crypto/external/bsd/heimdal/dist/lib/gssapi/mech/gss_oid_equal.c

   1 /*      $NetBSD: gss_oid_equal.c,v 1.1.1.2 2014/04/24 12:45:29 pettai Exp $     */
   2
   3 /*
   4  * Copyright (c) 2006 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "mech_locl.h"
  37
  38 /**
  39  * Compare two GSS-API OIDs with each other.
  40  *
  41  * GSS_C_NO_OID matches nothing, not even it-self.
  42  *
  43  * @param a first oid to compare
  44  * @param b second oid to compare
  45  *
  46  * @return non-zero when both oid are the same OID, zero when they are
  47  *         not the same.
  48  *
  49  * @ingroup gssapi
  50  */
  51
  52 GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL
  53 gss_oid_equal(gss_const_OID a, gss_const_OID b)
  54 {
  55     if (a == b && a != GSS_C_NO_OID)
  56         return 1;
  57     if (a == GSS_C_NO_OID || b == GSS_C_NO_OID || a->length != b->length)
  58         return 0;
  59     return memcmp(a->elements, b->elements, a->length) == 0;
  60 }