2 * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include "internal/cryptlib.h"
13 #include <openssl/crypto.h>
14 #include <openssl/lhash.h>
15 #include <openssl/buffer.h>
16 #include <openssl/x509.h>
17 #include <openssl/x509v3.h>
18 #include "internal/x509_int.h"
22 /* X509_VERIFY_PARAM functions */
27 static char *str_copy(const char *s)
29 return OPENSSL_strdup(s);
32 static void str_free(char *s)
37 static int int_x509_param_set_hosts(X509_VERIFY_PARAM *vpm, int mode,
38 const char *name, size_t namelen)
43 * Refuse names with embedded NUL bytes, except perhaps as final byte.
44 * XXX: Do we need to push an error onto the error stack?
46 if (namelen == 0 || name == NULL)
47 namelen = name ? strlen(name) : 0;
48 else if (name && memchr(name, '\0', namelen > 1 ? namelen - 1 : namelen))
50 if (namelen > 0 && name[namelen - 1] == '\0')
53 if (mode == SET_HOST) {
54 sk_OPENSSL_STRING_pop_free(vpm->hosts, str_free);
57 if (name == NULL || namelen == 0)
60 copy = OPENSSL_strndup(name, namelen);
64 if (vpm->hosts == NULL &&
65 (vpm->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
70 if (!sk_OPENSSL_STRING_push(vpm->hosts, copy)) {
72 if (sk_OPENSSL_STRING_num(vpm->hosts) == 0) {
73 sk_OPENSSL_STRING_free(vpm->hosts);
83 X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
85 X509_VERIFY_PARAM *param;
87 param = OPENSSL_zalloc(sizeof(*param));
90 param->trust = X509_TRUST_DEFAULT;
92 * param->inh_flags = X509_VP_FLAG_DEFAULT;
96 param->auth_level = -1; /* -1 means unset, 0 is explicit */
100 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
104 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
105 sk_OPENSSL_STRING_pop_free(param->hosts, str_free);
106 OPENSSL_free(param->peername);
107 OPENSSL_free(param->email);
108 OPENSSL_free(param->ip);
113 * This function determines how parameters are "inherited" from one structure
114 * to another. There are several different ways this can happen.
116 * 1. If a child structure needs to have its values initialized from a parent
117 * they are simply copied across. For example SSL_CTX copied to SSL.
118 * 2. If the structure should take on values only if they are currently unset.
119 * For example the values in an SSL structure will take appropriate value
120 * for SSL servers or clients but only if the application has not set new
123 * The "inh_flags" field determines how this function behaves.
125 * Normally any values which are set in the default are not copied from the
126 * destination and verify flags are ORed together.
128 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
129 * to the destination. Effectively the values in "to" become default values
130 * which will be used only if nothing new is set in "from".
132 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
133 * they are set or not. Flags is still Ored though.
135 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
138 * If X509_VP_FLAG_LOCKED is set then no values are copied.
140 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
141 * after the next call.
144 /* Macro to test if a field should be copied from src to dest */
146 #define test_x509_verify_param_copy(field, def) \
148 ((src->field != def) && (to_default || (dest->field == def))))
150 /* Macro to test and copy a field if necessary */
152 #define x509_verify_param_copy(field, def) \
153 if (test_x509_verify_param_copy(field, def)) \
154 dest->field = src->field
156 int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
157 const X509_VERIFY_PARAM *src)
159 unsigned long inh_flags;
160 int to_default, to_overwrite;
163 inh_flags = dest->inh_flags | src->inh_flags;
165 if (inh_flags & X509_VP_FLAG_ONCE)
168 if (inh_flags & X509_VP_FLAG_LOCKED)
171 if (inh_flags & X509_VP_FLAG_DEFAULT)
176 if (inh_flags & X509_VP_FLAG_OVERWRITE)
181 x509_verify_param_copy(purpose, 0);
182 x509_verify_param_copy(trust, X509_TRUST_DEFAULT);
183 x509_verify_param_copy(depth, -1);
184 x509_verify_param_copy(auth_level, -1);
186 /* If overwrite or check time not set, copy across */
188 if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) {
189 dest->check_time = src->check_time;
190 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
191 /* Don't need to copy flag: that is done below */
194 if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
197 dest->flags |= src->flags;
199 if (test_x509_verify_param_copy(policies, NULL)) {
200 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
204 /* Copy the host flags if and only if we're copying the host list */
205 if (test_x509_verify_param_copy(hosts, NULL)) {
206 sk_OPENSSL_STRING_pop_free(dest->hosts, str_free);
210 sk_OPENSSL_STRING_deep_copy(src->hosts, str_copy, str_free);
211 if (dest->hosts == NULL)
213 dest->hostflags = src->hostflags;
217 if (test_x509_verify_param_copy(email, NULL)) {
218 if (!X509_VERIFY_PARAM_set1_email(dest, src->email, src->emaillen))
222 if (test_x509_verify_param_copy(ip, NULL)) {
223 if (!X509_VERIFY_PARAM_set1_ip(dest, src->ip, src->iplen))
230 int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
231 const X509_VERIFY_PARAM *from)
233 unsigned long save_flags = to->inh_flags;
235 to->inh_flags |= X509_VP_FLAG_DEFAULT;
236 ret = X509_VERIFY_PARAM_inherit(to, from);
237 to->inh_flags = save_flags;
241 static int int_x509_param_set1(char **pdest, size_t *pdestlen,
242 const char *src, size_t srclen)
247 srclen = strlen(src);
249 tmp = OPENSSL_memdup(src, srclen);
256 OPENSSL_free(*pdest);
258 if (pdestlen != NULL)
263 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
265 OPENSSL_free(param->name);
266 param->name = OPENSSL_strdup(name);
272 int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
274 param->flags |= flags;
275 if (flags & X509_V_FLAG_POLICY_MASK)
276 param->flags |= X509_V_FLAG_POLICY_CHECK;
280 int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
283 param->flags &= ~flags;
