11305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* $OpenBSD: timingsafe_bcmp.c,v 1.1 2010/09/24 13:33:00 matthew Exp $ */ 21305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 31305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Copyright (c) 2010 Damien Miller. All rights reserved. 41305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 51305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Permission to use, copy, modify, and distribute this software for any 61305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * purpose with or without fee is hereby granted, provided that the above 71305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * copyright notice and this permission notice appear in all copies. 81305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 91305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* OPENBSD ORIGINAL: lib/libc/string/timingsafe_bcmp.c */ 191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "includes.h" 211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#ifndef HAVE_TIMINGSAFE_BCMP 221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodint 241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodtimingsafe_bcmp(const void *b1, const void *b2, size_t n) 251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood const unsigned char *p1 = b1, *p2 = b2; 271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int ret = 0; 281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (; n > 0; n--) 301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret |= *p1++ ^ *p2++; 311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (ret != 0); 321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#endif /* TIMINGSAFE_BCMP */ 35