release/src/router/openssl/apps/ocsp.c

   1 /* ocsp.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59 #ifndef OPENSSL_NO_OCSP
  60
  61 # ifdef OPENSSL_SYS_VMS
  62 #  define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
  63                                  * on OpenVMS */
  64 # endif
  65
  66 # define USE_SOCKETS
  67
  68 # include <stdio.h>
  69 # include <stdlib.h>
  70 # include <string.h>
  71 # include <time.h>
  72 # include "apps.h"              /* needs to be included before the openssl
  73                                  * headers! */
  74 # include <openssl/e_os2.h>
  75 # include <openssl/crypto.h>
  76 # include <openssl/err.h>
  77 # include <openssl/ssl.h>
  78 # include <openssl/evp.h>
  79 # include <openssl/bn.h>
  80 # include <openssl/x509v3.h>
  81
  82 # if defined(NETWARE_CLIB)
  83 #  ifdef NETWARE_BSDSOCK
  84 #   include <sys/socket.h>
  85 #   include <sys/bsdskt.h>
  86 #  else
  87 #   include <novsock2.h>
  88 #  endif
  89 # elif defined(NETWARE_LIBC)
  90 #  ifdef NETWARE_BSDSOCK
  91 #   include <sys/select.h>
  92 #  else
  93 #   include <novsock2.h>
  94 #  endif
  95 # endif
  96
  97 /* Maximum leeway in validity period: default 5 minutes */
  98 # define MAX_VALIDITY_PERIOD     (5 * 60)
  99
 100 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
 101                          const EVP_MD *cert_id_md, X509 *issuer,
 102                          STACK_OF(OCSP_CERTID) *ids);
 103 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
 104                            const EVP_MD *cert_id_md, X509 *issuer,
 105                            STACK_OF(OCSP_CERTID) *ids);
 106 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
 107                               STACK_OF(OPENSSL_STRING) *names,
 108                               STACK_OF(OCSP_CERTID) *ids, long nsec,
 109                               long maxage);
 110
 111 static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
 112                               CA_DB *db, X509 *ca, X509 *rcert,
 113                               EVP_PKEY *rkey, const EVP_MD *md,
 114                               STACK_OF(X509) *rother, unsigned long flags,
 115                               int nmin, int ndays, int badsig);
 116
 117 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 118 static BIO *init_responder(const char *port);
 119 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
 120                         const char *port);
 121 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 122 static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
 123                                       const STACK_OF(CONF_VALUE) *headers,
 124                                       OCSP_REQUEST *req, int req_timeout);
 125
 126 # undef PROG
 127 # define PROG ocsp_main
 128
 129 int MAIN(int, char **);
 130
 131 int MAIN(int argc, char **argv)
 132 {
 133     ENGINE *e = NULL;
 134     char **args;
 135     char *host = NULL, *port = NULL, *path = "/";
 136     char *thost = NULL, *tport = NULL, *tpath = NULL;
 137     char *reqin = NULL, *respin = NULL;
 138     char *reqout = NULL, *respout = NULL;
 139     char *signfile = NULL, *keyfile = NULL;
 140     char *rsignfile = NULL, *rkeyfile = NULL;
 141     char *outfile = NULL;
 142     int add_nonce = 1, noverify = 0, use_ssl = -1;
 143     STACK_OF(CONF_VALUE) *headers = NULL;
 144     OCSP_REQUEST *req = NULL;
 145     OCSP_RESPONSE *resp = NULL;
 146     OCSP_BASICRESP *bs = NULL;
 147     X509 *issuer = NULL, *cert = NULL;
 148     X509 *signer = NULL, *rsigner = NULL;
 149     EVP_PKEY *key = NULL, *rkey = NULL;
 150     BIO *acbio = NULL, *cbio = NULL;
 151     BIO *derbio = NULL;
 152     BIO *out = NULL;
 153     int req_timeout = -1;
 154     int req_text = 0, resp_text = 0;
 155     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 156     char *CAfile = NULL, *CApath = NULL;
 157     X509_STORE *store = NULL;
 158     X509_VERIFY_PARAM *vpm = NULL;
 159     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 160     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 161     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 162     int ret = 1;
 163     int accept_count = -1;
 164     int badarg = 0;
 165     int badsig = 0;
 166     int i;
 167     int ignore_err = 0;
 168     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 169     STACK_OF(OCSP_CERTID) *ids = NULL;
 170
 171     X509 *rca_cert = NULL;
 172     char *ridx_filename = NULL;
 173     char *rca_filename = NULL;
 174     CA_DB *rdb = NULL;
 175     int nmin = 0, ndays = -1;
 176     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 177
 178     if (bio_err == NULL)
 179         bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
 180
 181     if (!load_config(bio_err, NULL))
 182         goto end;
 183     SSL_load_error_strings();
 184     OpenSSL_add_ssl_algorithms();
 185     args = argv + 1;
 186     reqnames = sk_OPENSSL_STRING_new_null();
 187     ids = sk_OCSP_CERTID_new_null();
 188     while (!badarg && *args && *args[0] == '-') {
 189         if (!strcmp(*args, "-out")) {
 190             if (args[1]) {
 191                 args++;
 192                 outfile = *args;
 193             } else
 194                 badarg = 1;
 195         } else if (!strcmp(*args, "-timeout")) {
 196             if (args[1]) {
 197                 args++;
 198                 req_timeout = atol(*args);
 199                 if (req_timeout < 0) {
 200                     BIO_printf(bio_err, "Illegal timeout value %s\n", *args);
 201                     badarg = 1;
 202                 }
 203             } else
 204                 badarg = 1;
 205         } else if (!strcmp(*args, "-url")) {
 206             if (thost)
 207                 OPENSSL_free(thost);
 208             if (tport)
 209                 OPENSSL_free(tport);
 210             if (tpath)
 211                 OPENSSL_free(tpath);
 212             if (args[1]) {
