2 * Copyright 2004-2023 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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/buffer.h>
15 #include <openssl/x509.h>
16 #include <openssl/x509v3.h>
17 #include "crypto/x509.h"
19 #include "x509_local.h"
21 /* X509_VERIFY_PARAM functions */
26 static char *str_copy(const char *s)
28 return OPENSSL_strdup(s);
31 static void str_free(char *s)
36 static int int_x509_param_set_hosts(X509_VERIFY_PARAM *vpm, int mode,
37 const char *name, size_t namelen)
42 * Refuse names with embedded NUL bytes, except perhaps as final byte.
43 * XXX: Do we need to push an error onto the error stack?
45 if (namelen == 0 || name == NULL)
46 namelen = name ? strlen(name) : 0;
48 && memchr(name, '\0', namelen > 1 ? namelen - 1 : namelen) != NULL)
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);
82 X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
84 X509_VERIFY_PARAM *param;
86 param = OPENSSL_zalloc(sizeof(*param));
89 param->trust = X509_TRUST_DEFAULT;
90 /* param->inh_flags = X509_VP_FLAG_DEFAULT; */
92 param->auth_level = -1; /* -1 means unset, 0 is explicit */
96 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
100 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
101 sk_OPENSSL_STRING_pop_free(param->hosts, str_free);
102 OPENSSL_free(param->peername);
103 OPENSSL_free(param->email);
104 OPENSSL_free(param->ip);
109 * This function determines how parameters are "inherited" from one structure
110 * to another. There are several different ways this can happen.
112 * 1. If a child structure needs to have its values initialized from a parent
113 * they are simply copied across. For example SSL_CTX copied to SSL.
114 * 2. If the structure should take on values only if they are currently unset.
115 * For example the values in an SSL structure will take appropriate value
116 * for SSL servers or clients but only if the application has not set new
119 * The "inh_flags" field determines how this function behaves.
121 * Normally any values which are set in the default are not copied from the
122 * destination and verify flags are ORed together.
124 * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
125 * to the destination. Effectively the values in "to" become default values
126 * which will be used only if nothing new is set in "from".
128 * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
129 * they are set or not. Flags is still Ored though.
131 * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
134 * If X509_VP_FLAG_LOCKED is set then no values are copied.
136 * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
137 * after the next call.
140 /* Macro to test if a field should be copied from src to dest */
142 #define test_x509_verify_param_copy(field, def) \
143 (to_overwrite || (src->field != def && (to_default || dest->field == def)))
145 /* Macro to test and copy a field if necessary */
147 #define x509_verify_param_copy(field, def) \
148 if (test_x509_verify_param_copy(field, def)) \
149 dest->field = src->field;
151 int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
152 const X509_VERIFY_PARAM *src)
154 unsigned long inh_flags;
155 int to_default, to_overwrite;
159 inh_flags = dest->inh_flags | src->inh_flags;
161 if ((inh_flags & X509_VP_FLAG_ONCE) != 0)
164 if ((inh_flags & X509_VP_FLAG_LOCKED) != 0)
167 to_default = (inh_flags & X509_VP_FLAG_DEFAULT) != 0;
168 to_overwrite = (inh_flags & X509_VP_FLAG_OVERWRITE) != 0;
170 x509_verify_param_copy(purpose, 0);
171 x509_verify_param_copy(trust, X509_TRUST_DEFAULT);
172 x509_verify_param_copy(depth, -1);
173 x509_verify_param_copy(auth_level, -1);
175 /* If overwrite or check time not set, copy across */
177 if (to_overwrite || (dest->flags & X509_V_FLAG_USE_CHECK_TIME) == 0) {
178 dest->check_time = src->check_time;
179 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
180 /* Don't need to copy flag: that is done below */
183 if ((inh_flags & X509_VP_FLAG_RESET_FLAGS) != 0)
186 dest->flags |= src->flags;
188 if (test_x509_verify_param_copy(policies, NULL)) {
189 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
193 x509_verify_param_copy(hostflags, 0);
195 if (test_x509_verify_param_copy(hosts, NULL)) {
