We must not allow to serialize already finalized `HashContext`s, since
the internal context is already freed. Since there is not much point
in serializing finalized `HashContext`s, we just bail out in that case.
Closes GH-8265.
1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier".
3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted.
4. fixed indentation in some files before |
We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.
Of course, zend_bool is retained as an alias.
The implementation bundles the xxHash v0.8.0 release and includes all the variants
- xxh32, 32-bit wide
- xxh64, 64-bit wide
- xxh3, 64-bit wide
- xxh128, 128-bit wide
An initial hash state can be passed through the options arrray. An additional
functionality not targeted in this implementation is the secret support in xxh3
and xxh128. That can be added at a later point.
The serialization for xxh3 and xxh128 should not be implemented, as the
state would contain the secret. Despite the xxHash is a non crypto
algorithm, the secret would be serialized as plain text which would be
insecure.
Closes GH-6524
Signed-off-by: Anatol Belski <ab@php.net>
The concrete need on this change is to support passing an initial seed
to the murmur hash. Passing a custom seed is important in terms of
randomizing the hash function.
The suggested implementation adds a HashTable parameter to all the
init callbacks. Further on, an array with custom arguments is accepted
from `hash` or `hash_init` from the user land. Currently several things
like `hash_hkdf` are not touched, as they don't need passing custom
args.
Some convenience macros have been added to the SHA/MD families of
functions, so the consuming code doesn't have to be changed widely.
Another way to implement this is to add another type of the init that
would accept a HT with arguments. However, that would still require
touching all the context structs in all the algos. That would also
increase the size of those structs. As an init function is called just
once, the way of modifying the existing init callback has been seen
as more preferrable.
Closes GH-6400.
Signed-off-by: Anatol Belski <ab@php.net>
Co-Developed-by: Nikita Popov <nikita.ppv@googlemail.com>
Signed-off-by: Nikita Popov <nikita.ppv@googlemail.com>
Acked-by: Michael Wallner <mike@php.net>
Reviewed-by: Máté Kocsis <kocsismate@woohoolabs.com>
Reviewed-by: Eddie Kohler <ekohler@gmail.com>
The implementation is based on the upstream PMurHash. The following
variants are implemented
- murmur3a, 32-bit hash
- murmur3c, 128-bit hash for x86
- murmur3f, 128-bit hash for x64
The custom seed support is not targeted by this implementation. It will
need a major change to the API, so then custom arguments can be passed
through `hash_init`. For now, the starting hash is always zero.
Fixes bug #68109, closes#6059
Signed-off-by: Anatol Belski <ab@php.net>
Co-Developed-by: Michael Wallner <mike@php.net>
Signed-off-by: Michael Wallner <mike@php.net>
Currently we treat paths with null bytes as a TypeError, which is
incorrect, and rather inconsistent, as we treat empty paths as
ValueError. We do this because the error is generated by zpp and
it's easier to always throw TypeError there.
This changes the zpp implementation to throw a TypeError only if
the type is actually wrong and throw ValueError for null bytes.
The error message is also split accordingly, to be more precise.
Closes GH-6094.
* 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
Previously, the Keccak_HashInstance was separately allocated.
This could cause memory leaks on errors. For instance,
in php_hash_do_hash_hmac, the following code cleans up after
a file read error:
if (n < 0) {
efree(context);
efree(K);
zend_string_release(digest);
RETURN_FALSE;
}
This does not call the context's hash_final operation, which
was the only way to free the separately-allocated Keccak state.
The simplest fix is simply to place the Keccak_HashInstance state
inside the context object. Then it doesn't need to be freed.
As a result, there is no need to call hash_final in the
HashContext destructor: HashContexts cannot contain internally
allocated resources.
This has two advantages: If the string is already lowercase, we
do not need to copy it, and it will hopefully match the interned
string name of the hash, making the comparison more efficient.
This code was actually unused since its introduction, and since at
least the md5 implementation in the core was completely overhauled,
we're dropping the md5 and sha1 related stuff from ext/hash.
The php_stream_read() and php_stream_write() functions now return
an ssize_t value, with negative results indicating failure. Functions
like fread() and fwrite() will return false in that case.
As a special case, EWOULDBLOCK and EAGAIN on non-blocking streams
should not be regarded as error conditions, and be reported as
successful zero-length reads/writes instead. The handling of EINTR
remains unclear and is internally inconsistent (e.g. some code-paths
will automatically retry on EINTR, while some won't).
I'm landing this now to make sure the stream wrapper ops API changes
make it into 7.4 -- however, if the user-facing changes turn out to
be problematic we have the option of clamping negative returns to
zero in php_stream_read() and php_stream_write() to restore the
old behavior in a relatively non-intrusive manner.
The hash extension is always available since PHP-7.4. The symbol
HAVE_HASH_EXT is kept for BC reasons and removed in PHP-8.0.
This patch also removes the PHAR_HASH_OK since it is no longer
relevant.
This variant of crc32 is heavily used by storage systems, such as iSCSI, SCTP,
Btrfs, ext4, and is increasingly being used in API (such as Google Cloud
Storage, and Apache Kafka).
Christoph M. Becker