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             thost = tport = tpath = NULL;
 213             if (args[1]) {
 214                 args++;
 215                 if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl)) {
 216                     BIO_printf(bio_err, "Error parsing URL\n");
 217                     badarg = 1;
 218                 }
 219                 thost = host;
 220                 tport = port;
 221                 tpath = path;
 222             } else
 223                 badarg = 1;
 224         } else if (!strcmp(*args, "-host")) {
 225             if (args[1]) {
 226                 args++;
 227                 host = *args;
 228             } else
 229                 badarg = 1;
 230         } else if (!strcmp(*args, "-port")) {
 231             if (args[1]) {
 232                 args++;
 233                 port = *args;
 234             } else
 235                 badarg = 1;
 236         } else if (!strcmp(*args, "-header")) {
 237             if (args[1] && args[2]) {
 238                 if (!X509V3_add_value(args[1], args[2], &headers))
 239                     goto end;
 240                 args += 2;
 241             } else
 242                 badarg = 1;
 243         } else if (!strcmp(*args, "-ignore_err"))
 244             ignore_err = 1;
 245         else if (!strcmp(*args, "-noverify"))
 246             noverify = 1;
 247         else if (!strcmp(*args, "-nonce"))
 248             add_nonce = 2;
 249         else if (!strcmp(*args, "-no_nonce"))
 250             add_nonce = 0;
 251         else if (!strcmp(*args, "-resp_no_certs"))
 252             rflags |= OCSP_NOCERTS;
 253         else if (!strcmp(*args, "-resp_key_id"))
 254             rflags |= OCSP_RESPID_KEY;
 255         else if (!strcmp(*args, "-no_certs"))
 256             sign_flags |= OCSP_NOCERTS;
 257         else if (!strcmp(*args, "-no_signature_verify"))
 258             verify_flags |= OCSP_NOSIGS;
 259         else if (!strcmp(*args, "-no_cert_verify"))
 260             verify_flags |= OCSP_NOVERIFY;
 261         else if (!strcmp(*args, "-no_chain"))
 262             verify_flags |= OCSP_NOCHAIN;
 263         else if (!strcmp(*args, "-no_cert_checks"))
 264             verify_flags |= OCSP_NOCHECKS;
 265         else if (!strcmp(*args, "-no_explicit"))
 266             verify_flags |= OCSP_NOEXPLICIT;
 267         else if (!strcmp(*args, "-trust_other"))
 268             verify_flags |= OCSP_TRUSTOTHER;
 269         else if (!strcmp(*args, "-no_intern"))
 270             verify_flags |= OCSP_NOINTERN;
 271         else if (!strcmp(*args, "-badsig"))
 272             badsig = 1;
 273         else if (!strcmp(*args, "-text")) {
 274             req_text = 1;
 275             resp_text = 1;
 276         } else if (!strcmp(*args, "-req_text"))
 277             req_text = 1;
 278         else if (!strcmp(*args, "-resp_text"))
 279             resp_text = 1;
 280         else if (!strcmp(*args, "-reqin")) {
 281             if (args[1]) {
 282                 args++;
 283                 reqin = *args;
 284             } else
 285                 badarg = 1;
 286         } else if (!strcmp(*args, "-respin")) {
 287             if (args[1]) {
 288                 args++;
 289                 respin = *args;
 290             } else
 291                 badarg = 1;
 292         } else if (!strcmp(*args, "-signer")) {
 293             if (args[1]) {
 294                 args++;
 295                 signfile = *args;
 296             } else
 297                 badarg = 1;
 298         } else if (!strcmp(*args, "-VAfile")) {
 299             if (args[1]) {
 300                 args++;
 301                 verify_certfile = *args;
 302                 verify_flags |= OCSP_TRUSTOTHER;
 303             } else
 304                 badarg = 1;
 305         } else if (!strcmp(*args, "-sign_other")) {
 306             if (args[1]) {
 307                 args++;
 308                 sign_certfile = *args;
 309             } else
 310                 badarg = 1;
 311         } else if (!strcmp(*args, "-verify_other")) {
 312             if (args[1]) {
 313                 args++;
 314                 verify_certfile = *args;
 315             } else
 316                 badarg = 1;
 317         } else if (!strcmp(*args, "-CAfile")) {
 318             if (args[1]) {
 319                 args++;
 320                 CAfile = *args;
 321             } else
 322                 badarg = 1;
 323         } else if (!strcmp(*args, "-CApath")) {
 324             if (args[1]) {
 325                 args++;
 326                 CApath = *args;
 327             } else
 328                 badarg = 1;
 329         } else if (args_verify(&args, NULL, &badarg, bio_err, &vpm)) {
 330             if (badarg)
 331                 goto end;
 332             continue;
 333         } else if (!strcmp(*args, "-validity_period")) {
 334             if (args[1]) {
 335                 args++;
 336                 nsec = atol(*args);
 337                 if (nsec < 0) {
 338                     BIO_printf(bio_err,
 339                                "Illegal validity period %s\n", *args);
 340                     badarg = 1;
 341                 }
 342             } else
 343                 badarg = 1;
