1/*
2 * Copyright (c) 2006 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "mech_locl.h"
35
36GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
37gss_decapsulate_token(gss_const_buffer_t input_token,
38		      gss_const_OID oid,
39		      gss_buffer_t output_token)
40{
41    GSSAPIContextToken ct;
42    heim_oid o;
43    OM_uint32 status;
44    int ret;
45    size_t size;
46
47    _mg_buffer_zero(output_token);
48
49    ret = der_get_oid (oid->elements, oid->length, &o, &size);
50    if (ret)
51	return GSS_S_FAILURE;
52
53    ret = decode_GSSAPIContextToken(input_token->value, input_token->length,
54				    &ct, NULL);
55    if (ret) {
56	der_free_oid(&o);
57	return GSS_S_FAILURE;
58    }
59
60    if (der_heim_oid_cmp(&ct.thisMech, &o) == 0) {
61	status = GSS_S_COMPLETE;
62	output_token->value = ct.innerContextToken.data;
63	output_token->length = ct.innerContextToken.length;
64	der_free_oid(&ct.thisMech);
65    } else {
66	free_GSSAPIContextToken(&ct);
67 	status = GSS_S_FAILURE;
68    }
69    der_free_oid(&o);
70
71    return status;
72}
73