3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #include "internal/cryptlib.h"
62 #include <openssl/x509v3.h>
63 #include "internal/x509_int.h"
65 static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b);
66 static void trtable_free(X509_TRUST *p);
68 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags);
69 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags);
70 static int trust_compat(X509_TRUST *trust, X509 *x, int flags);
72 static int obj_trust(int id, X509 *x, int flags);
73 static int (*default_trust) (int id, X509 *x, int flags) = obj_trust;
76 * WARNING: the following table should be kept in order of trust and without
77 * any gaps so we can just subtract the minimum trust value to get an index
81 static X509_TRUST trstandard[] = {
82 {X509_TRUST_COMPAT, 0, trust_compat, "compatible", 0, NULL},
83 {X509_TRUST_SSL_CLIENT, 0, trust_1oidany, "SSL Client", NID_client_auth,
85 {X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Server", NID_server_auth,
87 {X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect,
89 {X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, "Object Signer", NID_code_sign,
91 {X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign,
93 {X509_TRUST_OCSP_REQUEST, 0, trust_1oid, "OCSP request", NID_ad_OCSP,
95 {X509_TRUST_TSA, 0, trust_1oidany, "TSA server", NID_time_stamp, NULL}
98 #define X509_TRUST_COUNT OSSL_NELEM(trstandard)
100 static STACK_OF(X509_TRUST) *trtable = NULL;
102 static int tr_cmp(const X509_TRUST *const *a, const X509_TRUST *const *b)
104 return (*a)->trust - (*b)->trust;
107 int (*X509_TRUST_set_default(int (*trust) (int, X509 *, int))) (int, X509 *,
109 int (*oldtrust) (int, X509 *, int);
110 oldtrust = default_trust;
111 default_trust = trust;
115 int X509_check_trust(X509 *x, int id, int flags)
120 /* We get this as a default value */
123 rv = obj_trust(NID_anyExtendedKeyUsage, x, 0);
124 if (rv != X509_TRUST_UNTRUSTED)
126 return trust_compat(NULL, x, 0);
128 idx = X509_TRUST_get_by_id(id);
130 return default_trust(id, x, flags);
131 pt = X509_TRUST_get0(idx);
132 return pt->check_trust(pt, x, flags);
135 int X509_TRUST_get_count(void)
138 return X509_TRUST_COUNT;
139 return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
142 X509_TRUST *X509_TRUST_get0(int idx)
146 if (idx < (int)X509_TRUST_COUNT)
147 return trstandard + idx;
148 return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
151 int X509_TRUST_get_by_id(int id)
155 if ((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
156 return id - X509_TRUST_MIN;
160 idx = sk_X509_TRUST_find(trtable, &tmp);
163 return idx + X509_TRUST_COUNT;
166 int X509_TRUST_set(int *t, int trust)
168 if (X509_TRUST_get_by_id(trust) == -1) {
169 X509err(X509_F_X509_TRUST_SET, X509_R_INVALID_TRUST);
176 int X509_TRUST_add(int id, int flags, int (*ck) (X509_TRUST *, X509 *, int),
177 char *name, int arg1, void *arg2)
182 * This is set according to what we change: application can't set it
184 flags &= ~X509_TRUST_DYNAMIC;
185 /* This will always be set for application modified trust entries */
186 flags |= X509_TRUST_DYNAMIC_NAME;
187 /* Get existing entry if any */
188 idx = X509_TRUST_get_by_id(id);
189 /* Need a new entry */
191 if ((trtmp = OPENSSL_malloc(sizeof(*trtmp))) == NULL) {
192 X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
195 trtmp->flags = X509_TRUST_DYNAMIC;
197 trtmp = X509_TRUST_get0(idx);
199 /* OPENSSL_free existing name if dynamic */
200 if (trtmp->flags & X509_TRUST_DYNAMIC_NAME)
201 OPENSSL_free(trtmp->name);
202 /* dup supplied name */
203 if ((trtmp->name = OPENSSL_strdup(name)) == NULL) {
204 X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
207 /* Keep the dynamic flag of existing entry */
208 trtmp->flags &= X509_TRUST_DYNAMIC;
209 /* Set all other flags */
210 trtmp->flags |= flags;
213 trtmp->check_trust = ck;
217 /* If its a new entry manage the dynamic table */
220 && (trtable = sk_X509_TRUST_new(tr_cmp)) == NULL) {
221 X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
224 if (!sk_X509_TRUST_push(trtable, trtmp)) {
225 X509err(X509_F_X509_TRUST_ADD, ERR_R_MALLOC_FAILURE);
232 static void trtable_free(X509_TRUST *p)
236 if (p->flags & X509_TRUST_DYNAMIC) {
237 if (p->flags & X509_TRUST_DYNAMIC_NAME)
238 OPENSSL_free(p->name);
243 void X509_TRUST_cleanup(void)
246 for (i = 0; i < X509_TRUST_COUNT; i++)
247 trtable_free(trstandard + i);
248 sk_X509_TRUST_pop_free(trtable, trtable_free);
252 int X509_TRUST_get_flags(X509_TRUST *xp)
257 char *X509_TRUST_get0_name(X509_TRUST *xp)
262 int X509_TRUST_get_trust(X509_TRUST *xp)
267 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
269 if (x->aux && (x->aux->trust || x->aux->reject))
270 return obj_trust(trust->arg1, x, flags);
272 * we don't have any trust settings: for compatibility we return trusted
273 * if it is self signed
275 return trust_compat(trust, x, flags);
278 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags)
281 return obj_trust(trust->arg1, x, flags);
282 return X509_TRUST_UNTRUSTED;
285 static int trust_compat(X509_TRUST *trust, X509 *x, int flags)
287 X509_check_purpose(x, -1, 0);
288 if (x->ex_flags & EXFLAG_SS)
289 return X509_TRUST_TRUSTED;
291 return X509_TRUST_UNTRUSTED;
294 static int obj_trust(int id, X509 *x, int flags)
301 return X509_TRUST_UNTRUSTED;
303 for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
304 obj = sk_ASN1_OBJECT_value(ax->reject, i);
305 if (OBJ_obj2nid(obj) == id)
306 return X509_TRUST_REJECTED;
310 for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
311 obj = sk_ASN1_OBJECT_value(ax->trust, i);
312 if (OBJ_obj2nid(obj) == id)
313 return X509_TRUST_TRUSTED;
316 * Reject when explicit trust EKU are set and none match.
318 * Returning untrusted is enough for for full chains that end in
319 * self-signed roots, because when explicit trust is specified it
320 * suppresses the default blanket trust of self-signed objects.
322 * But for partial chains, this is not enough, because absent a similar
323 * trust-self-signed policy, non matching EKUs are indistinguishable
324 * from lack of EKU constraints.
326 * Therefore, failure to match any trusted purpose must trigger an
329 return X509_TRUST_REJECTED;
331 return X509_TRUST_UNTRUSTED;