1 /* $NetBSD: set_cred_option.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */
2
3 /*
4 * Copyright (c) 2004, PADL Software Pty Ltd.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * 3. Neither the name of PADL Software nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "gsskrb5_locl.h"
36
37 static OM_uint32
import_cred(OM_uint32 * minor_status,krb5_context context,gss_cred_id_t * cred_handle,const gss_buffer_t value)38 import_cred(OM_uint32 *minor_status,
39 krb5_context context,
40 gss_cred_id_t *cred_handle,
41 const gss_buffer_t value)
42 {
43 OM_uint32 major_stat;
44 krb5_error_code ret;
45 krb5_principal keytab_principal = NULL;
46 krb5_keytab keytab = NULL;
47 krb5_storage *sp = NULL;
48 krb5_ccache id = NULL;
49 char *str;
50
51 if (cred_handle == NULL || *cred_handle != GSS_C_NO_CREDENTIAL) {
52 *minor_status = 0;
53 return GSS_S_FAILURE;
54 }
55
56 sp = krb5_storage_from_mem(value->value, value->length);
57 if (sp == NULL) {
58 *minor_status = 0;
59 return GSS_S_FAILURE;
60 }
61
62 /* credential cache name */
63 ret = krb5_ret_string(sp, &str);
64 if (ret) {
65 *minor_status = ret;
66 major_stat = GSS_S_FAILURE;
67 goto out;
68 }
69 if (str[0]) {
70 ret = krb5_cc_resolve(context, str, &id);
71 if (ret) {
72 *minor_status = ret;
73 major_stat = GSS_S_FAILURE;
74 goto out;
75 }
76 }
77 free(str);
78 str = NULL;
79
80 /* keytab principal name */
81 ret = krb5_ret_string(sp, &str);
82 if (ret == 0 && str[0])
83 ret = krb5_parse_name(context, str, &keytab_principal);
84 if (ret) {
85 *minor_status = ret;
86 major_stat = GSS_S_FAILURE;
87 goto out;
88 }
89 free(str);
90 str = NULL;
91
92 /* keytab principal */
93 ret = krb5_ret_string(sp, &str);
94 if (ret) {
95 *minor_status = ret;
96 major_stat = GSS_S_FAILURE;
97 goto out;
98 }
99 if (str[0]) {
100 ret = krb5_kt_resolve(context, str, &keytab);
101 if (ret) {
102 *minor_status = ret;
103 major_stat = GSS_S_FAILURE;
104 goto out;
105 }
106 }
107 free(str);
108 str = NULL;
109
110 major_stat = _gsskrb5_krb5_import_cred(minor_status, id, keytab_principal,
111 keytab, cred_handle);
112 out:
113 if (id)
114 krb5_cc_close(context, id);
115 if (keytab_principal)
116 krb5_free_principal(context, keytab_principal);
117 if (keytab)
118 krb5_kt_close(context, keytab);
119 if (str)
120 free(str);
121 if (sp)
122 krb5_storage_free(sp);
123
124 return major_stat;
125 }
126
127
128 static OM_uint32
allowed_enctypes(OM_uint32 * minor_status,krb5_context context,gss_cred_id_t * cred_handle,const gss_buffer_t value)129 allowed_enctypes(OM_uint32 *minor_status,
130 krb5_context context,
131 gss_cred_id_t *cred_handle,
132 const gss_buffer_t value)
133 {
134 OM_uint32 major_stat;
135 krb5_error_code ret;
136 size_t len, i;
137 krb5_enctype *enctypes = NULL;
138 krb5_storage *sp = NULL;
139 gsskrb5_cred cred;
140
141 if (cred_handle == NULL || *cred_handle == GSS_C_NO_CREDENTIAL) {
142 *minor_status = 0;
143 return GSS_S_FAILURE;
144 }
145
146 cred = (gsskrb5_cred)*cred_handle;
147
148 if ((value->length % 4) != 0) {
149 *minor_status = 0;
150 major_stat = GSS_S_FAILURE;
151 goto out;
152 }
153
154 len = value->length / 4;
155 enctypes = malloc((len + 1) * 4);
156 if (enctypes == NULL) {
157 *minor_status = ENOMEM;
158 major_stat = GSS_S_FAILURE;
159 goto out;
160 }
161
162 sp = krb5_storage_from_mem(value->value, value->length);
163 if (sp == NULL) {
164 *minor_status = ENOMEM;
165 major_stat = GSS_S_FAILURE;
166 goto out;
167 }
168
169 for (i = 0; i < len; i++) {
170 uint32_t e;
171
172 ret = krb5_ret_uint32(sp, &e);
173 if (ret) {
174 *minor_status = ret;
175 major_stat = GSS_S_FAILURE;
176 goto out;
177 }
178 enctypes[i] = e;
179 }
180 enctypes[i] = 0;
181
182 if (cred->enctypes)
183 free(cred->enctypes);
184 cred->enctypes = enctypes;
185
186 krb5_storage_free(sp);
187
188 return GSS_S_COMPLETE;
189
190 out:
191 if (sp)
192 krb5_storage_free(sp);
193 if (enctypes)
194 free(enctypes);
195
196 return major_stat;
197 }
198
199 static OM_uint32
no_ci_flags(OM_uint32 * minor_status,krb5_context context,gss_cred_id_t * cred_handle,const gss_buffer_t value)200 no_ci_flags(OM_uint32 *minor_status,
201 krb5_context context,
202 gss_cred_id_t *cred_handle,
203 const gss_buffer_t value)
204 {
205 gsskrb5_cred cred;
206
207 if (cred_handle == NULL || *cred_handle == GSS_C_NO_CREDENTIAL) {
208 *minor_status = 0;
209 return GSS_S_FAILURE;
210 }
211
212 cred = (gsskrb5_cred)*cred_handle;
213 cred->cred_flags |= GSS_CF_NO_CI_FLAGS;
214
215 *minor_status = 0;
216 return GSS_S_COMPLETE;
217
218 }
219
220
221 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)222 _gsskrb5_set_cred_option
223 (OM_uint32 *minor_status,
224 gss_cred_id_t *cred_handle,
225 const gss_OID desired_object,
226 const gss_buffer_t value)
227 {
228 krb5_context context;
229
230 GSSAPI_KRB5_INIT (&context);
231
232 if (value == GSS_C_NO_BUFFER) {
233 *minor_status = EINVAL;
234 return GSS_S_FAILURE;
235 }
236
237 if (gss_oid_equal(desired_object, GSS_KRB5_IMPORT_CRED_X))
238 return import_cred(minor_status, context, cred_handle, value);
239
240 if (gss_oid_equal(desired_object, GSS_KRB5_SET_ALLOWABLE_ENCTYPES_X))
241 return allowed_enctypes(minor_status, context, cred_handle, value);
242
243 if (gss_oid_equal(desired_object, GSS_KRB5_CRED_NO_CI_FLAGS_X)) {
244 return no_ci_flags(minor_status, context, cred_handle, value);
245 }
246
247
248 *minor_status = EINVAL;
249 return GSS_S_FAILURE;
250 }
251