Line | Count | Source |
1 | /* $OpenBSD: timingsafe_bcmp.c,v 1.3 2015/08/31 02:53:57 guenther 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 | #include <string.h> | |
19 | ||
20 | int | |
21 | timingsafe_bcmp(const void *b1, const void *b2, size_t n) | |
22 | 3 | { |
23 | 3 | const unsigned char *p1 = b1, *p2 = b2; |
24 | 3 | int ret = 0; |
25 | ||
26 | 154 | for (; n > 0; n--) |
27 | 151 | ret |= *p1++ ^ *p2++; |
28 | 3 | return (ret != 0); |
29 | 3 | } |