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crypto: hash - add zero length message hash for shax and md5

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Some crypto drivers cannot process empty data message and return a
precalculated hash for md5/sha1/sha224/sha256.

This patch add thoses precalculated hash in include/crypto.

Signed-off-by: LABBE Corentin <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
LABBE Corentin 2015-12-17 13:45:39 +01:00 • committed by Herbert Xu
commit 0c4c78de04
5 changed files with 37 additions and 0 deletions
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6
crypto/md5.c
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@ -24,6 +24,12 @@
#include <linux/cryptohash.h>
#include <asm/byteorder.h>
const u8 md5_zero_message_hash[MD5_DIGEST_SIZE] = {
0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
};
EXPORT_SYMBOL_GPL(md5_zero_message_hash);
/* XXX: this stuff can be optimized */
static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
{