Function md5_update

lib/md5.c:157–198

#endif

void md5_update(md_context *ctx, const uchar *input, uint32 length)
{
	uint32 left, fill;

	if (!length)
		return;

	left = ctx->totalN & 0x3F;
	fill = CSUM_CHUNK - left;

	ctx->totalN += length;
	ctx->totalN &= 0xFFFFFFFF;

	if (ctx->totalN < length)
		ctx->totalN2++;

	if (left && length >= fill) {
		memcpy(ctx->buffer + left, input, fill);
		md5_process(ctx, ctx->buffer);
		length -= fill;
		input  += fill;
		left = 0;
	}

#ifdef USE_MD5_ASM /* { */
	if (length >= CSUM_CHUNK) {
		uint32 chunks = length / CSUM_CHUNK;
		md5_process_asm(ctx, input, chunks);
		length -= chunks * CSUM_CHUNK;
		input += chunks * CSUM_CHUNK;
	}
#else /* } { */
	while (length >= CSUM_CHUNK) {
		md5_process(ctx, input);
		length -= CSUM_CHUNK;
		input  += CSUM_CHUNK;
	}
#endif /* } */

	if (length)
		memcpy(ctx->buffer + left, input, length);
}

static const uchar md5_padding[CSUM_CHUNK] = { 0x80 };