apps/ocsp.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58 #ifndef OPENSSL_NO_OCSP
  59
  60 # ifdef OPENSSL_SYS_VMS
  61 #  define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
  62                                  * on OpenVMS */
  63 # endif
  64
  65 # define USE_SOCKETS
  66
  67 # include <stdio.h>
  68 # include <stdlib.h>
  69 # include <string.h>
  70 # include <time.h>
  71 # include <ctype.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 void 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 static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
 111                               CA_DB *db, X509 *ca, X509 *rcert,
 112                               EVP_PKEY *rkey, const EVP_MD *md,
 113                               STACK_OF(X509) *rother, unsigned long flags,
 114                               int nmin, int ndays, int badsig);
 115
 116 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
 117 static BIO *init_responder(const char *port);
 118 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
 119                         const char *port);
 120 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
 121 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *path,
 122                                       const STACK_OF(CONF_VALUE) *headers,
 123                                       OCSP_REQUEST *req, int req_timeout);
 124
 125 typedef enum OPTION_choice {
 126     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 127     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 128     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 129     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 130     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 131     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 132     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 133     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 134     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH,
 135     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 136     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 137     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 138     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_HEADER,
 139     OPT_V_ENUM,
 140     OPT_MD
 141 } OPTION_CHOICE;
 142
 143 OPTIONS ocsp_options[] = {
 144     {"help", OPT_HELP, '-', "Display this summary"},
 145     {"out", OPT_OUTFILE, '>', "Output filename"},
 146     {"timeout", OPT_TIMEOUT, 'p'},
 147     {"url", OPT_URL, 's', "Responder URL"},
 148     {"host", OPT_HOST, 's', "host:prot top to connect to"},
 149     {"port", OPT_PORT, 'p', "Port to run responder on"},
 150     {"ignore_err", OPT_IGNORE_ERR, '-'},
 151     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 152     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 153     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 154     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 155      "Don't include any certificates in response"},
 156     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 157      "Identify reponse by signing certificate key ID"},
 158     {"no_certs", OPT_NO_CERTS, '-',
 159      "Don't include any certificates in signed request"},
 160     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 161      "Don't check signature on response"},
 162     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 163      "Don't check signing certificate"},
 164     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 165     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 166      "Don't do additional checks on signing certificate"},
 167     {"no_explicit", OPT_NO_EXPLICIT, '-'},
 168     {"trust_other", OPT_TRUST_OTHER, '-',
 169      "Don't verify additional certificates"},
 170     {"no_intern", OPT_NO_INTERN, '-',
 171      "Don't search certificates contained in response for signer"},
 172     {"badsig", OPT_BADSIG, '-'},
 173     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 174     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 175     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 176     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 177     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 178     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 179     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 180     {"sign_other", OPT_SIGN_OTHER, '<',
 181      "Additional certificates to include in signed request"},
 182     {"verify_other", OPT_VERIFY_OTHER, '<',
 183      "Additional certificates to search for signer"},
 184     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 185     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 186     {"no-CAfile", OPT_NOCAFILE, '-',
 187      "Do not load the default certificates file"},
 188     {"no-CApath", OPT_NOCAPATH, '-',
 189      "Do not load certificates from the default certificates directory"},
 190     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 191      "Maximum validity discrepancy in seconds"},
 192     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 193     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 194     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 195     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 196     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 197     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 198     {"cert", OPT_CERT, '<', "Certificate to check"},
 199     {"serial", OPT_SERIAL, 's', "Nerial number to check"},
 200     {"index", OPT_INDEX, '<', "Certificate status index file"},
 201     {"CA", OPT_CA, '<', "CA certificate"},
 202     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 203     {"nrequest", OPT_REQUEST, 'p',
 204      "Number of requests to accept (default unlimited)"},
 205     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 206     {"rsigner", OPT_RSIGNER, '<',
 207      "Sesponder certificate to sign responses with"},
