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