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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/sha256_generic.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/sha256_generic.c')
| -rw-r--r-- | crypto/sha256_generic.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c index 78431163ed3c..8f9c47e1a96e 100644 --- a/crypto/sha256_generic.c +++ b/crypto/sha256_generic.c @@ -27,6 +27,22 @@ #include <asm/byteorder.h> #include <asm/unaligned.h> +const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = { + 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47, + 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2, + 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4, + 0x2f +}; +EXPORT_SYMBOL_GPL(sha224_zero_message_hash); + +const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = { + 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, + 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, + 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, + 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 +}; +EXPORT_SYMBOL_GPL(sha256_zero_message_hash); + static inline u32 Ch(u32 x, u32 y, u32 z) { return z ^ (x & (y ^ z)); |