MD5 computation context at x.
+Returns 1 for success and 0 for failure
+
+void libssh2_md5_update(libssh2_md5_ctx ctx,
+                        const unsigned char *data,
+                        size_t len);
+Continues computation of MD5 on len bytes at data using context ctx.
+Returns 1 for success and 0 for failure.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_md5_final(libssh2_md5_ctx ctx,
+                       unsigned char output[MD5_DIGEST_LENGTH]);
+Gets the computed MD5 signature from context ctx into the output buffer.
+Release the context.
+Note: if the ctx parameter is modified by the underlying code,
+this procedure must be implemented as a macro to map ctx --> &ctx.
+
+void libssh2_hmac_md5_init(libssh2_hmac_ctx *ctx,
+                           const void *key,
+                           int keylen);
+Setup the HMAC computation context ctx for an HMAC-MD5 computation using the
+keylen-byte key. Is invoked just after libssh2_hmac_ctx_init().
+
+3.6) RIPEMD-160
+LIBSSH2_HMAC_RIPEMD
+#define as 1 if the crypto library supports HMAC-RIPEMD-160, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+void libssh2_hmac_ripemd160_init(libssh2_hmac_ctx *ctx,
+                                 const void *key,
+                                 int keylen);
+Setup the HMAC computation context ctx for an HMAC-RIPEMD-160 computation using
+the keylen-byte key. Is invoked just after libssh2_hmac_ctx_init().
+Returns 1 for success and 0 for failure.
+
+
+4) Bidirectional key ciphers.
+
+_libssh2_cipher_ctx
+Type of a cipher computation context.
+
+_libssh2_cipher_type(name);
+Macro defining name as storage identifying a cipher algorithm for
+the crypto library interface. No trailing semicolon.
+
+int _libssh2_cipher_init(_libssh2_cipher_ctx *h,
+                         _libssh2_cipher_type(algo),
+                         unsigned char *iv,
+                         unsigned char *secret,
+                         int encrypt);
+Creates a cipher context for the given algorithm with the initialization vector
+iv and the secret key secret. Prepare for encryption or decryption depending on
+encrypt.
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_cipher_crypt(_libssh2_cipher_ctx *ctx,
+                          _libssh2_cipher_type(algo),
+                          int encrypt,
+                          unsigned char *block,
+                          size_t blocksize);
+Encrypt or decrypt in-place data at (block, blocksize) using the given
+context and/or algorithm.
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+void _libssh2_cipher_dtor(_libssh2_cipher_ctx *ctx);
+Release cipher context at ctx.
+
+4.1) AES
+4.1.1) AES in CBC block mode.
+LIBSSH2_AES
+#define as 1 if the crypto library supports AES in CBC mode, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+_libssh2_cipher_aes128
+AES-128-CBC algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+_libssh2_cipher_aes192
+AES-192-CBC algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+_libssh2_cipher_aes256
+AES-256-CBC algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+4.1.2) AES in CTR block mode.
+LIBSSH2_AES_CTR
+#define as 1 if the crypto library supports AES in CTR mode, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+_libssh2_cipher_aes128ctr
+AES-128-CTR algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+_libssh2_cipher_aes192ctr
+AES-192-CTR algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+_libssh2_cipher_aes256ctr
+AES-256-CTR algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+4.2) Blowfish in CBC block mode.
+LIBSSH2_BLOWFISH
+#define as 1 if the crypto library supports blowfish in CBC mode, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+_libssh2_cipher_blowfish
+Blowfish-CBC algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+4.3) RC4.
+LIBSSH2_RC4
+#define as 1 if the crypto library supports RC4 (arcfour), else 0.
+If defined as 0, the rest of this section can be omitted.
+
+_libssh2_cipher_arcfour
+RC4 algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+4.4) CAST5 in CBC block mode.
+LIBSSH2_CAST
+#define 1 if the crypto library supports cast, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+_libssh2_cipher_cast5
+CAST5-CBC algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+4.5) Tripple DES in CBC block mode.
+LIBSSH2_3DES
+#define as 1 if the crypto library supports TripleDES in CBC mode, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+_libssh2_cipher_3des
+TripleDES-CBC algorithm identifier initializer.
+#define with constant value of type _libssh2_cipher_type().
+
+
+5) Diffie-Hellman support.
+
+5.1) Diffie-Hellman context.
+_libssh2_dh_ctx
+Type of a Diffie-Hellman computation context.
+Must always be defined.
+
+5.2) Diffie-Hellman computation procedures.
+void libssh2_dh_init(_libssh2_dh_ctx *dhctx);
+Initializes the Diffie-Hellman context at `dhctx'. No effective context
+creation needed here.
+
+int libssh2_dh_key_pair(_libssh2_dh_ctx *dhctx, _libssh2_bn *public,
+                        _libssh2_bn *g, _libssh2_bn *p, int group_order,
+                        _libssh2_bn_ctx *bnctx);
+Generates a Diffie-Hellman key pair using base `g', prime `p' and the given
+`group_order'. Can use the given big number context `bnctx' if needed.
+The private key is stored as opaque in the Diffie-Hellman context `*dhctx' and
+the public key is returned in `public'.
+0 is returned upon success, else -1.
+
+int libssh2_dh_secret(_libssh2_dh_ctx *dhctx, _libssh2_bn *secret,
+                      _libssh2_bn *f, _libssh2_bn *p, _libssh2_bn_ctx * bnctx)
+Computes the Diffie-Hellman secret from the previously created context `*dhctx',
+the public key `f' from the other party and the same prime `p' used at
+context creation. The result is stored in `secret'.
+0 is returned upon success, else -1.
+
+void libssh2_dh_dtor(_libssh2_dh_ctx *dhctx)
+Destroys Diffie-Hellman context at `dhctx' and resets its storage.
+
+
+6) Big numbers.
+Positive multi-byte integers support is sufficient.
+
+6.1) Computation contexts.
+This has a real meaning if the big numbers computations need some context
+storage. If not, use a dummy type and functions (macros).
+
+_libssh2_bn_ctx
+Type of multiple precision computation context. May not be empty. if not used,
+#define as char, for example.
+
+_libssh2_bn_ctx _libssh2_bn_ctx_new(void);
+Returns a new multiple precision computation context.
+
+void _libssh2_bn_ctx_free(_libssh2_bn_ctx ctx);
+Releases a multiple precision computation context.
+
+6.2) Computation support.
+_libssh2_bn
+Type of multiple precision numbers (aka bignumbers or huge integers) for the
+crypto library.
+
+_libssh2_bn * _libssh2_bn_init(void);
+Creates a multiple precision number (preset to zero).
+
+_libssh2_bn * _libssh2_bn_init_from_bin(void);
+Create a multiple precision number intended to be set by the
+_libssh2_bn_from_bin() function (see below). Unlike _libssh2_bn_init(), this
+code may be a dummy initializer if the _libssh2_bn_from_bin() actually
+allocates the number. Returns a value of type _libssh2_bn *.
+
+void _libssh2_bn_free(_libssh2_bn *bn);
+Destroys the multiple precision number at bn.
+
+unsigned long _libssh2_bn_bytes(_libssh2_bn *bn);
+Get the number of bytes needed to store the bits of the multiple precision
+number at bn.
+
+unsigned long _libssh2_bn_bits(_libssh2_bn *bn);
+Returns the number of bits of multiple precision number at bn.
+
+int _libssh2_bn_set_word(_libssh2_bn *bn, unsigned long val);
+Sets the value of bn to val.
+Returns 1 on success, 0 otherwise.
+
+_libssh2_bn * _libssh2_bn_from_bin(_libssh2_bn *bn, int len,
+                                   const unsigned char *val);
+Converts the positive integer in big-endian form of length len at val
+into a _libssh2_bn and place it in bn. If bn is NULL, a new _libssh2_bn is
+created.
+Returns a pointer to target _libssh2_bn or NULL if error.
+
+int _libssh2_bn_to_bin(_libssh2_bn *bn, unsigned char *val);
+Converts the absolute value of bn into big-endian form and store it at
+val. val must point to _libssh2_bn_bytes(bn) bytes of memory.
+Returns the length of the big-endian number.
+
+
+7) Private key algorithms.
+Format of an RSA public key:
+a) "ssh-rsa".
+b) RSA exponent, MSB first, with high order bit = 0.
+c) RSA modulus, MSB first, with high order bit = 0.
+Each item is preceded by its 32-bit byte length, MSB first.
+
+Format of a DSA public key:
+a) "ssh-dss".
+b) p, MSB first, with high order bit = 0.
+c) q, MSB first, with high order bit = 0.
+d) g, MSB first, with high order bit = 0.
+e) pub_key, MSB first, with high order bit = 0.
+Each item is preceded by its 32-bit byte length, MSB first.
+
+Format of an ECDSA public key:
+a) "ecdsa-sha2-nistp256" or "ecdsa-sha2-nistp384" or "ecdsa-sha2-nistp521".
+b) domain: "nistp256", "nistp384" or "nistp521" matching a).
+c) raw public key ("octal").
+Each item is preceded by its 32-bit byte length, MSB first.
+
+Format of an ED25519 public key:
+a) "ssh-ed25519".
+b) raw key (32 bytes).
+Each item is preceded by its 32-bit byte length, MSB first.
+
+int _libssh2_pub_priv_keyfile(LIBSSH2_SESSION *session,
+                              unsigned char **method,
+                              size_t *method_len,
+                              unsigned char **pubkeydata,
+                              size_t *pubkeydata_len,
+                              const char *privatekey,
+                              const char *passphrase);
+Reads a private key from file privatekey and extract the public key -->
+(pubkeydata, pubkeydata_len). Store the associated method (ssh-rsa or ssh-dss)
+into (method, method_len).
+Both buffers have to be allocated using LIBSSH2_ALLOC().
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_pub_priv_keyfilememory(LIBSSH2_SESSION *session,
+                                    unsigned char **method,
+                                    size_t *method_len,
+                                    unsigned char **pubkeydata,
+                                    size_t *pubkeydata_len,
+                                    const char *privatekeydata,
+                                    size_t privatekeydata_len,
+                                    const char *passphrase);
+Gets a private key from bytes at (privatekeydata, privatekeydata_len) and
+extract the public key --> (pubkeydata, pubkeydata_len). Store the associated
+method (ssh-rsa or ssh-dss) into (method, method_len).
+Both buffers have to be allocated using LIBSSH2_ALLOC().
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+
+7.1) RSA
+LIBSSH2_RSA
+#define as 1 if the crypto library supports RSA, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+libssh2_rsa_ctx
+Type of an RSA computation context. Generally a struct.
+
+int _libssh2_rsa_new(libssh2_rsa_ctx **rsa,
+                     const unsigned char *edata,
+                     unsigned long elen,
+                     const unsigned char *ndata,
+                     unsigned long nlen,
+                     const unsigned char *ddata,
+                     unsigned long dlen,
+                     const unsigned char *pdata,
+                     unsigned long plen,
+                     const unsigned char *qdata,
+                     unsigned long qlen,
+                     const unsigned char *e1data,
+                     unsigned long e1len,
+                     const unsigned char *e2data,
+                     unsigned long e2len,
+                     const unsigned char *coeffdata, unsigned long coefflen);
+Creates a new context for RSA computations from key source values:
+    pdata, plen    Prime number p. Only used if private key known (ddata).
+    qdata, qlen    Prime number q. Only used if private key known (ddata).
+    ndata, nlen    Modulus n.
+    edata, elen    Exponent e.
+    ddata, dlen    e^-1 % phi(n) = private key. May be NULL if unknown.
+    e1data, e1len    dp = d % (p-1). Only used if private key known (dtata).
+    e2data, e2len    dq = d % (q-1). Only used if private key known (dtata).
+    coeffdata, coefflen    q^-1 % p. Only used if private key known.
+Returns 0 if OK.
+This procedure is already prototyped in crypto.h.
+Note: the current generic code only calls this function with e and n (public
+key parameters): unless used internally by the backend, it is not needed to
+support the private key and the other parameters here.
+
+int _libssh2_rsa_new_private(libssh2_rsa_ctx **rsa,
+                             LIBSSH2_SESSION *session,
+                             const char *filename,
+                             unsigned const char *passphrase);
+Reads an RSA private key from file filename into a new RSA context.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_rsa_new_private_frommemory(libssh2_rsa_ctx **rsa,
+                                        LIBSSH2_SESSION *session,
+                                        const char *data,
+          size_t data_len,
+                                        unsigned const char *passphrase);
+Gets an RSA private key from data into a new RSA context.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_rsa_sha1_verify(libssh2_rsa_ctx *rsa,
+                             const unsigned char *sig,
+                             unsigned long sig_len,
+                             const unsigned char *m, unsigned long m_len);
+Verify (sig, sig_len) signature of (m, m_len) using an SHA-1 hash and the
+RSA context.
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_rsa_sha1_signv(LIBSSH2_SESSION *session,
+                            unsigned char **sig, size_t *siglen,
+                            int count, const struct iovec vector[],
+                            libssh2_rsa_ctx *ctx);
+RSA signs the SHA-1 hash computed over the count data chunks in vector.
+Signature is stored at (sig, siglen).
+Signature buffer must be allocated from the given session.
+Returns 0 if OK, else -1.
+Note: this procedure is optional: if provided, it MUST be defined as a macro.
+
+int _libssh2_rsa_sha1_sign(LIBSSH2_SESSION *session,
+                           libssh2_rsa_ctx *rsactx,
+                           const unsigned char *hash,
+                           size_t hash_len,
+                           unsigned char **signature,
+                           size_t *signature_len);
+RSA signs the (hash, hashlen) SHA-1 hash bytes and stores the allocated
+signature at (signature, signature_len).
+Signature buffer must be allocated from the given session.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+Note: this procedure is not used if macro _libssh2_rsa_sha1_signv() is defined.
+
+void _libssh2_rsa_free(libssh2_rsa_ctx *rsactx);
+Releases the RSA computation context at rsactx.
+
+
+7.2) DSA
+LIBSSH2_DSA
+#define as 1 if the crypto library supports DSA, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+
+libssh2_dsa_ctx
+Type of a DSA computation context. Generally a struct.
+
+int _libssh2_dsa_new(libssh2_dsa_ctx **dsa,
+                     const unsigned char *pdata,
+                     unsigned long plen,
+                     const unsigned char *qdata,
+                     unsigned long qlen,
+                     const unsigned char *gdata,
+                     unsigned long glen,
+                     const unsigned char *ydata,
+                     unsigned long ylen,
+                     const unsigned char *x, unsigned long x_len);
+Creates a new context for DSA computations from source key values:
+    pdata, plen    Prime number p. Only used if private key known (ddata).
+    qdata, qlen    Prime number q. Only used if private key known (ddata).
+    gdata, glen    G number.
+    ydata, ylen    Public key.
+    xdata, xlen    Private key. Only taken if xlen non-zero.
+Returns 0 if OK.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_dsa_new_private(libssh2_dsa_ctx **dsa,
+                             LIBSSH2_SESSION *session,
+                             const char *filename,
+                             unsigned const char *passphrase);
+Gets a DSA private key from file filename into a new DSA context.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_dsa_new_private_frommemory(libssh2_dsa_ctx **dsa,
+                                        LIBSSH2_SESSION *session,
+                                        const char *data,
+                                        size_t data_len,
+                                        unsigned const char *passphrase);
+Gets a DSA private key from the data_len-bytes data into a new DSA context.
+Must call _libssh2_init_if_needed().
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_dsa_sha1_verify(libssh2_dsa_ctx *dsactx,
+                             const unsigned char *sig,
+                             const unsigned char *m, unsigned long m_len);
+Verify (sig, siglen) signature of (m, m_len) using an SHA-1 hash and the
+DSA context.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_dsa_sha1_sign(libssh2_dsa_ctx *dsactx,
+                           const unsigned char *hash,
+                           unsigned long hash_len, unsigned char *sig);
+DSA signs the (hash, hash_len) data using SHA-1 and store the signature at sig.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+void _libssh2_dsa_free(libssh2_dsa_ctx *dsactx);
+Releases the DSA computation context at dsactx.
+
+
+7.3) ECDSA
+LIBSSH2_ECDSA
+#define as 1 if the crypto library supports ECDSA, else 0.
+If defined as 0, _libssh2_ec_key should be defined as void and the rest of
+this section can be omitted.
+
+EC_MAX_POINT_LEN
+Maximum point length. Usually defined as ((528 * 2 / 8) + 1) (= 133).
+
+libssh2_ecdsa_ctx
+Type of an ECDSA computation context. Generally a struct.
+
+_libssh2_ec_key
+Type of an elliptic curve key.
+
+libssh2_curve_type
+An enum type defining curve types. Current supported identifiers are:
+    LIBSSH2_EC_CURVE_NISTP256
+    LIBSSH2_EC_CURVE_NISTP384
+    LIBSSH2_EC_CURVE_NISTP521
+
+int _libssh2_ecdsa_create_key(_libssh2_ec_key **out_private_key,
+                              unsigned char **out_public_key_octal,
+                              size_t *out_public_key_octal_len,
+                              libssh2_curve_type curve_type);
+Create a new ECDSA private key of type curve_type and return it at
+out_private_key. If out_public_key_octal is not NULL, store an allocated
+pointer to the associated public key in "octal" form in it and its length
+at out_public_key_octal_len.
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_new_private(libssh2_ecdsa_ctx **ec_ctx,
+                               LIBSSH2_SESSION * session,
+                               const char *filename,
+                               unsigned const char *passphrase);
+Reads an ECDSA private key from PEM file filename into a new ECDSA context.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_new_private_frommemory(libssh2_ecdsa_ctx ** ec_ctx,
+                                          LIBSSH2_SESSION * session,
+                                          const char *filedata,
+                                          size_t filedata_len,
+                                          unsigned const char *passphrase);
+Builds an ECDSA private key from PEM data at filedata of length filedata_len
+into a new ECDSA context stored at ec_ctx.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_curve_name_with_octal_new(libssh2_ecdsa_ctx **ecdsactx,
+                                             const unsigned char *k,
+                                             size_t k_len,
+                                             libssh2_curve_type type);
+Stores at ecdsactx a new ECDSA context associated with the given curve type
+and with "octal" form public key (k, k_len).
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_new_openssh_private(libssh2_ecdsa_ctx **ec_ctx,
+                                       LIBSSH2_SESSION * session,
+                                       const char *filename,
+                                       unsigned const char *passphrase);
+Reads a PEM-encoded ECDSA private key from file filename encrypted with
+passphrase and stores at ec_ctx a new ECDSA context for it.
+Return 0 if OK, else -1.
+Currently used only from openssl backend (ought to be private).
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_sign(LIBSSH2_SESSION *session, libssh2_ecdsa_ctx *ec_ctx,
+                        const unsigned char *hash, unsigned long hash_len,
+                        unsigned char **signature, size_t *signature_len);
+ECDSA signs the (hash, hashlen) hash bytes and stores the allocated
+signature at (signature, signature_len). Hash algorithm used should be
+SHA-256, SHA-384 or SHA-512 depending on type stored in ECDSA context at ec_ctx.
+Signature buffer must be allocated from the given session.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_verify(libssh2_ecdsa_ctx *ctx,
+                          const unsigned char *r, size_t r_len,
+                          const unsigned char *s, size_t s_len,
+                          const unsigned char *m, size_t m_len);
+Verify the ECDSA signature made of (r, r_len) and (s, s_len) of (m, m_len)
+using the hash algorithm configured in the ECDSA context ctx.
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+libssh2_curve_type _libssh2_ecdsa_get_curve_type(libssh2_ecdsa_ctx *ecdsactx);
+Returns the curve type associated with given context.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ecdsa_curve_type_from_name(const char *name,
+                                        libssh2_curve_type *out_type);
+Stores in out_type the curve type matching string name of the form
+"ecdsa-sha2-nistpxxx".
+Return 0 if OK, else -1.
+Currently used only from openssl backend (ought to be private).
+This procedure is already prototyped in crypto.h.
+
+void _libssh2_ecdsa_free(libssh2_ecdsa_ctx *ecdsactx);
+Releases the ECDSA computation context at ecdsactx.
+
+
+7.4) ED25519
+LIBSSH2_ED25519
+#define as 1 if the crypto library supports ED25519, else 0.
+If defined as 0, the rest of this section can be omitted.
+
+
+libssh2_ed25519_ctx
+Type of an ED25519 computation context. Generally a struct.
+
+int _libssh2_curve25519_new(LIBSSH2_SESSION *session, libssh2_ed25519_ctx **ctx,
+                            uint8_t **out_public_key,
+                            uint8_t **out_private_key);
+Generates an ED25519 key pair, stores a pointer to them at out_private_key
+and out_public_key respectively and stores at ctx a new ED25519 context for
+this key.
+Argument ctx, out_private_key and out_public key may be NULL to disable storing
+the corresponding value.
+Length of each key is LIBSSH2_ED25519_KEY_LEN (32 bytes).
+Key buffers are allocated and should be released by caller after use.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ed25519_new_private(libssh2_ed25519_ctx **ed_ctx,
+                                 LIBSSH2_SESSION *session,
+                                 const char *filename,
+                                 const uint8_t *passphrase);
+Reads an ED25519 private key from PEM file filename into a new ED25519 context.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ed25519_new_public(libssh2_ed25519_ctx **ed_ctx,
+                                LIBSSH2_SESSION *session,
+                                const unsigned char *raw_pub_key,
+                                const uint8_t key_len);
+Stores at ed_ctx a new ED25519 key context for raw public key (raw_pub_key,
+key_len).
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ed25519_new_private_frommemory(libssh2_ed25519_ctx **ed_ctx,
+                                            LIBSSH2_SESSION *session,
+                                            const char *filedata,
+                                            size_t filedata_len,
+                                            unsigned const char *passphrase);
+Builds an ED25519 private key from PEM data at filedata of length filedata_len
+into a new ED25519 context stored at ed_ctx.
+Must call _libssh2_init_if_needed().
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ed25519_sign(libssh2_ed25519_ctx *ctx, LIBSSH2_SESSION *session,
+                          uint8_t **out_sig, size_t *out_sig_len,
+                          const uint8_t *message, size_t message_len);
+ED25519 signs the (message, message_len) bytes and stores the allocated
+signature at (sig, sig_len).
+Signature buffer is allocated from the given session.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_ed25519_verify(libssh2_ed25519_ctx *ctx, const uint8_t *s,
+                            size_t s_len, const uint8_t *m, size_t m_len);
+Verify (s, s_len) signature of (m, m_len) using the given ED25519 context.
+Return 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+int _libssh2_curve25519_gen_k(_libssh2_bn **k,
+                              uint8_t private_key[LIBSSH2_ED25519_KEY_LEN],
+                              uint8_t srvr_public_key[LIBSSH2_ED25519_KEY_LEN]);
+Computes a shared ED25519 secret key from the given raw server public key and
+raw client public key and stores it as a big number in *k. Big number should
+have been initialized before calling this function.
+Returns 0 if OK, else -1.
+This procedure is already prototyped in crypto.h.
+
+void _libssh2_ed25519_free(libssh2_ed25519_ctx *ed25519ctx);
+Releases the ED25519 computation context at ed25519ctx.
+
+
+8) Miscellaneous
+
+void libssh2_prepare_iovec(struct iovec *vector, unsigned int len);
+Prepare len consecutive iovec slots before using them.
+In example, this is needed to preset unused structure slacks on platforms
+requiring it.
+If this is not needed, it should be defined as an empty macro.
+
+int _libssh2_random(unsigned char *buf, int len);
+Store len random bytes at buf.
+Returns 0 if OK, else -1.
--- a/docs/INSTALL_AUTOTOOLS
+++ b/docs/INSTALL_AUTOTOOLS
@@ -7,6 +7,22 @@ Software Foundation, Inc.
 This file is free documentation; the Free Software Foundation gives
 unlimited permission to copy, distribute and modify it.

+When Building directly from Master
+==================================
+
+If you want to build directly from the git repository, you must first
+generate the configure script and Makefile using autotools. There is
+a convenience script that calls all tools in the correct order. Make
+sure that autoconf, automake and libtool are installed on your system,
+then execute:
+
+  autoreconf -fi
+
+After executing this script, you can build the project as usual:
+
+  ./configure
+  make
+
 Basic Installation
 ==================

@@ -284,8 +300,8 @@ Some ./configure options deserve additional comments:
 * --with-libgcrypt-prefix=DIR

 	libssh2 can use the Libgcrypt library
-	(http://www.gnupg.org/) for cryptographic operations.
-	Either Libgcrypt or OpenSSL is required.
+	(https://www.gnupg.org/) for cryptographic operations.
+        One of the cryptographic libraries is required.

 	Configure will attempt to locate Libgcrypt
 	automatically.
@@ -298,8 +314,8 @@ Some ./configure options deserve additional comments:
 * --with-libssl-prefix=[DIR]

 	libssh2 can use the OpenSSL library
-	(http://www.openssl.org) for cryptographic operations.
-	Either Libgcrypt or OpenSSL is required.
+	(https://www.openssl.org) for cryptographic operations.
+        One of the cryptographic libraries is required.

 	Configure will attempt to locate OpenSSL in the
 	default location.
@@ -307,6 +323,20 @@ Some ./configure options deserve additional comments:
 	If your installation of OpenSSL is in another
 	location, specify it using --with-libssl-prefix.

+ * --with-mbedtls
+ * --without-mbedtls
+ * --with-libmbedtls-prefix=[DIR]
+
+        libssh2 can use the mbedTLS library
+        (https://tls.mbed.org) for cryptographic operations.
+        One of the cryptographic libraries is required.
+
+        Configure will attempt to locate mbedTLS in the
+        default location.
+
+        If your installation of mbedTLS is in another
+        location, specify it using --with-libmbedtls-prefix.
+
 * --with-libz
 * --without-libz
 * --with-libz-prefix=[DIR]
--- a/docs/INSTALL_CMAKE.md
+++ b/docs/INSTALL_CMAKE.md
@@ -12,6 +12,7 @@ following cryptography libraries:
 * OpenSSL
 * Libgcrypt
 * WinCNG
+* mbedTLS

 Getting started
 ---------------
@@ -19,10 +20,12 @@ Getting started
 If you are happy with the default options, make a new build directory,
 change to it, configure the build environment and build the project:

+```
  mkdir bin
  cd bin
  cmake ..
  cmake --build .
+```

 libssh2 will be built as a static library and will use any
 cryptography library available.  The library binary will be put in
@@ -39,6 +42,11 @@ pass the options to CMake on the command line:

 The following options are available:

+ * `LINT=ON`
+
+    Enables running the source code linter when building. Can be `ON` or `OFF`.
+
+
 * `BUILD_SHARED_LIBS=OFF`

    Determines whether libssh2 is built as a static library or as a
@@ -47,9 +55,9 @@ The following options are available:
 * `CRYPTO_BACKEND=`

    Chooses a specific cryptography library to use for cryptographic
-    operations.  Can be `OpenSSL` (http://www.openssl.org),
-    `Libgcrypt` (http://www.gnupg.org/), `WinCNG` (Windows Vista+) or
-    blank to use any library available.
+    operations.  Can be `OpenSSL` (https://www.openssl.org),
+    `Libgcrypt` (https://www.gnupg.org/), `WinCNG` (Windows Vista+),
+    `mbedTLS` (https://tls.mbed.org/) or blank to use any library available.

    CMake will attempt to locate the libraries automatically.  See [2]
    for more information.
@@ -97,6 +105,10 @@ The following options are available:

    Will enable the libssh2_trace() function for showing debug traces.

+ * `CLEAR_MEMORY=ON`
+
+    Securely zero memory before freeing it (if the backend supports this).
+
 Build tools
 -----------

@@ -114,20 +126,27 @@ Tests
 To test the build, run the appropriate test target for your build
 system.  For example:

+```
  cmake --build . --target test
+```
 or
+```
  cmake --build . --target RUN_TESTS
+```

 How do I use libssh2 in my project if my project doesn't use CMake?
 -------------------------------------------------------------------

 If you are not using CMake for your own project, install libssh2
-
+```
  cmake <libssh2 source location>
  cmake --build .
  cmake --build . --target install
+```
 or
+```
  cmake --build . --target INSTALL
+```

 and then specify the install location to your project in the normal
 way for your build environment.  If you don't like the default install
@@ -161,14 +180,14 @@ builds your project:
        Libssh2
        URL <libssh2 download location>
        URL_HASH SHA1=<libssh2 archive SHA1>
-	INSTALL_COMMAND "")
+        INSTALL_COMMAND "")

    ExternalProject_Add(
        MyProject DEPENDS Libssh2
        SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src
        INSTALL_COMMAND "")

-[1] http://www.cmake.org/cmake/resources/software.html
-[2] http://www.cmake.org/cmake/help/v3.0/manual/cmake-packages.7.html
-[3] http://www.cmake.org/cmake/help/v3.0/manual/cmake-packages.7.html#package-registry
-[4] http://www.kitware.com/media/html/BuildingExternalProjectsWithCMake2.8.html
+[1] https://www.cmake.org/cmake/resources/software.html
+[2] https://www.cmake.org/cmake/help/v3.0/manual/cmake-packages.7.html
+[3] https://www.cmake.org/cmake/help/v3.0/manual/cmake-packages.7.html#package-registry
+[4] https://blog.kitware.com/wp-content/uploads/2016/01/kitware_quarterly1009.pdf
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -1,15 +1,17 @@
 # $Id: Makefile.am,v 1.37 2009/03/26 15:41:15 bagder Exp $

-EXTRA_DIST = template.3 BINDINGS INSTALL_AUTOTOOLS INSTALL_CMAKE HACKING TODO	\
- AUTHORS
+EXTRA_DIST = template.3 BINDINGS INSTALL_AUTOTOOLS INSTALL_CMAKE.md HACKING TODO \
+ AUTHORS CMakeLists.txt HACKING-CRYPTO SECURITY.md

 dist_man_MANS = \
 	libssh2_agent_connect.3 \
 	libssh2_agent_disconnect.3 \
 	libssh2_agent_free.3 \
 	libssh2_agent_get_identity.3 \
+	libssh2_agent_get_identity_path.3 \
 	libssh2_agent_init.3 \
 	libssh2_agent_list_identities.3 \
+	libssh2_agent_set_identity_path.3 \
 	libssh2_agent_userauth.3 \
 	libssh2_banner_set.3 \
 	libssh2_base64_decode.3 \
@@ -89,6 +91,7 @@ dist_man_MANS = \
 	libssh2_publickey_remove_ex.3 \
 	libssh2_publickey_shutdown.3 \
 	libssh2_scp_recv.3 \
+	libssh2_scp_recv2.3 \
 	libssh2_scp_send.3 \
 	libssh2_scp_send64.3 \
 	libssh2_scp_send_ex.3 \
@@ -109,6 +112,7 @@ dist_man_MANS = \
 	libssh2_session_init_ex.3 \
 	libssh2_session_last_errno.3 \
 	libssh2_session_last_error.3 \
+	libssh2_session_set_last_error.3 \
 	libssh2_session_method_pref.3 \
 	libssh2_session_methods.3 \
 	libssh2_session_set_blocking.3 \
--- a/docs/Makefile.in
+++ b/docs/Makefile.in
@@ -1,7 +1,7 @@
-# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# Makefile.in generated by automake 1.16.4 from Makefile.am.
 # @configure_input@

-# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.

 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -16,7 +16,17 @@

 # $Id: Makefile.am,v 1.37 2009/03/26 15:41:15 bagder Exp $
 VPATH = @srcdir@
-am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
 am__make_running_with_option = \
  case $${target_option-} in \
      ?) ;; \
@@ -80,8 +90,6 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
 subdir = docs
-DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \
-	$(dist_man_MANS) AUTHORS TODO
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/autobuild.m4 \
 	$(top_srcdir)/m4/lib-ld.m4 $(top_srcdir)/m4/lib-link.m4 \
@@ -91,9 +99,9 @@ am__aclocal_m4_deps = $(top_srcdir)/m4/autobuild.m4 \
 	$(top_srcdir)/acinclude.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON)
 mkinstalldirs = $(install_sh) -d
-CONFIG_HEADER = $(top_builddir)/src/libssh2_config.h \
-	$(top_builddir)/example/libssh2_config.h
+CONFIG_HEADER = $(top_builddir)/src/libssh2_config.h
 CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
 AM_V_P = $(am__v_P_@AM_V@)
@@ -147,6 +155,7 @@ am__installdirs = "$(DESTDIR)$(man3dir)"
 NROFF = nroff
 MANS = $(dist_man_MANS)
 am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+am__DIST_COMMON = $(dist_man_MANS) $(srcdir)/Makefile.in AUTHORS TODO
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
 ALLOCA = @ALLOCA@
@@ -163,6 +172,12 @@ CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CXX = @CXX@
+CXXCPP = @CXXCPP@
+CXXDEPMODE = @CXXDEPMODE@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
@@ -173,12 +188,14 @@ ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
+ETAGS = @ETAGS@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
 HAVE_LIBBCRYPT = @HAVE_LIBBCRYPT@
 HAVE_LIBCRYPT32 = @HAVE_LIBCRYPT32@
 HAVE_LIBGCRYPT = @HAVE_LIBGCRYPT@
+HAVE_LIBMBEDCRYPTO = @HAVE_LIBMBEDCRYPTO@
 HAVE_LIBSSL = @HAVE_LIBSSL@
 HAVE_LIBZ = @HAVE_LIBZ@
 INSTALL = @INSTALL@
@@ -194,6 +211,8 @@ LIBCRYPT32 = @LIBCRYPT32@
 LIBCRYPT32_PREFIX = @LIBCRYPT32_PREFIX@
 LIBGCRYPT = @LIBGCRYPT@
 LIBGCRYPT_PREFIX = @LIBGCRYPT_PREFIX@
+LIBMBEDCRYPTO = @LIBMBEDCRYPTO@
+LIBMBEDCRYPTO_PREFIX = @LIBMBEDCRYPTO_PREFIX@
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LIBSREQUIRED = @LIBSREQUIRED@
@@ -203,14 +222,17 @@ LIBSSL_PREFIX = @LIBSSL_PREFIX@
 LIBTOOL = @LIBTOOL@
 LIBZ = @LIBZ@
 LIBZ_PREFIX = @LIBZ_PREFIX@
+LIB_FUZZING_ENGINE = @LIB_FUZZING_ENGINE@
 LIPO = @LIPO@
 LN_S = @LN_S@
 LTLIBBCRYPT = @LTLIBBCRYPT@
 LTLIBCRYPT32 = @LTLIBCRYPT32@
 LTLIBGCRYPT = @LTLIBGCRYPT@
+LTLIBMBEDCRYPTO = @LTLIBMBEDCRYPTO@
 LTLIBOBJS = @LTLIBOBJS@
 LTLIBSSL = @LTLIBSSL@
 LTLIBZ = @LTLIBZ@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
 MAINT = @MAINT@
 MAKEINFO = @MAKEINFO@
 MANIFEST_TOOL = @MANIFEST_TOOL@
@@ -242,6 +264,7 @@ abs_top_builddir = @abs_top_builddir@
 abs_top_srcdir = @abs_top_srcdir@
 ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
+ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
@@ -280,6 +303,7 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@@ -288,16 +312,18 @@ target_alias = @target_alias@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-EXTRA_DIST = template.3 BINDINGS INSTALL_AUTOTOOLS INSTALL_CMAKE HACKING TODO	\
- AUTHORS
+EXTRA_DIST = template.3 BINDINGS INSTALL_AUTOTOOLS INSTALL_CMAKE.md HACKING TODO \
+ AUTHORS CMakeLists.txt HACKING-CRYPTO SECURITY.md

 dist_man_MANS = \
 	libssh2_agent_connect.3 \
 	libssh2_agent_disconnect.3 \
 	libssh2_agent_free.3 \
 	libssh2_agent_get_identity.3 \
+	libssh2_agent_get_identity_path.3 \
 	libssh2_agent_init.3 \
 	libssh2_agent_list_identities.3 \
+	libssh2_agent_set_identity_path.3 \
 	libssh2_agent_userauth.3 \
 	libssh2_banner_set.3 \
 	libssh2_base64_decode.3 \
@@ -377,6 +403,7 @@ dist_man_MANS = \
 	libssh2_publickey_remove_ex.3 \
 	libssh2_publickey_shutdown.3 \
 	libssh2_scp_recv.3 \
+	libssh2_scp_recv2.3 \
 	libssh2_scp_send.3 \
 	libssh2_scp_send64.3 \
 	libssh2_scp_send_ex.3 \
@@ -397,6 +424,7 @@ dist_man_MANS = \
 	libssh2_session_init_ex.3 \
 	libssh2_session_last_errno.3 \
 	libssh2_session_last_error.3 \
+	libssh2_session_set_last_error.3 \
 	libssh2_session_method_pref.3 \
 	libssh2_session_methods.3 \
 	libssh2_session_set_blocking.3 \
@@ -475,14 +503,13 @@ $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__confi
 	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign docs/Makefile'; \
 	$(am__cd) $(top_srcdir) && \
 	  $(AUTOMAKE) --foreign docs/Makefile
-.PRECIOUS: Makefile
 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	@case '$?' in \
 	  *config.status*) \
 	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
 	  *) \
-	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
-	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
 	esac;

 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
@@ -548,8 +575,10 @@ ctags CTAGS:

 cscope cscopelist:

+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am

-distdir: $(DISTFILES)
+distdir-am: $(DISTFILES)
 	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
 	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
 	list='$(DISTFILES)'; \
@@ -699,6 +728,8 @@ uninstall-man: uninstall-man3
 	ps ps-am tags-am uninstall uninstall-am uninstall-man \
 	uninstall-man3

+.PRECIOUS: Makefile
+

 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
--- a/docs/SECURITY.md
+++ b/docs/SECURITY.md
@@ -0,0 +1,100 @@
+libssh2 security
+================
+
+This document is intended to provide guidance on how security vulnerabilities
+should be handled in the libssh2 project.
+
+Publishing Information
+----------------------
+
+All known and public libssh2 vulnerabilities will be listed on [the libssh2
+web site](https://www.libssh2.org/).
+
+Security vulnerabilities should not be entered in the project's public bug
+tracker unless the necessary configuration is in place to limit access to the
+issue to only the reporter and the project's security team.
+
+Vulnerability Handling
+----------------------
+
+The typical process for handling a new security vulnerability is as follows.
+
+No information should be made public about a vulnerability until it is
+formally announced at the end of this process. That means, for example that a
+bug tracker entry must NOT be created to track the issue since that will make
+the issue public and it should not be discussed on the project's public
+mailing list. Also messages associated with any commits should not make any
+reference to the security nature of the commit if done prior to the public
+announcement.
+
+- The person discovering the issue, the reporter, reports the vulnerability
+  privately to `libssh2-security@haxx.se`. That's an email alias that reaches a
+  handful of selected and trusted people.
+
+- Messages that do not relate to the reporting or managing of an undisclosed
+  security vulnerability in libssh2 are ignored and no further action is
+  required.
+
+- A person in the security team sends an e-mail to the original reporter to
+  acknowledge the report.
+
+- The security team investigates the report and either rejects it or accepts
+  it.
+
+- If the report is rejected, the team writes to the reporter to explain why.
+
+- If the report is accepted, the team writes to the reporter to let him/her
+  know it is accepted and that they are working on a fix.
+
+- The security team discusses the problem, works out a fix, considers the
+  impact of the problem and suggests a release schedule. This discussion
+  should involve the reporter as much as possible.
+
+- The release of the information should be "as soon as possible" and is most
+  often synced with an upcoming release that contains the fix. If the
+  reporter, or anyone else, thinks the next planned release is too far away
+  then a separate earlier release for security reasons should be considered.
+
+- Write a security advisory draft about the problem that explains what the
+  problem is, its impact, which versions it affects, solutions or
+  workarounds, when the release is out and make sure to credit all
+  contributors properly.
+
+- Request a CVE number from
+  [distros@openwall](http://oss-security.openwall.org/wiki/mailing-lists/distros)
+  when also informing and preparing them for the upcoming public security
+  vulnerability announcement - attach the advisory draft for information. Note
+  that 'distros' won't accept an embargo longer than 14 days.
+
+- Update the "security advisory" with the CVE number.
+
+- The security team commits the fix in a private branch. The commit message
+  should ideally contain the CVE number. This fix is usually also distributed
+  to the 'distros' mailing list to allow them to use the fix prior to the
+  public announcement.
+
+- At the day of the next release, the private branch is merged into the master
+  branch and pushed. Once pushed, the information is accessible to the public
+  and the actual release should follow suit immediately afterwards.
+
+- The project team creates a release that includes the fix.
+
+- The project team announces the release and the vulnerability to the world in
+  the same manner we always announce releases. It gets sent to the libssh2
+  mailing list and the oss-security mailing list.
+
+- The security web page on the web site should get the new vulnerability
+  mentioned.
+
+LIBSSH2-SECURITY (at haxx dot se)
+--------------------------------
+
+Who is on this list? There are a couple of criteria you must meet, and then we
+might ask you to join the list or you can ask to join it. It really isn't very
+formal. We basically only require that you have a long-term presence in the
+libssh2 project and you have shown an understanding for the project and its way
+of working. You must've been around for a good while and you should have no
+plans in vanishing in the near future.
+
+We do not make the list of participants public mostly because it tends to vary
+somewhat over time and a list somewhere will only risk getting outdated.
--- a/docs/libssh2_agent_get_identity_path.3
+++ b/docs/libssh2_agent_get_identity_path.3
@@ -0,0 +1,22 @@
+.\"
+.\" Copyright (c) 2019 by Will Cosgrove
+.\"
+.TH libssh2_agent_get_identity_path 3 "6 Mar 2019" "libssh2 1.9" "libssh2 manual"
+.SH NAME
+libssh2_agent_get_identity_path - gets the custom ssh-agent socket path
+.SH SYNOPSIS
+#include <libssh2.h>
+
+const char *
+libssh2_agent_get_identity_path(LIBSSH2_AGENT *agent);
+.SH DESCRIPTION
+Returns the custom agent identity socket path if set using libssh2_agent_set_identity_path()
+
+.SH RETURN VALUE
+Returns the socket path on disk.
+.SH AVAILABILITY
+Added in libssh2 1.9
+.SH SEE ALSO
+.BR libssh2_agent_init(3)
+.BR libssh2_agent_set_identity_path(3)
+
--- a/docs/libssh2_agent_set_identity_path.3
+++ b/docs/libssh2_agent_set_identity_path.3
@@ -0,0 +1,22 @@
+.\"
+.\" Copyright (c) 2019 by Will Cosgrove
+.\"
+.TH libssh2_agent_set_identity_path 3 "6 Mar 2019" "libssh2 1.9" "libssh2 manual"
+.SH NAME
+libssh2_agent_set_identity_path - set an ssh-agent socket path on disk
+.SH SYNOPSIS
+#include <libssh2.h>
+
+void
+libssh2_agent_set_identity_path(LIBSSH2_AGENT *agent, const char *path);
+.SH DESCRIPTION
+Allows a custom agent identity socket path instead of the default SSH_AUTH_SOCK env value
+
+.SH RETURN VALUE
+Returns void
+.SH AVAILABILITY
+Added in libssh2 1.9
+.SH SEE ALSO
+.BR libssh2_agent_init(3)
+.BR libssh2_agent_get_identity_path(3)
+
--- a/docs/libssh2_channel_wait_eof.3
+++ b/docs/libssh2_channel_wait_eof.3
@@ -8,7 +8,7 @@ int
 libssh2_channel_wait_eof(LIBSSH2_CHANNEL *channel);

 .SH DESCRIPTION
-Wait for the remote end to acknowledge an EOF request.
+Wait for the remote end to send EOF.

