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