Line data Source code
1 : /* v3_conf.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 1999.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 1999-2002 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 : /* extension creation utilities */
60 :
61 : #include <stdio.h>
62 : #include <ctype.h>
63 : #include "cryptlib.h"
64 : #include <openssl/conf.h>
65 : #include <openssl/x509.h>
66 : #include <openssl/x509v3.h>
67 :
68 : static int v3_check_critical(char **value);
69 : static int v3_check_generic(char **value);
70 : static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
71 : int crit, char *value);
72 : static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
73 : int crit, int type,
74 : X509V3_CTX *ctx);
75 : static char *conf_lhash_get_string(void *db, char *section, char *value);
76 : static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section);
77 : static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
78 : int ext_nid, int crit, void *ext_struc);
79 : static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
80 : long *ext_len);
81 : /* CONF *conf: Config file */
82 : /* char *name: Name */
83 : /* char *value: Value */
84 0 : X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
85 : char *value)
86 : {
87 : int crit;
88 : int ext_type;
89 : X509_EXTENSION *ret;
90 0 : crit = v3_check_critical(&value);
91 0 : if ((ext_type = v3_check_generic(&value)))
92 0 : return v3_generic_extension(name, value, crit, ext_type, ctx);
93 0 : ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
94 0 : if (!ret) {
95 0 : X509V3err(X509V3_F_X509V3_EXT_NCONF, X509V3_R_ERROR_IN_EXTENSION);
96 0 : ERR_add_error_data(4, "name=", name, ", value=", value);
97 : }
98 0 : return ret;
99 : }
100 :
101 : /* CONF *conf: Config file */
102 : /* char *value: Value */
103 0 : X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
104 : char *value)
105 : {
106 : int crit;
107 : int ext_type;
108 0 : crit = v3_check_critical(&value);
109 0 : if ((ext_type = v3_check_generic(&value)))
110 0 : return v3_generic_extension(OBJ_nid2sn(ext_nid),
111 : value, crit, ext_type, ctx);
112 0 : return do_ext_nconf(conf, ctx, ext_nid, crit, value);
113 : }
114 :
115 : /* CONF *conf: Config file */
116 : /* char *value: Value */
117 0 : static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
118 : int crit, char *value)
119 : {
120 0 : const X509V3_EXT_METHOD *method;
121 : X509_EXTENSION *ext;
122 : STACK_OF(CONF_VALUE) *nval;
123 : void *ext_struc;
124 0 : if (ext_nid == NID_undef) {
125 0 : X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
126 0 : return NULL;
127 : }
128 0 : if (!(method = X509V3_EXT_get_nid(ext_nid))) {
129 0 : X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
130 0 : return NULL;
131 : }
132 : /* Now get internal extension representation based on type */
133 0 : if (method->v2i) {
134 0 : if (*value == '@')
135 0 : nval = NCONF_get_section(conf, value + 1);
136 : else
137 0 : nval = X509V3_parse_list(value);
138 0 : if (sk_CONF_VALUE_num(nval) <= 0) {
139 0 : X509V3err(X509V3_F_DO_EXT_NCONF,
140 : X509V3_R_INVALID_EXTENSION_STRING);
141 0 : ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
142 : value);
143 0 : return NULL;
144 : }
145 0 : ext_struc = method->v2i(method, ctx, nval);
146 0 : if (*value != '@')
147 0 : sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
148 0 : if (!ext_struc)
149 : return NULL;
150 0 : } else if (method->s2i) {
151 0 : if (!(ext_struc = method->s2i(method, ctx, value)))
152 : return NULL;
153 0 : } else if (method->r2i) {
154 0 : if (!ctx->db || !ctx->db_meth) {
155 0 : X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
156 0 : return NULL;
157 : }
158 0 : if (!(ext_struc = method->r2i(method, ctx, value)))
159 : return NULL;
160 : } else {
161 0 : X509V3err(X509V3_F_DO_EXT_NCONF,
162 : X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
163 0 : ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
164 0 : return NULL;
165 : }
166 :
167 0 : ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
168 0 : if (method->it)
169 0 : ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
170 : else
171 0 : method->ext_free(ext_struc);
172 0 : return ext;
173 :
174 : }
175 :
176 0 : static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
