v3_conf.c revision 109998
1/* v3_conf.c */ 2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL 3 * project 1999. 4 */ 5/* ==================================================================== 6 * Copyright (c) 1999 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@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@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@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 69static int v3_check_critical(char **value); 70static int v3_check_generic(char **value); 71static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value); 72static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, int crit, int type); 73static char *conf_lhash_get_string(void *db, char *section, char *value); 74static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section); 75static 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 */ 80X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name, 81 char *value) 82 { 83 int crit; 84 int ext_type; 85 X509_EXTENSION *ret; 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); 90 if (!ret) 91 { 92 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_ERROR_IN_EXTENSION); 93 ERR_add_error_data(4,"name=", name, ", value=", value); 94 } 95 return ret; 96 } 97 98/* CONF *conf: Config file */ 99/* char *value: Value */ 100X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid, 101 char *value) 102 { 103 int crit; 104 int ext_type; 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); 110 } 111 112/* CONF *conf: Config file */ 113/* char *value: Value */ 114static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, 115 int crit, char *value) 116 { 117 X509V3_EXT_METHOD *method; 118 X509_EXTENSION *ext; 119 STACK_OF(CONF_VALUE) *nval; 120 void *ext_struc; 121 if (ext_nid == NID_undef) 122 { 123 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION_NAME); 124 return NULL; 125 } 126 if (!(method = X509V3_EXT_get_nid(ext_nid))) 127 { 128 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION); 129 return NULL; 130 } 131 /* Now get internal extension representation based on type */ 132 if (method->v2i) 133 { 134 if(*value == '@') nval = NCONF_get_section(conf, value + 1); 135 else nval = X509V3_parse_list(value); 136 if(!nval) 137 { 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); 140 return NULL; 141 } 142 ext_struc = method->v2i(method, ctx, nval); 143 if(*value != '@') sk_CONF_VALUE_pop_free(nval, 144 X509V3_conf_free); 145 if(!ext_struc) return NULL; 146 } 147 else if(method->s2i) 148 { 149 if(!(ext_struc = method->s2i(method, ctx, value))) return NULL; 150 } 151 else if(method->r2i) 152 { 153 if(!ctx->db) 154 { 155 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_NO_CONFIG_DATABASE); 156 return NULL; 157 } 158 if(!(ext_struc = method->r2i(method, ctx, value))) return NULL; 159 } 160 else 161 { 162 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED); 163 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid)); 164 return NULL; 165 } 166 167 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); 170 return ext; 171 172 } 173 174static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid, 175 int crit, void *ext_struc) 176 { 177 unsigned char *ext_der; 178 int ext_len; 179 ASN1_OCTET_STRING *ext_oct; 180 X509_EXTENSION *ext; 181 /* Convert internal representation to DER */ 182 if (method->it) 183 { 184 ext_der = NULL; 185 ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it)); 186 if (ext_len < 0) goto merr; 187 } 188 else 189 { 190 unsigned char *p; 191 ext_len = method->i2d(ext_struc, NULL); 192 if(!(ext_der = OPENSSL_malloc(ext_len))) goto merr; 193 p = ext_der; 194 method->i2d(ext_struc, &p); 195 } 196 if (!(ext_oct = M_ASN1_OCTET_STRING_new())) goto merr; 197 ext_oct->data = ext_der; 198 ext_oct->length = ext_len; 199 200 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct); 201 if (!ext) goto merr; 202 M_ASN1_OCTET_STRING_free(ext_oct); 203 204 return ext; 205 206 merr: 207 X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE); 208 return NULL; 209 210 } 211 212/* Given an internal structure, nid and critical flag create an extension */ 213 214X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc) 215 { 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); 219 return NULL; 220 } 221 return do_ext_i2d(method, ext_nid, crit, ext_struc); 222} 223 224/* Check the extension string for critical flag */ 225static int v3_check_critical(char **value) 226{ 227 char *p = *value; 228 if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0; 229 p+=9; 230 while(isspace((unsigned char)*p)) p++; 231 *value = p; 232 return 1; 233} 234 235/* Check extension string for generic extension and return the type */ 236static int v3_check_generic(char **value) 237{ 238 char *p = *value; 239 if ((strlen(p) < 4) || strncmp(p, "DER:,", 4)) return 0; 240 p+=4; 241 while (isspace((unsigned char)*p)) p++; 242 *value = p; 243 return 1; 244} 245 246/* Create a generic extension: for now just handle DER type */ 247static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, 248 int crit, int type) 249 { 250 unsigned char *ext_der=NULL; 251 long ext_len; 252 ASN1_OBJECT *obj=NULL; 253 ASN1_OCTET_STRING *oct=NULL; 254 X509_EXTENSION *extension=NULL; 255 if (!(obj = OBJ_txt2obj(ext, 0))) 256 { 257 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR); 258 ERR_add_error_data(2, "name=", ext); 259 goto err; 260 } 261 262 if (!(ext_der = string_to_hex(value, &ext_len))) 263 { 264 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR); 265 ERR_add_error_data(2, "value=", value); 266 goto err; 267 } 268 269 if (!