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 X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
95 X509V3_EXT_METHOD tmp, *t = &tmp, **ret;
100 ret = (X509V3_EXT_METHOD **)OBJ_bsearch((char *)&t,
101 (char *)standard_exts,
102 STANDARD_EXTENSION_COUNT,
103 sizeof(X509V3_EXT_METHOD *),
106 const void *))ext_cmp);
111 idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);
114 return sk_X509V3_EXT_METHOD_value(ext_list, idx);
117 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_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 X509V3_EXT_METHOD *ext, *tmpext;
136 if (!(ext = X509V3_EXT_get_nid(nid_from))) {
137 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,
138 X509V3_R_EXTENSION_NOT_FOUND);
143 (X509V3_EXT_METHOD *)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 X509V3_EXT_METHOD *method;
180 const unsigned char *p;
182 if (!(method = X509V3_EXT_get(ext)))
184 p = ext->value->data;
186 return ASN1_item_d2i(NULL, &p, ext->value->length,
187 ASN1_ITEM_ptr(method->it));
188 return method->d2i(NULL, &p, ext->value->length);
192 * Get critical flag and decoded version of extension from a NID.
193 * The "idx" variable returns the last found extension and can
194 * be used to retrieve multiple extensions of the same NID.
195 * However multiple extensions with the same NID is usually
196 * due to a badly encoded certificate so if idx is NULL we
197 * choke if multiple extensions exist.
198 * The "crit" variable is set to the critical value.
199 * The return value is the decoded extension or NULL on
200 * error. The actual error can have several different causes,
201 * the value of *crit reflects the cause:
202 * >= 0, extension found but not decoded (reflects critical value).
203 * -1 extension not found.
204 * -2 extension occurs more than once.
207 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit,
211 X509_EXTENSION *ex, *found_ex = NULL;
225 for (i = lastpos; i < sk_X509_EXTENSION_num(x); i++) {
226 ex = sk_X509_EXTENSION_value(x, i);
227 if (OBJ_obj2nid(ex->object) == nid) {
232 } else if (found_ex) {
233 /* Found more than one */
244 *crit = X509_EXTENSION_get_critical(found_ex);
245 return X509V3_EXT_d2i(found_ex);
248 /* Extension not found */
257 * This function is a general extension append, replace and delete utility.
258 * The precise operation is governed by the 'flags' value. The 'crit' and
259 * 'value' arguments (if relevant) are the extensions internal structure.
262 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
263 int crit, unsigned long flags)
267 X509_EXTENSION *ext, *extmp;
268 unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
271 * If appending we don't care if it exists, otherwise look for existing
274 if (ext_op != X509V3_ADD_APPEND)
275 extidx = X509v3_get_ext_by_NID(*x, nid, -1);
277 /* See if extension exists */
279 /* If keep existing, nothing to do */
280 if (ext_op == X509V3_ADD_KEEP_EXISTING)
282 /* If default then its an error */
283 if (ext_op == X509V3_ADD_DEFAULT) {
284 errcode = X509V3_R_EXTENSION_EXISTS;
287 /* If delete, just delete it */
288 if (ext_op == X509V3_ADD_DELETE) {
289 if (!sk_X509_EXTENSION_delete(*x, extidx))
295 * If replace existing or delete, error since extension must exist
297 if ((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
298 (ext_op == X509V3_ADD_DELETE)) {
299 errcode = X509V3_R_EXTENSION_NOT_FOUND;
305 * If we get this far then we have to create an extension: could have
306 * some flags for alternative encoding schemes...
309 ext = X509V3_EXT_i2d(nid, crit, value);
312 X509V3err(X509V3_F_X509V3_ADD1_I2D,
313 X509V3_R_ERROR_CREATING_EXTENSION);
317 /* If extension exists replace it.. */
319 extmp = sk_X509_EXTENSION_value(*x, extidx);
320 X509_EXTENSION_free(extmp);
321 if (!sk_X509_EXTENSION_set(*x, extidx, ext))
326 if (!*x && !(*x = sk_X509_EXTENSION_new_null()))
328 if (!sk_X509_EXTENSION_push(*x, ext))
334 if (!(flags & X509V3_ADD_SILENT))
335 X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);
339 IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)