 213                 args++;
 214                 if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl)) {
 215                     BIO_printf(bio_err, "Error parsing URL\n");
 216                     badarg = 1;
 217                 }
 218                 thost = host;
 219                 tport = port;
 220                 tpath = path;
 221             } else
 222                 badarg = 1;
 223         } else if (!strcmp(*args, "-host")) {
 224             if (args[1]) {
 225                 args++;
 226                 host = *args;
 227             } else
 228                 badarg = 1;
 229         } else if (!strcmp(*args, "-port")) {
 230             if (args[1]) {
 231                 args++;
 232                 port = *args;
 233             } else
 234                 badarg = 1;
 235         } else if (!strcmp(*args, "-header")) {
 236             if (args[1] && args[2]) {
 237                 if (!X509V3_add_value(args[1], args[2], &headers))
 238                     goto end;
 239                 args += 2;
 240             } else
 241                 badarg = 1;
 242         } else if (!strcmp(*args, "-ignore_err"))
 243             ignore_err = 1;
 244         else if (!strcmp(*args, "-noverify"))
 245             noverify = 1;
 246         else if (!strcmp(*args, "-nonce"))
 247             add_nonce = 2;
 248         else if (!strcmp(*args, "-no_nonce"))
 249             add_nonce = 0;
 250         else if (!strcmp(*args, "-resp_no_certs"))
 251             rflags |= OCSP_NOCERTS;
 252         else if (!strcmp(*args, "-resp_key_id"))
 253             rflags |= OCSP_RESPID_KEY;
 254         else if (!strcmp(*args, "-no_certs"))
 255             sign_flags |= OCSP_NOCERTS;
 256         else if (!strcmp(*args, "-no_signature_verify"))
 257             verify_flags |= OCSP_NOSIGS;
 258         else if (!strcmp(*args, "-no_cert_verify"))
 259             verify_flags |= OCSP_NOVERIFY;
 260         else if (!strcmp(*args, "-no_chain"))
 261             verify_flags |= OCSP_NOCHAIN;
 262         else if (!strcmp(*args, "-no_cert_checks"))
 263             verify_flags |= OCSP_NOCHECKS;
 264         else if (!strcmp(*args, "-no_explicit"))
 265             verify_flags |= OCSP_NOEXPLICIT;
 266         else if (!strcmp(*args, "-trust_other"))
 267             verify_flags |= OCSP_TRUSTOTHER;
 268         else if (!strcmp(*args, "-no_intern"))
 269             verify_flags |= OCSP_NOINTERN;
 270         else if (!strcmp(*args, "-badsig"))
 271             badsig = 1;
 272         else if (!strcmp(*args, "-text")) {
 273             req_text = 1;
 274             resp_text = 1;
 275         } else if (!strcmp(*args, "-req_text"))
 276             req_text = 1;
 277         else if (!strcmp(*args, "-resp_text"))
 278             resp_text = 1;
 279         else if (!strcmp(*args, "-reqin")) {
 280             if (args[1]) {
 281                 args++;
 282                 reqin = *args;
 283             } else
 284                 badarg = 1;
 285         } else if (!strcmp(*args, "-respin")) {
 286             if (args[1]) {
 287                 args++;
 288                 respin = *args;
 289             } else
 290                 badarg = 1;
 291         } else if (!strcmp(*args, "-signer")) {
 292             if (args[1]) {
 293                 args++;
 294                 signfile = *args;
 295             } else
 296                 badarg = 1;
 297         } else if (!strcmp(*args, "-VAfile")) {
 298             if (args[1]) {
 299                 args++;
 300                 verify_certfile = *args;
 301                 verify_flags |= OCSP_TRUSTOTHER;
 302             } else
 303                 badarg = 1;
 304         } else if (!strcmp(*args, "-sign_other")) {
 305             if (args[1]) {
 306                 args++;
 307                 sign_certfile = *args;
 308             } else
 309                 badarg = 1;
 310         } else if (!strcmp(*args, "-verify_other")) {
 311             if (args[1]) {
 312                 args++;
 313                 verify_certfile = *args;
 314             } else
 315                 badarg = 1;
 316         } else if (!strcmp(*args, "-CAfile")) {
 317             if (args[1]) {
 318                 args++;
 319                 CAfile = *args;
 320             } else
 321                 badarg = 1;
 322         } else if (!strcmp(*args, "-CApath")) {
 323             if (args[1]) {
 324                 args++;
 325                 CApath = *args;
 326             } else
 327                 badarg = 1;
 328         } else if (args_verify(&args, NULL, &badarg, bio_err, &vpm)) {
 329             if (badarg)
 330                 goto end;
 331             continue;
 332         } else if (!strcmp(*args, "-validity_period")) {
 333             if (args[1]) {
 334                 args++;
 335                 nsec = atol(*args);
 336                 if (nsec < 0) {
 337                     BIO_printf(bio_err,
 338                                "Illegal validity period %s\n", *args);
 339                     badarg = 1;
 340                 }
 341             } else
 342                 badarg = 1;
 343         } else if (!strcmp(*args, "-status_age")) {
 344             if (args[1]) {
 345                 args++;
 346                 maxage = atol(*args);
 347                 if (maxage < 0) {
 348                     BIO_printf(bio_err, "Illegal validity age %s\n", *args);
 349                     badarg = 1;
 350                 }
 351             } else
 352                 badarg = 1;
 353         } else if (!strcmp(*args, "-signkey")) {
 354             if (args[1]) {
 355                 args++;
 356                 keyfile = *args;
 357             } else
 358                 badarg = 1;
 359         } else if (!strcmp(*args, "-reqout")) {
 360             if (args[1]) {
 361                 args++;
 362                 reqout = *args;
 363             } else
