Line data Source code
1 : /* v3_lib.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 1999.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
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
19 : * distribution.
20 : *
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/)"
25 : *
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.
30 : *
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.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
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 : * ====================================================================
53 : *
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).
57 : *
58 : */
59 : /* X509 v3 extension utilities */
60 :
61 : #include <stdio.h>
62 : #include "cryptlib.h"
63 : #include <openssl/conf.h>
64 : #include <openssl/x509v3.h>
65 :
66 : #include "ext_dat.h"
67 :
68 : static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL;
69 :
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);
73 :
74 0 : int X509V3_EXT_add(X509V3_EXT_METHOD *ext)
75 : {
76 0 : if (!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) {
77 0 : X509V3err(X509V3_F_X509V3_EXT_ADD, ERR_R_MALLOC_FAILURE);
78 0 : return 0;
79 : }
80 0 : if (!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {
81 0 : X509V3err(X509V3_F_X509V3_EXT_ADD, ERR_R_MALLOC_FAILURE);
82 0 : return 0;
83 : }
84 : return 1;
85 : }
86 :
87 0 : static int ext_cmp(const X509V3_EXT_METHOD *const *a,
88 : const X509V3_EXT_METHOD *const *b)
89 : {
90 15423 : return ((*a)->ext_nid - (*b)->ext_nid);
91 : }
92 :
93 : DECLARE_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD *,
94 : const X509V3_EXT_METHOD *, ext);
95 33770 : IMPLEMENT_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD *,
96 : const X509V3_EXT_METHOD *, ext);
97 :
98 2924 : const X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
99 : {
100 : X509V3_EXT_METHOD tmp;
101 2924 : const X509V3_EXT_METHOD *t = &tmp, *const *ret;
102 : int idx;
103 2924 : if (nid < 0)
104 : return NULL;
105 2924 : tmp.ext_nid = nid;
106 : ret = OBJ_bsearch_ext(&t, standard_exts, STANDARD_EXTENSION_COUNT);
107 2924 : if (ret)
108 2924 : return *ret;
109 0 : if (!ext_list)
110 : return NULL;
111 0 : idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);
112 0 : if (idx == -1)
113 : return NULL;
114 0 : return sk_X509V3_EXT_METHOD_value(ext_list, idx);
115 : }
116 :
117 2924 : const X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)
118 : {
119 : int nid;
120 2924 : if ((nid = OBJ_obj2nid(ext->object)) == NID_undef)
121 : return NULL;
122 2924 : return X509V3_EXT_get_nid(nid);
123 : }
124 :
125 0 : int X509V3_EXT_free(int nid, void *ext_data)
126 : {
127 0 : const X509V3_EXT_METHOD *ext_method = X509V3_EXT_get_nid(nid);
128 0 : if (ext_method == NULL) {
129 0 : X509V3err(X509V3_F_X509V3_EXT_FREE,
130 : X509V3_R_CANNOT_FIND_FREE_FUNCTION);
131 0 : return 0;
132 : }
133 :
134 0 : if (ext_method->it != NULL)
135 0 : ASN1_item_free(ext_data, ASN1_ITEM_ptr(ext_method->it));
136 0 : else if (ext_method->ext_free != NULL)
137 0 : ext_method->ext_free(ext_data);
138 : else {
139 0 : X509V3err(X509V3_F_X509V3_EXT_FREE,
140 : X509V3_R_CANNOT_FIND_FREE_FUNCTION);
141 0 : return 0;
142 : }
143 :
144 : return 1;
145 : }
146 :
147 0 : int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
148 : {
149 0 : for (; extlist->ext_nid != -1; extlist++)
150 0 : if (!X509V3_EXT_add(extlist))
151 : return 0;
152 : return 1;
153 : }
154 :
155 0 : int X509V3_EXT_add_alias(int nid_to, int nid_from)
156 : {
157 : const X509V3_EXT_METHOD *ext;
158 : X509V3_EXT_METHOD *tmpext;
159 :
160 0 : if (!(ext = X509V3_EXT_get_nid(nid_from))) {
161 0 : X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,
162 : X509V3_R_EXTENSION_NOT_FOUND);
163 0 : return 0;
164 : }
165 0 : if (!
166 : (tmpext =
167 : (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {
168 0 : X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS, ERR_R_MALLOC_FAILURE);
169 0 : return 0;
170 : }
171 0 : *tmpext = *ext;
172 0 : tmpext->ext_nid = nid_to;
173 0 : tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
174 0 : return X509V3_EXT_add(tmpext);
175 : }
176 :
177 0 : void X509V3_EXT_cleanup(void)
178 : {
179 0 : sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
180 0 : ext_list = NULL;
181 0 : }
182 :
183 0 : static void ext_list_free(X509V3_EXT_METHOD *ext)
184 : {
185 0 : if (ext->ext_flags & X509V3_EXT_DYNAMIC)
186 0 : OPENSSL_free(ext);
187 0 : }
188 :
189 : /*
190 : * Legacy function: we don't need to add standard extensions any more because
191 : * they are now kept in ext_dat.h.
192 : */
193 :
194 0 : int X509V3_add_standard_extensions(void)
195 : {
196 0 : return 1;
197 : }
198 :
199 : /* Return an extension internal structure */
200 :
201 2924 : void *X509V3_EXT_d2i(X509_EXTENSION *ext)
202 : {
203 : const X509V3_EXT_METHOD *method;
204 : const unsigned char *p;
205 :
206 2924 : if (!(method = X509V3_EXT_get(ext)))
207 : return NULL;
208 2924 : p = ext->value->data;
209 2924 : if (method->it)
210 2924 : return ASN1_item_d2i(NULL, &p, ext->value->length,
211 : ASN1_ITEM_ptr(method->it));
212 0 : return method->d2i(NULL, &p, ext->value->length);
213 : }
214 :
215 : /*-
216 : * Get critical flag and decoded version of extension from a NID.
