v3_conf.c revision 296341
1/* v3_conf.c */ 2/* 3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4 * 1999. 5 */ 6/* ==================================================================== 7 * Copyright (c) 1999-2002 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59/* extension creation utilities */ 60 61#include <stdio.h> 62#include <ctype.h> 63#include "cryptlib.h" 64#include <openssl/conf.h> 65#include <openssl/x509.h> 66#include <openssl/x509v3.h> 67 68static int v3_check_critical(char **value); 69static int v3_check_generic(char **value); 70static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, 71 int crit, char *value); 72static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, 73 int crit, int type, 74 X509V3_CTX *ctx); 75static char *conf_lhash_get_string(void *db, char *section, char *value); 76static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section); 77static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, 78 int ext_nid, int crit, void *ext_struc); 79static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, 80 long *ext_len); 81/* CONF *conf: Config file */ 82/* char *name: Name */ 83/* char *value: Value */ 84X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, char *name, 85 char *value) 86{ 87 int crit; 88 int ext_type; 89 X509_EXTENSION *ret; 90 crit = v3_check_critical(&value); 91 if ((ext_type = v3_check_generic(&value))) 92 return v3_generic_extension(name, value, crit, ext_type, ctx); 93 ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value); 94 if (!ret) { 95 X509V3err(X509V3_F_X509V3_EXT_NCONF, X509V3_R_ERROR_IN_EXTENSION); 96 ERR_add_error_data(4, "name=", name, ", value=", value); 97 } 98 return ret; 99} 100 101/* CONF *conf: Config file */ 102/* char *value: Value */ 103X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid, 104 char *value) 105{ 106 int crit; 107 int ext_type; 108 crit = v3_check_critical(&value); 109 if ((ext_type = v3_check_generic(&value))) 110 return v3_generic_extension(OBJ_nid2sn(ext_nid), 111 value, crit, ext_type, ctx); 112 return do_ext_nconf(conf, ctx, ext_nid, crit, value); 113} 114 115/* CONF *conf: Config file */ 116/* char *value: Value */ 117static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, 118 int crit, char *value) 119{ 120 const X509V3_EXT_METHOD *method; 121 X509_EXTENSION *ext; 122 STACK_OF(CONF_VALUE) *nval; 123 void *ext_struc; 124 if (ext_nid == NID_undef) { 125 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION_NAME); 126 return NULL; 127 } 128 if (!(method = X509V3_EXT_get_nid(ext_nid))) { 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 if (*value == '@') 135 nval = NCONF_get_section(conf, value + 1); 136 else 137 nval = X509V3_parse_list(value); 138 if (sk_CONF_VALUE_num(nval) <= 0) { 139 X509V3err(X509V3_F_DO_EXT_NCONF, 140 X509V3_R_INVALID_EXTENSION_STRING); 141 ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", 142 value); 143 return NULL; 144 } 145 ext_struc = method->v2i(method, ctx, nval); 146 if (*value != '@') 147 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free); 148 if (!ext_struc) 149 return NULL; 150 } else if (method->s2i) { 151 if (!(ext_struc = method->s2i(method, ctx, value))) 152 return NULL; 153 } else if (method->r2i) { 154 if (!ctx->db || !ctx->db_meth) { 155 X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_NO_CONFIG_DATABASE); 156 return NULL; 157 } 158 if (!(ext_struc = method->r2i(method, ctx, value))) 159 return NULL; 160 } else { 161 X509V3err(X509V3_F_DO_EXT_NCONF, 162 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) 169 ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it)); 170 else 171 method->ext_free(ext_struc); 172 return ext; 173 174} 175 176static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method, 177 int ext_nid, int crit, void *ext_struc) 178{ 179 unsigned char *ext_der; 180 int ext_len; 181 ASN1_OCTET_STRING *ext_oct; 182 X509_EXTENSION *ext; 183 /* Convert internal representation to DER */ 184 if (method->it) { 185 ext_der = NULL; 186 ext_len = 187 ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it)); 188 if (ext_len < 0) 189 goto merr; 190 } else { 191 unsigned char *p; 192 ext_len = method->i2d(ext_struc, NULL); 193 if (!(ext_der = OPENSSL_malloc(ext_len))) 194 goto merr; 195 p = ext_der; 196 method->i2d(ext_struc, &p); 197 } 198 if (!