 .SH RETURN VALUE
 Return 0 on success or negative on failure. It returns
--- a/docs/libssh2_hostkey_hash.3
+++ b/docs/libssh2_hostkey_hash.3
@@ -11,12 +11,12 @@ libssh2_hostkey_hash(LIBSSH2_SESSION *session, int hash_type);
 \fIsession\fP - Session instance as returned by 
 .BR libssh2_session_init_ex(3)

-\fIhash_type\fP - One of: \fBLIBSSH2_HOSTKEY_HASH_MD5\fP or 
-\fBLIBSSH2_HOSTKEY_HASH_SHA1\fP.
+\fIhash_type\fP - One of: \fBLIBSSH2_HOSTKEY_HASH_MD5\fP, 
+\fBLIBSSH2_HOSTKEY_HASH_SHA1\fP or \fBLIBSSH2_HOSTKEY_HASH_SHA256\fP.

 Returns the computed digest of the remote system's hostkey. The length of 
 the returned string is hash_type specific (e.g. 16 bytes for MD5, 
-20 bytes for SHA1).
+20 bytes for SHA1, 32 bytes for SHA256).
 .SH RETURN VALUE
 Computed hostkey hash value, or NULL if the information is not available
 (either the session has not yet been started up, or the requested hash
--- a/docs/libssh2_scp_recv.3
+++ b/docs/libssh2_scp_recv.3
@@ -8,6 +8,9 @@ LIBSSH2_CHANNEL *
 libssh2_scp_recv(LIBSSH2_SESSION *session, const char *path, struct stat *sb);

 .SH DESCRIPTION
+This function is \fBDEPRECATED\fP. Use \fIlibssh2_scp_recv2(3)\fP
+instead!
+
 \fIsession\fP - Session instance as returned by 
 .BR libssh2_session_init_ex(3)

--- a/docs/libssh2_scp_recv2.3
+++ b/docs/libssh2_scp_recv2.3
@@ -0,0 +1,32 @@
+.TH libssh2_scp_recv2 3 "29 Jun 2015" "libssh2 1.6.1" "libssh2 manual"
+.SH NAME
+libssh2_scp_recv2 - request a remote file via SCP
+.SH SYNOPSIS
+#include <libssh2.h>
+
+LIBSSH2_CHANNEL *
+libssh2_scp_recv2(LIBSSH2_SESSION *session, const char *path, struct_stat *sb);
+
+.SH DESCRIPTION
+\fIsession\fP - Session instance as returned by 
+.BR libssh2_session_init_ex(3)
+
+\fIpath\fP - Full path and filename of file to transfer. That is the remote
+file name.
+
+\fIsb\fP - Populated with remote file's size, mode, mtime, and atime
+
+Request a file from the remote host via SCP.
+.SH RETURN VALUE
+Pointer to a newly allocated LIBSSH2_CHANNEL instance, or NULL on errors.
+.SH ERRORS
+\fILIBSSH2_ERROR_ALLOC\fP -  An internal memory allocation call failed.
+
+\fILIBSSH2_ERROR_SCP_PROTOCOL\fP - 
+
+\fILIBSSH2_ERROR_EAGAIN\fP - Marked for non-blocking I/O but the call would
+block.
+.SH SEE ALSO
+.BR libssh2_session_init_ex(3)
+.BR libssh2_channel_open_ex(3)
+
--- a/docs/libssh2_session_callback_set.3
+++ b/docs/libssh2_session_callback_set.3
@@ -32,11 +32,43 @@ function returns 0, the packet will be accepted nonetheless.
 .IP LIBSSH2_CALLBACK_X11
 Called when an X11 connection has been accepted
 .IP LIBSSH2_CALLBACK_SEND
-Called when libssh2 wants to send some data on the connection.
-Can be set to a custom function to handle I/O your own way.
+Called when libssh2 wants to send data on the connection.  Can be set to a
+custom function to handle I/O your own way.
+
+The prototype of the callback:
+
+.nf
+ssize_t sendcb(libssh2_socket_t sockfd, const void *buffer,
+               size_t length, int flags, void **abstract);
+.fi
+
+\fBsockfd\fP is the socket to write to, \fBbuffer\fP points to the data to
+send, \fBlength\fP is the size of the data, \fBflags\fP is the flags that
+would've been used to a \fIsend()\fP call and \fBabstract\fP is a pointer to
+the abstract pointer set in the \fIlibssh2_session_init_ex(3)\fP call.
+
+The callback returns the number of bytes sent, or -1 for error. The special
+return code \fB-EAGAIN\fP can be returned to signal that the send was aborted
+to prevent getting blocked and it needs to be called again.
 .IP LIBSSH2_CALLBACK_RECV
-Called when libssh2 wants to receive some data from the connection.
-Can be set to a custom function to handle I/O your own way.
+Called when libssh2 wants to read data from the connection. Can be set to a
+custom function to handle I/O your own way.
+
+The prototype of the callback:
+
+.nf
+ssize_t recvcb(libssh2_socket_t sockfd, void *buffer,
+               size_t length, int flags, void **abstract);
+.fi
+
+\fBsockfd\fP is the socket to read from, \fBbuffer\fP where to store received
+data into, \fBlength\fP is the size of the buffer, \fBflags\fP is the flags
+that would've been used to a \fIrecv()\fP call and \fBabstract\fP is a pointer
+to the abstract pointer set in the \fIlibssh2_session_init_ex(3)\fP call.
+
+The callback returns the number of bytes read, or -1 for error. The special
+return code \fB-EAGAIN\fP can be returned to signal that the read was aborted
+to prevent getting blocked and it needs to be called again.
 .SH RETURN VALUE
 Pointer to previous callback handler. Returns NULL if no prior callback
 handler was set or the callback type was unknown.
--- a/docs/libssh2_session_last_errno.3
+++ b/docs/libssh2_session_last_errno.3
@@ -18,3 +18,4 @@ Numeric error code corresponding to the the Error Code constants.

 .SH SEE ALSO
 .BR libssh2_session_last_error(3)
+.BR libssh2_session_set_last_error(3)
--- a/docs/libssh2_session_last_error.3
+++ b/docs/libssh2_session_last_error.3
@@ -29,3 +29,4 @@ Numeric error code corresponding to the the Error Code constants.

 .SH SEE ALSO
 .BR libssh2_session_last_errno(3)
+.BR libssh2_session_set_last_error(3)
--- a/docs/libssh2_session_set_last_error.3
+++ b/docs/libssh2_session_set_last_error.3
@@ -0,0 +1,33 @@
+.TH libssh2_session_set_last_error 3 "26 Oct 2015" "libssh2 1.6.1" "libssh2 manual"
+.SH NAME
+libssh2_session_set_last_error - sets the internal error state
+.SH SYNOPSIS
+#include <libssh2.h>
+
+int
+libssh2_session_set_last_error(LIBSSH2_SESSION *session, int errcode, const char *errmsg)
+
+.SH DESCRIPTION
+\fIsession\fP - Session instance as returned by
+.BR libssh2_session_init_ex(3)
+
+\fIerrcode\fP - One of the error codes as defined in the public
+libssh2 header file.
+
+\fIerrmsg\fP - If not NULL, a copy of the given string is stored
+inside the session object as the error message.
+
+This function is provided for high level language wrappers
+(i.e. Python or Perl) and other libraries that may extend libssh2 with
+additional features while still relying on its error reporting
+mechanism.
+
+.SH RETURN VALUE
+Numeric error code corresponding to the the Error Code constants.
+
+.SH AVAILABILITY
+Added in 1.6.1
+
+.SH SEE ALSO
+.BR libssh2_session_last_error(3)
+.BR libssh2_session_last_errno(3)
--- a/docs/libssh2_session_supported_algs.3
+++ b/docs/libssh2_session_supported_algs.3
@@ -10,9 +10,9 @@ int libssh2_session_supported_algs(LIBSSH2_SESSION* session,
                                   const char*** algs);
 .SH DESCRIPTION
 \fIsession\fP - An instance of initialized LIBSSH2_SESSION (the function will
-use its pointer to the memory allocation function).  \fImethod_type\fP - Method
-type. See .BR \fIlibssh2_session_method_pref(3)\fP.  \fIalgs\fP - Address of a
-pointer that will point to an array of returned algorithms
+use its pointer to the memory allocation function).  \fImethod_type\fP -
+Method type. See \fIlibssh2_session_method_pref(3)\fP.  \fIalgs\fP - Address
+of a pointer that will point to an array of returned algorithms

 Get a list of supported algorithms for the given \fImethod_type\fP. The
 method_type parameter is equivalent to method_type in
@@ -44,9 +44,9 @@ rc = libssh2_session_supported_algs(session,
 if (rc>0) {
    /* the call succeeded, do sth. with the list of algorithms
       (e.g. list them)... */
-    printf("Supported symmetric algorithms:\n");
+    printf("Supported symmetric algorithms:\\n");
    for ( i=0; i<rc; i++ )
-        printf("\t%s\n", algorithms[i]);
+        printf("\\t%s\\n", algorithms[i]);

    /* ... and free the allocated memory when not needed anymore */
    libssh2_free(session, algorithms);
--- a/docs/libssh2_sftp_get_channel.3
+++ b/docs/libssh2_sftp_get_channel.3
@@ -1,21 +1,21 @@
-.TH libssh2_sftp_get_channel 3 "9 Sep 2011" "libssh2 1.4.0" "libssh2 manual"
-.SH NAME
-libssh2_sftp_get_channel - return the channel of sftp
-.SH SYNOPSIS
-.nf
-#include <libssh2.h>
-#include <libssh2_sftp.h>
-
-.fi
-LIBSSH2_CHANNEL *libssh2_sftp_get_channel(LIBSSH2_SFTP *sftp);
-.SH DESCRIPTION
-\fIsftp\fP - SFTP instance as returned by 
-.BR libssh2_sftp_init(3)
-
-Return the channel of the given sftp handle.
-.SH RETURN VALUE
-The channel of the SFTP instance or NULL if something was wrong.
-.SH AVAILABILITY
-Added in 1.4.0
-.SH SEE ALSO
-.BR libssh2_sftp_init(3)
+.TH libssh2_sftp_get_channel 3 "9 Sep 2011" "libssh2 1.4.0" "libssh2 manual"
+.SH NAME
+libssh2_sftp_get_channel - return the channel of sftp
+.SH SYNOPSIS
+.nf
+#include <libssh2.h>
+#include <libssh2_sftp.h>
+
+.fi
+LIBSSH2_CHANNEL *libssh2_sftp_get_channel(LIBSSH2_SFTP *sftp);
+.SH DESCRIPTION
+\fIsftp\fP - SFTP instance as returned by
+.BR libssh2_sftp_init(3)
+
+Return the channel of the given sftp handle.
+.SH RETURN VALUE
+The channel of the SFTP instance or NULL if something was wrong.
+.SH AVAILABILITY
+Added in 1.4.0
+.SH SEE ALSO
+.BR libssh2_sftp_init(3)
--- a/example/CMakeLists.txt
+++ b/example/CMakeLists.txt
@@ -0,0 +1,101 @@
+# Copyright (c) 2014, 2015 Alexander Lamaison <alexander.lamaison@gmail.com>
+#
+# Redistribution and use in source and binary forms,
+# with or without modification, are permitted provided
+# that the following conditions are met:
+#
+#   Redistributions of source code must retain the above
+#   copyright notice, this list of conditions and the
+#   following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above
+#   copyright notice, this list of conditions and the following
+#   disclaimer in the documentation and/or other materials
+#   provided with the distribution.
+#
+#   Neither the name of the copyright holder nor the names
+#   of any other contributors may be used to endorse or
+#   promote products derived from this software without
+#   specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+
+include(CheckIncludeFiles)
+include(CheckSymbolExists)
+include(CopyRuntimeDependencies)
+include(SocketLibraries)
+
+set(EXAMPLES
+  direct_tcpip
+  ssh2
+  scp
+  scp_nonblock
+  scp_write
+  scp_write_nonblock
+  sftp
+  sftp_nonblock
+  sftp_write
+  sftp_write_nonblock
+  sftp_mkdir
+  sftp_mkdir_nonblock
+  sftp_RW_nonblock
+  sftp_write_sliding
+  sftpdir
+  sftpdir_nonblock
+  ssh2_exec
+  ssh2_agent
+  ssh2_agent_forwarding
+  ssh2_echo
+  sftp_append
+  subsystem_netconf
+  tcpip-forward)
+
+append_needed_socket_libraries(LIBRARIES)
+
+foreach(example ${EXAMPLES})
+  add_executable(example-${example} ${example}.c)
+  list(APPEND EXAMPLE_TARGETS example-${example})
+  # to find generated header
+  target_include_directories(example-${example} PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+  target_link_libraries(example-${example} libssh2 ${LIBRARIES})
+endforeach()
+add_target_to_copy_dependencies(
+  TARGET copy_example_dependencies
+  DEPENDENCIES ${RUNTIME_DEPENDENCIES}
+  BEFORE_TARGETS ${EXAMPLE_TARGETS})
+
+## Platform checks
+check_include_files(inttypes.h HAVE_INTTYPES_H)
+check_include_files(unistd.h HAVE_UNISTD_H)
+check_include_files(stdlib.h HAVE_STDLIB_H)
+check_include_files(sys/select.h HAVE_SYS_SELECT_H)
+check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
+check_include_files(sys/time.h HAVE_SYS_TIME_H)
+check_include_files(arpa/inet.h HAVE_ARPA_INET_H)
+check_include_files(netinet/in.h HAVE_NETINET_IN_H)
+check_include_files(winsock2.h HAVE_WINSOCK2_H)
+
+check_symbol_exists(strcasecmp strings.h HAVE_STRCASECMP)
+check_symbol_exists(_stricmp string.h HAVE__STRICMP)
+check_symbol_exists(snprintf stdio.h HAVE_SNPRINTF)
+check_symbol_exists(_snprintf stdio.h HAVE__SNPRINTF)
+
+check_symbol_exists(__func__ "" HAVE___FUNC__)
+check_symbol_exists(__FUNCTION__ "" HAVE___FUNCTION__)
+
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/libssh2_config_cmake.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/libssh2_config.h)
--- a/example/Makefile.am
+++ b/example/Makefile.am
@@ -1,17 +1,17 @@
 AUTOMAKE_OPTIONS = foreign nostdinc

-EXTRA_DIST = libssh2_config.h.in
+EXTRA_DIST = libssh2_config.h.in libssh2_config_cmake.h.in CMakeLists.txt

 # samples
 noinst_PROGRAMS = direct_tcpip ssh2 scp scp_nonblock scp_write		\
 scp_write_nonblock sftp sftp_nonblock sftp_write sftp_write_nonblock	\
 sftp_mkdir sftp_mkdir_nonblock sftp_RW_nonblock sftp_write_sliding	\
- sftpdir sftpdir_nonblock ssh2_exec ssh2_agent ssh2_echo sftp_append	\
- subsystem_netconf tcpip-forward
+ sftpdir sftpdir_nonblock ssh2_exec ssh2_agent ssh2_agent_forwarding \
+ ssh2_echo sftp_append subsystem_netconf tcpip-forward

 if HAVE_SYS_UN_H
 noinst_PROGRAMS += x11
 endif

-AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/example
+AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/example -I../src
 LDADD = $(top_builddir)/src/libssh2.la
--- a/example/Makefile.in
+++ b/example/Makefile.in
@@ -1,7 +1,7 @@
-# Makefile.in generated by automake 1.14.1 from Makefile.am.
+# Makefile.in generated by automake 1.16.4 from Makefile.am.
 # @configure_input@

-# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.

 # This Makefile.in is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -15,7 +15,17 @@
@SET_MAKE@

 VPATH = @srcdir@
-am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)'
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
 am__make_running_with_option = \
  case $${target_option-} in \
      ?) ;; \
@@ -86,13 +96,12 @@ noinst_PROGRAMS = direct_tcpip$(EXEEXT) ssh2$(EXEEXT) scp$(EXEEXT) \
 	sftp_mkdir_nonblock$(EXEEXT) sftp_RW_nonblock$(EXEEXT) \
 	sftp_write_sliding$(EXEEXT) sftpdir$(EXEEXT) \
 	sftpdir_nonblock$(EXEEXT) ssh2_exec$(EXEEXT) \
-	ssh2_agent$(EXEEXT) ssh2_echo$(EXEEXT) sftp_append$(EXEEXT) \
+	ssh2_agent$(EXEEXT) ssh2_agent_forwarding$(EXEEXT) \
+	ssh2_echo$(EXEEXT) sftp_append$(EXEEXT) \
 	subsystem_netconf$(EXEEXT) tcpip-forward$(EXEEXT) \
 	$(am__EXEEXT_1)
@HAVE_SYS_UN_H_TRUE@am__append_1 = x11
 subdir = example
-DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \
-	$(srcdir)/libssh2_config.h.in $(top_srcdir)/depcomp
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/autobuild.m4 \
 	$(top_srcdir)/m4/lib-ld.m4 $(top_srcdir)/m4/lib-link.m4 \
@@ -102,8 +111,9 @@ am__aclocal_m4_deps = $(top_srcdir)/m4/autobuild.m4 \
 	$(top_srcdir)/acinclude.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON)
 mkinstalldirs = $(install_sh) -d
-CONFIG_HEADER = $(top_builddir)/src/libssh2_config.h libssh2_config.h
+CONFIG_HEADER = $(top_builddir)/src/libssh2_config.h
 CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
@HAVE_SYS_UN_H_TRUE@am__EXEEXT_1 = x11$(EXEEXT)
@@ -184,6 +194,10 @@ ssh2_agent_SOURCES = ssh2_agent.c
 ssh2_agent_OBJECTS = ssh2_agent.$(OBJEXT)
 ssh2_agent_LDADD = $(LDADD)
 ssh2_agent_DEPENDENCIES = $(top_builddir)/src/libssh2.la
+ssh2_agent_forwarding_SOURCES = ssh2_agent_forwarding.c
+ssh2_agent_forwarding_OBJECTS = ssh2_agent_forwarding.$(OBJEXT)
+ssh2_agent_forwarding_LDADD = $(LDADD)
+ssh2_agent_forwarding_DEPENDENCIES = $(top_builddir)/src/libssh2.la
 ssh2_echo_SOURCES = ssh2_echo.c
 ssh2_echo_OBJECTS = ssh2_echo.$(OBJEXT)
 ssh2_echo_LDADD = $(LDADD)
@@ -218,7 +232,20 @@ am__v_at_0 = @
 am__v_at_1 = 
 DEFAULT_INCLUDES = 
 depcomp = $(SHELL) $(top_srcdir)/depcomp
-am__depfiles_maybe = depfiles
+am__maybe_remake_depfiles = depfiles
+am__depfiles_remade = ./$(DEPDIR)/direct_tcpip.Po ./$(DEPDIR)/scp.Po \
+	./$(DEPDIR)/scp_nonblock.Po ./$(DEPDIR)/scp_write.Po \
+	./$(DEPDIR)/scp_write_nonblock.Po ./$(DEPDIR)/sftp.Po \
+	./$(DEPDIR)/sftp_RW_nonblock.Po ./$(DEPDIR)/sftp_append.Po \
+	./$(DEPDIR)/sftp_mkdir.Po ./$(DEPDIR)/sftp_mkdir_nonblock.Po \
+	./$(DEPDIR)/sftp_nonblock.Po ./$(DEPDIR)/sftp_write.Po \
+	./$(DEPDIR)/sftp_write_nonblock.Po \
+	./$(DEPDIR)/sftp_write_sliding.Po ./$(DEPDIR)/sftpdir.Po \
+	./$(DEPDIR)/sftpdir_nonblock.Po ./$(DEPDIR)/ssh2.Po \
+	./$(DEPDIR)/ssh2_agent.Po ./$(DEPDIR)/ssh2_agent_forwarding.Po \
+	./$(DEPDIR)/ssh2_echo.Po ./$(DEPDIR)/ssh2_exec.Po \
+	./$(DEPDIR)/subsystem_netconf.Po ./$(DEPDIR)/tcpip-forward.Po \
+	./$(DEPDIR)/x11.Po
 am__mv = mv -f
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
@@ -242,21 +269,22 @@ SOURCES = direct_tcpip.c scp.c scp_nonblock.c scp_write.c \
 	scp_write_nonblock.c sftp.c sftp_RW_nonblock.c sftp_append.c \
 	sftp_mkdir.c sftp_mkdir_nonblock.c sftp_nonblock.c \
 	sftp_write.c sftp_write_nonblock.c sftp_write_sliding.c \
-	sftpdir.c sftpdir_nonblock.c ssh2.c ssh2_agent.c ssh2_echo.c \
-	ssh2_exec.c subsystem_netconf.c tcpip-forward.c x11.c
+	sftpdir.c sftpdir_nonblock.c ssh2.c ssh2_agent.c \
+	ssh2_agent_forwarding.c ssh2_echo.c ssh2_exec.c \
+	subsystem_netconf.c tcpip-forward.c x11.c
 DIST_SOURCES = direct_tcpip.c scp.c scp_nonblock.c scp_write.c \
 	scp_write_nonblock.c sftp.c sftp_RW_nonblock.c sftp_append.c \
 	sftp_mkdir.c sftp_mkdir_nonblock.c sftp_nonblock.c \
 	sftp_write.c sftp_write_nonblock.c sftp_write_sliding.c \
-	sftpdir.c sftpdir_nonblock.c ssh2.c ssh2_agent.c ssh2_echo.c \
-	ssh2_exec.c subsystem_netconf.c tcpip-forward.c x11.c
+	sftpdir.c sftpdir_nonblock.c ssh2.c ssh2_agent.c \
+	ssh2_agent_forwarding.c ssh2_echo.c ssh2_exec.c \
+	subsystem_netconf.c tcpip-forward.c x11.c
 am__can_run_installinfo = \
  case $$AM_UPDATE_INFO_DIR in \
    n|no|NO) false;; \
    *) (install-info --version) >/dev/null 2>&1;; \
  esac
-am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) \
-	$(LISP)libssh2_config.h.in
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
 # Read a list of newline-separated strings from the standard input,
 # and print each of them once, without duplicates.  Input order is
 # *not* preserved.
@@ -273,8 +301,7 @@ am__define_uniq_tagged_files = \
  unique=`for i in $$list; do \
    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
  done | $(am__uniquify_input)`
-ETAGS = etags
-CTAGS = ctags
+am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/depcomp
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
 ALLOCA = @ALLOCA@
@@ -291,6 +318,12 @@ CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
+CSCOPE = @CSCOPE@
+CTAGS = @CTAGS@
+CXX = @CXX@
+CXXCPP = @CXXCPP@
+CXXDEPMODE = @CXXDEPMODE@
+CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
@@ -301,12 +334,14 @@ ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
+ETAGS = @ETAGS@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
 GREP = @GREP@
 HAVE_LIBBCRYPT = @HAVE_LIBBCRYPT@
 HAVE_LIBCRYPT32 = @HAVE_LIBCRYPT32@
 HAVE_LIBGCRYPT = @HAVE_LIBGCRYPT@
+HAVE_LIBMBEDCRYPTO = @HAVE_LIBMBEDCRYPTO@
 HAVE_LIBSSL = @HAVE_LIBSSL@
 HAVE_LIBZ = @HAVE_LIBZ@
 INSTALL = @INSTALL@
@@ -322,6 +357,8 @@ LIBCRYPT32 = @LIBCRYPT32@
 LIBCRYPT32_PREFIX = @LIBCRYPT32_PREFIX@
 LIBGCRYPT = @LIBGCRYPT@
 LIBGCRYPT_PREFIX = @LIBGCRYPT_PREFIX@
+LIBMBEDCRYPTO = @LIBMBEDCRYPTO@
+LIBMBEDCRYPTO_PREFIX = @LIBMBEDCRYPTO_PREFIX@
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LIBSREQUIRED = @LIBSREQUIRED@
@@ -331,14 +368,17 @@ LIBSSL_PREFIX = @LIBSSL_PREFIX@
 LIBTOOL = @LIBTOOL@
 LIBZ = @LIBZ@
 LIBZ_PREFIX = @LIBZ_PREFIX@
+LIB_FUZZING_ENGINE = @LIB_FUZZING_ENGINE@
 LIPO = @LIPO@
 LN_S = @LN_S@
 LTLIBBCRYPT = @LTLIBBCRYPT@
 LTLIBCRYPT32 = @LTLIBCRYPT32@
 LTLIBGCRYPT = @LTLIBGCRYPT@
+LTLIBMBEDCRYPTO = @LTLIBMBEDCRYPTO@
 LTLIBOBJS = @LTLIBOBJS@
 LTLIBSSL = @LTLIBSSL@
 LTLIBZ = @LTLIBZ@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
 MAINT = @MAINT@
 MAKEINFO = @MAKEINFO@
 MANIFEST_TOOL = @MANIFEST_TOOL@
@@ -370,6 +410,7 @@ abs_top_builddir = @abs_top_builddir@
 abs_top_srcdir = @abs_top_srcdir@
 ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
+ac_ct_CXX = @ac_ct_CXX@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
@@ -408,6 +449,7 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@@ -417,11 +459,10 @@ top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = foreign nostdinc
-EXTRA_DIST = libssh2_config.h.in
-AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/example
+EXTRA_DIST = libssh2_config.h.in libssh2_config_cmake.h.in CMakeLists.txt
+AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/example -I../src
 LDADD = $(top_builddir)/src/libssh2.la
-all: libssh2_config.h
-	$(MAKE) $(AM_MAKEFLAGS) all-am
+all: all-am

 .SUFFIXES:
 .SUFFIXES: .c .lo .o .obj
@@ -437,14 +478,13 @@ $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__confi
 	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign example/Makefile'; \
 	$(am__cd) $(top_srcdir) && \
 	  $(AUTOMAKE) --foreign example/Makefile
-.PRECIOUS: Makefile
 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	@case '$?' in \
 	  *config.status*) \
 	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
 	  *) \
-	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
-	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
 	esac;

 $(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
@@ -456,17 +496,6 @@ $(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
 	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
 $(am__aclocal_m4_deps):

-libssh2_config.h: stamp-h2
-	@test -f $@ || rm -f stamp-h2
-	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) stamp-h2
-
-stamp-h2: $(srcdir)/libssh2_config.h.in $(top_builddir)/config.status
-	@rm -f stamp-h2
-	cd $(top_builddir) && $(SHELL) ./config.status example/libssh2_config.h
-
-distclean-hdr:
-	-rm -f libssh2_config.h stamp-h2
-
 clean-noinstPROGRAMS:
 	@list='$(noinst_PROGRAMS)'; test -n "$$list" || exit 0; \
 	echo " rm -f" $$list; \
@@ -548,6 +577,10 @@ ssh2_agent$(EXEEXT): $(ssh2_agent_OBJECTS) $(ssh2_agent_DEPENDENCIES) $(EXTRA_ss
 	@rm -f ssh2_agent$(EXEEXT)
 	$(AM_V_CCLD)$(LINK) $(ssh2_agent_OBJECTS) $(ssh2_agent_LDADD) $(LIBS)

+ssh2_agent_forwarding$(EXEEXT): $(ssh2_agent_forwarding_OBJECTS) $(ssh2_agent_forwarding_DEPENDENCIES) $(EXTRA_ssh2_agent_forwarding_DEPENDENCIES) 
+	@rm -f ssh2_agent_forwarding$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(ssh2_agent_forwarding_OBJECTS) $(ssh2_agent_forwarding_LDADD) $(LIBS)
+
 ssh2_echo$(EXEEXT): $(ssh2_echo_OBJECTS) $(ssh2_echo_DEPENDENCIES) $(EXTRA_ssh2_echo_DEPENDENCIES) 
 	@rm -f ssh2_echo$(EXEEXT)
 	$(AM_V_CCLD)$(LINK) $(ssh2_echo_OBJECTS) $(ssh2_echo_LDADD) $(LIBS)
@@ -574,29 +607,36 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c

-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/direct_tcpip.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp_write.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp_write_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_RW_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_append.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_mkdir.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_mkdir_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_write.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_write_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_write_sliding.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftpdir.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftpdir_nonblock.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_agent.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_echo.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_exec.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/subsystem_netconf.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tcpip-forward.Po@am__quote@
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/x11.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/direct_tcpip.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp_write.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/scp_write_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_RW_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_append.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_mkdir.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_mkdir_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_write.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_write_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftp_write_sliding.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftpdir.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sftpdir_nonblock.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_agent.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_agent_forwarding.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_echo.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ssh2_exec.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/subsystem_netconf.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tcpip-forward.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/x11.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)

 .c.o:
@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
@@ -676,8 +716,10 @@ cscopelist-am: $(am__tagged_files)

 distclean-tags:
 	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am

-distdir: $(DISTFILES)
+distdir-am: $(DISTFILES)
 	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
 	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
 	list='$(DISTFILES)'; \
@@ -709,7 +751,7 @@ distdir: $(DISTFILES)
 	done
 check-am: all-am
 check: check-am
-all-am: Makefile $(PROGRAMS) libssh2_config.h
+all-am: Makefile $(PROGRAMS)
 installdirs:
 install: install-am
 install-exec: install-exec-am
@@ -747,10 +789,33 @@ clean-am: clean-generic clean-libtool clean-noinstPROGRAMS \
 	mostlyclean-am

 distclean: distclean-am
-	-rm -rf ./$(DEPDIR)
+		-rm -f ./$(DEPDIR)/direct_tcpip.Po
+	-rm -f ./$(DEPDIR)/scp.Po
+	-rm -f ./$(DEPDIR)/scp_nonblock.Po
+	-rm -f ./$(DEPDIR)/scp_write.Po
+	-rm -f ./$(DEPDIR)/scp_write_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp.Po
+	-rm -f ./$(DEPDIR)/sftp_RW_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_append.Po
+	-rm -f ./$(DEPDIR)/sftp_mkdir.Po
+	-rm -f ./$(DEPDIR)/sftp_mkdir_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_write.Po
+	-rm -f ./$(DEPDIR)/sftp_write_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_write_sliding.Po
+	-rm -f ./$(DEPDIR)/sftpdir.Po
+	-rm -f ./$(DEPDIR)/sftpdir_nonblock.Po
+	-rm -f ./$(DEPDIR)/ssh2.Po
+	-rm -f ./$(DEPDIR)/ssh2_agent.Po
+	-rm -f ./$(DEPDIR)/ssh2_agent_forwarding.Po
+	-rm -f ./$(DEPDIR)/ssh2_echo.Po
+	-rm -f ./$(DEPDIR)/ssh2_exec.Po
+	-rm -f ./$(DEPDIR)/subsystem_netconf.Po
+	-rm -f ./$(DEPDIR)/tcpip-forward.Po
+	-rm -f ./$(DEPDIR)/x11.Po
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
-	distclean-hdr distclean-tags
+	distclean-tags

 dvi: dvi-am

@@ -793,7 +858,30 @@ install-ps-am:
 installcheck-am:

 maintainer-clean: maintainer-clean-am
-	-rm -rf ./$(DEPDIR)
+		-rm -f ./$(DEPDIR)/direct_tcpip.Po
+	-rm -f ./$(DEPDIR)/scp.Po
+	-rm -f ./$(DEPDIR)/scp_nonblock.Po
+	-rm -f ./$(DEPDIR)/scp_write.Po
+	-rm -f ./$(DEPDIR)/scp_write_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp.Po
+	-rm -f ./$(DEPDIR)/sftp_RW_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_append.Po
+	-rm -f ./$(DEPDIR)/sftp_mkdir.Po
+	-rm -f ./$(DEPDIR)/sftp_mkdir_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_write.Po
+	-rm -f ./$(DEPDIR)/sftp_write_nonblock.Po
+	-rm -f ./$(DEPDIR)/sftp_write_sliding.Po
+	-rm -f ./$(DEPDIR)/sftpdir.Po
+	-rm -f ./$(DEPDIR)/sftpdir_nonblock.Po
+	-rm -f ./$(DEPDIR)/ssh2.Po
+	-rm -f ./$(DEPDIR)/ssh2_agent.Po
+	-rm -f ./$(DEPDIR)/ssh2_agent_forwarding.Po
+	-rm -f ./$(DEPDIR)/ssh2_echo.Po
+	-rm -f ./$(DEPDIR)/ssh2_exec.Po
+	-rm -f ./$(DEPDIR)/subsystem_netconf.Po
+	-rm -f ./$(DEPDIR)/tcpip-forward.Po
+	-rm -f ./$(DEPDIR)/x11.Po
 	-rm -f Makefile
 maintainer-clean-am: distclean-am maintainer-clean-generic

@@ -812,22 +900,24 @@ ps-am:

 uninstall-am:

-.MAKE: all install-am install-strip
+.MAKE: install-am install-strip

-.PHONY: CTAGS GTAGS TAGS all all-am check check-am clean clean-generic \
-	clean-libtool clean-noinstPROGRAMS cscopelist-am ctags \
-	ctags-am distclean distclean-compile distclean-generic \
-	distclean-hdr distclean-libtool distclean-tags distdir dvi \
-	dvi-am html html-am info info-am install install-am \
-	install-data install-data-am install-dvi install-dvi-am \
-	install-exec install-exec-am install-html install-html-am \
-	install-info install-info-am install-man install-pdf \
-	install-pdf-am install-ps install-ps-am install-strip \
-	installcheck installcheck-am installdirs maintainer-clean \
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-noinstPROGRAMS cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
 	maintainer-clean-generic mostlyclean mostlyclean-compile \
 	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
 	tags tags-am uninstall uninstall-am

+.PRECIOUS: Makefile
+

 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
--- a/example/direct_tcpip.c
+++ b/example/direct_tcpip.c
@@ -72,8 +72,8 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
@@ -82,49 +82,50 @@ int main(int argc, char *argv[])
    int listensock = -1, forwardsock = -1;
 #endif

-    if (argc > 1)
+    if(argc > 1)
        server_ip = argv[1];
-    if (argc > 2)
+    if(argc > 2)
        username = argv[2];
-    if (argc > 3)
+    if(argc > 3)
        password = argv[3];
-    if (argc > 4)
+    if(argc > 4)
        local_listenip = argv[4];
-    if (argc > 5)
+    if(argc > 5)
        local_listenport = atoi(argv[5]);
-    if (argc > 6)
+    if(argc > 6)
        remote_desthost = argv[6];
-    if (argc > 7)
+    if(argc > 7)
        remote_destport = atoi(argv[7]);

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    /* Connect to SSH server */
    sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 #ifdef WIN32
-    if (sock == INVALID_SOCKET) {
+    if(sock == INVALID_SOCKET) {
        fprintf(stderr, "failed to open socket!\n");
        return -1;
    }
 #else
-    if (sock == -1) {
+    if(sock == -1) {
        perror("socket");
        return -1;
    }
 #endif

    sin.sin_family = AF_INET;
-    if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(server_ip))) {
+    sin.sin_addr.s_addr = inet_addr(server_ip);
+    if(INADDR_NONE == sin.sin_addr.s_addr) {
        perror("inet_addr");
        return -1;
    }
    sin.sin_port = htons(22);
-    if (connect(sock, (struct sockaddr*)(&sin),
-                sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -159,44 +160,46 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "password"))
+    if(strstr(userauthlist, "password"))
        auth |= AUTH_PASSWORD;
-    if (strstr(userauthlist, "publickey"))
+    if(strstr(userauthlist, "publickey"))
        auth |= AUTH_PUBLICKEY;

    /* check for options */
    if(argc > 8) {
-        if ((auth & AUTH_PASSWORD) && !strcasecmp(argv[8], "-p"))
+        if((auth & AUTH_PASSWORD) && !strcasecmp(argv[8], "-p"))
            auth = AUTH_PASSWORD;
-        if ((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[8], "-k"))
+        if((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[8], "-k"))
            auth = AUTH_PUBLICKEY;
    }

-    if (auth & AUTH_PASSWORD) {
-        if (libssh2_userauth_password(session, username, password)) {
+    if(auth & AUTH_PASSWORD) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else if (auth & AUTH_PUBLICKEY) {
-        if (libssh2_userauth_publickey_fromfile(session, username, keyfile1,
-                                                keyfile2, password)) {
+    }
+    else if(auth & AUTH_PUBLICKEY) {
+        if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
+                                               keyfile2, password)) {
            fprintf(stderr, "\tAuthentication by public key failed!\n");
            goto shutdown;
        }
        fprintf(stderr, "\tAuthentication by public key succeeded.\n");
-    } else {
+    }
+    else {
        fprintf(stderr, "No supported authentication methods found!\n");
        goto shutdown;
    }

    listensock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 #ifdef WIN32
-    if (listensock == INVALID_SOCKET) {
+    if(listensock == INVALID_SOCKET) {
        fprintf(stderr, "failed to open listen socket!\n");
        return -1;
    }
 #else
-    if (listensock == -1) {
+    if(listensock == -1) {
        perror("socket");
        return -1;
    }
@@ -204,18 +207,20 @@ int main(int argc, char *argv[])

    sin.sin_family = AF_INET;
    sin.sin_port = htons(local_listenport);
-    if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(local_listenip))) {
+    sin.sin_addr.s_addr = inet_addr(local_listenip);
+    if(INADDR_NONE == sin.sin_addr.s_addr) {
        perror("inet_addr");
        goto shutdown;
    }
    sockopt = 1;
-    setsockopt(listensock, SOL_SOCKET, SO_REUSEADDR, &sockopt, sizeof(sockopt));
-    sinlen=sizeof(sin);
-    if (-1 == bind(listensock, (struct sockaddr *)&sin, sinlen)) {
+    setsockopt(listensock, SOL_SOCKET, SO_REUSEADDR, &sockopt,
+               sizeof(sockopt));
+    sinlen = sizeof(sin);
+    if(-1 == bind(listensock, (struct sockaddr *)&sin, sinlen)) {
        perror("bind");
        goto shutdown;
    }
-    if (-1 == listen(listensock, 2)) {
+    if(-1 == listen(listensock, 2)) {
        perror("listen");
        goto shutdown;
    }
@@ -225,12 +230,12 @@ int main(int argc, char *argv[])

    forwardsock = accept(listensock, (struct sockaddr *)&sin, &sinlen);
 #ifdef WIN32
-    if (forwardsock == INVALID_SOCKET) {
+    if(forwardsock == INVALID_SOCKET) {
        fprintf(stderr, "failed to accept forward socket!\n");
        goto shutdown;
    }
 #else
-    if (forwardsock == -1) {
+    if(forwardsock == -1) {
        perror("accept");
        goto shutdown;
    }
@@ -244,7 +249,7 @@ int main(int argc, char *argv[])

    channel = libssh2_channel_direct_tcpip_ex(session, remote_desthost,
        remote_destport, shost, sport);
-    if (!channel) {
+    if(!channel) {
        fprintf(stderr, "Could not open the direct-tcpip channel!\n"
                "(Note that this can be a problem at the server!"
                " Please review the server logs.)\n");
@@ -254,22 +259,23 @@ int main(int argc, char *argv[])
    /* Must use non-blocking IO hereafter due to the current libssh2 API */
    libssh2_session_set_blocking(session, 0);

