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| author | Antoine Tenart <antoine.tenart@bootlin.com> | 2018-05-29 14:13:45 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-06-22 23:03:02 +0800 |
| commit | 30c217ef6411d24b8c8b0478b89335dc2dabe6e8 (patch) | |
| tree | 7505b9dc1f4f7d4a05d221d61c640879b46d1614 | |
| parent | 25bc95510317dc7259299adb786f050617199b42 (diff) | |
| download | linux-30c217ef6411d24b8c8b0478b89335dc2dabe6e8.tar.bz2 | |
crypto: sha512_generic - add a sha512 0-length pre-computed hash
This patch adds the sha512 pre-computed 0-length hash so that device
drivers can use it when an hardware engine does not support computing a
hash from a 0 length input.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/sha512_generic.c | 12 | ||||
| -rw-r--r-- | include/crypto/sha.h | 2 |
2 files changed, 14 insertions, 0 deletions
diff --git a/crypto/sha512_generic.c b/crypto/sha512_generic.c index eba965d18bfc..439723d9273e 100644 --- a/crypto/sha512_generic.c +++ b/crypto/sha512_generic.c @@ -23,6 +23,18 @@ #include <asm/byteorder.h> #include <asm/unaligned.h> +const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE] = { + 0xcf, 0x83, 0xe1, 0x35, 0x7e, 0xef, 0xb8, 0xbd, + 0xf1, 0x54, 0x28, 0x50, 0xd6, 0x6d, 0x80, 0x07, + 0xd6, 0x20, 0xe4, 0x05, 0x0b, 0x57, 0x15, 0xdc, + 0x83, 0xf4, 0xa9, 0x21, 0xd3, 0x6c, 0xe9, 0xce, + 0x47, 0xd0, 0xd1, 0x3c, 0x5d, 0x85, 0xf2, 0xb0, + 0xff, 0x83, 0x18, 0xd2, 0x87, 0x7e, 0xec, 0x2f, + 0x63, 0xb9, 0x31, 0xbd, 0x47, 0x41, 0x7a, 0x81, + 0xa5, 0x38, 0x32, 0x7a, 0xf9, 0x27, 0xda, 0x3e +}; +EXPORT_SYMBOL_GPL(sha512_zero_message_hash); + static inline u64 Ch(u64 x, u64 y, u64 z) { return z ^ (x & (y ^ z)); diff --git a/include/crypto/sha.h b/include/crypto/sha.h index 0555b571dd34..799f071b93df 100644 --- a/include/crypto/sha.h +++ b/include/crypto/sha.h @@ -71,6 +71,8 @@ extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE]; extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE]; +extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE]; + struct sha1_state { u32 state[SHA1_DIGEST_SIZE / 4]; u64 count; |