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| author | LABBE Corentin <clabbe.montjoie@gmail.com> | 2015-12-17 13:45:39 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-12-22 20:43:35 +0800 |
| commit | 0c4c78de0417ced1da92351a3013e631860ea576 (patch) | |
| tree | 1901728828a5891d3a8e1f5db23226682a9bb41d /crypto/md5.c | |
| parent | 51d77dddfff4a554744bfa0e67cf571319635645 (diff) | |
| download | lwn-0c4c78de0417ced1da92351a3013e631860ea576.tar.gz lwn-0c4c78de0417ced1da92351a3013e631860ea576.zip | |
crypto: hash - add zero length message hash for shax and md5
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 <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/md5.c')
| -rw-r--r-- | crypto/md5.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/crypto/md5.c b/crypto/md5.c index 33d17e9a8702..2355a7c25c45 100644 --- a/crypto/md5.c +++ b/crypto/md5.c @@ -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) { |