(ext_oct = M_ASN1_OCTET_STRING_new())) 199 goto merr; 200 ext_oct->data = ext_der; 201 ext_oct->length = ext_len; 202 203 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct); 204 if (!ext) 205 goto merr; 206 M_ASN1_OCTET_STRING_free(ext_oct); 207 208 return ext; 209 210 merr: 211 X509V3err(X509V3_F_DO_EXT_I2D, ERR_R_MALLOC_FAILURE); 212 return NULL; 213 214} 215 216/* Given an internal structure, nid and critical flag create an extension */ 217 218X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc) 219{ 220 const X509V3_EXT_METHOD *method; 221 if (!(method = X509V3_EXT_get_nid(ext_nid))) { 222 X509V3err(X509V3_F_X509V3_EXT_I2D, X509V3_R_UNKNOWN_EXTENSION); 223 return NULL; 224 } 225 return do_ext_i2d(method, ext_nid, crit, ext_struc); 226} 227 228/* Check the extension string for critical flag */ 229static int v3_check_critical(char **value) 230{ 231 char *p = *value; 232 if ((strlen(p) < 9) || strncmp(p, "critical,", 9)) 233 return 0; 234 p += 9; 235 while (isspace((unsigned char)*p)) 236 p++; 237 *value = p; 238 return 1; 239} 240 241/* Check extension string for generic extension and return the type */ 242static int v3_check_generic(char **value) 243{ 244 int gen_type = 0; 245 char *p = *value; 246 if ((strlen(p) >= 4) && !strncmp(p, "DER:", 4)) { 247 p += 4; 248 gen_type = 1; 249 } else if ((strlen(p) >= 5) && !strncmp(p, "ASN1:", 5)) { 250 p += 5; 251 gen_type = 2; 252 } else 253 return 0; 254 255 while (isspace((unsigned char)*p)) 256 p++; 257 *value = p; 258 return gen_type; 259} 260 261/* Create a generic extension: for now just handle DER type */ 262static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, 263 int crit, int gen_type, 264 X509V3_CTX *ctx) 265{ 266 unsigned char *ext_der = NULL; 267 long ext_len; 268 ASN1_OBJECT *obj = NULL; 269 ASN1_OCTET_STRING *oct = NULL; 270 X509_EXTENSION *extension = NULL; 271 if (!(obj = OBJ_txt2obj(ext, 0))) { 272 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, 273 X509V3_R_EXTENSION_NAME_ERROR); 274 ERR_add_error_data(2, "name=", ext); 275 goto err; 276 } 277 278 if (gen_type == 1) 279 ext_der = string_to_hex(value, &ext_len); 280 else if (gen_type == 2) 281 ext_der = generic_asn1(value, ctx, &ext_len); 282 283 if (ext_der == NULL) { 284 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, 285 X509V3_R_EXTENSION_VALUE_ERROR); 286 ERR_add_error_data(2, "value=", value); 287 goto err; 288 } 289 290 if (!(oct = M_ASN1_OCTET_STRING_new())) { 291 X509V3err(X509V3_F_V3_GENERIC_EXTENSION, ERR_R_MALLOC_FAILURE); 292 goto err; 293 } 294 295 oct->data = ext_der; 296 oct->length = ext_len; 297 ext_der = NULL; 298 299 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct); 300 301 err: 302 ASN1_OBJECT_free(obj); 303 M_ASN1_OCTET_STRING_free(oct); 304 if (ext_der) 305 OPENSSL_free(ext_der); 306 return extension; 307 308} 309 310static unsigned char *generic_asn1(char *value, X509V3_CTX *ctx, 311 long *ext_len) 312{ 313 ASN1_TYPE *typ; 314 unsigned char *ext_der = NULL; 315 typ = ASN1_generate_v3(value, ctx); 316 if (typ == NULL) 317 return NULL; 318 *ext_len = i2d_ASN1_TYPE(typ, &ext_der); 319 ASN1_TYPE_free(typ); 320 return ext_der; 321} 322 323/* 324 * This is the main function: add a bunch of extensions based on a config 325 * file section to an extension STACK. 326 */ 327 328int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, char *section, 329 STACK_OF(X509_EXTENSION) **sk) 330{ 331 X509_EXTENSION *ext; 332 STACK_OF(CONF_VALUE) *nval; 333 CONF_VALUE *val; 334 int i; 335 if (!(nval = NCONF_get_section(conf, section))) 336 return 0; 337 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { 338 val = sk_CONF_VALUE_value(nval, i); 339 if (!(ext = X509V3_EXT_nconf(conf, ctx, val->name, val->value))) 340 return 0; 341 if (sk) 342 X509v3_add_ext(sk, ext, -1); 343 X509_EXTENSION_free(ext); 344 } 345 return 1; 346} 347 348/* 349 * Convenience functions to add extensions to a certificate, CRL and request 350 */ 351 352int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 353 X509 *cert) 354{ 355 STACK_OF(X509_EXTENSION) **sk = NULL; 356 if (cert) 357 sk = &cert->cert_info->extensions; 358 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 359} 360 361/* Same as above but for a CRL */ 362 363int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 364 X509_CRL *crl) 365{ 366 