3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 1999-2002 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 /* extension creation utilities */
64 #include <openssl/conf.h>
65 #include <openssl/x509.h>
66 #include <openssl/x509v3.h>
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,
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,
81 /* CONF *conf: Config file */
82 /* char *name: Name */
83 /* char *value: Value */
84 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
90 crit = v3_check_critical(&value);
91 if ((ext_type = v3_check_generic(&value)))
92 return v3_generic_extension(name, value, crit, ext_type, ctx);
93 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
95 X509V3err(X509V3_F_X509V3_EXT_NCONF, X509V3_R_ERROR_IN_EXTENSION);
96 ERR_add_error_data(4, "name=", name, ", value=", value);
101 /* CONF *conf: Config file */
102 /* char *value: Value */
103 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
108 crit = v3_check_critical(&value);
109 if ((ext_type = v3_check_generic(&value)))
110 return v3_generic_extension(OBJ_nid2sn(ext_nid),
111 value, crit, ext_type, ctx);
112 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
115 /* CONF *conf: Config file */
116 /* char *value: Value */
117 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
118 int crit, char *value)
120 const X509V3_EXT_METHOD *method;
122 STACK_OF(CONF_VALUE) *nval;
124 if (ext_nid == NID_undef) {
125 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
128 if (!(method = X509V3_EXT_get_nid(ext_nid))) {
129 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
132 /* Now get internal extension representation based on type */
135 nval = NCONF_get_section(conf, value + 1);
137 nval = X509V3_parse_list(value);
138 if (sk_CONF_VALUE_num(nval) <= 0) {
139 X509V3err(X509V3_F_DO_EXT_NCONF,
140 X509V3_R_INVALID_EXTENSION_STRING);
141 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
145 ext_struc = method->v2i(method, ctx, nval);
147 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
150 } else if (method->s2i) {
151 if (!(ext_struc = method->s2i(method, ctx, value)))
153 } else if (method->r2i) {
154 if (!ctx->db || !ctx->db_meth) {
155 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
158 if (!(ext_struc = method->r2i(method, ctx, value)))
161 X509V3err(X509V3_F_DO_EXT_NCONF,
162 X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
163 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
167 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
169 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
171 method->ext_free(ext_struc);
176 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
177 int ext_nid, int crit, void *ext_struc)
179 unsigned char *ext_der = NULL;
181 ASN1_OCTET_STRING *ext_oct = NULL;
183 /* Convert internal representation to DER */
187 ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
192 ext_len = method->i2d(ext_struc, NULL);
193 if (!(ext_der = OPENSSL_malloc(ext_len)))
196 method->i2d(ext_struc, &p);
198 if (!(ext_oct = ASN1_OCTET_STRING_new()))
200 ext_oct->data = ext_der;
202 ext_oct->length = ext_len;
204 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
207 ASN1_OCTET_STRING_free(ext_oct);
212 X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
214 OPENSSL_free(ext_der);
216 ASN1_OCTET_STRING_free(ext_oct);
221 /* Given an internal structure, nid and critical flag create an extension */
223 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
225 const X509V3_EXT_METHOD *method;
226 if (!(method = X509V3_EXT_get_nid(ext_nid))) {
227 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
230 return do_ext_i2d(method, ext_nid, crit, ext_struc);
233 /* Check the extension string for critical flag */
234 static int v3_check_critical(char **value)
237 if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
240 while (isspace((unsigned char)*p))
246 /* Check extension string for generic extension and return the type */
247 static int v3_check_generic(char **value)
251 if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) {
254 } else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) {
260 while (isspace((unsigned char)*p))
266 /* Create a generic extension: for now just handle DER type */
267 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
268 int crit, int gen_type,
271 unsigned char *ext_der = NULL;
273 ASN1_OBJECT *obj = NULL;
274 ASN1_OCTET_STRING *oct = NULL;
275 X509_EXTENSION *extension = NULL;
276 if (!(obj = OBJ_txt2obj(ext, 0))) {
277 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
278 X509V3_R_EXTENSION_NAME_ERROR);
279 ERR_add_error_data(2, "name=", ext);
284 ext_der = string_to_hex(value, &ext_len);
285 else if (gen_type == 2)
286 ext_der = generic_asn1(value, ctx, &ext_len);
288 if (ext_der == NULL) {
289 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
290 X509V3_R_EXTENSION_VALUE_ERROR);
291 ERR_add_error_data(2, "value=", value);
295 if (!(oct = ASN1_OCTET_STRING_new())) {
296 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
301 oct->length = ext_len;
304 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
307 ASN1_OBJECT_free(obj);
308 ASN1_OCTET_STRING_free(oct);
310 OPENSSL_free(ext_der);
315 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
319 unsigned char *ext_der = NULL;
320 typ = ASN1_generate_v3(value, ctx);
323 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
328 static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
332 obj = X509_EXTENSION_get_object(dext);
333 while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
334 X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
335 X509v3_delete_ext(sk, idx);
336 X509_EXTENSION_free(tmpext);
341 * This is the main function: add a bunch of extensions based on a config
342 * file section to an extension STACK.
