crypto/x509v3/v3_conf.c

   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 "conf.h"
  66 #include "x509.h"
  67 #include "x509v3.h"
  68
  69 #ifndef NOPROTO
  70 static int v3_check_critical(char **value);
  71 static int v3_check_generic(char **value);
  72 static X509_EXTENSION *do_ext_conf(LHASH *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value);
  73 static X509_EXTENSION *v3_generic_extension(char *ext, char *value, int crit, int type);
  74 #else
  75 static int v3_check_critical();
  76 static int v3_check_generic();
  77 static X509_EXTENSION *do_ext_conf();
  78 static X509V3_EXTENSION *v3_generic_extension();
  79 #endif
  80
  81 X509_EXTENSION *X509V3_EXT_conf(conf, ctx, name, value)
  82 LHASH *conf;    /* Config file */
  83 X509V3_CTX *ctx;
  84 char *name;     /* Name */
  85 char *value;    /* 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);
  93         ret = do_ext_conf(conf, ctx, OBJ_sn2nid(name), crit, value);
  94         if(!ret) {
  95                 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_ERROR_IN_EXTENSION);
  96                 ERR_add_error_data(4,"name=", name, ", value=", value);
  97         }
  98         return ret;
  99 }
 100
 101 X509_EXTENSION *X509V3_EXT_conf_nid(conf, ctx, ext_nid, value)
 102 LHASH *conf;    /* Config file */
 103 X509V3_CTX *ctx;
 104 int ext_nid;
 105 char *value;    /* Value */
 106 {
 107         int crit;
 108         int ext_type;
 109         crit = v3_check_critical(&value);
 110         if((ext_type = v3_check_generic(&value)))
 111                 return v3_generic_extension(OBJ_nid2sn(ext_nid),
 112                                                          value, crit, ext_type);
 113         return do_ext_conf(conf, ctx, ext_nid, crit, value);
 114 }
 115
 116 static X509_EXTENSION *do_ext_conf(conf, ctx, ext_nid, crit, value)
 117 LHASH *conf;    /* Config file */
 118 X509V3_CTX *ctx;
 119 int ext_nid;
 120 int crit;
 121 char *value;    /* Value */
 122 {
 123         X509_EXTENSION *ext = NULL;
 124         X509V3_EXT_METHOD *method;
 125         STACK *nval;
 126         char *ext_struc;
 127         char *ext_der, *p;
 128         int ext_len;
 129         ASN1_OCTET_STRING *ext_oct;
 130         if(ext_nid == NID_undef) {
 131                 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION_NAME);
 132                 return NULL;
 133         }
 134         if(!(method = X509V3_EXT_get_nid(ext_nid))) {
 135                 X509V3err(X509V3_F_DO_EXT_CONF,X509V3_R_UNKNOWN_EXTENSION);
 136                 return NULL;
 137         }
 138         /* Now get internal extension representation based on type */
 139         if(method->v2i) {
 140                 if(*value == '@') nval = CONF_get_section(conf, value + 1);
 141                 else nval = X509V3_parse_list(value);
 142                 if(!nval) {
 143                         X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_INVALID_EXTENSION_STRING);
 144                         ERR_add_error_data(4, "name=", OBJ_nid2sn(ext_nid), ",section=", value);
 145                         return NULL;
 146                 }
 147                 ext_struc = method->v2i(method, ctx, nval);
 148                 if(*value != '@') sk_pop_free(nval, X509V3_conf_free);
 149                 if(!ext_struc) return NULL;
 150         } else if(method->s2i) {
 151                 if(!(ext_struc = method->s2i(method, ctx, value))) return NULL;
 152         } else {
 153                 X509V3err(X509V3_F_X509V3_EXT_CONF,X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);
 154                 ERR_add_error_data(2, "name=", OBJ_nid2sn(ext_nid));
 155                 return NULL;
 156         }
 157
 158         /* We've now got the internal representation: convert to DER */
 159         ext_len = method->i2d(ext_struc, NULL);
 160         ext_der = Malloc(ext_len);
 161         p = ext_der;
 162         method->i2d(ext_struc, &p);
 163         method->ext_free(ext_struc);
 164         ext_oct = ASN1_OCTET_STRING_new();
 165         ext_oct->data = ext_der;
 166         ext_oct->length = ext_len;
 167
 168         ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
 169         ASN1_OCTET_STRING_free(ext_oct);
 170
 171         return ext;
 172
 173 }
 174
 175 /* Check the extension string for critical flag */
 176 static int v3_check_critical(value)
 177 char **value;
 178 {
 179         char *p = *value;
 180         if((strlen(p) < 9) || strncmp(p, "critical,", 9)) return 0;
 181         p+=9;
 182         while(isspace(*p)) p++;
 183         *value = p;
 184         return 1;
 185 }
 186
 187 /* Check extension string for generic extension and return the type */
 188 static int v3_check_generic(value)
 189 char **value;
 190 {
 191         char *p = *value;
 192         if((strlen(p) < 4) || strncmp(p, "RAW:,", 4)) return 0;
 193         p+=4;
 194         while(isspace(*p)) p++;
 195         *value = p;
 196         return 1;
 197 }
 198
 199 /* Create a generic extension: for now just handle RAW type */
 200 static X509_EXTENSION *v3_generic_extension(ext, value, crit, type)