 344         } else if (!strcmp(*args, "-status_age")) {
 345             if (args[1]) {
 346                 args++;
 347                 maxage = atol(*args);
 348                 if (maxage < 0) {
 349                     BIO_printf(bio_err, "Illegal validity age %s\n", *args);
 350                     badarg = 1;
 351                 }
 352             } else
 353                 badarg = 1;
 354         } else if (!strcmp(*args, "-signkey")) {
 355             if (args[1]) {
 356                 args++;
 357                 keyfile = *args;
 358             } else
 359                 badarg = 1;
 360         } else if (!strcmp(*args, "-reqout")) {
 361             if (args[1]) {
 362                 args++;
 363                 reqout = *args;
 364             } else
 365                 badarg = 1;
 366         } else if (!strcmp(*args, "-respout")) {
 367             if (args[1]) {
 368                 args++;
 369                 respout = *args;
 370             } else
 371                 badarg = 1;
 372         } else if (!strcmp(*args, "-path")) {
 373             if (args[1]) {
 374                 args++;
 375                 path = *args;
 376             } else
 377                 badarg = 1;
 378         } else if (!strcmp(*args, "-issuer")) {
 379             if (args[1]) {
 380                 args++;
 381                 X509_free(issuer);
 382                 issuer = load_cert(bio_err, *args, FORMAT_PEM,
 383                                    NULL, e, "issuer certificate");
 384                 if (!issuer)
 385                     goto end;
 386             } else
 387                 badarg = 1;
 388         } else if (!strcmp(*args, "-cert")) {
 389             if (args[1]) {
 390                 args++;
 391                 X509_free(cert);
 392                 cert = load_cert(bio_err, *args, FORMAT_PEM,
 393                                  NULL, e, "certificate");
 394                 if (!cert)
 395                     goto end;
 396                 if (!cert_id_md)
 397                     cert_id_md = EVP_sha1();
 398                 if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 399                     goto end;
 400                 if (!sk_OPENSSL_STRING_push(reqnames, *args))
 401                     goto end;
 402             } else
 403                 badarg = 1;
 404         } else if (!strcmp(*args, "-serial")) {
 405             if (args[1]) {
 406                 args++;
 407                 if (!cert_id_md)
 408                     cert_id_md = EVP_sha1();
 409                 if (!add_ocsp_serial(&req, *args, cert_id_md, issuer, ids))
 410                     goto end;
 411                 if (!sk_OPENSSL_STRING_push(reqnames, *args))
 412                     goto end;
 413             } else
 414                 badarg = 1;
 415         } else if (!strcmp(*args, "-index")) {
 416             if (args[1]) {
 417                 args++;
 418                 ridx_filename = *args;
 419             } else
 420                 badarg = 1;
 421         } else if (!strcmp(*args, "-CA")) {
 422             if (args[1]) {
 423                 args++;
 424                 rca_filename = *args;
 425             } else
 426                 badarg = 1;
 427         } else if (!strcmp(*args, "-nmin")) {
 428             if (args[1]) {
 429                 args++;
 430                 nmin = atol(*args);
 431                 if (nmin < 0) {
 432                     BIO_printf(bio_err, "Illegal update period %s\n", *args);
 433                     badarg = 1;
 434                 }
 435             }
 436             if (ndays == -1)
 437                 ndays = 0;
 438             else
 439                 badarg = 1;
 440         } else if (!strcmp(*args, "-nrequest")) {
 441             if (args[1]) {
 442                 args++;
 443                 accept_count = atol(*args);
 444                 if (accept_count < 0) {
 445                     BIO_printf(bio_err, "Illegal accept count %s\n", *args);
 446                     badarg = 1;
 447                 }
 448             } else
 449                 badarg = 1;
 450         } else if (!strcmp(*args, "-ndays")) {
 451             if (args[1]) {
 452                 args++;
 453                 ndays = atol(*args);
 454                 if (ndays < 0) {
 455                     BIO_printf(bio_err, "Illegal update period %s\n", *args);
 456                     badarg = 1;
 457                 }
 458             } else
 459                 badarg = 1;
 460         } else if (!strcmp(*args, "-rsigner")) {
 461             if (args[1]) {
 462                 args++;
 463                 rsignfile = *args;
 464             } else
 465                 badarg = 1;
 466         } else if (!strcmp(*args, "-rkey")) {
 467             if (args[1]) {
 468                 args++;
 469                 rkeyfile = *args;
 470             } else
 471                 badarg = 1;
 472         } else if (!strcmp(*args, "-rother")) {
 473             if (args[1]) {
 474                 args++;
 475                 rcertfile = *args;
 476             } else
 477                 badarg = 1;
 478         } else if (!strcmp(*args, "-rmd")) {
 479             if (args[1]) {
 480                 args++;
 481                 rsign_md = EVP_get_digestbyname(*args);
