apps/ocsp.c

   1 /* ocsp.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2000.
   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 #ifndef OPENSSL_NO_OCSP
  59
  60 #include <stdio.h>
  61 #include <string.h>
  62 #include "apps.h"
  63 #include <openssl/pem.h>
  64 #include <openssl/ocsp.h>
  65 #include <openssl/err.h>
  66 #include <openssl/ssl.h>
  67
  68 /* Maximum leeway in validity period: default 5 minutes */
  69 #define MAX_VALIDITY_PERIOD     (5 * 60)
  70
  71 /* CA index.txt definitions */
  72 #define DB_type         0
  73 #define DB_exp_date     1
  74 #define DB_rev_date     2
  75 #define DB_serial       3       /* index - unique */
  76 #define DB_file         4
  77 #define DB_name         5       /* index - unique for active */
  78 #define DB_NUMBER       6
  79
  80 #define DB_TYPE_REV     'R'
  81 #define DB_TYPE_EXP     'E'
  82 #define DB_TYPE_VAL     'V'
  83
  84 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert, X509 *issuer,
  85                                 STACK_OF(OCSP_CERTID) *ids);
  86 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial, X509 *issuer,
  87                                 STACK_OF(OCSP_CERTID) *ids);
  88 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  89                                 STACK *names, STACK_OF(OCSP_CERTID) *ids,
  90                                 long nsec, long maxage);
  91
  92 static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req, TXT_DB *db,
  93                         X509 *ca, X509 *rcert, EVP_PKEY *rkey,
  94                         STACK_OF(X509) *rother, unsigned long flags,
  95                         int nmin, int ndays);
  96
  97 static char **lookup_serial(TXT_DB *db, ASN1_INTEGER *ser);
  98 static BIO *init_responder(char *port);
  99 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, char *port);
 100 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 101
 102 #undef PROG
 103 #define PROG ocsp_main
 104
 105 int MAIN(int, char **);
 106
 107 int MAIN(int argc, char **argv)
 108         {
 109         ENGINE *e = NULL;
 110         char **args;
 111         char *host = NULL, *port = NULL, *path = "/";
 112         char *reqin = NULL, *respin = NULL;
 113         char *reqout = NULL, *respout = NULL;
 114         char *signfile = NULL, *keyfile = NULL;
 115         char *rsignfile = NULL, *rkeyfile = NULL;
 116         char *outfile = NULL;
 117         int add_nonce = 1, noverify = 0, use_ssl = -1;
 118         OCSP_REQUEST *req = NULL;
 119         OCSP_RESPONSE *resp = NULL;
 120         OCSP_BASICRESP *bs = NULL;
 121         X509 *issuer = NULL, *cert = NULL;
 122         X509 *signer = NULL, *rsigner = NULL;
 123         EVP_PKEY *key = NULL, *rkey = NULL;
 124         BIO *acbio = NULL, *cbio = NULL;
 125         BIO *derbio = NULL;
 126         BIO *out = NULL;
 127         int req_text = 0, resp_text = 0;
 128         long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 129         char *CAfile = NULL, *CApath = NULL;
 130         X509_STORE *store = NULL;
 131         SSL_CTX *ctx = NULL;
 132         STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 133         char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 134         unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 135         int ret = 1;
 136         int accept_count = -1;
 137         int badarg = 0;
 138         int i;
 139         STACK *reqnames = NULL;
 140         STACK_OF(OCSP_CERTID) *ids = NULL;
 141
 142         X509 *rca_cert = NULL;
 143         char *ridx_filename = NULL;
 144         char *rca_filename = NULL;
 145         TXT_DB *rdb = NULL;
 146         int nmin = 0, ndays = -1;
 147
 148         if (bio_err == NULL) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
 149
 150         if (!load_config(bio_err, NULL))
 151                 goto end;
 152         SSL_load_error_strings();
 153         args = argv + 1;
 154         reqnames = sk_new_null();
 155         ids = sk_OCSP_CERTID_new_null();
 156         while (!badarg && *args && *args[0] == '-')
 157                 {
 158                 if (!strcmp(*args, "-out"))
 159                         {
 160                         if (args[1])
 161                                 {
 162                                 args++;
 163                                 outfile = *args;
 164                                 }
 165                         else badarg = 1;
 166                         }
 167                 else if (!strcmp(*args, "-url"))
 168                         {
 169                         if (args[1])
 170                                 {
 171                                 args++;
 172                                 if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl))
 173                                         {
 174                                         BIO_printf(bio_err, "Error parsing URL\n");
 175                                         badarg = 1;
 176                                         }
 177                                 }
 178                         else badarg = 1;
 179                         }
 180                 else if (!strcmp(*args, "-host"))
 181                         {
 182                         if (args[1])
 183                                 {
 184                                 args++;
 185                                 host = *args;
 186                                 }
 187                         else badarg = 1;
 188                         }
 189                 else if (!strcmp(*args, "-port"))
 190                         {
 191                         if (args[1])
 192                                 {
 193                                 args++;
 194                                 port = *args;
 195                                 }
 196                         else badarg = 1;
 197                         }
 198                 else if (!strcmp(*args, "-noverify"))
 199                         noverify = 1;
 200                 else if (!strcmp(*args, "-nonce"))
 201                         add_nonce = 2;
 202                 else if (!strcmp(*args, "-no_nonce"))
 203                         add_nonce = 0;
 204                 else if (!strcmp(*args, "-resp_no_certs"))
 205                         rflags |= OCSP_NOCERTS;
 206                 else if (!strcmp(*args, "-resp_key_id"))
 207                         rflags |= OCSP_RESPID_KEY;
 208                 else if (!strcmp(*args, "-no_certs"))
 209                         sign_flags |= OCSP_NOCERTS;
