2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 1999-2002 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
58 /* extension creation utilities */
62 #include "internal/cryptlib.h"
63 #include <openssl/conf.h>
64 #include <openssl/x509.h>
65 #include "internal/x509_int.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;
125 if (ext_nid == NID_undef) {
126 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
129 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
130 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
133 /* Now get internal extension representation based on type */
136 nval = NCONF_get_section(conf, value + 1);
138 nval = X509V3_parse_list(value);
139 if (sk_CONF_VALUE_num(nval) <= 0) {
140 X509V3err(X509V3_F_DO_EXT_NCONF,
141 X509V3_R_INVALID_EXTENSION_STRING);
142 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
146 ext_struc = method->v2i(method, ctx, nval);
148 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
151 } else if (method->s2i) {
152 if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
154 } else if (method->r2i) {
155 if (!ctx->db || !ctx->db_meth) {
156 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
159 if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
162 X509V3err(X509V3_F_DO_EXT_NCONF,
163 X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
164 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
168 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
170 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
172 method->ext_free(ext_struc);
177 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
178 int ext_nid, int crit, void *ext_struc)
180 unsigned char *ext_der = NULL;
182 ASN1_OCTET_STRING *ext_oct = NULL;
184 /* Convert internal representation to DER */
188 ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
194 ext_len = method->i2d(ext_struc, NULL);
195 if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
198 method->i2d(ext_struc, &p);
200 if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL)
202 ext_oct->data = ext_der;
204 ext_oct->length = ext_len;
206 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
209 ASN1_OCTET_STRING_free(ext_oct);
214 X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
215 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;
227 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
228 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
231 return do_ext_i2d(method, ext_nid, crit, ext_struc);
234 /* Check the extension string for critical flag */
235 static int v3_check_critical(char **value)
238 if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
241 while (isspace((unsigned char)*p))
247 /* Check extension string for generic extension and return the type */
248 static int v3_check_generic(char **value)
252 if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
255 } else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
261 while (isspace((unsigned char)*p))
267 /* Create a generic extension: for now just handle DER type */
268 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
269 int crit, int gen_type,
272 unsigned char *ext_der = NULL;
274 ASN1_OBJECT *obj = NULL;
275 ASN1_OCTET_STRING *oct = NULL;
276 X509_EXTENSION *extension = NULL;
278 if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
279 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
280 X509V3_R_EXTENSION_NAME_ERROR);
281 ERR_add_error_data(2, "name=", ext);
286 ext_der = string_to_hex(value, &ext_len);
287 else if (gen_type == 2)
288 ext_der = generic_asn1(value, ctx, &ext_len);
290 if (ext_der == NULL) {
291 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
292 X509V3_R_EXTENSION_VALUE_ERROR);
293 ERR_add_error_data(2, "value=", value);
297 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
298 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
303 oct->length = ext_len;
306 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
309 ASN1_OBJECT_free(obj);
310 ASN1_OCTET_STRING_free(oct);
311 OPENSSL_free(ext_der);
316 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
320 unsigned char *ext_der = NULL;
321 typ = ASN1_generate_v3(value, ctx);
324 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
329 static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
333 obj = X509_EXTENSION_get_object(dext);
334 while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
335 X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
336 X509v3_delete_ext(sk, idx);
337 X509_EXTENSION_free(tmpext);
342 * This is the main function: add a bunch of extensions based on a config
343 * file section to an extension STACK.
346 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
347 STACK_OF(X509_EXTENSION) **sk)
350 STACK_OF(CONF_VALUE) *nval;
354 if ((nval = NCONF_get_section(conf, section)) == NULL)
356 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
357 val = sk_CONF_VALUE_value(nval, i);
358 if ((ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)) == NULL)
360 if (ctx->flags == X509V3_CTX_REPLACE)
361 delete_ext(*sk, ext);
363 X509v3_add_ext(sk, ext, -1);
364 X509_EXTENSION_free(ext);
370 * Convenience functions to add extensions to a certificate, CRL and request
373 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
376 STACK_OF(X509_EXTENSION) **sk = NULL;
378 sk = &cert->cert_info.extensions;
379 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
382 /* Same as above but for a CRL */
384 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
387 STACK_OF(X509_EXTENSION) **sk = NULL;
389 sk = &crl->crl.extensions;
390 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
393 /* Add extensions to certificate request */
395 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
398 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
402 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
405 i = X509_REQ_add_extensions(req, extlist);
406 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
410 /* Config database functions */
412 char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
414 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
415 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
418 if (ctx->db_meth->get_string)
419 return ctx->db_meth->get_string(ctx->db, name, section);
423 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section)
425 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
426 X509V3err(X509V3_F_X509V3_GET_SECTION,
427 X509V3_R_OPERATION_NOT_DEFINED);
430 if (ctx->db_meth->get_section)
431 return ctx->db_meth->get_section(ctx->db, section);
435 void X509V3_string_free(X509V3_CTX *ctx, char *str)
439 if (ctx->db_meth->free_string)
440 ctx->db_meth->free_string(ctx->db, str);
443 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
447 if (ctx->db_meth->free_section)
448 ctx->db_meth->free_section(ctx->db, section);
451 static char *nconf_get_string(void *db, char *section, char *value)
453 return NCONF_get_string(db, section, value);
456 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
458 return NCONF_get_section(db, section);
461 static X509V3_CONF_METHOD nconf_method = {
468 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
470 ctx->db_meth = &nconf_method;
474 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
475 X509_CRL *crl, int flags)
477 ctx->issuer_cert = issuer;
478 ctx->subject_cert = subj;
480 ctx->subject_req = req;
484 /* Old conf compatibility functions */
486 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
487 char *name, char *value)
490 CONF_set_nconf(&ctmp, conf);
491 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
494 /* LHASH *conf: Config file */
495 /* char *value: Value */
496 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
497 X509V3_CTX *ctx, int ext_nid, char *value)
500 CONF_set_nconf(&ctmp, conf);
501 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
504 static char *conf_lhash_get_string(void *db, char *section, char *value)
506 return CONF_get_string(db, section, value);
509 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
511 return CONF_get_section(db, section);
514 static X509V3_CONF_METHOD conf_lhash_method = {
515 conf_lhash_get_string,
516 conf_lhash_get_section,
521 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
523 ctx->db_meth = &conf_lhash_method;
527 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
528 char *section, X509 *cert)
531 CONF_set_nconf(&ctmp, conf);
532 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
535 /* Same as above but for a CRL */
537 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
538 char *section, X509_CRL *crl)
541 CONF_set_nconf(&ctmp, conf);
542 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
545 /* Add extensions to certificate request */
547 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
548 char *section, X509_REQ *req)
551 CONF_set_nconf(&ctmp, conf);
552 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);