 482                 if (!rsign_md)
 483                     badarg = 1;
 484             } else
 485                 badarg = 1;
 486         } else if ((cert_id_md = EVP_get_digestbyname((*args) + 1)) == NULL) {
 487             badarg = 1;
 488         }
 489         args++;
 490     }
 491
 492     /* Have we anything to do? */
 493     if (!req && !reqin && !respin && !(port && ridx_filename))
 494         badarg = 1;
 495
 496     if (badarg) {
 497         BIO_printf(bio_err, "OCSP utility\n");
 498         BIO_printf(bio_err, "Usage ocsp [options]\n");
 499         BIO_printf(bio_err, "where options are\n");
 500         BIO_printf(bio_err, "-out file            output filename\n");
 501         BIO_printf(bio_err, "-issuer file         issuer certificate\n");
 502         BIO_printf(bio_err, "-cert file           certificate to check\n");
 503         BIO_printf(bio_err, "-serial n            serial number to check\n");
 504         BIO_printf(bio_err,
 505                    "-signer file         certificate to sign OCSP request with\n");
 506         BIO_printf(bio_err,
 507                    "-signkey file        private key to sign OCSP request with\n");
 508         BIO_printf(bio_err,
 509                    "-sign_other file     additional certificates to include in signed request\n");
 510         BIO_printf(bio_err,
 511                    "-no_certs            don't include any certificates in signed request\n");
 512         BIO_printf(bio_err,
 513                    "-req_text            print text form of request\n");
 514         BIO_printf(bio_err,
 515                    "-resp_text           print text form of response\n");
 516         BIO_printf(bio_err,
 517                    "-text                print text form of request and response\n");
 518         BIO_printf(bio_err,
 519                    "-reqout file         write DER encoded OCSP request to \"file\"\n");
 520         BIO_printf(bio_err,
 521                    "-respout file        write DER encoded OCSP reponse to \"file\"\n");
 522         BIO_printf(bio_err,
 523                    "-reqin file          read DER encoded OCSP request from \"file\"\n");
 524         BIO_printf(bio_err,
 525                    "-respin file         read DER encoded OCSP reponse from \"file\"\n");
 526         BIO_printf(bio_err,
 527                    "-nonce               add OCSP nonce to request\n");
 528         BIO_printf(bio_err,
 529                    "-no_nonce            don't add OCSP nonce to request\n");
 530         BIO_printf(bio_err, "-url URL             OCSP responder URL\n");
 531         BIO_printf(bio_err,
 532                    "-host host:n         send OCSP request to host on port n\n");
 533         BIO_printf(bio_err,
 534                    "-path                path to use in OCSP request\n");
 535         BIO_printf(bio_err,
 536                    "-CApath dir          trusted certificates directory\n");
 537         BIO_printf(bio_err,
 538                    "-CAfile file         trusted certificates file\n");
 539         BIO_printf(bio_err,
 540                    "-no_alt_chains       only ever use the first certificate chain found\n");
 541         BIO_printf(bio_err,
 542                    "-VAfile file         validator certificates file\n");
 543         BIO_printf(bio_err,
 544                    "-validity_period n   maximum validity discrepancy in seconds\n");
 545         BIO_printf(bio_err,
 546                    "-status_age n        maximum status age in seconds\n");
 547         BIO_printf(bio_err,
 548                    "-noverify            don't verify response at all\n");
 549         BIO_printf(bio_err,
 550                    "-verify_other file   additional certificates to search for signer\n");
 551         BIO_printf(bio_err,
 552                    "-trust_other         don't verify additional certificates\n");
 553         BIO_printf(bio_err,
 554                    "-no_intern           don't search certificates contained in response for signer\n");
 555         BIO_printf(bio_err,
 556                    "-no_signature_verify don't check signature on response\n");
 557         BIO_printf(bio_err,
 558                    "-no_cert_verify      don't check signing certificate\n");
 559         BIO_printf(bio_err,
 560                    "-no_chain            don't chain verify response\n");
 561         BIO_printf(bio_err,
 562                    "-no_cert_checks      don't do additional checks on signing certificate\n");
 563         BIO_printf(bio_err,
 564                    "-port num            port to run responder on\n");
 565         BIO_printf(bio_err,
 566                    "-index file          certificate status index file\n");
 567         BIO_printf(bio_err, "-CA file             CA certificate\n");
 568         BIO_printf(bio_err,
 569                    "-rsigner file        responder certificate to sign responses with\n");
 570         BIO_printf(bio_err,
 571                    "-rkey file           responder key to sign responses with\n");
 572         BIO_printf(bio_err,
 573                    "-rother file         other certificates to include in response\n");
 574         BIO_printf(bio_err,
