Function MD5Update

freebsd/kern/md5c.c:153–190

(context, in, inputLen)

 */

void
MD5Update (context, in, inputLen)
	MD5_CTX *context;
	const void *in;
	unsigned int inputLen;
{
	unsigned int i, index, partLen;
	const unsigned char *input = in;

	/* Compute number of bytes mod 64 */
	index = (unsigned int)((context->count[0] >> 3) & 0x3F);

	/* Update number of bits */
	if ((context->count[0] += ((u_int32_t)inputLen << 3))
	    < ((u_int32_t)inputLen << 3))
		context->count[1]++;
	context->count[1] += ((u_int32_t)inputLen >> 29);

	partLen = 64 - index;

	/* Transform as many times as possible. */
	if (inputLen >= partLen) {
		memcpy((void *)&context->buffer[index], (const void *)input,
		    partLen);
		MD5Transform (context->state, context->buffer);

		for (i = partLen; i + 63 < inputLen; i += 64)
			MD5Transform (context->state, &input[i]);

		index = 0;
	}
	else
		i = 0;

	/* Buffer remaining input */
	memcpy ((void *)&context->buffer[index], (const void *)&input[i],
	    inputLen-i);
}

/*
 * MD5 padding. Adds padding followed by original length.