Function sha_final

src/common/sha.cpp:298–342

// finish computing the SHA digest

void sha_final(unsigned char digest[SHA_DIGESTSIZE], SHA_INFO *sha_info)
{
	const Sha1::LONG lo_bit_count = sha_info->count_lo;
	const Sha1::LONG hi_bit_count = sha_info->count_hi;
	unsigned int count = (int) ((lo_bit_count >> 3) & 0x3f);
	sha_info->data[count++] = 0x80;
	if (count > SHA_BLOCKSIZE - 8)
	{
		memset(sha_info->data + count, 0, SHA_BLOCKSIZE - count);
		sha_transform(sha_info);
		memset(sha_info->data, 0, SHA_BLOCKSIZE - 8);
	}
	else {
		memset(sha_info->data + count, 0, SHA_BLOCKSIZE - 8 - count);
	}
	sha_info->data[56] = (unsigned char) ((hi_bit_count >> 24) & 0xff);
	sha_info->data[57] = (unsigned char) ((hi_bit_count >> 16) & 0xff);
		sha_info->data[58] = (unsigned char) ((hi_bit_count >>  8) & 0xff);
	sha_info->data[59] = (unsigned char) ((hi_bit_count >>  0) & 0xff);
	sha_info->data[60] = (unsigned char) ((lo_bit_count >> 24) & 0xff);
	sha_info->data[61] = (unsigned char) ((lo_bit_count >> 16) & 0xff);
	sha_info->data[62] = (unsigned char) ((lo_bit_count >>  8) & 0xff);
	sha_info->data[63] = (unsigned char) ((lo_bit_count >>  0) & 0xff);
	sha_transform(sha_info);
	digest[ 0] = (unsigned char) ((sha_info->digest[0] >> 24) & 0xff);
	digest[ 1] = (unsigned char) ((sha_info->digest[0] >> 16) & 0xff);
	digest[ 2] = (unsigned char) ((sha_info->digest[0] >>  8) & 0xff);
	digest[ 3] = (unsigned char) ((sha_info->digest[0]      ) & 0xff);
	digest[ 4] = (unsigned char) ((sha_info->digest[1] >> 24) & 0xff);
	digest[ 5] = (unsigned char) ((sha_info->digest[1] >> 16) & 0xff);
	digest[ 6] = (unsigned char) ((sha_info->digest[1] >>  8) & 0xff);
	digest[ 7] = (unsigned char) ((sha_info->digest[1]      ) & 0xff);
	digest[ 8] = (unsigned char) ((sha_info->digest[2] >> 24) & 0xff);
	digest[ 9] = (unsigned char) ((sha_info->digest[2] >> 16) & 0xff);
	digest[10] = (unsigned char) ((sha_info->digest[2] >>  8) & 0xff);
	digest[11] = (unsigned char) ((sha_info->digest[2]      ) & 0xff);
	digest[12] = (unsigned char) ((sha_info->digest[3] >> 24) & 0xff);
	digest[13] = (unsigned char) ((sha_info->digest[3] >> 16) & 0xff);
	digest[14] = (unsigned char) ((sha_info->digest[3] >>  8) & 0xff);
	digest[15] = (unsigned char) ((sha_info->digest[3]      ) & 0xff);
	digest[16] = (unsigned char) ((sha_info->digest[4] >> 24) & 0xff);
	digest[17] = (unsigned char) ((sha_info->digest[4] >> 16) & 0xff);
	digest[18] = (unsigned char) ((sha_info->digest[4] >>  8) & 0xff);
	digest[19] = (unsigned char) ((sha_info->digest[4]      ) & 0xff);
}

}	// anonymous namespace