 575                    "-resp_no_certs       don't include any certificates in response\n");
 576         BIO_printf(bio_err,
 577                    "-nmin n              number of minutes before next update\n");
 578         BIO_printf(bio_err,
 579                    "-ndays n             number of days before next update\n");
 580         BIO_printf(bio_err,
 581                    "-resp_key_id         identify reponse by signing certificate key ID\n");
 582         BIO_printf(bio_err,
 583                    "-nrequest n          number of requests to accept (default unlimited)\n");
 584         BIO_printf(bio_err,
 585                    "-<dgst alg>          use specified digest in the request\n");
 586         BIO_printf(bio_err,
 587                    "-timeout n           timeout connection to OCSP responder after n seconds\n");
 588         goto end;
 589     }
 590
 591     if (outfile)
 592         out = BIO_new_file(outfile, "w");
 593     else
 594         out = BIO_new_fp(stdout, BIO_NOCLOSE);
 595
 596     if (!out) {
 597         BIO_printf(bio_err, "Error opening output file\n");
 598         goto end;
 599     }
 600
 601     if (!req && (add_nonce != 2))
 602         add_nonce = 0;
 603
 604     if (!req && reqin) {
 605         if (!strcmp(reqin, "-"))
 606             derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
 607         else
 608             derbio = BIO_new_file(reqin, "rb");
 609         if (!derbio) {
 610             BIO_printf(bio_err, "Error Opening OCSP request file\n");
 611             goto end;
 612         }
 613         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 614         BIO_free(derbio);
 615         if (!req) {
 616             BIO_printf(bio_err, "Error reading OCSP request\n");
 617             goto end;
 618         }
 619     }
 620
 621     if (!req && port) {
 622         acbio = init_responder(port);
 623         if (!acbio)
 624             goto end;
 625     }
 626
 627     if (rsignfile && !rdb) {
 628         if (!rkeyfile)
 629             rkeyfile = rsignfile;
 630         rsigner = load_cert(bio_err, rsignfile, FORMAT_PEM,
 631                             NULL, e, "responder certificate");
 632         if (!rsigner) {
 633             BIO_printf(bio_err, "Error loading responder certificate\n");
 634             goto end;
 635         }
 636         rca_cert = load_cert(bio_err, rca_filename, FORMAT_PEM,
 637                              NULL, e, "CA certificate");
 638         if (rcertfile) {
 639             rother = load_certs(bio_err, rcertfile, FORMAT_PEM,
 640                                 NULL, e, "responder other certificates");
 641             if (!rother)
 642                 goto end;
 643         }
 644         rkey = load_key(bio_err, rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 645                         "responder private key");
 646         if (!rkey)
 647             goto end;
 648     }
 649     if (acbio)
 650         BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
 651
 652  redo_accept:
 653
 654     if (acbio) {
 655         if (!do_responder(&req, &cbio, acbio, port))
 656             goto end;
 657         if (!req) {
 658             resp =
 659                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 660                                      NULL);
 661             send_ocsp_response(cbio, resp);
 662             goto done_resp;
 663         }
 664     }
 665
 666     if (!req && (signfile || reqout || host || add_nonce || ridx_filename)) {
 667         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 668         goto end;
 669     }
 670
 671     if (req && add_nonce)
 672         OCSP_request_add1_nonce(req, NULL, -1);
 673
 674     if (signfile) {
 675         if (!keyfile)
 676             keyfile = signfile;
 677         signer = load_cert(bio_err, signfile, FORMAT_PEM,
 678                            NULL, e, "signer certificate");
 679         if (!signer) {
 680             BIO_printf(bio_err, "Error loading signer certificate\n");
 681             goto end;
 682         }
 683         if (sign_certfile) {
 684             sign_other = load_certs(bio_err, sign_certfile, FORMAT_PEM,
 685                                     NULL, e, "signer certificates");
 686             if (!sign_other)
 687                 goto end;
 688         }
 689         key = load_key(bio_err, keyfile, FORMAT_PEM, 0, NULL, NULL,
 690                        "signer private key");
 691         if (!key)
 692             goto end;
 693
 694         if (!OCSP_request_sign
 695             (req, signer, key, NULL, sign_other, sign_flags)) {
 696             BIO_printf(bio_err, "Error signing OCSP request\n");
 697             goto end;
 698         }
 699     }
 700
 701     if (req_text && req)
 702         OCSP_REQUEST_print(out, req, 0);
 703
 704     if (reqout) {
 705         if (!strcmp(reqout, "-"))
 706             derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
 707         else
 708             derbio = BIO_new_file(reqout, "wb");
 709         if (!derbio) {
 710             BIO_printf(bio_err, "Error opening file %s\n", reqout);
 711             goto end;
 712         }
 713         i2d_OCSP_REQUEST_bio(derbio, req);
 714         BIO_free(derbio);
 715     }
 716