STACK_OF(X509_EXTENSION) **sk = NULL; 367 if (crl) 368 sk = &crl->crl->extensions; 369 return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 370} 371 372/* Add extensions to certificate request */ 373 374int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, char *section, 375 X509_REQ *req) 376{ 377 STACK_OF(X509_EXTENSION) *extlist = NULL, **sk = NULL; 378 int i; 379 if (req) 380 sk = &extlist; 381 i = X509V3_EXT_add_nconf_sk(conf, ctx, section, sk); 382 if (!i || !sk) 383 return i; 384 i = X509_REQ_add_extensions(req, extlist); 385 sk_X509_EXTENSION_pop_free(extlist, X509_EXTENSION_free); 386 return i; 387} 388 389/* Config database functions */ 390 391char *X509V3_get_string(X509V3_CTX *ctx, char *name, char *section) 392{ 393 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) { 394 X509V3err(X509V3_F_X509V3_GET_STRING, X509V3_R_OPERATION_NOT_DEFINED); 395 return NULL; 396 } 397 if (ctx->db_meth->get_string) 398 return ctx->db_meth->get_string(ctx->db, name, section); 399 return NULL; 400} 401 402STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, char *section) 403{ 404 if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) { 405 X509V3err(X509V3_F_X509V3_GET_SECTION, 406 X509V3_R_OPERATION_NOT_DEFINED); 407 return NULL; 408 } 409 if (ctx->db_meth->get_section) 410 return ctx->db_meth->get_section(ctx->db, section); 411 return NULL; 412} 413 414void X509V3_string_free(X509V3_CTX *ctx, char *str) 415{ 416 if (!str) 417 return; 418 if (ctx->db_meth->free_string) 419 ctx->db_meth->free_string(ctx->db, str); 420} 421 422void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section) 423{ 424 if (!section) 425 return; 426 if (ctx->db_meth->free_section) 427 ctx->db_meth->free_section(ctx->db, section); 428} 429 430static char *nconf_get_string(void *db, char *section, char *value) 431{ 432 return NCONF_get_string(db, section, value); 433} 434 435static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section) 436{ 437 return NCONF_get_section(db, section); 438} 439 440static X509V3_CONF_METHOD nconf_method = { 441 nconf_get_string, 442 nconf_get_section, 443 NULL, 444 NULL 445}; 446 447void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf) 448{ 449 ctx->db_meth = &nconf_method; 450 ctx->db = conf; 451} 452 453void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req, 454 X509_CRL *crl, int flags) 455{ 456 ctx->issuer_cert = issuer; 457 ctx->subject_cert = subj; 458 ctx->crl = crl; 459 ctx->subject_req = req; 460 ctx->flags = flags; 461} 462 463/* Old conf compatibility functions */ 464 465X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 466 char *name, char *value) 467{ 468 CONF ctmp; 469 CONF_set_nconf(&ctmp, conf); 470 return X509V3_EXT_nconf(&ctmp, ctx, name, value); 471} 472 473/* LHASH *conf: Config file */ 474/* char *value: Value */ 475X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf, 476 X509V3_CTX *ctx, int ext_nid, char *value) 477{ 478 CONF ctmp; 479 CONF_set_nconf(&ctmp, conf); 480 return X509V3_EXT_nconf_nid(&ctmp, ctx, ext_nid, value); 481} 482 483static char *conf_lhash_get_string(void *db, char *section, char *value) 484{ 485 return CONF_get_string(db, section, value); 486} 487 488static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section) 489{ 490 return CONF_get_section(db, section); 491} 492 493static X509V3_CONF_METHOD conf_lhash_method = { 494 conf_lhash_get_string, 495 conf_lhash_get_section, 496 NULL, 497 NULL 498}; 499 500void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash) 501{ 502 ctx->db_meth = &conf_lhash_method; 503 ctx->db = lhash; 504} 505 506int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 507 char *section, X509 *cert) 508{ 509 CONF ctmp; 510 CONF_set_nconf(&ctmp, conf); 511 return X509V3_EXT_add_nconf(&ctmp, ctx, section, cert); 512} 513 514/* Same as above but for a CRL */ 515 516int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 517 char *section, X509_CRL *crl) 518{ 519 CONF ctmp; 520 CONF_set_nconf(&ctmp, conf); 521 return X509V3_EXT_CRL_add_nconf(&ctmp, ctx, section, crl); 522} 523 524/* Add extensions to certificate request */ 525 526int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx, 527 char *section, X509_REQ *req) 528{ 529 CONF ctmp; 530 CONF_set_nconf(&ctmp, conf); 531 return X509V3_EXT_REQ_add_nconf(&ctmp, ctx, section, req); 532} 533