cleanup, fix some uninitialised variable warnings
[moonshot.git] / mech_eap / 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     *minor = 0;
73
74 cleanup:
75     if (GSS_ERROR(major) && *dataSet != GSS_C_NO_BUFFER_SET) {
76         gss_buffer_set_t set = *dataSet;
77
78         if (set->count != 0)
79             memset(set->elements[0].value, 0, set->elements[0].length);
80         gss_release_buffer_set(&tmpMinor, dataSet);
81     }
82
83     return major;
84 }
85
86 static struct {
87     gss_OID_desc oid;
88     OM_uint32 (*inquire)(OM_uint32 *, const gss_ctx_id_t,
89                          const gss_OID, gss_buffer_set_t *);
90 } inquireCtxOps[] = {
91     {
92         /* GSS_C_INQ_SSPI_SESSION_KEY */
93         { 11, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x05\x05" },
94         inquireSessionKey
95     },
96     {
97         /* GSS_KRB5_EXPORT_LUCID_SEC_CONTEXT + v1 */
98         { 12, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x05\x06\x01" },
99         gssEapExportLucidSecContext
100     },
101 };
102
103 OM_uint32
104 gss_inquire_sec_context_by_oid(OM_uint32 *minor,
105                                const gss_ctx_id_t ctx,
106                                const gss_OID desired_object,
107                                gss_buffer_set_t *data_set)
108 {
109     OM_uint32 major;
110     int i;
111
112     *data_set = GSS_C_NO_BUFFER_SET;
113
114     GSSEAP_MUTEX_LOCK(&ctx->mutex);
115
116     if (!CTX_IS_ESTABLISHED(ctx)) {
117         *minor = GSSEAP_CONTEXT_INCOMPLETE;
118         major = GSS_S_NO_CONTEXT;
119         goto cleanup;
120     }
121
122     major = GSS_S_UNAVAILABLE;
123     *minor = GSSEAP_BAD_CONTEXT_OPTION;
124
125     for (i = 0; i < sizeof(inquireCtxOps) / sizeof(inquireCtxOps[0]); i++) {
126         if (oidEqual(&inquireCtxOps[i].oid, desired_object)) {
127             major = (*inquireCtxOps[i].inquire)(minor, ctx,
128                                                  desired_object, data_set);
129             break;
130         }
131     }
132
133 cleanup:
134     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
135
136     return major;
137 }