 210                 else if (!strcmp(*args, "-no_signature_verify"))
 211                         verify_flags |= OCSP_NOSIGS;
 212                 else if (!strcmp(*args, "-no_cert_verify"))
 213                         verify_flags |= OCSP_NOVERIFY;
 214                 else if (!strcmp(*args, "-no_chain"))
 215                         verify_flags |= OCSP_NOCHAIN;
 216                 else if (!strcmp(*args, "-no_cert_checks"))
 217                         verify_flags |= OCSP_NOCHECKS;
 218                 else if (!strcmp(*args, "-no_explicit"))
 219                         verify_flags |= OCSP_NOEXPLICIT;
 220                 else if (!strcmp(*args, "-trust_other"))
 221                         verify_flags |= OCSP_TRUSTOTHER;
 222                 else if (!strcmp(*args, "-no_intern"))
 223                         verify_flags |= OCSP_NOINTERN;
 224                 else if (!strcmp(*args, "-text"))
 225                         {
 226                         req_text = 1;
 227                         resp_text = 1;
 228                         }
 229                 else if (!strcmp(*args, "-req_text"))
 230                         req_text = 1;
 231                 else if (!strcmp(*args, "-resp_text"))
 232                         resp_text = 1;
 233                 else if (!strcmp(*args, "-reqin"))
 234                         {
 235                         if (args[1])
 236                                 {
 237                                 args++;
 238                                 reqin = *args;
 239                                 }
 240                         else badarg = 1;
 241                         }
 242                 else if (!strcmp(*args, "-respin"))
 243                         {
 244                         if (args[1])
 245                                 {
 246                                 args++;
 247                                 respin = *args;
 248                                 }
 249                         else badarg = 1;
 250                         }
 251                 else if (!strcmp(*args, "-signer"))
 252                         {
 253                         if (args[1])
 254                                 {
 255                                 args++;
 256                                 signfile = *args;
 257                                 }
 258                         else badarg = 1;
 259                         }
 260                 else if (!strcmp (*args, "-VAfile"))
 261                         {
 262                         if (args[1])
 263                                 {
 264                                 args++;
 265                                 verify_certfile = *args;
 266                                 verify_flags |= OCSP_TRUSTOTHER;
 267                                 }
 268                         else badarg = 1;
 269                         }
 270                 else if (!strcmp(*args, "-sign_other"))
 271                         {
 272                         if (args[1])
 273                                 {
 274                                 args++;
 275                                 sign_certfile = *args;
 276                                 }
 277                         else badarg = 1;
 278                         }
 279                 else if (!strcmp(*args, "-verify_other"))
 280                         {
 281                         if (args[1])
 282                                 {
 283                                 args++;
 284                                 verify_certfile = *args;
 285                                 }
 286                         else badarg = 1;
 287                         }
 288                 else if (!strcmp (*args, "-CAfile"))
 289                         {
 290                         if (args[1])
 291                                 {
 292                                 args++;
 293                                 CAfile = *args;
 294                                 }
 295                         else badarg = 1;
 296                         }
 297                 else if (!strcmp (*args, "-CApath"))
 298                         {
 299                         if (args[1])
 300                                 {
 301                                 args++;
 302                                 CApath = *args;
 303                                 }
 304                         else badarg = 1;
 305                         }
 306                 else if (!strcmp (*args, "-validity_period"))
 307                         {
 308                         if (args[1])
 309                                 {
 310                                 args++;
 311                                 nsec = atol(*args);
 312                                 if (nsec < 0)
 313                                         {
 314                                         BIO_printf(bio_err,
 315                                                 "Illegal validity period %s\n",
 316                                                 *args);
 317                                         badarg = 1;
 318                                         }
 319                                 }
 320                         else badarg = 1;
 321                         }
 322                 else if (!strcmp (*args, "-status_age"))
 323                         {
 324                         if (args[1])
 325                                 {
 326                                 args++;
 327                                 maxage = atol(*args);
 328                                 if (maxage < 0)
 329                                         {
 330                                         BIO_printf(bio_err,
 331                                                 "Illegal validity age %s\n",
 332                                                 *args);
 333                                         badarg = 1;
 334                                         }
 335                                 }
 336                         else badarg = 1;
 337                         }
 338                  else if (!strcmp(*args, "-signkey"))
 339                         {
 340                         if (args[1])
 341                                 {
 342                                 args++;
 343                                 keyfile = *args;
 344                                 }
 345                         else badarg = 1;
 346                         }
 347                 else if (!strcmp(*args, "-reqout"))
 348                         {
 349                         if (args[1])