 364                 badarg = 1;
 365         } else if (!strcmp(*args, "-respout")) {
 366             if (args[1]) {
 367                 args++;
 368                 respout = *args;
 369             } else
 370                 badarg = 1;
 371         } else if (!strcmp(*args, "-path")) {
 372             if (args[1]) {
 373                 args++;
 374                 path = *args;
 375             } else
 376                 badarg = 1;
 377         } else if (!strcmp(*args, "-issuer")) {
 378             if (args[1]) {
 379                 args++;
 380                 X509_free(issuer);
 381                 issuer = load_cert(bio_err, *args, FORMAT_PEM,
 382                                    NULL, e, "issuer certificate");
 383                 if (!issuer)
 384                     goto end;
 385             } else
 386                 badarg = 1;
 387         } else if (!strcmp(*args, "-cert")) {
 388             if (args[1]) {
 389                 args++;
 390                 X509_free(cert);
 391                 cert = load_cert(bio_err, *args, FORMAT_PEM,
 392                                  NULL, e, "certificate");
 393                 if (!cert)
 394                     goto end;
 395                 if (!cert_id_md)
 396                     cert_id_md = EVP_sha1();
 397                 if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 398                     goto end;
 399                 if (!sk_OPENSSL_STRING_push(reqnames, *args))
 400                     goto end;
 401             } else
 402                 badarg = 1;
 403         } else if (!strcmp(*args, "-serial")) {
 404             if (args[1]) {
 405                 args++;
 406                 if (!cert_id_md)
 407                     cert_id_md = EVP_sha1();
 408                 if (!add_ocsp_serial(&req, *args, cert_id_md, issuer, ids))
 409                     goto end;
 410                 if (!sk_OPENSSL_STRING_push(reqnames, *args))
 411                     goto end;
 412             } else
 413                 badarg = 1;
 414         } else if (!strcmp(*args, "-index")) {
 415             if (args[1]) {
 416                 args++;
 417                 ridx_filename = *args;
 418             } else
 419                 badarg = 1;
 420         } else if (!strcmp(*args, "-CA")) {
 421             if (args[1]) {
 422                 args++;
 423                 rca_filename = *args;
 424             } else
 425                 badarg = 1;
 426         } else if (!strcmp(*args, "-nmin")) {
 427             if (args[1]) {
 428                 args++;
 429                 nmin = atol(*args);
 430                 if (nmin < 0) {
 431                     BIO_printf(bio_err, "Illegal update period %s\n", *args);
 432                     badarg = 1;
 433                 }
 434             }
 435             if (ndays == -1)
 436                 ndays = 0;
 437             else
 438                 badarg = 1;
 439         } else if (!strcmp(*args, "-nrequest")) {
 440             if (args[1]) {
 441                 args++;
 442                 accept_count = atol(*args);
 443                 if (accept_count < 0) {
 444                     BIO_printf(bio_err, "Illegal accept count %s\n", *args);
 445                     badarg = 1;
 446                 }
 447             } else
 448                 badarg = 1;
 449         } else if (!strcmp(*args, "-ndays")) {
 450             if (args[1]) {
 451                 args++;
 452                 ndays = atol(*args);
 453                 if (ndays < 0) {
 454                     BIO_printf(bio_err, "Illegal update period %s\n", *args);
 455                     badarg = 1;
 456                 }
 457             } else
 458                 badarg = 1;
 459         } else if (!strcmp(*args, "-rsigner")) {
 460             if (args[1]) {
 461                 args++;
 462                 rsignfile = *args;
 463             } else
 464                 badarg = 1;
 465         } else if (!strcmp(*args, "-rkey")) {
 466             if (args[1]) {
 467                 args++;
 468                 rkeyfile = *args;
 469             } else
 470                 badarg = 1;
 471         } else if (!strcmp(*args, "-rother")) {
 472             if (args[1]) {
 473                 args++;
 474                 rcertfile = *args;
 475             } else
 476                 badarg = 1;
 477         } else if (!strcmp(*args, "-rmd")) {
 478             if (args[1]) {
 479                 args++;
 480                 rsign_md = EVP_get_digestbyname(*args);
 481                 if (!rsign_md)
 482                     badarg = 1;
 483             } else
 484                 badarg = 1;
 485         } else if ((cert_id_md = EVP_get_digestbyname((*args) + 1)) == NULL) {
 486             badarg = 1;
 487         }
 488         args++;
 489     }
 490
 491     /* Have we anything to do? */
 492     if (!req && !reqin && !respin && !(port && ridx_filename))
 493         badarg = 1;
 494
 495     if (badarg) {
 496         BIO_printf(bio_err, "OCSP utility\n");
 497         BIO_printf(bio_err, "Usage ocsp [options]\n");
 498         BIO_printf(bio_err, "where options are\n");
 499         BIO_printf(bio_err, "-out file            output filename\n");
 500         BIO_printf(bio_err, "-issuer file         issuer certificate\n");
 501         BIO_printf(bio_err, "-cert file           certificate to check\n");
 502         BIO_printf(bio_err, "-serial n            serial number to check\n");
 503         BIO_printf(bio_err,
 504                    "-signer file         certificate to sign OCSP request with\n");
 505         BIO_printf(bio_err,
 506                    "-signkey file        private key to sign OCSP request with\n");
 507         BIO_printf(bio_err,
 508                    "-sign_other file     additional certificates to include in signed request\n");
 509         BIO_printf(bio_err,
 510                    "-no_certs            don't include any certificates in signed request\n");
