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). */
58 /* extension creation utilities */
64 #include <openssl/conf.h>
65 #include <openssl/err.h>
66 #include <openssl/mem.h>
67 #include <openssl/obj.h>
68 #include <openssl/x509.h>
69 #include <openssl/x509v3.h>
71 #include "../internal.h"
73 static int v3_check_critical(char **value);
74 static int v3_check_generic(char **value);
75 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
76 int crit, char *value);
77 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
80 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
81 int ext_nid, int crit, void *ext_struc);
82 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
84 /* CONF *conf: Config file */
85 /* char *name: Name */
86 /* char *value: Value */
87 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
93 crit = v3_check_critical(&value);
94 if ((ext_type = v3_check_generic(&value)))
95 return v3_generic_extension(name, value, crit, ext_type, ctx);
96 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
98 OPENSSL_PUT_ERROR(X509V3, X509V3_R_ERROR_IN_EXTENSION);
99 ERR_add_error_data(4, "name=", name, ", value=", value);
104 /* CONF *conf: Config file */
105 /* char *value: Value */
106 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
111 crit = v3_check_critical(&value);
112 if ((ext_type = v3_check_generic(&value)))
113 return v3_generic_extension(OBJ_nid2sn(ext_nid),
114 value, crit, ext_type, ctx);
115 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
118 /* CONF *conf: Config file */
119 /* char *value: Value */
120 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
121 int crit, char *value)
123 const X509V3_EXT_METHOD *method;
125 STACK_OF(CONF_VALUE) *nval;
127 if (ext_nid == NID_undef) {
128 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_EXTENSION_NAME);
131 if (!(method = X509V3_EXT_get_nid(ext_nid))) {
132 OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNKNOWN_EXTENSION);
135 /* Now get internal extension representation based on type */
138 nval = NCONF_get_section(conf, value + 1);
140 nval = X509V3_parse_list(value);
141 if (nval == NULL || sk_CONF_VALUE_num(nval) <= 0) {
142 OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_EXTENSION_STRING);
143 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=",
146 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
149 ext_struc = method->v2i(method, ctx, nval);
151 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
154 } else if (method->s2i) {
155 if (!(ext_struc = method->s2i(method, ctx, value)))
157 } else if (method->r2i) {
158 if (!ctx->db || !ctx->db_meth) {
159 OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_CONFIG_DATABASE);
162 if (!(ext_struc = method->r2i(method, ctx, value)))
165 OPENSSL_PUT_ERROR(X509V3, X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
166 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
170 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
172 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
174 method->ext_free(ext_struc);
179 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
180 int ext_nid, int crit, void *ext_struc)
182 unsigned char *ext_der;
184 ASN1_OCTET_STRING *ext_oct;
186 /* Convert internal representation to DER */
190 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)))
199 method->i2d(ext_struc, &p);
201 if (!(ext_oct = M_ASN1_OCTET_STRING_new()))
203 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 M_ASN1_OCTET_STRING_free(ext_oct);
214 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
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 OPENSSL_PUT_ERROR(X509V3, 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 OPENSSL_PUT_ERROR(X509V3, X509V3_R_EXTENSION_NAME_ERROR);
276 ERR_add_error_data(2, "name=", ext);
281 ext_der = string_to_hex(value, &ext_len);
282 else if (gen_type == 2)
283 ext_der = generic_asn1(value, ctx, &ext_len);
285 if (ext_der == NULL) {
286 OPENSSL_PUT_ERROR(X509V3, X509V3_R_EXTENSION_VALUE_ERROR);
287 ERR_add_error_data(2, "value=", value);
291 if (!(oct = M_ASN1_OCTET_STRING_new())) {
292 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
297 oct->length = ext_len;
300 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
303 ASN1_OBJECT_free(obj);
304 M_ASN1_OCTET_STRING_free(oct);
306 OPENSSL_free(ext_der);
311 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx,
315 unsigned char *ext_der = NULL;
316 typ = ASN1_generate_v3(value, ctx);
319 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
325 * This is the main function: add a bunch of extensions based on a config
326 * file section to an extension STACK.
329 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
330 STACK_OF(X509_EXTENSION) **sk)
333 STACK_OF(CONF_VALUE) *nval;
336 if (!(nval = NCONF_get_section(conf, section)))
338 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
339 val = sk_CONF_VALUE_value(nval, i);
340 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
343 X509v3_add_ext(sk, ext, -1);
344 X509_EXTENSION_free(ext);
350 * Convenience functions to add extensions to a certificate, CRL and request
353 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
356 STACK_OF(X509_EXTENSION) **sk = NULL;
358 sk = &cert->cert_info->extensions;
359 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
362 /* Same as above but for a CRL */
364 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
367 STACK_OF(X509_EXTENSION) **sk = NULL;
369 sk = &crl->crl->extensions;
370 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
373 /* Add extensions to certificate request */
375 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
378 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
382 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
385 i = X509_REQ_add_extensions(req, extlist);
386 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
390 /* Config database functions */
392 char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
394 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
395 OPENSSL_PUT_ERROR(X509V3, X509V3_R_OPERATION_NOT_DEFINED);
398 if (ctx->db_meth->get_string)
399 return ctx->db_meth->get_string(ctx->db, name, section);
403 STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section)
405 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
406 OPENSSL_PUT_ERROR(X509V3, X509V3_R_OPERATION_NOT_DEFINED);
409 if (ctx->db_meth->get_section)
410 return ctx->db_meth->get_section(ctx->db, section);
414 void X509V3_string_free(X509V3_CTX *ctx, char *str)
418 if (ctx->db_meth->free_string)
419 ctx->db_meth->free_string(ctx->db, str);
422 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
426 if (ctx->db_meth->free_section)
427 ctx->db_meth->free_section(ctx->db, section);
430 static char *nconf_get_string(void *db, char *section, char *value)
432 /* TODO(fork): this should return a const value. */
433 return (char *)NCONF_get_string(db, section, value);
436 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
438 return NCONF_get_section(db, section);
441 static const X509V3_CONF_METHOD nconf_method = {
448 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
450 ctx->db_meth = &nconf_method;
454 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
455 X509_CRL *crl, int flags)
457 ctx->issuer_cert = issuer;
458 ctx->subject_cert = subj;
460 ctx->subject_req = req;