 350                                 {
 351                                 args++;
 352                                 reqout = *args;
 353                                 }
 354                         else badarg = 1;
 355                         }
 356                 else if (!strcmp(*args, "-respout"))
 357                         {
 358                         if (args[1])
 359                                 {
 360                                 args++;
 361                                 respout = *args;
 362                                 }
 363                         else badarg = 1;
 364                         }
 365                  else if (!strcmp(*args, "-path"))
 366                         {
 367                         if (args[1])
 368                                 {
 369                                 args++;
 370                                 path = *args;
 371                                 }
 372                         else badarg = 1;
 373                         }
 374                 else if (!strcmp(*args, "-issuer"))
 375                         {
 376                         if (args[1])
 377                                 {
 378                                 args++;
 379                                 X509_free(issuer);
 380                                 issuer = load_cert(bio_err, *args, FORMAT_PEM,
 381                                         NULL, e, "issuer certificate");
 382                                 if(!issuer) goto end;
 383                                 }
 384                         else badarg = 1;
 385                         }
 386                 else if (!strcmp (*args, "-cert"))
 387                         {
 388                         if (args[1])
 389                                 {
 390                                 args++;
 391                                 X509_free(cert);
 392                                 cert = load_cert(bio_err, *args, FORMAT_PEM,
 393                                         NULL, e, "certificate");
 394                                 if(!cert) goto end;
 395                                 if(!add_ocsp_cert(&req, cert, issuer, ids))
 396                                         goto end;
 397                                 if(!sk_push(reqnames, *args))
 398                                         goto end;
 399                                 }
 400                         else badarg = 1;
 401                         }
 402                 else if (!strcmp(*args, "-serial"))
 403                         {
 404                         if (args[1])
 405                                 {
 406                                 args++;
 407                                 if(!add_ocsp_serial(&req, *args, issuer, ids))
 408                                         goto end;
 409                                 if(!sk_push(reqnames, *args))
 410                                         goto end;
 411                                 }
 412                         else badarg = 1;
 413                         }
 414                 else if (!strcmp(*args, "-index"))
 415                         {
 416                         if (args[1])
 417                                 {
 418                                 args++;
 419                                 ridx_filename = *args;
 420                                 }
 421                         else badarg = 1;
 422                         }
 423                 else if (!strcmp(*args, "-CA"))
 424                         {
 425                         if (args[1])
 426                                 {
 427                                 args++;
 428                                 rca_filename = *args;
 429                                 }
 430                         else badarg = 1;
 431                         }
 432                 else if (!strcmp (*args, "-nmin"))
 433                         {
 434                         if (args[1])
 435                                 {
 436                                 args++;
 437                                 nmin = atol(*args);
 438                                 if (nmin < 0)
 439                                         {
 440                                         BIO_printf(bio_err,
 441                                                 "Illegal update period %s\n",
 442                                                 *args);
 443                                         badarg = 1;
 444                                         }
 445                                 }
 446                                 if (ndays == -1)
 447                                         ndays = 0;
 448                         else badarg = 1;
 449                         }
 450                 else if (!strcmp (*args, "-nrequest"))
 451                         {
 452                         if (args[1])
 453                                 {
 454                                 args++;
 455                                 accept_count = atol(*args);
 456                                 if (accept_count < 0)
 457                                         {
 458                                         BIO_printf(bio_err,
 459                                                 "Illegal accept count %s\n",
 460                                                 *args);
 461                                         badarg = 1;
 462                                         }
 463                                 }
 464                         else badarg = 1;
 465                         }
 466                 else if (!strcmp (*args, "-ndays"))
 467                         {
 468                         if (args[1])
 469                                 {
 470                                 args++;
 471                                 ndays = atol(*args);
 472                                 if (ndays < 0)
 473                                         {
 474                                         BIO_printf(bio_err,
 475                                                 "Illegal update period %s\n",
 476                                                 *args);
 477                                         badarg = 1;
 478                                         }
 479                                 }
 480                         else badarg = 1;
 481                         }
 482                 else if (!strcmp(*args, "-rsigner"))
 483                         {
 484                         if (args[1])
 485                                 {
 486                                 args++;
