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      1 /*	$NetBSD: gss_decapsulate_token.c,v 1.2 2017/01/28 21:31:46 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2006 Kungliga Tekniska Hgskolan
      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 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
     39 gss_decapsulate_token(gss_const_buffer_t input_token,
     40 		      gss_const_OID oid,
     41 		      gss_buffer_t output_token)
     42 {
     43     GSSAPIContextToken ct;
     44     heim_oid o;
     45     OM_uint32 status;
     46     int ret;
     47     size_t size;
     48 
     49     _mg_buffer_zero(output_token);
     50 
     51     ret = der_get_oid (oid->elements, oid->length, &o, &size);
     52     if (ret)
     53 	return GSS_S_FAILURE;
     54 
     55     ret = decode_GSSAPIContextToken(input_token->value, input_token->length,
     56 				    &ct, NULL);
     57     if (ret) {
     58 	der_free_oid(&o);
     59 	return GSS_S_FAILURE;
     60     }
     61 
     62     if (der_heim_oid_cmp(&ct.thisMech, &o) == 0) {
     63 	status = GSS_S_COMPLETE;
     64 	output_token->value = ct.innerContextToken.data;
     65 	output_token->length = ct.innerContextToken.length;
     66 	der_free_oid(&ct.thisMech);
     67     } else {
     68 	free_GSSAPIContextToken(&ct);
     69  	status = GSS_S_FAILURE;
     70     }
     71     der_free_oid(&o);
     72 
     73     return status;
     74 }
     75