 511         BIO_printf(bio_err,
 512                    "-req_text            print text form of request\n");
 513         BIO_printf(bio_err,
 514                    "-resp_text           print text form of response\n");
 515         BIO_printf(bio_err,
 516                    "-text                print text form of request and response\n");
 517         BIO_printf(bio_err,
 518                    "-reqout file         write DER encoded OCSP request to \"file\"\n");
 519         BIO_printf(bio_err,
 520                    "-respout file        write DER encoded OCSP reponse to \"file\"\n");
 521         BIO_printf(bio_err,
 522                    "-reqin file          read DER encoded OCSP request from \"file\"\n");
 523         BIO_printf(bio_err,
 524                    "-respin file         read DER encoded OCSP reponse from \"file\"\n");
 525         BIO_printf(bio_err,
 526                    "-nonce               add OCSP nonce to request\n");
 527         BIO_printf(bio_err,
 528                    "-no_nonce            don't add OCSP nonce to request\n");
 529         BIO_printf(bio_err, "-url URL             OCSP responder URL\n");
 530         BIO_printf(bio_err,
 531                    "-host host:n         send OCSP request to host on port n\n");
 532         BIO_printf(bio_err,
 533                    "-path                path to use in OCSP request\n");
 534         BIO_printf(bio_err,
 535                    "-CApath dir          trusted certificates directory\n");
 536         BIO_printf(bio_err,
 537                    "-CAfile file         trusted certificates file\n");
 538         BIO_printf(bio_err,
 539                    "-no_alt_chains       only ever use the first certificate chain found\n");
 540         BIO_printf(bio_err,
 541                    "-VAfile file         validator certificates file\n");
 542         BIO_printf(bio_err,
 543                    "-validity_period n   maximum validity discrepancy in seconds\n");
 544         BIO_printf(bio_err,
 545                    "-status_age n        maximum status age in seconds\n");
 546         BIO_printf(bio_err,
 547                    "-noverify            don't verify response at all\n");
 548         BIO_printf(bio_err,
 549                    "-verify_other file   additional certificates to search for signer\n");
 550         BIO_printf(bio_err,
 551                    "-trust_other         don't verify additional certificates\n");
 552         BIO_printf(bio_err,
 553                    "-no_intern           don't search certificates contained in response for signer\n");
 554         BIO_printf(bio_err,
 555                    "-no_signature_verify don't check signature on response\n");
 556         BIO_printf(bio_err,
 557                    "-no_cert_verify      don't check signing certificate\n");
 558         BIO_printf(bio_err,
 559                    "-no_chain            don't chain verify response\n");
 560         BIO_printf(bio_err,
 561                    "-no_cert_checks      don't do additional checks on signing certificate\n");
 562         BIO_printf(bio_err,
 563                    "-port num            port to run responder on\n");
 564         BIO_printf(bio_err,
 565                    "-index file          certificate status index file\n");
 566         BIO_printf(bio_err, "-CA file             CA certificate\n");
 567         BIO_printf(bio_err,
 568                    "-rsigner file        responder certificate to sign responses with\n");
 569         BIO_printf(bio_err,
 570                    "-rkey file           responder key to sign responses with\n");
 571         BIO_printf(bio_err,
 572                    "-rother file         other certificates to include in response\n");
 573         BIO_printf(bio_err,
 574                    "-resp_no_certs       don't include any certificates in response\n");
 575         BIO_printf(bio_err,
 576                    "-nmin n              number of minutes before next update\n");
 577         BIO_printf(bio_err,
 578                    "-ndays n             number of days before next update\n");
 579         BIO_printf(bio_err,
 580                    "-resp_key_id         identify reponse by signing certificate key ID\n");
 581         BIO_printf(bio_err,
 582                    "-nrequest n          number of requests to accept (default unlimited)\n");
 583         BIO_printf(bio_err,
 584                    "-<dgst alg>          use specified digest in the request\n");
 585         BIO_printf(bio_err,
 586                    "-timeout n           timeout connection to OCSP responder after n seconds\n");
 587         goto end;
 588     }
 589
 590     if (outfile)
 591         out = BIO_new_file(outfile, "w");
 592     else
 593         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 594
 595     if (!out) {
 596         BIO_printf(bio_err, "Error opening output file\n");
 597         goto end;
 598     }
 599
 600     if (!req && (add_nonce != 2))
 601         add_nonce = 0;
 602
 603     if (!req && reqin) {
 604         if (!strcmp(reqin, "-"))
 605             derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
 606         else
 607             derbio = BIO_new_file(reqin, "rb");
 608         if (!derbio) {
 609             BIO_printf(bio_err, "Error Opening OCSP request file\n");
 610             goto end;
 611         }
 612         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 613         BIO_free(derbio);
 614         if (!req) {
 615             BIO_printf(bio_err, "Error reading OCSP request\n");
 616             goto end;
 617         }
 618     }
 619
 620     if (!req && port) {
 621         acbio = init_responder(port);
 622         if (!acbio)
 623             goto end;
 624     }
 625
 626     if (rsignfile && !rdb) {
 627         if (!rkeyfile)
 628             rkeyfile = rsignfile;
 629         rsigner = load_cert(bio_err, rsignfile, FORMAT_PEM,