-    while (1) {
+    while(1) {
        FD_ZERO(&fds);
        FD_SET(forwardsock, &fds);
        tv.tv_sec = 0;
        tv.tv_usec = 100000;
        rc = select(forwardsock + 1, &fds, NULL, NULL, &tv);
-        if (-1 == rc) {
+        if(-1 == rc) {
            perror("select");
            goto shutdown;
        }
-        if (rc && FD_ISSET(forwardsock, &fds)) {
+        if(rc && FD_ISSET(forwardsock, &fds)) {
            len = recv(forwardsock, buf, sizeof(buf), 0);
-            if (len < 0) {
+            if(len < 0) {
                perror("read");
                goto shutdown;
-            } else if (0 == len) {
+            }
+            else if(0 == len) {
                fprintf(stderr, "The client at %s:%d disconnected!\n", shost,
                    sport);
                goto shutdown;
@@ -277,34 +283,34 @@ int main(int argc, char *argv[])
            wr = 0;
            while(wr < len) {
                i = libssh2_channel_write(channel, buf + wr, len - wr);
-                if (LIBSSH2_ERROR_EAGAIN == i) {
+                if(LIBSSH2_ERROR_EAGAIN == i) {
                    continue;
                }
-                if (i < 0) {
+                if(i < 0) {
                    fprintf(stderr, "libssh2_channel_write: %d\n", i);
                    goto shutdown;
                }
                wr += i;
            }
        }
-        while (1) {
+        while(1) {
            len = libssh2_channel_read(channel, buf, sizeof(buf));
-            if (LIBSSH2_ERROR_EAGAIN == len)
+            if(LIBSSH2_ERROR_EAGAIN == len)
                break;
-            else if (len < 0) {
+            else if(len < 0) {
                fprintf(stderr, "libssh2_channel_read: %d", (int)len);
                goto shutdown;
            }
            wr = 0;
-            while (wr < len) {
+            while(wr < len) {
                i = send(forwardsock, buf + wr, len - wr, 0);
-                if (i <= 0) {
+                if(i <= 0) {
                    perror("write");
                    goto shutdown;
                }
                wr += i;
            }
-            if (libssh2_channel_eof(channel)) {
+            if(libssh2_channel_eof(channel)) {
                fprintf(stderr, "The server at %s:%d disconnected!\n",
                    remote_desthost, remote_destport);
                goto shutdown;
@@ -320,7 +326,7 @@ shutdown:
    close(forwardsock);
    close(listensock);
 #endif
-    if (channel)
+    if(channel)
        libssh2_channel_free(channel);
    libssh2_session_disconnect(session, "Client disconnecting normally");
    libssh2_session_free(session);
--- a/example/libssh2_config.h.in
+++ b/example/libssh2_config.h.in
@@ -21,6 +21,10 @@
 /* Define to 1 if you have the <arpa/inet.h> header file. */
 #undef HAVE_ARPA_INET_H

+/* Define to 1 if you have the declaration of `SecureZeroMemory', and to 0 if
+   you don't. */
+#undef HAVE_DECL_SECUREZEROMEMORY
+
 /* disabled non-blocking sockets */
 #undef HAVE_DISABLED_NONBLOCKING

@@ -60,6 +64,9 @@
 /* Define if you have the gcrypt library. */
 #undef HAVE_LIBGCRYPT

+/* Define if you have the mbedcrypto library. */
+#undef HAVE_LIBMBEDCRYPTO
+
 /* Define if you have the ssl library. */
 #undef HAVE_LIBSSL

@@ -72,6 +79,9 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H

+/* Define to 1 if you have the `memset_s' function. */
+#undef HAVE_MEMSET_S
+
 /* Define to 1 if you have the <netinet/in.h> header file. */
 #undef HAVE_NETINET_IN_H

@@ -168,14 +178,16 @@
 /* Enable "none" MAC -- NOT RECOMMENDED */
 #undef LIBSSH2_MAC_NONE

-/* Use OpenSSL */
+/* Use mbedtls */
+#undef LIBSSH2_MBEDTLS
+
+/* Use openssl */
 #undef LIBSSH2_OPENSSL

-/* Use Windows CNG */
+/* Use wincng */
 #undef LIBSSH2_WINCNG

-/* Define to the sub-directory in which libtool stores uninstalled libraries.
-   */
+/* Define to the sub-directory where libtool stores uninstalled libraries. */
 #undef LT_OBJDIR

 /* Define to 1 if _REENTRANT preprocessor symbol must be defined. */
--- a/example/libssh2_config_cmake.h.in
+++ b/example/libssh2_config_cmake.h.in
@@ -0,0 +1,72 @@
+/* Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+/* Headers */
+#cmakedefine HAVE_UNISTD_H
+#cmakedefine HAVE_INTTYPES_H
+#cmakedefine HAVE_STDLIB_H
+#cmakedefine HAVE_SYS_SELECT_H
+#cmakedefine HAVE_SYS_SOCKET_H
+#cmakedefine HAVE_SYS_TIME_H
+#cmakedefine HAVE_ARPA_INET_H
+#cmakedefine HAVE_NETINET_IN_H
+#cmakedefine HAVE_WINSOCK2_H
+
+/* Functions */
+#cmakedefine HAVE_STRCASECMP
+#cmakedefine HAVE__STRICMP
+#cmakedefine HAVE_SNPRINTF
+#cmakedefine HAVE__SNPRINTF
+
+/* Workaround for platforms without POSIX strcasecmp (e.g. Windows) */
+#ifndef HAVE_STRCASECMP
+# ifdef HAVE__STRICMP
+# define strcasecmp _stricmp
+# define HAVE_STRCASECMP
+# endif
+#endif
+
+/* Symbols */
+#cmakedefine HAVE___FUNC__
+#cmakedefine HAVE___FUNCTION__
+
+/* Workaround for platforms without C90 __func__ */
+#ifndef HAVE___FUNC__
+# ifdef HAVE___FUNCTION__
+# define __func__ __FUNCTION__
+# define HAVE___FUNC__
+# endif
+#endif
--- a/example/scp.c
+++ b/example/scp.c
@@ -38,42 +38,43 @@ int main(int argc, char *argv[])
    const char *fingerprint;
    LIBSSH2_SESSION *session;
    LIBSSH2_CHANNEL *channel;
-    const char *username="username";
-    const char *password="password";
-    const char *scppath="/tmp/TEST";
-    struct stat fileinfo;
+    const char *username = "username";
+    const char *password = "password";
+    const char *scppath = "/tmp/TEST";
+    libssh2_struct_stat fileinfo;
    int rc;
-    off_t got=0;
+    libssh2_struct_stat_size got = 0;

 #ifdef WIN32
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }
-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
-    if (argc > 4) {
+    if(argc > 4) {
        scppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -86,8 +87,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-            sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -119,27 +120,29 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username,
-                            "/home/username/.ssh/id_rsa.pub",
-                            "/home/username/.ssh/id_rsa",
-                            password)) {
+#define HOME_DIR "/home/username/"
+        if(libssh2_userauth_publickey_fromfile(session, username,
+                                               HOME_DIR ".ssh/id_rsa.pub",
+                                               HOME_DIR ".ssh/id_rsa",
+                                               password)) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
    }

    /* Request a file via SCP */
-    channel = libssh2_scp_recv(session, scppath, &fileinfo);
+    channel = libssh2_scp_recv2(session, scppath, &fileinfo);

-    if (!channel) {
+    if(!channel) {
        fprintf(stderr, "Unable to open a session: %d\n",
                libssh2_session_last_errno(session));
        goto shutdown;
@@ -148,10 +151,10 @@ int main(int argc, char *argv[])

    while(got < fileinfo.st_size) {
        char mem[1024];
-        int amount=sizeof(mem);
+        int amount = sizeof(mem);

        if((fileinfo.st_size -got) < amount) {
-            amount = fileinfo.st_size -got;
+            amount = (int)(fileinfo.st_size -got);
        }

        rc = libssh2_channel_read(channel, mem, amount);
@@ -170,7 +173,8 @@ int main(int argc, char *argv[])

 shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session,
+                               "Normal Shutdown, Thank you for playing");
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/scp_nonblock.c
+++ b/example/scp_nonblock.c
@@ -85,49 +85,50 @@ int main(int argc, char *argv[])
    const char *fingerprint;
    LIBSSH2_SESSION *session;
    LIBSSH2_CHANNEL *channel;
-    const char *username="username";
-    const char *password="password";
-    const char *scppath="/tmp/TEST";
-    struct stat fileinfo;
+    const char *username = "username";
+    const char *password = "password";
+    const char *scppath = "/tmp/TEST";
+    libssh2_struct_stat fileinfo;
 #ifdef HAVE_GETTIMEOFDAY
    struct timeval start;
    struct timeval end;
    long time_ms;
 #endif
    int rc;
-    int total = 0;
    int spin = 0;
-    off_t got=0;
+    libssh2_struct_stat_size got = 0;
+    libssh2_struct_stat_size total = 0;

 #ifdef WIN32
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }
-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
-    if (argc > 4) {
+    if(argc > 4) {
        scppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -140,14 +141,14 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in))) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }

    /* Create a session instance */
    session = libssh2_session_init();
-    if (!session)
+    if(!session)
        return -1;

    /* Since we have set non-blocking, tell libssh2 we are non-blocking */
@@ -160,9 +161,9 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */
-    while ((rc = libssh2_session_handshake(session, sock)) ==
-           LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+    while((rc = libssh2_session_handshake(session, sock)) ==
+          LIBSSH2_ERROR_EAGAIN);
+    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }
@@ -179,24 +180,25 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc = libssh2_userauth_password(session, username, password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc = libssh2_userauth_publickey_fromfile(session, username,
-                                                         "/home/username/"
-                                                         ".ssh/id_rsa.pub",
-                                                         "/home/username/"
-                                                         ".ssh/id_rsa",
-                                                         password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+        while((rc = libssh2_userauth_publickey_fromfile(session, username,
+                                                        "/home/username/"
+                                                        ".ssh/id_rsa.pub",
+                                                        "/home/username/"
+                                                        ".ssh/id_rsa",
+                                                        password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -207,11 +209,11 @@ int main(int argc, char *argv[])
 #endif

    /* Request a file via SCP */
-    fprintf(stderr, "libssh2_scp_recv()!\n");
+    fprintf(stderr, "libssh2_scp_recv2()!\n");
    do {
-        channel = libssh2_scp_recv(session, scppath, &fileinfo);
+        channel = libssh2_scp_recv2(session, scppath, &fileinfo);

-        if (!channel) {
+        if(!channel) {
            if(libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
                char *err_msg;

@@ -224,7 +226,7 @@ int main(int argc, char *argv[])
                waitsocket(sock, session);
            }
        }
-    } while (!channel);
+    } while(!channel);
    fprintf(stderr, "libssh2_scp_recv() is done, now receive data!\n");

    while(got < fileinfo.st_size) {
@@ -232,22 +234,22 @@ int main(int argc, char *argv[])
        int rc;

        do {
-            int amount=sizeof(mem);
+            int amount = sizeof(mem);

-            if ((fileinfo.st_size -got) < amount) {
-                amount = fileinfo.st_size - got;
+            if((fileinfo.st_size -got) < amount) {
+                amount = (int)(fileinfo.st_size - got);
            }

            /* loop until we block */
            rc = libssh2_channel_read(channel, mem, amount);
-            if (rc > 0) {
+            if(rc > 0) {
                write(1, mem, rc);
                got += rc;
                total += rc;
            }
-        } while (rc > 0);
+        } while(rc > 0);

-        if ((rc == LIBSSH2_ERROR_EAGAIN) && (got < fileinfo.st_size)) {
+        if((rc == LIBSSH2_ERROR_EAGAIN) && (got < fileinfo.st_size)) {
            /* this is due to blocking that would occur otherwise
            so we loop on this condition */

@@ -262,10 +264,11 @@ int main(int argc, char *argv[])
    gettimeofday(&end, NULL);

    time_ms = tvdiff(end, start);
-    fprintf(stderr, "Got %d bytes in %ld ms = %.1f bytes/sec spin: %d\n", total,
-           time_ms, total/(time_ms/1000.0), spin );
+    fprintf(stderr, "Got %ld bytes in %ld ms = %.1f bytes/sec spin: %d\n",
+            (long)total,
+            time_ms, total/(time_ms/1000.0), spin);
 #else
-    fprintf(stderr, "Got %d bytes spin: %d\n", total, spin);
+    fprintf(stderr, "Got %ld bytes spin: %d\n", (long)total, spin);
 #endif

    libssh2_channel_free(channel);
--- a/example/scp_write.c
+++ b/example/scp_write.c
@@ -38,10 +38,10 @@ int main(int argc, char *argv[])
    const char *fingerprint;
    LIBSSH2_SESSION *session = NULL;
    LIBSSH2_CHANNEL *channel;
-    const char *username="username";
-    const char *password="password";
-    const char *loclfile="scp_write.c";
-    const char *scppath="/tmp/TEST";
+    const char *username = "username";
+    const char *password = "password";
+    const char *loclfile = "scp_write.c";
+    const char *scppath = "/tmp/TEST";
    FILE *local;
    int rc;
    char mem[1024];
@@ -53,39 +53,40 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }
-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
    if(argc > 4) {
        loclfile = argv[4];
    }
-    if (argc > 5) {
+    if(argc > 5) {
        scppath = argv[5];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
-    if (!local) {
+    if(!local) {
        fprintf(stderr, "Can't open local file %s\n", loclfile);
        return -1;
    }
@@ -105,8 +106,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-            sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -138,18 +139,20 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username,
-                            "/home/username/.ssh/id_rsa.pub",
-                            "/home/username/.ssh/id_rsa",
-                            password)) {
+#define HOME "/home/username/"
+        if(libssh2_userauth_publickey_fromfile(session, username,
+                                               HOME ".ssh/id_rsa.pub",
+                                               HOME ".ssh/id_rsa",
+                                               password)) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -159,7 +162,7 @@ int main(int argc, char *argv[])
    channel = libssh2_scp_send(session, scppath, fileinfo.st_mode & 0777,
                               (unsigned long)fileinfo.st_size);

-    if (!channel) {
+    if(!channel) {
        char *errmsg;
        int errlen;
        int err = libssh2_session_last_error(session, &errmsg, &errlen, 0);
@@ -170,7 +173,7 @@ int main(int argc, char *argv[])
    fprintf(stderr, "SCP session waiting to send file\n");
    do {
        nread = fread(mem, 1, sizeof(mem), local);
-        if (nread <= 0) {
+        if(nread <= 0) {
            /* end of file */
            break;
        }
@@ -179,7 +182,7 @@ int main(int argc, char *argv[])
        do {
            /* write the same data over and over, until error or completion */
            rc = libssh2_channel_write(channel, ptr, nread);
-            if (rc < 0) {
+            if(rc < 0) {
                fprintf(stderr, "ERROR %d\n", rc);
                break;
            }
@@ -188,9 +191,9 @@ int main(int argc, char *argv[])
                ptr += rc;
                nread -= rc;
            }
-        } while (nread);
+        } while(nread);

-    } while (1);
+    } while(1);

    fprintf(stderr, "Sending EOF\n");
    libssh2_channel_send_eof(channel);
@@ -207,7 +210,7 @@ int main(int argc, char *argv[])
 shutdown:

    if(session) {
-        libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+        libssh2_session_disconnect(session, "Normal Shutdown");
        libssh2_session_free(session);
    }
 #ifdef WIN32
@@ -215,7 +218,7 @@ int main(int argc, char *argv[])
 #else
    close(sock);
 #endif
-    if (local)
+    if(local)
        fclose(local);
    fprintf(stderr, "all done\n");

--- a/example/scp_write_nonblock.c
+++ b/example/scp_write_nonblock.c
@@ -73,10 +73,10 @@ int main(int argc, char *argv[])
    const char *fingerprint;
    LIBSSH2_SESSION *session = NULL;
    LIBSSH2_CHANNEL *channel;
-    const char *username="username";
-    const char *password="password";
-    const char *loclfile="scp_write.c";
-    const char *scppath="/tmp/TEST";
+    const char *username = "username";
+    const char *password = "password";
+    const char *loclfile = "scp_write.c";
+    const char *scppath = "/tmp/TEST";
    FILE *local;
    int rc;
    char mem[1024*100];
@@ -92,39 +92,40 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }
-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
    if(argc > 4) {
        loclfile = argv[4];
    }
-    if (argc > 5) {
+    if(argc > 5) {
        scppath = argv[5];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
-    if (!local) {
+    if(!local) {
        fprintf(stderr, "Can't local file %s\n", loclfile);
        return -1;
    }
@@ -140,8 +141,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-            sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -158,8 +159,8 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */
-    while ((rc = libssh2_session_handshake(session, sock))
-           == LIBSSH2_ERROR_EAGAIN);
+    while((rc = libssh2_session_handshake(session, sock))
+          == LIBSSH2_ERROR_EAGAIN);
    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
@@ -177,21 +178,24 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc = libssh2_userauth_password(session, username, password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc = libssh2_userauth_publickey_fromfile(session, username,
-                                                         "/home/username/.ssh/id_rsa.pub",
-                                                         "/home/username/.ssh/id_rsa",
-                                                         password)) == LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+#define HOME "/home/username/"
+        while((rc = libssh2_userauth_publickey_fromfile(session, username,
+                                                        HOME ".ssh/id_rsa.pub",
+                                                        HOME ".ssh/id_rsa",
+                                                        password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -202,21 +206,21 @@ int main(int argc, char *argv[])
        channel = libssh2_scp_send(session, scppath, fileinfo.st_mode & 0777,
                                   (unsigned long)fileinfo.st_size);

-        if ((!channel) && (libssh2_session_last_errno(session) !=
-                           LIBSSH2_ERROR_EAGAIN)) {
+        if((!channel) && (libssh2_session_last_errno(session) !=
+                          LIBSSH2_ERROR_EAGAIN)) {
            char *err_msg;

            libssh2_session_last_error(session, &err_msg, NULL, 0);
            fprintf(stderr, "%s\n", err_msg);
            goto shutdown;
        }
-    } while (!channel);
+    } while(!channel);

    fprintf(stderr, "SCP session waiting to send file\n");
    start = time(NULL);
    do {
        nread = fread(mem, 1, sizeof(mem), local);
-        if (nread <= 0) {
+        if(nread <= 0) {
            /* end of file */
            break;
        }
@@ -226,12 +230,12 @@ int main(int argc, char *argv[])

        prev = 0;
        do {
-            while ((rc = libssh2_channel_write(channel, ptr, nread)) ==
-                   LIBSSH2_ERROR_EAGAIN) {
+            while((rc = libssh2_channel_write(channel, ptr, nread)) ==
+                  LIBSSH2_ERROR_EAGAIN) {
                waitsocket(sock, session);
                prev = 0;
            }
-            if (rc < 0) {
+            if(rc < 0) {
                fprintf(stderr, "ERROR %d total %ld / %d prev %d\n", rc,
                        total, (int)nread, (int)prev);
                break;
@@ -243,8 +247,8 @@ int main(int argc, char *argv[])
                nread -= rc;
                ptr += rc;
            }
-        } while (nread);
-    } while (!nread); /* only continue if nread was drained */
+        } while(nread);
+    } while(!nread); /* only continue if nread was drained */

    duration = (int)(time(NULL)-start);

@@ -252,22 +256,22 @@ int main(int argc, char *argv[])
           total, duration, total/(double)duration);

    fprintf(stderr, "Sending EOF\n");
-    while (libssh2_channel_send_eof(channel) == LIBSSH2_ERROR_EAGAIN);
+    while(libssh2_channel_send_eof(channel) == LIBSSH2_ERROR_EAGAIN);

    fprintf(stderr, "Waiting for EOF\n");
-    while (libssh2_channel_wait_eof(channel) == LIBSSH2_ERROR_EAGAIN);
+    while(libssh2_channel_wait_eof(channel) == LIBSSH2_ERROR_EAGAIN);

    fprintf(stderr, "Waiting for channel to close\n");
-    while (libssh2_channel_wait_closed(channel) == LIBSSH2_ERROR_EAGAIN);
+    while(libssh2_channel_wait_closed(channel) == LIBSSH2_ERROR_EAGAIN);

    libssh2_channel_free(channel);
    channel = NULL;

 shutdown:

-    while (libssh2_session_disconnect(session,
-                                      "Normal Shutdown, Thank you for playing") ==
-           LIBSSH2_ERROR_EAGAIN);
+    while(libssh2_session_disconnect(session,
+                                     "Normal Shutdown,") ==
+          LIBSSH2_ERROR_EAGAIN);
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/sftp.c
+++ b/example/sftp.c
@@ -37,18 +37,19 @@
 #include <ctype.h>


-const char *keyfile1="~/.ssh/id_rsa.pub";
-const char *keyfile2="~/.ssh/id_rsa";
-const char *username="username";
-const char *password="password";
-const char *sftppath="/tmp/TEST";
+const char *keyfile1 = "~/.ssh/id_rsa.pub";
+const char *keyfile2 = "~/.ssh/id_rsa";
+const char *username = "username";
+const char *password = "password";
+const char *sftppath = "/tmp/TEST";


-static void kbd_callback(const char *name, int name_len, 
-             const char *instruction, int instruction_len, int num_prompts,
-             const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
-             LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
-             void **abstract)
+static void kbd_callback(const char *name, int name_len,
+                         const char *instruction, int instruction_len,
+                         int num_prompts,
+                         const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
+                         LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
+                         void **abstract)
 {
    int i;
    size_t n;
@@ -67,7 +68,7 @@ static void kbd_callback(const char *name, int name_len,

    fprintf(stderr, "Number of prompts: %d\n\n", num_prompts);

-    for (i = 0; i < num_prompts; i++) {
+    for(i = 0; i < num_prompts; i++) {
        fprintf(stderr, "Prompt %d from server: '", i);
        fwrite(prompts[i].text, 1, prompts[i].length, stderr);
        fprintf(stderr, "'\n");
@@ -75,7 +76,7 @@ static void kbd_callback(const char *name, int name_len,
        fprintf(stderr, "Please type response: ");
        fgets(buf, sizeof(buf), stdin);
        n = strlen(buf);
-        while (n > 0 && strchr("\r\n", buf[n - 1]))
+        while(n > 0 && strchr("\r\n", buf[n - 1]))
          n--;
        buf[n] = 0;

@@ -108,16 +109,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -131,8 +133,8 @@ int main(int argc, char *argv[])
        sftppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
+    rc = libssh2_init(0);
+    if(rc != 0) {
        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }
@@ -146,8 +148,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-                sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -185,54 +187,61 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "password") != NULL) {
+    if(strstr(userauthlist, "password") != NULL) {
        auth_pw |= 1;
    }
-    if (strstr(userauthlist, "keyboard-interactive") != NULL) {
+    if(strstr(userauthlist, "keyboard-interactive") != NULL) {
        auth_pw |= 2;
    }
-    if (strstr(userauthlist, "publickey") != NULL) {
+    if(strstr(userauthlist, "publickey") != NULL) {
        auth_pw |= 4;
    }

-    /* if we got an 4. argument we set this option if supported */ 
+    /* if we got an 4. argument we set this option if supported */
    if(argc > 5) {
-        if ((auth_pw & 1) && !strcasecmp(argv[5], "-p")) {
+        if((auth_pw & 1) && !strcasecmp(argv[5], "-p")) {
            auth_pw = 1;
        }
-        if ((auth_pw & 2) && !strcasecmp(argv[5], "-i")) {
+        if((auth_pw & 2) && !strcasecmp(argv[5], "-i")) {
            auth_pw = 2;
        }
-        if ((auth_pw & 4) && !strcasecmp(argv[5], "-k")) {
+        if((auth_pw & 4) && !strcasecmp(argv[5], "-k")) {
            auth_pw = 4;
        }
    }

-    if (auth_pw & 1) {
+    if(auth_pw & 1) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else if (auth_pw & 2) {
+    }
+    else if(auth_pw & 2) {
        /* Or via keyboard-interactive */
-        if (libssh2_userauth_keyboard_interactive(session, username, &kbd_callback) ) {
+        if(libssh2_userauth_keyboard_interactive(session, username,
+                                                 &kbd_callback) ) {
            fprintf(stderr,
                "\tAuthentication by keyboard-interactive failed!\n");
            goto shutdown;
-        } else {
+        }
+        else {
            fprintf(stderr,
                "\tAuthentication by keyboard-interactive succeeded.\n");
        }
-    } else if (auth_pw & 4) {
+    }
+    else if(auth_pw & 4) {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username, keyfile1, keyfile2, password)) {
+        if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
+                                               keyfile2, password)) {
            fprintf(stderr, "\tAuthentication by public key failed!\n");
            goto shutdown;
-        } else {
+        }
+        else {
            fprintf(stderr, "\tAuthentication by public key succeeded.\n");
        }
-    } else {
+    }
+    else {
        fprintf(stderr, "No supported authentication methods found!\n");
        goto shutdown;
    }
@@ -240,7 +249,7 @@ int main(int argc, char *argv[])
    fprintf(stderr, "libssh2_sftp_init()!\n");
    sftp_session = libssh2_sftp_init(session);

-    if (!sftp_session) {
+    if(!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }
@@ -250,7 +259,7 @@ int main(int argc, char *argv[])
    sftp_handle =
        libssh2_sftp_open(sftp_session, sftppath, LIBSSH2_FXF_READ, 0);

-    if (!sftp_handle) {
+    if(!sftp_handle) {
        fprintf(stderr, "Unable to open file with SFTP: %ld\n",
                libssh2_sftp_last_error(sftp_session));
        goto shutdown;
@@ -262,19 +271,20 @@ int main(int argc, char *argv[])
        /* loop until we fail */
        fprintf(stderr, "libssh2_sftp_read()!\n");
        rc = libssh2_sftp_read(sftp_handle, mem, sizeof(mem));
-        if (rc > 0) {
+        if(rc > 0) {
            write(1, mem, rc);
-        } else {
+        }
+        else {
            break;
        }
-    } while (1);
+    } while(1);

    libssh2_sftp_close(sftp_handle);
    libssh2_sftp_shutdown(sftp_session);

  shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session, "Normal Shutdown");
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/sftp_RW_nonblock.c
+++ b/example/sftp_RW_nonblock.c
@@ -79,10 +79,10 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *sftppath="/tmp/TEST"; /* source path */
-    const char *dest="/tmp/TEST2";    /* destination path */
+    const char *username = "username";
+    const char *password = "password";
+    const char *sftppath = "/tmp/TEST"; /* source path */
+    const char *dest = "/tmp/TEST2";    /* destination path */
    int rc;
    LIBSSH2_SFTP *sftp_session;
    LIBSSH2_SFTP_HANDLE *sftp_handle;
@@ -90,21 +90,22 @@ int main(int argc, char *argv[])
    char mem[1000];
    struct timeval timeout;
    fd_set fd;
+    fd_set fd2;

 #ifdef WIN32
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -117,7 +118,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = htonl(0x7F000001);
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -171,25 +172,26 @@ int main(int argc, char *argv[])
        goto shutdown;
    }

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password))
+        while((rc = libssh2_userauth_password(session, username, password))
               == LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc =
-                libssh2_userauth_publickey_fromfile(session, username,
-                                                    "/home/username/"
-                                                    ".ssh/id_rsa.pub",
-                                                    "/home/username/"
-                                                    ".ssh/id_rsa",
-                                                    password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc =
+               libssh2_userauth_publickey_fromfile(session, username,
+                                                   "/home/username/"
+                                                   ".ssh/id_rsa.pub",
+                                                   "/home/username/"
+                                                   ".ssh/id_rsa",
+                                                   password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -209,15 +211,15 @@ int main(int argc, char *argv[])
                goto shutdown;
            }
        }
-    } while (!sftp_session);
+    } while(!sftp_session);

    /* Request a file via SFTP */
    do {
        sftp_handle = libssh2_sftp_open(sftp_session, sftppath,
                                        LIBSSH2_FXF_READ, 0);

-        if (!sftp_handle) {
-            if (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
+        if(!sftp_handle) {
+            if(libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
                fprintf(stderr, "Unable to open file with SFTP\n");
                goto shutdown;
            }
@@ -226,7 +228,7 @@ int main(int argc, char *argv[])
                waitsocket(sock, session); /* now we wait */
            }
        }
-    } while (!sftp_handle);
+    } while(!sftp_handle);

    fprintf(stderr, "libssh2_sftp_open() is done, now receive data!\n");
    do {
@@ -242,7 +244,7 @@ int main(int argc, char *argv[])
                /* write to temporary storage area */
                fwrite(mem, rc, 1, tempstorage);
            }
-        } while (rc > 0);
+        } while(rc > 0);

        if(rc != LIBSSH2_ERROR_EAGAIN) {
            /* error or end of file */
@@ -253,11 +255,12 @@ int main(int argc, char *argv[])
        timeout.tv_usec = 0;

        FD_ZERO(&fd);
-
+        FD_ZERO(&fd2);
        FD_SET(sock, &fd);
+        FD_SET(sock, &fd2);

        /* wait for readable or writeable */
-        rc = select(sock+1, &fd, &fd, NULL, &timeout);
+        rc = select(sock + 1, &fd, &fd2, NULL, &timeout);
        if(rc <= 0) {
            /* negative is error
               0 is timeout */
@@ -265,7 +268,7 @@ int main(int argc, char *argv[])
            break;
        }

-    } while (1);
+    } while(1);

    libssh2_sftp_close(sftp_handle);
    fclose(tempstorage);
@@ -301,7 +304,7 @@ int main(int argc, char *argv[])
                                        nread);
                ptr += rc;
                nread -= nread;
-            } while (rc >= 0);
+            } while(rc >= 0);

            if(rc != LIBSSH2_ERROR_EAGAIN) {
                /* error or end of file */
@@ -312,11 +315,12 @@ int main(int argc, char *argv[])
            timeout.tv_usec = 0;

            FD_ZERO(&fd);
-
+            FD_ZERO(&fd2);
            FD_SET(sock, &fd);
+            FD_SET(sock, &fd2);

            /* wait for readable or writeable */
-            rc = select(sock+1, &fd, &fd, NULL, &timeout);
+            rc = select(sock + 1, &fd, &fd2, NULL, &timeout);
            if(rc <= 0) {
                /* negative is error
                   0 is timeout */
@@ -324,7 +328,7 @@ int main(int argc, char *argv[])
                        rc);
                break;
            }
-        } while (1);
+        } while(1);
        fprintf(stderr, "SFTP upload done!\n");
    }
    else {
@@ -336,7 +340,7 @@ int main(int argc, char *argv[])

  shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session, "Normal Shutdown");
    libssh2_session_free(session);

 #ifdef WIN32
@@ -344,7 +348,7 @@ int main(int argc, char *argv[])
 #else
    close(sock);
 #endif
-    if (tempstorage)
+    if(tempstorage)
        fclose(tempstorage);
    fprintf(stderr, "all done\n");

--- a/example/sftp_append.c
+++ b/example/sftp_append.c
@@ -40,10 +40,10 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *loclfile="sftp_write.c";
-    const char *sftppath="/tmp/TEST";
+    const char *username = "username";
+    const char *password = "password";
+    const char *loclfile = "sftp_write.c";
+    const char *sftppath = "/tmp/TEST";
    int rc;
    FILE *local;
    LIBSSH2_SFTP *sftp_session;
@@ -57,16 +57,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -83,14 +84,14 @@ int main(int argc, char *argv[])
        sftppath = argv[5];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
-    if (!local) {
+    if(!local) {
        fprintf(stderr, "Can't open local file %s\n", loclfile);
        return -1;
    }
@@ -104,8 +105,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-            sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -140,18 +141,20 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username,
-                            "/home/username/.ssh/id_rsa.pub",
-                            "/home/username/.ssh/id_rsa",
-                            password)) {
+#define HOME "/home/username/"
+        if(libssh2_userauth_publickey_fromfile(session, username,
+                                               HOME ".ssh/id_rsa.pub",
+                                               HOME ".ssh/id_rsa",
+                                               password)) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -160,7 +163,7 @@ int main(int argc, char *argv[])
    fprintf(stderr, "libssh2_sftp_init()!\n");
    sftp_session = libssh2_sftp_init(session);

-    if (!sftp_session) {
+    if(!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }
@@ -173,7 +176,7 @@ int main(int argc, char *argv[])
                          LIBSSH2_FXF_WRITE|LIBSSH2_FXF_READ,
                          LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
                          LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);
-    if (!sftp_handle) {
+    if(!sftp_handle) {
        fprintf(stderr, "Unable to open file with SFTP\n");
        goto shutdown;
    }
@@ -188,14 +191,14 @@ int main(int argc, char *argv[])

    fprintf(stderr, "libssh2_sftp_open() a handle for APPEND\n");

-    if (!sftp_handle) {
+    if(!sftp_handle) {
        fprintf(stderr, "Unable to open file with SFTP\n");
        goto shutdown;
    }
    fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n");
    do {
        nread = fread(mem, 1, sizeof(mem), local);
-        if (nread <= 0) {
+        if(nread <= 0) {
            /* end of file */
            break;
        }
@@ -208,9 +211,9 @@ int main(int argc, char *argv[])
                break;
            ptr += rc;
            nread -= rc;
-        } while (nread);
+        } while(nread);

-    } while (rc > 0);
+    } while(rc > 0);

    libssh2_sftp_close(sftp_handle);
    libssh2_sftp_shutdown(sftp_session);
@@ -225,7 +228,7 @@ shutdown:
 #else
    close(sock);
 #endif
-    if (local)
+    if(local)
        fclose(local);
    fprintf(stderr, "all done\n");

--- a/example/sftp_mkdir.c
+++ b/example/sftp_mkdir.c
@@ -40,9 +40,9 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *sftppath="/tmp/sftp_mkdir";
+    const char *username = "username";
+    const char *password = "password";
+    const char *sftppath = "/tmp/sftp_mkdir";
    int rc;
    LIBSSH2_SFTP *sftp_session;

@@ -50,16 +50,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -73,9 +74,9 @@ int main(int argc, char *argv[])
        sftppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -88,7 +89,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
            sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -121,15 +122,16 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username,
+        if(libssh2_userauth_publickey_fromfile(session, username,
                            "/home/username/.ssh/id_rsa.pub",
                            "/home/username/.ssh/id_rsa",
                            password)) {
@@ -140,7 +142,7 @@ int main(int argc, char *argv[])

    sftp_session = libssh2_sftp_init(session);

-    if (!sftp_session) {
+    if(!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }
@@ -161,7 +163,7 @@ int main(int argc, char *argv[])

 shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session, "Normal Shutdown");
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/sftp_mkdir_nonblock.c
+++ b/example/sftp_mkdir_nonblock.c
@@ -40,9 +40,9 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *sftppath="/tmp/sftp_mkdir_nonblock";
+    const char *username = "username";
+    const char *password = "password";
+    const char *sftppath = "/tmp/sftp_mkdir_nonblock";
    int rc;
    LIBSSH2_SFTP *sftp_session;

@@ -50,16 +50,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -73,9 +74,9 @@ int main(int argc, char *argv[])
        sftppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -88,7 +89,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
            sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -121,15 +122,16 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username,
+        if(libssh2_userauth_publickey_fromfile(session, username,
                            "/home/username/.ssh/id_rsa.pub",
                            "/home/username/.ssh/id_rsa",
                            password)) {
@@ -141,7 +143,7 @@ int main(int argc, char *argv[])
    fprintf(stderr, "libssh2_sftp_init()!\n");
    sftp_session = libssh2_sftp_init(session);

-    if (!sftp_session) {
+    if(!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }
@@ -151,7 +153,7 @@ int main(int argc, char *argv[])

    fprintf(stderr, "libssh2_sftp_mkdirnb()!\n");
    /* Make a directory via SFTP */
-    while (libssh2_sftp_mkdir(sftp_session, sftppath,
+    while(libssh2_sftp_mkdir(sftp_session, sftppath,
                              LIBSSH2_SFTP_S_IRWXU|
                              LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IXGRP|
                              LIBSSH2_SFTP_S_IROTH|LIBSSH2_SFTP_S_IXOTH)
@@ -161,7 +163,7 @@ int main(int argc, char *argv[])

 shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session, "Normal Shutdown");
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/sftp_nonblock.c
+++ b/example/sftp_nonblock.c
@@ -85,9 +85,9 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *sftppath="/tmp/TEST";
+    const char *username = "username";
+    const char *password = "password";
+    const char *sftppath = "/tmp/TEST";
 #ifdef HAVE_GETTIMEOFDAY
    struct timeval start;
    struct timeval end;
@@ -103,32 +103,33 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
-    if (argc > 4) {
+    if(argc > 4) {
        sftppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -141,7 +142,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -149,7 +150,7 @@ int main(int argc, char *argv[])

    /* Create a session instance */
    session = libssh2_session_init();
-    if (!session)
+    if(!session)
        return -1;

    /* Since we have set non-blocking, tell libssh2 we are non-blocking */
@@ -162,9 +163,9 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
        * and setup crypto, compression, and MAC layers
        */
-    while ((rc = libssh2_session_handshake(session, sock)) ==
+    while((rc = libssh2_session_handshake(session, sock)) ==
           LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }
@@ -181,25 +182,26 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password))
+        while((rc = libssh2_userauth_password(session, username, password))
               == LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc =
-                libssh2_userauth_publickey_fromfile(session, username,
-                                                    "/home/username/"
-                                                    ".ssh/id_rsa.pub",
-                                                    "/home/username/"
-                                                    ".ssh/id_rsa",
-                                                    password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc =
+               libssh2_userauth_publickey_fromfile(session, username,
+                                                   "/home/username/"
+                                                   ".ssh/id_rsa.pub",
+                                                   "/home/username/"
+                                                   ".ssh/id_rsa",
+                                                   password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -222,7 +224,7 @@ int main(int argc, char *argv[])
                goto shutdown;
            }
        }
-    } while (!sftp_session);
+    } while(!sftp_session);

    fprintf(stderr, "libssh2_sftp_open()!\n");
    /* Request a file via SFTP */
@@ -230,8 +232,8 @@ int main(int argc, char *argv[])
        sftp_handle = libssh2_sftp_open(sftp_session, sftppath,
                                        LIBSSH2_FXF_READ, 0);

-        if (!sftp_handle) {
-            if (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
+        if(!sftp_handle) {
+            if(libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
                fprintf(stderr, "Unable to open file with SFTP\n");
                goto shutdown;
            }
@@ -240,31 +242,33 @@ int main(int argc, char *argv[])
                waitsocket(sock, session); /* now we wait */
            }
        }
-    } while (!sftp_handle);
+    } while(!sftp_handle);

    fprintf(stderr, "libssh2_sftp_open() is done, now receive data!\n");
    do {
        char mem[1024*24];

        /* loop until we fail */
-        while ((rc = libssh2_sftp_read(sftp_handle, mem,
+        while((rc = libssh2_sftp_read(sftp_handle, mem,
                                       sizeof(mem))) == LIBSSH2_ERROR_EAGAIN) {
            spin++;
            waitsocket(sock, session); /* now we wait */
        }
-        if (rc > 0) {
+        if(rc > 0) {
            total += rc;
            write(1, mem, rc);
-        } else {
+        }
+        else {
            break;
        }
-    } while (1);
+    } while(1);