 487                                 rsignfile = *args;
 488                                 }
 489                         else badarg = 1;
 490                         }
 491                 else if (!strcmp(*args, "-rkey"))
 492                         {
 493                         if (args[1])
 494                                 {
 495                                 args++;
 496                                 rkeyfile = *args;
 497                                 }
 498                         else badarg = 1;
 499                         }
 500                 else if (!strcmp(*args, "-rother"))
 501                         {
 502                         if (args[1])
 503                                 {
 504                                 args++;
 505                                 rcertfile = *args;
 506                                 }
 507                         else badarg = 1;
 508                         }
 509                 else badarg = 1;
 510                 args++;
 511                 }
 512
 513         /* Have we anything to do? */
 514         if (!req && !reqin && !respin && !(port && ridx_filename)) badarg = 1;
 515
 516         if (badarg)
 517                 {
 518                 BIO_printf (bio_err, "OCSP utility\n");
 519                 BIO_printf (bio_err, "Usage ocsp [options]\n");
 520                 BIO_printf (bio_err, "where options are\n");
 521                 BIO_printf (bio_err, "-out file          output filename\n");
 522                 BIO_printf (bio_err, "-issuer file       issuer certificate\n");
 523                 BIO_printf (bio_err, "-cert file         certificate to check\n");
 524                 BIO_printf (bio_err, "-serial n          serial number to check\n");
 525                 BIO_printf (bio_err, "-signer file       certificate to sign OCSP request with\n");
 526                 BIO_printf (bio_err, "-signkey file      private key to sign OCSP request with\n");
 527                 BIO_printf (bio_err, "-sign_certs file   additional certificates to include in signed request\n");
 528                 BIO_printf (bio_err, "-no_certs          don't include any certificates in signed request\n");
 529                 BIO_printf (bio_err, "-req_text          print text form of request\n");
 530                 BIO_printf (bio_err, "-resp_text         print text form of response\n");
 531                 BIO_printf (bio_err, "-text              print text form of request and response\n");
 532                 BIO_printf (bio_err, "-reqout file       write DER encoded OCSP request to \"file\"\n");
 533                 BIO_printf (bio_err, "-respout file      write DER encoded OCSP reponse to \"file\"\n");
 534                 BIO_printf (bio_err, "-reqin file        read DER encoded OCSP request from \"file\"\n");
 535                 BIO_printf (bio_err, "-respin file       read DER encoded OCSP reponse from \"file\"\n");
 536                 BIO_printf (bio_err, "-nonce             add OCSP nonce to request\n");
 537                 BIO_printf (bio_err, "-no_nonce          don't add OCSP nonce to request\n");
 538                 BIO_printf (bio_err, "-url URL           OCSP responder URL\n");
 539                 BIO_printf (bio_err, "-host host:n       send OCSP request to host on port n\n");
 540                 BIO_printf (bio_err, "-path              path to use in OCSP request\n");
 541                 BIO_printf (bio_err, "-CApath dir        trusted certificates directory\n");
 542                 BIO_printf (bio_err, "-CAfile file       trusted certificates file\n");
 543                 BIO_printf (bio_err, "-VAfile file       validator certificates file\n");
 544                 BIO_printf (bio_err, "-validity_period n maximum validity discrepancy in seconds\n");
 545                 BIO_printf (bio_err, "-status_age n      maximum status age in seconds\n");
 546                 BIO_printf (bio_err, "-noverify          don't verify response at all\n");
 547                 BIO_printf (bio_err, "-verify_certs file additional certificates to search for signer\n");
 548                 BIO_printf (bio_err, "-trust_other       don't verify additional certificates\n");
 549                 BIO_printf (bio_err, "-no_intern         don't search certificates contained in response for signer\n");
 550                 BIO_printf (bio_err, "-no_sig_verify     don't check signature on response\n");
 551                 BIO_printf (bio_err, "-no_cert_verify    don't check signing certificate\n");
 552                 BIO_printf (bio_err, "-no_chain          don't chain verify response\n");
 553                 BIO_printf (bio_err, "-no_cert_checks    don't do additional checks on signing certificate\n");
 554                 BIO_printf (bio_err, "-port num          port to run responder on\n");
 555                 BIO_printf (bio_err, "-index file        certificate status index file\n");
 556                 BIO_printf (bio_err, "-CA file           CA certificate\n");
 557                 BIO_printf (bio_err, "-rsigner file      responder certificate to sign responses with\n");
 558                 BIO_printf (bio_err, "-rkey file         responder key to sign responses with\n");
 559                 BIO_printf (bio_err, "-rother file       other certificates to include in response\n");
 560                 BIO_printf (bio_err, "-resp_no_certs     don't include any certificates in response\n");
 561                 BIO_printf (bio_err, "-nmin n            number of minutes before next update\n");
 562                 BIO_printf (bio_err, "-ndays n           number of days before next update\n");
 563                 BIO_printf (bio_err, "-resp_key_id       identify reponse by signing certificate key ID\n");
 564                 BIO_printf (bio_err, "-nrequest n        number of requests to accept (default unlimited)\n");
 565                 goto end;
 566                 }
 567
 568         if(outfile) out = BIO_new_file(outfile, "w");
 569         else out = BIO_new_fp(stdout, BIO_NOCLOSE);
 570
 571         if(!out)
 572                 {
 573                 BIO_printf(bio_err, "Error opening output file\n");
 574                 goto end;
 575                 }
 576
 577         if (!req && (add_nonce != 2)) add_nonce = 0;
 578
 579         if (!req && reqin)
 580                 {
 581                 derbio = BIO_new_file(reqin, "rb");
 582                 if (!derbio)
 583                         {
 584                         BIO_printf(bio_err, "Error Opening OCSP request file\n");
