1 /*
2 * Copyright (c) 2003 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 "gsskrb5_locl.h"
35
_gsskrb5_add_cred(OM_uint32 * minor_status,const gss_cred_id_t input_cred_handle,const gss_name_t desired_name,const gss_OID desired_mech,gss_cred_usage_t cred_usage,OM_uint32 initiator_time_req,OM_uint32 acceptor_time_req,gss_cred_id_t * output_cred_handle,gss_OID_set * actual_mechs,OM_uint32 * initiator_time_rec,OM_uint32 * acceptor_time_rec)36 OM_uint32 GSSAPI_CALLCONV _gsskrb5_add_cred (
37 OM_uint32 *minor_status,
38 const gss_cred_id_t input_cred_handle,
39 const gss_name_t desired_name,
40 const gss_OID desired_mech,
41 gss_cred_usage_t cred_usage,
42 OM_uint32 initiator_time_req,
43 OM_uint32 acceptor_time_req,
44 gss_cred_id_t *output_cred_handle,
45 gss_OID_set *actual_mechs,
46 OM_uint32 *initiator_time_rec,
47 OM_uint32 *acceptor_time_rec)
48 {
49 krb5_context context;
50 OM_uint32 ret, lifetime;
51 gsskrb5_cred cred, handle;
52 krb5_const_principal dname;
53
54 handle = NULL;
55 cred = (gsskrb5_cred)input_cred_handle;
56 dname = (krb5_const_principal)desired_name;
57
58 GSSAPI_KRB5_INIT (&context);
59
60 if (gss_oid_equal(desired_mech, GSS_KRB5_MECHANISM) == 0) {
61 *minor_status = 0;
62 return GSS_S_BAD_MECH;
63 }
64
65 if (cred == NULL && output_cred_handle == NULL) {
66 *minor_status = 0;
67 return GSS_S_NO_CRED;
68 }
69
70 if (cred == NULL) { /* XXX standard conformance failure */
71 *minor_status = 0;
72 return GSS_S_NO_CRED;
73 }
74
75 /* check if requested output usage is compatible with output usage */
76 if (output_cred_handle != NULL) {
77 HEIMDAL_MUTEX_lock(&cred->cred_id_mutex);
78 if (cred->usage != cred_usage && cred->usage != GSS_C_BOTH) {
79 HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
80 *minor_status = GSS_KRB5_S_G_BAD_USAGE;
81 return(GSS_S_FAILURE);
82 }
83 }
84
85 /* check that we have the same name */
86 if (dname != NULL &&
87 krb5_principal_compare(context, dname,
88 cred->principal) != FALSE) {
89 if (output_cred_handle)
90 HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
91 *minor_status = 0;
92 return GSS_S_BAD_NAME;
93 }
94
95 /* make a copy */
96 if (output_cred_handle) {
97 krb5_error_code kret;
98
99 handle = calloc(1, sizeof(*handle));
100 if (handle == NULL) {
101 HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
102 *minor_status = ENOMEM;
103 return (GSS_S_FAILURE);
104 }
105
106 handle->usage = cred_usage;
107 handle->lifetime = cred->lifetime;
108 handle->principal = NULL;
109 handle->keytab = NULL;
110 handle->ccache = NULL;
111 handle->mechanisms = NULL;
112 HEIMDAL_MUTEX_init(&handle->cred_id_mutex);
113
114 ret = GSS_S_FAILURE;
115
116 kret = krb5_copy_principal(context, cred->principal,
117 &handle->principal);
118 if (kret) {
119 HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
120 free(handle);
121 *minor_status = kret;
122 return GSS_S_FAILURE;
123 }
124
125 if (cred->keytab) {
126 char *name = NULL;
127
128 ret = GSS_S_FAILURE;
129
130 kret = krb5_kt_get_full_name(context, cred->keytab, &name);
131 if (kret) {
132 *minor_status = kret;
133 goto failure;
134 }
135
136 kret = krb5_kt_resolve(context, name,
137 &handle->keytab);
138 krb5_xfree(name);
139 if (kret){
140 *minor_status = kret;
141 goto failure;
142 }
143 }
144
145 if (cred->ccache) {
146 const char *type, *name;
147 char *type_name = NULL;
148
149 ret = GSS_S_FAILURE;
150
151 type = krb5_cc_get_type(context, cred->ccache);
152 if (type == NULL){
153 *minor_status = ENOMEM;
154 goto failure;
155 }
156
157 if (strcmp(type, "MEMORY") == 0) {
158 ret = krb5_cc_new_unique(context, type,
159 NULL, &handle->ccache);
160 if (ret) {
161 *minor_status = ret;
162 goto failure;
163 }
164
165 ret = krb5_cc_copy_cache(context, cred->ccache,
166 handle->ccache);
167 if (ret) {
168 *minor_status = ret;
169 goto failure;
170 }
171
172 } else {
173 name = krb5_cc_get_name(context, cred->ccache);
174 if (name == NULL) {
175 *minor_status = ENOMEM;
176 goto failure;
177 }
178
179 kret = asprintf(&type_name, "%s:%s", type, name);
180 if (kret < 0 || type_name == NULL) {
181 *minor_status = ENOMEM;
182 goto failure;
183 }
184
185 kret = krb5_cc_resolve(context, type_name,
186 &handle->ccache);
187 free(type_name);
188 if (kret) {
189 *minor_status = kret;
190 goto failure;
191 }
192 }
193 }
194 ret = gss_create_empty_oid_set(minor_status, &handle->mechanisms);
195 if (ret)
196 goto failure;
197
198 ret = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
199 &handle->mechanisms);
200 if (ret)
201 goto failure;
202 }
203
204 HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
205
206 ret = _gsskrb5_inquire_cred(minor_status, (gss_cred_id_t)cred,
207 NULL, &lifetime, NULL, actual_mechs);
208 if (ret)
209 goto failure;
210
211 if (initiator_time_rec)
212 *initiator_time_rec = lifetime;
213 if (acceptor_time_rec)
214 *acceptor_time_rec = lifetime;
215
216 if (output_cred_handle) {
217 *output_cred_handle = (gss_cred_id_t)handle;
218 }
219
220 *minor_status = 0;
221 return ret;
222
223 failure:
224
225 if (handle) {
226 if (handle->principal)
227 krb5_free_principal(context, handle->principal);
228 if (handle->keytab)
229 krb5_kt_close(context, handle->keytab);
230 if (handle->ccache)
231 krb5_cc_destroy(context, handle->ccache);
232 if (handle->mechanisms)
233 gss_release_oid_set(NULL, &handle->mechanisms);
234 free(handle);
235 }
236 if (output_cred_handle)
237 HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
238 return ret;
239 }
240