 630                             NULL, e, "responder certificate");
 631         if (!rsigner) {
 632             BIO_printf(bio_err, "Error loading responder certificate\n");
 633             goto end;
 634         }
 635         rca_cert = load_cert(bio_err, rca_filename, FORMAT_PEM,
 636                              NULL, e, "CA certificate");
 637         if (rcertfile) {
 638             rother = load_certs(bio_err, rcertfile, FORMAT_PEM,
 639                                 NULL, e, "responder other certificates");
 640             if (!rother)
 641                 goto end;
 642         }
 643         rkey = load_key(bio_err, rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 644                         "responder private key");
 645         if (!rkey)
 646             goto end;
 647     }
 648     if (acbio)
 649         BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
 650
 651  redo_accept:
 652
 653     if (acbio) {
 654         if (!do_responder(&req, &cbio, acbio, port))
 655             goto end;
 656         if (!req) {
 657             resp =
 658                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 659                                      NULL);
 660             send_ocsp_response(cbio, resp);
 661             goto done_resp;
 662         }
 663     }
 664
 665     if (!req && (signfile || reqout || host || add_nonce || ridx_filename)) {
 666         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 667         goto end;
 668     }
 669
 670     if (req && add_nonce)
 671         OCSP_request_add1_nonce(req, NULL, -1);
 672
 673     if (signfile) {
 674         if (!keyfile)
 675             keyfile = signfile;
 676         signer = load_cert(bio_err, signfile, FORMAT_PEM,
 677                            NULL, e, "signer certificate");
 678         if (!signer) {
 679             BIO_printf(bio_err, "Error loading signer certificate\n");
 680             goto end;
 681         }
 682         if (sign_certfile) {
 683             sign_other = load_certs(bio_err, sign_certfile, FORMAT_PEM,
 684                                     NULL, e, "signer certificates");
 685             if (!sign_other)
 686                 goto end;
 687         }
 688         key = load_key(bio_err, keyfile, FORMAT_PEM, 0, NULL, NULL,
 689                        "signer private key");
 690         if (!key)
 691             goto end;
 692
 693         if (!OCSP_request_sign
 694             (req, signer, key, NULL, sign_other, sign_flags)) {
 695             BIO_printf(bio_err, "Error signing OCSP request\n");
 696             goto end;
 697         }
 698     }
 699
 700     if (req_text && req)
 701         OCSP_REQUEST_print(out, req, 0);
 702
 703     if (reqout) {
 704         if (!strcmp(reqout, "-"))
 705             derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
 706         else
 707             derbio = BIO_new_file(reqout, "wb");
 708         if (!derbio) {
 709             BIO_printf(bio_err, "Error opening file %s\n", reqout);
 710             goto end;
 711         }
 712         i2d_OCSP_REQUEST_bio(derbio, req);
 713         BIO_free(derbio);
 714     }
 715
 716     if (ridx_filename && (!rkey || !rsigner || !rca_cert)) {
 717         BIO_printf(bio_err,
 718                    "Need a responder certificate, key and CA for this operation!\n");
 719         goto end;
 720     }
 721
 722     if (ridx_filename && !rdb) {
 723         rdb = load_index(ridx_filename, NULL);
 724         if (!rdb)
 725             goto end;
 726         if (!index_index(rdb))
 727             goto end;
 728     }
 729
 730     if (rdb) {
 731         i = make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey,
 732                                rsign_md, rother, rflags, nmin, ndays, badsig);
 733         if (cbio)
 734             send_ocsp_response(cbio, resp);
 735     } else if (host) {
 736 # ifndef OPENSSL_NO_SOCK
 737         resp = process_responder(bio_err, req, host, path,
 738                                  port, use_ssl, headers, req_timeout);
 739         if (!resp)
 740             goto end;
 741 # else
 742         BIO_printf(bio_err,
 743                    "Error creating connect BIO - sockets not supported.\n");
 744         goto end;
 745 # endif
 746     } else if (respin) {
 747         if (!strcmp(respin, "-"))
 748             derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
 749         else
 750             derbio = BIO_new_file(respin, "rb");
 751         if (!derbio) {
 752             BIO_printf(bio_err, "Error Opening OCSP response file\n");
 753             goto end;
 754         }
 755         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 756         BIO_free(derbio);
 757         if (!resp) {
 758             BIO_printf(bio_err, "Error reading OCSP response\n");
 759             goto end;
 760         }
 761
 762     } else {
 763         ret = 0;
 764         goto end;
 765     }
 766
 767  done_resp:
 768
 769     if (respout) {
 770         if (!strcmp(respout, "-"))
 771             derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
 772         else
 773             derbio = BIO_new_file(respout, "wb");
 774         if (!derbio) {
 775             BIO_printf(bio_err, "Error opening file %s\n", respout);
 776             goto end;
 777         }
 778         i2d_OCSP_RESPONSE_bio(derbio, resp);
 779         BIO_free(derbio);
 780     }
 781
 782     i = OCSP_response_status(resp);
 783
 784     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 785         BIO_printf(out, "Responder Error: %s (%d)\n",
 786                    OCSP_response_status_str(i), i);
 787         if (ignore_err)
 788             goto redo_accept;
 789         ret = 0;
 790         goto end;
 791     }
 792
 793     if (resp_text)
 794         OCSP_RESPONSE_print(out, resp, 0);
 795
 796     /* If running as responder don't verify our own response */