177 : int ext_nid, int crit, void *ext_struc)
178 : {
179 : unsigned char *ext_der;
180 : int ext_len;
181 : ASN1_OCTET_STRING *ext_oct;
182 : X509_EXTENSION *ext;
183 : /* Convert internal representation to DER */
184 0 : if (method->it) {
185 0 : ext_der = NULL;
186 0 : ext_len =
187 : ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
188 0 : if (ext_len < 0)
189 : goto merr;
190 : } else {
191 : unsigned char *p;
192 0 : ext_len = method->i2d(ext_struc, NULL);
193 0 : if (!(ext_der = OPENSSL_malloc(ext_len)))
194 : goto merr;
195 0 : p = ext_der;
196 0 : method->i2d(ext_struc, &p);
197 : }
198 0 : if (!(ext_oct = M_ASN1_OCTET_STRING_new()))
199 : goto merr;
200 0 : ext_oct->data = ext_der;
201 0 : ext_oct->length = ext_len;
202 :
203 0 : ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
204 0 : if (!ext)
205 : goto merr;
206 0 : M_ASN1_OCTET_STRING_free(ext_oct);
207 :
208 : return ext;
209 :
210 : merr:
211 0 : X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
212 : return NULL;
213 :
214 : }
215 :
216 : /* Given an internal structure, nid and critical flag create an extension */
217 :
218 0 : X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
219 : {
220 0 : const X509V3_EXT_METHOD *method;
221 0 : if (!(method = X509V3_EXT_get_nid(ext_nid))) {
222 0 : X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
223 0 : return NULL;
224 : }
225 0 : return do_ext_i2d(method, ext_nid, crit, ext_struc);
226 : }
227 :
228 : /* Check the extension string for critical flag */
229 0 : static int v3_check_critical(char **value)
230 : {
231 0 : char *p = *value;
232 0 : if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
233 : return 0;
234 0 : p += 9;
235 0 : while (isspace((unsigned char)*p))
236 0 : p++;
237 0 : *value = p;
238 0 : return 1;
239 : }
240 :
241 : /* Check extension string for generic extension and return the type */
242 0 : static int v3_check_generic(char **value)
243 : {
244 : int gen_type = 0;
245 0 : char *p = *value;
246 0 : if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) {
247 0 : p += 4;
248 0 : gen_type = 1;
249 0 : } else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) {
250 0 : p += 5;
251 0 : gen_type = 2;
252 : } else
253 : return 0;
254 :
255 0 : while (isspace((unsigned char)*p))
256 0 : p++;
257 0 : *value = p;
258 0 : return gen_type;
259 : }
260 :
261 : /* Create a generic extension: for now just handle DER type */
262 0 : static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
263 : int crit, int gen_type,
264 : X509V3_CTX *ctx)
265 : {
266 : unsigned char *ext_der = NULL;
267 : long ext_len;
268 : ASN1_OBJECT *obj = NULL;
269 : ASN1_OCTET_STRING *oct = NULL;
270 : X509_EXTENSION *extension = NULL;
271 0 : if (!(obj = OBJ_txt2obj(ext, 0))) {
272 0 : X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
273 : X509V3_R_EXTENSION_NAME_ERROR);
274 0 : ERR_add_error_data(2, "name=", ext);
275 0 : goto err;
276 : }
277 :
278 0 : if (gen_type == 1)
279 0 : ext_der = string_to_hex(value, &ext_len);
280 0 : else if (gen_type == 2)
281 0 : ext_der = generic_asn1(value, ctx, &ext_len);
282 :
283 0 : if (ext_der == NULL) {
284 0 : X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
285 : X509V3_R_EXTENSION_VALUE_ERROR);
286 0 : ERR_add_error_data(2, "value=", value);
287 0 : goto err;
288 : }
289 :
290 0 : if (!(oct = M_ASN1_OCTET_STRING_new())) {
291 0 : X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
292 0 : goto err;
293 : }
294 :
295 0 : oct->data = ext_der;
296 0 : oct->length = ext_len;
297 : ext_der = NULL;
298 :
299 0 : extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
300 :
301 : err:
302 0 : ASN1_OBJECT_free(obj);
303 0 : M_ASN1_OCTET_STRING_free(oct);
304 0 : if (ext_der)
305 0 : OPENSSL_free(ext_der);
306 0 : return extension;
307 :
308 : }
309 :
310 0 : static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
311 : long *ext_len)
312 : {
313 : ASN1_TYPE *typ;
314 0 : unsigned char *ext_der = NULL;
315 0 : typ = ASN1_generate_v3(value, ctx);
316 0 : if (typ == NULL)
317 : return NULL;
318 0 : *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
319 0 : ASN1_TYPE_free(typ);
320 0 : return ext_der;
321 : }
322 :
323 : /*
324 : * This is the main function: add a bunch of extensions based on a config
325 : * file section to an extension STACK.