(oct = M_ASN1_OCTET_STRING_new())) 270 { 271 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE); 272 goto err; 273 } 274 275 oct->data = ext_der; 276 oct->length = ext_len; 277 ext_der = NULL; 278 279 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct); 280 281 err: 282 ASN1_OBJECT_free(obj); 283 M_ASN1_OCTET_STRING_free(oct); 284 if(ext_der) OPENSSL_free(ext_der); 285 return extension; 286 287 } 288 289 290/* This is the main function: add a bunch of extensions based on a config file 291 * section to an extension STACK. 292 */ 293 294 295int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section, 296 STACK_OF(X509_EXTENSION) **sk) 297 { 298 X509_EXTENSION *ext; 299 STACK_OF(CONF_VALUE) *nval; 300 CONF_VALUE *val; 301 int i; 302 if (!(nval = NCONF_get_section(conf, section))) return 0; 303 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) 304 { 305 val = sk_CONF_VALUE_value(nval, i); 306 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value))) 307 return 0; 308 if (sk) X509v3_add_ext(sk, ext, -1); 309 X509_EXTENSION_free(ext); 310 } 311 return 1; 312 } 313 314/* Convenience functions to add extensions to a certificate, CRL and request */ 315 316int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 317 X509 *cert) 318 { 319 STACK_OF(X509_EXTENSION) **sk = NULL; 320 if (cert) 321 sk = &cert->cert_info->extensions; 322 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 323 } 324 325/* Same as above but for a CRL */ 326 327int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 328 X509_CRL *crl) 329 { 330 STACK_OF(X509_EXTENSION) **sk = NULL; 331 if (crl) 332 sk = &crl->crl->extensions; 333 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 334 } 335 336/* Add extensions to certificate request */ 337 338int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 339 X509_REQ *req) 340 { 341 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL; 342 int i; 343 if (req) 344 sk = &extlist; 345 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 346 if (!i || !sk) 347 return i; 348 i = X509_REQ_add_extensions(req, extlist); 349 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free); 350 return i; 351 } 352 353/* Config database functions */ 354 355char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section) 356 { 357 if (ctx->db_meth->get_string) 358 return ctx->db_meth->get_string(ctx->db, name, section); 359 return NULL; 360 } 361 362STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section) 363 { 364 if (ctx->db_meth->get_section) 365 return ctx->db_meth->get_section(ctx->db, section); 366 return NULL; 367 } 368 369void X509V3_string_free(X509V3_CTX *ctx, char *str) 370 { 371 if (!str) return; 372 if (ctx->db_meth->free_string) 373 ctx->db_meth->free_string(ctx->db, str); 374 } 375 376void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section) 377 { 378 if (!section) return; 379 if (ctx->db_meth->free_section) 380 ctx->db_meth->free_section(ctx->db, section); 381 } 382 383static char *nconf_get_string(void *db, char *section, char *value) 384 { 385 return NCONF_get_string(db, section, value); 386 } 387 388static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section) 389 { 390 return NCONF_get_section(db, section); 391 } 392 393static X509V3_CONF_METHOD nconf_method = { 394nconf_get_string, 395nconf_get_section, 396NULL, 397NULL 398}; 399 400void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf) 401 { 402 ctx->db_meth = &nconf_method; 403 ctx->db = conf; 404 } 405 406void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req, 407 X509_CRL *crl, int flags) 408 { 409 ctx->issuer_cert = issuer; 410 ctx->subject_cert = subj; 411 ctx->crl = crl; 412 ctx->subject_req = req; 413 ctx->flags = flags; 414 } 415 416/* Old conf compatibility functions */ 417 418X509_EXTENSION *X509V3_EXT_conf(LHASH *conf, X509V3_CTX *ctx, char *name, 419 char *value) 420 { 421 CONF ctmp; 422 CONF_set_nconf(&ctmp, conf); 423 return X509V3_EXT_nconf(&ctmp, ctx, name, value); 424 } 425 426/* LHASH *conf: Config file */ 427/* char *value: Value */ 428X509_EXTENSION *X509V3_EXT_conf_nid(LHASH *conf, X509V3_CTX *ctx, int ext_nid, 429 char *value) 430 { 431 CONF ctmp; 432 CONF_set_nconf(&ctmp, conf); 433 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value); 434 } 435 436static char *conf_lhash_get_string(void *db, char *section, char *value) 437 { 438 return CONF_get_string(db, section, value); 439 } 440 441static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section) 442 { 443 return CONF_get_section(db, section); 444 } 445 446static X509V3_CONF_METHOD conf_lhash_method = { 447conf_lhash_get_string, 448conf_lhash_get_section, 449NULL, 450NULL 451}; 452 453void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH *lhash) 454 { 455 ctx->db_meth = &conf_lhash_method; 456 ctx->db = lhash; 457 } 458 459int X509V3_EXT_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section, 460 X509 *cert) 461 { 462 CONF ctmp; 463 CONF_set_nconf(&ctmp, conf); 464 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert); 465 } 466 467/* Same as above but for a CRL */ 468 469int X509V3_EXT_CRL_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section, 470 X509_CRL *crl) 471 { 472 CONF ctmp; 473 CONF_set_nconf(&ctmp, conf); 474 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl); 475 } 476 477/* Add extensions to certificate request */ 478 479int X509V3_EXT_REQ_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section, 480 X509_REQ *req) 481 { 482 CONF ctmp; 483 CONF_set_nconf(&ctmp, conf); 484 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req); 485 } 486