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5d7c222d DSH |
1 | /* x509_vpm.c */ |
2 | /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 <stdio.h> | |
60 | ||
61 | #include "cryptlib.h" | |
62 | #include <openssl/crypto.h> | |
63 | #include <openssl/lhash.h> | |
64 | #include <openssl/buffer.h> | |
65 | #include <openssl/x509.h> | |
66 | #include <openssl/x509v3.h> | |
67 | ||
68 | /* X509_VERIFY_PARAM functions */ | |
69 | ||
70 | static void x509_verify_param_zero(X509_VERIFY_PARAM *param) | |
71 | { | |
72 | if (!param) | |
73 | return; | |
74 | param->name = NULL; | |
75 | param->purpose = 0; | |
76 | param->trust = 0; | |
77 | param->inh_flags = X509_VP_FLAG_DEFAULT; | |
78 | param->flags = 0; | |
79 | param->depth = -1; | |
80 | if (param->policies) | |
81 | { | |
82 | sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); | |
83 | param->policies = NULL; | |
84 | } | |
85 | } | |
86 | ||
87 | X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void) | |
88 | { | |
89 | X509_VERIFY_PARAM *param; | |
90 | param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM)); | |
91 | memset(param, 0, sizeof(X509_VERIFY_PARAM)); | |
92 | x509_verify_param_zero(param); | |
93 | return param; | |
94 | } | |
95 | ||
96 | void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param) | |
97 | { | |
98 | x509_verify_param_zero(param); | |
99 | OPENSSL_free(param); | |
100 | } | |
101 | ||
102 | /* This function determines how parameters are "inherited" from one structure | |
103 | * to another. There are several different ways this can happen. | |
104 | * | |
105 | * 1. If a child structure needs to have its values initialized from a parent | |
106 | * they are simply copied across. For example SSL_CTX copied to SSL. | |
107 | * 2. If the structure should take on values only if they are currently unset. | |
108 | * For example the values in an SSL structure will take appropriate value | |
109 | * for SSL servers or clients but only if the application has not set new | |
110 | * ones. | |
111 | * | |
112 | * The "inh_flags" field determines how this function behaves. | |
113 | * | |
114 | * Normally any values which are set in the default are not copied from the | |
115 | * destination and verify flags are ORed together. | |
116 | * | |
117 | * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied | |
118 | * to the destination. Effectively the values in "to" become default values | |
119 | * which will be used only if nothing new is set in "from". | |
120 | * | |
121 | * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether | |
122 | * they are set or not. Flags is still Ored though. | |
123 | * | |
124 | * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead | |
125 | * of ORed. | |
126 | * | |
127 | * If X509_VP_FLAG_LOCKED is set then no values are copied. | |
128 | * | |
129 | * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed | |
130 | * after the next call. | |
131 | */ | |
132 | ||
133 | /* Macro to test if a field should be copied from src to dest */ | |
134 | ||
135 | #define test_x509_verify_param_copy(field, def) \ | |
136 | (to_overwrite || \ | |
137 | ((src->field != def) && (to_default || (dest->field == def)))) | |
138 | ||
139 | /* Macro to test and copy a field if necessary */ | |
140 | ||
141 | #define x509_verify_param_copy(field, def) \ | |
142 | if (test_x509_verify_param_copy(field, def)) \ | |
143 | dest->field = src->field | |
144 | ||
145 | ||
146 | int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest, | |
147 | const X509_VERIFY_PARAM *src) | |
148 | { | |
149 | unsigned long inh_flags; | |
150 | int to_default, to_overwrite; | |
151 | if (!src) | |
152 | return 1; | |
153 | inh_flags = dest->inh_flags | src->inh_flags; | |
154 | ||
155 | if (inh_flags & X509_VP_FLAG_ONCE) | |
156 | dest->inh_flags = 0; | |
157 | ||
158 | if (inh_flags & X509_VP_FLAG_LOCKED) | |
159 | return 1; | |
160 | ||
161 | if (inh_flags & X509_VP_FLAG_DEFAULT) | |
162 | to_default = 1; | |
