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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 */