 797     if (cbio) {
 798         if (accept_count > 0)
 799             accept_count--;
 800         /* Redo if more connections needed */
 801         if (accept_count) {
 802             BIO_free_all(cbio);
 803             cbio = NULL;
 804             OCSP_REQUEST_free(req);
 805             req = NULL;
 806             OCSP_RESPONSE_free(resp);
 807             resp = NULL;
 808             goto redo_accept;
 809         }
 810         ret = 0;
 811         goto end;
 812     } else if (ridx_filename) {
 813         ret = 0;
 814         goto end;
 815     }
 816
 817     if (!store)
 818         store = setup_verify(bio_err, CAfile, CApath);
 819     if (!store)
 820         goto end;
 821     if (vpm)
 822         X509_STORE_set1_param(store, vpm);
 823     if (verify_certfile) {
 824         verify_other = load_certs(bio_err, verify_certfile, FORMAT_PEM,
 825                                   NULL, e, "validator certificate");
 826         if (!verify_other)
 827             goto end;
 828     }
 829
 830     bs = OCSP_response_get1_basic(resp);
 831
 832     if (!bs) {
 833         BIO_printf(bio_err, "Error parsing response\n");
 834         goto end;
 835     }
 836
 837     ret = 0;
 838
 839     if (!noverify) {
 840         if (req && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 841             if (i == -1)
 842                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 843             else {
 844                 BIO_printf(bio_err, "Nonce Verify error\n");
 845                 ret = 1;
 846                 goto end;
 847             }
 848         }
 849
 850         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 851         if (i <= 0) {
 852             BIO_printf(bio_err, "Response Verify Failure\n");
 853             ERR_print_errors(bio_err);
 854             ret = 1;
 855         } else
 856             BIO_printf(bio_err, "Response verify OK\n");
 857
 858     }
 859
 860     if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
 861         ret = 1;
 862
 863  end:
 864     ERR_print_errors(bio_err);
 865     X509_free(signer);
 866     X509_STORE_free(store);
 867     if (vpm)
 868         X509_VERIFY_PARAM_free(vpm);
 869     EVP_PKEY_free(key);
 870     EVP_PKEY_free(rkey);
 871     X509_free(issuer);
 872     X509_free(cert);
 873     X509_free(rsigner);
 874     X509_free(rca_cert);
 875     free_index(rdb);
 876     BIO_free_all(cbio);
 877     BIO_free_all(acbio);
 878     BIO_free(out);
 879     OCSP_REQUEST_free(req);
 880     OCSP_RESPONSE_free(resp);
 881     OCSP_BASICRESP_free(bs);
 882     sk_OPENSSL_STRING_free(reqnames);
 883     sk_OCSP_CERTID_free(ids);
 884     sk_X509_pop_free(sign_other, X509_free);
 885     sk_X509_pop_free(verify_other, X509_free);
 886     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 887
 888     if (thost)
 889         OPENSSL_free(thost);
 890     if (tport)
 891         OPENSSL_free(tport);
 892     if (tpath)
 893         OPENSSL_free(tpath);
 894
 895     OPENSSL_EXIT(ret);
 896 }
 897
 898 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
 899                          const EVP_MD *cert_id_md, X509 *issuer,
 900                          STACK_OF(OCSP_CERTID) *ids)
 901 {
 902     OCSP_CERTID *id;
 903     if (!issuer) {
 904         BIO_printf(bio_err, "No issuer certificate specified\n");
 905         return 0;
 906     }
 907     if (!*req)
 908         *req = OCSP_REQUEST_new();
 909     if (!*req)
 910         goto err;
 911     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
 912     if (!id || !sk_OCSP_CERTID_push(ids, id))
 913         goto err;
 914     if (!OCSP_request_add0_id(*req, id))
 915         goto err;
 916     return 1;
 917
 918  err:
 919     BIO_printf(bio_err, "Error Creating OCSP request\n");
 920     return 0;
 921 }
 922
 923 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
 924                            const EVP_MD *cert_id_md, X509 *issuer,
 925                            STACK_OF(OCSP_CERTID) *ids)
 926 {
 927     OCSP_CERTID *id;
 928     X509_NAME *iname;
 929     ASN1_BIT_STRING *ikey;
 930     ASN1_INTEGER *sno;
 931     if (!issuer) {
 932         BIO_printf(bio_err, "No issuer certificate specified\n");
 933         return 0;
 934     }
 935     if (!*req)
 936         *req = OCSP_REQUEST_new();
 937     if (!*req)
 938         goto err;
 939     iname = X509_get_subject_name(issuer);
 940     ikey = X509_get0_pubkey_bitstr(issuer);
 941     sno = s2i_ASN1_INTEGER(NULL, serial);
 942     if (!sno) {
 943         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
 944         return 0;
 945     }
 946     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
 947     ASN1_INTEGER_free(sno);
 948     if (!id || !sk_OCSP_CERTID_push(ids, id))
 949         goto err;
 950     if (!OCSP_request_add0_id(*req, id))
 951         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_OF(OPENSSL_STRING) *names,
 961                               STACK_OF(OCSP_CERTID) *ids, long nsec,
 962                               long maxage)
 963 {
 964     OCSP_CERTID *id;
 965     char *name;
 966     int i;
 967
 968     int status, reason;
 969
 970     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 971
 972     if (!bs || !req || !sk_OPENSSL_STRING_num(names)
 973         || !sk_OCSP_CERTID_num(ids))
 974         return 1;
 975
 976     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
 977         id = sk_OCSP_CERTID_value(ids, i);
 978         name = sk_OPENSSL_STRING_value(names, i);
 979         BIO_printf(out, "%s: ", name);
 980
 981         if (!OCSP_resp_find_status(bs, id, &status, &reason,
 982                                    &rev, &thisupd, &nextupd)) {
 983             BIO_puts(out, "ERROR: No Status found.\n");
 984             continue;
 985         }
 986
 987         /*
 988          * Check validity: if invalid write to output BIO so we know which
 989          * response this refers to.