163 | else | |
164 | to_default = 0; | |
165 | ||
166 | if (inh_flags & X509_VP_FLAG_OVERWRITE) | |
167 | to_overwrite = 1; | |
168 | else | |
169 | to_overwrite = 0; | |
170 | ||
171 | x509_verify_param_copy(purpose, 0); | |
172 | x509_verify_param_copy(trust, 0); | |
173 | x509_verify_param_copy(depth, -1); | |
174 | ||
e881f617 DSH |
175 | /* If overwrite or check time not set, copy across */ |
176 | ||
177 | if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) | |
178 | { | |
179 | dest->check_time = src->check_time; | |
180 | dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME; | |
181 | /* Don't need to copy flag: that is done below */ | |
182 | } | |
183 | ||
5d7c222d DSH |
184 | if (inh_flags & X509_VP_FLAG_RESET_FLAGS) |
185 | dest->flags = 0; | |
186 | ||
187 | dest->flags |= src->flags; | |
188 | ||
189 | if (test_x509_verify_param_copy(policies, NULL)) | |
190 | { | |
191 | if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies)) | |
192 | return 0; | |
193 | } | |
194 | ||
195 | return 1; | |
196 | } | |
197 | ||
198 | int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to, | |
199 | const X509_VERIFY_PARAM *from) | |
200 | { | |
201 | to->inh_flags |= X509_VP_FLAG_DEFAULT; | |
202 | return X509_VERIFY_PARAM_inherit(to, from); | |
203 | } | |
204 | ||
205 | int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name) | |
206 | { | |
207 | if (param->name) | |
208 | OPENSSL_free(param->name); | |
209 | param->name = BUF_strdup(name); | |
210 | if (param->name) | |
211 | return 1; | |
212 | return 0; | |
213 | } | |
214 | ||
215 | int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags) | |
216 | { | |
217 | param->flags |= flags; | |
218 | if (flags & X509_V_FLAG_POLICY_MASK) | |
219 | param->flags |= X509_V_FLAG_POLICY_CHECK; | |
220 | return 1; | |
221 | } | |
222 | ||
f022c177 DSH |
223 | int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags) |
224 | { | |
225 | param->flags &= ~flags; | |
226 | return 1; | |
227 | } | |
228 | ||
229 | unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param) | |
230 | { | |
231 | return param->flags; | |
232 | } | |
233 | ||
5d7c222d DSH |
234 | int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose) |
235 | { | |
236 | return X509_PURPOSE_set(¶m->purpose, purpose); | |
237 | } | |
238 | ||
239 | int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust) | |
240 | { | |
241 | return X509_TRUST_set(¶m->trust, trust); | |
242 | } | |
243 | ||
244 | void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth) | |
245 | { | |
246 | param->depth = depth; | |
247 | } | |
248 | ||
249 | void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t) | |
250 | { | |
251 | param->check_time = t; | |
252 | param->flags |= X509_V_FLAG_USE_CHECK_TIME; | |
253 | } | |
254 | ||
255 | int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy) | |
256 | { | |
257 | if (!param->policies) | |
258 | { | |
259 | param->policies = sk_ASN1_OBJECT_new_null(); | |
260 | if (!param->policies) | |
261 | return 0; | |
262 | } | |
263 | if (!sk_ASN1_OBJECT_push(param->policies, policy)) | |
264 | return 0; | |
265 | return 1; | |
266 | } | |
267 | ||
268 | int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, | |
269 | STACK_OF(ASN1_OBJECT) *policies) | |
270 | { | |
271 | int i; | |
272 | ASN1_OBJECT *oid, *doid; | |
273 | if (!param) | |
274 | return 0; | |
275 | if (param->policies) | |
276 | sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free); | |
277 | ||
278 | if (!policies) | |
279 | { | |
280 | param->policies = NULL; | |
281 | return 1; | |
282 | } | |
283 | ||
284 | param->policies = sk_ASN1_OBJECT_new_null(); | |
285 | if (!param->policies) | |
286 | return 0; | |
287 | ||
288 | for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) | |
289 | { | |
290 | oid = sk_ASN1_OBJECT_value(policies, i); | |
291 | doid = OBJ_dup(oid); | |
292 | if (!doid) | |
293 | return 0; | |
294 | if (!sk_ASN1_OBJECT_push(param->policies, doid)) | |
