1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2 * project 1999. */
3 /* ====================================================================
4 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * 3. All advertising materials mentioning features or use of this
19 * software must display the following acknowledgment:
20 * "This product includes software developed by the OpenSSL Project
21 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
22 *
23 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24 * endorse or promote products derived from this software without
25 * prior written permission. For written permission, please contact
26 * licensing@OpenSSL.org.
27 *
28 * 5. Products derived from this software may not be called "OpenSSL"
29 * nor may "OpenSSL" appear in their names without prior written
30 * permission of the OpenSSL Project.
31 *
32 * 6. Redistributions of any form whatsoever must retain the following
33 * acknowledgment:
34 * "This product includes software developed by the OpenSSL Project
35 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
36 *
37 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48 * OF THE POSSIBILITY OF SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This product includes cryptographic software written by Eric Young
52 * (eay@cryptsoft.com). This product includes software written by Tim
53 * Hudson (tjh@cryptsoft.com). */
54
55 #include <openssl/buf.h>
56 #include <openssl/err.h>
57 #include <openssl/mem.h>
58 #include <openssl/obj.h>
59 #include <openssl/x509v3.h>
60
61
62 static int tr_cmp(const X509_TRUST **a,
63 const X509_TRUST **b);
64 static void trtable_free(X509_TRUST *p);
65
66 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags);
67 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags);
68 static int trust_compat(X509_TRUST *trust, X509 *x, int flags);
69
70 static int obj_trust(int id, X509 *x, int flags);
71 static int (*default_trust)(int id, X509 *x, int flags) = obj_trust;
72
73 /* WARNING: the following table should be kept in order of trust
74 * and without any gaps so we can just subtract the minimum trust
75 * value to get an index into the table
76 */
77
78 static X509_TRUST trstandard[] = {
79 {X509_TRUST_COMPAT, 0, trust_compat, (char *) "compatible", 0, NULL},
80 {X509_TRUST_SSL_CLIENT, 0, trust_1oidany, (char *) "SSL Client", NID_client_auth, NULL},
81 {X509_TRUST_SSL_SERVER, 0, trust_1oidany, (char *) "SSL Server", NID_server_auth, NULL},
82 {X509_TRUST_EMAIL, 0, trust_1oidany, (char *) "S/MIME email", NID_email_protect, NULL},
83 {X509_TRUST_OBJECT_SIGN, 0, trust_1oidany, (char *) "Object Signer", NID_code_sign, NULL},
84 {X509_TRUST_OCSP_SIGN, 0, trust_1oid, (char *) "OCSP responder", NID_OCSP_sign, NULL},
85 {X509_TRUST_OCSP_REQUEST, 0, trust_1oid, (char *) "OCSP request", NID_ad_OCSP, NULL},
86 {X509_TRUST_TSA, 0, trust_1oidany, (char *) "TSA server", NID_time_stamp, NULL}
87 };
88
89 #define X509_TRUST_COUNT (sizeof(trstandard)/sizeof(X509_TRUST))
90
91 static STACK_OF(X509_TRUST) *trtable = NULL;
92
