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 */
63 #include "internal/cryptlib.h"
64 #include <openssl/conf.h>
65 #include <openssl/x509.h>
66 #include "internal/x509_int.h"
67 #include <openssl/x509v3.h>
69 static int v3_check_critical(char **value);
70 static int v3_check_generic(char **value);
71 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
72 int crit, char *value);
73 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
76 static char *conf_lhash_get_string(void *db, char *section, char *value);
77 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section);
78 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
79 int ext_nid, int crit, void *ext_struc);
80 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
82 /* CONF *conf: Config file */
83 /* char *name: Name */
84 /* char *value: Value */
85 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
91 crit = v3_check_critical(&value);
92 if ((ext_type = v3_check_generic(&value)))
93 return v3_generic_extension(name, value, crit, ext_type, ctx);
94 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
96 X509V3err(X509V3_F_X509V3_EXT_NCONF, X509V3_R_ERROR_IN_EXTENSION);
97 ERR_add_error_data(4, "name=", name, ", value=", value);
102 /* CONF *conf: Config file */
103 /* char *value: Value */
104 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
109 crit = v3_check_critical(&value);
110 if ((ext_type = v3_check_generic(&value)))
111 return v3_generic_extension(OBJ_nid2sn(ext_nid),
112 value, crit, ext_type, ctx);
113 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
116 /* CONF *conf: Config file */
117 /* char *value: Value */
118 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
119 int crit, char *value)
121 const X509V3_EXT_METHOD *method;
123 STACK_OF(CONF_VALUE) *nval;
126 if (ext_nid == NID_undef) {
127 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME);
130 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
131 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);
134 /* Now get internal extension representation based on type */
137 nval = NCONF_get_section(conf, value + 1);
139 nval = X509V3_parse_list(value);
140 if (sk_CONF_VALUE_num(nval) <= 0) {
141 X509V3err(X509V3_F_DO_EXT_NCONF,
142 X509V3_R_INVALID_EXTENSION_STRING);
143 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
147 ext_struc = method->v2i(method, ctx, nval);
149 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
152 } else if (method->s2i) {
153 if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
155 } else if (method->r2i) {
156 if (!ctx->db || !ctx->db_meth) {
157 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE);
160 if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
163 X509V3err(X509V3_F_DO_EXT_NCONF,
164 X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
165 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
169 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
171 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
173 method->ext_free(ext_struc);
178 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
179 int ext_nid, int crit, void *ext_struc)
181 unsigned char *ext_der = NULL;
183 ASN1_OCTET_STRING *ext_oct = NULL;
185 /* Convert internal representation to DER */
189 ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
195 ext_len = method->i2d(ext_struc, NULL);
196 if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
199 method->i2d(ext_struc, &p);
201 if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL)
203 ext_oct->data = ext_der;
205 ext_oct->length = ext_len;
207 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
210 ASN1_OCTET_STRING_free(ext_oct);
215 X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE);
216 OPENSSL_free(ext_der);
217 ASN1_OCTET_STRING_free(ext_oct);
222 /* Given an internal structure, nid and critical flag create an extension */
224 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
226 const X509V3_EXT_METHOD *method;
228 if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
229 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION);
232 return do_ext_i2d(method, ext_nid, crit, ext_struc);
235 /* Check the extension string for critical flag */
236 static int v3_check_critical(char **value)
239 if ((strlen(p) < 9) || strncmp(p, "critical,", 9))
242 while (isspace((unsigned char)*p))
248 /* Check extension string for generic extension and return the type */
249 static int v3_check_generic(char **value)
253 if ((strlen(p) >= 4) && strncmp(p, "DER:", 4) == 0) {
256 } else if ((strlen(p) >= 5) && strncmp(p, "ASN1:", 5) == 0) {
262 while (isspace((unsigned char)*p))
268 /* Create a generic extension: for now just handle DER type */
269 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
270 int crit, int gen_type,
273 unsigned char *ext_der = NULL;
275 ASN1_OBJECT *obj = NULL;
276 ASN1_OCTET_STRING *oct = NULL;
277 X509_EXTENSION *extension = NULL;
279 if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
280 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
281 X509V3_R_EXTENSION_NAME_ERROR);
282 ERR_add_error_data(2, "name=", ext);
287 ext_der = string_to_hex(value, &ext_len);
288 else if (gen_type == 2)
289 ext_der = generic_asn1(value, ctx, &ext_len);
291 if (ext_der == NULL) {
292 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,
293 X509V3_R_EXTENSION_VALUE_ERROR);
294 ERR_add_error_data(2, "value=", value);
298 if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
299 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE);
304 oct->length = ext_len;
307 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
310 ASN1_OBJECT_free(obj);
311 ASN1_OCTET_STRING_free(oct);
312 OPENSSL_free(ext_der);
317 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
321 unsigned char *ext_der = NULL;
322 typ = ASN1_generate_v3(value, ctx);
325 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
330 static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
334 obj = X509_EXTENSION_get_object(dext);
335 while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0) {
336 X509_EXTENSION *tmpext = X509v3_get_ext(sk, idx);
337 X509v3_delete_ext(sk, idx);
338 X509_EXTENSION_free(tmpext);
343 * This is the main function: add a bunch of extensions based on a config
344 * file section to an extension STACK.