 #ifdef HAVE_GETTIMEOFDAY
    gettimeofday(&end, NULL);
    time_ms = tvdiff(end, start);
-    fprintf(stderr, "Got %d bytes in %ld ms = %.1f bytes/sec spin: %d\n", total,
-           time_ms, total/(time_ms/1000.0), spin );
+    fprintf(stderr, "Got %d bytes in %ld ms = %.1f bytes/sec spin: %d\n",
+            total,
+            time_ms, total/(time_ms/1000.0), spin);
 #else
    fprintf(stderr, "Got %d bytes spin: %d\n", total, spin);
 #endif
@@ -275,7 +279,7 @@ int main(int argc, char *argv[])
 shutdown:

    fprintf(stderr, "libssh2_session_disconnect\n");
-    while (libssh2_session_disconnect(session,
+    while(libssh2_session_disconnect(session,
                                      "Normal Shutdown, Thank you") ==
           LIBSSH2_ERROR_EAGAIN);
    libssh2_session_free(session);
--- a/example/sftp_write.c
+++ b/example/sftp_write.c
@@ -40,10 +40,10 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *loclfile="sftp_write.c";
-    const char *sftppath="/tmp/TEST";
+    const char *username = "username";
+    const char *password = "password";
+    const char *loclfile = "sftp_write.c";
+    const char *sftppath = "/tmp/TEST";
    int rc;
    FILE *local;
    LIBSSH2_SFTP *sftp_session;
@@ -56,16 +56,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -82,14 +83,14 @@ int main(int argc, char *argv[])
        sftppath = argv[5];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
-    if (!local) {
+    if(!local) {
        fprintf(stderr, "Can't open local file %s\n", loclfile);
        return -1;
    }
@@ -103,7 +104,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
            sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -139,18 +140,20 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username,
-                            "/home/username/.ssh/id_rsa.pub",
-                            "/home/username/.ssh/id_rsa",
-                            password)) {
+        const char *pubkey = "/home/username/.ssh/id_rsa.pub";
+        const char *privkey = "/home/username/.ssh/id_rsa.pub";
+        if(libssh2_userauth_publickey_fromfile(session, username,
+                                               pubkey, privkey,
+                                               password)) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -159,7 +162,7 @@ int main(int argc, char *argv[])
    fprintf(stderr, "libssh2_sftp_init()!\n");
    sftp_session = libssh2_sftp_init(session);

-    if (!sftp_session) {
+    if(!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }
@@ -172,14 +175,14 @@ int main(int argc, char *argv[])
                      LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
                      LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);

-    if (!sftp_handle) {
+    if(!sftp_handle) {
        fprintf(stderr, "Unable to open file with SFTP\n");
        goto shutdown;
    }
    fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n");
    do {
        nread = fread(mem, 1, sizeof(mem), local);
-        if (nread <= 0) {
+        if(nread <= 0) {
            /* end of file */
            break;
        }
@@ -192,9 +195,9 @@ int main(int argc, char *argv[])
                break;
            ptr += rc;
            nread -= rc;
-        } while (nread);
+        } while(nread);

-    } while (rc > 0);
+    } while(rc > 0);

    libssh2_sftp_close(sftp_handle);
    libssh2_sftp_shutdown(sftp_session);
@@ -209,7 +212,7 @@ shutdown:
 #else
    close(sock);
 #endif
-    if (local)
+    if(local)
        fclose(local);
    fprintf(stderr, "all done\n");

--- a/example/sftp_write_nonblock.c
+++ b/example/sftp_write_nonblock.c
@@ -4,7 +4,7 @@
 * The sample code has default values for host name, user name, password
 * and path to copy, but you can specify them on the command line like:
 *
- * "sftp 192.168.0.1 user password sftp_write_nonblock.c /tmp/sftp_write_nonblock.c"
+ * "sftp 192.168.0.1 user password thisfile /tmp/storehere"
 */

 #include "libssh2_config.h"
@@ -77,10 +77,10 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *loclfile="sftp_write_nonblock.c";
-    const char *sftppath="/tmp/sftp_write_nonblock.c";
+    const char *username = "username";
+    const char *password = "password";
+    const char *loclfile = "sftp_write_nonblock.c";
+    const char *sftppath = "/tmp/sftp_write_nonblock.c";
    int rc;
    FILE *local;
    LIBSSH2_SFTP *sftp_session;
@@ -96,40 +96,41 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
-    if (argc > 4) {
+    if(argc > 4) {
        loclfile = argv[4];
    }
-    if (argc > 5) {
+    if(argc > 5) {
        sftppath = argv[5];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
-    if (!local) {
+    if(!local) {
        fprintf(stderr, "Can't open local file %s\n", loclfile);
        return -1;
    }
@@ -143,7 +144,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -152,7 +153,7 @@ int main(int argc, char *argv[])
    /* Create a session instance
        */
    session = libssh2_session_init();
-    if (!session)
+    if(!session)
        return -1;

    /* Since we have set non-blocking, tell libssh2 we are non-blocking */
@@ -161,9 +162,9 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
        * and setup crypto, compression, and MAC layers
        */
-    while ((rc = libssh2_session_handshake(session, sock))
+    while((rc = libssh2_session_handshake(session, sock))
           == LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }
@@ -180,22 +181,24 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
+        while((rc = libssh2_userauth_password(session, username, password)) ==
               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc = libssh2_userauth_publickey_fromfile(session, username,
-                                                         "/home/username/.ssh/id_rsa.pub",
-                                                         "/home/username/.ssh/id_rsa",
-                                                         password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+        const char *pubkey = "/home/username/.ssh/id_rsa.pub";
+        const char *privkey = "/home/username/.ssh/id_rsa";
+        while((rc = libssh2_userauth_publickey_fromfile(session, username,
+                                                        pubkey, privkey,
+                                                        password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -205,28 +208,28 @@ int main(int argc, char *argv[])
    do {
        sftp_session = libssh2_sftp_init(session);

-        if (!sftp_session &&
+        if(!sftp_session &&
            (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
            fprintf(stderr, "Unable to init SFTP session\n");
            goto shutdown;
        }
-    } while (!sftp_session);
+    } while(!sftp_session);

    fprintf(stderr, "libssh2_sftp_open()!\n");
    /* Request a file via SFTP */
    do {
        sftp_handle =
-        libssh2_sftp_open(sftp_session, sftppath,
-                          LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,
-                          LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
-                          LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);
-
-        if (!sftp_handle &&
-            (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
+            libssh2_sftp_open(sftp_session, sftppath,
+                              LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|
+                              LIBSSH2_FXF_TRUNC,
+                              LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
+                              LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);
+        if(!sftp_handle &&
+           (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
            fprintf(stderr, "Unable to open file with SFTP\n");
            goto shutdown;
        }
-    } while (!sftp_handle);
+    } while(!sftp_handle);

    fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n");

@@ -234,7 +237,7 @@ int main(int argc, char *argv[])

    do {
        nread = fread(mem, 1, sizeof(mem), local);
-        if (nread <= 0) {
+        if(nread <= 0) {
            /* end of file */
            break;
        }
@@ -244,7 +247,7 @@ int main(int argc, char *argv[])

        do {
            /* write data in a loop until we block */
-            while ((rc = libssh2_sftp_write(sftp_handle, ptr, nread)) ==
+            while((rc = libssh2_sftp_write(sftp_handle, ptr, nread)) ==
                   LIBSSH2_ERROR_EAGAIN) {
                waitsocket(sock, session);
            }
@@ -253,8 +256,8 @@ int main(int argc, char *argv[])
            ptr += rc;
            nread -= rc;

-        } while (nread);
-    } while (rc > 0);
+        } while(nread);
+    } while(rc > 0);

    duration = (int)(time(NULL)-start);

@@ -268,7 +271,7 @@ int main(int argc, char *argv[])

 shutdown:

-    while (libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing")
+    while(libssh2_session_disconnect(session, "Normal Shutdown")
           == LIBSSH2_ERROR_EAGAIN);
    libssh2_session_free(session);

--- a/example/sftp_write_sliding.c
+++ b/example/sftp_write_sliding.c
@@ -4,7 +4,7 @@
 * The sample code has default values for host name, user name, password
 * and path to copy, but you can specify them on the command line like:
 *
- * "sftp 192.168.0.1 user password sftp_write_nonblock.c /tmp/sftp_write_nonblock.c"
+ * "sftp 192.168.0.1 user password file /tmp/storehere"
 */

 #include "libssh2_config.h"
@@ -77,10 +77,10 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *loclfile="sftp_write_nonblock.c";
-    const char *sftppath="/tmp/sftp_write_nonblock.c";
+    const char *username = "username";
+    const char *password = "password";
+    const char *loclfile = "sftp_write_nonblock.c";
+    const char *sftppath = "/tmp/sftp_write_nonblock.c";
    int rc;
    FILE *local;
    LIBSSH2_SFTP *sftp_session;
@@ -96,40 +96,41 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
-    if (argc > 4) {
+    if(argc > 4) {
        loclfile = argv[4];
    }
-    if (argc > 5) {
+    if(argc > 5) {
        sftppath = argv[5];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    local = fopen(loclfile, "rb");
-    if (!local) {
+    if(!local) {
        fprintf(stderr, "Can't open local file %s\n", loclfile);
        return -1;
    }
@@ -143,7 +144,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -152,7 +153,7 @@ int main(int argc, char *argv[])
    /* Create a session instance
        */
    session = libssh2_session_init();
-    if (!session)
+    if(!session)
        return -1;

    /* Since we have set non-blocking, tell libssh2 we are non-blocking */
@@ -161,9 +162,9 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
        * and setup crypto, compression, and MAC layers
        */
-    while ((rc = libssh2_session_handshake(session, sock))
+    while((rc = libssh2_session_handshake(session, sock))
           == LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }
@@ -180,22 +181,24 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
+        while((rc = libssh2_userauth_password(session, username, password)) ==
               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc = libssh2_userauth_publickey_fromfile(session, username,
-                                                         "/home/username/.ssh/id_rsa.pub",
-                                                         "/home/username/.ssh/id_rsa",
-                                                         password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+#define PUBKEY "/home/username/.ssh/id_rsa.pub"
+#define PRIVKEY "/home/username/.ssh/id_rsa"
+        while((rc = libssh2_userauth_publickey_fromfile(session, username,
+                                                        PUBKEY, PRIVKEY,
+                                                        password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -205,28 +208,29 @@ int main(int argc, char *argv[])
    do {
        sftp_session = libssh2_sftp_init(session);

-        if (!sftp_session &&
+        if(!sftp_session &&
            (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
            fprintf(stderr, "Unable to init SFTP session\n");
            goto shutdown;
        }
-    } while (!sftp_session);
+    } while(!sftp_session);

    fprintf(stderr, "libssh2_sftp_open()!\n");
    /* Request a file via SFTP */
    do {
        sftp_handle =
-        libssh2_sftp_open(sftp_session, sftppath,
-                          LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,
-                          LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
-                          LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);
+            libssh2_sftp_open(sftp_session, sftppath,
+                              LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|
+                              LIBSSH2_FXF_TRUNC,
+                              LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
+                              LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);

-        if (!sftp_handle &&
-            (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
+        if(!sftp_handle &&
+           (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
            fprintf(stderr, "Unable to open file with SFTP\n");
            goto shutdown;
        }
-    } while (!sftp_handle);
+    } while(!sftp_handle);

    fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n");

@@ -235,9 +239,9 @@ int main(int argc, char *argv[])
    memuse = 0; /* it starts blank */
    do {
        nread = fread(&mem[memuse], 1, sizeof(mem)-memuse, local);
-        if (nread <= 0) {
+        if(nread <= 0) {
            /* end of file */
-            if (memuse > 0)
+            if(memuse > 0)
                /* the previous sending is not finished */
                nread = 0;
            else
@@ -247,7 +251,7 @@ int main(int argc, char *argv[])
        total += nread;

        /* write data in a loop until we block */
-        while ((rc = libssh2_sftp_write(sftp_handle, mem, memuse)) ==
+        while((rc = libssh2_sftp_write(sftp_handle, mem, memuse)) ==
               LIBSSH2_ERROR_EAGAIN) {
            waitsocket(sock, session);
        }
@@ -263,7 +267,7 @@ int main(int argc, char *argv[])
            /* 'mem' was consumed fully */
            memuse = 0;

-    } while (rc > 0);
+    } while(rc > 0);

    duration = (int)(time(NULL)-start);

@@ -277,8 +281,8 @@ int main(int argc, char *argv[])

 shutdown:

-    while (libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing")
-           == LIBSSH2_ERROR_EAGAIN);
+    while(libssh2_session_disconnect(session, "Normal Shutdown")
+          == LIBSSH2_ERROR_EAGAIN);
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/sftpdir.c
+++ b/example/sftpdir.c
@@ -36,26 +36,16 @@
 #include <stdio.h>
 #include <ctype.h>

-/* last resort for systems not defining PRIu64 in inttypes.h */
-#ifndef __PRI64_PREFIX
 #ifdef WIN32
-#define __PRI64_PREFIX "I64"
+#define __FILESIZE "I64"
 #else
-#if __WORDSIZE == 64
-#define __PRI64_PREFIX "l"
-#else
-#define __PRI64_PREFIX "ll"
-#endif /* __WORDSIZE */
-#endif /* WIN32 */
-#endif /* !__PRI64_PREFIX */
-#ifndef PRIu64
-#define PRIu64 __PRI64_PREFIX "u"
-#endif  /* PRIu64 */
+#define __FILESIZE "llu"
+#endif

-const char *keyfile1="~/.ssh/id_rsa.pub";
-const char *keyfile2="~/.ssh/id_rsa";
-const char *username="username";
-const char *password="password";
+const char *keyfile1 = "~/.ssh/id_rsa.pub";
+const char *keyfile2 = "~/.ssh/id_rsa";
+const char *username = "username";
+const char *password = "password";

 static void kbd_callback(const char *name, int name_len,
                         const char *instruction, int instruction_len,
@@ -68,7 +58,7 @@ static void kbd_callback(const char *name, int name_len,
    (void)name_len;
    (void)instruction;
    (void)instruction_len;
-    if (num_prompts == 1) {
+    if(num_prompts == 1) {
        responses[0].text = strdup(password);
        responses[0].length = strlen(password);
    }
@@ -84,7 +74,7 @@ int main(int argc, char *argv[])
    const char *fingerprint;
    char *userauthlist;
    LIBSSH2_SESSION *session;
-    const char *sftppath="/tmp/secretdir";
+    const char *sftppath = "/tmp/secretdir";
    LIBSSH2_SFTP *sftp_session;
    LIBSSH2_SFTP_HANDLE *sftp_handle;

@@ -92,16 +82,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -115,9 +106,9 @@ int main(int argc, char *argv[])
        sftppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -130,8 +121,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-            sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -166,58 +157,64 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "password") != NULL) {
+    if(strstr(userauthlist, "password") != NULL) {
        auth_pw |= 1;
    }
-    if (strstr(userauthlist, "keyboard-interactive") != NULL) {
+    if(strstr(userauthlist, "keyboard-interactive") != NULL) {
        auth_pw |= 2;
    }
-    if (strstr(userauthlist, "publickey") != NULL) {
+    if(strstr(userauthlist, "publickey") != NULL) {
        auth_pw |= 4;
    }

    /* if we got an 5. argument we set this option if supported */
    if(argc > 5) {
-        if ((auth_pw & 1) && !strcasecmp(argv[5], "-p")) {
+        if((auth_pw & 1) && !strcasecmp(argv[5], "-p")) {
            auth_pw = 1;
        }
-        if ((auth_pw & 2) && !strcasecmp(argv[5], "-i")) {
+        if((auth_pw & 2) && !strcasecmp(argv[5], "-i")) {
            auth_pw = 2;
        }
-        if ((auth_pw & 4) && !strcasecmp(argv[5], "-k")) {
+        if((auth_pw & 4) && !strcasecmp(argv[5], "-k")) {
            auth_pw = 4;
        }
    }

-    if (auth_pw & 1) {
+    if(auth_pw & 1) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "\tAuthentication by password failed!\n");
            goto shutdown;
-        } else {
+        }
+        else {
            fprintf(stderr, "\tAuthentication by password succeeded.\n");
        }
-    } else if (auth_pw & 2) {
+    }
+    else if(auth_pw & 2) {
        /* Or via keyboard-interactive */
-        if (libssh2_userauth_keyboard_interactive(session, username,
-                                                  &kbd_callback) ) {
+        if(libssh2_userauth_keyboard_interactive(session, username,
+                                                 &kbd_callback) ) {
            fprintf(stderr,
-                "\tAuthentication by keyboard-interactive failed!\n");
+                    "\tAuthentication by keyboard-interactive failed!\n");
            goto shutdown;
-        } else {
-            fprintf(stderr,
-                "\tAuthentication by keyboard-interactive succeeded.\n");
        }
-    } else if (auth_pw & 4) {
+        else {
+            fprintf(stderr,
+                    "\tAuthentication by keyboard-interactive succeeded.\n");
+        }
+    }
+    else if(auth_pw & 4) {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username, keyfile1,
-                                                keyfile2, password)) {
+        if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
+                                               keyfile2, password)) {
            fprintf(stderr, "\tAuthentication by public key failed!\n");
            goto shutdown;
-        } else {
+        }
+        else {
            fprintf(stderr, "\tAuthentication by public key succeeded.\n");
        }
-    } else {
+    }
+    else {
        fprintf(stderr, "No supported authentication methods found!\n");
        goto shutdown;
    }
@@ -225,7 +222,7 @@ int main(int argc, char *argv[])
    fprintf(stderr, "libssh2_sftp_init()!\n");
    sftp_session = libssh2_sftp_init(session);

-    if (!sftp_session) {
+    if(!sftp_session) {
        fprintf(stderr, "Unable to init SFTP session\n");
        goto shutdown;
    }
@@ -237,7 +234,7 @@ int main(int argc, char *argv[])
    /* Request a dir listing via SFTP */
    sftp_handle = libssh2_sftp_opendir(sftp_session, sftppath);

-    if (!sftp_handle) {
+    if(!sftp_handle) {
        fprintf(stderr, "Unable to open dir with SFTP\n");
        goto shutdown;
    }
@@ -254,9 +251,10 @@ int main(int argc, char *argv[])
            /* rc is the length of the file name in the mem
               buffer */

-            if (longentry[0] != '\0') {
+            if(longentry[0] != '\0') {
                printf("%s\n", longentry);
-            } else {
+            }
+            else {
                if(attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) {
                    /* this should check what permissions it
                       is and print the output accordingly */
@@ -267,14 +265,14 @@ int main(int argc, char *argv[])
                }

                if(attrs.flags & LIBSSH2_SFTP_ATTR_UIDGID) {
-                    printf("%4ld %4ld ", attrs.uid, attrs.gid);
+                    printf("%4d %4d ", (int) attrs.uid, (int) attrs.gid);
                }
                else {
                    printf("   -    - ");
                }

                if(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) {
-                    printf("%8" PRIu64 " ", attrs.filesize);
+                    printf("%8" __FILESIZE " ", attrs.filesize);
                }

                printf("%s\n", mem);
@@ -283,14 +281,14 @@ int main(int argc, char *argv[])
        else
            break;

-    } while (1);
+    } while(1);

    libssh2_sftp_closedir(sftp_handle);
    libssh2_sftp_shutdown(sftp_session);

 shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session, "Normal Shutdown");
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/sftpdir_nonblock.c
+++ b/example/sftpdir_nonblock.c
@@ -36,21 +36,11 @@
 #include <stdio.h>
 #include <ctype.h>

-/* last resort for systems not defining PRIu64 in inttypes.h */
-#ifndef __PRI64_PREFIX
 #ifdef WIN32
-#define __PRI64_PREFIX "I64"
+#define __FILESIZE "I64"
 #else
-#if __WORDSIZE == 64
-#define __PRI64_PREFIX "l"
-#else
-#define __PRI64_PREFIX "ll"
-#endif /* __WORDSIZE */
-#endif /* WIN32 */
-#endif /* !__PRI64_PREFIX */
-#ifndef PRIu64
-#define PRIu64 __PRI64_PREFIX "u"
-#endif  /* PRIu64 */
+#define __FILESIZE "llu"
+#endif

 int main(int argc, char *argv[])
 {
@@ -59,9 +49,11 @@ int main(int argc, char *argv[])
    struct sockaddr_in sin;
    const char *fingerprint;
    LIBSSH2_SESSION *session;
-    const char *username="username";
-    const char *password="password";
-    const char *sftppath="/tmp/secretdir";
+    const char *username = "username";
+    const char *password = "password";
+    const char *sftppath = "/tmp/secretdir";
+    const char *pubkey = "/home/username/.ssh/id_rsa.pub";
+    const char *privkey = "/home/username/.ssh/id_rsa";
    int rc;
    LIBSSH2_SFTP *sftp_session;
    LIBSSH2_SFTP_HANDLE *sftp_handle;
@@ -70,16 +62,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -93,9 +86,9 @@ int main(int argc, char *argv[])
        sftppath = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -108,8 +101,8 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
-                sizeof(struct sockaddr_in)) != 0) {
+    if(connect(sock, (struct sockaddr*)(&sin),
+               sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
    }
@@ -126,8 +119,8 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */
-    while ((rc = libssh2_session_handshake(session, sock)) ==
-           LIBSSH2_ERROR_EAGAIN);
+    while((rc = libssh2_session_handshake(session, sock)) ==
+          LIBSSH2_ERROR_EAGAIN);
    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
@@ -145,21 +138,22 @@ int main(int argc, char *argv[])
    }
    fprintf(stderr, "\n");

-    if (auth_pw) {
+    if(auth_pw) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc = libssh2_userauth_password(session, username, password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else {
+    }
+    else {
        /* Or by public key */
-        while ((rc = libssh2_userauth_publickey_fromfile(session, username,
-                                                         "/home/username/.ssh/id_rsa.pub",
-                                                         "/home/username/.ssh/id_rsa",
-                                                         password)) == LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc = libssh2_userauth_publickey_fromfile(session, username,
+                                                        pubkey, privkey,
+                                                        password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
@@ -169,24 +163,24 @@ int main(int argc, char *argv[])
    do {
        sftp_session = libssh2_sftp_init(session);

-        if ((!sftp_session) && (libssh2_session_last_errno(session) !=
-                                LIBSSH2_ERROR_EAGAIN)) {
+        if((!sftp_session) && (libssh2_session_last_errno(session) !=
+                               LIBSSH2_ERROR_EAGAIN)) {
            fprintf(stderr, "Unable to init SFTP session\n");
            goto shutdown;
        }
-    } while (!sftp_session);
+    } while(!sftp_session);

    fprintf(stderr, "libssh2_sftp_opendir()!\n");
    /* Request a dir listing via SFTP */
    do {
        sftp_handle = libssh2_sftp_opendir(sftp_session, sftppath);

-        if ((!sftp_handle) && (libssh2_session_last_errno(session) !=
-                               LIBSSH2_ERROR_EAGAIN)) {
+        if((!sftp_handle) && (libssh2_session_last_errno(session) !=
+                              LIBSSH2_ERROR_EAGAIN)) {
            fprintf(stderr, "Unable to open dir with SFTP\n");
            goto shutdown;
        }
-    } while (!sftp_handle);
+    } while(!sftp_handle);

    fprintf(stderr, "libssh2_sftp_opendir() is done, now receive listing!\n");
    do {
@@ -194,8 +188,8 @@ int main(int argc, char *argv[])
        LIBSSH2_SFTP_ATTRIBUTES attrs;

        /* loop until we fail */
-        while ((rc = libssh2_sftp_readdir(sftp_handle, mem, sizeof(mem),
-                                          &attrs)) == LIBSSH2_ERROR_EAGAIN) {
+        while((rc = libssh2_sftp_readdir(sftp_handle, mem, sizeof(mem),
+                                         &attrs)) == LIBSSH2_ERROR_EAGAIN) {
            ;
        }
        if(rc > 0) {
@@ -206,37 +200,40 @@ int main(int argc, char *argv[])
                /* this should check what permissions it
                   is and print the output accordingly */
                printf("--fix----- ");
-            } else {
+            }
+            else {
                printf("---------- ");
            }

            if(attrs.flags & LIBSSH2_SFTP_ATTR_UIDGID) {
-                printf("%4ld %4ld ", attrs.uid, attrs.gid);
-            } else {
+                printf("%4d %4d ", (int) attrs.uid, (int) attrs.gid);
+            }
+            else {
                printf("   -    - ");
            }

            if(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) {
-                printf("%8" PRIu64 " ", attrs.filesize);
+                printf("%8" __FILESIZE " ", attrs.filesize);
            }

            printf("%s\n", mem);
        }
-        else if (rc == LIBSSH2_ERROR_EAGAIN) {
+        else if(rc == LIBSSH2_ERROR_EAGAIN) {
            /* blocking */
            fprintf(stderr, "Blocking\n");
-        } else {
+        }
+        else {
            break;
        }

-    } while (1);
+    } while(1);

    libssh2_sftp_closedir(sftp_handle);
    libssh2_sftp_shutdown(sftp_session);

  shutdown:

-    libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
+    libssh2_session_disconnect(session, "Normal Shutdown");
    libssh2_session_free(session);

 #ifdef WIN32
--- a/example/ssh2.c
+++ b/example/ssh2.c
@@ -37,10 +37,10 @@
 #include <ctype.h>


-const char *keyfile1="~/.ssh/id_rsa.pub";
-const char *keyfile2="~/.ssh/id_rsa";
-const char *username="username";
-const char *password="password";
+const char *keyfile1 = "~/.ssh/id_rsa.pub";
+const char *keyfile2 = "~/.ssh/id_rsa";
+const char *username = "username";
+const char *password = "password";


 static void kbd_callback(const char *name, int name_len,
@@ -54,7 +54,7 @@ static void kbd_callback(const char *name, int name_len,
    (void)name_len;
    (void)instruction;
    (void)instruction_len;
-    if (num_prompts == 1) {
+    if(num_prompts == 1) {
        responses[0].text = strdup(password);
        responses[0].length = strlen(password);
    }
@@ -77,16 +77,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -97,9 +98,9 @@ int main(int argc, char *argv[])
        password = argv[3];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -111,7 +112,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -121,7 +122,7 @@ int main(int argc, char *argv[])
     * banners, exchange keys, and setup crypto, compression, and MAC layers
     */
    session = libssh2_session_init();
-    if (libssh2_session_handshake(session, sock)) {
+    if(libssh2_session_handshake(session, sock)) {
        fprintf(stderr, "Failure establishing SSH session\n");
        return -1;
    }
@@ -141,64 +142,71 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "password") != NULL) {
+    if(strstr(userauthlist, "password") != NULL) {
        auth_pw |= 1;
    }
-    if (strstr(userauthlist, "keyboard-interactive") != NULL) {
+    if(strstr(userauthlist, "keyboard-interactive") != NULL) {
        auth_pw |= 2;
    }
-    if (strstr(userauthlist, "publickey") != NULL) {
+    if(strstr(userauthlist, "publickey") != NULL) {
        auth_pw |= 4;
    }

    /* if we got an 4. argument we set this option if supported */
    if(argc > 4) {
-        if ((auth_pw & 1) && !strcasecmp(argv[4], "-p")) {
+        if((auth_pw & 1) && !strcasecmp(argv[4], "-p")) {
            auth_pw = 1;
        }
-        if ((auth_pw & 2) && !strcasecmp(argv[4], "-i")) {
+        if((auth_pw & 2) && !strcasecmp(argv[4], "-i")) {
            auth_pw = 2;
        }
-        if ((auth_pw & 4) && !strcasecmp(argv[4], "-k")) {
+        if((auth_pw & 4) && !strcasecmp(argv[4], "-k")) {
            auth_pw = 4;
        }
    }

-    if (auth_pw & 1) {
+    if(auth_pw & 1) {
        /* We could authenticate via password */
-        if (libssh2_userauth_password(session, username, password)) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "\tAuthentication by password failed!\n");
            goto shutdown;
-        } else {
+        }
+        else {
            fprintf(stderr, "\tAuthentication by password succeeded.\n");
        }
-    } else if (auth_pw & 2) {
+    }
+    else if(auth_pw & 2) {
        /* Or via keyboard-interactive */
-        if (libssh2_userauth_keyboard_interactive(session, username,
-                                                  &kbd_callback) ) {
+        if(libssh2_userauth_keyboard_interactive(session, username,
+                                                 &kbd_callback) ) {
            fprintf(stderr,
-                "\tAuthentication by keyboard-interactive failed!\n");
+                    "\tAuthentication by keyboard-interactive failed!\n");
            goto shutdown;
-        } else {
-            fprintf(stderr,
-                "\tAuthentication by keyboard-interactive succeeded.\n");
        }
-    } else if (auth_pw & 4) {
+        else {
+            fprintf(stderr,
+                    "\tAuthentication by keyboard-interactive succeeded.\n");
+        }
+    }
+    else if(auth_pw & 4) {
        /* Or by public key */
-        if (libssh2_userauth_publickey_fromfile(session, username, keyfile1,
-                                                keyfile2, password)) {
+        if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
+                                               keyfile2, password)) {
            fprintf(stderr, "\tAuthentication by public key failed!\n");
            goto shutdown;
-        } else {
+        }
+        else {
            fprintf(stderr, "\tAuthentication by public key succeeded.\n");
        }
-    } else {
+    }
+    else {
        fprintf(stderr, "No supported authentication methods found!\n");
        goto shutdown;
    }

    /* Request a shell */
-    if (!(channel = libssh2_channel_open_session(session))) {
+    channel = libssh2_channel_open_session(session);
+    if(!channel) {
        fprintf(stderr, "Unable to open a session\n");
        goto shutdown;
    }
@@ -211,13 +219,13 @@ int main(int argc, char *argv[])
    /* Request a terminal with 'vanilla' terminal emulation
     * See /etc/termcap for more options
     */
-    if (libssh2_channel_request_pty(channel, "vanilla")) {
+    if(libssh2_channel_request_pty(channel, "vanilla")) {
        fprintf(stderr, "Failed requesting pty\n");
        goto skip_shell;
    }

    /* Open a SHELL on that pty */
-    if (libssh2_channel_shell(channel)) {
+    if(libssh2_channel_shell(channel)) {
        fprintf(stderr, "Unable to request shell on allocated pty\n");
        goto shutdown;
    }
@@ -236,14 +244,14 @@ int main(int argc, char *argv[])
     */

  skip_shell:
-    if (channel) {
+    if(channel) {
        libssh2_channel_free(channel);
        channel = NULL;
    }

    /* Other channel types are supported via:
     * libssh2_scp_send()
-     * libssh2_scp_recv()
+     * libssh2_scp_recv2()
     * libssh2_channel_direct_tcpip()
     */

--- a/example/ssh2_agent.c
+++ b/example/ssh2_agent.c
@@ -36,7 +36,7 @@
 #include <ctype.h>
 #include <stdlib.h>

-const char *username="username";
+const char *username = "username";

 int main(int argc, char *argv[])
 {
@@ -54,16 +54,17 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1) {
+    if(argc > 1) {
        hostaddr = inet_addr(argv[1]);
-    } else {
+    }
+    else {
        hostaddr = htonl(0x7F000001);
    }

@@ -71,9 +72,9 @@ int main(int argc, char *argv[])
        username = argv[2];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -81,7 +82,7 @@ int main(int argc, char *argv[])
     * responsible for creating the socket establishing the connection
     */
    sock = socket(AF_INET, SOCK_STREAM, 0);
-    if (sock == -1) {
+    if(sock == -1) {
        fprintf(stderr, "failed to create socket!\n");
        rc = 1;
        goto shutdown;
@@ -90,7 +91,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        goto shutdown;
@@ -100,7 +101,7 @@ int main(int argc, char *argv[])
     * banners, exchange keys, and setup crypto, compression, and MAC layers
     */
    session = libssh2_session_init();
-    if (libssh2_session_handshake(session, sock)) {
+    if(libssh2_session_handshake(session, sock)) {
        fprintf(stderr, "Failure establishing SSH session\n");
        return 1;
    }
@@ -120,43 +121,44 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "publickey") == NULL) {
+    if(strstr(userauthlist, "publickey") == NULL) {
        fprintf(stderr, "\"publickey\" authentication is not supported\n");
        goto shutdown;
    }

    /* Connect to the ssh-agent */
    agent = libssh2_agent_init(session);
-    if (!agent) {
+    if(!agent) {
        fprintf(stderr, "Failure initializing ssh-agent support\n");
        rc = 1;
        goto shutdown;
    }
-    if (libssh2_agent_connect(agent)) {
+    if(libssh2_agent_connect(agent)) {
        fprintf(stderr, "Failure connecting to ssh-agent\n");
        rc = 1;
        goto shutdown;
    }
-    if (libssh2_agent_list_identities(agent)) {
+    if(libssh2_agent_list_identities(agent)) {
        fprintf(stderr, "Failure requesting identities to ssh-agent\n");
        rc = 1;
        goto shutdown;
    }
-    while (1) {
+    while(1) {
        rc = libssh2_agent_get_identity(agent, &identity, prev_identity);
-        if (rc == 1)
+        if(rc == 1)
            break;
-        if (rc < 0) {
+        if(rc < 0) {
            fprintf(stderr,
                    "Failure obtaining identity from ssh-agent support\n");
            rc = 1;
            goto shutdown;
        }
-        if (libssh2_agent_userauth(agent, username, identity)) {
+        if(libssh2_agent_userauth(agent, username, identity)) {
            fprintf(stderr, "\tAuthentication with username %s and "
                   "public key %s failed!\n",
                   username, identity->comment);
-        } else {
+        }
+        else {
            fprintf(stderr, "\tAuthentication with username %s and "
                   "public key %s succeeded!\n",
                   username, identity->comment);
@@ -164,7 +166,7 @@ int main(int argc, char *argv[])
        }
        prev_identity = identity;
    }
-    if (rc) {
+    if(rc) {
        fprintf(stderr, "Couldn't continue authentication\n");
        goto shutdown;
    }
@@ -172,7 +174,8 @@ int main(int argc, char *argv[])
    /* We're authenticated now. */

    /* Request a shell */
-    if (!(channel = libssh2_channel_open_session(session))) {
+    channel = libssh2_channel_open_session(session);
+    if(!channel) {
        fprintf(stderr, "Unable to open a session\n");
        goto shutdown;
    }
@@ -185,13 +188,13 @@ int main(int argc, char *argv[])
    /* Request a terminal with 'vanilla' terminal emulation
     * See /etc/termcap for more options
     */
-    if (libssh2_channel_request_pty(channel, "vanilla")) {
+    if(libssh2_channel_request_pty(channel, "vanilla")) {
        fprintf(stderr, "Failed requesting pty\n");
        goto skip_shell;
    }

    /* Open a SHELL on that pty */
-    if (libssh2_channel_shell(channel)) {
+    if(libssh2_channel_shell(channel)) {
        fprintf(stderr, "Unable to request shell on allocated pty\n");
        goto shutdown;
    }
@@ -210,21 +213,23 @@ int main(int argc, char *argv[])
     */

  skip_shell:
-    if (channel) {
+    if(channel) {
        libssh2_channel_free(channel);
        channel = NULL;
    }

    /* Other channel types are supported via:
     * libssh2_scp_send()
-     * libssh2_scp_recv()
+     * libssh2_scp_recv2()
     * libssh2_channel_direct_tcpip()
     */

  shutdown:

-    libssh2_agent_disconnect(agent);
-    libssh2_agent_free(agent);
+    if(agent) {
+        libssh2_agent_disconnect(agent);
+        libssh2_agent_free(agent);
+    }

    if(session) {
        libssh2_session_disconnect(session,
@@ -232,7 +237,7 @@ int main(int argc, char *argv[])
        libssh2_session_free(session);
    }

-    if (sock != -1) {
+    if(sock != -1) {
 #ifdef WIN32
        closesocket(sock);
 #else
--- a/example/ssh2_agent_forwarding.c
+++ b/example/ssh2_agent_forwarding.c
@@ -0,0 +1,292 @@
+/*
+ * Sample showing how to use libssh2 to request agent forwarding
+ * on the remote host. The command executed will run with agent forwarded
+ * so you should be able to do things like clone out protected git
+ * repos and such.
+ *
+ * The example uses agent authentication to ensure an agent to forward
+ * is running.
+ *
+ * Run it like this:
+ *
+ * $ ./ssh2_agent_forwarding 127.0.0.1 user "uptime"
+ *
+ */
+
+#include "libssh2_config.h"
+#include <libssh2.h>
+
+#ifdef HAVE_WINSOCK2_H
+# include <winsock2.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+# ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/types.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+
+static int waitsocket(int socket_fd, LIBSSH2_SESSION *session)
+{
+    struct timeval timeout;
+    int rc;
+    fd_set fd;
+    fd_set *writefd = NULL;
+    fd_set *readfd = NULL;
+    int dir;
+
+    timeout.tv_sec = 10;
+    timeout.tv_usec = 0;
+
+    FD_ZERO(&fd);
+
+    FD_SET(socket_fd, &fd);
+
+    /* now make sure we wait in the correct direction */
+    dir = libssh2_session_block_directions(session);
+
+    if(dir & LIBSSH2_SESSION_BLOCK_INBOUND)
+        readfd = &fd;
+
+    if(dir & LIBSSH2_SESSION_BLOCK_OUTBOUND)
+        writefd = &fd;
+
+    rc = select(socket_fd + 1, readfd, writefd, NULL, &timeout);
+
+    return rc;
+}
+
+int main(int argc, char *argv[])
+{
+    const char *hostname = "127.0.0.1";
+    const char *commandline = "uptime";
+    const char *username    = NULL;
+    unsigned long hostaddr;
+    int sock;
+    struct sockaddr_in sin;
+    LIBSSH2_SESSION *session;
+    LIBSSH2_CHANNEL *channel;
+    LIBSSH2_AGENT *agent = NULL;
+    struct libssh2_agent_publickey *identity, *prev_identity = NULL;
+    int rc;
+    int exitcode;
+    char *exitsignal = (char *)"none";
+    int bytecount = 0;
+
+#ifdef WIN32
+    WSADATA wsadata;
+    WSAStartup(MAKEWORD(2, 0), &wsadata);
+#endif
+    if(argc < 2) {
+        fprintf(stderr, "At least IP and username arguments are required.\n");
+        return 1;
+    }
+    /* must be ip address only */
+    hostname = argv[1];
+    username = argv[2];
+
+    if(argc > 3) {
+        commandline = argv[3];
+    }
+
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
+        return 1;
+    }
+
+    hostaddr = inet_addr(hostname);
+
+    /* Ultra basic "connect to port 22 on localhost"
+     * Your code is responsible for creating the socket establishing the
+     * connection
+     */
+    sock = socket(AF_INET, SOCK_STREAM, 0);
+
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons(22);
+    sin.sin_addr.s_addr = hostaddr;
+    if(connect(sock, (struct sockaddr*)(&sin),
+                sizeof(struct sockaddr_in)) != 0) {
+        fprintf(stderr, "failed to connect!\n");
+        return -1;
+    }
+
+    /* Create a session instance */
+    session = libssh2_session_init();
+    if(!session)
+        return -1;
+
+    if(libssh2_session_handshake(session, sock) != 0) {
+        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
+        return -1;
+    }
+
+    /* Connect to the ssh-agent */
+    agent = libssh2_agent_init(session);
+    if(!agent) {
+        fprintf(stderr, "Failure initializing ssh-agent support\n");
+        rc = 1;
+        goto shutdown;
+    }
+    if(libssh2_agent_connect(agent)) {
+        fprintf(stderr, "Failure connecting to ssh-agent\n");
+        rc = 1;
+        goto shutdown;
+    }
+    if(libssh2_agent_list_identities(agent)) {
+        fprintf(stderr, "Failure requesting identities to ssh-agent\n");
+        rc = 1;
+        goto shutdown;
+    }
+    while(1) {
+        rc = libssh2_agent_get_identity(agent, &identity, prev_identity);
+        if(rc == 1)
+            break;
+        if(rc < 0) {
+            fprintf(stderr,
+                    "Failure obtaining identity from ssh-agent support\n");
+            rc = 1;
+            goto shutdown;
+        }
+        if(libssh2_agent_userauth(agent, username, identity)) {
+            fprintf(stderr, "\tAuthentication with username %s and "
+                   "public key %s failed!\n",
+                   username, identity->comment);
+        }
+        else {
+            fprintf(stderr, "\tAuthentication with username %s and "
+                   "public key %s succeeded!\n",
+                   username, identity->comment);
+            break;
+        }
+        prev_identity = identity;
+    }
+    if(rc) {
+        fprintf(stderr, "Couldn't continue authentication\n");
+        goto shutdown;
+    }
+
+#if 0
+    libssh2_trace(session, ~0);
+#endif
+
+    /* Set session to non-blocking */
+    libssh2_session_set_blocking(session, 0);
+
+    /* Exec non-blocking on the remove host */
+    while((channel = libssh2_channel_open_session(session)) == NULL &&
+          libssh2_session_last_error(session, NULL, NULL, 0) ==
+          LIBSSH2_ERROR_EAGAIN) {
+        waitsocket(sock, session);
+    }
+    if(channel == NULL) {
+        fprintf(stderr, "Error\n");
+        exit(1);
+    }
+    while((rc = libssh2_channel_request_auth_agent(channel)) ==
+          LIBSSH2_ERROR_EAGAIN) {
+        waitsocket(sock, session);
+    }
+    if(rc != 0) {
+        fprintf(stderr, "Error, couldn't request auth agent, error code %d.\n",
+                rc);
+        exit(1);
+    }
+    else {
+        fprintf(stdout, "\tAgent forwarding request succeeded!\n");
+    }
+    while((rc = libssh2_channel_exec(channel, commandline)) ==
+          LIBSSH2_ERROR_EAGAIN) {
+        waitsocket(sock, session);
+    }
+    if(rc != 0) {
+        fprintf(stderr, "Error\n");
+        exit(1);
+    }
+    for(;;) {
+        /* loop until we block */
+        int rc;
+        do {
+            char buffer[0x4000];
+            rc = libssh2_channel_read(channel, buffer, sizeof(buffer) );
+            if(rc > 0) {
+                int i;
+                bytecount += rc;
+                fprintf(stderr, "We read:\n");
+                for(i = 0; i < rc; ++i)
+                    fputc(buffer[i], stderr);
+                fprintf(stderr, "\n");
+            }
+            else {
+                if(rc != LIBSSH2_ERROR_EAGAIN)
+                    /* no need to output this for the EAGAIN case */
+                    fprintf(stderr, "libssh2_channel_read returned %d\n", rc);
+            }
+        }
+        while(rc > 0);
+
+        /* this is due to blocking that would occur otherwise so we loop on
+           this condition */
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
+            waitsocket(sock, session);
+        }
+        else
+            break;
+    }
+    exitcode = 127;
+    while((rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN) {
+        waitsocket(sock, session);
+    }
+    if(rc == 0) {
+        exitcode = libssh2_channel_get_exit_status(channel);
+        libssh2_channel_get_exit_signal(channel, &exitsignal,
+                                        NULL, NULL, NULL, NULL, NULL);
+    }
+
+    if(exitsignal) {
+        printf("\nGot signal: %s\n", exitsignal);
+    }
+    else {
+        printf("\nEXIT: %d bytecount: %d\n", exitcode, bytecount);
+    }
+
+    libssh2_channel_free(channel);
+    channel = NULL;
+
+shutdown:
+
+    libssh2_session_disconnect(session,
+                               "Normal Shutdown, Thank you for playing");
+    libssh2_session_free(session);
+
+#ifdef WIN32
+    closesocket(sock);
+#else
+    close(sock);
+#endif
+    fprintf(stderr, "all done\n");
+
+    libssh2_exit();
+
+    return 0;
+}
--- a/example/ssh2_echo.c
+++ b/example/ssh2_echo.c
@@ -87,7 +87,7 @@ int main(int argc, char *argv[])
    LIBSSH2_CHANNEL *channel;
    int rc;
    int exitcode = 0;
-    char *exitsignal=(char *)"none";
+    char *exitsignal = (char *)"none";
    size_t len;
    LIBSSH2_KNOWNHOSTS *nh;
    int type;
@@ -96,27 +96,27 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1)
+    if(argc > 1)
        /* must be ip address only */
        hostname = argv[1];

