/*
* SHA: Add data to context.
*/
void
SHA1_Update(SHA1Context *ctx, const unsigned char *dataIn, unsigned int len)
{
register unsigned int lenB;
register unsigned int togo;
if (!len)
return;
/* accumulate the byte count. */
lenB = (unsigned int)(ctx->size) & 63U;
ctx->size += len;
/*
* Read the data into W and process blocks as they get full
*/
if (lenB > 0) {
togo = 64U - lenB;
if (len < togo)
togo = len;
memcpy(ctx->B + lenB, dataIn, togo);
len -= togo;
dataIn += togo;
lenB = (lenB + togo) & 63U;
if (!lenB) {
shaCompress(&ctx->H[H2X], ctx->W);
}
}
#if !defined(HAVE_UNALIGNED_ACCESS)
if ((ptrdiff_t)dataIn % sizeof(PRUint32)) {
while (len >= 64U) {
memcpy(ctx->B, dataIn, 64);
len -= 64U;
shaCompress(&ctx->H[H2X], ctx->W);
dataIn += 64U;
}
} else
#endif
{
while (len >= 64U) {
len -= 64U;
shaCompress(&ctx->H[H2X], (PRUint32 *)dataIn);
dataIn += 64U;
}
}
if (len) {
memcpy(ctx->B, dataIn, len);
}
}
/*
* SHA: Generate hash value from context
*/
void
SHA1_End(SHA1Context *ctx, unsigned char *hashout,
unsigned int *pDigestLen, unsigned int maxDigestLen)
{
register PRUint64 size;
register PRUint32 lenB;
static const unsigned char bulk_pad[64] = { 0x80,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
#define tmp lenB
PORT_Assert (maxDigestLen >= SHA1_LENGTH);
/*
* Pad with a binary 1 (e.g. 0x80), then zeroes, then length in bits
*/
size = ctx->size;
lenB = (PRUint32)size & 63;
SHA1_Update(ctx, bulk_pad, (((55+64) - lenB) & 63) + 1);
PORT_Assert(((PRUint32)ctx->size & 63) == 56);
/* Convert size from bytes to bits. */
size <<= 3;
ctx->W[14] = SHA_HTONL((PRUint32)(size >> 32));
ctx->W[15] = SHA_HTONL((PRUint32)size);
shaCompress(&ctx->H[H2X], ctx->W);
/*
* Output hash
*/
SHA_STORE_RESULT;
*pDigestLen = SHA1_LENGTH;
}
