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).
58 /* X509 v3 extension utilities */
62 #include <openssl/conf.h>
63 #include <openssl/x509v3.h>
67 static STACK_OF(X509V3_EXT_METHOD
) *ext_list
= NULL
;
69 static int ext_cmp(const X509V3_EXT_METHOD
* const *a
,
70 const X509V3_EXT_METHOD
* const *b
);
71 static void ext_list_free(X509V3_EXT_METHOD
*ext
);
73 int X509V3_EXT_add(X509V3_EXT_METHOD
*ext
)
75 if(!ext_list
&& !(ext_list
= sk_X509V3_EXT_METHOD_new(ext_cmp
))) {
76 X509V3err(X509V3_F_X509V3_EXT_ADD
,ERR_R_MALLOC_FAILURE
);
79 if(!sk_X509V3_EXT_METHOD_push(ext_list
, ext
)) {
80 X509V3err(X509V3_F_X509V3_EXT_ADD
,ERR_R_MALLOC_FAILURE
);
86 static int ext_cmp(const X509V3_EXT_METHOD
* const *a
,
87 const X509V3_EXT_METHOD
* const *b
)
89 return ((*a
)->ext_nid
- (*b
)->ext_nid
);
92 X509V3_EXT_METHOD
*X509V3_EXT_get_nid(int nid
)
94 X509V3_EXT_METHOD tmp
, *t
= &tmp
, **ret
;
96 if(nid
< 0) return NULL
;
98 ret
= (X509V3_EXT_METHOD
**) OBJ_bsearch((char *)&t
,
99 (char *)standard_exts
, STANDARD_EXTENSION_COUNT
,
100 sizeof(X509V3_EXT_METHOD
*), (int (*)(const void *, const void *))ext_cmp
);
102 if(!ext_list
) return NULL
;
103 idx
= sk_X509V3_EXT_METHOD_find(ext_list
, &tmp
);
104 if(idx
== -1) return NULL
;
105 return sk_X509V3_EXT_METHOD_value(ext_list
, idx
);
108 X509V3_EXT_METHOD
*X509V3_EXT_get(X509_EXTENSION
*ext
)
111 if((nid
= OBJ_obj2nid(ext
->object
)) == NID_undef
) return NULL
;
112 return X509V3_EXT_get_nid(nid
);
116 int X509V3_EXT_add_list(X509V3_EXT_METHOD
*extlist
)
118 for(;extlist
->ext_nid
!=-1;extlist
++)
119 if(!X509V3_EXT_add(extlist
)) return 0;
123 int X509V3_EXT_add_alias(int nid_to
, int nid_from
)
125 X509V3_EXT_METHOD
*ext
, *tmpext
;
126 if(!(ext
= X509V3_EXT_get_nid(nid_from
))) {
127 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
,X509V3_R_EXTENSION_NOT_FOUND
);
130 if(!(tmpext
= (X509V3_EXT_METHOD
*)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD
)))) {
131 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
,ERR_R_MALLOC_FAILURE
);
135 tmpext
->ext_nid
= nid_to
;
136 tmpext
->ext_flags
|= X509V3_EXT_DYNAMIC
;
137 return X509V3_EXT_add(tmpext
);
140 void X509V3_EXT_cleanup(void)
142 sk_X509V3_EXT_METHOD_pop_free(ext_list
, ext_list_free
);
146 static void ext_list_free(X509V3_EXT_METHOD
*ext
)
148 if(ext
->ext_flags
& X509V3_EXT_DYNAMIC
) OPENSSL_free(ext
);
151 /* Legacy function: we don't need to add standard extensions
152 * any more because they are now kept in ext_dat.h.
155 int X509V3_add_standard_extensions(void)
160 /* Return an extension internal structure */
162 void *X509V3_EXT_d2i(X509_EXTENSION
*ext
)
164 X509V3_EXT_METHOD
*method
;
166 if(!(method
= X509V3_EXT_get(ext
))) return NULL
;
167 p
= ext
->value
->data
;
168 if(method
->it
) return ASN1_item_d2i(NULL
, &p
, ext
->value
->length
, ASN1_ITEM_ptr(method
->it
));
169 return method
->d2i(NULL
, &p
, ext
->value
->length
);
172 /* Get critical flag and decoded version of extension from a NID.