 717     if (ridx_filename && (!rkey || !rsigner || !rca_cert)) {
 718         BIO_printf(bio_err,
 719                    "Need a responder certificate, key and CA for this operation!\n");
 720         goto end;
 721     }
 722
 723     if (ridx_filename && !rdb) {
 724         rdb = load_index(ridx_filename, NULL);
 725         if (!rdb)
 726             goto end;
 727         if (!index_index(rdb))
 728             goto end;
 729     }
 730
 731     if (rdb) {
 732         i = make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey,
 733                                rsign_md, rother, rflags, nmin, ndays, badsig);
 734         if (cbio)
 735             send_ocsp_response(cbio, resp);
 736     } else if (host) {
 737 # ifndef OPENSSL_NO_SOCK
 738         resp = process_responder(bio_err, req, host, path,
 739                                  port, use_ssl, headers, req_timeout);
 740         if (!resp)
 741             goto end;
 742 # else
 743         BIO_printf(bio_err,
 744                    "Error creating connect BIO - sockets not supported.\n");
 745         goto end;
 746 # endif
 747     } else if (respin) {
 748         if (!strcmp(respin, "-"))
 749             derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
 750         else
 751             derbio = BIO_new_file(respin, "rb");
 752         if (!derbio) {
 753             BIO_printf(bio_err, "Error Opening OCSP response file\n");
 754             goto end;
 755         }
 756         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 757         BIO_free(derbio);
 758         if (!resp) {
 759             BIO_printf(bio_err, "Error reading OCSP response\n");
 760             goto end;
 761         }
 762
 763     } else {
 764         ret = 0;
 765         goto end;
 766     }
 767
 768  done_resp:
 769
 770     if (respout) {
 771         if (!strcmp(respout, "-"))
 772             derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
 773         else
 774             derbio = BIO_new_file(respout, "wb");
 775         if (!derbio) {
 776             BIO_printf(bio_err, "Error opening file %s\n", respout);
 777             goto end;
 778         }
 779         i2d_OCSP_RESPONSE_bio(derbio, resp);
 780         BIO_free(derbio);
 781     }
 782
 783     i = OCSP_response_status(resp);
 784
 785     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 786         BIO_printf(out, "Responder Error: %s (%d)\n",
 787                    OCSP_response_status_str(i), i);
 788         if (ignore_err)
 789             goto redo_accept;
 790         ret = 0;
 791         goto end;
 792     }
 793
 794     if (resp_text)
 795         OCSP_RESPONSE_print(out, resp, 0);
 796
 797     /* If running as responder don't verify our own response */
 798     if (cbio) {
 799         if (accept_count > 0)
 800             accept_count--;
 801         /* Redo if more connections needed */
 802         if (accept_count) {
 803             BIO_free_all(cbio);
 804             cbio = NULL;
 805             OCSP_REQUEST_free(req);
 806             req = NULL;
 807             OCSP_RESPONSE_free(resp);
 808             resp = NULL;
 809             goto redo_accept;
 810         }
 811         ret = 0;
 812         goto end;
 813     } else if (ridx_filename) {
 814         ret = 0;
 815         goto end;
 816     }
 817
 818     if (!store)
 819         store = setup_verify(bio_err, CAfile, CApath);
 820     if (!store)
 821         goto end;
 822     if (vpm)
 823         X509_STORE_set1_param(store, vpm);
 824     if (verify_certfile) {
 825         verify_other = load_certs(bio_err, verify_certfile, FORMAT_PEM,
 826                                   NULL, e, "validator certificate");
 827         if (!verify_other)
 828             goto end;
 829     }
 830
 831     bs = OCSP_response_get1_basic(resp);
 832
 833     if (!bs) {
 834         BIO_printf(bio_err, "Error parsing response\n");
 835         goto end;
 836     }
 837
 838     ret = 0;
 839
 840     if (!noverify) {
 841         if (req && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 842             if (i == -1)
 843                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 844             else {
 845                 BIO_printf(bio_err, "Nonce Verify error\n");
 846                 ret = 1;
 847                 goto end;
 848             }
 849         }
 850
 851         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 852         if (i <= 0) {
 853             BIO_printf(bio_err, "Response Verify Failure\n");
 854             ERR_print_errors(bio_err);
 855             ret = 1;
 856         } else
 857             BIO_printf(bio_err, "Response verify OK\n");
 858
 859     }
 860
 861     if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
 862         ret = 1;
 863
 864  end:
 865     ERR_print_errors(bio_err);
 866     X509_free(signer);
 867     X509_STORE_free(store);
 868     if (vpm)
 869         X509_VERIFY_PARAM_free(vpm);
 870     EVP_PKEY_free(key);
 871     EVP_PKEY_free(rkey);
 872     X509_free(issuer);
 873     X509_free(cert);
 874     X509_free(rsigner);
 875     X509_free(rca_cert);
 876     free_index(rdb);
 877     BIO_free_all(cbio);
 878     BIO_free_all(acbio);
 879     BIO_free(out);
 880     OCSP_REQUEST_free(req);
 881     OCSP_RESPONSE_free(resp);
