1 /* v3_conf.c */ 2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 3 * project 1999. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1999-2002 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 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 18 * distribution. 19 * 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/)" 24 * 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 (at) OpenSSL.org. 29 * 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. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 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 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). 56 * 57 */ 58 /* extension creation utilities */ 59 60 61 62 #include <stdio.h> 63 #include <ctype.h> 64 #include "cryptlib.h" 65 #include <openssl/conf.h> 66 #include <openssl/x509.h> 67 #include <openssl/x509v3.h> 68 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, 82 char *value) 83 { 84 int crit; 85 int ext_type; 86 X509_EXTENSION *ret; 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); 91 if (!ret) 92 { 93 X509V3err(X509V3_F_X509V3_EXT_NCONF,X509V3_R_ERROR_IN_EXTENSION); 94 ERR_add_error_data(4,"name=", name, ", value=", value); 95 } 96 return ret; 97 } 98 99 /* CONF *conf: Config file */ 100 /* char *value: Value */ 101 X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid, 102 char *value) 103 { 104 int crit; 105 int ext_type; 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); 111 } 112 113 /* 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) 117 { 118 const X509V3_EXT_METHOD *method; 119 X509_EXTENSION *ext; 120 STACK_OF(CONF_VALUE) *nval; 121 void *ext_struc; 122 if (ext_nid == NID_undef) 123 { 124 X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION_NAME); 125 return NULL; 126 } 127 if (!(method = X509V3_EXT_get_nid(ext_nid))) 128 { 129 X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_UNKNOWN_EXTENSION); 130 return NULL; 131 } 132 /* Now get internal extension representation based on type */ 133 if (method->v2i) 134 { 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) 138 { 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); 141 return NULL; 142 } 143 ext_struc = method->v2i(method, ctx, nval); 144 if(*value != '@') sk_CONF_VALUE_pop_free(nval, 145 X509V3_conf_free); 146 if(!ext_struc) return NULL; 147 } 148 else if(method->s2i) 149 { 150 if(!(ext_struc = method->s2i(method, ctx, value))) return NULL; 151 } 152 else if(method->r2i) 153 { 154 if(!ctx->db || !ctx->db_meth) 155 { 156 X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_NO_CONFIG_DATABASE); 157 return NULL; 158 } 159 if(!(ext_struc = method->r2i(method, ctx, value))) return NULL; 160 } 161 else 162 { 163 X509V3err(X509V3_F_DO_EXT_NCONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED); 164 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid)); 165 return NULL; 166 } 167 168 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); 171 return ext; 172 173 } 174 175 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, int ext_nid, 176 int crit, void *ext_struc) 177 { 178 unsigned char *ext_der; 179 int ext_len; 180 ASN1_OCTET_STRING *ext_oct; 181 X509_EXTENSION *ext; 182 /* Convert internal representation to DER */ 183 if (method->it) 184 { 185 ext_der = NULL; 186 ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it)); 187 if (ext_len < 0) goto merr; 188 } 189 else 190 { 191 unsigned char *p; 192 ext_len = method->i2d(ext_struc, NULL); 193 if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr; 194 p = ext_der; 195 method->i2d(ext_struc, &p); 196 } 197 if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr; 198 ext_oct->data = ext_der; 199 ext_oct->length = ext_len; 200 201 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct); 202 if (!ext) goto merr; 203 M_ASN1_OCTET_STRING_free(ext_oct); 204 205 return ext; 206 207 merr: 208 X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE); 209 return NULL; 210 211 } 212 213 /* Given an internal structure, nid and critical flag create an extension */ 214 215 X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc) 216 { 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); 220 return NULL; 221 } 222 return do_ext_i2d(method, ext_nid, crit, ext_struc); 223 } 224 225 /* Check the extension string for critical flag */ 226 static int v3_check_critical(char **value) 227 { 228 char *p = *value; 229 if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0; 230 p+=9; 231 while(isspace((unsigned char)*p)) p++; 232 *value = p; 233 return 1; 234 } 235 236 /* Check extension string for generic extension and return the type */ 237 static int v3_check_generic(char **value) 238 { 239 int gen_type = 0; 240 char *p = *value; 241 if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) 242 { 243 p+=4; 244 gen_type = 1; 245 } 246 else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) 247 { 248 p+=5; 249 gen_type = 2; 250 } 251 else 252 return 0; 253 254 while (isspace((unsigned char)*p)) p++; 255 *value = p; 256 return gen_type; 257 } 258 259 /* 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, 262 X509V3_CTX *ctx) 263 { 264 unsigned char *ext_der=NULL; 265 long ext_len; 266 ASN1_OBJECT *obj=NULL; 267 ASN1_OCTET_STRING *oct=NULL; 268 X509_EXTENSION *extension=NULL; 269 if (!(obj = OBJ_txt2obj(ext, 0))) 270 { 271 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR); 272 ERR_add_error_data(2, "name=", ext); 273 goto err; 274 } 275 276 if (gen_type == 1) 277 ext_der = string_to_hex(value, &ext_len); 278 else if (gen_type == 2) 279 ext_der = generic_asn1(value, ctx, &ext_len); 280 281 if (ext_der == NULL) 282 { 283 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR); 284 ERR_add_error_data(2, "value=", value); 285 goto err; 286 } 287 288 if (!