347 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
348 STACK_OF(X509_EXTENSION) **sk)
351 STACK_OF(CONF_VALUE) *nval;
355 if ((nval = NCONF_get_section(conf, section)) == NULL)
357 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
358 val = sk_CONF_VALUE_value(nval, i);
359 if ((ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)) == NULL)
361 if (ctx->flags == X509V3_CTX_REPLACE)
362 delete_ext(*sk, ext);
364 X509v3_add_ext(sk, ext, -1);
365 X509_EXTENSION_free(ext);
371 * Convenience functions to add extensions to a certificate, CRL and request
374 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
377 STACK_OF(X509_EXTENSION) **sk = NULL;
379 sk = &cert->cert_info.extensions;
380 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
383 /* Same as above but for a CRL */
385 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
388 STACK_OF(X509_EXTENSION) **sk = NULL;
390 sk = &crl->crl.extensions;
391 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
394 /* Add extensions to certificate request */
396 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
399 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
403 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
406 i = X509_REQ_add_extensions(req, extlist);
407 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
411 /* Config database functions */
413 char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
415 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
416 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED);
419 if (ctx->db_meth->get_string)
420 return ctx->db_meth->get_string(ctx->db, name, section);
424 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section)
426 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
427 X509V3err(X509V3_F_X509V3_GET_SECTION,
428 X509V3_R_OPERATION_NOT_DEFINED);
431 if (ctx->db_meth->get_section)
432 return ctx->db_meth->get_section(ctx->db, section);
436 void X509V3_string_free(X509V3_CTX *ctx, char *str)
440 if (ctx->db_meth->free_string)
441 ctx->db_meth->free_string(ctx->db, str);
444 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
448 if (ctx->db_meth->free_section)
449 ctx->db_meth->free_section(ctx->db, section);
452 static char *nconf_get_string(void *db, char *section, char *value)
454 return NCONF_get_string(db, section, value);
457 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
459 return NCONF_get_section(db, section);
462 static X509V3_CONF_METHOD nconf_method = {
469 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
471 ctx->db_meth = &nconf_method;
475 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
476 X509_CRL *crl, int flags)
478 ctx->issuer_cert = issuer;
479 ctx->subject_cert = subj;
481 ctx->subject_req = req;
485 /* Old conf compatibility functions */
487 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
488 char *name, char *value)
491 CONF_set_nconf(&ctmp, conf);
492 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
495 /* LHASH *conf: Config file */
496 /* char *value: Value */
497 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
498 X509V3_CTX *ctx, int ext_nid, char *value)
501 CONF_set_nconf(&ctmp, conf);
502 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
505 static char *conf_lhash_get_string(void *db, char *section, char *value)
507 return CONF_get_string(db, section, value);
510 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
512 return CONF_get_section(db, section);
515 static X509V3_CONF_METHOD conf_lhash_method = {
516 conf_lhash_get_string,
517 conf_lhash_get_section,
522 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
524 ctx->db_meth = &conf_lhash_method;
528 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
529 char *section, X509 *cert)
532 CONF_set_nconf(&ctmp, conf);
533 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
536 /* Same as above but for a CRL */
538 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
539 char *section, X509_CRL *crl)
542 CONF_set_nconf(&ctmp, conf);
543 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
546 /* Add extensions to certificate request */
548 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
549 char *section, X509_REQ *req)
552 CONF_set_nconf(&ctmp, conf);
553 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);