196 sk_OPENSSL_STRING_pop_free(dest->hosts, str_free);
198 if (src->hosts != NULL) {
200 sk_OPENSSL_STRING_deep_copy(src->hosts, str_copy, str_free);
201 if (dest->hosts == NULL)
206 if (test_x509_verify_param_copy(email, NULL)) {
207 if (!X509_VERIFY_PARAM_set1_email(dest, src->email, src->emaillen))
211 if (test_x509_verify_param_copy(ip, NULL)) {
212 if (!X509_VERIFY_PARAM_set1_ip(dest, src->ip, src->iplen))
219 int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
220 const X509_VERIFY_PARAM *from)
222 unsigned long save_flags;
226 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
229 save_flags = to->inh_flags;
230 to->inh_flags |= X509_VP_FLAG_DEFAULT;
231 ret = X509_VERIFY_PARAM_inherit(to, from);
232 to->inh_flags = save_flags;
236 static int int_x509_param_set1(char **pdest, size_t *pdestlen,
237 const char *src, size_t srclen)
243 srclen = strlen(src);
245 tmp = OPENSSL_malloc(srclen + 1);
248 memcpy(tmp, src, srclen);
249 tmp[srclen] = '\0'; /* enforce NUL termination */
254 OPENSSL_free(*pdest);
256 if (pdestlen != NULL)
261 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
263 OPENSSL_free(param->name);
264 param->name = OPENSSL_strdup(name);
265 return param->name != NULL;
268 int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
270 param->flags |= flags;
271 if ((flags & X509_V_FLAG_POLICY_MASK) != 0)
272 param->flags |= X509_V_FLAG_POLICY_CHECK;
276 int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
279 param->flags &= ~flags;
283 unsigned long X509_VERIFY_PARAM_get_flags(const X509_VERIFY_PARAM *param)
288 uint32_t X509_VERIFY_PARAM_get_inh_flags(const X509_VERIFY_PARAM *param)
290 return param->inh_flags;
293 int X509_VERIFY_PARAM_set_inh_flags(X509_VERIFY_PARAM *param, uint32_t flags)
295 param->inh_flags = flags;
299 int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
301 return X509_PURPOSE_set(¶m->purpose, purpose);
304 int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
306 return X509_TRUST_set(¶m->trust, trust);
309 void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
311 param->depth = depth;
314 void X509_VERIFY_PARAM_set_auth_level(X509_VERIFY_PARAM *param, int auth_level)
316 param->auth_level = auth_level;
319 time_t X509_VERIFY_PARAM_get_time(const X509_VERIFY_PARAM *param)
321 return param->check_time;
324 void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
326 param->check_time = t;
327 param->flags |= X509_V_FLAG_USE_CHECK_TIME;
330 int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
333 if (param->policies == NULL) {
334 param->policies = sk_ASN1_OBJECT_new_null();
335 if (param->policies == NULL)
339 if (sk_ASN1_OBJECT_push(param->policies, policy) <= 0)
344 int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
345 STACK_OF(ASN1_OBJECT) *policies)
348 ASN1_OBJECT *oid, *doid;
351 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
354 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
356 if (policies == NULL) {
357 param->policies = NULL;
361 param->policies = sk_ASN1_OBJECT_new_null();
362 if (param->policies == NULL)
365 for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
366 oid = sk_ASN1_OBJECT_value(policies, i);
370 if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
371 ASN1_OBJECT_free(doid);
375 param->flags |= X509_V_FLAG_POLICY_CHECK;
379 char *X509_VERIFY_PARAM_get0_host(X509_VERIFY_PARAM *param, int idx)
381 return sk_OPENSSL_STRING_value(param->hosts, idx);
384 int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
385 const char *name, size_t namelen)
387 return int_x509_param_set_hosts(param, SET_HOST, name, namelen);
390 int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
391 const char *name, size_t namelen)
393 return int_x509_param_set_hosts(param, ADD_HOST, name, namelen);
396 void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
399 param->hostflags = flags;
402 unsigned int X509_VERIFY_PARAM_get_hostflags(const X509_VERIFY_PARAM *param)
404 return param->hostflags;
407 char *X509_VERIFY_PARAM_get0_peername(const X509_VERIFY_PARAM *param)
409 return param->peername;
413 * Move peername from one param structure to another, freeing any name present
414 * at the target. If the source is a NULL parameter structure, free and zero
415 * the target peername.