345 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
346 STACK_OF(X509_EXTENSION) **sk)
349 STACK_OF(CONF_VALUE) *nval;
352 if (!(nval = NCONF_get_section(conf, section)))
354 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
355 val = sk_CONF_VALUE_value(nval, i);
356 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
358 if (ctx->flags == X509V3_CTX_REPLACE)
359 delete_ext(*sk, ext);
361 X509v3_add_ext(sk, ext, -1);
362 X509_EXTENSION_free(ext);
368 * Convenience functions to add extensions to a certificate, CRL and request
371 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
374 STACK_OF(X509_EXTENSION) **sk = NULL;
376 sk = &cert->cert_info->extensions;
377 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
380 /* Same as above but for a CRL */
382 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
385 STACK_OF(X509_EXTENSION) **sk = NULL;
387 sk = &crl->crl->extensions;
388 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
391 /* Add extensions to certificate request */
393 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
396 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
400 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
403 i = X509_REQ_add_extensions(req, extlist);
404 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
408 /* Config database functions */
410 char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
412 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
413 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
416 if (ctx->db_meth->get_string)
417 return ctx->db_meth->get_string(ctx->db, name, section);
421 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section)
423 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
424 X509V3err(X509V3_F_X509V3_GET_SECTION,
425 X509V3_R_OPERATION_NOT_DEFINED);
428 if (ctx->db_meth->get_section)
429 return ctx->db_meth->get_section(ctx->db, section);
433 void X509V3_string_free(X509V3_CTX *ctx, char *str)
437 if (ctx->db_meth->free_string)
438 ctx->db_meth->free_string(ctx->db, str);
441 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
445 if (ctx->db_meth->free_section)
446 ctx->db_meth->free_section(ctx->db, section);
449 static char *nconf_get_string(void *db, char *section, char *value)
451 return NCONF_get_string(db, section, value);
454 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
456 return NCONF_get_section(db, section);
459 static X509V3_CONF_METHOD nconf_method = {
466 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
468 ctx->db_meth = &nconf_method;
472 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
473 X509_CRL *crl, int flags)
475 ctx->issuer_cert = issuer;
476 ctx->subject_cert = subj;
478 ctx->subject_req = req;
482 /* Old conf compatibility functions */
484 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
485 char *name, char *value)
488 CONF_set_nconf(&ctmp, conf);
489 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
492 /* LHASH *conf: Config file */
493 /* char *value: Value */
494 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
495 X509V3_CTX *ctx, int ext_nid, char *value)
498 CONF_set_nconf(&ctmp, conf);
499 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
502 static char *conf_lhash_get_string(void *db, char *section, char *value)
504 return CONF_get_string(db, section, value);
507 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
509 return CONF_get_section(db, section);
512 static X509V3_CONF_METHOD conf_lhash_method = {
513 conf_lhash_get_string,
514 conf_lhash_get_section,
519 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
521 ctx->db_meth = &conf_lhash_method;
525 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
526 char *section, X509 *cert)
529 CONF_set_nconf(&ctmp, conf);
530 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
533 /* Same as above but for a CRL */
535 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
536 char *section, X509_CRL *crl)
539 CONF_set_nconf(&ctmp, conf);
540 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
543 /* Add extensions to certificate request */
545 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
546 char *section, X509_REQ *req)
549 CONF_set_nconf(&ctmp, conf);
550 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);