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libbb: add comment on sha384

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-11-26 13:00:28 +01:00
parent d4681c7293
commit f69f207490
1 changed files with 5 additions and 0 deletions
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5
libbb/hash_md5_sha.c
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@ -794,6 +794,11 @@ static const uint32_t init512_lo[] = {
};
#endif /* NEED_SHA512 */
// Note: SHA-384 is identical to SHA-512, except that initial hash values are
// 0xcbbb9d5dc1059ed8, 0x629a292a367cd507, 0x9159015a3070dd17, 0x152fecd8f70e5939,
// 0x67332667ffc00b31, 0x8eb44a8768581511, 0xdb0c2e0d64f98fa7, 0x47b5481dbefa4fa4,
// and the output is constructed by omitting last two 64-bit words of it.
/* Initialize structure containing state of computation.
(FIPS 180-2:5.3.2) */
void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)