217 : * The "idx" variable returns the last found extension and can
218 : * be used to retrieve multiple extensions of the same NID.
219 : * However multiple extensions with the same NID is usually
220 : * due to a badly encoded certificate so if idx is NULL we
221 : * choke if multiple extensions exist.
222 : * The "crit" variable is set to the critical value.
223 : * The return value is the decoded extension or NULL on
224 : * error. The actual error can have several different causes,
225 : * the value of *crit reflects the cause:
226 : * >= 0, extension found but not decoded (reflects critical value).
227 : * -1 extension not found.
228 : * -2 extension occurs more than once.
229 : */
230 :
231 11173 : void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit,
232 : int *idx)
233 : {
234 : int lastpos, i;
235 : X509_EXTENSION *ex, *found_ex = NULL;
236 11173 : if (!x) {
237 3300 : if (idx)
238 0 : *idx = -1;
239 3300 : if (crit)
240 330 : *crit = -1;
241 : return NULL;
242 : }
243 7873 : if (idx)
244 0 : lastpos = *idx + 1;
245 : else
246 : lastpos = 0;
247 7873 : if (lastpos < 0)
248 : lastpos = 0;
249 31492 : for (i = lastpos; i < sk_X509_EXTENSION_num(x); i++) {
250 23619 : ex = sk_X509_EXTENSION_value(x, i);
251 23619 : if (OBJ_obj2nid(ex->object) == nid) {
252 2924 : if (idx) {
253 0 : *idx = i;
254 : found_ex = ex;
255 0 : break;
256 2924 : } else if (found_ex) {
257 : /* Found more than one */
258 0 : if (crit)
259 0 : *crit = -2;
260 : return NULL;
261 : }
262 : found_ex = ex;
263 : }
264 : }
265 7873 : if (found_ex) {
266 : /* Found it */
267 2924 : if (crit)
268 0 : *crit = X509_EXTENSION_get_critical(found_ex);
269 2924 : return X509V3_EXT_d2i(found_ex);
270 : }
271 :
272 : /* Extension not found */
273 4949 : if (idx)
274 0 : *idx = -1;
275 4949 : if (crit)
276 707 : *crit = -1;
277 : return NULL;
278 : }
279 :
280 : /*
281 : * This function is a general extension append, replace and delete utility.
282 : * The precise operation is governed by the 'flags' value. The 'crit' and
283 : * 'value' arguments (if relevant) are the extensions internal structure.
284 : */
285 :
286 0 : int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,
287 : int crit, unsigned long flags)
288 : {
289 : int extidx = -1;
290 : int errcode;
291 : X509_EXTENSION *ext, *extmp;
292 0 : unsigned long ext_op = flags & X509V3_ADD_OP_MASK;
293 :
294 : /*
295 : * If appending we don't care if it exists, otherwise look for existing
296 : * extension.
297 : */
298 0 : if (ext_op != X509V3_ADD_APPEND)
299 0 : extidx = X509v3_get_ext_by_NID(*x, nid, -1);
300 :
301 : /* See if extension exists */
302 0 : if (extidx >= 0) {
303 : /* If keep existing, nothing to do */
304 0 : if (ext_op == X509V3_ADD_KEEP_EXISTING)
305 : return 1;
306 : /* If default then its an error */
307 0 : if (ext_op == X509V3_ADD_DEFAULT) {
308 : errcode = X509V3_R_EXTENSION_EXISTS;
309 : goto err;
310 : }
311 : /* If delete, just delete it */
312 0 : if (ext_op == X509V3_ADD_DELETE) {
313 0 : if (!sk_X509_EXTENSION_delete(*x, extidx))
314 : return -1;
315 0 : return 1;
316 : }
317 : } else {
318 : /*
319 : * If replace existing or delete, error since extension must exist
320 : */
321 0 : if ((ext_op == X509V3_ADD_REPLACE_EXISTING) ||
322 0 : (ext_op == X509V3_ADD_DELETE)) {
323 : errcode = X509V3_R_EXTENSION_NOT_FOUND;
324 : goto err;
325 : }
326 : }
327 :
328 : /*
329 : * If we get this far then we have to create an extension: could have
330 : * some flags for alternative encoding schemes...
331 : */
332 :
333 0 : ext = X509V3_EXT_i2d(nid, crit, value);
334 :
335 0 : if (!ext) {
336 0 : X509V3err(X509V3_F_X509V3_ADD1_I2D,
337 : X509V3_R_ERROR_CREATING_EXTENSION);
338 0 : return 0;
339 : }
340 :
341 : /* If extension exists replace it.. */
342 0 : if (extidx >= 0) {
343 0 : extmp = sk_X509_EXTENSION_value(*x, extidx);
344 0 : X509_EXTENSION_free(extmp);
345 0 : if (!sk_X509_EXTENSION_set(*x, extidx, ext))
346 : return -1;
347 0 : return 1;
348 : }
349 :
350 0 : if (!*x && !(*x = sk_X509_EXTENSION_new_null()))
351 : return -1;
352 0 : if (!sk_X509_EXTENSION_push(*x, ext))
353 : return -1;
354 :
355 0 : return 1;
356 :
357 : err:
358 0 : if (!(flags & X509V3_ADD_SILENT))
359 0 : X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);
360 : return 0;
361 : }
362 :
363 : IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)
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