/*  $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 */