-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -131,7 +131,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -139,7 +139,7 @@ int main(int argc, char *argv[])

    /* Create a session instance */
    session = libssh2_session_init();
-    if (!session)
+    if(!session)
        return -1;

    /* tell libssh2 we want it all done non-blocking */
@@ -148,9 +148,9 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */
-    while ((rc = libssh2_session_handshake(session, sock)) ==
+    while((rc = libssh2_session_handshake(session, sock)) ==
           LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }
@@ -193,11 +193,11 @@ int main(int argc, char *argv[])
    }
    libssh2_knownhost_free(nh);

-    if ( strlen(password) != 0 ) {
+    if(strlen(password) != 0) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
-               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        while((rc = libssh2_userauth_password(session, username, password)) ==
+              LIBSSH2_ERROR_EAGAIN);
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            exit(1);
        }
@@ -206,22 +206,22 @@ int main(int argc, char *argv[])
    libssh2_trace(session, LIBSSH2_TRACE_SOCKET);

    /* Exec non-blocking on the remove host */
-    while( (channel = libssh2_channel_open_session(session)) == NULL &&
-           libssh2_session_last_error(session,NULL,NULL,0) ==
-           LIBSSH2_ERROR_EAGAIN ) {
+    while((channel = libssh2_channel_open_session(session)) == NULL &&
+          libssh2_session_last_error(session, NULL, NULL, 0) ==
+          LIBSSH2_ERROR_EAGAIN) {
        waitsocket(sock, session);
    }
-    if( channel == NULL ) {
-        fprintf(stderr,"Error\n");
-        exit( 1 );
+    if(channel == NULL) {
+        fprintf(stderr, "Error\n");
+        exit(1);
    }
-    while( (rc = libssh2_channel_exec(channel, commandline)) ==
-           LIBSSH2_ERROR_EAGAIN )
+    while((rc = libssh2_channel_exec(channel, commandline)) ==
+          LIBSSH2_ERROR_EAGAIN)
        waitsocket(sock, session);

-    if( rc != 0 ) {
+    if(rc != 0) {
        fprintf(stderr, "exec error\n");
-        exit( 1 );
+        exit(1);
    }
    else {
        LIBSSH2_POLLFD *fds = NULL;
@@ -236,10 +236,11 @@ int main(int argc, char *argv[])
        int rewrites = 0;
        int i;

-        for (i = 0; i < BUFSIZE; i++)
+        for(i = 0; i < BUFSIZE; i++)
            buffer[i] = 'A';

-        if ((fds = malloc (sizeof (LIBSSH2_POLLFD))) == NULL) {
+        fds = malloc(sizeof (LIBSSH2_POLLFD));
+        if(!fds) {
            fprintf(stderr, "malloc failed\n");
            exit(1);
        }
@@ -252,18 +253,18 @@ int main(int argc, char *argv[])
            int rc = (libssh2_poll(fds, 1, 10));
            int act = 0;

-            if (rc < 1)
+            if(rc < 1)
                continue;

-            if (fds[0].revents & LIBSSH2_POLLFD_POLLIN) {
+            if(fds[0].revents & LIBSSH2_POLLFD_POLLIN) {
                int n = libssh2_channel_read(channel, buffer, sizeof(buffer));
                act++;

-                if (n == LIBSSH2_ERROR_EAGAIN) {
+                if(n == LIBSSH2_ERROR_EAGAIN) {
                    rereads++;
                    fprintf(stderr, "will read again\n");
                }
-                else if (n < 0) {
+                else if(n < 0) {
                    fprintf(stderr, "read failed\n");
                    exit(1);
                }
@@ -274,20 +275,20 @@ int main(int argc, char *argv[])
                }
            }

-            if (fds[0].revents & LIBSSH2_POLLFD_POLLOUT) {
+            if(fds[0].revents & LIBSSH2_POLLFD_POLLOUT) {
                act++;

-                if (totwritten < totsize) {
+                if(totwritten < totsize) {
                    /* we have not written all data yet */
                    int left = totsize - totwritten;
                    int size = (left < bufsize) ? left : bufsize;
                    int n = libssh2_channel_write_ex(channel, 0, buffer, size);

-                    if (n == LIBSSH2_ERROR_EAGAIN) {
+                    if(n == LIBSSH2_ERROR_EAGAIN) {
                        rewrites++;
                        fprintf(stderr, "will write again\n");
                    }
-                    else if (n < 0) {
+                    else if(n < 0) {
                        fprintf(stderr, "write failed\n");
                        exit(1);
                    }
@@ -295,20 +296,21 @@ int main(int argc, char *argv[])
                        totwritten += n;
                        fprintf(stderr, "wrote %d bytes (%d in total)",
                                n, totwritten);
-                        if (left >= bufsize && n != bufsize) {
+                        if(left >= bufsize && n != bufsize) {
                            partials++;
                            fprintf(stderr, " PARTIAL");
                        }
                        fprintf(stderr, "\n");
                    }
-                } else {
+                }
+                else {
                    /* all data written, send EOF */
                    rc = libssh2_channel_send_eof(channel);

-                    if (rc == LIBSSH2_ERROR_EAGAIN) {
+                    if(rc == LIBSSH2_ERROR_EAGAIN) {
                        fprintf(stderr, "will send eof again\n");
                    }
-                    else if (rc < 0) {
+                    else if(rc < 0) {
                        fprintf(stderr, "send eof failed\n");
                        exit(1);
                    }
@@ -320,23 +322,23 @@ int main(int argc, char *argv[])
                }
            }

-            if (fds[0].revents & LIBSSH2_POLLFD_CHANNEL_CLOSED) {
-                if (!act) /* don't leave loop until we have read all data */
+            if(fds[0].revents & LIBSSH2_POLLFD_CHANNEL_CLOSED) {
+                if(!act) /* don't leave loop until we have read all data */
                    running = 0;
            }
        } while(running);

        exitcode = 127;
-        while( (rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN )
+        while((rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN)
            waitsocket(sock, session);

-        if( rc == 0 ) {
-            exitcode = libssh2_channel_get_exit_status( channel );
+        if(rc == 0) {
+            exitcode = libssh2_channel_get_exit_status(channel);
            libssh2_channel_get_exit_signal(channel, &exitsignal,
                                            NULL, NULL, NULL, NULL, NULL);
        }

-        if (exitsignal)
+        if(exitsignal)
            fprintf(stderr, "\nGot signal: %s\n", exitsignal);

        libssh2_channel_free(channel);
@@ -345,7 +347,7 @@ int main(int argc, char *argv[])
        fprintf(stderr, "\nrereads: %d rewrites: %d totwritten %d\n",
                rereads, rewrites, totwritten);

-        if (totwritten != totread) {
+        if(totwritten != totread) {
            fprintf(stderr, "\n*** FAIL bytes written: %d bytes "
                    "read: %d ***\n", totwritten, totread);
            exit(1);
--- a/example/ssh2_exec.c
+++ b/example/ssh2_exec.c
@@ -87,7 +87,7 @@ int main(int argc, char *argv[])
    LIBSSH2_CHANNEL *channel;
    int rc;
    int exitcode;
-    char *exitsignal=(char *)"none";
+    char *exitsignal = (char *)"none";
    int bytecount = 0;
    size_t len;
    LIBSSH2_KNOWNHOSTS *nh;
@@ -97,30 +97,30 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
 #endif

-    if (argc > 1)
+    if(argc > 1)
        /* must be ip address only */
        hostname = argv[1];

-    if (argc > 2) {
+    if(argc > 2) {
        username = argv[2];
    }
-    if (argc > 3) {
+    if(argc > 3) {
        password = argv[3];
    }
-    if (argc > 4) {
+    if(argc > 4) {
        commandline = argv[4];
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

@@ -135,7 +135,7 @@ int main(int argc, char *argv[])
    sin.sin_family = AF_INET;
    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -143,7 +143,7 @@ int main(int argc, char *argv[])

    /* Create a session instance */
    session = libssh2_session_init();
-    if (!session)
+    if(!session)
        return -1;

    /* tell libssh2 we want it all done non-blocking */
@@ -152,9 +152,9 @@ int main(int argc, char *argv[])
    /* ... start it up. This will trade welcome banners, exchange keys,
     * and setup crypto, compression, and MAC layers
     */
-    while ((rc = libssh2_session_handshake(session, sock)) ==
+    while((rc = libssh2_session_handshake(session, sock)) ==
           LIBSSH2_ERROR_EAGAIN);
-    if (rc) {
+    if(rc) {
        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
        return -1;
    }
@@ -206,104 +206,95 @@ int main(int argc, char *argv[])
    }
    libssh2_knownhost_free(nh);

-    if ( strlen(password) != 0 ) {
+    if(strlen(password) != 0) {
        /* We could authenticate via password */
-        while ((rc = libssh2_userauth_password(session, username, password)) ==
+        while((rc = libssh2_userauth_password(session, username, password)) ==
               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        if(rc) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
    }
    else {
        /* Or by public key */
-        while ((rc = libssh2_userauth_publickey_fromfile(session, username,
+        while((rc = libssh2_userauth_publickey_fromfile(session, username,
                                                         "/home/user/"
                                                         ".ssh/id_rsa.pub",
                                                         "/home/user/"
                                                         ".ssh/id_rsa",
                                                         password)) ==
               LIBSSH2_ERROR_EAGAIN);
-        if (rc) {
+        if(rc) {
            fprintf(stderr, "\tAuthentication by public key failed\n");
            goto shutdown;
        }
    }

 #if 0
-    libssh2_trace(session, ~0 );
+    libssh2_trace(session, ~0);
 #endif

    /* Exec non-blocking on the remove host */
-    while( (channel = libssh2_channel_open_session(session)) == NULL &&
-           libssh2_session_last_error(session,NULL,NULL,0) ==
-           LIBSSH2_ERROR_EAGAIN )
-    {
+    while((channel = libssh2_channel_open_session(session)) == NULL &&
+          libssh2_session_last_error(session, NULL, NULL, 0) ==
+          LIBSSH2_ERROR_EAGAIN) {
        waitsocket(sock, session);
    }
-    if( channel == NULL )
-    {
-        fprintf(stderr,"Error\n");
-        exit( 1 );
+    if(channel == NULL) {
+        fprintf(stderr, "Error\n");
+        exit(1);
    }
-    while( (rc = libssh2_channel_exec(channel, commandline)) ==
-           LIBSSH2_ERROR_EAGAIN )
-    {
+    while((rc = libssh2_channel_exec(channel, commandline)) ==
+           LIBSSH2_ERROR_EAGAIN) {
        waitsocket(sock, session);
    }
-    if( rc != 0 )
-    {
-        fprintf(stderr,"Error\n");
-        exit( 1 );
+    if(rc != 0) {
+        fprintf(stderr, "Error\n");
+        exit(1);
    }
-    for( ;; )
-    {
+    for(;;) {
        /* loop until we block */
        int rc;
-        do
-        {
+        do {
            char buffer[0x4000];
-            rc = libssh2_channel_read( channel, buffer, sizeof(buffer) );
-            if( rc > 0 )
-            {
+            rc = libssh2_channel_read(channel, buffer, sizeof(buffer) );
+            if(rc > 0) {
                int i;
                bytecount += rc;
                fprintf(stderr, "We read:\n");
-                for( i=0; i < rc; ++i )
-                    fputc( buffer[i], stderr);
+                for(i = 0; i < rc; ++i)
+                    fputc(buffer[i], stderr);
                fprintf(stderr, "\n");
            }
            else {
-                if( rc != LIBSSH2_ERROR_EAGAIN )
+                if(rc != LIBSSH2_ERROR_EAGAIN)
                    /* no need to output this for the EAGAIN case */
                    fprintf(stderr, "libssh2_channel_read returned %d\n", rc);
            }
        }
-        while( rc > 0 );
+        while(rc > 0);

        /* this is due to blocking that would occur otherwise so we loop on
           this condition */
-        if( rc == LIBSSH2_ERROR_EAGAIN )
-        {
+        if(rc == LIBSSH2_ERROR_EAGAIN) {
            waitsocket(sock, session);
        }
        else
            break;
    }
    exitcode = 127;
-    while( (rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN )
+    while((rc = libssh2_channel_close(channel)) == LIBSSH2_ERROR_EAGAIN)
        waitsocket(sock, session);

-    if( rc == 0 )
-    {
-        exitcode = libssh2_channel_get_exit_status( channel );
+    if(rc == 0) {
+        exitcode = libssh2_channel_get_exit_status(channel);
        libssh2_channel_get_exit_signal(channel, &exitsignal,
                                        NULL, NULL, NULL, NULL, NULL);
    }

-    if (exitsignal)
+    if(exitsignal)
        fprintf(stderr, "\nGot signal: %s\n", exitsignal);
-    else 
+    else
        fprintf(stderr, "\nEXIT: %d bytecount: %d\n", exitcode, bytecount);

    libssh2_channel_free(channel);
--- a/example/subsystem_netconf.c
+++ b/example/subsystem_netconf.c
@@ -57,12 +57,12 @@ static int netconf_write(LIBSSH2_CHANNEL *channel, const char *buf, size_t len)

    do {
        i = libssh2_channel_write(channel, buf, len);
-        if (i < 0) {
+        if(i < 0) {
            fprintf(stderr, "libssh2_channel_write: %d\n", i);
            return -1;
        }
        wr += i;
-    } while (i > 0 && wr < (ssize_t)len);
+    } while(i > 0 && wr < (ssize_t)len);

    return 0;
 }
@@ -78,9 +78,9 @@ static int netconf_read_until(LIBSSH2_CHANNEL *channel, const char *endtag,

    do {
        len = libssh2_channel_read(channel, buf + rd, buflen - rd);
-        if (LIBSSH2_ERROR_EAGAIN == len)
+        if(LIBSSH2_ERROR_EAGAIN == len)
            continue;
-        else if (len < 0) {
+        else if(len < 0) {
            fprintf(stderr, "libssh2_channel_read: %d\n", (int)len);
            return -1;
        }
@@ -92,13 +92,14 @@ static int netconf_read_until(LIBSSH2_CHANNEL *channel, const char *endtag,
        /* really, this MUST be replaced with proper XML parsing! */

        endreply = strstr(buf, endtag);
-        if (endreply)
+        if(endreply)
            specialsequence = strstr(endreply, "]]>]]>");

-    } while (!specialsequence && rd < buflen);
+    } while(!specialsequence && rd < buflen);

-    if (!specialsequence) {
-        fprintf(stderr, "%s: ]]>]]> not found! read buffer too small?\n", __func__);
+    if(!specialsequence) {
+        fprintf(stderr, "%s: ]]>]]> not found! read buffer too small?\n",
+                __func__);
        return -1;
    }

@@ -125,8 +126,8 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
@@ -134,40 +135,41 @@ int main(int argc, char *argv[])
    int sock = -1;
 #endif

-    if (argc > 1)
+    if(argc > 1)
        server_ip = argv[1];
-    if (argc > 2)
+    if(argc > 2)
        username = argv[2];
-    if (argc > 3)
+    if(argc > 3)
        password = argv[3];

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    /* Connect to SSH server */
    sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 #ifdef WIN32
-    if (sock == INVALID_SOCKET) {
+    if(sock == INVALID_SOCKET) {
        fprintf(stderr, "failed to open socket!\n");
        return -1;
    }
 #else
-    if (sock == -1) {
+    if(sock == -1) {
        perror("socket");
        return -1;
    }
 #endif

    sin.sin_family = AF_INET;
-    if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(server_ip))) {
+    sin.sin_addr.s_addr = inet_addr(server_ip);
+    if(INADDR_NONE == sin.sin_addr.s_addr) {
        fprintf(stderr, "inet_addr: Invalid IP address \"%s\"\n", server_ip);
        return -1;
    }
    sin.sin_port = htons(830);
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "Failed to connect to %s!\n", inet_ntoa(sin.sin_addr));
        return -1;
@@ -203,39 +205,41 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "password"))
+    if(strstr(userauthlist, "password"))
        auth |= AUTH_PASSWORD;
-    if (strstr(userauthlist, "publickey"))
+    if(strstr(userauthlist, "publickey"))
        auth |= AUTH_PUBLICKEY;

    /* check for options */
    if(argc > 4) {
-        if ((auth & AUTH_PASSWORD) && !strcasecmp(argv[4], "-p"))
+        if((auth & AUTH_PASSWORD) && !strcasecmp(argv[4], "-p"))
            auth = AUTH_PASSWORD;
-        if ((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[4], "-k"))
+        if((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[4], "-k"))
            auth = AUTH_PUBLICKEY;
    }

-    if (auth & AUTH_PASSWORD) {
-        if (libssh2_userauth_password(session, username, password)) {
+    if(auth & AUTH_PASSWORD) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else if (auth & AUTH_PUBLICKEY) {
-        if (libssh2_userauth_publickey_fromfile(session, username, keyfile1,
+    }
+    else if(auth & AUTH_PUBLICKEY) {
+        if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
                                                keyfile2, password)) {
            fprintf(stderr, "Authentication by public key failed!\n");
            goto shutdown;
        }
        fprintf(stderr, "Authentication by public key succeeded.\n");
-    } else {
+    }
+    else {
        fprintf(stderr, "No supported authentication methods found!\n");
        goto shutdown;
    }

    /* open a channel */
    channel = libssh2_channel_open_session(session);
-    if (!channel) {
+    if(!channel) {
        fprintf(stderr, "Could not open the channel!\n"
                "(Note that this can be a problem at the server!"
                " Please review the server logs.)\n");
@@ -243,14 +247,14 @@ int main(int argc, char *argv[])
    }

    /* execute the subsystem on our channel */
-    if (libssh2_channel_subsystem(channel, "netconf")) {
+    if(libssh2_channel_subsystem(channel, "netconf")) {
        fprintf(stderr, "Could not execute the \"netconf\" subsystem!\n"
                "(Note that this can be a problem at the server!"
                " Please review the server logs.)\n");
        goto shutdown;
    }

-    /* NETCONF: http://tools.ietf.org/html/draft-ietf-netconf-ssh-06 */
+    /* NETCONF: https://tools.ietf.org/html/draft-ietf-netconf-ssh-06 */

    fprintf(stderr, "Sending NETCONF client <hello>\n");
    snprintf(buf, sizeof(buf),
@@ -261,15 +265,16 @@ int main(int argc, char *argv[])
      "</capabilities>"
      "</hello>\n"
      "]]>]]>\n%n", (int *)&len);
-    if (-1 == netconf_write(channel, buf, len))
+    if(-1 == netconf_write(channel, buf, len))
        goto shutdown;

    fprintf(stderr, "Reading NETCONF server <hello>\n");
    len = netconf_read_until(channel, "</hello>", buf, sizeof(buf));
-    if (-1 == len)
+    if(-1 == len)
        goto shutdown;

-    fprintf(stderr, "Got %d bytes:\n----------------------\n%s", (int)len, buf);
+    fprintf(stderr, "Got %d bytes:\n----------------------\n%s",
+            (int)len, buf);

    fprintf(stderr, "Sending NETCONF <rpc>\n");
    snprintf(buf, sizeof(buf),
@@ -278,18 +283,19 @@ int main(int argc, char *argv[])
      "<get-interface-information><terse/></get-interface-information>"
      "</rpc>\n"
      "]]>]]>\n%n", (int *)&len);
-    if (-1 == netconf_write(channel, buf, len))
+    if(-1 == netconf_write(channel, buf, len))
        goto shutdown;

    fprintf(stderr, "Reading NETCONF <rpc-reply>\n");
    len = netconf_read_until(channel, "</rpc-reply>", buf, sizeof(buf));
-    if (-1 == len)
+    if(-1 == len)
        goto shutdown;

-    fprintf(stderr, "Got %d bytes:\n----------------------\n%s", (int)len, buf);
+    fprintf(stderr, "Got %d bytes:\n----------------------\n%s",
+            (int)len, buf);

 shutdown:
-    if (channel)
+    if(channel)
        libssh2_channel_free(channel);
    libssh2_session_disconnect(session, "Client disconnecting normally");
    libssh2_session_free(session);
--- a/example/tcpip-forward.c
+++ b/example/tcpip-forward.c
@@ -70,8 +70,8 @@ int main(int argc, char *argv[])
    WSADATA wsadata;
    int err;

-    err = WSAStartup(MAKEWORD(2,0), &wsadata);
-    if (err != 0) {
+    err = WSAStartup(MAKEWORD(2, 0), &wsadata);
+    if(err != 0) {
        fprintf(stderr, "WSAStartup failed with error: %d\n", err);
        return 1;
    }
@@ -79,48 +79,49 @@ int main(int argc, char *argv[])
    int sock = -1, forwardsock = -1;
 #endif

-    if (argc > 1)
+    if(argc > 1)
        server_ip = argv[1];
-    if (argc > 2)
+    if(argc > 2)
        username = argv[2];
-    if (argc > 3)
+    if(argc > 3)
        password = argv[3];
-    if (argc > 4)
+    if(argc > 4)
        remote_listenhost = argv[4];
-    if (argc > 5)
+    if(argc > 5)
        remote_wantport = atoi(argv[5]);
-    if (argc > 6)
+    if(argc > 6)
        local_destip = argv[6];
-    if (argc > 7)
+    if(argc > 7)
        local_destport = atoi(argv[7]);

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

    /* Connect to SSH server */
    sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 #ifdef WIN32
-    if (sock == INVALID_SOCKET) {
+    if(sock == INVALID_SOCKET) {
        fprintf(stderr, "failed to open socket!\n");
        return -1;
    }
 #else
-    if (sock == -1) {
+    if(sock == -1) {
        perror("socket");
        return -1;
    }
 #endif

    sin.sin_family = AF_INET;
-    if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(server_ip))) {
+    sin.sin_addr.s_addr = inet_addr(server_ip);
+    if(INADDR_NONE == sin.sin_addr.s_addr) {
        perror("inet_addr");
        return -1;
    }
    sin.sin_port = htons(22);
-    if (connect(sock, (struct sockaddr*)(&sin),
+    if(connect(sock, (struct sockaddr*)(&sin),
                sizeof(struct sockaddr_in)) != 0) {
        fprintf(stderr, "failed to connect!\n");
        return -1;
@@ -156,32 +157,34 @@ int main(int argc, char *argv[])
    /* check what authentication methods are available */
    userauthlist = libssh2_userauth_list(session, username, strlen(username));
    fprintf(stderr, "Authentication methods: %s\n", userauthlist);
-    if (strstr(userauthlist, "password"))
+    if(strstr(userauthlist, "password"))
        auth |= AUTH_PASSWORD;
-    if (strstr(userauthlist, "publickey"))
+    if(strstr(userauthlist, "publickey"))
        auth |= AUTH_PUBLICKEY;

    /* check for options */
    if(argc > 8) {
-        if ((auth & AUTH_PASSWORD) && !strcasecmp(argv[8], "-p"))
+        if((auth & AUTH_PASSWORD) && !strcasecmp(argv[8], "-p"))
            auth = AUTH_PASSWORD;
-        if ((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[8], "-k"))
+        if((auth & AUTH_PUBLICKEY) && !strcasecmp(argv[8], "-k"))
            auth = AUTH_PUBLICKEY;
    }

-    if (auth & AUTH_PASSWORD) {
-        if (libssh2_userauth_password(session, username, password)) {
+    if(auth & AUTH_PASSWORD) {
+        if(libssh2_userauth_password(session, username, password)) {
            fprintf(stderr, "Authentication by password failed.\n");
            goto shutdown;
        }
-    } else if (auth & AUTH_PUBLICKEY) {
-        if (libssh2_userauth_publickey_fromfile(session, username, keyfile1,
-                                                keyfile2, password)) {
+    }
+    else if(auth & AUTH_PUBLICKEY) {
+        if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
+                                               keyfile2, password)) {
            fprintf(stderr, "\tAuthentication by public key failed!\n");
            goto shutdown;
        }
        fprintf(stderr, "\tAuthentication by public key succeeded.\n");
-    } else {
+    }
+    else {
        fprintf(stderr, "No supported authentication methods found!\n");
        goto shutdown;
    }
@@ -191,7 +194,7 @@ int main(int argc, char *argv[])

    listener = libssh2_channel_forward_listen_ex(session, remote_listenhost,
        remote_wantport, &remote_listenport, 1);
-    if (!listener) {
+    if(!listener) {
        fprintf(stderr, "Could not start the tcpip-forward listener!\n"
                "(Note that this can be a problem at the server!"
                " Please review the server logs.)\n");
@@ -203,7 +206,7 @@ int main(int argc, char *argv[])

    fprintf(stderr, "Waiting for remote connection\n");
    channel = libssh2_channel_forward_accept(listener);
-    if (!channel) {
+    if(!channel) {
        fprintf(stderr, "Could not accept connection!\n"
                "(Note that this can be a problem at the server!"
                " Please review the server logs.)\n");
@@ -215,12 +218,12 @@ int main(int argc, char *argv[])
        local_destip, local_destport);
    forwardsock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 #ifdef WIN32
-    if (forwardsock == INVALID_SOCKET) {
+    if(forwardsock == INVALID_SOCKET) {
        fprintf(stderr, "failed to open forward socket!\n");
        goto shutdown;
    }
 #else
-    if (forwardsock == -1) {
+    if(forwardsock == -1) {
        perror("socket");
        goto shutdown;
    }
@@ -228,11 +231,12 @@ int main(int argc, char *argv[])

    sin.sin_family = AF_INET;
    sin.sin_port = htons(local_destport);
-    if (INADDR_NONE == (sin.sin_addr.s_addr = inet_addr(local_destip))) {
+    sin.sin_addr.s_addr = inet_addr(local_destip);
+    if(INADDR_NONE == sin.sin_addr.s_addr) {
        perror("inet_addr");
        goto shutdown;
    }
-    if (-1 == connect(forwardsock, (struct sockaddr *)&sin, sinlen)) {
+    if(-1 == connect(forwardsock, (struct sockaddr *)&sin, sinlen)) {
        perror("connect");
        goto shutdown;
    }
@@ -243,22 +247,23 @@ int main(int argc, char *argv[])
    /* Must use non-blocking IO hereafter due to the current libssh2 API */
    libssh2_session_set_blocking(session, 0);

-    while (1) {
+    while(1) {
        FD_ZERO(&fds);
        FD_SET(forwardsock, &fds);
        tv.tv_sec = 0;
        tv.tv_usec = 100000;
        rc = select(forwardsock + 1, &fds, NULL, NULL, &tv);
-        if (-1 == rc) {
+        if(-1 == rc) {
            perror("select");
            goto shutdown;
        }
-        if (rc && FD_ISSET(forwardsock, &fds)) {
+        if(rc && FD_ISSET(forwardsock, &fds)) {
            len = recv(forwardsock, buf, sizeof(buf), 0);
-            if (len < 0) {
+            if(len < 0) {
                perror("read");
                goto shutdown;
-            } else if (0 == len) {
+            }
+            else if(0 == len) {
                fprintf(stderr, "The local server at %s:%d disconnected!\n",
                    local_destip, local_destport);
                goto shutdown;
@@ -266,31 +271,31 @@ int main(int argc, char *argv[])
            wr = 0;
            do {
                i = libssh2_channel_write(channel, buf, len);
-                if (i < 0) {
+                if(i < 0) {
                    fprintf(stderr, "libssh2_channel_write: %d\n", i);
                    goto shutdown;
                }
                wr += i;
            } while(i > 0 && wr < len);
        }
-        while (1) {
+        while(1) {
            len = libssh2_channel_read(channel, buf, sizeof(buf));
-            if (LIBSSH2_ERROR_EAGAIN == len)
+            if(LIBSSH2_ERROR_EAGAIN == len)
                break;
-            else if (len < 0) {
+            else if(len < 0) {
                fprintf(stderr, "libssh2_channel_read: %d", (int)len);
                goto shutdown;
            }
            wr = 0;
-            while (wr < len) {
+            while(wr < len) {
                i = send(forwardsock, buf + wr, len - wr, 0);
-                if (i <= 0) {
+                if(i <= 0) {
                    perror("write");
                    goto shutdown;
                }
                wr += i;
            }
-            if (libssh2_channel_eof(channel)) {
+            if(libssh2_channel_eof(channel)) {
                fprintf(stderr, "The remote client at %s:%d disconnected!\n",
                    remote_listenhost, remote_listenport);
                goto shutdown;
@@ -304,9 +309,9 @@ shutdown:
 #else
    close(forwardsock);
 #endif
-    if (channel)
+    if(channel)
        libssh2_channel_free(channel);
-    if (listener)
+    if(listener)
        libssh2_channel_forward_cancel(listener);
    libssh2_session_disconnect(session, "Client disconnecting normally");
    libssh2_session_free(session);
--- a/example/x11.c
+++ b/example/x11.c
@@ -48,14 +48,14 @@ static void remove_node(struct chan_X11_list *elem)

    current_node = gp_x11_chan;

-    if (gp_x11_chan == elem) {
+    if(gp_x11_chan == elem) {
        gp_x11_chan = gp_x11_chan->next;
        free(current_node);
        return;
    }

-    while (current_node->next != NULL) {
-        if (current_node->next == elem) {
+    while(current_node->next != NULL) {
+        if(current_node->next == elem) {
            current_node->next = current_node->next->next;
            current_node = current_node->next;
            free(current_node);
@@ -78,7 +78,7 @@ static int _raw_mode(void)
    struct termios tio;

    rc = tcgetattr(fileno(stdin), &tio);
-    if (rc != -1) {
+    if(rc != -1) {
        _saved_tio = tio;
        /* do the equivalent of cfmakeraw() manually, to build on Solaris */
        tio.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
@@ -106,37 +106,40 @@ static int _normal_mode(void)
 static void x11_callback(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel,
                         char *shost, int sport, void **abstract)
 {
-    const char * display      = NULL;
-    char * ptr          = NULL;
-    char * temp_buff    = NULL;
+    const char *display = NULL;
+    char *ptr          = NULL;
+    char *temp_buff    = NULL;
    int   display_port = 0;
    int   sock         = 0;
    int   rc           = 0;
    struct sockaddr_un addr;
    struct chan_X11_list *new;
    struct chan_X11_list *chan_iter;
-
+    (void)session;
+    (void)shost;
+    (void)sport;
+    (void)abstract;
    /*
     * Connect to the display
     * Inspired by x11_connect_display in openssh
     */
    display = getenv("DISPLAY");
-    if ( display != NULL) {
-        if (strncmp( display, "unix:", 5) == 0 ||
+    if(display != NULL) {
+        if(strncmp(display, "unix:", 5) == 0 ||
            display[0] == ':') {
            /* Connect to the local unix domain */
            ptr = strrchr(display, ':');
-            temp_buff = (char *) calloc(strlen(ptr+1), sizeof(char));
-            if (!temp_buff) {
+            temp_buff = (char *) calloc(strlen(ptr + 1), sizeof(char));
+            if(!temp_buff) {
                perror("calloc");
                return;
            }
-            memcpy(temp_buff, ptr+1, strlen(ptr+1));
+            memcpy(temp_buff, ptr + 1, strlen(ptr + 1));
            display_port = atoi(temp_buff);
            free(temp_buff);

            sock = socket(AF_UNIX, SOCK_STREAM, 0);
-            if (sock < 0)
+            if(sock < 0)
                return;
            memset(&addr, 0, sizeof(addr));
            addr.sun_family = AF_UNIX;
@@ -144,9 +147,9 @@ static void x11_callback(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel,
                     _PATH_UNIX_X, display_port);
            rc = connect(sock, (struct sockaddr *) &addr, sizeof(addr));

-            if (rc != -1){
+            if(rc != -1) {
                /* Connection Successfull */
-                if (gp_x11_chan == NULL) {
+                if(gp_x11_chan == NULL) {
                    /* Calloc ensure that gp_X11_chan is full of 0 */
                    gp_x11_chan = (struct chan_X11_list *)
                        calloc(1, sizeof(struct chan_X11_list));
@@ -156,7 +159,7 @@ static void x11_callback(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel,
                }
                else {
                    chan_iter = gp_x11_chan;
-                    while (chan_iter->next != NULL)
+                    while(chan_iter->next != NULL)
                        chan_iter = chan_iter->next;
                    /* Create the new Node */
                    new = (struct chan_X11_list *)
@@ -180,10 +183,10 @@ static void x11_callback(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel,
 */
 static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)
 {
-    char * buf          = NULL;
-    int    bufsize      = 8192;
-    int    rc           = 0;
-    int    nfds         = 1;
+    char *buf          = NULL;
+    int   bufsize      = 8192;
+    int   rc           = 0;
+    int   nfds         = 1;
    LIBSSH2_POLLFD  *fds      = NULL;
    fd_set set;
    struct timeval timeval_out;
@@ -192,12 +195,14 @@ static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)


    FD_ZERO(&set);
-    FD_SET(sock,&set);
+    FD_SET(sock, &set);

-    if ((buf = calloc (bufsize, sizeof(char))) == NULL)
+    buf = calloc(bufsize, sizeof(char));
+    if(!buf)
        return 0;

-    if ((fds = malloc (sizeof (LIBSSH2_POLLFD))) == NULL) {
+    fds = malloc(sizeof (LIBSSH2_POLLFD));
+    if(!fds) {
        free(buf);
        return 0;
    }
@@ -208,18 +213,18 @@ static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)
    fds[0].revents = LIBSSH2_POLLFD_POLLIN;

    rc = libssh2_poll(fds, nfds, 0);
-    if (rc >0) {
+    if(rc >0) {
        rc = libssh2_channel_read(channel, buf, bufsize);
        write(sock, buf, rc);
    }

-    rc = select(sock+1, &set, NULL, NULL, &timeval_out);
-    if (rc > 0) {
+    rc = select(sock + 1, &set, NULL, NULL, &timeval_out);
+    if(rc > 0) {
        memset((void *)buf, 0, bufsize);

        /* Data in sock*/
        rc = read(sock, buf, bufsize);
-        if (rc > 0) {
+        if(rc > 0) {
            libssh2_channel_write(channel, buf, rc);
        }
        else {
@@ -230,7 +235,7 @@ static int x11_send_receive(LIBSSH2_CHANNEL *channel, int sock)

    free(fds);
    free(buf);
-    if (libssh2_channel_eof(channel) == 1) {
+    if(libssh2_channel_eof(channel) == 1) {
        return -1;
    }
    return 0;
@@ -270,10 +275,10 @@ main (int argc, char *argv[])
    timeval_out.tv_usec = 10;


-    if (argc > 3) {
-      hostaddr = inet_addr(argv[1]);
-      username = argv[2];
-      password = argv[3];
+    if(argc > 3) {
+        hostaddr = inet_addr(argv[1]);
+        username = argv[2];
+        password = argv[3];
    }
    else {
        fprintf(stderr, "Usage: %s destination username password",
@@ -281,51 +286,55 @@ main (int argc, char *argv[])
        return -1;
    }

-    if (argc > 4) {
+    if(argc > 4) {
        set_debug_on = 1;
-        fprintf (stderr, "DEBUG is ON: %d\n", set_debug_on);
+        fprintf(stderr, "DEBUG is ON: %d\n", set_debug_on);
    }

-    rc = libssh2_init (0);
-    if (rc != 0) {
-        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
+    rc = libssh2_init(0);
+    if(rc != 0) {
+        fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
        return 1;
    }

-    sock = socket (AF_INET, SOCK_STREAM, 0);
-    if (sock == -1) {
+    sock = socket(AF_INET, SOCK_STREAM, 0);
+    if(sock == -1) {
        perror("socket");
        return -1;
    }

    sin.sin_family = AF_INET;
-    sin.sin_port = htons (22);
+    sin.sin_port = htons(22);
    sin.sin_addr.s_addr = hostaddr;

    rc = connect(sock, (struct sockaddr *) &sin,
                 sizeof(struct sockaddr_in));
-    if (rc != 0) {
-        fprintf (stderr, "Failed to established connection!\n");
+    if(rc != 0) {
+        fprintf(stderr, "Failed to established connection!\n");
        return -1;
    }
    /* Open a session */
    session = libssh2_session_init();
    rc      = libssh2_session_handshake(session, sock);
-    if (rc != 0) {
+    if(rc != 0) {
        fprintf(stderr, "Failed Start the SSH session\n");
        return -1;
    }

-    if (set_debug_on == 1)
+    if(set_debug_on == 1)
        libssh2_trace(session, LIBSSH2_TRACE_CONN);

+    /* ignore pedantic warnings by gcc on the callback argument */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
    /* Set X11 Callback */
    libssh2_session_callback_set(session, LIBSSH2_CALLBACK_X11,
                                 (void *)x11_callback);
+#pragma GCC diagnostic pop

    /* Authenticate via password */
    rc = libssh2_userauth_password(session, username, password);
-    if (rc != 0) {
+    if(rc != 0) {
        fprintf(stderr, "Failed to authenticate\n");
        session_shutdown(session);
        close(sock);
@@ -334,7 +343,7 @@ main (int argc, char *argv[])

    /* Open a channel */
    channel  = libssh2_channel_open_session(session);
-    if ( channel == NULL ) {
+    if(channel == NULL) {
        fprintf(stderr, "Failed to open a new channel\n");
        session_shutdown(session);
        close(sock);
@@ -343,8 +352,8 @@ main (int argc, char *argv[])


    /* Request a PTY */
-    rc = libssh2_channel_request_pty( channel, "xterm");
-    if (rc != 0) {
+    rc = libssh2_channel_request_pty(channel, "xterm");
+    if(rc != 0) {
        fprintf(stderr, "Failed to request a pty\n");
        session_shutdown(session);
        close(sock);
@@ -352,8 +361,8 @@ main (int argc, char *argv[])
    }

    /* Request X11 */
-    rc = libssh2_channel_x11_req(channel,0);
-    if(rc!=0) {
+    rc = libssh2_channel_x11_req(channel, 0);
+    if(rc != 0) {
        fprintf(stderr, "Failed to request X11 forwarding\n");
        session_shutdown(session);
        close(sock);
@@ -362,7 +371,7 @@ main (int argc, char *argv[])

    /* Request a shell */
    rc = libssh2_channel_shell(channel);
-    if (rc!=0) {
+    if(rc != 0) {
        fprintf(stderr, "Failed to open a shell\n");
        session_shutdown(session);
        close(sock);
@@ -370,7 +379,7 @@ main (int argc, char *argv[])
    }

    rc = _raw_mode();
-    if (rc != 0) {
+    if(rc != 0) {
        fprintf(stderr, "Failed to entered in raw mode\n");
        session_shutdown(session);
        close(sock);
@@ -380,15 +389,15 @@ main (int argc, char *argv[])
    memset(&w_size, 0, sizeof(struct winsize));
    memset(&w_size_bck, 0, sizeof(struct winsize));

-    while (1) {
+    while(1) {

        FD_ZERO(&set);
-        FD_SET(fileno(stdin),&set);
+        FD_SET(fileno(stdin), &set);

        /* Search if a resize pty has to be send */
        ioctl(fileno(stdin), TIOCGWINSZ, &w_size);
-        if ((w_size.ws_row != w_size_bck.ws_row) ||
-            (w_size.ws_col != w_size_bck.ws_col))   {
+        if((w_size.ws_row != w_size_bck.ws_row) ||
+           (w_size.ws_col != w_size_bck.ws_col)) {
            w_size_bck = w_size;

            libssh2_channel_request_pty_size(channel,
@@ -396,10 +405,12 @@ main (int argc, char *argv[])
                                             w_size.ws_row);
        }

-        if ((buf = calloc (bufsiz, sizeof(char))) == NULL)
+        buf = calloc(bufsiz, sizeof(char));
+        if(buf == NULL)
            break;

-        if ((fds = malloc (sizeof (LIBSSH2_POLLFD))) == NULL) {
+        fds = malloc(sizeof (LIBSSH2_POLLFD));
+        if(fds == NULL) {
            free(buf);
            break;
        }
@@ -410,25 +421,25 @@ main (int argc, char *argv[])
        fds[0].revents = LIBSSH2_POLLFD_POLLIN;

        rc = libssh2_poll(fds, nfds, 0);
-        if (rc >0) {
+        if(rc >0) {
            libssh2_channel_read(channel, buf, sizeof(buf));
            fprintf(stdout, "%s", buf);
            fflush(stdout);
        }

        /* Looping on X clients */
-        if (gp_x11_chan != NULL) {
+        if(gp_x11_chan != NULL) {
            current_node = gp_x11_chan;
        }
        else
            current_node = NULL;

-        while (current_node != NULL) {
+        while(current_node != NULL) {
            struct chan_X11_list *next_node;
            rc = x11_send_receive(current_node->chan, current_node->sock);
            next_node = current_node->next;
-            if (rc == -1){
-                shutdown(current_node->sock,SHUT_RDWR);
+            if(rc == -1) {
+                shutdown(current_node->sock, SHUT_RDWR);
                close(current_node->sock);
                remove_node(current_node);
            }
@@ -437,25 +448,25 @@ main (int argc, char *argv[])
        }


-        rc = select(fileno(stdin)+1,&set,NULL,NULL,&timeval_out);
-        if (rc > 0) {
+        rc = select(fileno(stdin) + 1, &set, NULL, NULL, &timeval_out);
+        if(rc > 0) {
            /* Data in stdin*/
-            rc = read(fileno(stdin), buf,1);
-            if (rc > 0)
-                libssh2_channel_write(channel,buf, sizeof(buf));
+            rc = read(fileno(stdin), buf, 1);
+            if(rc > 0)
+                libssh2_channel_write(channel, buf, sizeof(buf));
        }

-        free (fds);
-        free (buf);
+        free(fds);
+        free(buf);

-        if (libssh2_channel_eof (channel) == 1) {
-          break;
+        if(libssh2_channel_eof (channel) == 1) {
+            break;
        }
    }

-    if (channel) {
-      libssh2_channel_free (channel);
-      channel = NULL;
+    if(channel) {
+        libssh2_channel_free(channel);
+        channel = NULL;
    }
    _normal_mode();

--- a/include/libssh2.h
+++ b/include/libssh2.h
@@ -40,18 +40,18 @@
 #ifndef LIBSSH2_H
 #define LIBSSH2_H 1

-#define LIBSSH2_COPYRIGHT "2004-2015 The libssh2 project and its contributors."
+#define LIBSSH2_COPYRIGHT "2004-2019 The libssh2 project and its contributors."

