1 /* pcy_cache.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2004.
4 */
5 /* ====================================================================
6 * Copyright (c) 2004 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include "cryptlib.h"
60 #include <openssl/x509.h>
61 #include <openssl/x509v3.h>
62
63 #include "pcy_int.h"
64
65 static int policy_data_cmp(const X509_POLICY_DATA * const *a,
66 const X509_POLICY_DATA * const *b);
67 static int policy_cache_set_int(long *out, ASN1_INTEGER *value);
68
69 /* Set cache entry according to CertificatePolicies extension.
70 * Note: this destroys the passed CERTIFICATEPOLICIES structure.
71 */
72
73 static int policy_cache_create(X509 *x,
74 CERTIFICATEPOLICIES *policies, int crit)
75 {
76 int i;
77 int ret = 0;
78 X509_POLICY_CACHE *cache = x->policy_cache;
79 X509_POLICY_DATA *data = NULL;
80 POLICYINFO *policy;
81 if (sk_POLICYINFO_num(policies) == 0)
82 goto bad_policy;
83 cache->data = sk_X509_POLICY_DATA_new(policy_data_cmp);
84 if (!cache->data)
85 goto bad_policy;
86 for (i = 0; i < sk_POLICYINFO_num(policies); i++)
87 {
88 policy = sk_POLICYINFO_value(policies, i);
89 data = policy_data_new(policy, NULL, crit);
90 if (!data)
91 goto bad_policy;
92 /* Duplicate policy OIDs are illegal: reject if matches
93 * found.
94 */
95 if (OBJ_obj2nid(data->valid_policy) == NID_any_policy)
96 {
97 if (cache->anyPolicy)
98 {
99 ret = -1;
100 goto bad_policy;
101 }
102 cache->anyPolicy = data;
103 }
104 else if (sk_X509_POLICY_DATA_find(cache->data, data) != -1)
105 {
106 ret = -1;
107 goto bad_policy;
108 }
109 else if (!sk_X509_POLICY_DATA_push(cache->data, data))
110 goto bad_policy;
111 data = NULL;
112 }
113 ret = 1;
114 bad_policy:
115 if (ret == -1)
116 x->ex_flags |= EXFLAG_INVALID_POLICY;
117 if (data)
118 policy_data_free(data);
119 sk_POLICYINFO_pop_free(policies, POLICYINFO_free);
120 if (ret <= 0)
121 {
122 sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
123 cache->data = NULL;
124 }
125 return ret;
126 }
127
128
129 static int policy_cache_new(X509 *x)
130 {
131 X509_POLICY_CACHE *cache;
132 ASN1_INTEGER *ext_any = NULL;
133 POLICY_CONSTRAINTS *ext_pcons = NULL;
134 CERTIFICATEPOLICIES *ext_cpols = NULL;
135 POLICY_MAPPINGS *ext_pmaps = NULL;
136 int i;
137 cache = OPENSSL_malloc(sizeof(X509_POLICY_CACHE));
138 if (!cache)
139 return 0;
140 cache->anyPolicy = NULL;
141 cache->data = NULL;
142 cache->any_skip = -1;
143 cache->explicit_skip = -1;
144 cache->map_skip = -1;
145
146 x->policy_cache = cache;
147
148 /* Handle requireExplicitPolicy *first*. Need to process this
149 * even if we don't have any policies.
150 */
151 ext_pcons = X509_get_ext_d2i(x, NID_policy_constraints, &i, NULL);
152
153 if (!ext_pcons)
154 {
155 if (i != -1)
156 goto bad_cache;
157 }
158 else
159 {
160 if (!ext_pcons->requireExplicitPolicy
161 && !ext_pcons->inhibitPolicyMapping)
162 goto bad_cache;
163 if (!policy_cache_set_int(&cache->explicit_skip,
164 ext_pcons->requireExplicitPolicy))
165 goto bad_cache;
166 if (!policy_cache_set_int(&cache->map_skip,
167 ext_pcons->inhibitPolicyMapping))
168 goto bad_cache;
169 }
170
171 /* Process CertificatePolicies */
172
173 ext_cpols = X509_get_ext_d2i(x, NID_certificate_policies, &i, NULL);
174 /* If no CertificatePolicies extension or problem decoding then
175 * there is no point continuing because the valid policies will be
176 * NULL.
177 */
178 if (!ext_cpols)
179 {
180 /* If not absent some problem with extension */
181 if (i != -1)
182 goto bad_cache;
183 return 1;
184 }
185
186 i = policy_cache_create(x, ext_cpols, i);
187
188 /* NB: ext_cpols freed by policy_cache_set_policies */
189
190 if (i <= 0)
191 return i;
192
193 ext_pmaps = X509_get_ext_d2i(x, NID_policy_mappings, &i, NULL);
194
195 if (!ext_pmaps)
196 {
197 /* If not absent some problem with extension */
198 if (i != -1)
199 goto bad_cache;
200 }
201 else
202 {
203 i = policy_cache_set_mapping(x, ext_pmaps);
204 if (i <= 0)
205 goto bad_cache;
206 }
207
208 ext_any = X509_get_ext_d2i(x, NID_inhibit_any_policy, &i, NULL);
209
210 if (!ext_any)
211 {
212 if (i != -1)
213 goto bad_cache;
214 }
215 else if (!policy_cache_set_int(&cache->any_skip, ext_any))
216 goto bad_cache;
217
218 if (0)
219 {
220 bad_cache:
221 x->ex_flags |= EXFLAG_INVALID_POLICY;
222 }
223
224 if(ext_pcons)
225 POLICY_CONSTRAINTS_free(ext_pcons);
226
227 if (ext_any)
228 ASN1_INTEGER_free(ext_any);
229
230 return 1;
231
232
233 }
234
235 void policy_cache_free(X509_POLICY_CACHE *cache)
236 {
237 if (!cache)
238 return;
239 if (cache->anyPolicy)
240 policy_data_free(cache->anyPolicy);
241 if (cache->data)
242 sk_X509_POLICY_DATA_pop_free(cache->data, policy_data_free);
243 OPENSSL_free(cache);
244 }
245
246 const X509_POLICY_CACHE *policy_cache_set(X509 *x)
247 {
248
249 if (x->policy_cache == NULL)
250 {
251 CRYPTO_w_lock(CRYPTO_LOCK_X509);
252 policy_cache_new(x);
253 CRYPTO_w_unlock(CRYPTO_LOCK_X509);
254 }
255
256 return x->policy_cache;
257
258 }
259
260 X509_POLICY_DATA *policy_cache_find_data(const X509_POLICY_CACHE *cache,
261 const ASN1_OBJECT *id)
262 {
263 int idx;
264 X509_POLICY_DATA tmp;
265 tmp.valid_policy = (ASN1_OBJECT *)id;
266 idx = sk_X509_POLICY_DATA_find(cache->data, &tmp);
267 if (idx == -1)
268 return NULL;
269 return sk_X509_POLICY_DATA_value(cache->data, idx);
270 }
271
272 static int policy_data_cmp(const X509_POLICY_DATA * const *a,
273 const X509_POLICY_DATA * const *b)
274 {
275 return OBJ_cmp((*a)->valid_policy, (*b)->valid_policy);
276 }
277
278 static int policy_cache_set_int(long *out, ASN1_INTEGER *value)
279 {
280 if (value == NULL)
281 return 1;
282 if (value->type == V_ASN1_NEG_INTEGER)
283 return 0;
284 *out = ASN1_INTEGER_get(value);
285 return 1;
286 }