295 | { | |
296 | ASN1_OBJECT_free(doid); | |
297 | return 0; | |
298 | } | |
299 | } | |
300 | param->flags |= X509_V_FLAG_POLICY_CHECK; | |
301 | return 1; | |
302 | } | |
303 | ||
304 | int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param) | |
305 | { | |
306 | return param->depth; | |
307 | } | |
308 | ||
309 | /* Default verify parameters: these are used for various | |
310 | * applications and can be overridden by the user specified table. | |
311 | * NB: the 'name' field *must* be in alphabetical order because it | |
312 | * will be searched using OBJ_search. | |
313 | */ | |
314 | ||
315 | static const X509_VERIFY_PARAM default_table[] = { | |
316 | { | |
317 | "default", /* X509 default parameters */ | |
318 | 0, /* Check time */ | |
319 | 0, /* internal flags */ | |
320 | 0, /* flags */ | |
321 | 0, /* purpose */ | |
322 | 0, /* trust */ | |
323 | 9, /* depth */ | |
324 | NULL /* policies */ | |
325 | }, | |
326 | { | |
327 | "pkcs7", /* SSL/TLS client parameters */ | |
328 | 0, /* Check time */ | |
329 | 0, /* internal flags */ | |
330 | 0, /* flags */ | |
331 | X509_PURPOSE_SMIME_SIGN, /* purpose */ | |
332 | X509_TRUST_EMAIL, /* trust */ | |
333 | -1, /* depth */ | |
334 | NULL /* policies */ | |
335 | }, | |
336 | { | |
337 | "ssl_client", /* SSL/TLS client parameters */ | |
338 | 0, /* Check time */ | |
339 | 0, /* internal flags */ | |
340 | 0, /* flags */ | |
341 | X509_PURPOSE_SSL_CLIENT, /* purpose */ | |
342 | X509_TRUST_SSL_CLIENT, /* trust */ | |
343 | -1, /* depth */ | |
344 | NULL /* policies */ | |
345 | }, | |
346 | { | |
347 | "ssl_server", /* SSL/TLS server parameters */ | |
348 | 0, /* Check time */ | |
349 | 0, /* internal flags */ | |
350 | 0, /* flags */ | |
351 | X509_PURPOSE_SSL_SERVER, /* purpose */ | |
352 | X509_TRUST_SSL_SERVER, /* trust */ | |
353 | -1, /* depth */ | |
354 | NULL /* policies */ | |
355 | }}; | |
356 | ||
357 | static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL; | |
358 | ||
359 | static int table_cmp(const void *pa, const void *pb) | |
360 | { | |
361 | const X509_VERIFY_PARAM *a = pa, *b = pb; | |
362 | return strcmp(a->name, b->name); | |
363 | } | |
364 | ||
365 | static int param_cmp(const X509_VERIFY_PARAM * const *a, | |
366 | const X509_VERIFY_PARAM * const *b) | |
367 | { | |
368 | return strcmp((*a)->name, (*b)->name); | |
369 | } | |
370 | ||
371 | int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param) | |
372 | { | |
373 | int idx; | |
374 | X509_VERIFY_PARAM *ptmp; | |
375 | if (!param_table) | |
376 | { | |
377 | param_table = sk_X509_VERIFY_PARAM_new(param_cmp); | |
378 | if (!param_table) | |
379 | return 0; | |
380 | } | |
381 | else | |
382 | { | |
383 | idx = sk_X509_VERIFY_PARAM_find(param_table, param); | |
384 | if (idx != -1) | |
385 | { | |
386 | ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx); | |
387 | X509_VERIFY_PARAM_free(ptmp); | |
a6fbcb42 | 388 | (void)sk_X509_VERIFY_PARAM_delete(param_table, idx); |
5d7c222d DSH |
389 | } |
390 | } | |
391 | if (!sk_X509_VERIFY_PARAM_push(param_table, param)) | |
392 | return 0; | |
393 | return 1; | |
394 | } | |
395 | ||
396 | const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name) | |
397 | { | |
398 | int idx; | |
399 | X509_VERIFY_PARAM pm; | |
400 | pm.name = (char *)name; | |
401 | if (param_table) | |
402 | { | |
403 | idx = sk_X509_VERIFY_PARAM_find(param_table, &pm); | |
404 | if (idx != -1) | |
405 | return sk_X509_VERIFY_PARAM_value(param_table, idx); | |
406 | } | |
407 | return (const X509_VERIFY_PARAM *) OBJ_bsearch((char *)&pm, | |
408 | (char *)&default_table, | |
409 | sizeof(default_table)/sizeof(X509_VERIFY_PARAM), | |
410 | sizeof(X509_VERIFY_PARAM), | |
411 | table_cmp); | |
412 | } | |
413 | ||
414 | void X509_VERIFY_PARAM_table_cleanup(void) | |
415 | { | |
416 | if (param_table) | |
417 | sk_X509_VERIFY_PARAM_pop_free(param_table, | |
418 | X509_VERIFY_PARAM_free); | |
419 | param_table = NULL; | |
420 | } |