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-This local copy of a SHA1 implementation based on the sources below.
-
-Why:
- - Some libraries suffer from race condition and other issues. For example see
-commit ade3108bb5b0 ("util: Fix race condition on libgcrypt initialization").
-
- - Fold the handling and detection of _eight_ implementations at configure
-stage and _seven_ different codepaths.
-
- - Have a single, uniform, code used by developers, testers and users.
-
- - Avoid conflicts when using software which ships with it's own SHA1 library.
-The latter of which conflicting with the one mesa is build against.
-
-
-
-Source:
-The SHA1 implementation is copied verbatim from the following links.
-At the time of checkout HEAD is 1.25 and 1.24 respectively.
-
-http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/lib/libc/hash/sha1.c?rev=HEAD
-http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/include/sha1.h?rev=HEAD
-
-
-Notes:
- - The files should not have any local changes. If there are any they should be
-clearly documented below and one should aim to upstream them where possible.
-
- - Files will be periodically syncronised with the respective upstream sources.
-Updates will be made regularly, but since the code is _not_ aimed as a
-cryptography solution any issues found should not be considered security ones.
-
-
-Local changes:
- - Removed __bounded__ attribute qualifiers. Unavailable on platforms targeted
-by Mesa. Upstream status: TBD (N/A ?)
-
- - Pick the sha1.h header from the current folder, by using "" over <> in the
-include directive. Upstream status: TBD
-
- - Remove unused function prototypes - SHA1End, SHA1File, SHA1FileChunk and
-SHA1Data. Upstream status: TBD
-
- - Use stdint.h integer types - u_int{8,16,32}_t -> uint{8,16,32}_t and
-u_int -> uint32_t, change header include. Upstream status: TBD
-
- - Revert sha1.c rev 1.26 change (introduce DEF_WEAK).
-Upstream status: TBD (N/A ?)
-
- - Add stdint.h include in sha1.h for uint*_t types. Upstream status: TBD
-
- - Add stddef.h include in sha1.h for size_t type. Upstream status: TBD
-
- - Use memset over explicit_bzero, since memset_s once isn't widely available.
-Upstream status: TBD (N/A ?)
-
- - Manually expand __BEGIN_DECLS/__END_DECLS and make sure that they include
-the struct declaration.
-Upstream status: TBD
-
- - Add non-typedef struct name.
-Upstream status: TBD