tr_cmp(const X509_TRUST ** a,const X509_TRUST ** b)93 static int tr_cmp(const X509_TRUST **a,
94 const X509_TRUST **b)
95 {
96 return (*a)->trust - (*b)->trust;
97 }
98
X509_TRUST_set_default(int (* trust)(int,X509 *,int))99 int (*X509_TRUST_set_default(int (*trust)(int , X509 *, int)))(int, X509 *, int)
100 {
101 int (*oldtrust)(int , X509 *, int);
102 oldtrust = default_trust;
103 default_trust = trust;
104 return oldtrust;
105 }
106
107
X509_check_trust(X509 * x,int id,int flags)108 int X509_check_trust(X509 *x, int id, int flags)
109 {
110 X509_TRUST *pt;
111 int idx;
112 if(id == -1) return 1;
113 /* We get this as a default value */
114 if (id == 0)
115 {
116 int rv;
117 rv = obj_trust(NID_anyExtendedKeyUsage, x, 0);
118 if (rv != X509_TRUST_UNTRUSTED)
119 return rv;
120 return trust_compat(NULL, x, 0);
121 }
122 idx = X509_TRUST_get_by_id(id);
123 if(idx == -1) return default_trust(id, x, flags);
124 pt = X509_TRUST_get0(idx);
125 return pt->check_trust(pt, x, flags);
126 }
127
X509_TRUST_get_count(void)128 int X509_TRUST_get_count(void)
129 {
130 if(!trtable) return X509_TRUST_COUNT;
131 return sk_X509_TRUST_num(trtable) + X509_TRUST_COUNT;
132 }
133
X509_TRUST_get0(int idx)134 X509_TRUST * X509_TRUST_get0(int idx)
135 {
136 if(idx < 0) return NULL;
137 if(idx < (int)X509_TRUST_COUNT) return trstandard + idx;
138 return sk_X509_TRUST_value(trtable, idx - X509_TRUST_COUNT);
139 }
140
X509_TRUST_get_by_id(int id)141 int X509_TRUST_get_by_id(int id)
142 {
143 X509_TRUST tmp;
144 size_t idx;
145
146 if((id >= X509_TRUST_MIN) && (id <= X509_TRUST_MAX))
147 return id - X509_TRUST_MIN;
148 tmp.trust = id;
149 if(!trtable) return -1;
150 if (!sk_X509_TRUST_find(trtable, &idx, &tmp)) {
151 return -1;
152 }
153 return idx + X509_TRUST_COUNT;
154 }
155
X509_TRUST_set(int * t,int trust)156 int X509_TRUST_set(int *t, int trust)
157 {
158 if(X509_TRUST_get_by_id(trust) == -1) {
159 OPENSSL_PUT_ERROR(X509, X509_TRUST_set, X509_R_INVALID_TRUST);
160 return 0;
161 }
162 *t = trust;
163 return 1;
164 }
165
X509_TRUST_add(int id,int flags,int (* ck)(X509_TRUST *,X509 *,int),char * name,int arg1,void * arg2)166 int X509_TRUST_add(int id, int flags, int (*ck)(X509_TRUST *, X509 *, int),
167 char *name, int arg1, void *arg2)
168 {
169 int idx;
170 X509_TRUST *trtmp;
171 /* This is set according to what we change: application can't set it */
172 flags &= ~X509_TRUST_DYNAMIC;
173 /* This will always be set for application modified trust entries */
174 flags |= X509_TRUST_DYNAMIC_NAME;
175 /* Get existing entry if any */
176 idx = X509_TRUST_get_by_id(id);
177 /* Need a new entry */
178 if(idx == -1) {
179 if(!(trtmp = OPENSSL_malloc(sizeof(X509_TRUST)))) {
180 OPENSSL_PUT_ERROR(X509, X509_TRUST_add, ERR_R_MALLOC_FAILURE);
181 return 0;
182 }
183 trtmp->flags = X509_TRUST_DYNAMIC;
184 } else trtmp = X509_TRUST_get0(idx);
185
186 /* OPENSSL_free existing name if dynamic */
187 if(trtmp->flags & X509_TRUST_DYNAMIC_NAME) OPENSSL_free(trtmp->name);
188 /* dup supplied name */
189 if(!(trtmp->name = BUF_strdup(name))) {