 /* We use underscore instead of dash when appending DEV in dev versions just
   to make the BANNER define (used by src/session.c) be a valid SSH
   banner. Release versions have no appended strings and may of course not
   have dashes either. */
-#define LIBSSH2_VERSION "1.6.0"
+#define LIBSSH2_VERSION "1.10.0"

 /* The numeric version number is also available "in parts" by using these
   defines: */
 #define LIBSSH2_VERSION_MAJOR 1
-#define LIBSSH2_VERSION_MINOR 6
+#define LIBSSH2_VERSION_MINOR 10
 #define LIBSSH2_VERSION_PATCH 0

 /* This is the numeric version of the libssh2 version number, meant for easier
@@ -69,7 +69,7 @@
   and it is always a greater number in a more recent release. It makes
   comparisons with greater than and less than work.
 */
-#define LIBSSH2_VERSION_NUM 0x010600
+#define LIBSSH2_VERSION_NUM 0x010a00

 /*
 * This is the date and time when the full source package was created. The
@@ -80,7 +80,7 @@
 *
 * "Mon Feb 12 11:35:33 UTC 2007"
 */
-#define LIBSSH2_TIMESTAMP "Fri Jun 12 06:58:26 UTC 2015"
+#define LIBSSH2_TIMESTAMP "Sun 29 Aug 2021 08:37:50 PM UTC"

 #ifndef RC_INVOKED

@@ -121,18 +121,28 @@ extern "C" {
 #if (defined(NETWARE) && !defined(__NOVELL_LIBC__))
 # include <sys/bsdskt.h>
 typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
 typedef unsigned int uint32_t;
+typedef int int32_t;
+typedef unsigned long long uint64_t;
+typedef long long int64_t;
 #endif

 #ifdef _MSC_VER
 typedef unsigned char uint8_t;
+typedef unsigned short int uint16_t;
 typedef unsigned int uint32_t;
+typedef __int32 int32_t;
+typedef __int64 int64_t;
+typedef unsigned __int64 uint64_t;
 typedef unsigned __int64 libssh2_uint64_t;
 typedef __int64 libssh2_int64_t;
-#ifndef ssize_t
+#if (!defined(HAVE_SSIZE_T) && !defined(ssize_t))
 typedef SSIZE_T ssize_t;
+#define HAVE_SSIZE_T
 #endif
 #else
+#include <stdint.h>
 typedef unsigned long long libssh2_uint64_t;
 typedef long long libssh2_int64_t;
 #endif
@@ -145,17 +155,91 @@ typedef int libssh2_socket_t;
 #define LIBSSH2_INVALID_SOCKET -1
 #endif /* WIN32 */

+/*
+ * Determine whether there is small or large file support on windows.
+ */
+
+#if defined(_MSC_VER) && !defined(_WIN32_WCE)
+#  if (_MSC_VER >= 900) && (_INTEGRAL_MAX_BITS >= 64)
+#    define LIBSSH2_USE_WIN32_LARGE_FILES
+#  else
+#    define LIBSSH2_USE_WIN32_SMALL_FILES
+#  endif
+#endif
+
+#if defined(__MINGW32__) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES)
+#  define LIBSSH2_USE_WIN32_LARGE_FILES
+#endif
+
+#if defined(__WATCOMC__) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES)
+#  define LIBSSH2_USE_WIN32_LARGE_FILES
+#endif
+
+#if defined(__POCC__)
+#  undef LIBSSH2_USE_WIN32_LARGE_FILES
+#endif
+
+#if defined(_WIN32) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES) && \
+    !defined(LIBSSH2_USE_WIN32_SMALL_FILES)
+#  define LIBSSH2_USE_WIN32_SMALL_FILES
+#endif
+
+/*
+ * Large file (>2Gb) support using WIN32 functions.
+ */
+
+#ifdef LIBSSH2_USE_WIN32_LARGE_FILES
+#  include <io.h>
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  define LIBSSH2_STRUCT_STAT_SIZE_FORMAT    "%I64d"
+typedef struct _stati64 libssh2_struct_stat;
+typedef __int64 libssh2_struct_stat_size;
+#endif
+
+/*
+ * Small file (<2Gb) support using WIN32 functions.
+ */
+
+#ifdef LIBSSH2_USE_WIN32_SMALL_FILES
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  ifndef _WIN32_WCE
+#    define LIBSSH2_STRUCT_STAT_SIZE_FORMAT    "%d"
+typedef struct _stat libssh2_struct_stat;
+typedef off_t libssh2_struct_stat_size;
+#  endif
+#endif
+
+#ifndef LIBSSH2_STRUCT_STAT_SIZE_FORMAT
+#  ifdef __VMS
+/* We have to roll our own format here because %z is a C99-ism we don't
+   have. */
+#    if __USE_OFF64_T || __USING_STD_STAT
+#      define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%Ld"
+#    else
+#      define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%d"
+#    endif
+#  else
+#    define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%zd"
+#  endif
+typedef struct stat libssh2_struct_stat;
+typedef off_t libssh2_struct_stat_size;
+#endif
+
 /* Part of every banner, user specified or not */
 #define LIBSSH2_SSH_BANNER                  "SSH-2.0-libssh2_" LIBSSH2_VERSION

-/* We *could* add a comment here if we so chose */
-#define LIBSSH2_SSH_DEFAULT_BANNER                  LIBSSH2_SSH_BANNER
-#define LIBSSH2_SSH_DEFAULT_BANNER_WITH_CRLF        LIBSSH2_SSH_DEFAULT_BANNER "\r\n"
+#define LIBSSH2_SSH_DEFAULT_BANNER            LIBSSH2_SSH_BANNER
+#define LIBSSH2_SSH_DEFAULT_BANNER_WITH_CRLF  LIBSSH2_SSH_DEFAULT_BANNER "\r\n"

-/* Default generate and safe prime sizes for diffie-hellman-group-exchange-sha1 */
-#define LIBSSH2_DH_GEX_MINGROUP     1024
-#define LIBSSH2_DH_GEX_OPTGROUP     1536
-#define LIBSSH2_DH_GEX_MAXGROUP     2048
+/* Default generate and safe prime sizes for
+   diffie-hellman-group-exchange-sha1 */
+#define LIBSSH2_DH_GEX_MINGROUP     2048
+#define LIBSSH2_DH_GEX_OPTGROUP     4096
+#define LIBSSH2_DH_GEX_MAXGROUP     8192
+
+#define LIBSSH2_DH_MAX_MODULUS_BITS 16384

 /* Defaults for pty requests */
 #define LIBSSH2_TERM_WIDTH      80
@@ -188,14 +272,14 @@ typedef int libssh2_socket_t;

 typedef struct _LIBSSH2_USERAUTH_KBDINT_PROMPT
 {
-    char* text;
+    char *text;
    unsigned int length;
    unsigned char echo;
 } LIBSSH2_USERAUTH_KBDINT_PROMPT;

 typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
 {
-    char* text;
+    char *text;
    unsigned int length;
 } LIBSSH2_USERAUTH_KBDINT_RESPONSE;

@@ -206,10 +290,10 @@ typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE

 /* 'keyboard-interactive' authentication callback */
 #define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) \
- void name_(const char* name, int name_len, const char* instruction, \
+ void name_(const char *name, int name_len, const char *instruction, \
            int instruction_len, int num_prompts, \
-            const LIBSSH2_USERAUTH_KBDINT_PROMPT* prompts, \
-            LIBSSH2_USERAUTH_KBDINT_RESPONSE* responses, void **abstract)
+            const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,              \
+            LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses, void **abstract)

 /* Callbacks for special SSH packets */
 #define LIBSSH2_IGNORE_FUNC(name) \
@@ -243,12 +327,14 @@ typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
            LIBSSH2_CHANNEL *channel, void **channel_abstract)

 /* I/O callbacks */
-#define LIBSSH2_RECV_FUNC(name)  ssize_t name(libssh2_socket_t socket, \
-                                              void *buffer, size_t length, \
-                                              int flags, void **abstract)
-#define LIBSSH2_SEND_FUNC(name)  ssize_t name(libssh2_socket_t socket, \
-                                              const void *buffer, size_t length,\
-                                              int flags, void **abstract)
+#define LIBSSH2_RECV_FUNC(name)                                         \
+    ssize_t name(libssh2_socket_t socket,                               \
+                 void *buffer, size_t length,                           \
+                 int flags, void **abstract)
+#define LIBSSH2_SEND_FUNC(name)                                         \
+    ssize_t name(libssh2_socket_t socket,                               \
+                 const void *buffer, size_t length,                     \
+                 int flags, void **abstract)

 /* libssh2_session_callback_set() constants */
 #define LIBSSH2_CALLBACK_IGNORE             0
@@ -332,11 +418,16 @@ typedef struct _LIBSSH2_POLLFD {
 /* Hash Types */
 #define LIBSSH2_HOSTKEY_HASH_MD5                            1
 #define LIBSSH2_HOSTKEY_HASH_SHA1                           2
+#define LIBSSH2_HOSTKEY_HASH_SHA256                         3

 /* Hostkey Types */
-#define LIBSSH2_HOSTKEY_TYPE_UNKNOWN			    0
-#define LIBSSH2_HOSTKEY_TYPE_RSA			    1
-#define LIBSSH2_HOSTKEY_TYPE_DSS			    2
+#define LIBSSH2_HOSTKEY_TYPE_UNKNOWN            0
+#define LIBSSH2_HOSTKEY_TYPE_RSA                1
+#define LIBSSH2_HOSTKEY_TYPE_DSS                2
+#define LIBSSH2_HOSTKEY_TYPE_ECDSA_256          3
+#define LIBSSH2_HOSTKEY_TYPE_ECDSA_384          4
+#define LIBSSH2_HOSTKEY_TYPE_ECDSA_521          5
+#define LIBSSH2_HOSTKEY_TYPE_ED25519            6

 /* Disconnect Codes (defined by SSH protocol) */
 #define SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT          1
@@ -382,7 +473,8 @@ typedef struct _LIBSSH2_POLLFD {
 #define LIBSSH2_ERROR_FILE                      -16
 #define LIBSSH2_ERROR_METHOD_NONE               -17
 #define LIBSSH2_ERROR_AUTHENTICATION_FAILED     -18
-#define LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED    LIBSSH2_ERROR_AUTHENTICATION_FAILED
+#define LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED    \
+    LIBSSH2_ERROR_AUTHENTICATION_FAILED
 #define LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED      -19
 #define LIBSSH2_ERROR_CHANNEL_OUTOFORDER        -20
 #define LIBSSH2_ERROR_CHANNEL_FAILURE           -21
@@ -411,6 +503,9 @@ typedef struct _LIBSSH2_POLLFD {
 #define LIBSSH2_ERROR_ENCRYPT                   -44
 #define LIBSSH2_ERROR_BAD_SOCKET                -45
 #define LIBSSH2_ERROR_KNOWN_HOSTS               -46
+#define LIBSSH2_ERROR_CHANNEL_WINDOW_FULL       -47
+#define LIBSSH2_ERROR_KEYFILE_AUTH_FAILED       -48
+#define LIBSSH2_ERROR_RANDGEN                   -49

 /* this is a define to provide the old (<= 1.2.7) name */
 #define LIBSSH2_ERROR_BANNER_NONE LIBSSH2_ERROR_BANNER_RECV
@@ -453,14 +548,14 @@ LIBSSH2_API void libssh2_free(LIBSSH2_SESSION *session, void *ptr);
 *
 * Fills algs with a list of supported acryptographic algorithms. Returns a
 * non-negative number (number of supported algorithms) on success or a
- * negative number (an eror code) on failure.
+ * negative number (an error code) on failure.
 *
 * NOTE: on success, algs must be deallocated (by calling libssh2_free) when
 * not needed anymore
 */
 LIBSSH2_API int libssh2_session_supported_algs(LIBSSH2_SESSION* session,
                                               int method_type,
-                                               const char*** algs);
+                                               const char ***algs);

 /* Session API */
 LIBSSH2_API LIBSSH2_SESSION *
@@ -506,6 +601,9 @@ LIBSSH2_API int libssh2_session_last_error(LIBSSH2_SESSION *session,
                                           char **errmsg,
                                           int *errmsg_len, int want_buf);
 LIBSSH2_API int libssh2_session_last_errno(LIBSSH2_SESSION *session);
+LIBSSH2_API int libssh2_session_set_last_error(LIBSSH2_SESSION* session,
+                                               int errcode,
+                                               const char *errmsg);
 LIBSSH2_API int libssh2_session_block_directions(LIBSSH2_SESSION *session);

 LIBSSH2_API int libssh2_session_flag(LIBSSH2_SESSION *session, int flag,
@@ -518,12 +616,14 @@ LIBSSH2_API char *libssh2_userauth_list(LIBSSH2_SESSION *session,
                                        unsigned int username_len);
 LIBSSH2_API int libssh2_userauth_authenticated(LIBSSH2_SESSION *session);

-LIBSSH2_API int libssh2_userauth_password_ex(LIBSSH2_SESSION *session,
-                                             const char *username,
-                                             unsigned int username_len,
-                                             const char *password,
-                                             unsigned int password_len,
-                                             LIBSSH2_PASSWD_CHANGEREQ_FUNC((*passwd_change_cb)));
+LIBSSH2_API int
+libssh2_userauth_password_ex(LIBSSH2_SESSION *session,
+                             const char *username,
+                             unsigned int username_len,
+                             const char *password,
+                             unsigned int password_len,
+                             LIBSSH2_PASSWD_CHANGEREQ_FUNC
+                             ((*passwd_change_cb)));

 #define libssh2_userauth_password(session, username, password) \
 libssh2_userauth_password_ex((session), (username),           \
@@ -550,7 +650,8 @@ libssh2_userauth_publickey(LIBSSH2_SESSION *session,
                           const char *username,
                           const unsigned char *pubkeydata,
                           size_t pubkeydata_len,
-                           LIBSSH2_USERAUTH_PUBLICKEY_SIGN_FUNC((*sign_callback)),
+                           LIBSSH2_USERAUTH_PUBLICKEY_SIGN_FUNC
+                           ((*sign_callback)),
                           void **abstract);

 LIBSSH2_API int
@@ -590,13 +691,14 @@ libssh2_userauth_publickey_frommemory(LIBSSH2_SESSION *session,
 * response_callback is provided with filled by library prompts array,
 * but client must allocate and fill individual responses. Responses
 * array is already allocated. Responses data will be freed by libssh2
- * after callback return, but before subsequent callback invokation.
+ * after callback return, but before subsequent callback invocation.
 */
 LIBSSH2_API int
 libssh2_userauth_keyboard_interactive_ex(LIBSSH2_SESSION* session,
                                         const char *username,
                                         unsigned int username_len,
-                                         LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC((*response_callback)));
+                                         LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(
+                                                       (*response_callback)));

 #define libssh2_userauth_keyboard_interactive(session, username,        \
                                              response_callback)        \
@@ -619,7 +721,7 @@ LIBSSH2_API int libssh2_poll(LIBSSH2_POLLFD *fds, unsigned int nfds,

 #define SSH_EXTENDED_DATA_STDERR 1

-/* Returned by any function that would block during a read/write opperation */
+/* Returned by any function that would block during a read/write operation */
 #define LIBSSH2CHANNEL_EAGAIN LIBSSH2_ERROR_EAGAIN

 LIBSSH2_API LIBSSH2_CHANNEL *
@@ -641,7 +743,8 @@ libssh2_channel_direct_tcpip_ex(LIBSSH2_SESSION *session, const char *host,

 LIBSSH2_API LIBSSH2_LISTENER *
 libssh2_channel_forward_listen_ex(LIBSSH2_SESSION *session, const char *host,
-                                  int port, int *bound_port, int queue_maxsize);
+                                  int port, int *bound_port,
+                                  int queue_maxsize);
 #define libssh2_channel_forward_listen(session, port) \
 libssh2_channel_forward_listen_ex((session), NULL, (port), NULL, 16)

@@ -661,6 +764,8 @@ LIBSSH2_API int libssh2_channel_setenv_ex(LIBSSH2_CHANNEL *channel,
                              (unsigned int)strlen(varname), (value),   \
                              (unsigned int)strlen(value))

+LIBSSH2_API int libssh2_channel_request_auth_agent(LIBSSH2_CHANNEL *channel);
+
 LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel,
                                               const char *term,
                                               unsigned int term_len,
@@ -672,15 +777,17 @@ LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel,
    libssh2_channel_request_pty_ex((channel), (term),                   \
                                   (unsigned int)strlen(term),          \
                                   NULL, 0,                             \
-                                   LIBSSH2_TERM_WIDTH, LIBSSH2_TERM_HEIGHT, \
-                                   LIBSSH2_TERM_WIDTH_PX, LIBSSH2_TERM_HEIGHT_PX)
+                                   LIBSSH2_TERM_WIDTH,                  \
+                                   LIBSSH2_TERM_HEIGHT,                 \
+                                   LIBSSH2_TERM_WIDTH_PX,               \
+                                   LIBSSH2_TERM_HEIGHT_PX)

 LIBSSH2_API int libssh2_channel_request_pty_size_ex(LIBSSH2_CHANNEL *channel,
                                                    int width, int height,
                                                    int width_px,
                                                    int height_px);
 #define libssh2_channel_request_pty_size(channel, width, height) \
-  libssh2_channel_request_pty_size_ex( (channel), (width), (height), 0, 0)
+  libssh2_channel_request_pty_size_ex((channel), (width), (height), 0, 0)

 LIBSSH2_API int libssh2_channel_x11_req_ex(LIBSSH2_CHANNEL *channel,
                                           int single_connection,
@@ -742,8 +849,9 @@ LIBSSH2_API ssize_t libssh2_channel_write_ex(LIBSSH2_CHANNEL *channel,

 #define libssh2_channel_write(channel, buf, buflen) \
  libssh2_channel_write_ex((channel), 0, (buf), (buflen))
-#define libssh2_channel_write_stderr(channel, buf, buflen)  \
-  libssh2_channel_write_ex((channel), SSH_EXTENDED_DATA_STDERR, (buf), (buflen))
+#define libssh2_channel_write_stderr(channel, buf, buflen)              \
+    libssh2_channel_write_ex((channel), SSH_EXTENDED_DATA_STDERR,       \
+                             (buf), (buflen))

 LIBSSH2_API unsigned long
 libssh2_channel_window_write_ex(LIBSSH2_CHANNEL *channel,
@@ -780,7 +888,7 @@ LIBSSH2_API int libssh2_channel_handle_extended_data2(LIBSSH2_CHANNEL *channel,
  libssh2_channel_handle_extended_data((channel),                       \
                                       (ignore) ?                       \
                                       LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE : \
-                                       LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL )
+                                       LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL)

 #define LIBSSH2_CHANNEL_FLUSH_EXTENDED_DATA     -1
 #define LIBSSH2_CHANNEL_FLUSH_ALL               -2
@@ -805,9 +913,14 @@ LIBSSH2_API int libssh2_channel_close(LIBSSH2_CHANNEL *channel);
 LIBSSH2_API int libssh2_channel_wait_closed(LIBSSH2_CHANNEL *channel);
 LIBSSH2_API int libssh2_channel_free(LIBSSH2_CHANNEL *channel);

+/* libssh2_scp_recv is DEPRECATED, do not use! */
 LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv(LIBSSH2_SESSION *session,
                                              const char *path,
                                              struct stat *sb);
+/* Use libssh2_scp_recv2 for large (> 2GB) file support on windows */
+LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv2(LIBSSH2_SESSION *session,
+                                               const char *path,
+                                               libssh2_struct_stat *sb);
 LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_send_ex(LIBSSH2_SESSION *session,
                                                 const char *path, int mode,
                                                 size_t size, long mtime,
@@ -879,13 +992,17 @@ libssh2_knownhost_init(LIBSSH2_SESSION *session);
 #define LIBSSH2_KNOWNHOST_KEYENC_RAW      (1<<16)
 #define LIBSSH2_KNOWNHOST_KEYENC_BASE64   (2<<16)

-/* type of key (2 bits) */
-#define LIBSSH2_KNOWNHOST_KEY_MASK     (7<<18)
-#define LIBSSH2_KNOWNHOST_KEY_SHIFT    18
-#define LIBSSH2_KNOWNHOST_KEY_RSA1     (1<<18)
-#define LIBSSH2_KNOWNHOST_KEY_SSHRSA   (2<<18)
-#define LIBSSH2_KNOWNHOST_KEY_SSHDSS   (3<<18)
-#define LIBSSH2_KNOWNHOST_KEY_UNKNOWN  (7<<18)
+/* type of key (4 bits) */
+#define LIBSSH2_KNOWNHOST_KEY_MASK         (15<<18)
+#define LIBSSH2_KNOWNHOST_KEY_SHIFT        18
+#define LIBSSH2_KNOWNHOST_KEY_RSA1         (1<<18)
+#define LIBSSH2_KNOWNHOST_KEY_SSHRSA       (2<<18)
+#define LIBSSH2_KNOWNHOST_KEY_SSHDSS       (3<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ECDSA_256    (4<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ECDSA_384    (5<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ECDSA_521    (6<<18)
+#define LIBSSH2_KNOWNHOST_KEY_ED25519      (7<<18)
+#define LIBSSH2_KNOWNHOST_KEY_UNKNOWN      (15<<18)

 LIBSSH2_API int
 libssh2_knownhost_add(LIBSSH2_KNOWNHOSTS *hosts,
@@ -1053,7 +1170,7 @@ libssh2_knownhost_writefile(LIBSSH2_KNOWNHOSTS *hosts,
 * libssh2_knownhost_get()
 *
 * Traverse the internal list of known hosts. Pass NULL to 'prev' to get
- * the first one. Or pass a poiner to the previously returned one to get the
+ * the first one. Or pass a pointer to the previously returned one to get the
 * next.
 *
 * Returns:
@@ -1109,7 +1226,7 @@ libssh2_agent_list_identities(LIBSSH2_AGENT *agent);
 * libssh2_agent_get_identity()
 *
 * Traverse the internal list of public keys. Pass NULL to 'prev' to get
- * the first one. Or pass a poiner to the previously returned one to get the
+ * the first one. Or pass a pointer to the previously returned one to get the
 * next.
 *
 * Returns:
@@ -1153,6 +1270,24 @@ libssh2_agent_disconnect(LIBSSH2_AGENT *agent);
 LIBSSH2_API void
 libssh2_agent_free(LIBSSH2_AGENT *agent);

+/*
+ * libssh2_agent_set_identity_path()
+ *
+ * Allows a custom agent identity socket path beyond SSH_AUTH_SOCK env
+ *
+ */
+LIBSSH2_API void
+libssh2_agent_set_identity_path(LIBSSH2_AGENT *agent,
+                                const char *path);
+
+/*
+ * libssh2_agent_get_identity_path()
+ *
+ * Returns the custom agent identity socket path if set
+ *
+ */
+LIBSSH2_API const char *
+libssh2_agent_get_identity_path(LIBSSH2_AGENT *agent);

 /*
 * libssh2_keepalive_config()
@@ -1167,9 +1302,9 @@ libssh2_agent_free(LIBSSH2_AGENT *agent);
 * Note that non-blocking applications are responsible for sending the
 * keepalive messages using libssh2_keepalive_send().
 */
-LIBSSH2_API void libssh2_keepalive_config (LIBSSH2_SESSION *session,
-                                           int want_reply,
-                                           unsigned interval);
+LIBSSH2_API void libssh2_keepalive_config(LIBSSH2_SESSION *session,
+                                          int want_reply,
+                                          unsigned interval);

 /*
 * libssh2_keepalive_send()
@@ -1179,8 +1314,8 @@ LIBSSH2_API void libssh2_keepalive_config (LIBSSH2_SESSION *session,
 * it again.  Returns 0 on success, or LIBSSH2_ERROR_SOCKET_SEND on
 * I/O errors.
 */
-LIBSSH2_API int libssh2_keepalive_send (LIBSSH2_SESSION *session,
-                                        int *seconds_to_next);
+LIBSSH2_API int libssh2_keepalive_send(LIBSSH2_SESSION *session,
+                                       int *seconds_to_next);

 /* NOTE NOTE NOTE
   libssh2_trace() has no function in builds that aren't built with debug
@@ -1198,11 +1333,11 @@ LIBSSH2_API int libssh2_trace(LIBSSH2_SESSION *session, int bitmask);
 #define LIBSSH2_TRACE_SOCKET (1<<9)

 typedef void (*libssh2_trace_handler_func)(LIBSSH2_SESSION*,
-                                           void*,
+                                           void *,
                                           const char *,
                                           size_t);
 LIBSSH2_API int libssh2_trace_sethandler(LIBSSH2_SESSION *session,
-                                         void* context,
+                                         void *context,
                                         libssh2_trace_handler_func callback);

 #ifdef __cplusplus
--- a/include/libssh2_publickey.h
+++ b/include/libssh2_publickey.h
@@ -69,7 +69,8 @@ typedef struct _libssh2_publickey_list {
    libssh2_publickey_attribute *attrs; /* free me */
 } libssh2_publickey_list;

-/* Generally use the first macro here, but if both name and value are string literals, you can use _fast() to take advantage of preprocessing */
+/* Generally use the first macro here, but if both name and value are string
+   literals, you can use _fast() to take advantage of preprocessing */
 #define libssh2_publickey_attribute(name, value, mandatory) \
  { (name), strlen(name), (value), strlen(value), (mandatory) },
 #define libssh2_publickey_attribute_fast(name, value, mandatory) \
@@ -80,16 +81,18 @@ extern "C" {
 #endif

 /* Publickey Subsystem */
-LIBSSH2_API LIBSSH2_PUBLICKEY *libssh2_publickey_init(LIBSSH2_SESSION *session);
+LIBSSH2_API LIBSSH2_PUBLICKEY *
+libssh2_publickey_init(LIBSSH2_SESSION *session);

-LIBSSH2_API int libssh2_publickey_add_ex(LIBSSH2_PUBLICKEY *pkey,
-                                         const unsigned char *name,
-                                         unsigned long name_len,
-                                         const unsigned char *blob,
-                                         unsigned long blob_len, char overwrite,
-                                         unsigned long num_attrs,
-                                         const libssh2_publickey_attribute attrs[]);
-#define libssh2_publickey_add(pkey, name, blob, blob_len, overwrite, \
+LIBSSH2_API int
+libssh2_publickey_add_ex(LIBSSH2_PUBLICKEY *pkey,
+                         const unsigned char *name,
+                         unsigned long name_len,
+                         const unsigned char *blob,
+                         unsigned long blob_len, char overwrite,
+                         unsigned long num_attrs,
+                         const libssh2_publickey_attribute attrs[]);
+#define libssh2_publickey_add(pkey, name, blob, blob_len, overwrite,    \
                              num_attrs, attrs)                         \
  libssh2_publickey_add_ex((pkey), (name), strlen(name), (blob), (blob_len), \
                           (overwrite), (num_attrs), (attrs))
@@ -106,8 +109,9 @@ LIBSSH2_API int
 libssh2_publickey_list_fetch(LIBSSH2_PUBLICKEY *pkey,
                             unsigned long *num_keys,
                             libssh2_publickey_list **pkey_list);
-LIBSSH2_API void libssh2_publickey_list_free(LIBSSH2_PUBLICKEY *pkey,
-                                             libssh2_publickey_list *pkey_list);
+LIBSSH2_API void
+libssh2_publickey_list_free(LIBSSH2_PUBLICKEY *pkey,
+                            libssh2_publickey_list *pkey_list);

 LIBSSH2_API int libssh2_publickey_shutdown(LIBSSH2_PUBLICKEY *pkey);

--- a/include/libssh2_sftp.h
+++ b/include/libssh2_sftp.h
@@ -79,6 +79,9 @@ typedef struct _LIBSSH2_SFTP_STATVFS        LIBSSH2_SFTP_STATVFS;
 #define LIBSSH2_SFTP_READLINK           1
 #define LIBSSH2_SFTP_REALPATH           2

+/* Flags for sftp_mkdir() */
+#define LIBSSH2_SFTP_DEFAULT_MODE      -1
+
 /* SFTP attribute flag bits */
 #define LIBSSH2_SFTP_ATTR_SIZE              0x00000001
 #define LIBSSH2_SFTP_ATTR_UIDGID            0x00000002
@@ -186,32 +189,32 @@ struct _LIBSSH2_SFTP_STATVFS {
 #define LIBSSH2_FXF_EXCL                        0x00000020

 /* SFTP Status Codes (returned by libssh2_sftp_last_error() ) */
-#define LIBSSH2_FX_OK                       0
-#define LIBSSH2_FX_EOF                      1
-#define LIBSSH2_FX_NO_SUCH_FILE             2
-#define LIBSSH2_FX_PERMISSION_DENIED        3
-#define LIBSSH2_FX_FAILURE                  4
-#define LIBSSH2_FX_BAD_MESSAGE              5
-#define LIBSSH2_FX_NO_CONNECTION            6
-#define LIBSSH2_FX_CONNECTION_LOST          7
-#define LIBSSH2_FX_OP_UNSUPPORTED           8
-#define LIBSSH2_FX_INVALID_HANDLE           9
-#define LIBSSH2_FX_NO_SUCH_PATH             10
-#define LIBSSH2_FX_FILE_ALREADY_EXISTS      11
-#define LIBSSH2_FX_WRITE_PROTECT            12
-#define LIBSSH2_FX_NO_MEDIA                 13
-#define LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM   14
-#define LIBSSH2_FX_QUOTA_EXCEEDED           15
-#define LIBSSH2_FX_UNKNOWN_PRINCIPLE        16 /* Initial mis-spelling */
-#define LIBSSH2_FX_UNKNOWN_PRINCIPAL        16
-#define LIBSSH2_FX_LOCK_CONFlICT            17 /* Initial mis-spelling */
-#define LIBSSH2_FX_LOCK_CONFLICT            17
-#define LIBSSH2_FX_DIR_NOT_EMPTY            18
-#define LIBSSH2_FX_NOT_A_DIRECTORY          19
-#define LIBSSH2_FX_INVALID_FILENAME         20
-#define LIBSSH2_FX_LINK_LOOP                21
+#define LIBSSH2_FX_OK                       0UL
+#define LIBSSH2_FX_EOF                      1UL
+#define LIBSSH2_FX_NO_SUCH_FILE             2UL
+#define LIBSSH2_FX_PERMISSION_DENIED        3UL
+#define LIBSSH2_FX_FAILURE                  4UL
+#define LIBSSH2_FX_BAD_MESSAGE              5UL
+#define LIBSSH2_FX_NO_CONNECTION            6UL
+#define LIBSSH2_FX_CONNECTION_LOST          7UL
+#define LIBSSH2_FX_OP_UNSUPPORTED           8UL
+#define LIBSSH2_FX_INVALID_HANDLE           9UL
+#define LIBSSH2_FX_NO_SUCH_PATH             10UL
+#define LIBSSH2_FX_FILE_ALREADY_EXISTS      11UL
+#define LIBSSH2_FX_WRITE_PROTECT            12UL
+#define LIBSSH2_FX_NO_MEDIA                 13UL
+#define LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM   14UL
+#define LIBSSH2_FX_QUOTA_EXCEEDED           15UL
+#define LIBSSH2_FX_UNKNOWN_PRINCIPLE        16UL /* Initial mis-spelling */
+#define LIBSSH2_FX_UNKNOWN_PRINCIPAL        16UL
+#define LIBSSH2_FX_LOCK_CONFlICT            17UL /* Initial mis-spelling */
+#define LIBSSH2_FX_LOCK_CONFLICT            17UL
+#define LIBSSH2_FX_DIR_NOT_EMPTY            18UL
+#define LIBSSH2_FX_NOT_A_DIRECTORY          19UL
+#define LIBSSH2_FX_INVALID_FILENAME         20UL
+#define LIBSSH2_FX_LINK_LOOP                21UL

-/* Returned by any function that would block during a read/write opperation */
+/* Returned by any function that would block during a read/write operation */
 #define LIBSSH2SFTP_EAGAIN LIBSSH2_ERROR_EAGAIN

 /* SFTP API */
@@ -221,12 +224,13 @@ LIBSSH2_API unsigned long libssh2_sftp_last_error(LIBSSH2_SFTP *sftp);
 LIBSSH2_API LIBSSH2_CHANNEL *libssh2_sftp_get_channel(LIBSSH2_SFTP *sftp);

 /* File / Directory Ops */
-LIBSSH2_API LIBSSH2_SFTP_HANDLE *libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp,
-                                                      const char *filename,
-                                                      unsigned int filename_len,
-                                                      unsigned long flags,
-                                                      long mode, int open_type);
-#define libssh2_sftp_open(sftp, filename, flags, mode) \
+LIBSSH2_API LIBSSH2_SFTP_HANDLE *
+libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp,
+                     const char *filename,
+                     unsigned int filename_len,
+                     unsigned long flags,
+                     long mode, int open_type);
+#define libssh2_sftp_open(sftp, filename, flags, mode)                  \
    libssh2_sftp_open_ex((sftp), (filename), strlen(filename), (flags), \
                         (mode), LIBSSH2_SFTP_OPENFILE)
 #define libssh2_sftp_opendir(sftp, path) \
@@ -328,7 +332,8 @@ LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp,
                                        const char *path,
                                        unsigned int path_len,
                                        char *target,
-                                        unsigned int target_len, int link_type);
+                                        unsigned int target_len,
+                                        int link_type);
 #define libssh2_sftp_symlink(sftp, orig, linkpath) \
    libssh2_sftp_symlink_ex((sftp), (orig), strlen(orig), (linkpath), \
                            strlen(linkpath), LIBSSH2_SFTP_SYMLINK)
--- a/566
+++ b/566
@@ -1,7 +1,7 @@
 #!/bin/sh
 # install - install a program, script, or datafile

-scriptversion=2005-05-14.22
+scriptversion=2020-11-14.01; # UTC

 # This originates from X11R5 (mit/util/scripts/install.sh), which was
 # later released in X11R6 (xc/config/util/install.sh) with the
@@ -35,42 +35,62 @@ scriptversion=2005-05-14.22
 # FSF changes to this file are in the public domain.
 #
 # Calling this script install-sh is preferred over install.sh, to prevent
-# `make' implicit rules from creating a file called install from it
+# 'make' implicit rules from creating a file called install from it
 # when there is no Makefile.
 #
 # This script is compatible with the BSD install script, but was written
-# from scratch.  It can only install one file at a time, a restriction
-# shared with many OS's install programs.
+# from scratch.

-# set DOITPROG to echo to test this script
+tab='	'
+nl='
+'
+IFS=" $tab$nl"

-# Don't use :- since 4.3BSD and earlier shells don't like it.
-doit="${DOITPROG-}"
+# Set DOITPROG to "echo" to test this script.

-# put in absolute paths if you don't have them in your path; or use env. vars.
+doit=${DOITPROG-}
+doit_exec=${doit:-exec}

-mvprog="${MVPROG-mv}"
-cpprog="${CPPROG-cp}"
-chmodprog="${CHMODPROG-chmod}"
-chownprog="${CHOWNPROG-chown}"
-chgrpprog="${CHGRPPROG-chgrp}"
-stripprog="${STRIPPROG-strip}"
-rmprog="${RMPROG-rm}"
-mkdirprog="${MKDIRPROG-mkdir}"
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.

