2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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)
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 * ====================================================================
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).
61 #include <openssl/x509v3.h>
64 static int tr_cmp(const X509_TRUST * const *a,
65 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 Client", NID_server_auth, NULL},
84 {X509_TRUST_EMAIL, 0, trust_1oidany, "S/MIME email", NID_email_protect, NULL},
85 {X509_TRUST_OCSP_SIGN, 0, trust_1oid, "OCSP responder", NID_OCSP_sign, NULL}
88 #define X509_TRUST_COUNT (sizeof(trstandard)/sizeof(X509_TRUST))
90 IMPLEMENT_STACK_OF(X509_TRUST)
92 static STACK_OF(X509_TRUST) *trtable = NULL;
94 static int tr_cmp(const X509_TRUST * const *a,
95 const X509_TRUST * const *b)
97 return (*a)->trust - (*b)->trust;
100 int (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int)
102 int (*oldtrust)(int , X509 *, int);
103 oldtrust = default_trust;
104 default_trust = trust;
109 int X509_check_trust(X509 *x, int id, int flags)
113 if(id == -1) return 1;
114 idx = X509_TRUST_get_by_id(id);
115 if(idx == -1) return default_trust(id, x, flags);
116 pt = X509_TRUST_get0(idx);
117 return pt->check_trust(pt, x, flags);
120 int X509_TRUST_get_count(void)
122 if(!trtable) return X509_TRUST_COUNT;
123 return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
126 X509_TRUST * X509_TRUST_get0(int idx)
128 if(idx < 0) return NULL;
129 if(idx < X509_TRUST_COUNT) return trstandard + idx;
130 return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
133 int X509_TRUST_get_by_id(int id)
137 if((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
138 return id - X509_TRUST_MIN;
140 if(!trtable) return -1;
141 idx = sk_X509_TRUST_find(trtable, &tmp);
142 if(idx == -1) return -1;
143 return idx + X509_TRUST_COUNT;
146 int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int),
147 char *name, int arg1, void *arg2)
151 /* This is set according to what we change: application can't set it */
152 flags &= ~X509_TRUST_DYNAMIC;
153 /* This will always be set for application modified trust entries */
154 flags |= X509_TRUST_DYNAMIC_NAME;
155 /* Get existing entry if any */
156 idx = X509_TRUST_get_by_id(id);
157 /* Need a new entry */
159 if(!(trtmp = OPENSSL_malloc(sizeof(X509_TRUST)))) {
160 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
163 trtmp->flags = X509_TRUST_DYNAMIC;
164 } else trtmp = X509_TRUST_get0(idx);
166 /* OPENSSL_free existing name if dynamic */
167 if(trtmp->flags & X509_TRUST_DYNAMIC_NAME) OPENSSL_free(trtmp->name);
168 /* dup supplied name */
169 if(!(trtmp->name = BUF_strdup(name))) {
170 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
173 /* Keep the dynamic flag of existing entry */
174 trtmp->flags &= X509_TRUST_DYNAMIC;
175 /* Set all other flags */
176 trtmp->flags |= flags;
179 trtmp->check_trust = ck;
183 /* If its a new entry manage the dynamic table */
185 if(!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) {
186 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
189 if (!sk_X509_TRUST_push(trtable, trtmp)) {
190 X509err(X509_F_X509_TRUST_ADD,ERR_R_MALLOC_FAILURE);
197 static void trtable_free(X509_TRUST *p)
200 if (p->flags & X509_TRUST_DYNAMIC)
202 if (p->flags & X509_TRUST_DYNAMIC_NAME)
203 OPENSSL_free(p->name);
208 void X509_TRUST_cleanup(void)
211 for(i = 0; i < X509_TRUST_COUNT; i++) trtable_free(trstandard + i);
212 sk_X509_TRUST_pop_free(trtable, trtable_free);
216 int X509_TRUST_get_flags(X509_TRUST *xp)
221 char *X509_TRUST_get0_name(X509_TRUST *xp)
226 int X509_TRUST_get_trust(X509_TRUST *xp)
231 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
233 if(x->aux) return obj_trust(trust->arg1, x, flags);
234 /* we don't have any trust settings: for compatibility
235 * we return trusted if it is self signed
237 return trust_compat(trust, x, flags);
240 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags)
242 if(x->aux) return obj_trust(trust->arg1, x, flags);
243 return X509_TRUST_UNTRUSTED;
246 static int trust_compat(X509_TRUST *trust, X509 *x, int flags)
248 X509_check_purpose(x, -1, 0);
249 if(x->ex_flags & EXFLAG_SS) return X509_TRUST_TRUSTED;
250 else return X509_TRUST_UNTRUSTED;
253 static int obj_trust(int id, X509 *x, int flags)
259 if(!ax) return X509_TRUST_UNTRUSTED;
261 for(i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
262 obj = sk_ASN1_OBJECT_value(ax->reject, i);
263 if(OBJ_obj2nid(obj) == id) return X509_TRUST_REJECTED;
267 for(i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
268 obj = sk_ASN1_OBJECT_value(ax->trust, i);
269 if(OBJ_obj2nid(obj) == id) return X509_TRUST_TRUSTED;
272 return X509_TRUST_UNTRUSTED;