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).
59 /* X509 v3 extension utilities */
63 #include <openssl/conf.h>
64 #include <openssl/x509v3.h>
68 static STACK_OF(X509V3_EXT_METHOD
) *ext_list
= NULL
;
70 static int ext_cmp(const X509V3_EXT_METHOD
*const *a
,
71 const X509V3_EXT_METHOD
*const *b
);
72 static void ext_list_free(X509V3_EXT_METHOD
*ext
);
74 int X509V3_EXT_add(X509V3_EXT_METHOD
*ext
)
76 if (!ext_list
&& !(ext_list
= sk_X509V3_EXT_METHOD_new(ext_cmp
))) {
77 X509V3err(X509V3_F_X509V3_EXT_ADD
, ERR_R_MALLOC_FAILURE
);
80 if (!sk_X509V3_EXT_METHOD_push(ext_list
, ext
)) {
81 X509V3err(X509V3_F_X509V3_EXT_ADD
, ERR_R_MALLOC_FAILURE
);
87 static int ext_cmp(const X509V3_EXT_METHOD
*const *a
,
88 const X509V3_EXT_METHOD
*const *b
)
90 return ((*a
)->ext_nid
- (*b
)->ext_nid
);
93 DECLARE_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD
*,
94 const X509V3_EXT_METHOD
*, ext
);
95 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD
*,
96 const X509V3_EXT_METHOD
*, ext
);
98 const X509V3_EXT_METHOD
*X509V3_EXT_get_nid(int nid
)
100 X509V3_EXT_METHOD tmp
;
101 const X509V3_EXT_METHOD
*t
= &tmp
, *const *ret
;
106 ret
= OBJ_bsearch_ext(&t
, standard_exts
, STANDARD_EXTENSION_COUNT
);
111 idx
= sk_X509V3_EXT_METHOD_find(ext_list
, &tmp
);
114 return sk_X509V3_EXT_METHOD_value(ext_list
, idx
);
117 const X509V3_EXT_METHOD
*X509V3_EXT_get(X509_EXTENSION
*ext
)
120 if ((nid
= OBJ_obj2nid(X509_EXTENSION_get_object(ext
))) == NID_undef
)
122 return X509V3_EXT_get_nid(nid
);
125 int X509V3_EXT_add_list(X509V3_EXT_METHOD
*extlist
)
127 for (; extlist
->ext_nid
!= -1; extlist
++)
128 if (!X509V3_EXT_add(extlist
))
133 int X509V3_EXT_add_alias(int nid_to
, int nid_from
)
135 const X509V3_EXT_METHOD
*ext
;
136 X509V3_EXT_METHOD
*tmpext
;
138 if (!(ext
= X509V3_EXT_get_nid(nid_from
))) {
139 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
,
140 X509V3_R_EXTENSION_NOT_FOUND
);
143 if (!(tmpext
= OPENSSL_malloc(sizeof(X509V3_EXT_METHOD
)))) {
144 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
, ERR_R_MALLOC_FAILURE
);
148 tmpext
->ext_nid
= nid_to
;
149 tmpext
->ext_flags
|= X509V3_EXT_DYNAMIC
;
150 return X509V3_EXT_add(tmpext
);
153 void X509V3_EXT_cleanup(void)
155 sk_X509V3_EXT_METHOD_pop_free(ext_list
, ext_list_free
);
159 static void ext_list_free(X509V3_EXT_METHOD
*ext
)
161 if (ext
->ext_flags
& X509V3_EXT_DYNAMIC
)
166 * Legacy function: we don't need to add standard extensions any more because
167 * they are now kept in ext_dat.h.