190 OPENSSL_PUT_ERROR(X509, X509_TRUST_add, ERR_R_MALLOC_FAILURE);
191 return 0;
192 }
193 /* Keep the dynamic flag of existing entry */
194 trtmp->flags &= X509_TRUST_DYNAMIC;
195 /* Set all other flags */
196 trtmp->flags |= flags;
197
198 trtmp->trust = id;
199 trtmp->check_trust = ck;
200 trtmp->arg1 = arg1;
201 trtmp->arg2 = arg2;
202
203 /* If its a new entry manage the dynamic table */
204 if(idx == -1) {
205 if(!trtable && !(trtable = sk_X509_TRUST_new(tr_cmp))) {
206 OPENSSL_PUT_ERROR(X509, X509_TRUST_add, ERR_R_MALLOC_FAILURE);
207 return 0;
208 }
209 if (!sk_X509_TRUST_push(trtable, trtmp)) {
210 OPENSSL_PUT_ERROR(X509, X509_TRUST_add, ERR_R_MALLOC_FAILURE);
211 return 0;
212 }
213 }
214 return 1;
215 }
216
trtable_free(X509_TRUST * p)217 static void trtable_free(X509_TRUST *p)
218 {
219 if(!p) return;
220 if (p->flags & X509_TRUST_DYNAMIC)
221 {
222 if (p->flags & X509_TRUST_DYNAMIC_NAME)
223 OPENSSL_free(p->name);
224 OPENSSL_free(p);
225 }
226 }
227
X509_TRUST_cleanup(void)228 void X509_TRUST_cleanup(void)
229 {
230 unsigned int i;
231 for(i = 0; i < X509_TRUST_COUNT; i++) trtable_free(trstandard + i);
232 sk_X509_TRUST_pop_free(trtable, trtable_free);
233 trtable = NULL;
234 }
235
X509_TRUST_get_flags(X509_TRUST * xp)236 int X509_TRUST_get_flags(X509_TRUST *xp)
237 {
238 return xp->flags;
239 }
240
X509_TRUST_get0_name(X509_TRUST * xp)241 char *X509_TRUST_get0_name(X509_TRUST *xp)
242 {
243 return xp->name;
244 }
245
X509_TRUST_get_trust(X509_TRUST * xp)246 int X509_TRUST_get_trust(X509_TRUST *xp)
247 {
248 return xp->trust;
249 }
250
trust_1oidany(X509_TRUST * trust,X509 * x,int flags)251 static int trust_1oidany(X509_TRUST *trust, X509 *x, int flags)
252 {
253 if(x->aux && (x->aux->trust || x->aux->reject))
254 return obj_trust(trust->arg1, x, flags);
255 /* we don't have any trust settings: for compatibility
256 * we return trusted if it is self signed
257 */
258 return trust_compat(trust, x, flags);
259 }
260
trust_1oid(X509_TRUST * trust,X509 * x,int flags)261 static int trust_1oid(X509_TRUST *trust, X509 *x, int flags)
262 {
263 if(x->aux) return obj_trust(trust->arg1, x, flags);
264 return X509_TRUST_UNTRUSTED;
265 }
266
trust_compat(X509_TRUST * trust,X509 * x,int flags)267 static int trust_compat(X509_TRUST *trust, X509 *x, int flags)
268 {
269 X509_check_purpose(x, -1, 0);
270 if(x->ex_flags & EXFLAG_SS) return X509_TRUST_TRUSTED;
271 else return X509_TRUST_UNTRUSTED;
272 }
273
obj_trust(int id,X509 * x,int flags)274 static int obj_trust(int id, X509 *x, int flags)
275 {
276 ASN1_OBJECT *obj;
277 size_t i;
278 X509_CERT_AUX *ax;
279 ax = x->aux;
280 if(!ax) return X509_TRUST_UNTRUSTED;
281 if(ax->reject) {
282 for(i = 0; i < sk_ASN1_OBJECT_num(ax->reject); i++) {
283 obj = sk_ASN1_OBJECT_value(ax->reject, i);
284 if(OBJ_obj2nid(obj) == id) return X509_TRUST_REJECTED;
285 }
286 }
287 if(ax->trust) {
288 for(i = 0; i < sk_ASN1_OBJECT_num(ax->trust); i++) {
289 obj = sk_ASN1_OBJECT_value(ax->trust, i);
290 if(OBJ_obj2nid(obj) == id) return X509_TRUST_TRUSTED;
291 }
292 }
293 return X509_TRUST_UNTRUSTED;
294 }
295
296