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)
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).
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
;