int Sha384Update(Sha384* sha384, const byte* data, word32 len)
{
/* do block size increments */
byte* local = (byte*)sha384->buffer;
while (len) {
word32 add = min(len, SHA384_BLOCK_SIZE - sha384->buffLen);
XMEMCPY(&local[sha384->buffLen], data, add);
sha384->buffLen += add;
data += add;
len -= add;
if (sha384->buffLen == SHA384_BLOCK_SIZE) {
int ret;
#ifdef LITTLE_ENDIAN_ORDER
ByteReverseWords64(sha384->buffer, sha384->buffer,
SHA384_BLOCK_SIZE);
#endif
ret = Transform384(sha384);
if (ret != 0)
return ret;
AddLength384(sha384, SHA384_BLOCK_SIZE);
sha384->buffLen = 0;
}
}
return 0;
}
int wc_Sha384Final(Sha384* sha384, byte* hash)
{
byte* local = (byte*)sha384->buffer;
int ret;
AddLength384(sha384, sha384->buffLen); /* before adding pads */
local[sha384->buffLen++] = 0x80; /* add 1 */
/* pad with zeros */
if (sha384->buffLen > SHA384_PAD_SIZE) {
XMEMSET(&local[sha384->buffLen], 0, SHA384_BLOCK_SIZE -sha384->buffLen);
sha384->buffLen += SHA384_BLOCK_SIZE - sha384->buffLen;
#if defined(LITTLE_ENDIAN_ORDER)
ByteReverseWords64(sha384->buffer, sha384->buffer,
SHA384_BLOCK_SIZE);
#endif
ret = _Transform384(sha384);
if (ret != 0)
return ret;
sha384->buffLen = 0;
}
XMEMSET(&local[sha384->buffLen], 0, SHA384_PAD_SIZE - sha384->buffLen);
/* put lengths in bits */
sha384->hiLen = (sha384->loLen >> (8*sizeof(sha384->loLen) - 3)) +
(sha384->hiLen << 3);
sha384->loLen = sha384->loLen << 3;
/* store lengths */
#if defined(LITTLE_ENDIAN_ORDER)
ByteReverseWords64(sha384->buffer, sha384->buffer,
SHA384_BLOCK_SIZE);
#endif
/* ! length ordering dependent on digest endian type ! */
sha384->buffer[SHA384_BLOCK_SIZE / sizeof(word64) - 2] = sha384->hiLen;
sha384->buffer[SHA384_BLOCK_SIZE / sizeof(word64) - 1] = sha384->loLen;
ret = _Transform384(sha384);
if (ret != 0)
return ret;
#ifdef LITTLE_ENDIAN_ORDER
ByteReverseWords64(sha384->digest, sha384->digest, SHA384_DIGEST_SIZE);
#endif
XMEMCPY(hash, sha384->digest, SHA384_DIGEST_SIZE);
return wc_InitSha384(sha384); /* reset state */
}
