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_conf(LHASH *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 /* LHASH *conf: Config file */
78 /* char *name: Name */
79 /* char *value: Value */
80 X509_EXTENSION *X509V3_EXT_conf(LHASH *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_conf(conf, ctx, OBJ_sn2nid(name), crit, value);
91 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_ERROR_IN_EXTENSION);
92 ERR_add_error_data(4,"name=", name, ", value=", value);
97 /* LHASH *conf: Config file */
98 /* char *value: Value */
99 X509_EXTENSION *X509V3_EXT_conf_nid(LHASH *conf, X509V3_CTX *ctx, int ext_nid,
104 crit = v3_check_critical(&value);
105 if((ext_type = v3_check_generic(&value)))
106 return v3_generic_extension(OBJ_nid2sn(ext_nid),
107 value, crit, ext_type);
108 return do_ext_conf(conf, ctx, ext_nid, crit, value);
111 /* LHASH *conf: Config file */
112 /* char *value: Value */
113 static X509_EXTENSION *do_ext_conf(LHASH *conf, X509V3_CTX *ctx, int ext_nid,
114 int crit, char *value)
116 X509V3_EXT_METHOD *method;
118 STACK_OF(CONF_VALUE) *nval;
120 if(ext_nid == NID_undef) {
121 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION_NAME);
124 if(!(method = X509V3_EXT_get_nid(ext_nid))) {
125 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION);
128 /* Now get internal extension representation based on type */
130 if(*value == '@') nval = CONF_get_section(conf, value + 1);
131 else nval = X509V3_parse_list(value);
133 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_INVALID_EXTENSION_STRING);
134 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value);
137 ext_struc = method->v2i(method, ctx, nval);
138 if(*value != '@') sk_CONF_VALUE_pop_free(nval,
140 if(!ext_struc) return NULL;
141 } else if(method->s2i) {
142 if(!(ext_struc = method->s2i(method, ctx, value))) return NULL;
143 } else if(method->r2i) {
145 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_NO_CONFIG_DATABASE);
148 if(!(ext_struc = method->r2i(method, ctx, value))) return NULL;
150 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
151 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
155 ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
156 if(method->it) ASN1_item_free(ext_struc, method->it);
157 else method->ext_free(ext_struc);
162 static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid,
163 int crit, void *ext_struc)
165 unsigned char *ext_der;
167 ASN1_OCTET_STRING *ext_oct;
169 /* Convert internal representation to DER */
172 ext_len = ASN1_item_i2d(ext_struc, &ext_der, method->it);
173 if(ext_len < 0) goto merr;
176 ext_len = method->i2d(ext_struc, NULL);
177 if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr;
179 method->i2d(ext_struc, &p);
181 if(!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr;
182 ext_oct->data = ext_der;
183 ext_oct->length = ext_len;
185 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
187 M_ASN1_OCTET_STRING_free(ext_oct);
192 X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE);
197 /* Given an internal structure, nid and critical flag create an extension */
199 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
201 X509V3_EXT_METHOD *method;
202 if(!(method = X509V3_EXT_get_nid(ext_nid))) {
203 X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION);
206 return do_ext_i2d(method, ext_nid, crit, ext_struc);
209 /* Check the extension string for critical flag */
210 static int v3_check_critical(char **value)
213 if((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0;
215 while(isspace((unsigned char)*p)) p++;
220 /* Check extension string for generic extension and return the type */
221 static int v3_check_generic(char **value)
224 if((strlen(p) < 4) || strncmp(p, "DER:,", 4)) return 0;
226 while(isspace((unsigned char)*p)) p++;
231 /* Create a generic extension: for now just handle DER type */
232 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
235 unsigned char *ext_der=NULL;
237 ASN1_OBJECT *obj=NULL;
238 ASN1_OCTET_STRING *oct=NULL;
239 X509_EXTENSION *extension=NULL;
240 if(!(obj = OBJ_txt2obj(ext, 0))) {
241 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR);
242 ERR_add_error_data(2, "name=", ext);
246 if(!(ext_der = string_to_hex(value, &ext_len))) {
247 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR);
248 ERR_add_error_data(2, "value=", value);
252 if(!(oct = M_ASN1_OCTET_STRING_new())) {
253 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE);
258 oct->length = ext_len;
261 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
264 ASN1_OBJECT_free(obj);
265 M_ASN1_OCTET_STRING_free(oct);
266 if(ext_der) OPENSSL_free(ext_der);
271 /* This is the main function: add a bunch of extensions based on a config file
275 int X509V3_EXT_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
279 STACK_OF(CONF_VALUE) *nval;
282 if(!(nval = CONF_get_section(conf, section))) return 0;
283 for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
284 val = sk_CONF_VALUE_value(nval, i);
285 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value)))
287 if(cert) X509_add_ext(cert, ext, -1);
288 X509_EXTENSION_free(ext);
293 /* Same as above but for a CRL */
295 int X509V3_EXT_CRL_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
299 STACK_OF(CONF_VALUE) *nval;
302 if(!(nval = CONF_get_section(conf, section))) return 0;
303 for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
304 val = sk_CONF_VALUE_value(nval, i);
305 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value)))
307 if(crl) X509_CRL_add_ext(crl, ext, -1);
308 X509_EXTENSION_free(ext);
313 /* Add extensions to certificate request */
315 int X509V3_EXT_REQ_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section,
319 STACK_OF(X509_EXTENSION) *extlist = NULL;
320 STACK_OF(CONF_VALUE) *nval;
323 if(!(nval = CONF_get_section(conf, section))) return 0;
324 for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
325 val = sk_CONF_VALUE_value(nval, i);
326 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value)))
328 if(!extlist) extlist = sk_X509_EXTENSION_new_null();
329 sk_X509_EXTENSION_push(extlist, ext);
331 if(req) i = X509_REQ_add_extensions(req, extlist);
333 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free);
337 /* Config database functions */
339 char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section)
341 if(ctx->db_meth->get_string)
342 return ctx->db_meth->get_string(ctx->db, name, section);
346 STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section)
348 if(ctx->db_meth->get_section)
349 return ctx->db_meth->get_section(ctx->db, section);
353 void X509V3_string_free(X509V3_CTX *ctx, char *str)
356 if(ctx->db_meth->free_string)
357 ctx->db_meth->free_string(ctx->db, str);
360 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
363 if(ctx->db_meth->free_section)
364 ctx->db_meth->free_section(ctx->db, section);
367 static char *conf_lhash_get_string(void *db, char *section, char *value)
369 return CONF_get_string(db, section, value);
372 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
374 return CONF_get_section(db, section);
377 static X509V3_CONF_METHOD conf_lhash_method = {
378 conf_lhash_get_string,
379 conf_lhash_get_section,
384 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH *lhash)
386 ctx->db_meth = &conf_lhash_method;
390 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
391 X509_CRL *crl, int flags)
393 ctx->issuer_cert = issuer;
394 ctx->subject_cert = subj;
396 ctx->subject_req = req;