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);
213 OPENSSL_free(ext_der);
214 ASN1_OCTET_STRING_free(ext_oct);
219 /* Given an internal structure, nid and critical flag create an extension */
221 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
223 const X509V3_EXT_METHOD *method;
224 if (!(method = X509V3_EXT_get_nid(ext_nid))) {
225 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
228 return do_ext_i2d(method, ext_nid, crit, ext_struc);
231 /* Check the extension string for critical flag */
232 static int v3_check_critical(char **value)
235 if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
238 while (isspace((unsigned char)*p))
244 /* Check extension string for generic extension and return the type */
245 static int v3_check_generic(char **value)
249 if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) {
252 } else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) {
258 while (isspace((unsigned char)*p))
264 /* Create a generic extension: for now just handle DER type */
265 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
266 int crit, int gen_type,
269 unsigned char *ext_der = NULL;
271 ASN1_OBJECT *obj = NULL;
272 ASN1_OCTET_STRING *oct = NULL;
273 X509_EXTENSION *extension = NULL;
274 if (!(obj = OBJ_txt2obj(ext, 0))) {
275 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
276 X509V3_R_EXTENSION_NAME_ERROR);
277 ERR_add_error_data(2, "name=", ext);
282 ext_der = string_to_hex(value, &ext_len);
283 else if (gen_type == 2)
284 ext_der = generic_asn1(value, ctx, &ext_len);
286 if (ext_der == NULL) {
287 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
288 X509V3_R_EXTENSION_VALUE_ERROR);
289 ERR_add_error_data(2, "value=", value);
293 if (!(oct = ASN1_OCTET_STRING_new())) {
294 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
299 oct->length = ext_len;
302 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
305 ASN1_OBJECT_free(obj);
306 ASN1_OCTET_STRING_free(oct);
307 OPENSSL_free(ext_der);
312 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
316 unsigned char *ext_der = NULL;
317 typ = ASN1_generate_v3(value, ctx);
320 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
325 static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
329 obj = X509_EXTENSION_get_object(dext);
330 while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
331 X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
332 X509v3_delete_ext(sk, idx);
333 X509_EXTENSION_free(tmpext);
338 * This is the main function: add a bunch of extensions based on a config
339 * file section to an extension STACK.
342 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
343 STACK_OF(X509_EXTENSION) **sk)
346 STACK_OF(CONF_VALUE) *nval;
349 if (!(nval = NCONF_get_section(conf, section)))
351 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
352 val = sk_CONF_VALUE_value(nval, i);
353 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
355 if (ctx->flags == X509V3_CTX_REPLACE)
356 delete_ext(*sk, ext);
358 X509v3_add_ext(sk, ext, -1);
359 X509_EXTENSION_free(ext);
365 * Convenience functions to add extensions to a certificate, CRL and request
368 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
371 STACK_OF(X509_EXTENSION) **sk = NULL;
373 sk = &cert->cert_info->extensions;
374 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
377 /* Same as above but for a CRL */
379 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
382 STACK_OF(X509_EXTENSION) **sk = NULL;
384 sk = &crl->crl->extensions;
385 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
388 /* Add extensions to certificate request */
390 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
393 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
397 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
400 i = X509_REQ_add_extensions(req, extlist);
401 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
405 /* Config database functions */
407 char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
409 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
410 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
413 if (ctx->db_meth->get_string)
414 return ctx->db_meth->get_string(ctx->db, name, section);
418 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section)
420 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
421 X509V3err(X509V3_F_X509V3_GET_SECTION,
422 X509V3_R_OPERATION_NOT_DEFINED);
425 if (ctx->db_meth->get_section)
426 return ctx->db_meth->get_section(ctx->db, section);
430 void X509V3_string_free(X509V3_CTX *ctx, char *str)
434 if (ctx->db_meth->free_string)
435 ctx->db_meth->free_string(ctx->db, str);
438 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
442 if (ctx->db_meth->free_section)
443 ctx->db_meth->free_section(ctx->db, section);
446 static char *nconf_get_string(void *db, char *section, char *value)
448 return NCONF_get_string(db, section, value);
451 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
453 return NCONF_get_section(db, section);
456 static X509V3_CONF_METHOD nconf_method = {
463 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
465 ctx->db_meth = &nconf_method;
469 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
470 X509_CRL *crl, int flags)
472 ctx->issuer_cert = issuer;
473 ctx->subject_cert = subj;
475 ctx->subject_req = req;
479 /* Old conf compatibility functions */
481 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
482 char *name, char *value)
485 CONF_set_nconf(&ctmp, conf);
486 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
489 /* LHASH *conf: Config file */
490 /* char *value: Value */
491 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
492 X509V3_CTX *ctx, int ext_nid, char *value)
495 CONF_set_nconf(&ctmp, conf);
496 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
499 static char *conf_lhash_get_string(void *db, char *section, char *value)
501 return CONF_get_string(db, section, value);
504 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
506 return CONF_get_section(db, section);
509 static X509V3_CONF_METHOD conf_lhash_method = {
510 conf_lhash_get_string,
511 conf_lhash_get_section,
516 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
518 ctx->db_meth = &conf_lhash_method;
522 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
523 char *section, X509 *cert)
526 CONF_set_nconf(&ctmp, conf);
527 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
530 /* Same as above but for a CRL */
532 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
533 char *section, X509_CRL *crl)
536 CONF_set_nconf(&ctmp, conf);
537 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
540 /* Add extensions to certificate request */
542 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
543 char *section, X509_REQ *req)
546 CONF_set_nconf(&ctmp, conf);
547 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);