From f69f207490dd25b89380c21e816b1f6644a7529f Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Mon, 26 Nov 2018 13:00:28 +0100 Subject: [PATCH] libbb: add comment on sha384 Signed-off-by: Denys Vlasenko --- libbb/hash_md5_sha.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c index a53a382ce..9db79ea8b 100644 --- a/libbb/hash_md5_sha.c +++ b/libbb/hash_md5_sha.c @@ -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)