 990          */
 991         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
 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             BIO_puts(out, "\tNext Update: ");
1003             ASN1_GENERALIZEDTIME_print(out, nextupd);
1004             BIO_puts(out, "\n");
1005         }
1006
1007         if (status != V_OCSP_CERTSTATUS_REVOKED)
1008             continue;
1009
1010         if (reason != -1)
1011             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1012
1013         BIO_puts(out, "\tRevocation Time: ");
1014         ASN1_GENERALIZEDTIME_print(out, rev);
1015         BIO_puts(out, "\n");
1016     }
1017
1018     return 1;
1019 }
1020
1021 static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1022                               CA_DB *db, X509 *ca, X509 *rcert,
1023                               EVP_PKEY *rkey, const EVP_MD *rmd,
1024                               STACK_OF(X509) *rother, unsigned long flags,
1025                               int nmin, int ndays, int badsig)
1026 {
1027     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1028     OCSP_CERTID *cid, *ca_id = NULL;
1029     OCSP_BASICRESP *bs = NULL;
1030     int i, id_count, ret = 1;
1031
1032     id_count = OCSP_request_onereq_count(req);
1033
1034     if (id_count <= 0) {
1035         *resp =
1036             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1037         goto end;
1038     }
1039
1040     bs = OCSP_BASICRESP_new();
1041     thisupd = X509_gmtime_adj(NULL, 0);
1042     if (ndays != -1)
1043         nextupd = X509_gmtime_adj(NULL, nmin * 60 + ndays * 3600 * 24);
1044
1045     /* Examine each certificate id in the request */
1046     for (i = 0; i < id_count; i++) {
1047         OCSP_ONEREQ *one;
1048         ASN1_INTEGER *serial;
1049         char **inf;
1050         ASN1_OBJECT *cert_id_md_oid;
1051         const EVP_MD *cert_id_md;
1052         one = OCSP_request_onereq_get0(req, i);
1053         cid = OCSP_onereq_get0_id(one);
1054
1055         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1056
1057         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1058         if (!cert_id_md) {
1059             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1060                                          NULL);
1061             goto end;
1062         }
1063         if (ca_id)
1064             OCSP_CERTID_free(ca_id);
1065         ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
1066
1067         /* Is this request about our CA? */
1068         if (OCSP_id_issuer_cmp(ca_id, cid)) {
1069             OCSP_basic_add1_status(bs, cid,
1070                                    V_OCSP_CERTSTATUS_UNKNOWN,
1071                                    0, NULL, thisupd, nextupd);
1072             continue;
1073         }
1074         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1075         inf = lookup_serial(db, serial);
1076         if (!inf)
1077             OCSP_basic_add1_status(bs, cid,
1078                                    V_OCSP_CERTSTATUS_UNKNOWN,
1079                                    0, NULL, thisupd, nextupd);
1080         else if (inf[DB_type][0] == DB_TYPE_VAL)
1081             OCSP_basic_add1_status(bs, cid,
1082                                    V_OCSP_CERTSTATUS_GOOD,
1083                                    0, NULL, thisupd, nextupd);
1084         else if (inf[DB_type][0] == DB_TYPE_REV) {
1085             ASN1_OBJECT *inst = NULL;
1086             ASN1_TIME *revtm = NULL;
1087             ASN1_GENERALIZEDTIME *invtm = NULL;
1088             OCSP_SINGLERESP *single;
1089             int reason = -1;
1090             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1091             single = OCSP_basic_add1_status(bs, cid,
1092                                             V_OCSP_CERTSTATUS_REVOKED,
1093                                             reason, revtm, thisupd, nextupd);
1094             if (invtm)
1095                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1096                                              invtm, 0, 0);
1097             else if (inst)
1098                 OCSP_SINGLERESP_add1_ext_i2d(single,
1099                                              NID_hold_instruction_code, inst,
1100                                              0, 0);
1101             ASN1_OBJECT_free(inst);
1102             ASN1_TIME_free(revtm);
1103             ASN1_GENERALIZEDTIME_free(invtm);
1104         }
1105     }
1106
1107     OCSP_copy_nonce(bs, req);
1108
1109     OCSP_basic_sign(bs, rcert, rkey, rmd, rother, flags);
1110
1111     if (badsig)
1112         bs->signature->data[bs->signature->length - 1] ^= 0x1;
1113
1114     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1115
1116  end:
1117     ASN1_TIME_free(thisupd);
1118     ASN1_TIME_free(nextupd);
1119     OCSP_CERTID_free(ca_id);
1120     OCSP_BASICRESP_free(bs);
1121     return ret;
1122
1123 }
1124
1125 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1126 {
1127     int i;
1128     BIGNUM *bn = NULL;
1129     char *itmp, *row[DB_NUMBER], **rrow;
1130     for (i = 0; i < DB_NUMBER; i++)
1131         row[i] = NULL;
1132     bn = ASN1_INTEGER_to_BN(ser, NULL);
1133     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1134                                  * point and abort */
1135     if (BN_is_zero(bn))
1136         itmp = BUF_strdup("00");
1137     else
1138         itmp = BN_bn2hex(bn);
1139     row[DB_serial] = itmp;
1140     BN_free(bn);
1141     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1142     OPENSSL_free(itmp);
1143     return rrow;
1144 }
1145
1146 /* Quick and dirty OCSP server: read in and parse input request */
1147
1148 static BIO *init_responder(const char *port)
1149 {
1150     BIO *acbio = NULL, *bufbio = NULL;
1151     bufbio = BIO_new(BIO_f_buffer());
1152     if (!bufbio)
1153         goto err;
1154 # ifndef OPENSSL_NO_SOCK
1155     acbio = BIO_new_accept(port);
1156 # else
1157     BIO_printf(bio_err,
1158                "Error setting up accept BIO - sockets not supported.\n");
1159 # endif
1160     if (!acbio)
1161         goto err;
1162     BIO_set_accept_bios(acbio, bufbio);
1163     bufbio = NULL;
1164
