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1 : : /* $OpenBSD: timingsafe_bcmp.c,v 1.1 2010/09/24 13:33:00 matthew Exp $ */
2 : : /*
3 : : * Copyright (c) 2010 Damien Miller. All rights reserved.
4 : : *
5 : : * Permission to use, copy, modify, and distribute this software for any
6 : : * purpose with or without fee is hereby granted, provided that the above
7 : : * copyright notice and this permission notice appear in all copies.
8 : : *
9 : : * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 : : * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 : : * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 : : * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 : : * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 : : * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 : : * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 : : */
17 : :
18 : : /* OPENBSD ORIGINAL: lib/libc/string/timingsafe_bcmp.c */
19 : :
20 : : #include "includes.h"
21 : : #ifndef HAVE_TIMINGSAFE_BCMP
22 : :
23 : : int
24 : 24879 : timingsafe_bcmp(const void *b1, const void *b2, size_t n)
25 : : {
26 : 24879 : const unsigned char *p1 = b1, *p2 = b2;
27 : 24879 : int ret = 0;
28 : :
29 [ + + ]: 926944 : for (; n > 0; n--)
30 : 902065 : ret |= *p1++ ^ *p2++;
31 : 24879 : return (ret != 0);
32 : : }
33 : :
34 : : #endif /* TIMINGSAFE_BCMP */
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