 585                         goto end;
 586                         }
 587                 req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 588                 BIO_free(derbio);
 589                 if(!req)
 590                         {
 591                         BIO_printf(bio_err, "Error reading OCSP request\n");
 592                         goto end;
 593                         }
 594                 }
 595
 596         if (!req && port)
 597                 {
 598                 acbio = init_responder(port);
 599                 if (!acbio)
 600                         goto end;
 601                 }
 602
 603         if (rsignfile && !rdb)
 604                 {
 605                 if (!rkeyfile) rkeyfile = rsignfile;
 606                 rsigner = load_cert(bio_err, rsignfile, FORMAT_PEM,
 607                         NULL, e, "responder certificate");
 608                 if (!rsigner)
 609                         {
 610                         BIO_printf(bio_err, "Error loading responder certificate\n");
 611                         goto end;
 612                         }
 613                 rca_cert = load_cert(bio_err, rca_filename, FORMAT_PEM,
 614                         NULL, e, "CA certificate");
 615                 if (rcertfile)
 616                         {
 617                         rother = load_certs(bio_err, rcertfile, FORMAT_PEM,
 618                                 NULL, e, "responder other certificates");
 619                         if (!rother) goto end;
 620                         }
 621                 rkey = load_key(bio_err, rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 622                         "responder private key");
 623                 if (!rkey)
 624                         goto end;
 625                 }
 626         if(acbio)
 627                 BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
 628
 629         redo_accept:
 630
 631         if (acbio)
 632                 {
 633                 if (!do_responder(&req, &cbio, acbio, port))
 634                         goto end;
 635                 if (!req)
 636                         {
 637                         resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
 638                         send_ocsp_response(cbio, resp);
 639                         goto done_resp;
 640                         }
 641                 }
 642
 643         if (!req && (signfile || reqout || host || add_nonce || ridx_filename))
 644                 {
 645                 BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 646                 goto end;
 647                 }
 648
 649         if (req && add_nonce) OCSP_request_add1_nonce(req, NULL, -1);
 650
 651         if (signfile)
 652                 {
 653                 if (!keyfile) keyfile = signfile;
 654                 signer = load_cert(bio_err, signfile, FORMAT_PEM,
 655                         NULL, e, "signer certificate");
 656                 if (!signer)
 657                         {
 658                         BIO_printf(bio_err, "Error loading signer certificate\n");
 659                         goto end;
 660                         }
 661                 if (sign_certfile)
 662                         {
 663                         sign_other = load_certs(bio_err, sign_certfile, FORMAT_PEM,
 664                                 NULL, e, "signer certificates");
 665                         if (!sign_other) goto end;
 666                         }
 667                 key = load_key(bio_err, keyfile, FORMAT_PEM, 0, NULL, NULL,
 668                         "signer private key");
 669                 if (!key)
 670                         goto end;
 671                 if (!OCSP_request_sign(req, signer, key, EVP_sha1(), sign_other, sign_flags))
 672                         {
 673                         BIO_printf(bio_err, "Error signing OCSP request\n");
 674                         goto end;
 675                         }
 676                 }
 677
 678         if (req_text && req) OCSP_REQUEST_print(out, req, 0);
 679
 680         if (reqout)
 681                 {
 682                 derbio = BIO_new_file(reqout, "wb");
 683                 if(!derbio)
 684                         {
 685                         BIO_printf(bio_err, "Error opening file %s\n", reqout);
 686                         goto end;
 687                         }
 688                 i2d_OCSP_REQUEST_bio(derbio, req);
 689                 BIO_free(derbio);
 690                 }
 691
 692         if (ridx_filename && (!rkey || !rsigner || !rca_cert))
 693                 {
 694                 BIO_printf(bio_err, "Need a responder certificate, key and CA for this operation!\n");
 695                 goto end;
 696                 }
 697
 698         if (ridx_filename && !rdb)
 699                 {
 700                 BIO *db_bio = NULL;
 701                 db_bio = BIO_new_file(ridx_filename, "r");
 702                 if (!db_bio)
 703                         {
 704                         BIO_printf(bio_err, "Error opening index file %s\n", ridx_filename);
 705                         goto end;
 706                         }
 707                 rdb = TXT_DB_read(db_bio, DB_NUMBER);
 708                 BIO_free(db_bio);
 709                 if (!rdb)
 710                         {
 711                         BIO_printf(bio_err, "Error reading index file %s\n", ridx_filename);
 712                         goto end;
 713                         }
 714                 if (!make_serial_index(rdb))
 715                         goto end;
 716                 }
 717
 718         if (rdb)
 719                 {
 720                 i = make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey, rother, rflags, nmin, ndays);
 721                 if (cbio)
 722                         send_ocsp_response(cbio, resp);
 723                 }
 724         else if (host)
 725                 {
 726 #ifndef OPENSSL_NO_SOCK
 727                 cbio = BIO_new_connect(host);
 728 #else
 729                 BIO_printf(bio_err, "Error creating connect BIO - sockets not supported.\n");
 730                 goto end;
 731 #endif
 732                 if (!cbio)
 733                         {
 734                         BIO_printf(bio_err, "Error creating connect BIO\n");
 735                         goto end;
 736                         }
 737                 if (port) BIO_set_conn_port(cbio, port);
 738                 if (use_ssl == 1)
 739                         {