 882     OCSP_BASICRESP_free(bs);
 883     sk_OPENSSL_STRING_free(reqnames);
 884     sk_OCSP_CERTID_free(ids);
 885     sk_X509_pop_free(sign_other, X509_free);
 886     sk_X509_pop_free(verify_other, X509_free);
 887     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 888
 889     if (thost)
 890         OPENSSL_free(thost);
 891     if (tport)
 892         OPENSSL_free(tport);
 893     if (tpath)
 894         OPENSSL_free(tpath);
 895
 896     OPENSSL_EXIT(ret);
 897 }
 898
 899 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
 900                          const EVP_MD *cert_id_md, X509 *issuer,
 901                          STACK_OF(OCSP_CERTID) *ids)
 902 {
 903     OCSP_CERTID *id;
 904     if (!issuer) {
 905         BIO_printf(bio_err, "No issuer certificate specified\n");
 906         return 0;
 907     }
 908     if (!*req)
 909         *req = OCSP_REQUEST_new();
 910     if (!*req)
 911         goto err;
 912     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
 913     if (!id || !sk_OCSP_CERTID_push(ids, id))
 914         goto err;
 915     if (!OCSP_request_add0_id(*req, id))
 916         goto err;
 917     return 1;
 918
 919  err:
 920     BIO_printf(bio_err, "Error Creating OCSP request\n");
 921     return 0;
 922 }
 923
 924 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
 925                            const EVP_MD *cert_id_md, X509 *issuer,
 926                            STACK_OF(OCSP_CERTID) *ids)
 927 {
 928     OCSP_CERTID *id;
 929     X509_NAME *iname;
 930     ASN1_BIT_STRING *ikey;
 931     ASN1_INTEGER *sno;
 932     if (!issuer) {
 933         BIO_printf(bio_err, "No issuer certificate specified\n");
 934         return 0;
 935     }
 936     if (!*req)
 937         *req = OCSP_REQUEST_new();
 938     if (!*req)
 939         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         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
 945         return 0;
 946     }
 947     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
 948     ASN1_INTEGER_free(sno);
 949     if (!id || !sk_OCSP_CERTID_push(ids, id))
 950         goto err;
 951     if (!OCSP_request_add0_id(*req, id))
 952         goto err;
 953     return 1;
 954
 955  err:
 956     BIO_printf(bio_err, "Error Creating OCSP request\n");
 957     return 0;
 958 }
 959
 960 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
 961                               STACK_OF(OPENSSL_STRING) *names,
 962                               STACK_OF(OCSP_CERTID) *ids, long nsec,
 963                               long maxage)
 964 {
 965     OCSP_CERTID *id;
 966     char *name;
 967     int i;
 968
 969     int status, reason;
 970
 971     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 972
 973     if (!bs || !req || !sk_OPENSSL_STRING_num(names)
 974         || !sk_OCSP_CERTID_num(ids))
 975         return 1;
 976
 977     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
 978         id = sk_OCSP_CERTID_value(ids, i);
 979         name = sk_OPENSSL_STRING_value(names, i);
 980         BIO_printf(out, "%s: ", name);
 981
 982         if (!OCSP_resp_find_status(bs, id, &status, &reason,
 983                                    &rev, &thisupd, &nextupd)) {
 984             BIO_puts(out, "ERROR: No Status found.\n");
 985             continue;
 986         }
 987
 988         /*
 989          * Check validity: if invalid write to output BIO so we know which
 990          * response this refers to.
 991          */
 992         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
 993             BIO_puts(out, "WARNING: Status times invalid.\n");
 994             ERR_print_errors(out);
 995         }
 996         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
 997
 998         BIO_puts(out, "\tThis Update: ");
 999         ASN1_GENERALIZEDTIME_print(out, thisupd);
1000         BIO_puts(out, "\n");
1001
1002         if (nextupd) {
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", OCSP_crl_reason_str(reason));
1013
1014         BIO_puts(out, "\tRevocation Time: ");
1015         ASN1_GENERALIZEDTIME_print(out, rev);
1016         BIO_puts(out, "\n");
1017     }
1018
1019     return 1;
1020 }
1021
1022 static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1023                               CA_DB *db, X509 *ca, X509 *rcert,
1024                               EVP_PKEY *rkey, const EVP_MD *rmd,
1025                               STACK_OF(X509) *rother, unsigned long flags,
1026                               int nmin, int ndays, int badsig)
1027 {
1028     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1029     OCSP_CERTID *cid, *ca_id = NULL;
1030     OCSP_BASICRESP *bs = NULL;
1031     int i, id_count, ret = 1;
1032
1033     id_count = OCSP_request_onereq_count(req);
1034
1035     if (id_count <= 0) {
1036         *resp =
1037             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1038         goto end;
1039     }
1040
1041     bs = OCSP_BASICRESP_new();
1042     thisupd = X509_gmtime_adj(NULL, 0);
1043     if (ndays != -1)
1044         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1045
1046     /* Examine each certificate id in the request */
1047     for (i = 0; i < id_count; i++) {
1048         OCSP_ONEREQ *one;
1049         ASN1_INTEGER *serial;
