1 /* $OpenBSD: x509_trs.c,v 1.23 2018/05/18 18:40:38 tb Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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)
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49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
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).
62 #include <openssl/err.h>
63 #include <openssl/x509v3.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;
75 /* WARNING: the following table should be kept in order of trust
76 * and without any gaps so we can just subtract the minimum trust
77 * value to get an index into the table
80 static X509_TRUST trstandard[] = {
81 {X509_TRUST_COMPAT, 0, trust_compat, "compatible", 0, NULL},
82 {X509_TRUST_SSL_CLIENT, 0, trust_1oidany, "SSL Client", NID_client_auth, NULL},
83 {X509_TRUST_SSL_SERVER, 0, trust_1oidany, "SSL Server", NID_server_auth, NULL},
84 {X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect, NULL},
85 {X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, "Object Signer", NID_code_sign, NULL},
86 {X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign, NULL},
87 {X509_TRUST_OCSP_REQUEST, 0, trust_1oid, "OCSP request", NID_ad_OCSP, NULL},
88 {X509_TRUST_TSA, 0, trust_1oidany, "TSA server", NID_time_stamp, NULL}
91 #define X509_TRUST_COUNT (sizeof(trstandard)/sizeof(X509_TRUST))
93 static STACK_OF(X509_TRUST) *trtable = NULL;
96 tr_cmp(const X509_TRUST * const *a, const X509_TRUST * const *b)
98 return (*a)->trust - (*b)->trust;
102 (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int)
104 int (*oldtrust)(int , X509 *, int);
106 oldtrust = default_trust;
107 default_trust = trust;
112 X509_check_trust(X509 *x, int id, int flags)
120 * XXX beck/jsing This enables self signed certs to be trusted for
121 * an unspecified id/trust flag value (this is NOT the
122 * X509_TRUST_DEFAULT), which was the longstanding
123 * openssl behaviour. boringssl does not have this behaviour.
125 * This should be revisited, but changing the default "not default"
130 rv = obj_trust(NID_anyExtendedKeyUsage, x, 0);
131 if (rv != X509_TRUST_UNTRUSTED)
133 return trust_compat(NULL, x, 0);
135 idx = X509_TRUST_get_by_id(id);
137 return default_trust(id, x, flags);
138 pt = X509_TRUST_get0(idx);
139 return pt->check_trust(pt, x, flags);
143 X509_TRUST_get_count(void)
146 return X509_TRUST_COUNT;
147 return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
151 X509_TRUST_get0(int idx)
155 if (idx < (int)X509_TRUST_COUNT)
156 return trstandard + idx;
157 return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
161 X509_TRUST_get_by_id(int id)
166 if ((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
167 return id - X509_TRUST_MIN;
171 idx = sk_X509_TRUST_find(trtable, &tmp);
174 return idx + X509_TRUST_COUNT;
178 X509_TRUST_set(int *t, int trust)
180 if (X509_TRUST_get_by_id(trust) == -1) {
181 X509error(X509_R_INVALID_TRUST);
189 X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int),
190 const char *name, int arg1, void *arg2)
196 /* This is set according to what we change: application can't set it */
197 flags &= ~X509_TRUST_DYNAMIC;
198 /* This will always be set for application modified trust entries */
199 flags |= X509_TRUST_DYNAMIC_NAME;
200 /* Get existing entry if any */
201 idx = X509_TRUST_get_by_id(id);
202 /* Need a new entry */
204 if (!(trtmp = malloc(sizeof(X509_TRUST)))) {
205 X509error(ERR_R_MALLOC_FAILURE);
208 trtmp->flags = X509_TRUST_DYNAMIC;
210 trtmp = X509_TRUST_get0(idx);
212 X509error(X509_R_INVALID_TRUST);
217 if ((name_dup = strdup(name)) == NULL)
220 /* free existing name if dynamic */
221 if (trtmp->flags & X509_TRUST_DYNAMIC_NAME)
223 /* dup supplied name */
224 trtmp->name = name_dup;
225 /* Keep the dynamic flag of existing entry */
226 trtmp->flags &= X509_TRUST_DYNAMIC;
227 /* Set all other flags */
228 trtmp->flags |= flags;
231 trtmp->check_trust = ck;
235 /* If it's a new entry, manage the dynamic table */
237 if (trtable == NULL &&
238 (trtable = sk_X509_TRUST_new(tr_cmp)) == NULL)
240 if (sk_X509_TRUST_push(trtable, trtmp) == 0)
249 X509error(ERR_R_MALLOC_FAILURE);
254 trtable_free(X509_TRUST *p)
258 if (p->flags & X509_TRUST_DYNAMIC) {
259 if (p->flags & X509_TRUST_DYNAMIC_NAME)
266 X509_TRUST_cleanup(void)
270 for (i = 0; i < X509_TRUST_COUNT; i++)
271 trtable_free(trstandard + i);
272 sk_X509_TRUST_pop_free(trtable, trtable_free);
277 X509_TRUST_get_flags(const X509_TRUST *xp)
283 X509_TRUST_get0_name(const X509_TRUST *xp)
289 X509_TRUST_get_trust(const X509_TRUST *xp)
295 trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
297 if (x->aux && (x->aux->trust || x->aux->reject))
298 return obj_trust(trust->arg1, x, flags);
299 /* we don't have any trust settings: for compatibility
300 * we return trusted if it is self signed
302 return trust_compat(trust, x, flags);
306 trust_1oid(X509_TRUST *trust, X509 *x, int flags)
309 return obj_trust(trust->arg1, x, flags);
310 return X509_TRUST_UNTRUSTED;
314 trust_compat(X509_TRUST *trust, X509 *x, int flags)
316 X509_check_purpose(x, -1, 0);
317 if (x->ex_flags & EXFLAG_SS)
318 return X509_TRUST_TRUSTED;
320 return X509_TRUST_UNTRUSTED;
324 obj_trust(int id, X509 *x, int flags)
332 return X509_TRUST_UNTRUSTED;
334 for (i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
335 obj = sk_ASN1_OBJECT_value(ax->reject, i);
336 if (OBJ_obj2nid(obj) == id)
337 return X509_TRUST_REJECTED;
341 for (i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
342 obj = sk_ASN1_OBJECT_value(ax->trust, i);
343 if (OBJ_obj2nid(obj) == id)
344 return X509_TRUST_TRUSTED;
347 return X509_TRUST_UNTRUSTED;