 201 char *ext;
 202 char *value;
 203 int crit;
 204 int type;
 205 {
 206 unsigned char *ext_der=NULL;
 207 long ext_len;
 208 ASN1_OBJECT *obj=NULL;
 209 ASN1_OCTET_STRING *oct=NULL;
 210 X509_EXTENSION *extension=NULL;
 211 if(!(obj = OBJ_txt2obj(ext, 0))) {
 212         X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_NAME_ERROR);
 213         ERR_add_error_data(2, "name=", ext);
 214         goto err;
 215 }
 216
 217 if(!(ext_der = string_to_hex(value, &ext_len))) {
 218         X509V3err(X509V3_F_V3_GENERIC_EXTENSION,X509V3_R_EXTENSION_VALUE_ERROR);
 219         ERR_add_error_data(2, "value=", value);
 220         goto err;
 221 }
 222
 223 if(!(oct = ASN1_OCTET_STRING_new())) {
 224         X509V3err(X509V3_F_V3_GENERIC_EXTENSION,ERR_R_MALLOC_FAILURE);
 225         goto err;
 226 }
 227
 228 oct->data = ext_der;
 229 oct->length = ext_len;
 230 ext_der = NULL;
 231
 232 extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
 233
 234 err:
 235 ASN1_OBJECT_free(obj);
 236 ASN1_OCTET_STRING_free(oct);
 237 if(ext_der) Free(ext_der);
 238 return extension;
 239 }
 240
 241
 242 /* This is the main function: add a bunch of extensions based on a config file
 243  * section
 244  */
 245
 246 int X509V3_EXT_add_conf(conf, ctx, section, cert)
 247 LHASH *conf;
 248 X509V3_CTX *ctx;
 249 char *section;
 250 X509 *cert;
 251 {
 252         X509_EXTENSION *ext;
 253         STACK *nval;
 254         CONF_VALUE *val;
 255         int i;
 256         if(!(nval = CONF_get_section(conf, section))) return 0;
 257         for(i = 0; i < sk_num(nval); i++) {
 258                 val = (CONF_VALUE *)sk_value(nval, i);
 259                 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value)))
 260                                                                 return 0;
 261                 if(cert) X509_add_ext(cert, ext, -1);
 262                 X509_EXTENSION_free(ext);
 263         }
 264         return 1;
 265 }
 266
 267 /* Same as above but for a CRL */
 268
 269 int X509V3_EXT_CRL_add_conf(conf, ctx, section, crl)
 270 LHASH *conf;
 271 X509V3_CTX *ctx;
 272 char *section;
 273 X509_CRL *crl;
 274 {
 275         X509_EXTENSION *ext;
 276         STACK *nval;
 277         CONF_VALUE *val;
 278         int i;
 279         if(!(nval = CONF_get_section(conf, section))) return 0;
 280         for(i = 0; i < sk_num(nval); i++) {
 281                 val = (CONF_VALUE *)sk_value(nval, i);
 282                 if(!(ext = X509V3_EXT_conf(conf, ctx, val->name, val->value)))
 283                                                                 return 0;
 284                 if(crl) X509_CRL_add_ext(crl, ext, -1);
 285                 X509_EXTENSION_free(ext);
 286         }
 287         return 1;
 288 }
 289
 290 /* Just check syntax of config file as far as possible */
 291 int X509V3_EXT_check_conf(conf, section)
 292 LHASH *conf;
 293 char *section;
 294 {
 295         static X509V3_CTX ctx_tst = { CTX_TEST, NULL, NULL, NULL, NULL };
 296         return X509V3_EXT_add_conf(conf, &ctx_tst, section, NULL);
 297 }
 298
 299 /* Config database functions */
 300
 301 char * X509V3_get_string(ctx, name, section)
 302 X509V3_CTX *ctx;
 303 char *name;
 304 char *section;
 305 {
 306         if(ctx->db_meth->get_string)
 307                         return ctx->db_meth->get_string(ctx->db, name, section);
 308         return NULL;
 309 }
 310
 311 STACK * X509V3_get_section(ctx, section)
 312 X509V3_CTX *ctx;
 313 char *section;
 314 {
 315         if(ctx->db_meth->get_section)
 316                         return ctx->db_meth->get_section(ctx->db, section);
 317         return NULL;
 318 }
 319
 320 void X509V3_free_string(ctx, str)
 321 X509V3_CTX *ctx;
 322 char *str;
 323 {
 324         if(ctx->db_meth->free_string)
 325                         return ctx->db_meth->free_string(ctx->db, str);
 326 }
 327
 328 void X509V3_free_section(ctx, section)
 329 X509V3_CTX *ctx;
 330 STACK *section;
 331 {
 332         if(ctx->db_meth->free_section)
 333                         return ctx->db_meth->free_section(ctx->db, section);
 334 }
 335
 336 static char *conf_lhash_get_string(db, section, value)
 337 void *db;
 338 char *section;
 339 char *value;
 340 {
 341         return CONF_get_string(db, section, value);
 342 }
 343
 344 static STACK *conf_lhash_get_section(db, section)
 345 void *db;
 346 char *section;
 347 {
 348         return CONF_get_section(db, section);
 349 }
 350
 351 static X509V3_CONF_METHOD conf_lhash_method = {
 352 conf_lhash_get_string,
 353 conf_lhash_get_section,
 354 NULL,
 355 NULL
 356 };
 357
 358 void X509V3_set_conf_lhash(ctx, lhash)
 359 X509V3_CTX *ctx;
 360 LHASH *lhash;
 361 {
 362         ctx->db_meth = &conf_lhash_method;
 363         ctx->db = lhash;
 364 }
 365
 366 void X509V3_set_ctx(ctx, issuer, subj, req, crl, flags)
 367 X509V3_CTX *ctx;
 368 X509 *issuer;
 369 X509 *subj;
 370 X509_REQ *req;
 371 X509_CRL *crl;
 372 int flags;
 373 {
 374         ctx->issuer_cert = issuer;
 375         ctx->subject_cert = subj;
 376         ctx->crl = crl;
 377         ctx->subject_req = req;
 378         ctx->flags = flags;
 379 }