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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 | afd2d69869c095d5790bf25b259782f6f5377b94 (patch) | |
| tree | 8596f52c886e8341f89b84a6649e8bacb90547a9 /crypto/md5.c | |
| parent | 82a00f55e7a23f92c870a44f477c7aa3c35c16d5 (diff) | |
| download | linux-crypto-afd2d69869c095d5790bf25b259782f6f5377b94.tar.gz linux-crypto-afd2d69869c095d5790bf25b259782f6f5377b94.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 33d17e9a..2355a7c2 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) { |