417 void X509_VERIFY_PARAM_move_peername(X509_VERIFY_PARAM *to,
418 X509_VERIFY_PARAM *from)
420 char *peername = (from != NULL) ? from->peername : NULL;
422 if (to->peername != peername) {
423 OPENSSL_free(to->peername);
424 to->peername = peername;
427 from->peername = NULL;
430 char *X509_VERIFY_PARAM_get0_email(X509_VERIFY_PARAM *param)
435 int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
436 const char *email, size_t emaillen)
438 return int_x509_param_set1(¶m->email, ¶m->emaillen,
443 *int_X509_VERIFY_PARAM_get0_ip(X509_VERIFY_PARAM *param, size_t *plen)
445 if (param == NULL || param->ip == NULL) {
446 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
450 *plen = param->iplen;
454 char *X509_VERIFY_PARAM_get1_ip_asc(X509_VERIFY_PARAM *param)
457 unsigned char *ip = int_X509_VERIFY_PARAM_get0_ip(param, &iplen);
459 return ip == NULL ? NULL : ossl_ipaddr_to_asc(ip, iplen);
462 int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param,
463 const unsigned char *ip, size_t iplen)
465 if (iplen != 0 && iplen != 4 && iplen != 16) {
466 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_INVALID_ARGUMENT);
469 return int_x509_param_set1((char **)¶m->ip, ¶m->iplen,
473 int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc)
475 unsigned char ipout[16];
476 size_t iplen = (size_t)ossl_a2i_ipadd(ipout, ipasc);
480 return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
483 int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
488 int X509_VERIFY_PARAM_get_auth_level(const X509_VERIFY_PARAM *param)
490 return param->auth_level;
493 const char *X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
498 #define vpm_empty_id NULL, 0U, NULL, NULL, 0, NULL, 0
501 * Default verify parameters: these are used for various applications and can
502 * be overridden by the user specified table. NB: the 'name' field *must* be
503 * in alphabetical order because it will be searched using OBJ_search.
506 static const X509_VERIFY_PARAM default_table[] = {
508 "code_sign", /* Code sign parameters */
509 0, /* check time to use */
510 0, /* inheritance flags */
512 X509_PURPOSE_CODE_SIGN, /* purpose */
513 X509_TRUST_OBJECT_SIGN, /* trust */
520 "default", /* X509 default parameters */
521 0, /* check time to use */
522 0, /* inheritance flags */
523 X509_V_FLAG_TRUSTED_FIRST, /* flags */
532 "pkcs7", /* S/MIME sign parameters */
533 0, /* check time to use */
534 0, /* inheritance flags */
536 X509_PURPOSE_SMIME_SIGN, /* purpose */
537 X509_TRUST_EMAIL, /* trust */
544 "smime_sign", /* S/MIME sign parameters */
545 0, /* check time to use */
546 0, /* inheritance flags */
548 X509_PURPOSE_SMIME_SIGN, /* purpose */
549 X509_TRUST_EMAIL, /* trust */
556 "ssl_client", /* SSL/TLS client parameters */
557 0, /* check time to use */
558 0, /* inheritance flags */
560 X509_PURPOSE_SSL_CLIENT, /* purpose */
561 X509_TRUST_SSL_CLIENT, /* trust */
568 "ssl_server", /* SSL/TLS server parameters */
569 0, /* check time to use */
570 0, /* inheritance flags */
572 X509_PURPOSE_SSL_SERVER, /* purpose */
573 X509_TRUST_SSL_SERVER, /* trust */
581 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
583 static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b)
585 return strcmp(a->name, b->name);
588 DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
589 IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
591 static int param_cmp(const X509_VERIFY_PARAM *const *a,
592 const X509_VERIFY_PARAM *const *b)
594 return strcmp((*a)->name, (*b)->name);
597 int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
600 X509_VERIFY_PARAM *ptmp;
602 if (param_table == NULL) {
603 param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
604 if (param_table == NULL)
607 idx = sk_X509_VERIFY_PARAM_find(param_table, param);
609 ptmp = sk_X509_VERIFY_PARAM_delete(param_table, idx);
610 X509_VERIFY_PARAM_free(ptmp);
614 if (sk_X509_VERIFY_PARAM_push(param_table, param) <= 0)
619 int X509_VERIFY_PARAM_get_count(void)
621 int num = OSSL_NELEM(default_table);
623 if (param_table != NULL)
624 num += sk_X509_VERIFY_PARAM_num(param_table);
628 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_get0(int id)
630 int num = OSSL_NELEM(default_table);
633 return default_table + id;
634 return sk_X509_VERIFY_PARAM_value(param_table, id - num);
637 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
640 X509_VERIFY_PARAM pm;
642 pm.name = (char *)name;
643 if (param_table != NULL) {
644 /* Ideally, this would be done under a lock */
645 sk_X509_VERIFY_PARAM_sort(param_table);
646 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
648 return sk_X509_VERIFY_PARAM_value(param_table, idx);
650 return OBJ_bsearch_table(&pm, default_table, OSSL_NELEM(default_table));
653 void X509_VERIFY_PARAM_table_cleanup(void)
655 sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free);