1165     if (BIO_do_accept(acbio) <= 0) {
1166         BIO_printf(bio_err, "Error setting up accept BIO\n");
1167         ERR_print_errors(bio_err);
1168         goto err;
1169     }
1170
1171     return acbio;
1172
1173  err:
1174     BIO_free_all(acbio);
1175     BIO_free(bufbio);
1176     return NULL;
1177 }
1178
1179 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1180                         const char *port)
1181 {
1182     int have_post = 0, len;
1183     OCSP_REQUEST *req = NULL;
1184     char inbuf[1024];
1185     BIO *cbio = NULL;
1186
1187     if (BIO_do_accept(acbio) <= 0) {
1188         BIO_printf(bio_err, "Error accepting connection\n");
1189         ERR_print_errors(bio_err);
1190         return 0;
1191     }
1192
1193     cbio = BIO_pop(acbio);
1194     *pcbio = cbio;
1195
1196     for (;;) {
1197         len = BIO_gets(cbio, inbuf, sizeof inbuf);
1198         if (len <= 0)
1199             return 1;
1200         /* Look for "POST" signalling start of query */
1201         if (!have_post) {
1202             if (strncmp(inbuf, "POST", 4)) {
1203                 BIO_printf(bio_err, "Invalid request\n");
1204                 return 1;
1205             }
1206             have_post = 1;
1207         }
1208         /* Look for end of headers */
1209         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1210             break;
1211     }
1212
1213     /* Try to read OCSP request */
1214
1215     req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1216
1217     if (!req) {
1218         BIO_printf(bio_err, "Error parsing OCSP request\n");
1219         ERR_print_errors(bio_err);
1220     }
1221
1222     *preq = req;
1223
1224     return 1;
1225
1226 }
1227
1228 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1229 {
1230     char http_resp[] =
1231         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1232         "Content-Length: %d\r\n\r\n";
1233     if (!cbio)
1234         return 0;
1235     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1236     i2d_OCSP_RESPONSE_bio(cbio, resp);
1237     (void)BIO_flush(cbio);
1238     return 1;
1239 }
1240
1241 static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
1242                                       const STACK_OF(CONF_VALUE) *headers,
1243                                       OCSP_REQUEST *req, int req_timeout)
1244 {
1245     int fd;
1246     int rv;
1247     int i;
1248     OCSP_REQ_CTX *ctx = NULL;
1249     OCSP_RESPONSE *rsp = NULL;
1250     fd_set confds;
1251     struct timeval tv;
1252
1253     if (req_timeout != -1)
1254         BIO_set_nbio(cbio, 1);
1255
1256     rv = BIO_do_connect(cbio);
1257
1258     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1259         BIO_puts(err, "Error connecting BIO\n");
1260         return NULL;
1261     }
1262
1263     if (BIO_get_fd(cbio, &fd) <= 0) {
1264         BIO_puts(err, "Can't get connection fd\n");
1265         goto err;
1266     }
1267
1268     if (req_timeout != -1 && rv <= 0) {
1269         FD_ZERO(&confds);
1270         openssl_fdset(fd, &confds);
1271         tv.tv_usec = 0;
1272         tv.tv_sec = req_timeout;
1273         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1274         if (rv == 0) {
1275             BIO_puts(err, "Timeout on connect\n");
1276             return NULL;
1277         }
1278     }
1279
1280     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1281     if (!ctx)
1282         return NULL;
1283
1284     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1285         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1286         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1287             goto err;
1288     }
1289
1290     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1291         goto err;
1292
1293     for (;;) {
1294         rv = OCSP_sendreq_nbio(&rsp, ctx);
1295         if (rv != -1)
1296             break;
1297         if (req_timeout == -1)
1298             continue;
1299         FD_ZERO(&confds);
1300         openssl_fdset(fd, &confds);
1301         tv.tv_usec = 0;
1302         tv.tv_sec = req_timeout;
1303         if (BIO_should_read(cbio))
1304             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1305         else if (BIO_should_write(cbio))
1306             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1307         else {
1308             BIO_puts(err, "Unexpected retry condition\n");
1309             goto err;
1310         }
1311         if (rv == 0) {
1312             BIO_puts(err, "Timeout on request\n");
1313             break;
1314         }
1315         if (rv == -1) {
1316             BIO_puts(err, "Select error\n");
1317             break;
1318         }
1319
1320     }
1321  err:
1322     if (ctx)
1323         OCSP_REQ_CTX_free(ctx);
1324
1325     return rsp;
1326 }
1327
1328 OCSP_RESPONSE *process_responder(BIO *err, OCSP_REQUEST *req,
1329                                  const char *host, const char *path,
1330                                  const char *port, int use_ssl,
1331                                  const STACK_OF(CONF_VALUE) *headers,
1332                                  int req_timeout)
1333 {
1334     BIO *cbio = NULL;
1335     SSL_CTX *ctx = NULL;
1336     OCSP_RESPONSE *resp = NULL;
1337     cbio = BIO_new_connect(host);
1338     if (!cbio) {
1339         BIO_printf(err, "Error creating connect BIO\n");
1340         goto end;
1341     }
1342     if (port)
1343         BIO_set_conn_port(cbio, port);
1344     if (use_ssl == 1) {
1345         BIO *sbio;
1346         ctx = SSL_CTX_new(SSLv23_client_method());
1347         if (ctx == NULL) {
1348             BIO_printf(err, "Error creating SSL context.\n");
1349             goto end;
1350         }
1351         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1352         sbio = BIO_new_ssl(ctx, 1);
1353         cbio = BIO_push(sbio, cbio);
1354     }
1355     resp = query_responder(err, cbio, path, headers, req, req_timeout);
1356     if (!resp)
1357         BIO_printf(bio_err, "Error querying OCSP responder\n");
1358  end:
1359     if (cbio)
1360         BIO_free_all(cbio);
1361     if (ctx)
1362         SSL_CTX_free(ctx);
1363     return resp;
1364 }
1365
1366 #endif