2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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 */
65 #include <openssl/conf.h>
66 #include <openssl/x509.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, int crit, char *value);
72 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, int crit, int type, X509V3_CTX *ctx);
73 static char *conf_lhash_get_string(void *db, char *section, char *value);
74 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section);
75 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, int ext_nid,
76 int crit, void *ext_struc);
77 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len);
78 /* CONF *conf: Config file */
79 /* char *name: Name */
80 /* char *value: Value */
81 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
87 crit = v3_check_critical(&value);
88 if ((ext_type = v3_check_generic(&value)))
89 return v3_generic_extension(name, value, crit, ext_type, ctx);
90 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
93 X509V3err(X509V3_F_X509V3_EXT_NCONF,X509V3_R_ERROR_IN_EXTENSION);
94 ERR_add_error_data(4,"name=", name, ", value=", value);
99 /* CONF *conf: Config file */
100 /* char *value: Value */
101 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
106 crit = v3_check_critical(&value);
107 if ((ext_type = v3_check_generic(&value)))
108 return v3_generic_extension(OBJ_nid2sn(ext_nid),
109 value, crit, ext_type, ctx);
110 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
113 /* CONF *conf: Config file */
114 /* char *value: Value */
115 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
116 int crit, char *value)
118 const X509V3_EXT_METHOD *method;
120 STACK_OF(CONF_VALUE) *nval;
122 if (ext_nid == NID_undef)
124 X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION_NAME);
127 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 if(*value == '@') nval = NCONF_get_section(conf, value + 1);
136 else nval = X509V3_parse_list(value);
137 if(sk_CONF_VALUE_num(nval) <= 0)
139 X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_INVALID_EXTENSION_STRING);
140 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value);
143 ext_struc = method->v2i(method, ctx, nval);
144 if(*value != '@') sk_CONF_VALUE_pop_free(nval,
146 if(!ext_struc) return NULL;
150 if(!(ext_struc = method->s2i(method, ctx, value))) return NULL;
154 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))) return NULL;
163 X509V3err(X509V3_F_DO_EXT_NCONF,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);
169 if(method->it) ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
170 else method->ext_free(ext_struc);
175 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, int ext_nid,
176 int crit, void *ext_struc)
178 unsigned char *ext_der;
180 ASN1_OCTET_STRING *ext_oct;
182 /* Convert internal representation to DER */
186 ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
187 if (ext_len < 0) goto merr;
192 ext_len = method->i2d(ext_struc, NULL);
193 if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr;
195 method->i2d(ext_struc, &p);
197 if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr;
198 ext_oct->data = ext_der;
199 ext_oct->length = ext_len;
201 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
203 M_ASN1_OCTET_STRING_free(ext_oct);
208 X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE);
213 /* Given an internal structure, nid and critical flag create an extension */
215 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
217 const X509V3_EXT_METHOD *method;
218 if (!(method = X509V3_EXT_get_nid(ext_nid))) {
219 X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION);
222 return do_ext_i2d(method, ext_nid, crit, ext_struc);
225 /* Check the extension string for critical flag */
226 static int v3_check_critical(char **value)
229 if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0;
231 while(isspace((unsigned char)*p)) p++;
236 /* Check extension string for generic extension and return the type */
237 static int v3_check_generic(char **value)
241 if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4))
246 else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5))
254 while (isspace((unsigned char)*p)) p++;
259 /* Create a generic extension: for now just handle DER type */
260 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
261 int crit, int gen_type,
264 unsigned char *ext_der=NULL;
266 ASN1_OBJECT *obj=NULL;
267 ASN1_OCTET_STRING *oct=NULL;
268 X509_EXTENSION *extension=NULL;
269 if (!(obj = OBJ_txt2obj(ext, 0)))
271 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR);
272 ERR_add_error_data(2, "name=", ext);
277 ext_der = string_to_hex(value, &ext_len);
278 else if (gen_type == 2)
279 ext_der = generic_asn1(value, ctx, &ext_len);
283 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR);
284 ERR_add_error_data(2, "value=", value);
288 if (!(oct = M_ASN1_OCTET_STRING_new()))
290 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE);
295 oct->length = ext_len;
298 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
301 ASN1_OBJECT_free(obj);
302 M_ASN1_OCTET_STRING_free(oct);
303 if(ext_der) OPENSSL_free(ext_der);
308 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len)
311 unsigned char *ext_der = NULL;
312 typ = ASN1_generate_v3(value, ctx);
315 *ext_len = i2d_ASN1_TYPE(typ, &ext_der);
320 /* This is the main function: add a bunch of extensions based on a config file
321 * section to an extension STACK.
