1 /* x509_vpm.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2004.
5 */
6 /* ====================================================================
7 * Copyright (c) 2004 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 #include <stdio.h>
61
62 #include "cryptlib.h"
63 #include <openssl/crypto.h>
64 #include <openssl/lhash.h>
65 #include <openssl/buffer.h>
66 #include <openssl/x509.h>
67 #include <openssl/x509v3.h>
68
69 /* X509_VERIFY_PARAM functions */
70
x509_verify_param_zero(X509_VERIFY_PARAM * param)71 static void x509_verify_param_zero(X509_VERIFY_PARAM *param)
72 {
73 if (!param)
74 return;
75 param->name = NULL;
76 param->purpose = 0;
77 param->trust = 0;
78 /*
79 * param->inh_flags = X509_VP_FLAG_DEFAULT;
80 */
81 param->inh_flags = 0;
82 param->flags = 0;
83 param->depth = -1;
84 if (param->policies) {
85 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
86 param->policies = NULL;
87 }
88 }
89
X509_VERIFY_PARAM_new(void)90 X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
91 {
92 X509_VERIFY_PARAM *param;
93 param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
94 if (!param)
95 return NULL;
96 memset(param, 0, sizeof(X509_VERIFY_PARAM));
97 x509_verify_param_zero(param);
98 return param;
99 }
100
X509_VERIFY_PARAM_free(X509_VERIFY_PARAM * param)101 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
102 {
103 if (param == NULL)
104 return;
105 x509_verify_param_zero(param);
106 OPENSSL_free(param);
107 }
108
109 /*-
110 * This function determines how parameters are "inherited" from one structure
111 * to another. There are several different ways this can happen.
112 *
113 * 1. If a child structure needs to have its values initialized from a parent
114 * they are simply copied across. For example SSL_CTX copied to SSL.
115 * 2. If the structure should take on values only if they are currently unset.
116 * For example the values in an SSL structure will take appropriate value
117 * for SSL servers or clients but only if the application has not set new
118 * ones.
119 *
120 * The "inh_flags" field determines how this function behaves.
121 *
122 * Normally any values which are set in the default are not copied from the
123 * destination and verify flags are ORed together.
124 *
125 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
126 * to the destination. Effectively the values in "to" become default values
127 * which will be used only if nothing new is set in "from".
128 *
129 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
130 * they are set or not. Flags is still Ored though.
131 *
132 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
133 * of ORed.
134 *
135 * If X509_VP_FLAG_LOCKED is set then no values are copied.
136 *
137 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
138 * after the next call.
139 */
140
141 /* Macro to test if a field should be copied from src to dest */
142
143 #define test_x509_verify_param_copy(field, def) \
144 (to_overwrite || \
145 ((src->field != def) && (to_default || (dest->field == def))))
146
147 /* Macro to test and copy a field if necessary */
148
149 #define x509_verify_param_copy(field, def) \
150 if (test_x509_verify_param_copy(field, def)) \
151 dest->field = src->field
152
X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM * dest,const X509_VERIFY_PARAM * src)153 int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
154 const X509_VERIFY_PARAM *src)
155 {
156 unsigned long inh_flags;
157 int to_default, to_overwrite;
158 if (!src)
159 return 1;
160 inh_flags = dest->inh_flags | src->inh_flags;
161
162 if (inh_flags & X509_VP_FLAG_ONCE)
163 dest->inh_flags = 0;
164
165 if (inh_flags & X509_VP_FLAG_LOCKED)
166 return 1;
167
168 if (inh_flags & X509_VP_FLAG_DEFAULT)
169 to_default = 1;
170 else
171 to_default = 0;
172
173 if (inh_flags & X509_VP_FLAG_OVERWRITE)
174 to_overwrite = 1;
175 else
176 to_overwrite = 0;
177
178 x509_verify_param_copy(purpose, 0);
179 x509_verify_param_copy(trust, 0);
180 x509_verify_param_copy(depth, -1);
181
182 /* If overwrite or check time not set, copy across */
183
184 if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) {
185 dest->check_time = src->check_time;
186 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
187 /* Don't need to copy flag: that is done below */
188 }
189
190 if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
191 dest->flags = 0;
192
193 dest->flags |= src->flags;
194
195 if (test_x509_verify_param_copy(policies, NULL)) {
196 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
197 return 0;
198 }
199
200 return 1;
201 }
202
X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM * to,const X509_VERIFY_PARAM * from)203 int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
204 const X509_VERIFY_PARAM *from)
205 {
206 unsigned long save_flags = to->inh_flags;
207 int ret;
208 to->inh_flags |= X509_VP_FLAG_DEFAULT;
209 ret = X509_VERIFY_PARAM_inherit(to, from);
210 to->inh_flags = save_flags;
211 return ret;
212 }
213
X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM * param,const char * name)214 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
215 {
216 if (param->name)
217 OPENSSL_free(param->name);
218 param->name = BUF_strdup(name);
219 if (param->name)
220 return 1;
221 return 0;
222 }
223
X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM * param,unsigned long flags)224 int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
225 {
226 param->flags |= flags;
227 if (flags & X509_V_FLAG_POLICY_MASK)
228 param->flags |= X509_V_FLAG_POLICY_CHECK;
229 return 1;
230 }
231
X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM * param,unsigned long flags)232 int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
233 unsigned long flags)
234 {
235 param->flags &= ~flags;
236 return 1;
237 }
238
