Cryptlib/OpenSSL/crypto/x509v3/v3_conf.c

   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
  68 static int v3_check_critical(char **value);
  69 static int v3_check_generic(char **value);
  70 static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
  71                                     int crit, char *value);
  72 static X509_EXTENSION *v3_generic_extension(const char *ext, char *value,
  73                                             int crit, int type,
  74                                             X509V3_CTX *ctx);
  75 static char *conf_lhash_get_string(void *db, char *section, char *value);
  76 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section);
  77 static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
  78                                   int ext_nid, int crit, void *ext_struc);
  79 static 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    */
  84 X509_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    */
 103 X509_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    */
 117 static 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
 176 static 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
 218 X509_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 */
 229 static 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 */
 242 static 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 */
 262 static 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
 310 static 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
 328 int 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
 352 int 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
 363 int 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
 374 int 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
 391 char *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
 402 STACK_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
 414 void 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
 422 void 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
 430 static char *nconf_get_string(void *db, char *section, char *value)
 431 {
 432     return NCONF_get_string(db, section, value);
 433 }
 434
 435 static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, char *section)
 436 {
 437     return NCONF_get_section(db, section);
 438 }
 439
 440 static X509V3_CONF_METHOD nconf_method = {
 441     nconf_get_string,
 442     nconf_get_section,
 443     NULL,
 444     NULL
 445 };
 446
 447 void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
 448 {
 449     ctx->db_meth = &nconf_method;
 450     ctx->db = conf;
 451 }
 452
 453 void 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
 465 X509_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    */
 475 X509_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
 483 static char *conf_lhash_get_string(void *db, char *section, char *value)
 484 {
 485     return CONF_get_string(db, section, value);
 486 }
 487
 488 static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, char *section)
 489 {
 490     return CONF_get_section(db, section);
 491 }
 492
 493 static X509V3_CONF_METHOD conf_lhash_method = {
 494     conf_lhash_get_string,
 495     conf_lhash_get_section,
 496     NULL,
 497     NULL
 498 };
 499
 500 void 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
 506 int 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
 516 int 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
 526 int 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 }