From f69f207490dd25b89380c21e816b1f6644a7529f Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Mon, 26 Nov 2018 13:00:28 +0100
Subject: libbb: add comment on sha384
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
libbb/hash_md5_sha.c | 5 +++++
1 file changed, 5 insertions(+)
(limited to 'libbb')
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)
--
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