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(ext
->object
)) == NID_undef
)
122 return X509V3_EXT_get_nid(nid
);
125 int X509V3_EXT_free(int nid
, void *ext_data
)
127 const X509V3_EXT_METHOD
*ext_method
= X509V3_EXT_get_nid(nid
);
128 if (ext_method
== NULL
) {
129 X509V3err(X509V3_F_X509V3_EXT_FREE
,
130 X509V3_R_CANNOT_FIND_FREE_FUNCTION
);
134 if (ext_method
->it
!= NULL
)
135 ASN1_item_free(ext_data
, ASN1_ITEM_ptr(ext_method
->it
));
136 else if (ext_method
->ext_free
!= NULL
)
137 ext_method
->ext_free(ext_data
);
139 X509V3err(X509V3_F_X509V3_EXT_FREE
,
140 X509V3_R_CANNOT_FIND_FREE_FUNCTION
);
147 int X509V3_EXT_add_list(X509V3_EXT_METHOD
*extlist
)
149 for (; extlist
->ext_nid
!= -1; extlist
++)
150 if (!X509V3_EXT_add(extlist
))
155 int X509V3_EXT_add_alias(int nid_to
, int nid_from
)
157 const X509V3_EXT_METHOD
*ext
;
158 X509V3_EXT_METHOD
*tmpext
;
160 if (!(ext
= X509V3_EXT_get_nid(nid_from
))) {
161 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
,
162 X509V3_R_EXTENSION_NOT_FOUND
);
167 (X509V3_EXT_METHOD
*)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD
)))) {
168 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
, ERR_R_MALLOC_FAILURE
);
172 tmpext
->ext_nid
= nid_to
;
173 tmpext
->ext_flags
|= X509V3_EXT_DYNAMIC
;
174 return X509V3_EXT_add(tmpext
);
177 void X509V3_EXT_cleanup(void)
179 sk_X509V3_EXT_METHOD_pop_free(ext_list
, ext_list_free
);
183 static void ext_list_free(X509V3_EXT_METHOD
*ext
)
185 if (ext
->ext_flags
& X509V3_EXT_DYNAMIC
)
190 * Legacy function: we don't need to add standard extensions any more because
191 * they are now kept in ext_dat.h.
194 int X509V3_add_standard_extensions(void)
199 /* Return an extension internal structure */
201 void *X509V3_EXT_d2i(X509_EXTENSION
*ext
)
203 const X509V3_EXT_METHOD
*method
;
204 const unsigned char *p
;
206 if (!(method
= X509V3_EXT_get(ext
)))
208 p
= ext
->value
->data
;
210 return ASN1_item_d2i(NULL
, &p
, ext
->value
->length
,
211 ASN1_ITEM_ptr(method
->it
));
212 return method
->d2i(NULL
, &p
, ext
->value
->length
);
216 * Get critical flag and decoded version of extension from a NID.
217 * The "idx" variable returns the last found extension and can
218 * be used to retrieve multiple extensions of the same NID.
219 * However multiple extensions with the same NID is usually
220 * due to a badly encoded certificate so if idx is NULL we
221 * choke if multiple extensions exist.
222 * The "crit" variable is set to the critical value.
223 * The return value is the decoded extension or NULL on
224 * error. The actual error can have several different causes,
225 * the value of *crit reflects the cause:
226 * >= 0, extension found but not decoded (reflects critical value).
227 * -1 extension not found.
228 * -2 extension occurs more than once.
231 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION
) *x
, int nid
, int *crit
,
235 X509_EXTENSION
*ex
, *found_ex
= NULL
;
249 for (i
= lastpos
; i
< sk_X509_EXTENSION_num(x
); i
++) {
250 ex
= sk_X509_EXTENSION_value(x
, i
);
251 if (OBJ_obj2nid(ex
->object
) == nid
) {
256 } else if (found_ex
) {
257 /* Found more than one */
268 *crit
= X509_EXTENSION_get_critical(found_ex
);
269 return X509V3_EXT_d2i(found_ex
);
272 /* Extension not found */
281 * This function is a general extension append, replace and delete utility.
282 * The precise operation is governed by the 'flags' value. The 'crit' and
283 * 'value' arguments (if relevant) are the extensions internal structure.
286 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION
) **x
, int nid
, void *value
,
287 int crit
, unsigned long flags
)
291 X509_EXTENSION
*ext
, *extmp
;
292 unsigned long ext_op
= flags
& X509V3_ADD_OP_MASK
;
295 * If appending we don't care if it exists, otherwise look for existing
298 if (ext_op
!= X509V3_ADD_APPEND
)
299 extidx
= X509v3_get_ext_by_NID(*x
, nid
, -1);
301 /* See if extension exists */
303 /* If keep existing, nothing to do */
304 if (ext_op
== X509V3_ADD_KEEP_EXISTING
)
306 /* If default then its an error */
307 if (ext_op
== X509V3_ADD_DEFAULT
) {
308 errcode
= X509V3_R_EXTENSION_EXISTS
;
311 /* If delete, just delete it */
312 if (ext_op
== X509V3_ADD_DELETE
) {
313 if (!sk_X509_EXTENSION_delete(*x
, extidx
))
319 * If replace existing or delete, error since extension must exist
321 if ((ext_op
== X509V3_ADD_REPLACE_EXISTING
) ||
322 (ext_op
== X509V3_ADD_DELETE
)) {
323 errcode
= X509V3_R_EXTENSION_NOT_FOUND
;
329 * If we get this far then we have to create an extension: could have
330 * some flags for alternative encoding schemes...
333 ext
= X509V3_EXT_i2d(nid
, crit
, value
);
336 X509V3err(X509V3_F_X509V3_ADD1_I2D
,
337 X509V3_R_ERROR_CREATING_EXTENSION
);
341 /* If extension exists replace it.. */
343 extmp
= sk_X509_EXTENSION_value(*x
, extidx
);
344 X509_EXTENSION_free(extmp
);
345 if (!sk_X509_EXTENSION_set(*x
, extidx
, ext
))
350 if (!*x
&& !(*x
= sk_X509_EXTENSION_new_null()))
352 if (!sk_X509_EXTENSION_push(*x
, ext
))
358 if (!(flags
& X509V3_ADD_SILENT
))
359 X509V3err(X509V3_F_X509V3_ADD1_I2D
, errcode
);
363 IMPLEMENT_STACK_OF(X509V3_EXT_METHOD
)