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[dragonfly.git] / crypto / openssl / crypto / x509 / x509_vpm.c
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56276539 1/* x509_vpm.c */
730b1645 2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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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
70static 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;
75607dda 77 param->inh_flags = 0;
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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
87X509_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
96void 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
146int 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
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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
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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
198int 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
205int 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
215int 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
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223int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags)
224 {
225 param->flags &= ~flags;
226 return 1;
227 }
228
229unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
230 {
231 return param->flags;
232 }
233
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234int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
235 {
236 return X509_PURPOSE_set(&param->purpose, purpose);
237 }
238
239int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
240 {
241 return X509_TRUST_set(&param->trust, trust);
242 }
243
244void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
245 {
246 param->depth = depth;
247 }
248
249void 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
255int 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
268int 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
304int 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
315static 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 */
75607dda 323 100, /* depth */
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324 NULL /* policies */
325 },
326 {
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327 "pkcs7", /* S/MIME signing 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 "smime_sign", /* S/MIME signing parameters */
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338 0, /* Check time */
339 0, /* internal flags */
340 0, /* flags */
341 X509_PURPOSE_SMIME_SIGN, /* purpose */
342 X509_TRUST_EMAIL, /* trust */
343 -1, /* depth */
344 NULL /* policies */
345 },
346 {
347 "ssl_client", /* SSL/TLS client parameters */
348 0, /* Check time */
349 0, /* internal flags */
350 0, /* flags */
351 X509_PURPOSE_SSL_CLIENT, /* purpose */
352 X509_TRUST_SSL_CLIENT, /* trust */
353 -1, /* depth */
354 NULL /* policies */
355 },
356 {
357 "ssl_server", /* SSL/TLS server parameters */
358 0, /* Check time */
359 0, /* internal flags */
360 0, /* flags */
361 X509_PURPOSE_SSL_SERVER, /* purpose */
362 X509_TRUST_SSL_SERVER, /* trust */
363 -1, /* depth */
364 NULL /* policies */
365 }};
366
367static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
368
369static int table_cmp(const void *pa, const void *pb)
370 {
371 const X509_VERIFY_PARAM *a = pa, *b = pb;
372 return strcmp(a->name, b->name);
373 }
374
375static int param_cmp(const X509_VERIFY_PARAM * const *a,
376 const X509_VERIFY_PARAM * const *b)
377 {
378 return strcmp((*a)->name, (*b)->name);
379 }
380
381int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
382 {
383 int idx;
384 X509_VERIFY_PARAM *ptmp;
385 if (!param_table)
386 {
387 param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
388 if (!param_table)
389 return 0;
390 }
391 else
392 {
393 idx = sk_X509_VERIFY_PARAM_find(param_table, param);
394 if (idx != -1)
395 {
396 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
397 X509_VERIFY_PARAM_free(ptmp);
e6bc27f5 398 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx);
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399 }
400 }
401 if (!sk_X509_VERIFY_PARAM_push(param_table, param))
402 return 0;
403 return 1;
404 }
405
406const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
407 {
408 int idx;
409 X509_VERIFY_PARAM pm;
410 pm.name = (char *)name;
411 if (param_table)
412 {
413 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
414 if (idx != -1)
415 return sk_X509_VERIFY_PARAM_value(param_table, idx);
416 }
417 return (const X509_VERIFY_PARAM *) OBJ_bsearch((char *)&pm,
418 (char *)&default_table,
419 sizeof(default_table)/sizeof(X509_VERIFY_PARAM),
420 sizeof(X509_VERIFY_PARAM),
421 table_cmp);
422 }
423
424void X509_VERIFY_PARAM_table_cleanup(void)
425 {
426 if (param_table)
427 sk_X509_VERIFY_PARAM_pop_free(param_table,
428 X509_VERIFY_PARAM_free);
429 param_table = NULL;
430 }