1 /* $OpenBSD: v3_lib.c,v 1.13 2014/07/11 08:44:49 jsing 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).
58 /* X509 v3 extension utilities */
62 #include <openssl/conf.h>
63 #include <openssl/err.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);
75 X509V3_EXT_add(X509V3_EXT_METHOD *ext)
77 if (!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) {
78 X509V3err(X509V3_F_X509V3_EXT_ADD, ERR_R_MALLOC_FAILURE);
81 if (!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {
82 X509V3err(X509V3_F_X509V3_EXT_ADD, ERR_R_MALLOC_FAILURE);
89 ext_cmp(const X509V3_EXT_METHOD * const *a, const X509V3_EXT_METHOD * const *b)
91 return ((*a)->ext_nid - (*b)->ext_nid);
94 DECLARE_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD *,
95 const X509V3_EXT_METHOD *, ext);
96 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD *,
97 const X509V3_EXT_METHOD *, ext);
99 const X509V3_EXT_METHOD *
100 X509V3_EXT_get_nid(int nid)
102 X509V3_EXT_METHOD tmp;
103 const X509V3_EXT_METHOD *t = &tmp, * const *ret;
109 ret = OBJ_bsearch_ext(&t, standard_exts, STANDARD_EXTENSION_COUNT);
114 idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);
117 return sk_X509V3_EXT_METHOD_value(ext_list, idx);
120 const X509V3_EXT_METHOD *
121 X509V3_EXT_get(X509_EXTENSION *ext)
125 if ((nid = OBJ_obj2nid(ext->object)) == NID_undef)
127 return X509V3_EXT_get_nid(nid);
131 X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
133 for (; extlist->ext_nid!=-1; extlist++)
134 if (!X509V3_EXT_add(extlist))
140 X509V3_EXT_add_alias(int nid_to, int nid_from)
142 const X509V3_EXT_METHOD *ext;
143 X509V3_EXT_METHOD *tmpext;
145 if (!(ext = X509V3_EXT_get_nid(nid_from))) {
146 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,
147 X509V3_R_EXTENSION_NOT_FOUND);
150 if (!(tmpext = malloc(sizeof(X509V3_EXT_METHOD)))) {
151 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS, ERR_R_MALLOC_FAILURE);
155 tmpext->ext_nid = nid_to;
156 tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
157 return X509V3_EXT_add(tmpext);
161 X509V3_EXT_cleanup(void)
163 sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
168 ext_list_free(X509V3_EXT_METHOD *ext)
170 if (ext->ext_flags & X509V3_EXT_DYNAMIC)
174 /* Legacy function: we don't need to add standard extensions
175 * any more because they are now kept in ext_dat.h.
179 X509V3_add_standard_extensions(void)
184 /* Return an extension internal structure */
187 X509V3_EXT_d2i(X509_EXTENSION *ext)
189 const X509V3_EXT_METHOD *method;
190 const unsigned char *p;
192 if (!(method = X509V3_EXT_get(ext)))
194 p = ext->value->data;
196 return ASN1_item_d2i(NULL, &p, ext->value->length,
197 ASN1_ITEM_ptr(method->it));
198 return method->d2i(NULL, &p, ext->value->length);
201 /* Get critical flag and decoded version of extension from a NID.
202 * The "idx" variable returns the last found extension and can
203 * be used to retrieve multiple extensions of the same NID.
204 * However multiple extensions with the same NID is usually
205 * due to a badly encoded certificate so if idx is NULL we
206 * choke if multiple extensions exist.
207 * The "crit" variable is set to the critical value.
208 * The return value is the decoded extension or NULL on
209 * error. The actual error can have several different causes,
210 * the value of *crit reflects the cause:
211 * >= 0, extension found but not decoded (reflects critical value).
212 * -1 extension not found.
213 * -2 extension occurs more than once.
217 X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx)
220 X509_EXTENSION *ex, *found_ex = NULL;
235 for (i = lastpos; i < sk_X509_EXTENSION_num(x); i++) {
236 ex = sk_X509_EXTENSION_value(x, i);
237 if (OBJ_obj2nid(ex->object) == nid) {
242 } else if (found_ex) {
243 /* Found more than one */
254 *crit = X509_EXTENSION_get_critical(found_ex);
255 return X509V3_EXT_d2i(found_ex);
258 /* Extension not found */
266 /* This function is a general extension append, replace and delete utility.
267 * The precise operation is governed by the 'flags' value. The 'crit' and
268 * 'value' arguments (if relevant) are the extensions internal structure.
272 X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
273 int crit, unsigned long flags)
277 X509_EXTENSION *ext, *extmp;
278 unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
280 /* If appending we don't care if it exists, otherwise
281 * look for existing extension.
283 if (ext_op != X509V3_ADD_APPEND)
284 extidx = X509v3_get_ext_by_NID(*x, nid, -1);
286 /* See if extension exists */
288 /* If keep existing, nothing to do */
289 if (ext_op == X509V3_ADD_KEEP_EXISTING)
291 /* If default then its an error */
292 if (ext_op == X509V3_ADD_DEFAULT) {
293 errcode = X509V3_R_EXTENSION_EXISTS;
296 /* If delete, just delete it */
297 if (ext_op == X509V3_ADD_DELETE) {
298 if (!sk_X509_EXTENSION_delete(*x, extidx))
303 /* If replace existing or delete, error since
304 * extension must exist
306 if ((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
307 (ext_op == X509V3_ADD_DELETE)) {
308 errcode = X509V3_R_EXTENSION_NOT_FOUND;
313 /* If we get this far then we have to create an extension:
314 * could have some flags for alternative encoding schemes...
317 ext = X509V3_EXT_i2d(nid, crit, value);
320 X509V3err(X509V3_F_X509V3_ADD1_I2D,
321 X509V3_R_ERROR_CREATING_EXTENSION);
325 /* If extension exists replace it.. */
327 extmp = sk_X509_EXTENSION_value(*x, extidx);
328 X509_EXTENSION_free(extmp);
329 if (!sk_X509_EXTENSION_set(*x, extidx, ext))
334 if (!*x && !(*x = sk_X509_EXTENSION_new_null()))
336 if (!sk_X509_EXTENSION_push(*x, ext))
342 if (!(flags & X509V3_ADD_SILENT))
343 X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);