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(X509_EXTENSION_get_object(ext))) == 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 const X509V3_EXT_METHOD *ext;
136 X509V3_EXT_METHOD *tmpext;
138 if (!(ext = X509V3_EXT_get_nid(nid_from))) {
139 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,
140 X509V3_R_EXTENSION_NOT_FOUND);
145 (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {
146 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS, ERR_R_MALLOC_FAILURE);
150 tmpext->ext_nid = nid_to;
151 tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
152 return X509V3_EXT_add(tmpext);
155 void X509V3_EXT_cleanup(void)
157 sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
161 static void ext_list_free(X509V3_EXT_METHOD *ext)
163 if (ext->ext_flags & X509V3_EXT_DYNAMIC)
168 * Legacy function: we don't need to add standard extensions any more because
169 * they are now kept in ext_dat.h.
172 int X509V3_add_standard_extensions(void)
177 /* Return an extension internal structure */
179 void *X509V3_EXT_d2i(X509_EXTENSION *ext)
181 const X509V3_EXT_METHOD *method;
182 const unsigned char *p;
183 ASN1_STRING *extvalue;
186 if (!(method = X509V3_EXT_get(ext)))
188 extvalue = X509_EXTENSION_get_data(ext);
189 p = ASN1_STRING_data(extvalue);
190 extlen = ASN1_STRING_length(extvalue);
192 return ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
193 return method->d2i(NULL, &p, extlen);
197 * Get critical flag and decoded version of extension from a NID.
198 * The "idx" variable returns the last found extension and can
199 * be used to retrieve multiple extensions of the same NID.
200 * However multiple extensions with the same NID is usually
201 * due to a badly encoded certificate so if idx is NULL we
202 * choke if multiple extensions exist.
203 * The "crit" variable is set to the critical value.
204 * The return value is the decoded extension or NULL on
205 * error. The actual error can have several different causes,
206 * the value of *crit reflects the cause:
207 * >= 0, extension found but not decoded (reflects critical value).
208 * -1 extension not found.
209 * -2 extension occurs more than once.
212 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit,
216 X509_EXTENSION *ex, *found_ex = NULL;
230 for (i = lastpos; i < sk_X509_EXTENSION_num(x); i++) {
231 ex = sk_X509_EXTENSION_value(x, i);
232 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex)) == nid) {
237 } else if (found_ex) {
238 /* Found more than one */
249 *crit = X509_EXTENSION_get_critical(found_ex);
250 return X509V3_EXT_d2i(found_ex);
253 /* Extension not found */
262 * This function is a general extension append, replace and delete utility.
263 * The precise operation is governed by the 'flags' value. The 'crit' and
264 * 'value' arguments (if relevant) are the extensions internal structure.
267 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
268 int crit, unsigned long flags)
272 X509_EXTENSION *ext, *extmp;
273 unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
276 * If appending we don't care if it exists, otherwise look for existing
279 if (ext_op != X509V3_ADD_APPEND)
280 extidx = X509v3_get_ext_by_NID(*x, nid, -1);
282 /* See if extension exists */
284 /* If keep existing, nothing to do */
285 if (ext_op == X509V3_ADD_KEEP_EXISTING)
287 /* If default then its an error */
288 if (ext_op == X509V3_ADD_DEFAULT) {
289 errcode = X509V3_R_EXTENSION_EXISTS;
292 /* If delete, just delete it */
293 if (ext_op == X509V3_ADD_DELETE) {
294 if (!sk_X509_EXTENSION_delete(*x, extidx))
300 * If replace existing or delete, error since extension must exist
302 if ((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
303 (ext_op == X509V3_ADD_DELETE)) {
304 errcode = X509V3_R_EXTENSION_NOT_FOUND;
310 * If we get this far then we have to create an extension: could have
311 * some flags for alternative encoding schemes...
314 ext = X509V3_EXT_i2d(nid, crit, value);
317 X509V3err(X509V3_F_X509V3_ADD1_I2D,
318 X509V3_R_ERROR_CREATING_EXTENSION);
322 /* If extension exists replace it.. */
324 extmp = sk_X509_EXTENSION_value(*x, extidx);
325 X509_EXTENSION_free(extmp);
326 if (!sk_X509_EXTENSION_set(*x, extidx, ext))
331 if (!*x && !(*x = sk_X509_EXTENSION_new_null()))
333 if (!sk_X509_EXTENSION_push(*x, ext))
339 if (!(flags & X509V3_ADD_SILENT))
340 X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);