2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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 */
61 #include "internal/cryptlib.h"
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)
76 && (ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp)) == NULL) {
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);
99 * This table will be searched using OBJ_bsearch so it *must* kept in order
100 * of the ext_nid values.
103 static const X509V3_EXT_METHOD *standard_exts[] = {
114 &v3_pkey_usage_period,
125 #ifndef OPENSSL_NO_OCSP
130 #ifndef OPENSSL_NO_RFC3779
134 #ifndef OPENSSL_NO_OCSP
143 &v3_policy_constraints,
144 #ifndef OPENSSL_NO_OCSP
148 &v3_name_constraints,
154 #ifndef OPENSSL_NO_CT
162 /* Number of standard extensions */
164 #define STANDARD_EXTENSION_COUNT OSSL_NELEM(standard_exts)
166 const X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
168 X509V3_EXT_METHOD tmp;
169 const X509V3_EXT_METHOD *t = &tmp, *const *ret;
174 ret = OBJ_bsearch_ext(&t, standard_exts, STANDARD_EXTENSION_COUNT);
179 idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);
182 return sk_X509V3_EXT_METHOD_value(ext_list, idx);
185 const X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)
188 if ((nid = OBJ_obj2nid(X509_EXTENSION_get_object(ext))) == NID_undef)
190 return X509V3_EXT_get_nid(nid);
193 int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
195 for (; extlist->ext_nid != -1; extlist++)
196 if (!X509V3_EXT_add(extlist))
201 int X509V3_EXT_add_alias(int nid_to, int nid_from)
203 const X509V3_EXT_METHOD *ext;
204 X509V3_EXT_METHOD *tmpext;
206 if ((ext = X509V3_EXT_get_nid(nid_from)) == NULL) {
207 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS, X509V3_R_EXTENSION_NOT_FOUND);
210 if ((tmpext = OPENSSL_malloc(sizeof(*tmpext))) == NULL) {
211 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS, ERR_R_MALLOC_FAILURE);
215 tmpext->ext_nid = nid_to;
216 tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
217 return X509V3_EXT_add(tmpext);
220 void X509V3_EXT_cleanup(void)
222 sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
226 static void ext_list_free(X509V3_EXT_METHOD *ext)
228 if (ext->ext_flags & X509V3_EXT_DYNAMIC)
233 * Legacy function: we don't need to add standard extensions any more because
234 * they are now kept in ext_dat.h.
237 int X509V3_add_standard_extensions(void)
242 /* Return an extension internal structure */
244 void *X509V3_EXT_d2i(X509_EXTENSION *ext)
246 const X509V3_EXT_METHOD *method;
247 const unsigned char *p;
248 ASN1_STRING *extvalue;
251 if ((method = X509V3_EXT_get(ext)) == NULL)
253 extvalue = X509_EXTENSION_get_data(ext);
254 p = ASN1_STRING_data(extvalue);
255 extlen = ASN1_STRING_length(extvalue);
257 return ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
258 return method->d2i(NULL, &p, extlen);
262 * Get critical flag and decoded version of extension from a NID.
263 * The "idx" variable returns the last found extension and can
264 * be used to retrieve multiple extensions of the same NID.
265 * However multiple extensions with the same NID is usually
266 * due to a badly encoded certificate so if idx is NULL we
267 * choke if multiple extensions exist.
268 * The "crit" variable is set to the critical value.
269 * The return value is the decoded extension or NULL on
270 * error. The actual error can have several different causes,
271 * the value of *crit reflects the cause:
272 * >= 0, extension found but not decoded (reflects critical value).
273 * -1 extension not found.
274 * -2 extension occurs more than once.
277 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit,
281 X509_EXTENSION *ex, *found_ex = NULL;
295 for (i = lastpos; i < sk_X509_EXTENSION_num(x); i++) {
296 ex = sk_X509_EXTENSION_value(x, i);
297 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex)) == nid) {
302 } else if (found_ex) {
303 /* Found more than one */
314 *crit = X509_EXTENSION_get_critical(found_ex);
315 return X509V3_EXT_d2i(found_ex);
318 /* Extension not found */
327 * This function is a general extension append, replace and delete utility.
328 * The precise operation is governed by the 'flags' value. The 'crit' and
329 * 'value' arguments (if relevant) are the extensions internal structure.
332 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
333 int crit, unsigned long flags)
337 X509_EXTENSION *ext, *extmp;
338 unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
341 * If appending we don't care if it exists, otherwise look for existing
344 if (ext_op != X509V3_ADD_APPEND)
345 extidx = X509v3_get_ext_by_NID(*x, nid, -1);
347 /* See if extension exists */
349 /* If keep existing, nothing to do */
350 if (ext_op == X509V3_ADD_KEEP_EXISTING)
352 /* If default then its an error */
353 if (ext_op == X509V3_ADD_DEFAULT) {
354 errcode = X509V3_R_EXTENSION_EXISTS;
357 /* If delete, just delete it */
358 if (ext_op == X509V3_ADD_DELETE) {
359 if (!sk_X509_EXTENSION_delete(*x, extidx))
365 * If replace existing or delete, error since extension must exist
367 if ((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
368 (ext_op == X509V3_ADD_DELETE)) {
369 errcode = X509V3_R_EXTENSION_NOT_FOUND;
375 * If we get this far then we have to create an extension: could have
376 * some flags for alternative encoding schemes...
379 ext = X509V3_EXT_i2d(nid, crit, value);
382 X509V3err(X509V3_F_X509V3_ADD1_I2D,
383 X509V3_R_ERROR_CREATING_EXTENSION);
387 /* If extension exists replace it.. */
389 extmp = sk_X509_EXTENSION_value(*x, extidx);
390 X509_EXTENSION_free(extmp);
391 if (!sk_X509_EXTENSION_set(*x, extidx, ext))
397 && (*x = sk_X509_EXTENSION_new_null()) == NULL)
399 if (!sk_X509_EXTENSION_push(*x, ext))
405 if (!(flags & X509V3_ADD_SILENT))
406 X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);