2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 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);
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(X509V3_EXT_METHOD *method, int ext_nid,
76 int crit, void *ext_struc);
77 /* CONF *conf: Config file */
78 /* char *name: Name */
79 /* char *value: Value */
80 X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name,
86 crit = v3_check_critical(&value);
87 if ((ext_type = v3_check_generic(&value)))
88 return v3_generic_extension(name, value, crit, ext_type);
89 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
92 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_ERROR_IN_EXTENSION);
93 ERR_add_error_data(4,"name=", name, ", value=", value);
98 /* CONF *conf: Config file */
99 /* char *value: Value */
100 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
105 crit = v3_check_critical(&value);
106 if ((ext_type = v3_check_generic(&value)))
107 return v3_generic_extension(OBJ_nid2sn(ext_nid),
108 value, crit, ext_type);
109 return do_ext_nconf(conf, ctx, ext_nid, crit, value);
112 /* CONF *conf: Config file */
113 /* char *value: Value */
114 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
115 int crit, char *value)
117 X509V3_EXT_METHOD *method;
119 STACK_OF(CONF_VALUE) *nval;
121 if (ext_nid == NID_undef)
123 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION_NAME);
126 if (!(method = X509V3_EXT_get_nid(ext_nid)))
128 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION);
131 /* Now get internal extension representation based on type */
134 if(*value == '@') nval = NCONF_get_section(conf, value + 1);
135 else nval = X509V3_parse_list(value);
138 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_INVALID_EXTENSION_STRING);
139 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value);
142 ext_struc = method->v2i(method, ctx, nval);
143 if(*value != '@') sk_CONF_VALUE_pop_free(nval,
145 if(!ext_struc) return NULL;
149 if(!(ext_struc = method->s2i(method, ctx, value))) return NULL;
155 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_NO_CONFIG_DATABASE);
158 if(!(ext_struc = method->r2i(method, ctx, value))) return NULL;
162 X509V3err(X509V3_F_X509V3_EXT_CONF,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);
168 if(method->it) ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
169 else method->ext_free(ext_struc);
174 static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid,
175 int crit, void *ext_struc)
177 unsigned char *ext_der;
179 ASN1_OCTET_STRING *ext_oct;
181 /* Convert internal representation to DER */
185 ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
186 if (ext_len < 0) goto merr;
191 ext_len = method->i2d(ext_struc, NULL);
192 if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr;
194 method->i2d(ext_struc, &p);
196 if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr;
197 ext_oct->data = ext_der;
198 ext_oct->length = ext_len;
200 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
202 M_ASN1_OCTET_STRING_free(ext_oct);
207 X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE);
212 /* Given an internal structure, nid and critical flag create an extension */
214 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
216 X509V3_EXT_METHOD *method;
217 if (!(method = X509V3_EXT_get_nid(ext_nid))) {
218 X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION);
221 return do_ext_i2d(method, ext_nid, crit, ext_struc);
224 /* Check the extension string for critical flag */
225 static int v3_check_critical(char **value)
228 if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0;
230 while(isspace((unsigned char)*p)) p++;
235 /* Check extension string for generic extension and return the type */
236 static int v3_check_generic(char **value)
239 if ((strlen(p) < 4) || strncmp(p, "DER:,", 4)) return 0;
241 while (isspace((unsigned char)*p)) p++;
246 /* Create a generic extension: for now just handle DER type */
247 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
250 unsigned char *ext_der=NULL;
252 ASN1_OBJECT *obj=NULL;
253 ASN1_OCTET_STRING *oct=NULL;
254 X509_EXTENSION *extension=NULL;
255 if (!(obj = OBJ_txt2obj(ext, 0)))
257 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR);
258 ERR_add_error_data(2, "name=", ext);
262 if (!(ext_der = string_to_hex(value, &ext_len)))
264 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR);
265 ERR_add_error_data(2, "value=", value);
269 if (!(oct = M_ASN1_OCTET_STRING_new()))
271 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE);
276 oct->length = ext_len;
279 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
282 ASN1_OBJECT_free(obj);
283 M_ASN1_OCTET_STRING_free(oct);
284 if(ext_der) OPENSSL_free(ext_der);
290 /* This is the main function: add a bunch of extensions based on a config file
291 * section to an extension STACK.
295 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section,
296 STACK_OF(X509_EXTENSION) **sk)
299 STACK_OF(CONF_VALUE) *nval;
302 if (!(nval = NCONF_get_section(conf, section))) return 0;
303 for (i = 0; i < sk_CONF_VALUE_num(nval); i++)
305 val = sk_CONF_VALUE_value(nval, i);
306 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value)))
308 if (sk) X509v3_add_ext(sk, ext, -1);
309 X509_EXTENSION_free(ext);
314 /* Convenience functions to add extensions to a certificate, CRL and request */
316 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
319 STACK_OF(X509_EXTENSION) **sk = NULL;
321 sk = &cert->cert_info->extensions;
322 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
325 /* Same as above but for a CRL */
327 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
330 STACK_OF(X509_EXTENSION) **sk = NULL;
332 sk = &crl->crl->extensions;
333 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
336 /* Add extensions to certificate request */
338 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section,
341 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL;
345 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
348 i = X509_REQ_add_extensions(req, extlist);
349 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
353 /* Config database functions */
355 char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
357 if (ctx->db_meth->get_string)
358 return ctx->db_meth->get_string(ctx->db, name, section);
362 STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section)
364 if (ctx->db_meth->get_section)
365 return ctx->db_meth->get_section(ctx->db, section);
369 void X509V3_string_free(X509V3_CTX *ctx, char *str)
372 if (ctx->db_meth->free_string)
373 ctx->db_meth->free_string(ctx->db, str);
376 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
378 if (!section) return;
379 if (ctx->db_meth->free_section)
380 ctx->db_meth->free_section(ctx->db, section);
383 static char *nconf_get_string(void *db, char *section, char *value)
385 return NCONF_get_string(db, section, value);
388 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
390 return NCONF_get_section(db, section);
393 static X509V3_CONF_METHOD nconf_method = {
400 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
402 ctx->db_meth = &nconf_method;
406 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
407 X509_CRL *crl, int flags)
409 ctx->issuer_cert = issuer;
410 ctx->subject_cert = subj;
412 ctx->subject_req = req;
416 /* Old conf compatibility functions */
418 X509_EXTENSION *X509V3_EXT_conf(LHASH *conf, X509V3_CTX *ctx, char *name,
422 CONF_set_nconf(&ctmp, conf);
423 return X509V3_EXT_nconf(&ctmp, ctx, name, value);
426 /* LHASH *conf: Config file */
427 /* char *value: Value */
428 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH *conf, X509V3_CTX *ctx, int ext_nid,
432 CONF_set_nconf(&ctmp, conf);
433 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value);
436 static char *conf_lhash_get_string(void *db, char *section, char *value)
438 return CONF_get_string(db, section, value);
441 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
443 return CONF_get_section(db, section);
446 static X509V3_CONF_METHOD conf_lhash_method = {
447 conf_lhash_get_string,
448 conf_lhash_get_section,
453 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH *lhash)
455 ctx->db_meth = &conf_lhash_method;
459 int X509V3_EXT_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
463 CONF_set_nconf(&ctmp, conf);
464 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert);
467 /* Same as above but for a CRL */
469 int X509V3_EXT_CRL_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
473 CONF_set_nconf(&ctmp, conf);
474 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl);
477 /* Add extensions to certificate request */
479 int X509V3_EXT_REQ_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
483 CONF_set_nconf(&ctmp, conf);
484 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req);