326 : */
327 :
328 0 : int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
329 : STACK_OF(X509_EXTENSION) **sk)
330 : {
331 : X509_EXTENSION *ext;
332 : STACK_OF(CONF_VALUE) *nval;
333 : CONF_VALUE *val;
334 : int i;
335 0 : if (!(nval = NCONF_get_section(conf, section)))
336 : return 0;
337 0 : for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
338 0 : val = sk_CONF_VALUE_value(nval, i);
339 0 : if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
340 : return 0;
341 0 : if (sk)
342 0 : X509v3_add_ext(sk, ext, -1);
343 0 : X509_EXTENSION_free(ext);
344 : }
345 : return 1;
346 : }
347 :
348 : /*
349 : * Convenience functions to add extensions to a certificate, CRL and request
350 : */
351 :
352 0 : int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
353 : X509 *cert)
354 : {
355 : STACK_OF(X509_EXTENSION) **sk = NULL;
356 0 : if (cert)
357 0 : sk = &cert->cert_info->extensions;
358 0 : return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
359 : }
360 :
361 : /* Same as above but for a CRL */
362 :
363 0 : int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
364 : X509_CRL *crl)
365 : {
366 : STACK_OF(X509_EXTENSION) **sk = NULL;
367 0 : if (crl)
368 0 : sk = &crl->crl->extensions;
369 0 : return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
370 : }
371 :
372 : /* Add extensions to certificate request */
373 :
374 0 : int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
375 : X509_REQ *req)
376 : {
377 0 : STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
378 : int i;
379 0 : if (req)
380 : sk = &extlist;
381 0 : i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
382 0 : if (!i || !sk)
383 : return i;
384 0 : i = X509_REQ_add_extensions(req, extlist);
385 0 : sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
386 0 : return i;
387 : }
388 :
389 : /* Config database functions */
390 :
391 0 : char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
392 : {
393 0 : if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
394 0 : X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
395 0 : return NULL;
396 : }
397 0 : if (ctx->db_meth->get_string)
398 0 : return ctx->db_meth->get_string(ctx->db, name, section);
399 : return NULL;
400 : }
401 :
402 0 : STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section)
403 : {
404 0 : if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
405 0 : X509V3err(X509V3_F_X509V3_GET_SECTION,
406 : X509V3_R_OPERATION_NOT_DEFINED);
407 0 : return NULL;
408 : }
409 0 : if (ctx->db_meth->get_section)
410 0 : return ctx->db_meth->get_section(ctx->db, section);
411 : return NULL;
412 : }
413 :
414 0 : void X509V3_string_free(X509V3_CTX *ctx, char *str)
415 : {
416 0 : if (!str)
417 0 : return;
418 0 : if (ctx->db_meth->free_string)
419 0 : ctx->db_meth->free_string(ctx->db, str);
420 : }
421 :
422 0 : void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
423 : {
424 0 : if (!section)
425 0 : return;
426 0 : if (ctx->db_meth->free_section)
427 0 : ctx->db_meth->free_section(ctx->db, section);
428 : }
429 :
430 0 : static char *nconf_get_string(void *db, char *section, char *value)
431 : {
432 0 : return NCONF_get_string(db, section, value);
433 : }
434 :
435 0 : static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
436 : {
437 0 : return NCONF_get_section(db, section);
438 : }
439 :
440 : static X509V3_CONF_METHOD nconf_method = {
441 : nconf_get_string,
442 : nconf_get_section,
443 : NULL,
444 : NULL
445 : };
446 :
447 0 : void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
448 : {
449 0 : ctx->db_meth = &nconf_method;
450 0 : ctx->db = conf;
451 0 : }
452 :
453 0 : void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
454 : X509_CRL *crl, int flags)
455 : {
456 0 : ctx->issuer_cert = issuer;
457 0 : ctx->subject_cert = subj;
458 0 : ctx->crl = crl;
459 0 : ctx->subject_req = req;
460 0 : ctx->flags = flags;
461 0 : }
462 :
463 : /* Old conf compatibility functions */
464 :
465 0 : X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
466 : char *name, char *value)
467 : {
468 : CONF ctmp;
469 0 : CONF_set_nconf(&ctmp, conf);
470 0 : return X509V3_EXT_nconf(&ctmp, ctx, name, value);
471 : }
472 :
473 : /* LHASH *conf: Config file */
474 : /* char *value: Value */
475 0 : X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
476 : X509V3_CTX *ctx, int ext_nid, char *value)
477 : {
478 : CONF ctmp;
479 0 : CONF_set_nconf(&ctmp, conf);
480 0 : return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
481 : }
482 :
483 0 : static char *conf_lhash_get_string(void *db, char *section, char *value)
484 : {
485 0 : return CONF_get_string(db, section, value);
486 : }
487 :
488 0 : static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
489 : {
490 0 : return CONF_get_section(db, section);
491 : }
492 :
493 : static X509V3_CONF_METHOD conf_lhash_method = {
494 : conf_lhash_get_string,
495 : conf_lhash_get_section,
496 : NULL,
497 : NULL
498 : };
499 :
500 0 : void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
501 : {
502 0 : ctx->db_meth = &conf_lhash_method;
503 0 : ctx->db = lhash;
504 0 : }
505 :
506 0 : int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
507 : char *section, X509 *cert)
508 : {
509 : CONF ctmp;
510 0 : CONF_set_nconf(&ctmp, conf);
511 0 : return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
512 : }
513 :
514 : /* Same as above but for a CRL */
515 :
516 0 : int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
517 : char *section, X509_CRL *crl)
518 : {
519 : CONF ctmp;
520 0 : CONF_set_nconf(&ctmp, conf);
521 0 : return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
522 : }
523 :
524 : /* Add extensions to certificate request */
525 :
526 0 : int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
527 : char *section, X509_REQ *req)
528 : {
529 : CONF ctmp;
530 0 : CONF_set_nconf(&ctmp, conf);
531 0 : return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);
532 : }
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