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