-chmodcmd="$chmodprog 0755"
-chowncmd=
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+# Create dirs (including intermediate dirs) using mode 755.
+# This is like GNU 'install' as of coreutils 8.32 (2020).
+mkdir_umask=22
+
+backupsuffix=
 chgrpcmd=
-stripcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
 rmcmd="$rmprog -f"
-mvcmd="$mvprog"
+stripcmd=
+
 src=
 dst=
 dir_arg=
-dstarg=
-no_target_directory=
+dst_arg=

-usage="Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+copy_on_change=false
+is_target_a_directory=possibly
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
   or: $0 [OPTION]... SRCFILES... DIRECTORY
   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
   or: $0 [OPTION]... -d DIRECTORIES...
@@ -80,108 +100,187 @@ In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
 In the 4th, create DIRECTORIES.

 Options:
-c         (ignored)
-d         create directories instead of installing files.
-g GROUP   $chgrpprog installed files to GROUP.
-m MODE    $chmodprog installed files to MODE.
-o USER    $chownprog installed files to USER.
-s         $stripprog installed files.
-t DIRECTORY  install into DIRECTORY.
-T         report an error if DSTFILE is a directory.
--help     display this help and exit.
--version  display version info and exit.
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -p            pass -p to $cpprog.
+  -s            $stripprog installed files.
+  -S SUFFIX     attempt to back up existing files, with suffix SUFFIX.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.

 Environment variables override the default commands:
-  CHGRPPROG CHMODPROG CHOWNPROG CPPROG MKDIRPROG MVPROG RMPROG STRIPPROG
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+
+By default, rm is invoked with -f; when overridden with RMPROG,
+it's up to you to specify -f if you want it.
+
+If -S is not specified, no backups are attempted.
+
+Email bug reports to bug-automake@gnu.org.
+Automake home page: https://www.gnu.org/software/automake/
 "

-while test -n "$1"; do
+while test $# -ne 0; do
  case $1 in
-    -c) shift
-        continue;;
+    -c) ;;

-    -d) dir_arg=true
-        shift
-        continue;;
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;

    -g) chgrpcmd="$chgrpprog $2"
-        shift
-        shift
-        continue;;
+        shift;;

    --help) echo "$usage"; exit $?;;

-    -m) chmodcmd="$chmodprog $2"
-        shift
-        shift
-        continue;;
+    -m) mode=$2
+        case $mode in
+          *' '* | *"$tab"* | *"$nl"* | *'*'* | *'?'* | *'['*)
+            echo "$0: invalid mode: $mode" >&2
+            exit 1;;
+        esac
+        shift;;

    -o) chowncmd="$chownprog $2"
-        shift
-        shift
-        continue;;
+        shift;;

-    -s) stripcmd=$stripprog
-        shift
-        continue;;
+    -p) cpprog="$cpprog -p";;

-    -t) dstarg=$2
-	shift
-	shift
-	continue;;
+    -s) stripcmd=$stripprog;;

-    -T) no_target_directory=true
-	shift
-	continue;;
+    -S) backupsuffix="$2"
+        shift;;
+
+    -t)
+        is_target_a_directory=always
+        dst_arg=$2
+        # Protect names problematic for 'test' and other utilities.
+        case $dst_arg in
+          -* | [=\(\)!]) dst_arg=./$dst_arg;;
+        esac
+        shift;;
+
+    -T) is_target_a_directory=never;;

    --version) echo "$0 $scriptversion"; exit $?;;

-    *)  # When -d is used, all remaining arguments are directories to create.
-	# When -t is used, the destination is already specified.
-	test -n "$dir_arg$dstarg" && break
-        # Otherwise, the last argument is the destination.  Remove it from $@.
-	for arg
-	do
-          if test -n "$dstarg"; then
-	    # $@ is not empty: it contains at least $arg.
-	    set fnord "$@" "$dstarg"
-	    shift # fnord
-	  fi
-	  shift # arg
-	  dstarg=$arg
-	done
-	break;;
+    --) shift
+        break;;
+
+    -*) echo "$0: invalid option: $1" >&2
+        exit 1;;
+
+    *)  break;;
  esac
+  shift
 done

-if test -z "$1"; then
+# We allow the use of options -d and -T together, by making -d
+# take the precedence; this is for compatibility with GNU install.
+
+if test -n "$dir_arg"; then
+  if test -n "$dst_arg"; then
+    echo "$0: target directory not allowed when installing a directory." >&2
+    exit 1
+  fi
+fi
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+    # Protect names problematic for 'test' and other utilities.
+    case $dst_arg in
+      -* | [=\(\)!]) dst_arg=./$dst_arg;;
+    esac
+  done
+fi
+
+if test $# -eq 0; then
  if test -z "$dir_arg"; then
    echo "$0: no input file specified." >&2
    exit 1
  fi
-  # It's OK to call `install-sh -d' without argument.
+  # It's OK to call 'install-sh -d' without argument.
  # This can happen when creating conditional directories.
  exit 0
 fi

+if test -z "$dir_arg"; then
+  if test $# -gt 1 || test "$is_target_a_directory" = always; then
+    if test ! -d "$dst_arg"; then
+      echo "$0: $dst_arg: Is not a directory." >&2
+      exit 1
+    fi
+  fi
+fi
+
+if test -z "$dir_arg"; then
+  do_exit='(exit $ret); exit $ret'
+  trap "ret=129; $do_exit" 1
+  trap "ret=130; $do_exit" 2
+  trap "ret=141; $do_exit" 13
+  trap "ret=143; $do_exit" 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+        u_plus_rw=
+      else
+        u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
 for src
 do
-  # Protect names starting with `-'.
+  # Protect names problematic for 'test' and other utilities.
  case $src in
-    -*) src=./$src ;;
+    -* | [=\(\)!]) src=./$src;;
  esac

  if test -n "$dir_arg"; then
    dst=$src
-    src=
-
-    if test -d "$dst"; then
-      mkdircmd=:
-      chmodcmd=
-    else
-      mkdircmd=$mkdirprog
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+    # Don't chown directories that already exist.
+    if test $dstdir_status = 0; then
+      chowncmd=""
    fi
  else
+
    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
    # might cause directories to be created, which would be especially bad
    # if $src (and thus $dsttmp) contains '*'.
@@ -190,82 +289,185 @@ do
      exit 1
    fi

-    if test -z "$dstarg"; then
+    if test -z "$dst_arg"; then
      echo "$0: no destination specified." >&2
      exit 1
    fi
+    dst=$dst_arg

-    dst=$dstarg
-    # Protect names starting with `-'.
-    case $dst in
-      -*) dst=./$dst ;;
-    esac
-
-    # If destination is a directory, append the input filename; won't work
-    # if double slashes aren't ignored.
+    # If destination is a directory, append the input filename.
    if test -d "$dst"; then
-      if test -n "$no_target_directory"; then
-	echo "$0: $dstarg: Is a directory" >&2
-	exit 1
+      if test "$is_target_a_directory" = never; then
+        echo "$0: $dst_arg: Is a directory" >&2
+        exit 1
      fi
-      dst=$dst/`basename "$src"`
+      dstdir=$dst
+      dstbase=`basename "$src"`
+      case $dst in
+	*/) dst=$dst$dstbase;;
+	*)  dst=$dst/$dstbase;;
+      esac
+      dstdir_status=0
+    else
+      dstdir=`dirname "$dst"`
+      test -d "$dstdir"
+      dstdir_status=$?
    fi
  fi

-  # This sed command emulates the dirname command.
-  dstdir=`echo "$dst" | sed -e 's,/*$,,;s,[^/]*$,,;s,/*$,,;s,^$,.,'`
+  case $dstdir in
+    */) dstdirslash=$dstdir;;
+    *)  dstdirslash=$dstdir/;;
+  esac

-  # Make sure that the destination directory exists.
+  obsolete_mkdir_used=false

-  # Skip lots of stat calls in the usual case.
-  if test ! -d "$dstdir"; then
-    defaultIFS='
-	 '
-    IFS="${IFS-$defaultIFS}"
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+        # With -d, create the new directory with the user-specified mode.
+        # Otherwise, rely on $mkdir_umask.
+        if test -n "$dir_arg"; then
+          mkdir_mode=-m$mode
+        else
+          mkdir_mode=
+        fi

-    oIFS=$IFS
-    # Some sh's can't handle IFS=/ for some reason.
-    IFS='%'
-    set x `echo "$dstdir" | sed -e 's@/@%@g' -e 's@^%@/@'`
-    shift
-    IFS=$oIFS
+        posix_mkdir=false
+	# The $RANDOM variable is not portable (e.g., dash).  Use it
+	# here however when possible just to lower collision chance.
+	tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$

-    pathcomp=
+	trap '
+	  ret=$?
+	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir" 2>/dev/null
+	  exit $ret
+	' 0

-    while test $# -ne 0 ; do
-      pathcomp=$pathcomp$1
+	# Because "mkdir -p" follows existing symlinks and we likely work
+	# directly in world-writeable /tmp, make sure that the '$tmpdir'
+	# directory is successfully created first before we actually test
+	# 'mkdir -p'.
+	if (umask $mkdir_umask &&
+	    $mkdirprog $mkdir_mode "$tmpdir" &&
+	    exec $mkdirprog $mkdir_mode -p -- "$tmpdir/a/b") >/dev/null 2>&1
+	then
+	  if test -z "$dir_arg" || {
+	       # Check for POSIX incompatibilities with -m.
+	       # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+	       # other-writable bit of parent directory when it shouldn't.
+	       # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+	       test_tmpdir="$tmpdir/a"
+	       ls_ld_tmpdir=`ls -ld "$test_tmpdir"`
+	       case $ls_ld_tmpdir in
+		 d????-?r-*) different_mode=700;;
+		 d????-?--*) different_mode=755;;
+		 *) false;;
+	       esac &&
+	       $mkdirprog -m$different_mode -p -- "$test_tmpdir" && {
+		 ls_ld_tmpdir_1=`ls -ld "$test_tmpdir"`
+		 test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+	       }
+	     }
+	  then posix_mkdir=:
+	  fi
+	  rmdir "$tmpdir/a/b" "$tmpdir/a" "$tmpdir"
+	else
+	  # Remove any dirs left behind by ancient mkdir implementations.
+	  rmdir ./$mkdir_mode ./-p ./-- "$tmpdir" 2>/dev/null
+	fi
+	trap '' 0;;
+    esac
+
+    if
+      $posix_mkdir && (
+        umask $mkdir_umask &&
+        $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+        /*) prefix='/';;
+        [-=\(\)!]*) prefix='./';;
+        *)  prefix='';;
+      esac
+
+      oIFS=$IFS
+      IFS=/
+      set -f
+      set fnord $dstdir
      shift
-      if test ! -d "$pathcomp"; then
-        $mkdirprog "$pathcomp"
-	# mkdir can fail with a `File exist' error in case several
-	# install-sh are creating the directory concurrently.  This
-	# is OK.
-	test -d "$pathcomp" || exit
+      set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+        test X"$d" = X && continue
+
+        prefix=$prefix$d
+        if test -d "$prefix"; then
+          prefixes=
+        else
+          if $posix_mkdir; then
+            (umask $mkdir_umask &&
+             $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+            # Don't fail if two instances are running concurrently.
+            test -d "$prefix" || exit 1
+          else
+            case $prefix in
+              *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+              *) qprefix=$prefix;;
+            esac
+            prefixes="$prefixes '$qprefix'"
+          fi
+        fi
+        prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+        # Don't fail if two instances are running concurrently.
+        (umask $mkdir_umask &&
+         eval "\$doit_exec \$mkdirprog $prefixes") ||
+          test -d "$dstdir" || exit 1
+        obsolete_mkdir_used=true
      fi
-      pathcomp=$pathcomp/
-    done
+    fi
  fi

  if test -n "$dir_arg"; then
-    $doit $mkdircmd "$dst" \
-      && { test -z "$chowncmd" || $doit $chowncmd "$dst"; } \
-      && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } \
-      && { test -z "$stripcmd" || $doit $stripcmd "$dst"; } \
-      && { test -z "$chmodcmd" || $doit $chmodcmd "$dst"; }
-
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
  else
-    dstfile=`basename "$dst"`

    # Make a couple of temp file names in the proper directory.
-    dsttmp=$dstdir/_inst.$$_
-    rmtmp=$dstdir/_rm.$$_
+    dsttmp=${dstdirslash}_inst.$$_
+    rmtmp=${dstdirslash}_rm.$$_

    # Trap to clean up those temp files at exit.
    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
-    trap '(exit $?); exit' 1 2 13 15

    # Copy the file name to the temp name.
-    $doit $cpprog "$src" "$dsttmp" &&
+    (umask $cp_umask &&
+     { test -z "$stripcmd" || {
+	 # Create $dsttmp read-write so that cp doesn't create it read-only,
+	 # which would cause strip to fail.
+	 if test -z "$doit"; then
+	   : >"$dsttmp" # No need to fork-exec 'touch'.
+	 else
+	   $doit touch "$dsttmp"
+	 fi
+       }
+     } &&
+     $doit_exec $cpprog "$src" "$dsttmp") &&

    # and set any options; do chmod last to preserve setuid bits.
    #
@@ -273,51 +475,67 @@ do
    # ignore errors from any of these, just make sure not to ignore
    # errors from the above "$doit $cpprog $src $dsttmp" command.
    #
-    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } \
-      && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } \
-      && { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } \
-      && { test -z "$chmodcmd" || $doit $chmodcmd "$dsttmp"; } &&
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&

-    # Now rename the file to the real destination.
-    { $doit $mvcmd -f "$dsttmp" "$dstdir/$dstfile" 2>/dev/null \
-      || {
-	   # The rename failed, perhaps because mv can't rename something else
-	   # to itself, or perhaps because mv is so ancient that it does not
-	   # support -f.
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"     2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"  2>/dev/null` &&
+       set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       set +f &&
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # If $backupsuffix is set, and the file being installed
+      # already exists, attempt a backup.  Don't worry if it fails,
+      # e.g., if mv doesn't support -f.
+      if test -n "$backupsuffix" && test -f "$dst"; then
+        $doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
+      fi

-	   # Now remove or move aside any old file at destination location.
-	   # We try this two ways since rm can't unlink itself on some
-	   # systems and the destination file might be busy for other
-	   # reasons.  In this case, the final cleanup might fail but the new
-	   # file should still install successfully.
-	   {
-	     if test -f "$dstdir/$dstfile"; then
-	       $doit $rmcmd -f "$dstdir/$dstfile" 2>/dev/null \
-	       || $doit $mvcmd -f "$dstdir/$dstfile" "$rmtmp" 2>/dev/null \
-	       || {
-		 echo "$0: cannot unlink or rename $dstdir/$dstfile" >&2
-		 (exit 1); exit 1
-	       }
-	     else
-	       :
-	     fi
-	   } &&
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||

-	   # Now rename the file to the real destination.
-	   $doit $mvcmd "$dsttmp" "$dstdir/$dstfile"
-	 }
-    }
-  fi || { (exit 1); exit 1; }
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+        # Now remove or move aside any old file at destination location.
+        # We try this two ways since rm can't unlink itself on some
+        # systems and the destination file might be busy for other
+        # reasons.  In this case, the final cleanup might fail but the new
+        # file should still install successfully.
+        {
+          test ! -f "$dst" ||
+          $doit $rmcmd "$dst" 2>/dev/null ||
+          { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+            { $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
+          } ||
+          { echo "$0: cannot unlink or rename $dst" >&2
+            (exit 1); exit 1
+          }
+        } &&
+
+        # Now rename the file to the real destination.
+        $doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
 done

-# The final little trick to "correctly" pass the exit status to the exit trap.
-{
-  (exit 0); exit 0
-}
-
 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-end: "$"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
 # End:
--- a/libssh2.pc.in
+++ b/libssh2.pc.in
@@ -8,10 +8,10 @@ libdir=@libdir@
 includedir=@includedir@

 Name: libssh2
-URL: http://www.libssh2.org/
+URL: https://www.libssh2.org/
 Description: Library for SSH-based communication
 Version: @LIBSSH2VER@
 Requires.private: @LIBSREQUIRED@
-Libs: -L${libdir} -lssh2 @LDFLAGS@ @LIBS@
+Libs: -L${libdir} -lssh2 @LIBS@
 Libs.private: @LIBS@
 Cflags: -I${includedir}
--- a/ltmain.sh
+++ b/ltmain.sh
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
--- a/m4/ltoptions.m4
+++ b/m4/ltoptions.m4
@@ -1,14 +1,14 @@
 # Helper functions for option handling.                    -*- Autoconf -*-
 #
-#   Copyright (C) 2004, 2005, 2007, 2008, 2009 Free Software Foundation,
-#   Inc.
+#   Copyright (C) 2004-2005, 2007-2009, 2011-2015 Free Software
+#   Foundation, Inc.
 #   Written by Gary V. Vaughan, 2004
 #
 # This file is free software; the Free Software Foundation gives
 # unlimited permission to copy and/or distribute it, with or without
 # modifications, as long as this notice is preserved.

-# serial 7 ltoptions.m4
+# serial 8 ltoptions.m4

 # This is to help aclocal find these macros, as it can't see m4_define.
 AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])])
@@ -29,7 +29,7 @@ m4_define([_LT_SET_OPTION],
 [m4_define(_LT_MANGLE_OPTION([$1], [$2]))dnl
 m4_ifdef(_LT_MANGLE_DEFUN([$1], [$2]),
        _LT_MANGLE_DEFUN([$1], [$2]),
-    [m4_warning([Unknown $1 option `$2'])])[]dnl
+    [m4_warning([Unknown $1 option '$2'])])[]dnl
 ])


@@ -75,13 +75,15 @@ m4_if([$1],[LT_INIT],[
  dnl
  dnl If no reference was made to various pairs of opposing options, then
  dnl we run the default mode handler for the pair.  For example, if neither
-  dnl `shared' nor `disable-shared' was passed, we enable building of shared
+  dnl 'shared' nor 'disable-shared' was passed, we enable building of shared
  dnl archives by default:
  _LT_UNLESS_OPTIONS([LT_INIT], [shared disable-shared], [_LT_ENABLE_SHARED])
  _LT_UNLESS_OPTIONS([LT_INIT], [static disable-static], [_LT_ENABLE_STATIC])
  _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC])
  _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install],
-  		   [_LT_ENABLE_FAST_INSTALL])
+		   [_LT_ENABLE_FAST_INSTALL])
+  _LT_UNLESS_OPTIONS([LT_INIT], [aix-soname=aix aix-soname=both aix-soname=svr4],
+		   [_LT_WITH_AIX_SONAME([aix])])
  ])
 ])# _LT_SET_OPTIONS

@@ -112,7 +114,7 @@ AU_DEFUN([AC_LIBTOOL_DLOPEN],
 [_LT_SET_OPTION([LT_INIT], [dlopen])
 AC_DIAGNOSE([obsolete],
 [$0: Remove this warning and the call to _LT_SET_OPTION when you
-put the `dlopen' option into LT_INIT's first parameter.])
+put the 'dlopen' option into LT_INIT's first parameter.])
 ])

 dnl aclocal-1.4 backwards compatibility:
@@ -148,7 +150,7 @@ AU_DEFUN([AC_LIBTOOL_WIN32_DLL],
 _LT_SET_OPTION([LT_INIT], [win32-dll])
 AC_DIAGNOSE([obsolete],
 [$0: Remove this warning and the call to _LT_SET_OPTION when you
-put the `win32-dll' option into LT_INIT's first parameter.])
+put the 'win32-dll' option into LT_INIT's first parameter.])
 ])

 dnl aclocal-1.4 backwards compatibility:
@@ -157,9 +159,9 @@ dnl AC_DEFUN([AC_LIBTOOL_WIN32_DLL], [])

 # _LT_ENABLE_SHARED([DEFAULT])
 # ----------------------------
-# implement the --enable-shared flag, and supports the `shared' and
-# `disable-shared' LT_INIT options.
-# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
+# implement the --enable-shared flag, and supports the 'shared' and
+# 'disable-shared' LT_INIT options.
+# DEFAULT is either 'yes' or 'no'.  If omitted, it defaults to 'yes'.
 m4_define([_LT_ENABLE_SHARED],
 [m4_define([_LT_ENABLE_SHARED_DEFAULT], [m4_if($1, no, no, yes)])dnl
 AC_ARG_ENABLE([shared],
@@ -172,14 +174,14 @@ AC_ARG_ENABLE([shared],
    *)
      enable_shared=no
      # Look at the argument we got.  We use all the common list separators.
-      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
      for pkg in $enableval; do
-	IFS="$lt_save_ifs"
+	IFS=$lt_save_ifs
 	if test "X$pkg" = "X$p"; then
 	  enable_shared=yes
 	fi
      done
-      IFS="$lt_save_ifs"
+      IFS=$lt_save_ifs
      ;;
    esac],
    [enable_shared=]_LT_ENABLE_SHARED_DEFAULT)
@@ -211,9 +213,9 @@ dnl AC_DEFUN([AM_DISABLE_SHARED], [])

 # _LT_ENABLE_STATIC([DEFAULT])
 # ----------------------------
-# implement the --enable-static flag, and support the `static' and
-# `disable-static' LT_INIT options.
-# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
+# implement the --enable-static flag, and support the 'static' and
+# 'disable-static' LT_INIT options.
+# DEFAULT is either 'yes' or 'no'.  If omitted, it defaults to 'yes'.
 m4_define([_LT_ENABLE_STATIC],
 [m4_define([_LT_ENABLE_STATIC_DEFAULT], [m4_if($1, no, no, yes)])dnl
 AC_ARG_ENABLE([static],
@@ -226,14 +228,14 @@ AC_ARG_ENABLE([static],
    *)
     enable_static=no
      # Look at the argument we got.  We use all the common list separators.
-      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
      for pkg in $enableval; do
-	IFS="$lt_save_ifs"
+	IFS=$lt_save_ifs
 	if test "X$pkg" = "X$p"; then
 	  enable_static=yes
 	fi
      done
-      IFS="$lt_save_ifs"
+      IFS=$lt_save_ifs
      ;;
    esac],
    [enable_static=]_LT_ENABLE_STATIC_DEFAULT)
@@ -265,9 +267,9 @@ dnl AC_DEFUN([AM_DISABLE_STATIC], [])

 # _LT_ENABLE_FAST_INSTALL([DEFAULT])
 # ----------------------------------
-# implement the --enable-fast-install flag, and support the `fast-install'
-# and `disable-fast-install' LT_INIT options.
-# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
+# implement the --enable-fast-install flag, and support the 'fast-install'
+# and 'disable-fast-install' LT_INIT options.
+# DEFAULT is either 'yes' or 'no'.  If omitted, it defaults to 'yes'.
 m4_define([_LT_ENABLE_FAST_INSTALL],
 [m4_define([_LT_ENABLE_FAST_INSTALL_DEFAULT], [m4_if($1, no, no, yes)])dnl
 AC_ARG_ENABLE([fast-install],
@@ -280,14 +282,14 @@ AC_ARG_ENABLE([fast-install],
    *)
      enable_fast_install=no
      # Look at the argument we got.  We use all the common list separators.
-      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
      for pkg in $enableval; do
-	IFS="$lt_save_ifs"
+	IFS=$lt_save_ifs
 	if test "X$pkg" = "X$p"; then
 	  enable_fast_install=yes
 	fi
      done
-      IFS="$lt_save_ifs"
+      IFS=$lt_save_ifs
      ;;
    esac],
    [enable_fast_install=]_LT_ENABLE_FAST_INSTALL_DEFAULT)
@@ -304,14 +306,14 @@ AU_DEFUN([AC_ENABLE_FAST_INSTALL],
 [_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[fast-install])
 AC_DIAGNOSE([obsolete],
 [$0: Remove this warning and the call to _LT_SET_OPTION when you put
-the `fast-install' option into LT_INIT's first parameter.])
+the 'fast-install' option into LT_INIT's first parameter.])
 ])

 AU_DEFUN([AC_DISABLE_FAST_INSTALL],
 [_LT_SET_OPTION([LT_INIT], [disable-fast-install])
 AC_DIAGNOSE([obsolete],
 [$0: Remove this warning and the call to _LT_SET_OPTION when you put
-the `disable-fast-install' option into LT_INIT's first parameter.])
+the 'disable-fast-install' option into LT_INIT's first parameter.])
 ])

 dnl aclocal-1.4 backwards compatibility:
@@ -319,11 +321,64 @@ dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], [])
 dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], [])


+# _LT_WITH_AIX_SONAME([DEFAULT])
+# ----------------------------------
+# implement the --with-aix-soname flag, and support the `aix-soname=aix'
+# and `aix-soname=both' and `aix-soname=svr4' LT_INIT options. DEFAULT
+# is either `aix', `both' or `svr4'.  If omitted, it defaults to `aix'.
+m4_define([_LT_WITH_AIX_SONAME],
+[m4_define([_LT_WITH_AIX_SONAME_DEFAULT], [m4_if($1, svr4, svr4, m4_if($1, both, both, aix))])dnl
+shared_archive_member_spec=
+case $host,$enable_shared in
+power*-*-aix[[5-9]]*,yes)
+  AC_MSG_CHECKING([which variant of shared library versioning to provide])
+  AC_ARG_WITH([aix-soname],
+    [AS_HELP_STRING([--with-aix-soname=aix|svr4|both],
+      [shared library versioning (aka "SONAME") variant to provide on AIX, @<:@default=]_LT_WITH_AIX_SONAME_DEFAULT[@:>@.])],
+    [case $withval in
+    aix|svr4|both)
+      ;;
+    *)
+      AC_MSG_ERROR([Unknown argument to --with-aix-soname])
+      ;;
+    esac
+    lt_cv_with_aix_soname=$with_aix_soname],
+    [AC_CACHE_VAL([lt_cv_with_aix_soname],
+      [lt_cv_with_aix_soname=]_LT_WITH_AIX_SONAME_DEFAULT)
+    with_aix_soname=$lt_cv_with_aix_soname])
+  AC_MSG_RESULT([$with_aix_soname])
+  if test aix != "$with_aix_soname"; then
+    # For the AIX way of multilib, we name the shared archive member
+    # based on the bitwidth used, traditionally 'shr.o' or 'shr_64.o',
+    # and 'shr.imp' or 'shr_64.imp', respectively, for the Import File.
+    # Even when GNU compilers ignore OBJECT_MODE but need '-maix64' flag,
+    # the AIX toolchain works better with OBJECT_MODE set (default 32).
+    if test 64 = "${OBJECT_MODE-32}"; then
+      shared_archive_member_spec=shr_64
+    else
+      shared_archive_member_spec=shr
+    fi
+  fi
+  ;;
+*)
+  with_aix_soname=aix
+  ;;
+esac
+
+_LT_DECL([], [shared_archive_member_spec], [0],
+    [Shared archive member basename, for filename based shared library versioning on AIX])dnl
+])# _LT_WITH_AIX_SONAME
+
+LT_OPTION_DEFINE([LT_INIT], [aix-soname=aix], [_LT_WITH_AIX_SONAME([aix])])
+LT_OPTION_DEFINE([LT_INIT], [aix-soname=both], [_LT_WITH_AIX_SONAME([both])])
+LT_OPTION_DEFINE([LT_INIT], [aix-soname=svr4], [_LT_WITH_AIX_SONAME([svr4])])
+
+
 # _LT_WITH_PIC([MODE])
 # --------------------
-# implement the --with-pic flag, and support the `pic-only' and `no-pic'
+# implement the --with-pic flag, and support the 'pic-only' and 'no-pic'
 # LT_INIT options.
-# MODE is either `yes' or `no'.  If omitted, it defaults to `both'.
+# MODE is either 'yes' or 'no'.  If omitted, it defaults to 'both'.
 m4_define([_LT_WITH_PIC],
 [AC_ARG_WITH([pic],
    [AS_HELP_STRING([--with-pic@<:@=PKGS@:>@],
@@ -334,19 +389,17 @@ m4_define([_LT_WITH_PIC],
    *)
      pic_mode=default
      # Look at the argument we got.  We use all the common list separators.
-      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
+      lt_save_ifs=$IFS; IFS=$IFS$PATH_SEPARATOR,
      for lt_pkg in $withval; do
-	IFS="$lt_save_ifs"
+	IFS=$lt_save_ifs
 	if test "X$lt_pkg" = "X$lt_p"; then
 	  pic_mode=yes
 	fi
      done
-      IFS="$lt_save_ifs"
+      IFS=$lt_save_ifs
      ;;
    esac],
-    [pic_mode=default])
-
-test -z "$pic_mode" && pic_mode=m4_default([$1], [default])
+    [pic_mode=m4_default([$1], [default])])

 _LT_DECL([], [pic_mode], [0], [What type of objects to build])dnl
 ])# _LT_WITH_PIC
@@ -359,7 +412,7 @@ AU_DEFUN([AC_LIBTOOL_PICMODE],
 [_LT_SET_OPTION([LT_INIT], [pic-only])
 AC_DIAGNOSE([obsolete],
 [$0: Remove this warning and the call to _LT_SET_OPTION when you
-put the `pic-only' option into LT_INIT's first parameter.])
+put the 'pic-only' option into LT_INIT's first parameter.])
 ])

 dnl aclocal-1.4 backwards compatibility:
--- a/m4/ltsugar.m4
+++ b/m4/ltsugar.m4
@@ -1,6 +1,7 @@
 # ltsugar.m4 -- libtool m4 base layer.                         -*-Autoconf-*-
 #
-# Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2004-2005, 2007-2008, 2011-2015 Free Software
+# Foundation, Inc.
 # Written by Gary V. Vaughan, 2004
 #
 # This file is free software; the Free Software Foundation gives
@@ -33,7 +34,7 @@ m4_define([_lt_join],
 # ------------
 # Manipulate m4 lists.
 # These macros are necessary as long as will still need to support
-# Autoconf-2.59 which quotes differently.
+# Autoconf-2.59, which quotes differently.
 m4_define([lt_car], [[$1]])
 m4_define([lt_cdr],
 [m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
@@ -44,7 +45,7 @@ m4_define([lt_unquote], $1)

 # lt_append(MACRO-NAME, STRING, [SEPARATOR])
 # ------------------------------------------
-# Redefine MACRO-NAME to hold its former content plus `SEPARATOR'`STRING'.
+# Redefine MACRO-NAME to hold its former content plus 'SEPARATOR''STRING'.
 # Note that neither SEPARATOR nor STRING are expanded; they are appended
 # to MACRO-NAME as is (leaving the expansion for when MACRO-NAME is invoked).
 # No SEPARATOR is output if MACRO-NAME was previously undefined (different
--- a/m4/ltversion.m4
+++ b/m4/ltversion.m4
@@ -1,6 +1,6 @@
 # ltversion.m4 -- version numbers			-*- Autoconf -*-
 #
-#   Copyright (C) 2004 Free Software Foundation, Inc.
+#   Copyright (C) 2004, 2011-2015 Free Software Foundation, Inc.
 #   Written by Scott James Remnant, 2004
 #
 # This file is free software; the Free Software Foundation gives
@@ -9,15 +9,15 @@

 # @configure_input@

-# serial 3337 ltversion.m4
+# serial 4179 ltversion.m4
 # This file is part of GNU Libtool

-m4_define([LT_PACKAGE_VERSION], [2.4.2])
-m4_define([LT_PACKAGE_REVISION], [1.3337])
+m4_define([LT_PACKAGE_VERSION], [2.4.6])
+m4_define([LT_PACKAGE_REVISION], [2.4.6])

 AC_DEFUN([LTVERSION_VERSION],
-[macro_version='2.4.2'
-macro_revision='1.3337'
+[macro_version='2.4.6'
+macro_revision='2.4.6'
 _LT_DECL(, macro_version, 0, [Which release of libtool.m4 was used?])
 _LT_DECL(, macro_revision, 0)
 ])
--- a/m4/lt~obsolete.m4
+++ b/m4/lt~obsolete.m4
@@ -1,6 +1,7 @@
 # lt~obsolete.m4 -- aclocal satisfying obsolete definitions.    -*-Autoconf-*-
 #
-#   Copyright (C) 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
+#   Copyright (C) 2004-2005, 2007, 2009, 2011-2015 Free Software
+#   Foundation, Inc.
 #   Written by Scott James Remnant, 2004.
 #
 # This file is free software; the Free Software Foundation gives
@@ -11,7 +12,7 @@

 # These exist entirely to fool aclocal when bootstrapping libtool.
 #
-# In the past libtool.m4 has provided macros via AC_DEFUN (or AU_DEFUN)
+# In the past libtool.m4 has provided macros via AC_DEFUN (or AU_DEFUN),
 # which have later been changed to m4_define as they aren't part of the
 # exported API, or moved to Autoconf or Automake where they belong.
 #
@@ -25,7 +26,7 @@
 # included after everything else.  This provides aclocal with the
 # AC_DEFUNs it wants, but when m4 processes it, it doesn't do anything
 # because those macros already exist, or will be overwritten later.
-# We use AC_DEFUN over AU_DEFUN for compatibility with aclocal-1.6. 
+# We use AC_DEFUN over AU_DEFUN for compatibility with aclocal-1.6.
 #
 # Anytime we withdraw an AC_DEFUN or AU_DEFUN, remember to add it here.
 # Yes, that means every name once taken will need to remain here until
--- a/29
+++ b/29
@@ -9,6 +9,11 @@ if [ -z "$version" ]; then
  exit
 fi

+if [ "xonly" = "x$2" ]; then
+    echo "Setup version number only!"
+    only=1
+fi
+
 libversion="$version"

 major=`echo $libversion |cut -d. -f1 | sed -e "s/[^0-9]//g"`
@@ -19,22 +24,36 @@ numeric=`perl -e 'printf("%02x%02x%02x\n", '"$major, $minor, $patch);"`

 HEADER=include/libssh2.h

-# requires a date command that knows -u for UTC time zone
-datestamp=`date -u`
+if test -z "$only"; then
+    ext=".dist"
+    # when not setting up version numbers locally
+    for a in $HEADER; do
+        cp $a "$a$ext"
+    done
+    HEADER="$HEADER$ext"
+fi

-# Replace version number in header file:
-sed -e 's/^#define LIBSSH2_VERSION .*/#define LIBSSH2_VERSION "'$libversion'"/g' \
+# requires a date command that knows -u for UTC time zone
+datestamp=`LC_TIME=C date -u`
+
+# Replace in-place version number in header file:
+sed -i -e 's/^#define LIBSSH2_VERSION .*/#define LIBSSH2_VERSION "'$libversion'"/g' \
    -e 's/^#define LIBSSH2_VERSION_NUM .*/#define LIBSSH2_VERSION_NUM 0x'$numeric'/g' \
    -e 's/^#define LIBSSH2_VERSION_MAJOR .*/#define LIBSSH2_VERSION_MAJOR '$major'/g' \
    -e 's/^#define LIBSSH2_VERSION_MINOR .*/#define LIBSSH2_VERSION_MINOR '$minor'/g' \
    -e 's/^#define LIBSSH2_VERSION_PATCH .*/#define LIBSSH2_VERSION_PATCH '$patch'/g' \
    -e "s/^#define LIBSSH2_TIMESTAMP .*/#define LIBSSH2_TIMESTAMP \"$datestamp\"/g" \
- $HEADER >$HEADER.dist
+ $HEADER

 echo "libssh2 version $libversion"
 echo "libssh2 numerical $numeric"
 echo "datestamp $datestamp"

+if test -n "$only"; then
+    # done!
+    exit;
+fi
+
 findprog()
 {
  file="$1"
--- a/451
+++ b/451
@@ -1,11 +1,10 @@
 #! /bin/sh
-# Common stub for a few missing GNU programs while installing.
+# Common wrapper for a few potentially missing GNU programs.

-scriptversion=2005-06-08.21
+scriptversion=2018-03-07.03; # UTC

-# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005
-#   Free Software Foundation, Inc.
-# Originally by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+# Copyright (C) 1996-2020 Free Software Foundation, Inc.
+# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.

 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -18,9 +17,7 @@ scriptversion=2005-06-08.21
 # GNU General Public License for more details.

 # You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.

 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@@ -28,63 +25,40 @@ scriptversion=2005-06-08.21
 # the same distribution terms that you use for the rest of that program.

 if test $# -eq 0; then
-  echo 1>&2 "Try \`$0 --help' for more information"
+  echo 1>&2 "Try '$0 --help' for more information"
  exit 1
 fi

-run=:
+case $1 in

-# In the cases where this matters, `missing' is being run in the
-# srcdir already.
-if test -f configure.ac; then
-  configure_ac=configure.ac
-else
-  configure_ac=configure.in
-fi
+  --is-lightweight)
+    # Used by our autoconf macros to check whether the available missing
+    # script is modern enough.
+    exit 0
+    ;;

-msg="missing on your system"
-
-case "$1" in
--run)
-  # Try to run requested program, and just exit if it succeeds.
-  run=
-  shift
-  "$@" && exit 0
-  # Exit code 63 means version mismatch.  This often happens
-  # when the user try to use an ancient version of a tool on
-  # a file that requires a minimum version.  In this case we
-  # we should proceed has if the program had been absent, or
-  # if --run hadn't been passed.
-  if test $? = 63; then
-    run=:
-    msg="probably too old"
-  fi
-  ;;
+  --run)
+    # Back-compat with the calling convention used by older automake.
+    shift
+    ;;

  -h|--h|--he|--hel|--help)
    echo "\
 $0 [OPTION]... PROGRAM [ARGUMENT]...

-Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an
-error status if there is no known handling for PROGRAM.
+Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
+to PROGRAM being missing or too old.

 Options:
  -h, --help      display this help and exit
  -v, --version   output version information and exit
-  --run           try to run the given command, and emulate it if it fails

 Supported PROGRAM values:
-  aclocal      touch file \`aclocal.m4'
-  autoconf     touch file \`configure'
-  autoheader   touch file \`config.h.in'
-  automake     touch all \`Makefile.in' files
-  bison        create \`y.tab.[ch]', if possible, from existing .[ch]
-  flex         create \`lex.yy.c', if possible, from existing .c
-  help2man     touch the output file
-  lex          create \`lex.yy.c', if possible, from existing .c
-  makeinfo     touch the output file
-  tar          try tar, gnutar, gtar, then tar without non-portable flags
-  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]
+  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
+  bison     yacc      flex         lex       help2man
+
+Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
+'g' are ignored when checking the name.

