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4acc3e90 | 1 | /* pcy_cache.c */ |
2e597528 | 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
4acc3e90 DSH |
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 | ||
b79c82ea DSH |
65 | static int policy_data_cmp(const X509_POLICY_DATA * const *a, |
66 | const X509_POLICY_DATA * const *b); | |
4acc3e90 DSH |
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; | |
4acc3e90 DSH |
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 | ||
b79c82ea DSH |
272 | static int policy_data_cmp(const X509_POLICY_DATA * const *a, |
273 | const X509_POLICY_DATA * const *b) | |
4acc3e90 | 274 | { |
4acc3e90 DSH |
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 | } |