(oct = M_ASN1_OCTET_STRING_new())) 289 { 290 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE); 291 goto err; 292 } 293 294 oct->data = ext_der; 295 oct->length = ext_len; 296 ext_der = NULL; 297 298 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct); 299 300 err: 301 ASN1_OBJECT_free(obj); 302 M_ASN1_OCTET_STRING_free(oct); 303 if(ext_der) OPENSSL_free(ext_der); 304 return extension; 305 306 } 307 308 static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, long *ext_len) 309 { 310 ASN1_TYPE *typ; 311 unsigned char *ext_der = NULL; 312 typ = ASN1_generate_v3(value, ctx); 313 if (typ == NULL) 314 return NULL; 315 *ext_len = i2d_ASN1_TYPE(typ, &ext_der); 316 ASN1_TYPE_free(typ); 317 return ext_der; 318 } 319 320 /* This is the main function: add a bunch of extensions based on a config file 321 * section to an extension STACK. 322 */ 323 324 325 int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section, 326 STACK_OF(X509_EXTENSION) **sk) 327 { 328 X509_EXTENSION *ext; 329 STACK_OF(CONF_VALUE) *nval; 330 CONF_VALUE *val; 331 int i; 332 if (!(nval = NCONF_get_section(conf, section))) return 0; 333 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) 334 { 335 val = sk_CONF_VALUE_value(nval, i); 336 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value))) 337 return 0; 338 if (sk) X509v3_add_ext(sk, ext, -1); 339 X509_EXTENSION_free(ext); 340 } 341 return 1; 342 } 343 344 /* Convenience functions to add extensions to a certificate, CRL and request */ 345 346 int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 347 X509 *cert) 348 { 349 STACK_OF(X509_EXTENSION) **sk = NULL; 350 if (cert) 351 sk = &cert->cert_info->extensions; 352 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 353 } 354 355 /* Same as above but for a CRL */ 356 357 int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 358 X509_CRL *crl) 359 { 360 STACK_OF(X509_EXTENSION) **sk = NULL; 361 if (crl) 362 sk = &crl->crl->extensions; 363 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 364 } 365 366 /* Add extensions to certificate request */ 367 368 int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 369 X509_REQ *req) 370 { 371 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL; 372 int i; 373 if (req) 374 sk = &extlist; 375 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 376 if (!i || !sk) 377 return i; 378 i = X509_REQ_add_extensions(req, extlist); 379 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free); 380 return i; 381 } 382 383 /* Config database functions */ 384 385 char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section) 386 { 387 if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) 388 { 389 X509V3err(X509V3_F_X509V3_GET_STRING,X509V3_R_OPERATION_NOT_DEFINED); 390 return NULL; 391 } 392 if (ctx->db_meth->get_string) 393 return ctx->db_meth->get_string(ctx->db, name, section); 394 return NULL; 395 } 396 397 STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section) 398 { 399 if(!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) 400 { 401 X509V3err(X509V3_F_X509V3_GET_SECTION,X509V3_R_OPERATION_NOT_DEFINED); 402 return NULL; 403 } 404 if (ctx->db_meth->get_section) 405 return ctx->db_meth->get_section(ctx->db, section); 406 return NULL; 407 } 408 409 void X509V3_string_free(X509V3_CTX *ctx, char *str) 410 { 411 if (!str) return; 412 if (ctx->db_meth->free_string) 413 ctx->db_meth->free_string(ctx->db, str); 414 } 415 416 void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section) 417 { 418 if (!section) return; 419 if (ctx->db_meth->free_section) 420 ctx->db_meth->free_section(ctx->db, section); 421 } 422 423 static char *nconf_get_string(void *db, char *section, char *value) 424 { 425 return NCONF_get_string(db, section, value); 426 } 427 428 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section) 429 { 430 return NCONF_get_section(db, section); 431 } 432 433 static X509V3_CONF_METHOD nconf_method = { 434 nconf_get_string, 435 nconf_get_section, 436 NULL, 437 NULL 438 }; 439 440 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf) 441 { 442 ctx->db_meth = &nconf_method; 443 ctx->db = conf; 444 } 445 446 void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req, 447 X509_CRL *crl, int flags) 448 { 449 ctx->issuer_cert = issuer; 450 ctx->subject_cert = subj; 451 ctx->crl = crl; 452 ctx->subject_req = req; 453 ctx->flags = flags; 454 } 455 456 /* Old conf compatibility functions */ 457 458 X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 459 char *name, char *value) 460 { 461 CONF ctmp; 462 CONF_set_nconf(&ctmp, conf); 463 return X509V3_EXT_nconf(&ctmp, ctx, name, value); 464 } 465 466 /* 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) 470 { 471 CONF ctmp; 472 CONF_set_nconf(&ctmp, conf); 473 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value); 474 } 475 476 static char *conf_lhash_get_string(void *db, char *section, char *value) 477 { 478 return CONF_get_string(db, section, value); 479 } 480 481 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section) 482 { 483 return CONF_get_section(db, section); 484 } 485 486 static X509V3_CONF_METHOD conf_lhash_method = { 487 conf_lhash_get_string, 488 conf_lhash_get_section, 489 NULL, 490 NULL 491 }; 492 493 void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash) 494 { 495 ctx->db_meth = &conf_lhash_method; 496 ctx->db = lhash; 497 } 498 499 int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 500 char *section, X509 *cert) 501 { 502 CONF ctmp; 503 CONF_set_nconf(&ctmp, conf); 504 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert); 505 } 506 507 /* Same as above but for a CRL */ 508 509 int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 510 char *section, X509_CRL *crl) 511 { 512 CONF ctmp; 513 CONF_set_nconf(&ctmp, conf); 514 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl); 515 } 516 517 /* Add extensions to certificate request */ 518 519 int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 520 char *section, X509_REQ *req) 521 { 522 CONF ctmp; 523 CONF_set_nconf(&ctmp, conf); 524 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req); 525 } 526