 740                         BIO *sbio;
 741 #if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
 742                         ctx = SSL_CTX_new(SSLv23_client_method());
 743 #elif !defined(OPENSSL_NO_SSL3)
 744                         ctx = SSL_CTX_new(SSLv3_client_method());
 745 #elif !defined(OPENSSL_NO_SSL2)
 746                         ctx = SSL_CTX_new(SSLv2_client_method());
 747 #else
 748                         BIO_printf(bio_err, "SSL is disabled\n");
 749                         goto end;
 750 #endif
 751                         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
 752                         sbio = BIO_new_ssl(ctx, 1);
 753                         cbio = BIO_push(sbio, cbio);
 754                         }
 755                 if (BIO_do_connect(cbio) <= 0)
 756                         {
 757                         BIO_printf(bio_err, "Error connecting BIO\n");
 758                         goto end;
 759                         }
 760                 resp = OCSP_sendreq_bio(cbio, path, req);
 761                 BIO_free_all(cbio);
 762                 cbio = NULL;
 763                 if (!resp)
 764                         {
 765                         BIO_printf(bio_err, "Error querying OCSP responsder\n");
 766                         goto end;
 767                         }
 768                 }
 769         else if (respin)
 770                 {
 771                 derbio = BIO_new_file(respin, "rb");
 772                 if (!derbio)
 773                         {
 774                         BIO_printf(bio_err, "Error Opening OCSP response file\n");
 775                         goto end;
 776                         }
 777                 resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 778                 BIO_free(derbio);
 779                 if(!resp)
 780                         {
 781                         BIO_printf(bio_err, "Error reading OCSP response\n");
 782                         goto end;
 783                         }
 784
 785                 }
 786         else
 787                 {
 788                 ret = 0;
 789                 goto end;
 790                 }
 791
 792         done_resp:
 793
 794         if (respout)
 795                 {
 796                 derbio = BIO_new_file(respout, "wb");
 797                 if(!derbio)
 798                         {
 799                         BIO_printf(bio_err, "Error opening file %s\n", respout);
 800                         goto end;
 801                         }
 802                 i2d_OCSP_RESPONSE_bio(derbio, resp);
 803                 BIO_free(derbio);
 804                 }
 805
 806         i = OCSP_response_status(resp);
 807
 808         if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL)
 809                 {
 810                 BIO_printf(out, "Responder Error: %s (%ld)\n",
 811                                 OCSP_response_status_str(i), i);
 812                 ret = 0;
 813                 goto end;
 814                 }
 815
 816         if (resp_text) OCSP_RESPONSE_print(out, resp, 0);
 817
 818         /* If running as responder don't verify our own response */
 819         if (cbio)
 820                 {
 821                 if (accept_count > 0)
 822                         accept_count--;
 823                 /* Redo if more connections needed */
 824                 if (accept_count)
 825                         {
 826                         BIO_free_all(cbio);
 827                         cbio = NULL;
 828                         OCSP_REQUEST_free(req);
 829                         req = NULL;
 830                         OCSP_RESPONSE_free(resp);
 831                         resp = NULL;
 832                         goto redo_accept;
 833                         }
 834                 goto end;
 835                 }
 836
 837         if (!store)
 838                 store = setup_verify(bio_err, CAfile, CApath);
 839         if (!store)
 840                 goto end;
 841         if (verify_certfile)
 842                 {
 843                 verify_other = load_certs(bio_err, verify_certfile, FORMAT_PEM,
 844                         NULL, e, "validator certificate");
 845                 if (!verify_other) goto end;
 846                 }
 847
 848         bs = OCSP_response_get1_basic(resp);
 849
 850         if (!bs)
 851                 {
 852                 BIO_printf(bio_err, "Error parsing response\n");
 853                 goto end;
 854                 }
 855
 856         if (!noverify)
 857                 {
 858                 if (req && ((i = OCSP_check_nonce(req, bs)) <= 0))
 859                         {
 860                         if (i == -1)
 861                                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 862                         else
 863                                 {
 864                                 BIO_printf(bio_err, "Nonce Verify error\n");
 865                                 goto end;
 866                                 }
 867                         }
 868
 869                 i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 870                 if (i < 0) i = OCSP_basic_verify(bs, NULL, store, 0);
 871
 872                 if(i <= 0)
 873                         {
 874                         BIO_printf(bio_err, "Response Verify Failure\n", i);
 875                         ERR_print_errors(bio_err);
 876                         }
 877                 else
 878                         BIO_printf(bio_err, "Response verify OK\n");
 879
 880                 }
 881
 882         if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
 883                 goto end;
 884
 885         ret = 0;
 886
 887 end:
 888         ERR_print_errors(bio_err);
 889         X509_free(signer);
 890         X509_STORE_free(store);
 891         EVP_PKEY_free(key);
 892         EVP_PKEY_free(rkey);
 893         X509_free(issuer);
 894         X509_free(cert);
 895         X509_free(rsigner);
 896         X509_free(rca_cert);
 897         TXT_DB_free(rdb);
 898         BIO_free_all(cbio);
 899         BIO_free_all(acbio);
 900         BIO_free(out);
 901         OCSP_REQUEST_free(req);
 902         OCSP_RESPONSE_free(resp);
 903         OCSP_BASICRESP_free(bs);
 904         sk_free(reqnames);
 905         sk_OCSP_CERTID_free(ids);
 906         sk_X509_pop_free(sign_other, X509_free);
 907         sk_X509_pop_free(verify_other, X509_free);
 908
 909         if (use_ssl != -1)
 910                 {
 911                 OPENSSL_free(host);
