* Modify php_hash_ops to contain the algorithm name and
serialize and unserialize methods.
* Implement __serialize and __unserialize magic methods on
HashContext.
Note that serialized HashContexts are not necessarily portable
between PHP versions or from architecture to architecture.
(Most are, though Keccak and slow SHA3s are not.)
An exception is thrown when an unsupported serialization is
attempted.
Because of security concerns, HASH_HMAC contexts are not
currently serializable; attempting to serialize one throws
an exception.
Serialization exposes the state of HashContext memory, so ensure
that memory is zeroed before use by allocating it with a new
php_hash_alloc_context function. Performance impact is
negligible.
Some hash internal states have logical pointers into a buffer,
or sponge, that absorbs input provided in bytes rather than
chunks. The unserialize functions for these hash functions
must validate that the logical pointers are all within bounds,
lest future hash operations cause out-of-bounds memory accesses.
* Adler32, CRC32, FNV, joaat: simple state, no buffer positions
* Gost, MD2, SHA3, Snefru, Tiger, Whirlpool: buffer positions
must be validated
* MD4, MD5, SHA1, SHA2, haval, ripemd: buffer positions encoded
bitwise, forced to within bounds on use; no need to validate
The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.
In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.
This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.
(patch by: Alessandro Astarita <aleast@capri.it>) (Derick)
@- Added md5_file(), which calculaties the MD5 sum of a file.
@ (patch by: Alessandro Astarita <aleast@capri.it>) (Derick)
Added a few RCS $Id$ tags.
# Note: I have avoided changing any .h files if the corresponding .c file
# had not already been changed as I am not sure if there are any legal
# issues here. So some extensions still have PHP 3 headers.
sub-directories and started to move extension code into ext/<name>. For now,
I have moved the "standard" extension (which is quite a mix of everything
right now) and the GD extension into their own subdirs in ext/.
The configure script now also runs configure in the libzend directory
automatically and makes sure php4 and libzend use the same config.cache file.
To avoid running configure in libzend, use the --no-recursion option.
"make" in php4 also builds libzend now.
The Apache module doesn't compile right now, but a fix for that is
coming up.
Eddie Kohler