 Send bug reports to <bug-automake@gnu.org>."
    exit $?
@@ -96,265 +70,146 @@ Send bug reports to <bug-automake@gnu.org>."
    ;;

  -*)
-    echo 1>&2 "$0: Unknown \`$1' option"
-    echo 1>&2 "Try \`$0 --help' for more information"
+    echo 1>&2 "$0: unknown '$1' option"
+    echo 1>&2 "Try '$0 --help' for more information"
    exit 1
    ;;

 esac

-# Now exit if we have it, but it failed.  Also exit now if we
-# don't have it and --version was passed (most likely to detect
-# the program).
-case "$1" in
-  lex|yacc)
-    # Not GNU programs, they don't have --version.
+# Run the given program, remember its exit status.
+"$@"; st=$?
+
+# If it succeeded, we are done.
+test $st -eq 0 && exit 0
+
+# Also exit now if we it failed (or wasn't found), and '--version' was
+# passed; such an option is passed most likely to detect whether the
+# program is present and works.
+case $2 in --version|--help) exit $st;; esac
+
+# Exit code 63 means version mismatch.  This often happens when the user
+# tries to use an ancient version of a tool on a file that requires a
+# minimum version.
+if test $st -eq 63; then
+  msg="probably too old"
+elif test $st -eq 127; then
+  # Program was missing.
+  msg="missing on your system"
+else
+  # Program was found and executed, but failed.  Give up.
+  exit $st
+fi
+
+perl_URL=https://www.perl.org/
+flex_URL=https://github.com/westes/flex
+gnu_software_URL=https://www.gnu.org/software
+
+program_details ()
+{
+  case $1 in
+    aclocal|automake)
+      echo "The '$1' program is part of the GNU Automake package:"
+      echo "<$gnu_software_URL/automake>"
+      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/autoconf>"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+    autoconf|autom4te|autoheader)
+      echo "The '$1' program is part of the GNU Autoconf package:"
+      echo "<$gnu_software_URL/autoconf/>"
+      echo "It also requires GNU m4 and Perl in order to run:"
+      echo "<$gnu_software_URL/m4/>"
+      echo "<$perl_URL>"
+      ;;
+  esac
+}
+
+give_advice ()
+{
+  # Normalize program name to check for.
+  normalized_program=`echo "$1" | sed '
+    s/^gnu-//; t
+    s/^gnu//; t
+    s/^g//; t'`
+
+  printf '%s\n' "'$1' is $msg."
+
+  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
+  case $normalized_program in
+    autoconf*)
+      echo "You should only need it if you modified 'configure.ac',"
+      echo "or m4 files included by it."
+      program_details 'autoconf'
+      ;;
+    autoheader*)
+      echo "You should only need it if you modified 'acconfig.h' or"
+      echo "$configure_deps."
+      program_details 'autoheader'
+      ;;
+    automake*)
+      echo "You should only need it if you modified 'Makefile.am' or"
+      echo "$configure_deps."
+      program_details 'automake'
+      ;;
+    aclocal*)
+      echo "You should only need it if you modified 'acinclude.m4' or"
+      echo "$configure_deps."
+      program_details 'aclocal'
+      ;;
+   autom4te*)
+      echo "You might have modified some maintainer files that require"
+      echo "the 'autom4te' program to be rebuilt."
+      program_details 'autom4te'
+      ;;
+    bison*|yacc*)
+      echo "You should only need it if you modified a '.y' file."
+      echo "You may want to install the GNU Bison package:"
+      echo "<$gnu_software_URL/bison/>"
+      ;;
+    lex*|flex*)
+      echo "You should only need it if you modified a '.l' file."
+      echo "You may want to install the Fast Lexical Analyzer package:"
+      echo "<$flex_URL>"
+      ;;
+    help2man*)
+      echo "You should only need it if you modified a dependency" \
+           "of a man page."
+      echo "You may want to install the GNU Help2man package:"
+      echo "<$gnu_software_URL/help2man/>"
    ;;
+    makeinfo*)
+      echo "You should only need it if you modified a '.texi' file, or"
+      echo "any other file indirectly affecting the aspect of the manual."
+      echo "You might want to install the Texinfo package:"
+      echo "<$gnu_software_URL/texinfo/>"
+      echo "The spurious makeinfo call might also be the consequence of"
+      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
+      echo "want to install GNU make:"
+      echo "<$gnu_software_URL/make/>"
+      ;;
+    *)
+      echo "You might have modified some files without having the proper"
+      echo "tools for further handling them.  Check the 'README' file, it"
+      echo "often tells you about the needed prerequisites for installing"
+      echo "this package.  You may also peek at any GNU archive site, in"
+      echo "case some other package contains this missing '$1' program."
+      ;;
+  esac
+}

-  tar)
-    if test -n "$run"; then
-       echo 1>&2 "ERROR: \`tar' requires --run"
-       exit 1
-    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
-       exit 1
-    fi
-    ;;
+give_advice "$1" | sed -e '1s/^/WARNING: /' \
+                       -e '2,$s/^/         /' >&2

-  *)
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
-       # We have it, but it failed.
-       exit 1
-    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
-       # Could not run --version or --help.  This is probably someone
-       # running `$TOOL --version' or `$TOOL --help' to check whether
-       # $TOOL exists and not knowing $TOOL uses missing.
-       exit 1
-    fi
-    ;;
-esac
-
-# If it does not exist, or fails to run (possibly an outdated version),
-# try to emulate it.
-case "$1" in
-  aclocal*)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-         you modified \`acinclude.m4' or \`${configure_ac}'.  You might want
-         to install the \`Automake' and \`Perl' packages.  Grab them from
-         any GNU archive site."
-    touch aclocal.m4
-    ;;
-
-  autoconf)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-         you modified \`${configure_ac}'.  You might want to install the
-         \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
-         archive site."
-    touch configure
-    ;;
-
-  autoheader)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-         you modified \`acconfig.h' or \`${configure_ac}'.  You might want
-         to install the \`Autoconf' and \`GNU m4' packages.  Grab them
-         from any GNU archive site."
-    files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^)]*\)).*/\1/p' ${configure_ac}`
-    test -z "$files" && files="config.h"
-    touch_files=
-    for f in $files; do
-      case "$f" in
-      *:*) touch_files="$touch_files "`echo "$f" |
-				       sed -e 's/^[^:]*://' -e 's/:.*//'`;;
-      *) touch_files="$touch_files $f.in";;
-      esac
-    done
-    touch $touch_files
-    ;;
-
-  automake*)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-         you modified \`Makefile.am', \`acinclude.m4' or \`${configure_ac}'.
-         You might want to install the \`Automake' and \`Perl' packages.
-         Grab them from any GNU archive site."
-    find . -type f -name Makefile.am -print |
-	   sed 's/\.am$/.in/' |
-	   while read f; do touch "$f"; done
-    ;;
-
-  autom4te)
-    echo 1>&2 "\
-WARNING: \`$1' is needed, but is $msg.
-         You might have modified some files without having the
-         proper tools for further handling them.
-         You can get \`$1' as part of \`Autoconf' from any GNU
-         archive site."
-
-    file=`echo "$*" | sed -n 's/.*--output[ =]*\([^ ]*\).*/\1/p'`
-    test -z "$file" && file=`echo "$*" | sed -n 's/.*-o[ ]*\([^ ]*\).*/\1/p'`
-    if test -f "$file"; then
-	touch $file
-    else
-	test -z "$file" || exec >$file
-	echo "#! /bin/sh"
-	echo "# Created by GNU Automake missing as a replacement of"
-	echo "#  $ $@"
-	echo "exit 0"
-	chmod +x $file
-	exit 1
-    fi
-    ;;
-
-  bison|yacc)
-    echo 1>&2 "\
-WARNING: \`$1' $msg.  You should only need it if
-         you modified a \`.y' file.  You may need the \`Bison' package
-         in order for those modifications to take effect.  You can get
-         \`Bison' from any GNU archive site."
-    rm -f y.tab.c y.tab.h
-    if [ $# -ne 1 ]; then
-        eval LASTARG="\${$#}"
-	case "$LASTARG" in
-	*.y)
-	    SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
-	    if [ -f "$SRCFILE" ]; then
-	         cp "$SRCFILE" y.tab.c
-	    fi
-	    SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
-	    if [ -f "$SRCFILE" ]; then
-	         cp "$SRCFILE" y.tab.h
-	    fi
-	  ;;
-	esac
-    fi
-    if [ ! -f y.tab.h ]; then
-	echo >y.tab.h
-    fi
-    if [ ! -f y.tab.c ]; then
-	echo 'main() { return 0; }' >y.tab.c
-    fi
-    ;;
-
-  lex|flex)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-         you modified a \`.l' file.  You may need the \`Flex' package
-         in order for those modifications to take effect.  You can get
-         \`Flex' from any GNU archive site."
-    rm -f lex.yy.c
-    if [ $# -ne 1 ]; then
-        eval LASTARG="\${$#}"
-	case "$LASTARG" in
-	*.l)
-	    SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
-	    if [ -f "$SRCFILE" ]; then
-	         cp "$SRCFILE" lex.yy.c
-	    fi
-	  ;;
-	esac
-    fi
-    if [ ! -f lex.yy.c ]; then
-	echo 'main() { return 0; }' >lex.yy.c
-    fi
-    ;;
-
-  help2man)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-	 you modified a dependency of a manual page.  You may need the
-	 \`Help2man' package in order for those modifications to take
-	 effect.  You can get \`Help2man' from any GNU archive site."
-
-    file=`echo "$*" | sed -n 's/.*-o \([^ ]*\).*/\1/p'`
-    if test -z "$file"; then
-	file=`echo "$*" | sed -n 's/.*--output=\([^ ]*\).*/\1/p'`
-    fi
-    if [ -f "$file" ]; then
-	touch $file
-    else
-	test -z "$file" || exec >$file
-	echo ".ab help2man is required to generate this page"
-	exit 1
-    fi
-    ;;
-
-  makeinfo)
-    echo 1>&2 "\
-WARNING: \`$1' is $msg.  You should only need it if
-         you modified a \`.texi' or \`.texinfo' file, or any other file
-         indirectly affecting the aspect of the manual.  The spurious
-         call might also be the consequence of using a buggy \`make' (AIX,
-         DU, IRIX).  You might want to install the \`Texinfo' package or
-         the \`GNU make' package.  Grab either from any GNU archive site."
-    # The file to touch is that specified with -o ...
-    file=`echo "$*" | sed -n 's/.*-o \([^ ]*\).*/\1/p'`
-    if test -z "$file"; then
-      # ... or it is the one specified with @setfilename ...
-      infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
-      file=`sed -n '/^@setfilename/ { s/.* \([^ ]*\) *$/\1/; p; q; }' $infile`
-      # ... or it is derived from the source name (dir/f.texi becomes f.info)
-      test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info
-    fi
-    # If the file does not exist, the user really needs makeinfo;
-    # let's fail without touching anything.
-    test -f $file || exit 1
-    touch $file
-    ;;
-
-  tar)
-    shift
-
-    # We have already tried tar in the generic part.
-    # Look for gnutar/gtar before invocation to avoid ugly error
-    # messages.
-    if (gnutar --version > /dev/null 2>&1); then
-       gnutar "$@" && exit 0
-    fi
-    if (gtar --version > /dev/null 2>&1); then
-       gtar "$@" && exit 0
-    fi
-    firstarg="$1"
-    if shift; then
-	case "$firstarg" in
-	*o*)
-	    firstarg=`echo "$firstarg" | sed s/o//`
-	    tar "$firstarg" "$@" && exit 0
-	    ;;
-	esac
-	case "$firstarg" in
-	*h*)
-	    firstarg=`echo "$firstarg" | sed s/h//`
-	    tar "$firstarg" "$@" && exit 0
-	    ;;
-	esac
-    fi
-
-    echo 1>&2 "\
-WARNING: I can't seem to be able to run \`tar' with the given arguments.
-         You may want to install GNU tar or Free paxutils, or check the
-         command line arguments."
-    exit 1
-    ;;
-
-  *)
-    echo 1>&2 "\
-WARNING: \`$1' is needed, and is $msg.
-         You might have modified some files without having the
-         proper tools for further handling them.  Check the \`README' file,
-         it often tells you about the needed prerequisites for installing
-         this package.  You may also peek at any GNU archive site, in case
-         some other package would contain this missing \`$1' program."
-    exit 1
-    ;;
-esac
-
-exit 0
+# Propagate the correct exit status (expected to be 127 for a program
+# not found, 63 for a program that failed due to version mismatch).
+exit $st

 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-end: "$"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
 # End:
--- a/nw/GNUmakefile
+++ b/nw/GNUmakefile
@@ -38,7 +38,7 @@ DEVLARC	= $(DEVLDIR).zip
 TARGET	= libssh2
 VERSION	= $(LIBSSH2_VERSION)
 CPRIGHT	= Copyright (c) $(LIBSSH2_COPYRIGHT_STR)
-WWWURL	= http://www.libssh2.org/
+WWWURL	= https://www.libssh2.org/
 DESCR	= libssh2 $(LIBSSH2_VERSION_STR) ($(LIBARCH)) - $(WWWURL)
 MTSAFE	= YES
 STACK	= 64000
@@ -223,7 +223,7 @@ include ../Makefile.inc
 OBJECTS := $(patsubst %.c,%.o,$(CSOURCES))
 ifeq ($(LIBARCH),CLIB)
 # CLIB lacks of snprint() function - here's a replacement:
-# http://www.ijs.si/software/snprintf/
+# https://www.ijs.si/software/snprintf/
 OBJECTS += snprintf.o
 vpath %.c $(SNPRINTF)
 endif
@@ -388,7 +388,7 @@ libssh2_config.h: GNUmakefile
 	@echo $(DL)** All your changes will be lost!!$(DL) >> $@
 	@echo $(DL)*/$(DL) >> $@
 	@echo $(DL)#define VERSION "$(LIBSSH2_VERSION_STR)"$(DL) >> $@
-	@echo $(DL)#define PACKAGE_BUGREPORT "http://sourceforge.net/projects/libssh2"$(DL) >> $@
+	@echo $(DL)#define PACKAGE_BUGREPORT "https://github.com/libssh2/libssh2/issues"$(DL) >> $@
 ifeq ($(LIBARCH),CLIB)
 	@echo $(DL)#define OS "i586-pc-clib-NetWare"$(DL) >> $@
 	@echo $(DL)#define NETDB_USE_INTERNET 1$(DL) >> $@
@@ -545,6 +545,7 @@ endif
 	@echo $(DL)  libssh2_knownhost_readfile,$(DL) >> $@
 	@echo $(DL)  libssh2_knownhost_writefile,$(DL) >> $@
 	@echo $(DL)  libssh2_scp_recv,$(DL) >> $@
+	@echo $(DL)  libssh2_scp_recv2,$(DL) >> $@
 	@echo $(DL)  libssh2_scp_send64,$(DL) >> $@
 	@echo $(DL)  libssh2_scp_send_ex,$(DL) >> $@
 	@echo $(DL)  libssh2_session_abstract,$(DL) >> $@
--- a/os400/README400
+++ b/os400/README400
@@ -0,0 +1,169 @@
+
+Implementation notes:
+
+  This is a true OS/400 implementation, not a PASE implementation (for PASE,
+use AIX implementation).
+
+It uses ASCII as internal character set. This has been accomplished using the
+QADRT library and include files, a C and system procedures ASCII wrapper
+library. See IBM QADRT description for more information.
+  This results in libssh2 being an ASCII library: any function string
+argument is taken/returned in ASCII and a C/C++ calling program built around
+QADRT may use libssh2 functions as on any other platform.
+  QADRT does not define ASCII wrappers for all C/system procedures: an
+additional module (os400sys.c) define some more of them, that are used by
+libssh2 and that QADRT left out.
+  Since standard library entry points expect and return ASCII character strings,
+additional procedures are provided for string transcoding (see below). No
+wrappers to standard procedures are provided: however, nested calls to
+transcoding procedures may be used.
+
+Crypto API is provided by the IBM QC3 API library. It supports RSA, but not DSA.
+
+
+  Standard compilation environment does support neither autotools nor make;
+in fact, very few common utilities are available. As a consequence, the
+libssh2_config.h has been coded manually and the compilation scripts are
+a set of shell scripts stored in subdirectory os400.
+
+  The test environment is currently not supported on OS/400.
+
+
+
+Compiling on OS/400:
+
+  These instructions target people who knows about OS/400, compiling, IFS and
+archive extraction. Do not ask questions about these subjects if you're not
+familiar with.
+
+_ As a prerequisite, QADRT development environment must be installed.
+_ Install the libssh2 sources directory in IFS.
+_ Enter shell (QSH)
+_ Change current directory to the libssh2 sources installation directory
+_ Change current directory to os400
+_ Edit file iniscript.sh. You may want to change tunable configuration
+  parameters, like debug info generation, optimisation level, listing option,
+  target library, zlib availability and location, etc.
+_ Copy any file in the current directory to makelog (i.e.:
+  cp initscript.sh makelog): this is intended to create the makelog file with
+  an ASCII CCSID!
+_ Enter the command "sh make.sh > makelog 2>&1'
+_ Examine the makelog file to check for compilation errors.
+
+  Leaving file initscript.sh unchanged, this will produce the following OS/400
+objects:
+_ Library LIBSSH2. All other objects will be stored in this library.
+_ Modules for all libssh2 units.
+_ Binding directory LIBSSH2_A, to be used at calling program link time for
+  statically binding the modules (specify BNDSRVPGM(QADRTTS) when creating a
+  program using LIBSSH2_A. Also give access to the zlib BNDDIR/SRVPGM if
+  libssh2 is compiled with zlib).
+_ Service program LIBSSH2.<soname>, where <soname> is extracted from the
+  src/Makefile.am VERSION variable. To be used at calling program run-time
+  when this program has dynamically bound libssh2 at link time.
+_ Binding directory LIBSSH2. To be used to dynamically bind libssh2 when
+  linking a calling program.
+_ Source file H. It contains all the include members needed to compile a C/C++
+  module using libssh2.
+_ LIBSSH2, SSH2_PKEY, SSH2_SFTP members in file H. These are the C/C++ header
+  files. Original fames have been mangled to fit member name allowed syntax.
+_ Source file LIBSSH2RPG. It contains all the ILE/RPG /INCLUDE members
+  needed to compile an ILE/RPG program calling libssh2 procedures.
+_ LIBSSH2, SSH2_PKEY, SSH2_SFTP members in file LIBSSH2RPG. These are
+  ILE/RPG translations of the corresponding C header files.
+
+
+
+Special programming consideration:
+
+QADRT being used, the following points must be considered:
+_ If static binding is used, service program QADRTTS must be linked too.
+_ Likewise, if libssh2 has been compiled with zlib support, access to the
+  zlib objects must be provided at link time.
+_ The EBCDIC CCSID used by QADRT is 37 by default, NOT THE JOB'S CCSID. If
+  another EBCDIC CCSID is required, it must be set via a locale through a call
+  to setlocale_a (QADRT's setlocale() ASCII wrapper) with category LC_ALL or
+  LC_CTYPE, or by setting environment variable QADRT_ENV_LOCALE to the locale
+  object path before executing the program.
+_ Do not use original source include files unless you know what you are doing.
+  Use the installed members instead (in /QSYS.LIB/LIBSSH2.LIB/H.FILE).
+
+
+
+String transcoding support:
+
+  To help passing arbitrarily encoded string arguments and/or receiving string
+values from/to the libssh2 API, three non-standard additional procedures are
+provided. They use a session pointer and a "string cache" pointer.
+  Each time a string is transcoded, it is cached in the given cache. It is
+the responsibility of the caller to release the cache when its associted strings
+are no longer needed. These procedures and the string cache type are defined
+in a new libssh2_ccsid.h header file.
+  To create a string cache, use:
+
+#include <libssh2_ccsid.h>
+libssh2_string_cache *  cache = NULL;
+
+  To release all strings in a cache, call:
+
+libssh2_release_string_cache(session, &cache);
+
+  The transcoding procedures are:
+
+char * libssh2_from_ccsid(LIBSSH2_SESSION *session,
+                          libssh2_string_cache **cache,
+                          unsigned short ccsid,
+                          const char *string, ssize_t inlen,
+                          size_t *outlen);
+char * libssh2_to_ccsid(LIBSSH2_SESSION *session,
+                        libssh2_string_cache **cache,
+                        unsigned short ccsid,
+                        const char *string, ssize_t inlen,
+                        size_t *outlen);
+
+where:
+    session      is a libssh2 session used for memory allocation.
+    cache        is the address of a string cache.
+    ccsid        is the external (i.e.: non libssh2) coded character set id.
+                 65535 means no conversion and 0 means the current job's CCSID.
+    string       is the string to convert.
+    inlen        is the source string length in bytes: set to -1 if
+                 null-terminated.
+    outlen       if not NULL, is the address of a variable that will receive
+                 the transcoded string length upon return.
+
+  libssh2_from_ccsid() transcodes the string from the given CCSID to libssh2
+internal encoding (UTF-8). It is intended to be used to convert API input
+parameters.
+  libssh2_to_ccsid() transcodes the string from libssh2 internal encoding
+(UTF-8) to the given CCSID. This has been implemented to get standard API
+string results in a program's native encoding.
+
+  Both these functions return a pointer to the null-terminated converted string,
+or NULL if an error occurred. In addition, the variable pointed by outlen
+receives the effective byte length of the (cached) translated string, or -1
+in case of error.
+
+
+
+ILE/RPG support:
+
+  Since 95% of the OS/400 programmers use ILE/RPG exclusively, a definition
+  /INCLUDE member is provided for this language. To include libssh2
+  definitions in an ILE/RPG module, line
+
+     h bnddir('LIBSSH2/LIBSSH2')
+
+must figure in the program header, and line
+
+     d/include libssh2/libssh2rpg,libssh2
+
+in the global data section of the module's source code.
+If required, members ssh2_sftp, ssh2_pkey and ssh2_ccsid may also be included.
+
+For IFS source compilations, include members are located in directory
+/libssh2/include/libssh2rpg and have their original names retained.
+
+ILE/RPG lacks a serious macro preprocessor, thus C macros requiring this
+feature have not been translated. However, function-like C macros have been
+implemented as procedures and therefore supported in ILE/RPG.
--- a/os400/ccsid.c
+++ b/os400/ccsid.c
@@ -0,0 +1,252 @@
+/*
+ * Copyright (C) 2015 Patrick Monnerat, D+H <patrick.monnerat@dh.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+/* Character encoding wrappers. */
+
+#include "libssh2_priv.h"
+#include "libssh2_ccsid.h"
+
+#include <qtqiconv.h>
+#include <iconv.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+
+
+#define CCSID_UTF8      1208
+#define CCSID_UTF16BE   13488
+#define STRING_GRANULE  256
+#define MAX_CHAR_SIZE   4
+
+#define OFFSET_OF(t, f) ((size_t) ((char *) &((t *) 0)->f - (char *) 0))
+
+
+struct _libssh2_string_cache {
+    libssh2_string_cache *  next;
+    char                    string[1];
+};
+
+
+static const QtqCode_T  utf8code = { CCSID_UTF8 };
+
+
+static ssize_t
+terminator_size(unsigned short ccsid)
+{
+    QtqCode_T outcode;
+    iconv_t cd;
+    char *inp;
+    char *outp;
+    size_t ilen;
+    size_t olen;
+    char buf[MAX_CHAR_SIZE];
+
+    /* Return the null-terminator size for the given CCSID. */
+
+    /* Fast check usual CCSIDs. */
+    switch (ccsid) {
+    case CCSID_UTF8:
+    case 0:                                 /* Job CCSID is SBCS EBCDIC. */
+        return 1;
+    case CCSID_UTF16BE:
+        return 2;
+    }
+
+    /* Convert an UTF-8 NUL to the target CCSID: use the converted size as
+       result. */
+    memset((void *) &outcode, 0, sizeof outcode);
+    outcode.CCSID = ccsid;
+    cd = QtqIconvOpen(&outcode, (QtqCode_T *) &utf8code);
+    if (cd.return_value == -1)
+        return -1;
+    inp = "";
+    ilen = 1;
+    outp = buf;
+    olen = sizeof buf;
+    iconv(cd, &inp, &ilen, &outp, &olen);
+    iconv_close(cd);
+    olen = sizeof buf - olen;
+    return olen? olen: -1;
+}
+
+static char *
+convert_ccsid(LIBSSH2_SESSION *session, libssh2_string_cache **cache,
+              unsigned short outccsid, unsigned short inccsid,
+              const char *instring, ssize_t inlen, size_t *outlen)
+{
+    char *inp;
+    char *outp;
+    size_t olen;
+    size_t ilen;
+    size_t buflen;
+    size_t curlen;
+    ssize_t termsize;
+    int i;
+    char *dst;
+    libssh2_string_cache *outstring;
+    QtqCode_T incode;
+    QtqCode_T outcode;
+    iconv_t cd;
+
+    if (!instring) {
+        if (outlen)
+            *outlen = 0;
+        return NULL;
+    }
+    if (outlen)
+        *outlen = -1;
+    if (!session || !cache)
+        return NULL;
+
+    /* Get terminator size. */
+    termsize = terminator_size(outccsid);
+    if (termsize < 0)
+        return NULL;
+ 
+    /* Prepare conversion parameters. */
+    memset((void *) &incode, 0, sizeof incode);
+    memset((void *) &outcode, 0, sizeof outcode);
+    incode.CCSID = inccsid;
+    outcode.CCSID = outccsid;
+    curlen = OFFSET_OF(libssh2_string_cache, string);
+    inp = (char *) instring;
+    ilen = inlen;
+    buflen = inlen + curlen;
+    if (inlen < 0) {
+        incode.length_option = 1;
+        buflen = STRING_GRANULE;
+        ilen = 0;
+    }
+
+    /* Allocate output string buffer and open conversion descriptor. */
+    dst = LIBSSH2_ALLOC(session, buflen + termsize);
+    if (!dst)
+        return NULL;
+    cd = QtqIconvOpen(&outcode, &incode);
+    if (cd.return_value == -1) {
+        LIBSSH2_FREE(session, (char *) dst);
+        return NULL;
+    }
+
+    /* Convert string. */
+    for (;;) {
+        outp = dst + curlen;
+        olen = buflen - curlen;
+        i = iconv(cd, &inp, &ilen, &outp, &olen);
+        if (inlen < 0 && olen == buflen - curlen) {
+            /* Special case: converted 0-length (sub)strings do not store the
+               terminator. */
+            if (termsize) {
+                memset(outp, 0, termsize);
+                olen -= termsize;
+            }
+        }
+        curlen = buflen - olen;
+        if (i >= 0 || errno != E2BIG)
+            break;
+        /* Must expand buffer. */
+        buflen += STRING_GRANULE;
+        outp = LIBSSH2_REALLOC(session, dst, buflen + termsize);
+        if (!outp)
+            break;
+        dst = outp;
+    }
+
+    iconv_close(cd);
+
+    /* Check for error. */
+    if (i < 0 || !outp) {
+        LIBSSH2_FREE(session, dst);
+        return NULL;
+    }
+
+    /* Process terminator. */
+    if (inlen < 0)
+        curlen -= termsize;
+    else if (termsize)
+        memset(dst + curlen, 0, termsize);
+
+    /* Shorten buffer if possible. */
+    if (curlen < buflen)
+        dst = LIBSSH2_REALLOC(session, dst, curlen + termsize);
+
+    /* Link to cache. */
+    outstring = (libssh2_string_cache *) dst;
+    outstring->next = *cache;
+    *cache = outstring;
+
+    /* Return length if required. */
+    if (outlen)
+        *outlen = curlen - OFFSET_OF(libssh2_string_cache, string);
+
+    return outstring->string;
+}
+
+LIBSSH2_API char *
+libssh2_from_ccsid(LIBSSH2_SESSION *session, libssh2_string_cache **cache,
+                   unsigned short ccsid, const char *string, ssize_t inlen,
+                   size_t *outlen)
+{
+    return convert_ccsid(session, cache,
+                         CCSID_UTF8, ccsid, string, inlen, outlen);
+}
+
+LIBSSH2_API char *
+libssh2_to_ccsid(LIBSSH2_SESSION *session, libssh2_string_cache **cache,
+                 unsigned short ccsid, const char *string, ssize_t inlen,
+                 size_t *outlen)
+{
+    return convert_ccsid(session, cache,
+                         ccsid, CCSID_UTF8, string, inlen, outlen);
+}
+
+LIBSSH2_API void
+libssh2_release_string_cache(LIBSSH2_SESSION *session,
+                             libssh2_string_cache **cache)
+{
+    libssh2_string_cache *p;
+
+    if (session && cache)
+        while ((p = *cache)) {
+            *cache = p->next;
+            LIBSSH2_FREE(session, (char *) p);
+        }
+}
+
+/* vim: set expandtab ts=4 sw=4: */
--- a/os400/include/alloca.h
+++ b/os400/include/alloca.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2015 Patrick Monnerat, D+H <patrick.monnerat@dh.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+#ifndef LIBSSH2_ALLOCA_H
+#define LIBSSH2_ALLOCA_H
+
+/* alloca() emulation. */
+
+#include <modasa.mih>
+
+#define alloca(n)       _MODASA(n)
+
+#endif
+
+/* vim: set expandtab ts=4 sw=4: */
--- a/os400/include/stdio.h
+++ b/os400/include/stdio.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2015 Patrick Monnerat, D+H <patrick.monnerat@dh.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+#ifndef LIBSSH2_STDIO_H
+#define LIBSSH2_STDIO_H
+
+/*
+ *  <stdio.h> wrapper.
+ *  Its goal is to redefine snprintf/vsnprintf which are not supported by QADRT.
+ */
+
+#include <qadrt.h>
+
+#if __ILEC400_TGTVRM__ >= 710
+# include_next <stdio.h>
+#elif __ILEC400_TGTVRM__ >= 510
+# ifndef __SRCSTMF__
+#  include <QADRT/h/stdio>
+# else
+#  include </QIBM/ProdData/qadrt/include/stdio.h>
+# endif
+#endif
+
+extern int  _libssh2_os400_vsnprintf(char *dst, size_t len,
+                                     const char *fmt, va_list args);
+extern int  _libssh2_os400_snprintf(char *dst, size_t len,
+                                    const char *fmt, ...);
+
+#ifndef LIBSSH2_DISABLE_QADRT_EXT
+# define vsnprintf(dst, len, fmt, args)                                     \
+                        _libssh2_os400_vsnprintf((dst), (len), (fmt), (args))
+# define snprintf       _libssh2_os400_snprintf
+#endif
+
+#endif
+
+/* vim: set expandtab ts=4 sw=4: */
--- a/os400/include/sys/socket.h
+++ b/os400/include/sys/socket.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2015 Patrick Monnerat, D+H <patrick.monnerat@dh.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+#ifndef LIBSSH2_SYS_SOCKET_H
+#define LIBSSH2_SYS_SOCKET_H
+
+/*
+ *  <sys/socket.h> wrapper.
+ *  Redefines connect().
+ */
+
+#include <qadrt.h>
+
+#ifndef _QADRT_LT
+# define _QADRT_LT <
+#endif
+#ifndef _QADRT_GT
+# define _QADRT_GT >
+#endif
+
+#ifdef QADRT_SYSINC
+# include _QADRT_LT QADRT_SYSINC/sys/socket.h _QADRT_GT
+#elif __ILEC400_TGTVRM__ >= 710
+# include_next <sys/socket.h>
+#elif !defined(__SRCSTMF__)
+# include <QSYSINC/sys/socket>
+#else
+# include </QIBM/include/sys/socket.h>
+#endif
+
+extern int  _libssh2_os400_connect(int sd,
+                                   struct sockaddr * destaddr, int addrlen);
+
+#ifndef LIBSSH2_DISABLE_QADRT_EXT
+#define connect(sd, addr, len)  _libssh2_os400_connect((sd), (addr), (len))
+#endif
+
+#endif
+
+/* vim: set expandtab ts=4 sw=4: */
--- a/os400/initscript.sh
+++ b/os400/initscript.sh
@@ -0,0 +1,243 @@
+#!/bin/sh
+
+
+setenv()
+
+{
+        #       Define and export.
+
+        eval ${1}="${2}"
+        export ${1}
+}
+
+
+case "${SCRIPTDIR}" in
+/*)     ;;
+*)      SCRIPTDIR="`pwd`/${SCRIPTDIR}"
+esac
+
+while true
+do      case "${SCRIPTDIR}" in
+        */.)    SCRIPTDIR="${SCRIPTDIR%/.}";;
+        *)      break;;
+        esac
+done
+
+#  The script directory is supposed to be in $TOPDIR/os400.
+
+TOPDIR=`dirname "${SCRIPTDIR}"`
+export SCRIPTDIR TOPDIR
+
+#  Extract the SONAME from the library makefile.
+
+SONAME=`sed -e '/^VERSION=/!d' -e 's/^.* \([0-9]*\):.*$/\1/' -e 'q'     \
+                                                < "${TOPDIR}/src/Makefile.am"`
+export SONAME
+
+
+################################################################################
+#
+#                       Tunable configuration parameters.
+#
+################################################################################
+
+setenv TARGETLIB        'LIBSSH2'               # Target OS/400 program library.
+setenv STATBNDDIR       'LIBSSH2_A'             # Static binding directory.
+setenv DYNBNDDIR        'LIBSSH2'               # Dynamic binding directory.
+setenv SRVPGM           "LIBSSH2.${SONAME}"     # Service program.
+setenv TGTCCSID         '500'                   # Target CCSID of objects.
+setenv DEBUG            '*ALL'                  # Debug level.
+setenv OPTIMIZE         '10'                    # Optimisation level
+setenv OUTPUT           '*NONE'                 # Compilation output option.
+setenv TGTRLS           'V6R1M0'                # Target OS release.
+setenv IFSDIR           '/libssh2'              # Installation IFS directory.
+
+#       Define ZLIB availability and locations.
+
+setenv WITH_ZLIB        0                       # Define to 1 to enable.
+setenv ZLIB_INCLUDE     '/zlib/include'         # ZLIB include IFS directory.
+setenv ZLIB_LIB         'ZLIB'                  # ZLIB library.
+setenv ZLIB_BNDDIR      'ZLIB_A'                # ZLIB binding directory.
+
+
+################################################################################
+
+#       Need to get the version definitions.
+
+LIBSSH2_VERSION=`grep '^#define  *LIBSSH2_VERSION '                     \
+                        "${TOPDIR}/include/libssh2.h"                   |
+                sed 's/.*"\(.*\)".*/\1/'`
+LIBSSH2_VERSION_MAJOR=`grep '^#define  *LIBSSH2_VERSION_MAJOR '         \
+                        "${TOPDIR}/include/libssh2.h"                   |
+                sed 's/^#define  *LIBSSH2_VERSION_MAJOR  *\([^ ]*\).*/\1/'`
+LIBSSH2_VERSION_MINOR=`grep '^#define  *LIBSSH2_VERSION_MINOR '         \
+                        "${TOPDIR}/include/libssh2.h"                   |
+                sed 's/^#define  *LIBSSH2_VERSION_MINOR  *\([^ ]*\).*/\1/'`
+LIBSSH2_VERSION_PATCH=`grep '^#define  *LIBSSH2_VERSION_PATCH '         \
+                        "${TOPDIR}/include/libssh2.h"                   |
+                sed 's/^#define  *LIBSSH2_VERSION_PATCH  *\([^ ]*\).*/\1/'`
+LIBSSH2_VERSION_NUM=`grep '^#define  *LIBSSH2_VERSION_NUM '             \
+                        "${TOPDIR}/include/libssh2.h"                   |
+                sed 's/^#define  *LIBSSH2_VERSION_NUM  *0x\([^ ]*\).*/\1/'`
+LIBSSH2_TIMESTAMP=`grep '^#define  *LIBSSH2_TIMESTAMP '                 \
+                        "${TOPDIR}/include/libssh2.h"                   |
+                sed 's/.*"\(.*\)".*/\1/'`
+export LIBSSH2_VERSION
+export LIBSSH2_VERSION_MAJOR LIBSSH2_VERSION_MINOR LIBSSH2_VERSION_PATCH
+export LIBSSH2_VERSION_NUM LIBSSH2_TIMESTAMP
+
+################################################################################
+#
+#                       OS/400 specific definitions.
+#
+################################################################################
+
+LIBIFSNAME="/QSYS.LIB/${TARGETLIB}.LIB"
+
+
+################################################################################
+#
+#                               Procedures.
+#
+################################################################################
+
+#       action_needed dest [src]
+#
+#       dest is an object to build
+#       if specified, src is an object on which dest depends.
+#
+#       exit 0 (succeeds) if some action has to be taken, else 1.
+
+action_needed()
+
+{
+        [ ! -e "${1}" ] && return 0
+        [ "${2}" ] || return 1
+        [ "${1}" -ot "${2}" ] && return 0
+        return 1
+}
+
+
+#       canonicalize_path path
+#
+#       Return canonicalized path as:
+#       - Absolute
+#       - No . or .. component.
+
+canonicalize_path()
+
+{
+        if expr "${1}" : '^/' > /dev/null
+        then    P="${1}"
+        else    P="`pwd`/${1}"
+        fi
+
+        R=
+        IFSSAVE="${IFS}"
+        IFS="/"
+
+        for C in ${P}
+        do      IFS="${IFSSAVE}"
+                case "${C}" in
+                .)      ;;
+                ..)     R=`expr "${R}" : '^\(.*/\)..*'`
+                        ;;
+                ?*)     R="${R}${C}/"
+                        ;;
+                *)      ;;
+                esac
+        done
+
+        IFS="${IFSSAVE}"
+        echo "/`expr "${R}" : '^\(.*\)/'`"
+}
+
+
+#       make_module module_name source_name [additional_definitions]
+#
+#       Compile source name into ASCII module if needed.
+#       As side effect, append the module name to variable MODULES.
+#       Set LINK to "YES" if the module has been compiled.
+
+make_module()
+
+{
+        MODULES="${MODULES} ${1}"
+        MODIFSNAME="${LIBIFSNAME}/${1}.MODULE"
+        action_needed "${MODIFSNAME}" "${2}" || return 0;
+        SRCDIR=`dirname \`canonicalize_path "${2}"\``
+
+        #       #pragma convert has to be in the source file itself, i.e.
+        #               putting it in an include file makes it only active
+        #               for that include file.
+        #       Thus we build a temporary file with the pragma prepended to
+        #               the source file and we compile that temporary file.
+
+        echo "#line 1 \"${2}\"" > __tmpsrcf.c
+        echo "#pragma convert(819)" >> __tmpsrcf.c
+        echo "#line 1" >> __tmpsrcf.c
+        cat "${2}" >> __tmpsrcf.c
+        CMD="CRTCMOD MODULE(${TARGETLIB}/${1}) SRCSTMF('__tmpsrcf.c')"
+#       CMD="${CMD} SYSIFCOPT(*IFS64IO) OPTION(*INCDIRFIRST *SHOWINC *SHOWSYS)"
+        CMD="${CMD} SYSIFCOPT(*IFS64IO) OPTION(*INCDIRFIRST)"
+        CMD="${CMD} LOCALETYPE(*LOCALE) FLAG(10)"
+        CMD="${CMD} INCDIR('${TOPDIR}/os400/include'"
+        CMD="${CMD} '/QIBM/ProdData/qadrt/include' '${TOPDIR}/include'"
+        CMD="${CMD} '${TOPDIR}/os400' '${SRCDIR}'"
+
+        if [ "${WITH_ZLIB}" != "0" ]
+        then    CMD="${CMD} '${ZLIB_INCLUDE}'"
+        fi
+
+        CMD="${CMD} ${INCLUDES})"
+        CMD="${CMD} TGTCCSID(${TGTCCSID}) TGTRLS(${TGTRLS})"
+        CMD="${CMD} OUTPUT(${OUTPUT})"
+        CMD="${CMD} OPTIMIZE(${OPTIMIZE})"
+        CMD="${CMD} DBGVIEW(${DEBUG})"
+
+        DEFINES="${3}"
+
+        if [ "${WITH_ZLIB}" != "0" ]
+        then    DEFINES="${DEFINES} HAVE_LIBZ LIBSSH2_HAVE_ZLIB"
+        fi
+
+        if [ "${DEFINES}" ]
+        then    CMD="${CMD} DEFINE(${DEFINES})"
+        fi
+
+        system "${CMD}"
+        rm -f __tmpsrcf.c
+        LINK=YES
+}
+
+
+#       Determine DB2 object name from IFS name.
+
+db2_name()
+
+{
+        if [ "${2}" = 'nomangle' ]
+        then    basename "${1}"                                         |
+                tr 'a-z-' 'A-Z_'                                        |
+                sed -e 's/\..*//;s/^\(.\).*\(.........\)$/\1\2/'
+        else    basename "${1}"                                         |
+                tr 'a-z-' 'A-Z_'                                        |
+                sed -e 's/\..*//;s/^LIBSSH2_/SSH2_/'                    \
+                    -e 's/^\(.\).*\(.........\)$/\1\2/'                 \
+                    -e 's/^SPUBLICKEY$/SSH2_PKEY/'
+        fi
+}
+
+
+#       Copy stream replacing version info.
+
+versioned_copy()
+
+{
+        sed -e "s/@LIBSSH2_VERSION@/${LIBSSH2_VERSION}/g"               \
+            -e "s/@LIBSSH2_VERSION_MAJOR@/${LIBSSH2_VERSION_MAJOR}/g"   \
+            -e "s/@LIBSSH2_VERSION_MINOR@/${LIBSSH2_VERSION_MINOR}/g"   \
+            -e "s/@LIBSSH2_VERSION_PATCH@/${LIBSSH2_VERSION_PATCH}/g"   \
+            -e "s/@LIBSSH2_VERSION_NUM@/${LIBSSH2_VERSION_NUM}/g"       \
+            -e "s/@LIBSSH2_TIMESTAMP@/${LIBSSH2_TIMESTAMP}/g"
+}
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Christoph M. Becker	60401ec4c2	Vanilla libssh2 1.10.0 Build with CMake.	2021-11-01 22:33:32 +01:00
Christoph M. Becker	c9d9ea4f2d	Update VS solutions	2020-01-23 16:29:18 +01:00
Christoph M. Becker	660faf6946	Upgrade to libssh2 1.9.0	2020-01-23 15:57:35 +01:00
Christoph M. Becker	314c2127c2	Add vs16 solution	2019-05-17 14:12:19 +02:00
Christoph M. Becker	6b93b1a5ab	Update to unmodified libssh2 1.8.2	2019-03-26 11:34:37 +01:00
Christoph M. Becker	40fd51727e	Update README.md	2019-03-26 11:22:54 +01:00
Christoph M. Becker	557e55cd59	Update to libssh2 1.8.1	2019-03-20 10:02:45 +01:00
Anatol Belski	8dc8fa5e1f	converted projects to vc15 and switched openssl 1.1 lib names	2017-03-09 18:25:14 +01:00
Anatol Belski	f93d744e98	initial add vc15 probjects	2017-03-09 18:20:15 +01:00
Anatol Belski (HvS)	15f0a3a1f0	fix zlib lib names	2016-11-02 16:44:53 +01:00
Anatol Belski	29ad98fd94	upgrade to libssh2-1.8.0	2016-11-02 12:03:13 +01:00
Anatol Belski	c4da10e055	upgraded to libssh2-1.7.0	2016-02-23 16:05:21 +01:00