287 unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
292 int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
294 return X509_PURPOSE_set(¶m->purpose, purpose);
297 int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
299 return X509_TRUST_set(¶m->trust, trust);
302 void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
304 param->depth = depth;
307 void X509_VERIFY_PARAM_set_auth_level(X509_VERIFY_PARAM *param, int auth_level)
309 param->auth_level = auth_level;
312 void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
314 param->check_time = t;
315 param->flags |= X509_V_FLAG_USE_CHECK_TIME;
318 int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
321 if (!param->policies) {
322 param->policies = sk_ASN1_OBJECT_new_null();
323 if (!param->policies)
326 if (!sk_ASN1_OBJECT_push(param->policies, policy))
331 int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
332 STACK_OF(ASN1_OBJECT) *policies)
335 ASN1_OBJECT *oid, *doid;
339 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
342 param->policies = NULL;
346 param->policies = sk_ASN1_OBJECT_new_null();
347 if (!param->policies)
350 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
351 oid = sk_ASN1_OBJECT_value(policies, i);
355 if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
356 ASN1_OBJECT_free(doid);
360 param->flags |= X509_V_FLAG_POLICY_CHECK;
364 int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
365 const char *name, size_t namelen)
367 return int_x509_param_set_hosts(param, SET_HOST, name, namelen);
370 int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
371 const char *name, size_t namelen)
373 return int_x509_param_set_hosts(param, ADD_HOST, name, namelen);
376 void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
379 param->hostflags = flags;
382 char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param)
384 return param->peername;
388 * Move peername from one param structure to another, freeing any name present
389 * at the target. If the source is a NULL parameter structure, free and zero
390 * the target peername.
392 void X509_VERIFY_PARAM_move_peername(X509_VERIFY_PARAM *to,
393 X509_VERIFY_PARAM *from)
395 char *peername = (from != NULL) ? from->peername : NULL;
397 if (to->peername != peername) {
398 OPENSSL_free(to->peername);
399 to->peername = peername;
402 from->peername = NULL;
405 int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
406 const char *email, size_t emaillen)
408 return int_x509_param_set1(¶m->email, ¶m->emaillen,
412 int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param,
413 const unsigned char *ip, size_t iplen)
415 if (iplen != 0 && iplen != 4 && iplen != 16)
417 return int_x509_param_set1((char **)¶m->ip, ¶m->iplen,
421 int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc)
423 unsigned char ipout[16];
426 iplen = (size_t)a2i_ipadd(ipout, ipasc);
429 return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
432 int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
437 int X509_VERIFY_PARAM_get_auth_level(const X509_VERIFY_PARAM *param)
439 return param->auth_level;
442 const char *X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
447 #define vpm_empty_id NULL, 0U, NULL, NULL, 0, NULL, 0
450 * Default verify parameters: these are used for various applications and can
451 * be overridden by the user specified table. NB: the 'name' field *must* be
452 * in alphabetical order because it will be searched using OBJ_search.
455 static const X509_VERIFY_PARAM default_table[] = {
457 "default", /* X509 default parameters */
459 0, /* internal flags */
460 X509_V_FLAG_TRUSTED_FIRST, /* flags */
468 "pkcs7", /* S/MIME sign parameters */
470 0, /* internal flags */
472 X509_PURPOSE_SMIME_SIGN, /* purpose */
473 X509_TRUST_EMAIL, /* trust */
479 "smime_sign", /* S/MIME sign parameters */
481 0, /* internal flags */
483 X509_PURPOSE_SMIME_SIGN, /* purpose */
484 X509_TRUST_EMAIL, /* trust */
490 "ssl_client", /* SSL/TLS client parameters */
492 0, /* internal flags */
494 X509_PURPOSE_SSL_CLIENT, /* purpose */
495 X509_TRUST_SSL_CLIENT, /* trust */
501 "ssl_server", /* SSL/TLS server parameters */
503 0, /* internal flags */
505 X509_PURPOSE_SSL_SERVER, /* purpose */
506 X509_TRUST_SSL_SERVER, /* trust */
513 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
515 static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b)
517 return strcmp(a->name, b->name);
520 DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
521 IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
523 static int param_cmp(const X509_VERIFY_PARAM *const *a,
524 const X509_VERIFY_PARAM *const *b)
526 return strcmp((*a)->name, (*b)->name);
529 int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
532 X509_VERIFY_PARAM *ptmp;
533 if (param_table == NULL) {
534 param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
535 if (param_table == NULL)
538 idx = sk_X509_VERIFY_PARAM_find(param_table, param);
540 ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
541 X509_VERIFY_PARAM_free(ptmp);
542 (void)sk_X509_VERIFY_PARAM_delete(param_table, idx);
545 if (!sk_X509_VERIFY_PARAM_push(param_table, param))
550 int X509_VERIFY_PARAM_get_count(void)
552 int num = OSSL_NELEM(default_table);
554 num += sk_X509_VERIFY_PARAM_num(param_table);
558 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_get0(int id)
560 int num = OSSL_NELEM(default_table);
562 return default_table + id;
563 return sk_X509_VERIFY_PARAM_value(param_table, id - num);
566 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
569 X509_VERIFY_PARAM pm;
571 pm.name = (char *)name;
573 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
575 return sk_X509_VERIFY_PARAM_value(param_table, idx);
577 return OBJ_bsearch_table(&pm, default_table, OSSL_NELEM(default_table));
580 void X509_VERIFY_PARAM_table_cleanup(void)
582 sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free);