X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM * param)239 unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
240 {
241 return param->flags;
242 }
243
X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM * param,int purpose)244 int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
245 {
246 return X509_PURPOSE_set(¶m->purpose, purpose);
247 }
248
X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM * param,int trust)249 int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
250 {
251 return X509_TRUST_set(¶m->trust, trust);
252 }
253
X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM * param,int depth)254 void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
255 {
256 param->depth = depth;
257 }
258
X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM * param,time_t t)259 void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
260 {
261 param->check_time = t;
262 param->flags |= X509_V_FLAG_USE_CHECK_TIME;
263 }
264
X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM * param,ASN1_OBJECT * policy)265 int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
266 ASN1_OBJECT *policy)
267 {
268 if (!param->policies) {
269 param->policies = sk_ASN1_OBJECT_new_null();
270 if (!param->policies)
271 return 0;
272 }
273 if (!sk_ASN1_OBJECT_push(param->policies, policy))
274 return 0;
275 return 1;
276 }
277
X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM * param,STACK_OF (ASN1_OBJECT)* policies)278 int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
279 STACK_OF(ASN1_OBJECT) *policies)
280 {
281 int i;
282 ASN1_OBJECT *oid, *doid;
283 if (!param)
284 return 0;
285 if (param->policies)
286 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
287
288 if (!policies) {
289 param->policies = NULL;
290 return 1;
291 }
292
293 param->policies = sk_ASN1_OBJECT_new_null();
294 if (!param->policies)
295 return 0;
296
297 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
298 oid = sk_ASN1_OBJECT_value(policies, i);
299 doid = OBJ_dup(oid);
300 if (!doid)
301 return 0;
302 if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
303 ASN1_OBJECT_free(doid);
304 return 0;
305 }
306 }
307 param->flags |= X509_V_FLAG_POLICY_CHECK;
308 return 1;
309 }
310
X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM * param)311 int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
312 {
313 return param->depth;
314 }
315
316 /*
317 * Default verify parameters: these are used for various applications and can
318 * be overridden by the user specified table. NB: the 'name' field *must* be
319 * in alphabetical order because it will be searched using OBJ_search.
320 */
321
322 static const X509_VERIFY_PARAM default_table[] = {
323 {
324 "default", /* X509 default parameters */
325 0, /* Check time */
326 0, /* internal flags */
327 0, /* flags */
328 0, /* purpose */
329 0, /* trust */
330 100, /* depth */
331 NULL /* policies */
332 },
333 {
334 "pkcs7", /* S/MIME sign parameters */
335 0, /* Check time */
336 0, /* internal flags */
337 0, /* flags */
338 X509_PURPOSE_SMIME_SIGN, /* purpose */
339 X509_TRUST_EMAIL, /* trust */
340 -1, /* depth */
341 NULL /* policies */
342 },
343 {
344 "smime_sign", /* S/MIME sign parameters */
345 0, /* Check time */
346 0, /* internal flags */
347 0, /* flags */
348 X509_PURPOSE_SMIME_SIGN, /* purpose */
349 X509_TRUST_EMAIL, /* trust */
350 -1, /* depth */
351 NULL /* policies */
352 },
353 {
354 "ssl_client", /* SSL/TLS client parameters */
355 0, /* Check time */
356 0, /* internal flags */
357 0, /* flags */
358 X509_PURPOSE_SSL_CLIENT, /* purpose */
359 X509_TRUST_SSL_CLIENT, /* trust */
360 -1, /* depth */
361 NULL /* policies */
362 },
363 {
364 "ssl_server", /* SSL/TLS server parameters */
365 0, /* Check time */
366 0, /* internal flags */
367 0, /* flags */
368 X509_PURPOSE_SSL_SERVER, /* purpose */
369 X509_TRUST_SSL_SERVER, /* trust */
370 -1, /* depth */
371 NULL /* policies */
372 }
373 };
374
375 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
376
table_cmp(const X509_VERIFY_PARAM * a,const X509_VERIFY_PARAM * b)377 static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b)
378 {
379 return strcmp(a->name, b->name);
380 }
381
382 DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
383 IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
384
param_cmp(const X509_VERIFY_PARAM * const * a,const X509_VERIFY_PARAM * const * b)385 static int param_cmp(const X509_VERIFY_PARAM *const *a,
386 const X509_VERIFY_PARAM *const *b)
387 {
388 return strcmp((*a)->name, (*b)->name);
389 }
390
X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM * param)391 int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
392 {
393 int idx;
394 X509_VERIFY_PARAM *ptmp;
395 if (!param_table) {
396 param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
397 if (!param_table)
398 return 0;
399 } else {
400 idx = sk_X509_VERIFY_PARAM_find(param_table, param);
401 if (idx != -1) {
402 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
403 X509_VERIFY_PARAM_free(ptmp);
404 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx);
405 }
406 }
407 if (!sk_X509_VERIFY_PARAM_push(param_table, param))
408 return 0;
409 return 1;
410 }
411
X509_VERIFY_PARAM_lookup(const char * name)412 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
413 {
414 int idx;
415 X509_VERIFY_PARAM pm;
416
417 pm.name = (char *)name;
418 if (param_table) {
419 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
420 if (idx != -1)
421 return sk_X509_VERIFY_PARAM_value(param_table, idx);
422 }
423 return OBJ_bsearch_table(&pm, default_table,
424 sizeof(default_table) /
425 sizeof(X509_VERIFY_PARAM));
426 }
427
X509_VERIFY_PARAM_table_cleanup(void)428 void X509_VERIFY_PARAM_table_cleanup(void)
429 {
430 if (param_table)
431 sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free);
432 param_table = NULL;
433 }
434