 912                 OPENSSL_free(port);
 913                 OPENSSL_free(path);
 914                 SSL_CTX_free(ctx);
 915                 }
 916
 917         OPENSSL_EXIT(ret);
 918 }
 919
 920 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert, X509 *issuer,
 921                                 STACK_OF(OCSP_CERTID) *ids)
 922         {
 923         OCSP_CERTID *id;
 924         if(!issuer)
 925                 {
 926                 BIO_printf(bio_err, "No issuer certificate specified\n");
 927                 return 0;
 928                 }
 929         if(!*req) *req = OCSP_REQUEST_new();
 930         if(!*req) goto err;
 931         id = OCSP_cert_to_id(NULL, cert, issuer);
 932         if(!id || !sk_OCSP_CERTID_push(ids, id)) goto err;
 933         if(!OCSP_request_add0_id(*req, id)) goto err;
 934         return 1;
 935
 936         err:
 937         BIO_printf(bio_err, "Error Creating OCSP request\n");
 938         return 0;
 939         }
 940
 941 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial, X509 *issuer,
 942                                 STACK_OF(OCSP_CERTID) *ids)
 943         {
 944         OCSP_CERTID *id;
 945         X509_NAME *iname;
 946         ASN1_BIT_STRING *ikey;
 947         ASN1_INTEGER *sno;
 948         if(!issuer)
 949                 {
 950                 BIO_printf(bio_err, "No issuer certificate specified\n");
 951                 return 0;
 952                 }
 953         if(!*req) *req = OCSP_REQUEST_new();
 954         if(!*req) goto err;
 955         iname = X509_get_subject_name(issuer);
 956         ikey = X509_get0_pubkey_bitstr(issuer);
 957         sno = s2i_ASN1_INTEGER(NULL, serial);
 958         if(!sno)
 959                 {
 960                 BIO_printf(bio_err, "Error converting serial number %s\n", serial);
 961                 return 0;
 962                 }
 963         id = OCSP_cert_id_new(EVP_sha1(), iname, ikey, sno);
 964         ASN1_INTEGER_free(sno);
 965         if(!id || !sk_OCSP_CERTID_push(ids, id)) goto err;
 966         if(!OCSP_request_add0_id(*req, id)) goto err;
 967         return 1;
 968
 969         err:
 970         BIO_printf(bio_err, "Error Creating OCSP request\n");
 971         return 0;
 972         }
 973
 974 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
 975                                         STACK *names, STACK_OF(OCSP_CERTID) *ids,
 976                                         long nsec, long maxage)
 977         {
 978         OCSP_CERTID *id;
 979         char *name;
 980         int i;
 981
 982         int status, reason;
 983
 984         ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 985
 986         if (!bs || !req || !sk_num(names) || !sk_OCSP_CERTID_num(ids))
 987                 return 1;
 988
 989         for (i = 0; i < sk_OCSP_CERTID_num(ids); i++)
 990                 {
 991                 id = sk_OCSP_CERTID_value(ids, i);
 992                 name = sk_value(names, i);
 993                 BIO_printf(out, "%s: ", name);
 994
 995                 if(!OCSP_resp_find_status(bs, id, &status, &reason,
 996                                         &rev, &thisupd, &nextupd))
 997                         {
 998                         BIO_puts(out, "ERROR: No Status found.\n");
 999                         continue;
1000                         }
1001
1002                 /* Check validity: if invalid write to output BIO so we
1003                  * know which response this refers to.
1004                  */
1005                 if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage))
1006                         {
1007                         BIO_puts(out, "WARNING: Status times invalid.\n");
1008                         ERR_print_errors(out);
1009                         }
1010                 BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1011
1012                 BIO_puts(out, "\tThis Update: ");
1013                 ASN1_GENERALIZEDTIME_print(out, thisupd);
1014                 BIO_puts(out, "\n");
1015
1016                 if(nextupd)
1017                         {
1018                         BIO_puts(out, "\tNext Update: ");
1019                         ASN1_GENERALIZEDTIME_print(out, nextupd);
1020                         BIO_puts(out, "\n");
1021                         }
1022
1023                 if (status != V_OCSP_CERTSTATUS_REVOKED)
1024                         continue;
1025
1026                 if (reason != -1)
1027                         BIO_printf(out, "\tReason: %s\n",
1028                                 OCSP_crl_reason_str(reason));
1029
1030                 BIO_puts(out, "\tRevocation Time: ");
1031                 ASN1_GENERALIZEDTIME_print(out, rev);
1032                 BIO_puts(out, "\n");
1033                 }
1034
1035         return 1;
1036         }
1037
1038
1039 static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req, TXT_DB *db,
1040                         X509 *ca, X509 *rcert, EVP_PKEY *rkey,
1041                         STACK_OF(X509) *rother, unsigned long flags,
1042                         int nmin, int ndays)
1043         {
1044         ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1045         OCSP_CERTID *cid, *ca_id = NULL;
1046         OCSP_BASICRESP *bs = NULL;
1047         int i, id_count, ret = 1;
1048
1049
1050         id_count = OCSP_request_onereq_count(req);
1051
1052         if (id_count <= 0)
1053                 {
1054                 *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1055                 goto end;
1056                 }
1057
1058         ca_id = OCSP_cert_to_id(EVP_sha1(), NULL, ca);
1059
1060         bs = OCSP_BASICRESP_new();
1061         thisupd = X509_gmtime_adj(NULL, 0);
1062         if (ndays != -1)
1063                 nextupd = X509_gmtime_adj(NULL, nmin * 60 + ndays * 3600 * 24 );
1064
1065         /* Examine each certificate id in the request */
1066         for (i = 0; i < id_count; i++)
1067                 {
1068                 OCSP_ONEREQ *one;
1069                 ASN1_INTEGER *serial;
1070                 char **inf;
1071                 one = OCSP_request_onereq_get0(req, i);
1072                 cid = OCSP_onereq_get0_id(one);
1073                 /* Is this request about our CA? */
1074                 if (OCSP_id_issuer_cmp(ca_id, cid))
1075                         {
1076                         OCSP_basic_add1_status(bs, cid,
1077                                                 V_OCSP_CERTSTATUS_UNKNOWN,
1078                                                 0, NULL,
