v3_conf.c revision 55714
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_conf(LHASH *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/* LHASH *conf: Config file */ 78/* char *name: Name */ 79/* char *value: Value */ 80X509_EXTENSION *X509V3_EXT_conf(LHASH *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_conf(conf, ctx, OBJ_sn2nid(name), crit, value); 90 if(!ret) { 91 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_ERROR_IN_EXTENSION); 92 ERR_add_error_data(4,"name=", name, ", value=", value); 93 } 94 return ret; 95} 96 97/* LHASH *conf: Config file */ 98/* char *value: Value */ 99X509_EXTENSION *X509V3_EXT_conf_nid(LHASH *conf, X509V3_CTX *ctx, int ext_nid, 100 char *value) 101{ 102 int crit; 103 int ext_type; 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); 109} 110 111/* LHASH *conf: Config file */ 112/* char *value: Value */ 113static X509_EXTENSION *do_ext_conf(LHASH *conf, X509V3_CTX *ctx, int ext_nid, 114 int crit, char *value) 115{ 116 X509V3_EXT_METHOD *method; 117 X509_EXTENSION *ext; 118 STACK_OF(CONF_VALUE) *nval; 119 void *ext_struc; 120 if(ext_nid == NID_undef) { 121 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION_NAME); 122 return NULL; 123 } 124 if(!(method = X509V3_EXT_get_nid(ext_nid))) { 125 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION); 126 return NULL; 127 } 128 /* Now get internal extension representation based on type */ 129 if(method->v2i) { 130 if(*value == '@') nval = CONF_get_section(conf, value + 1); 131 else nval = X509V3_parse_list(value); 132 if(!nval) { 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); 135 return NULL; 136 } 137 ext_struc = method->v2i(method, ctx, nval); 138 if(*value != '@') sk_CONF_VALUE_pop_free(nval, 139 X509V3_conf_free); 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) { 144 if(!ctx->db) { 145 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_NO_CONFIG_DATABASE); 146 return NULL; 147 } 148 if(!(ext_struc = method->r2i(method, ctx, value))) return NULL; 149 } else { 150 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED); 151 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid)); 152 return NULL; 153 } 154 155 ext = do_ext_i2d(method, ext_nid, crit, ext_struc); 156 method->ext_free(ext_struc); 157 return ext; 158 159} 160 161static X509_EXTENSION *do_ext_i2d(X509V3_EXT_METHOD *method, int ext_nid, 162 int crit, void *ext_struc) 163{ 164 unsigned char *ext_der, *p; 165 int ext_len; 166 ASN1_OCTET_STRING *ext_oct; 167 X509_EXTENSION *ext; 168 /* Convert internal representation to DER */ 169 ext_len = method->i2d(ext_struc, NULL); 170 if(!(ext_der = Malloc(ext_len))) goto merr; 171 p = ext_der; 172 method->i2d(ext_struc, &p); 173 if(!(ext_oct = ASN1_OCTET_STRING_new())) goto merr; 174 ext_oct->data = ext_der; 175 ext_oct->length = ext_len; 176 177 ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct); 178 if(!ext) goto merr; 179 ASN1_OCTET_STRING_free(ext_oct); 180 181 return ext; 182 183 merr: 184 X509V3err(X509V3_F_DO_EXT_I2D,ERR_R_MALLOC_FAILURE); 185 return NULL; 186 187} 188 189/* Given an internal structure, nid and critical flag create an extension */ 190 191X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc) 192{ 193 X509V3_EXT_METHOD *method; 194 if(!(method = X509V3_EXT_get_nid(ext_nid))) { 195 X509V3err(X509V3_F_X509V3_EXT_I2D,X509V3_R_UNKNOWN_EXTENSION); 196 return NULL; 197 } 198 return do_ext_i2d(method, ext_nid, crit, ext_struc); 199} 200 201/* Check the extension string for critical flag */ 202static int v3_check_critical(char **value) 203{ 204 char *p = *value; 205 if((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0; 206 p+=9; 207 while(isspace((unsigned char)*p)) p++; 208 *value = p; 209 return 1; 210} 211 212/* Check extension string for generic extension and return the type */ 213static int v3_check_generic(char **value) 214{ 215 char *p = *value; 216 if((strlen(p) < 4) || strncmp(p, "DER:,", 4)) return 0; 217 p+=4; 218 while(isspace((unsigned char)*p)) p++; 219 *value = p; 220 return 1; 221} 222 223/* Create a generic extension: for now just handle RAW type */ 224static X509_EXTENSION *v3_generic_extension(const char *ext, char *value, 225 int crit, int type) 226{ 227unsigned char *ext_der=NULL; 228long ext_len; 229ASN1_OBJECT *obj=NULL; 230ASN1_OCTET_STRING *oct=NULL; 231X509_EXTENSION *extension=NULL; 232if(!