1 /*
2 * Copyright (c) 2004, PADL Software Pty Ltd.
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 PADL Software 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 PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
21 * 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 PADL SOFTWARE 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 "gsskrb5_locl.h"
34
35 static OM_uint32
import_cred(OM_uint32 * minor_status,krb5_context context,gss_cred_id_t * cred_handle,const gss_buffer_t value)36 import_cred(OM_uint32 *minor_status,
37 krb5_context context,
38 gss_cred_id_t *cred_handle,
39 const gss_buffer_t value)
40 {
41 OM_uint32 major_stat;
42 krb5_error_code ret;
43 krb5_principal keytab_principal = NULL;
44 krb5_keytab keytab = NULL;
45 krb5_storage *sp = NULL;
46 krb5_ccache id = NULL;
47 char *str;
48
49 if (cred_handle == NULL || *cred_handle != GSS_C_NO_CREDENTIAL) {
50 *minor_status = 0;
51 return GSS_S_FAILURE;
52 }
53
54 sp = krb5_storage_from_mem(value->value, value->length);
55 if (sp == NULL) {
56 *minor_status = 0;
57 return GSS_S_FAILURE;
58 }
59
60 /* credential cache name */
61 ret = krb5_ret_string(sp, &str);
62 if (ret) {
63 *minor_status = ret;
64 major_stat = GSS_S_FAILURE;
65 goto out;
66 }
67 if (str[0]) {
68 ret = krb5_cc_resolve(context, str, &id);
69 if (ret) {
70 *minor_status = ret;
71 major_stat = GSS_S_FAILURE;
72 goto out;
73 }
74 }
75 free(str);
76 str = NULL;
77
78 /* keytab principal name */
79 ret = krb5_ret_string(sp, &str);
80 if (ret == 0 && str[0])
81 ret = krb5_parse_name(context, str, &keytab_principal);
82 if (ret) {
83 *minor_status = ret;
84 major_stat = GSS_S_FAILURE;
85 goto out;
86 }
87 free(str);
88 str = NULL;
89
90 /* keytab principal */
91 ret = krb5_ret_string(sp, &str);
92 if (ret) {
93 *minor_status = ret;
94 major_stat = GSS_S_FAILURE;
95 goto out;
96 }
97 if (str[0]) {
98 ret = krb5_kt_resolve(context, str, &keytab);
99 if (ret) {
100 *minor_status = ret;
101 major_stat = GSS_S_FAILURE;
102 goto out;
103 }
104 }
105 free(str);
106 str = NULL;
107
108 major_stat = _gsskrb5_krb5_import_cred(minor_status, id, keytab_principal,
109 keytab, cred_handle);
110 out:
111 if (id)
112 krb5_cc_close(context, id);
113 if (keytab_principal)
114 krb5_free_principal(context, keytab_principal);
115 if (keytab)
116 krb5_kt_close(context, keytab);
117 if (str)
118 free(str);
119 if (sp)
120 krb5_storage_free(sp);
121
122 return major_stat;
123 }
124
125
126 static OM_uint32
allowed_enctypes(OM_uint32 * minor_status,krb5_context context,gss_cred_id_t * cred_handle,const gss_buffer_t value)127 allowed_enctypes(OM_uint32 *minor_status,
128 krb5_context context,
129 gss_cred_id_t *cred_handle,
130 const gss_buffer_t value)
131 {
132 OM_uint32 major_stat;
133 krb5_error_code ret;
134 size_t len, i;
135 krb5_enctype *enctypes = NULL;
136 krb5_storage *sp = NULL;
137 gsskrb5_cred cred;
138
139 if (cred_handle == NULL || *cred_handle == GSS_C_NO_CREDENTIAL) {
140 *minor_status = 0;
141 return GSS_S_FAILURE;
142 }
143
144 cred = (gsskrb5_cred)*cred_handle;
145
146 if ((value->length % 4) != 0) {
147 *minor_status = 0;
148 major_stat = GSS_S_FAILURE;
149 goto out;
150 }
151
152 len = value->length / 4;
153 enctypes = malloc((len + 1) * 4);
154 if (enctypes == NULL) {
155 *minor_status = ENOMEM;
156 major_stat = GSS_S_FAILURE;
157 goto out;
158 }
159
160 sp = krb5_storage_from_mem(value->value, value->length);
161 if (sp == NULL) {
162 *minor_status = ENOMEM;
163 major_stat = GSS_S_FAILURE;
164 goto out;
165 }
166
167 for (i = 0; i < len; i++) {
168 uint32_t e;
169
170 ret = krb5_ret_uint32(sp, &e);
171 if (ret) {
172 *minor_status = ret;
173 major_stat = GSS_S_FAILURE;
174 goto out;
175 }
176 enctypes[i] = e;
177 }
178 enctypes[i] = 0;
179
180 if (cred->enctypes)
181 free(cred->enctypes);
182 cred->enctypes = enctypes;
183
184 krb5_storage_free(sp);
185
186 return GSS_S_COMPLETE;
187
188 out:
189 if (sp)
190 krb5_storage_free(sp);
191 if (enctypes)
192 free(enctypes);
193
194 return major_stat;
195 }
196
197 static OM_uint32
no_ci_flags(OM_uint32 * minor_status,krb5_context context,gss_cred_id_t * cred_handle,const gss_buffer_t value)198 no_ci_flags(OM_uint32 *minor_status,
199 krb5_context context,
200 gss_cred_id_t *cred_handle,
201 const gss_buffer_t value)
202 {
203 gsskrb5_cred cred;
204
205 if (cred_handle == NULL || *cred_handle == GSS_C_NO_CREDENTIAL) {
206 *minor_status = 0;
207 return GSS_S_FAILURE;
208 }
209
210 cred = (gsskrb5_cred)*cred_handle;
211 cred->cred_flags |= GSS_CF_NO_CI_FLAGS;
212
213 *minor_status = 0;
214 return GSS_S_COMPLETE;
215
216 }
217
218
219 OM_uint32 GSSAPI_CALLCONV
_gsskrb5_set_cred_option(OM_uint32 * minor_status,gss_cred_id_t * cred_handle,const gss_OID desired_object,const gss_buffer_t value)220 _gsskrb5_set_cred_option
221 (OM_uint32 *minor_status,
222 gss_cred_id_t *cred_handle,
223 const gss_OID desired_object,
224 const gss_buffer_t value)
225 {
226 krb5_context context;
227
228 GSSAPI_KRB5_INIT (&context);
229
230 if (value == GSS_C_NO_BUFFER) {
231 *minor_status = EINVAL;
232 return GSS_S_FAILURE;
233 }
234
235 if (gss_oid_equal(desired_object, GSS_KRB5_IMPORT_CRED_X))
236 return import_cred(minor_status, context, cred_handle, value);
237
238 if (gss_oid_equal(desired_object, GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X))
239 return allowed_enctypes(minor_status, context, cred_handle, value);
240
241 if (gss_oid_equal(desired_object, GSS_KRB5_CRED_NO_CI_FLAGS_X)) {
242 return no_ci_flags(minor_status, context, cred_handle, value);
243 }
244
245
246 *minor_status = EINVAL;
247 return GSS_S_FAILURE;
248 }
249