93ea808446c455d0c069e28ebe2bf51061b03828
[mech_eap.git] / inquire_sec_context_by_oid.c
1 /*
2  * Copyright (c) 2010, JANET(UK)
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  *
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * 3. Neither the name of JANET(UK) nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32
33 #include "gssapiP_eap.h"
34
35 static OM_uint32
36 inquireSessionKey(OM_uint32 *minor,
37                   const gss_ctx_id_t ctx,
38                   const gss_OID desired_object,
39                   gss_buffer_set_t *dataSet)
40 {
41     OM_uint32 major, tmpMinor;
42     unsigned char oidBuf[16];
43     gss_buffer_desc buf;
44     gss_OID_desc oid;
45
46     buf.length = KRB_KEY_LENGTH(&ctx->rfc3961Key);
47     buf.value = KRB_KEY_DATA(&ctx->rfc3961Key);
48
49     major = gss_add_buffer_set_member(minor, &buf, dataSet);
50     if (GSS_ERROR(major))
51         goto cleanup;
52
53     oid.length = sizeof(oidBuf);
54     oid.elements = oidBuf;
55
56     major = composeOid(minor,
57                        "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x04",
58                        10,
59                        ctx->encryptionType,
60                        &oid);
61     if (GSS_ERROR(major))
62         goto cleanup;
63
64     buf.length = oid.length;
65     buf.value = oid.elements;
66
67     major = gss_add_buffer_set_member(minor, &buf, dataSet);
68     if (GSS_ERROR(major))
69         goto cleanup;
70
71     major = GSS_S_COMPLETE;
72
73 cleanup:
74     if (GSS_ERROR(major) && *dataSet != GSS_C_NO_BUFFER_SET) {
75         gss_buffer_set_t set = *dataSet;
76
77         if (set->count != 0)
78             memset(set->elements[0].value, 0, set->elements[0].length);
79         gss_release_buffer_set(&tmpMinor, dataSet);
80     }
81
82     return major;
83 }
84
85 static struct {
86     gss_OID_desc oid;
87     OM_uint32 (*inquire)(OM_uint32 *, const gss_ctx_id_t,
88                          const gss_OID, gss_buffer_set_t *);
89 } inquireCtxOps[] = {
90     {
91         /* GSS_C_INQ_SSPI_SESSION_KEY */
92         { 11, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x05\x05" },
93         inquireSessionKey
94     },
95 };
96
97 OM_uint32
98 gss_inquire_sec_context_by_oid(OM_uint32 *minor,
99                                const gss_ctx_id_t context_handle,
100                                const gss_OID desired_object,
101                                gss_buffer_set_t *data_set)
102 {
103     OM_uint32 major = GSS_S_UNAVAILABLE;
104     int i;
105
106     *data_set = GSS_C_NO_BUFFER_SET;
107
108     for (i = 0; i < sizeof(inquireCtxOps) / sizeof(inquireCtxOps[0]); i++) {
109         if (oidEqual(&inquireCtxOps[i].oid, desired_object)) {
110             major = (*inquireCtxOps[i].inquire)(minor, context_handle,
111                                                  desired_object, data_set);
112             break;
113         }
114     }
115
116     return major;
117 }