Make SHA-512 use the new _gcry_md_block_write helper

* cipher/hash-common.c (_gcry_md_block_write): Check that hd->buf is
large enough.
* cipher/hash-common.h (MD_BLOCK_MAX_BLOCKSIZE, MD_NBLOCKS_TYPE): New
macros.
(gcry_md_block_ctx_t): Use above macros for 'nblocks' and 'buf'.
* cipher/sha512.c (SHA512_STATE): New struct.
(SHA512_CONTEXT): Add 'bctx' and 'state'.
(sha512_init, sha384_init): Initialize 'bctx'.
(__transform, _gcry_sha512_transform_armv7_neon): Use SHA512_STATE for
'hd'.
(transform): For now, do not return burn stack.
(sha512_write): Remove.
(sha512_final): Use _gcry_md_block_write and bctx.
(_gcry_digest_spec_sha512, _gcry_digest_spec_sha384): Use
_gcry_md_block_write.
--

Patch changes 'nblocks' counter to 64-bits when SHA-512 is enabled. This does
not cause problems with other algorithms; they are already casting 'nblocks'
to u32 variable in their finalization functions. Also move 'buf' member to
head of 'gcry_md_block_ctx_t' to ensure proper alignment; this is because some
algorithms cast buffer pointer to (u64*) in final endian conversion.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

0 files changed, 0 insertions, 0 deletions