173 * The "idx" variable returns the last found extension and can
174 * be used to retrieve multiple extensions of the same NID.
175 * However multiple extensions with the same NID is usually
176 * due to a badly encoded certificate so if idx is NULL we
177 * choke if multiple extensions exist.
178 * The "crit" variable is set to the critical value.
179 * The return value is the decoded extension or NULL on
180 * error. The actual error can have several different causes,
181 * the value of *crit reflects the cause:
182 * >= 0, extension found but not decoded (reflects critical value).
183 * -1 extension not found.
184 * -2 extension occurs more than once.
187 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION
) *x
, int nid
, int *crit
, int *idx
)
190 X509_EXTENSION
*ex
, *found_ex
= NULL
;
196 if(idx
) lastpos
= *idx
+ 1;
198 if(lastpos
< 0) lastpos
= 0;
199 for(i
= lastpos
; i
< sk_X509_EXTENSION_num(x
); i
++)
201 ex
= sk_X509_EXTENSION_value(x
, i
);
202 if(OBJ_obj2nid(ex
->object
) == nid
) {
206 } else if(found_ex
) {
207 /* Found more than one */
216 if(crit
) *crit
= X509_EXTENSION_get_critical(found_ex
);
217 return X509V3_EXT_d2i(found_ex
);
220 /* Extension not found */
226 /* This function is a general extension append, replace and delete utility.
227 * The precise operation is governed by the 'flags' value. The 'crit' and
228 * 'value' arguments (if relevant) are the extensions internal structure.
231 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION
) **x
, int nid
, void *value
,
232 int crit
, unsigned long flags
)
236 X509_EXTENSION
*ext
, *extmp
;
237 unsigned long ext_op
= flags
& X509V3_ADD_OP_MASK
;
239 /* If appending we don't care if it exists, otherwise
240 * look for existing extension.
242 if(ext_op
!= X509V3_ADD_APPEND
)
243 extidx
= X509v3_get_ext_by_NID(*x
, nid
, -1);
245 /* See if extension exists */
247 /* If keep existing, nothing to do */
248 if(ext_op
== X509V3_ADD_KEEP_EXISTING
)
250 /* If default then its an error */
251 if(ext_op
== X509V3_ADD_DEFAULT
) {
252 errcode
= X509V3_R_EXTENSION_EXISTS
;
255 /* If delete, just delete it */
256 if(ext_op
== X509V3_ADD_DELETE
) {
257 if(!sk_X509_EXTENSION_delete(*x
, extidx
)) return -1;
261 /* If replace existing or delete, error since
262 * extension must exist
264 if((ext_op
== X509V3_ADD_REPLACE_EXISTING
) ||
265 (ext_op
== X509V3_ADD_DELETE
)) {
266 errcode
= X509V3_R_EXTENSION_NOT_FOUND
;
271 /* If we get this far then we have to create an extension:
272 * could have some flags for alternative encoding schemes...
275 ext
= X509V3_EXT_i2d(nid
, crit
, value
);
278 X509V3err(X509V3_F_X509V3_ADD_I2D
, X509V3_R_ERROR_CREATING_EXTENSION
);
282 /* If extension exists replace it.. */
284 extmp
= sk_X509_EXTENSION_value(*x
, extidx
);
285 X509_EXTENSION_free(extmp
);
286 if(!sk_X509_EXTENSION_set(*x
, extidx
, ext
)) return -1;
290 if(!*x
&& !(*x
= sk_X509_EXTENSION_new_null())) return -1;
291 if(!sk_X509_EXTENSION_push(*x
, ext
)) return -1;
296 if(!(flags
& X509V3_ADD_SILENT
))
297 X509V3err(X509V3_F_X509V3_ADD_I2D
, errcode
);
301 IMPLEMENT_STACK_OF(X509V3_EXT_METHOD
)