325 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
326 STACK_OF(X509_EXTENSION) **sk)
329 STACK_OF(CONF_VALUE) *nval;
332 if (!(nval = NCONF_get_section(conf, section))) return 0;
333 for (i = 0; i < sk_CONF_VALUE_num(nval); i++)
335 val = sk_CONF_VALUE_value(nval, i);
336 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
338 if (sk) X509v3_add_ext(sk, ext, -1);
339 X509_EXTENSION_free(ext);
344 /* Convenience functions to add extensions to a certificate, CRL and request */
346 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
349 STACK_OF(X509_EXTENSION) **sk = NULL;
351 sk = &cert->cert_info->extensions;
352 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
355 /* Same as above but for a CRL */
357 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
360 STACK_OF(X509_EXTENSION) **sk = NULL;
362 sk = &crl->crl->extensions;
363 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
366 /* Add extensions to certificate request */
368 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
371 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
375 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
378 i = X509_REQ_add_extensions(req, extlist);
379 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
383 /* Config database functions */
385 char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
387 if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string)
389 X509V3err(X509V3_F_X509V3_GET_STRING,X509V3_R_OPERATION_NOT_DEFINED);
392 if (ctx->db_meth->get_string)
393 return ctx->db_meth->get_string(ctx->db, name, section);
397 STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section)
399 if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section)
401 X509V3err(X509V3_F_X509V3_GET_SECTION,X509V3_R_OPERATION_NOT_DEFINED);
404 if (ctx->db_meth->get_section)
405 return ctx->db_meth->get_section(ctx->db, section);
409 void X509V3_string_free(X509V3_CTX *ctx, char *str)
412 if (ctx->db_meth->free_string)
413 ctx->db_meth->free_string(ctx->db, str);
416 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
418 if (!section) return;
419 if (ctx->db_meth->free_section)
420 ctx->db_meth->free_section(ctx->db, section);
423 static char *nconf_get_string(void *db, char *section, char *value)
425 return NCONF_get_string(db, section, value);
428 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
430 return NCONF_get_section(db, section);
433 static X509V3_CONF_METHOD nconf_method = {
440 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
442 ctx->db_meth = &nconf_method;
446 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
447 X509_CRL *crl, int flags)
449 ctx->issuer_cert = issuer;
450 ctx->subject_cert = subj;
452 ctx->subject_req = req;
456 /* Old conf compatibility functions */
458 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
459 char *name, char *value)
462 CONF_set_nconf(&ctmp, conf);
463 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
466 /* LHASH *conf: Config file */
467 /* char *value: Value */
468 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
469 int ext_nid, char *value)
472 CONF_set_nconf(&ctmp, conf);
473 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
476 static char *conf_lhash_get_string(void *db, char *section, char *value)
478 return CONF_get_string(db, section, value);
481 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
483 return CONF_get_section(db, section);
486 static X509V3_CONF_METHOD conf_lhash_method = {
487 conf_lhash_get_string,
488 conf_lhash_get_section,
493 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
495 ctx->db_meth = &conf_lhash_method;
499 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
500 char *section, X509 *cert)
503 CONF_set_nconf(&ctmp, conf);
504 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
507 /* Same as above but for a CRL */
509 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
510 char *section, X509_CRL *crl)
513 CONF_set_nconf(&ctmp, conf);
514 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
517 /* Add extensions to certificate request */
519 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
520 char *section, X509_REQ *req)
523 CONF_set_nconf(&ctmp, conf);
524 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);