1050         char **inf;
1051         ASN1_OBJECT *cert_id_md_oid;
1052         const EVP_MD *cert_id_md;
1053         one = OCSP_request_onereq_get0(req, i);
1054         cid = OCSP_onereq_get0_id(one);
1055
1056         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1057
1058         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1059         if (!cert_id_md) {
1060             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1061                                          NULL);
1062             goto end;
1063         }
1064         if (ca_id)
1065             OCSP_CERTID_free(ca_id);
1066         ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
1067
1068         /* Is this request about our CA? */
1069         if (OCSP_id_issuer_cmp(ca_id, cid)) {
1070             OCSP_basic_add1_status(bs, cid,
1071                                    V_OCSP_CERTSTATUS_UNKNOWN,
1072                                    0, NULL, thisupd, nextupd);
1073             continue;
1074         }
1075         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1076         inf = lookup_serial(db, serial);
1077         if (!inf)
1078             OCSP_basic_add1_status(bs, cid,
1079                                    V_OCSP_CERTSTATUS_UNKNOWN,
1080                                    0, NULL, thisupd, nextupd);
1081         else if (inf[DB_type][0] == DB_TYPE_VAL)
1082             OCSP_basic_add1_status(bs, cid,
1083                                    V_OCSP_CERTSTATUS_GOOD,
1084                                    0, NULL, thisupd, nextupd);
1085         else if (inf[DB_type][0] == DB_TYPE_REV) {
1086             ASN1_OBJECT *inst = NULL;
1087             ASN1_TIME *revtm = NULL;
1088             ASN1_GENERALIZEDTIME *invtm = NULL;
1089             OCSP_SINGLERESP *single;
1090             int reason = -1;
1091             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1092             single = OCSP_basic_add1_status(bs, cid,
1093                                             V_OCSP_CERTSTATUS_REVOKED,
1094                                             reason, revtm, thisupd, nextupd);
1095             if (invtm)
1096                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1097                                              invtm, 0, 0);
1098             else if (inst)
1099                 OCSP_SINGLERESP_add1_ext_i2d(single,
1100                                              NID_hold_instruction_code, inst,
1101                                              0, 0);
1102             ASN1_OBJECT_free(inst);
1103             ASN1_TIME_free(revtm);
1104             ASN1_GENERALIZEDTIME_free(invtm);
1105         }
1106     }
1107
1108     OCSP_copy_nonce(bs, req);
1109
1110     OCSP_basic_sign(bs, rcert, rkey, rmd, rother, flags);
1111
1112     if (badsig)
1113         bs->signature->data[bs->signature->length - 1] ^= 0x1;
1114
1115     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1116
1117  end:
1118     ASN1_TIME_free(thisupd);
1119     ASN1_TIME_free(nextupd);
1120     OCSP_CERTID_free(ca_id);
1121     OCSP_BASICRESP_free(bs);
1122     return ret;
1123
1124 }
1125
1126 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1127 {
1128     int i;
1129     BIGNUM *bn = NULL;
1130     char *itmp, *row[DB_NUMBER], **rrow;
1131     for (i = 0; i < DB_NUMBER; i++)
1132         row[i] = NULL;
1133     bn = ASN1_INTEGER_to_BN(ser, NULL);
1134     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1135                                  * point and abort */
1136     if (BN_is_zero(bn))
1137         itmp = BUF_strdup("00");
1138     else
1139         itmp = BN_bn2hex(bn);
1140     row[DB_serial] = itmp;
1141     BN_free(bn);
1142     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1143     OPENSSL_free(itmp);
1144     return rrow;
1145 }
1146
1147 /* Quick and dirty OCSP server: read in and parse input request */
1148
1149 static BIO *init_responder(const char *port)
1150 {
1151     BIO *acbio = NULL, *bufbio = NULL;
1152     bufbio = BIO_new(BIO_f_buffer());
1153     if (!bufbio)
1154         goto err;
1155 # ifndef OPENSSL_NO_SOCK
1156     acbio = BIO_new_accept(port);
1157 # else
1158     BIO_printf(bio_err,
1159                "Error setting up accept BIO - sockets not supported.\n");
1160 # endif
1161     if (!acbio)
1162         goto err;
1163     BIO_set_accept_bios(acbio, bufbio);
1164     bufbio = NULL;
1165
1166     if (BIO_do_accept(acbio) <= 0) {
1167         BIO_printf(bio_err, "Error setting up accept BIO\n");
1168         ERR_print_errors(bio_err);
1169         goto err;
1170     }
1171
1172     return acbio;
1173
1174  err:
1175     BIO_free_all(acbio);
1176     BIO_free(bufbio);
1177     return NULL;
1178 }
1179
1180 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1181                         const char *port)
1182 {
1183     int have_post = 0, len;
1184     OCSP_REQUEST *req = NULL;
1185     char inbuf[1024];
1186     BIO *cbio = NULL;
1187
1188     if (BIO_do_accept(acbio) <= 0) {
1189         BIO_printf(bio_err, "Error accepting connection\n");
1190         ERR_print_errors(bio_err);
1191         return 0;
1192     }
1193
1194     cbio = BIO_pop(acbio);
1195     *pcbio = cbio;
1196
1197     for (;;) {
1198         len = BIO_gets(cbio, inbuf, sizeof inbuf);
1199         if (len <= 0)