170 int X509V3_add_standard_extensions(void)
175 /* Return an extension internal structure */
177 void *X509V3_EXT_d2i(X509_EXTENSION
*ext
)
179 const X509V3_EXT_METHOD
*method
;
180 const unsigned char *p
;
181 ASN1_STRING
*extvalue
;
184 if (!(method
= X509V3_EXT_get(ext
)))
186 extvalue
= X509_EXTENSION_get_data(ext
);
187 p
= ASN1_STRING_data(extvalue
);
188 extlen
= ASN1_STRING_length(extvalue
);
190 return ASN1_item_d2i(NULL
, &p
, extlen
, ASN1_ITEM_ptr(method
->it
));
191 return method
->d2i(NULL
, &p
, extlen
);
195 * Get critical flag and decoded version of extension from a NID.
196 * The "idx" variable returns the last found extension and can
197 * be used to retrieve multiple extensions of the same NID.
198 * However multiple extensions with the same NID is usually
199 * due to a badly encoded certificate so if idx is NULL we
200 * choke if multiple extensions exist.
201 * The "crit" variable is set to the critical value.
202 * The return value is the decoded extension or NULL on
203 * error. The actual error can have several different causes,
204 * the value of *crit reflects the cause:
205 * >= 0, extension found but not decoded (reflects critical value).
206 * -1 extension not found.
207 * -2 extension occurs more than once.
210 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION
) *x
, int nid
, int *crit
,
214 X509_EXTENSION
*ex
, *found_ex
= NULL
;
228 for (i
= lastpos
; i
< sk_X509_EXTENSION_num(x
); i
++) {
229 ex
= sk_X509_EXTENSION_value(x
, i
);
230 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex
)) == nid
) {
235 } else if (found_ex
) {
236 /* Found more than one */
247 *crit
= X509_EXTENSION_get_critical(found_ex
);
248 return X509V3_EXT_d2i(found_ex
);
251 /* Extension not found */
260 * This function is a general extension append, replace and delete utility.
261 * The precise operation is governed by the 'flags' value. The 'crit' and
262 * 'value' arguments (if relevant) are the extensions internal structure.
265 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION
) **x
, int nid
, void *value
,
266 int crit
, unsigned long flags
)
270 X509_EXTENSION
*ext
, *extmp
;
271 unsigned long ext_op
= flags
& X509V3_ADD_OP_MASK
;
274 * If appending we don't care if it exists, otherwise look for existing
277 if (ext_op
!= X509V3_ADD_APPEND
)
278 extidx
= X509v3_get_ext_by_NID(*x
, nid
, -1);
280 /* See if extension exists */
282 /* If keep existing, nothing to do */
283 if (ext_op
== X509V3_ADD_KEEP_EXISTING
)
285 /* If default then its an error */
286 if (ext_op
== X509V3_ADD_DEFAULT
) {
287 errcode
= X509V3_R_EXTENSION_EXISTS
;
290 /* If delete, just delete it */
291 if (ext_op
== X509V3_ADD_DELETE
) {
292 if (!sk_X509_EXTENSION_delete(*x
, extidx
))
298 * If replace existing or delete, error since extension must exist
300 if ((ext_op
== X509V3_ADD_REPLACE_EXISTING
) ||
301 (ext_op
== X509V3_ADD_DELETE
)) {
302 errcode
= X509V3_R_EXTENSION_NOT_FOUND
;
308 * If we get this far then we have to create an extension: could have
309 * some flags for alternative encoding schemes...
312 ext
= X509V3_EXT_i2d(nid
, crit
, value
);
315 X509V3err(X509V3_F_X509V3_ADD1_I2D
,
316 X509V3_R_ERROR_CREATING_EXTENSION
);
320 /* If extension exists replace it.. */
322 extmp
= sk_X509_EXTENSION_value(*x
, extidx
);
323 X509_EXTENSION_free(extmp
);
324 if (!sk_X509_EXTENSION_set(*x
, extidx
, ext
))
329 if (!*x
&& !(*x
= sk_X509_EXTENSION_new_null()))
331 if (!sk_X509_EXTENSION_push(*x
, ext
))
337 if (!(flags
& X509V3_ADD_SILENT
))
338 X509V3err(X509V3_F_X509V3_ADD1_I2D
, errcode
);