(obj = OBJ_txt2obj(ext, 0))) { 233 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR); 234 ERR_add_error_data(2, "name=", ext); 235 goto err; 236} 237 238if(!(ext_der = string_to_hex(value, &ext_len))) { 239 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR); 240 ERR_add_error_data(2, "value=", value); 241 goto err; 242} 243 244if(!(oct = ASN1_OCTET_STRING_new())) { 245 X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE); 246 goto err; 247} 248 249oct->data = ext_der; 250oct->length = ext_len; 251ext_der = NULL; 252 253extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct); 254 255err: 256ASN1_OBJECT_free(obj); 257ASN1_OCTET_STRING_free(oct); 258if(ext_der) Free(ext_der); 259return extension; 260} 261 262 263/* This is the main function: add a bunch of extensions based on a config file 264 * section 265 */ 266 267int X509V3_EXT_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section, 268 X509 *cert) 269{ 270 X509_EXTENSION *ext; 271 STACK_OF(CONF_VALUE) *nval; 272 CONF_VALUE *val; 273 int i; 274 if(!(nval = CONF_get_section(conf, section))) return 0; 275 for(i = 0; i < sk_CONF_VALUE_num(nval); i++) { 276 val = sk_CONF_VALUE_value(nval, i); 277 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value))) 278 return 0; 279 if(cert) X509_add_ext(cert, ext, -1); 280 X509_EXTENSION_free(ext); 281 } 282 return 1; 283} 284 285/* Same as above but for a CRL */ 286 287int X509V3_EXT_CRL_add_conf(LHASH *conf, X509V3_CTX *ctx, char *section, 288 X509_CRL *crl) 289{ 290 X509_EXTENSION *ext; 291 STACK_OF(CONF_VALUE) *nval; 292 CONF_VALUE *val; 293 int i; 294 if(!(nval = CONF_get_section(conf, section))) return 0; 295 for(i = 0; i < sk_CONF_VALUE_num(nval); i++) { 296 val = sk_CONF_VALUE_value(nval, i); 297 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value))) 298 return 0; 299 if(crl) X509_CRL_add_ext(crl, ext, -1); 300 X509_EXTENSION_free(ext); 301 } 302 return 1; 303} 304 305/* Config database functions */ 306 307char * X509V3_get_string(X509V3_CTX *ctx, char *name, char *section) 308{ 309 if(ctx->db_meth->get_string) 310 return ctx->db_meth->get_string(ctx->db, name, section); 311 return NULL; 312} 313 314STACK_OF(CONF_VALUE) * X509V3_get_section(X509V3_CTX *ctx, char *section) 315{ 316 if(ctx->db_meth->get_section) 317 return ctx->db_meth->get_section(ctx->db, section); 318 return NULL; 319} 320 321void X509V3_string_free(X509V3_CTX *ctx, char *str) 322{ 323 if(!str) return; 324 if(ctx->db_meth->free_string) 325 ctx->db_meth->free_string(ctx->db, str); 326} 327 328void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section) 329{ 330 if(!section) return; 331 if(ctx->db_meth->free_section) 332 ctx->db_meth->free_section(ctx->db, section); 333} 334 335static char *conf_lhash_get_string(void *db, char *section, char *value) 336{ 337 return CONF_get_string(db, section, value); 338} 339 340static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section) 341{ 342 return CONF_get_section(db, section); 343} 344 345static X509V3_CONF_METHOD conf_lhash_method = { 346conf_lhash_get_string, 347conf_lhash_get_section, 348NULL, 349NULL 350}; 351 352void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH *lhash) 353{ 354 ctx->db_meth = &conf_lhash_method; 355 ctx->db = lhash; 356} 357 358void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req, 359 X509_CRL *crl, int flags) 360{ 361 ctx->issuer_cert = issuer; 362 ctx->subject_cert = subj; 363 ctx->crl = crl; 364 ctx->subject_req = req; 365 ctx->flags = flags; 366} 367