1079                                                 thisupd, nextupd);
1080                         continue;
1081                         }
1082                 OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1083                 inf = lookup_serial(db, serial);
1084                 if (!inf)
1085                         OCSP_basic_add1_status(bs, cid,
1086                                                 V_OCSP_CERTSTATUS_UNKNOWN,
1087                                                 0, NULL,
1088                                                 thisupd, nextupd);
1089                 else if (inf[DB_type][0] == DB_TYPE_VAL)
1090                         OCSP_basic_add1_status(bs, cid,
1091                                                 V_OCSP_CERTSTATUS_GOOD,
1092                                                 0, NULL,
1093                                                 thisupd, nextupd);
1094                 else if (inf[DB_type][0] == DB_TYPE_REV)
1095                         {
1096                         ASN1_OBJECT *inst = NULL;
1097                         ASN1_TIME *revtm = NULL;
1098                         ASN1_GENERALIZEDTIME *invtm = NULL;
1099                         OCSP_SINGLERESP *single;
1100                         int reason = -1;
1101                         unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1102                         single = OCSP_basic_add1_status(bs, cid,
1103                                                 V_OCSP_CERTSTATUS_REVOKED,
1104                                                 reason, revtm,
1105                                                 thisupd, nextupd);
1106                         if (invtm)
1107                                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date, invtm, 0, 0);
1108                         else if (inst)
1109                                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_hold_instruction_code, inst, 0, 0);
1110                         ASN1_OBJECT_free(inst);
1111                         ASN1_TIME_free(revtm);
1112                         ASN1_GENERALIZEDTIME_free(invtm);
1113                         }
1114                 }
1115
1116         OCSP_copy_nonce(bs, req);
1117
1118         OCSP_basic_sign(bs, rcert, rkey, EVP_sha1(), rother, flags);
1119
1120         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1121
1122         end:
1123         ASN1_TIME_free(thisupd);
1124         ASN1_TIME_free(nextupd);
1125         OCSP_CERTID_free(ca_id);
1126         OCSP_BASICRESP_free(bs);
1127         return ret;
1128
1129         }
1130
1131 static char **lookup_serial(TXT_DB *db, ASN1_INTEGER *ser)
1132         {
1133         int i;
1134         BIGNUM *bn = NULL;
1135         char *itmp, *row[DB_NUMBER],**rrow;
1136         for (i = 0; i < DB_NUMBER; i++) row[i] = NULL;
1137         bn = ASN1_INTEGER_to_BN(ser,NULL);
1138         if (BN_is_zero(bn))
1139                 itmp = BUF_strdup("00");
1140         else
1141                 itmp = BN_bn2hex(bn);
1142         row[DB_serial] = itmp;
1143         BN_free(bn);
1144         rrow=TXT_DB_get_by_index(db,DB_serial,row);
1145         OPENSSL_free(itmp);
1146         return rrow;
1147         }
1148
1149 /* Quick and dirty OCSP server: read in and parse input request */
1150
1151 static BIO *init_responder(char *port)
1152         {
1153         BIO *acbio = NULL, *bufbio = NULL;
1154         bufbio = BIO_new(BIO_f_buffer());
1155         if (!bufbio)
1156                 goto err;
1157 #ifndef OPENSSL_NO_SOCK
1158         acbio = BIO_new_accept(port);
1159 #else
1160         BIO_printf(bio_err, "Error setting up accept BIO - sockets not supported.\n");
1161 #endif
1162         if (!acbio)
1163                 goto err;
1164         BIO_set_accept_bios(acbio, bufbio);
1165         bufbio = NULL;
1166
1167         if (BIO_do_accept(acbio) <= 0)
1168                 {
1169                         BIO_printf(bio_err, "Error setting up accept BIO\n");
1170                         ERR_print_errors(bio_err);
1171                         goto err;
1172                 }
1173
1174         return acbio;
1175
1176         err:
1177         BIO_free_all(acbio);
1178         BIO_free(bufbio);
1179         return NULL;
1180         }
1181
1182 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, char *port)
1183         {
1184         int have_post = 0, len;
1185         OCSP_REQUEST *req = NULL;
1186         char inbuf[1024];
1187         BIO *cbio = NULL;
1188
1189         if (BIO_do_accept(acbio) <= 0)
1190                 {
1191                         BIO_printf(bio_err, "Error accepting connection\n");
1192                         ERR_print_errors(bio_err);
1193                         return 0;
1194                 }
1195
1196         cbio = BIO_pop(acbio);
1197         *pcbio = cbio;
1198
1199         for(;;)
1200                 {
1201                 len = BIO_gets(cbio, inbuf, sizeof inbuf);
1202                 if (len <= 0)
1203                         return 1;
1204                 /* Look for "POST" signalling start of query */
1205                 if (!have_post)
1206                         {
1207                         if(strncmp(inbuf, "POST", 4))
1208                                 {
1209                                 BIO_printf(bio_err, "Invalid request\n");
1210                                 return 1;
1211                                 }
1212                         have_post = 1;
1213                         }
1214                 /* Look for end of headers */
1215                 if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1216                         break;
1217                 }
1218
1219         /* Try to read OCSP request */
1220
1221         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1222
1223         if (!req)
1224                 {
1225                 BIO_printf(bio_err, "Error parsing OCSP request\n");
1226                 ERR_print_errors(bio_err);
1227                 }
1228
1229         *preq = req;
1230
1231         return 1;
1232
1233         }
1234
1235 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1236         {
1237         char http_resp[] =
1238                 "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1239                 "Content-Length: %d\r\n\r\n";
1240         if (!cbio)
1241                 return 0;
1242         BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1243         i2d_OCSP_RESPONSE_bio(cbio, resp);
1244         BIO_flush(cbio);
1245         return 1;
1246         }
1247
1248 #endif