1200             return 1;
1201         /* Look for "POST" signalling start of query */
1202         if (!have_post) {
1203             if (strncmp(inbuf, "POST", 4)) {
1204                 BIO_printf(bio_err, "Invalid request\n");
1205                 return 1;
1206             }
1207             have_post = 1;
1208         }
1209         /* Look for end of headers */
1210         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1211             break;
1212     }
1213
1214     /* Try to read OCSP request */
1215
1216     req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1217
1218     if (!req) {
1219         BIO_printf(bio_err, "Error parsing OCSP request\n");
1220         ERR_print_errors(bio_err);
1221     }
1222
1223     *preq = req;
1224
1225     return 1;
1226
1227 }
1228
1229 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1230 {
1231     char http_resp[] =
1232         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1233         "Content-Length: %d\r\n\r\n";
1234     if (!cbio)
1235         return 0;
1236     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1237     i2d_OCSP_RESPONSE_bio(cbio, resp);
1238     (void)BIO_flush(cbio);
1239     return 1;
1240 }
1241
1242 static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
1243                                       const STACK_OF(CONF_VALUE) *headers,
1244                                       OCSP_REQUEST *req, int req_timeout)
1245 {
1246     int fd;
1247     int rv;
1248     int i;
1249     OCSP_REQ_CTX *ctx = NULL;
1250     OCSP_RESPONSE *rsp = NULL;
1251     fd_set confds;
1252     struct timeval tv;
1253
1254     if (req_timeout != -1)
1255         BIO_set_nbio(cbio, 1);
1256
1257     rv = BIO_do_connect(cbio);
1258
1259     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1260         BIO_puts(err, "Error connecting BIO\n");
1261         return NULL;
1262     }
1263
1264     if (BIO_get_fd(cbio, &fd) < 0) {
1265         BIO_puts(bio_err, "Can't get connection fd\n");
1266         goto err;
1267     }
1268
1269     if (req_timeout != -1 && rv <= 0) {
1270         FD_ZERO(&confds);
1271         openssl_fdset(fd, &confds);
1272         tv.tv_usec = 0;
1273         tv.tv_sec = req_timeout;
1274         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1275         if (rv == 0) {
1276             BIO_puts(err, "Timeout on connect\n");
1277             return NULL;
1278         }
1279     }
1280
1281     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1282     if (!ctx)
1283         return NULL;
1284
1285     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1286         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1287         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1288             goto err;
1289     }
1290
1291     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1292         goto err;
1293
1294     for (;;) {
1295         rv = OCSP_sendreq_nbio(&rsp, ctx);
1296         if (rv != -1)
1297             break;
1298         if (req_timeout == -1)
1299             continue;
1300         FD_ZERO(&confds);
1301         openssl_fdset(fd, &confds);
1302         tv.tv_usec = 0;
1303         tv.tv_sec = req_timeout;
1304         if (BIO_should_read(cbio))
1305             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1306         else if (BIO_should_write(cbio))
1307             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1308         else {
1309             BIO_puts(err, "Unexpected retry condition\n");
1310             goto err;
1311         }
1312         if (rv == 0) {
1313             BIO_puts(err, "Timeout on request\n");
1314             break;
1315         }
1316         if (rv == -1) {
1317             BIO_puts(err, "Select error\n");
1318             break;
1319         }
1320
1321     }
1322  err:
1323     if (ctx)
1324         OCSP_REQ_CTX_free(ctx);
1325
1326     return rsp;
1327 }
1328
1329 OCSP_RESPONSE *process_responder(BIO *err, OCSP_REQUEST *req,
1330                                  const char *host, const char *path,
1331                                  const char *port, int use_ssl,
1332                                  const STACK_OF(CONF_VALUE) *headers,
1333                                  int req_timeout)
1334 {
1335     BIO *cbio = NULL;
1336     SSL_CTX *ctx = NULL;
1337     OCSP_RESPONSE *resp = NULL;
1338     cbio = BIO_new_connect(host);
1339     if (!cbio) {
1340         BIO_printf(err, "Error creating connect BIO\n");
1341         goto end;
1342     }
1343     if (port)
1344         BIO_set_conn_port(cbio, port);
1345     if (use_ssl == 1) {
1346         BIO *sbio;
1347         ctx = SSL_CTX_new(SSLv23_client_method());
1348         if (ctx == NULL) {
1349             BIO_printf(err, "Error creating SSL context.\n");
1350             goto end;
1351         }
1352         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1353         sbio = BIO_new_ssl(ctx, 1);
1354         cbio = BIO_push(sbio, cbio);
1355     }
1356     resp = query_responder(err, cbio, path, headers, req, req_timeout);
1357     if (!resp)
1358         BIO_printf(bio_err, "Error querying OCSP responder\n");
1359  end:
1360     if (cbio)
1361         BIO_free_all(cbio);
1362     if (ctx)
1363         SSL_CTX_free(ctx);
1364     return resp;
1365 }
1366
1367 #endif