1218767Sdes/*	$OpenBSD: timingsafe_bcmp.c,v 1.1 2010/09/24 13:33:00 matthew Exp $	*/
2218767Sdes/*
3218767Sdes * Copyright (c) 2010 Damien Miller.  All rights reserved.
4218767Sdes *
5218767Sdes * Permission to use, copy, modify, and distribute this software for any
6218767Sdes * purpose with or without fee is hereby granted, provided that the above
7218767Sdes * copyright notice and this permission notice appear in all copies.
8218767Sdes *
9218767Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10218767Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11218767Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12218767Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13218767Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14218767Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15218767Sdes * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16218767Sdes */
17218767Sdes
18218767Sdes/* OPENBSD ORIGINAL: lib/libc/string/timingsafe_bcmp.c */
19218767Sdes
20218767Sdes#include "includes.h"
21218767Sdes#ifndef HAVE_TIMINGSAFE_BCMP
22218767Sdes
23218767Sdesint
24218767Sdestimingsafe_bcmp(const void *b1, const void *b2, size_t n)
25218767Sdes{
26218767Sdes	const unsigned char *p1 = b1, *p2 = b2;
27218767Sdes	int ret = 0;
28218767Sdes
29218767Sdes	for (; n > 0; n--)
30218767Sdes		ret |= *p1++ ^ *p2++;
31218767Sdes	return (ret != 0);
32218767Sdes}
33218767Sdes
34218767Sdes#endif /* TIMINGSAFE_BCMP */
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