 208     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 209     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 210     {"rmd", OPT_RMD, 's'},
 211     {"header", OPT_HEADER, 's', "key=value header to add"},
 212     {"", OPT_MD, '-', "Any supported digest"},
 213     OPT_V_OPTIONS,
 214     {NULL}
 215 };
 216
 217 int ocsp_main(int argc, char **argv)
 218 {
 219     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 220     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 221     CA_DB *rdb = NULL;
 222     EVP_PKEY *key = NULL, *rkey = NULL;
 223     OCSP_BASICRESP *bs = NULL;
 224     OCSP_REQUEST *req = NULL;
 225     OCSP_RESPONSE *resp = NULL;
 226     STACK_OF(CONF_VALUE) *headers = NULL;
 227     STACK_OF(OCSP_CERTID) *ids = NULL;
 228     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 229     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 230     STACK_OF(X509) *issuers = NULL;
 231     X509 *issuer = NULL, *cert = NULL, *rca_cert = NULL;
 232     X509 *signer = NULL, *rsigner = NULL;
 233     X509_STORE *store = NULL;
 234     X509_VERIFY_PARAM *vpm = NULL;
 235     char *CAfile = NULL, *CApath = NULL, *header, *value;
 236     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 237     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 238     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 239     char *rsignfile = NULL, *rkeyfile = NULL;
 240     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 241     char *signfile = NULL, *keyfile = NULL;
 242     char *thost = NULL, *tport = NULL, *tpath = NULL;
 243     int noCAfile = 0, noCApath = 0;
 244     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 245     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 246     int req_text = 0, resp_text = 0, req_timeout = -1, ret = 1;
 247     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 248     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 249     OPTION_CHOICE o;
 250     char *prog;
 251
 252     reqnames = sk_OPENSSL_STRING_new_null();
 253     if (!reqnames)
 254         goto end;
 255     ids = sk_OCSP_CERTID_new_null();
 256     if (!ids)
 257         goto end;
 258     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 259         return 1;
 260
 261     prog = opt_init(argc, argv, ocsp_options);
 262     while ((o = opt_next()) != OPT_EOF) {
 263         switch (o) {
 264         case OPT_EOF:
 265         case OPT_ERR:
 266  opthelp:
 267             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 268             goto end;
 269         case OPT_HELP:
 270             ret = 0;
 271             opt_help(ocsp_options);
 272             goto end;
 273         case OPT_OUTFILE:
 274             outfile = opt_arg();
 275             break;
 276         case OPT_TIMEOUT:
 277             req_timeout = atoi(opt_arg());
 278             break;
 279         case OPT_URL:
 280             OPENSSL_free(thost);
 281             OPENSSL_free(tport);
 282             OPENSSL_free(tpath);
 283             thost = tport = tpath = NULL;
 284             if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
 285                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 286                 goto end;
 287             }
 288             thost = host;
 289             tport = port;
 290             tpath = path;
 291             break;
 292         case OPT_HOST:
 293             host = opt_arg();
 294             break;
 295         case OPT_PORT:
 296             port = opt_arg();
 297             break;
 298         case OPT_IGNORE_ERR:
 299             ignore_err = 1;
 300             break;
 301         case OPT_NOVERIFY:
 302             noverify = 1;
 303             break;
 304         case OPT_NONCE:
 305             add_nonce = 2;
 306             break;
 307         case OPT_NO_NONCE:
 308             add_nonce = 0;
 309             break;
 310         case OPT_RESP_NO_CERTS:
 311             rflags |= OCSP_NOCERTS;
 312             break;
 313         case OPT_RESP_KEY_ID:
 314             rflags |= OCSP_RESPID_KEY;
 315             break;
 316         case OPT_NO_CERTS:
 317             sign_flags |= OCSP_NOCERTS;
 318             break;
 319         case OPT_NO_SIGNATURE_VERIFY:
 320             verify_flags |= OCSP_NOSIGS;
 321             break;
 322         case OPT_NO_CERT_VERIFY:
 323             verify_flags |= OCSP_NOVERIFY;
 324             break;
 325         case OPT_NO_CHAIN:
 326             verify_flags |= OCSP_NOCHAIN;
 327             break;
 328         case OPT_NO_CERT_CHECKS:
 329             verify_flags |= OCSP_NOCHECKS;
 330             break;
 331         case OPT_NO_EXPLICIT:
 332             verify_flags |= OCSP_NOEXPLICIT;
 333             break;
 334         case OPT_TRUST_OTHER:
 335             verify_flags |= OCSP_TRUSTOTHER;
 336             break;
 337         case OPT_NO_INTERN:
 338             verify_flags |= OCSP_NOINTERN;
 339             break;
 340         case OPT_BADSIG:
 341             badsig = 1;
 342             break;
 343         case OPT_TEXT:
 344             req_text = resp_text = 1;
 345             break;
 346         case OPT_REQ_TEXT:
 347             req_text = 1;
 348             break;
 349         case OPT_RESP_TEXT:
 350             resp_text = 1;
 351             break;
 352         case OPT_REQIN:
 353             reqin = opt_arg();
 354             break;
 355         case OPT_RESPIN:
 356             respin = opt_arg();
 357             break;
 358         case OPT_SIGNER:
 359             signfile = opt_arg();
 360             break;
 361         case OPT_VAFILE:
 362             verify_certfile = opt_arg();
 363             verify_flags |= OCSP_TRUSTOTHER;
 364             break;
 365         case OPT_SIGN_OTHER:
 366             sign_certfile = opt_arg();
 367             break;
 368         case OPT_VERIFY_OTHER:
 369             verify_certfile = opt_arg();
 370             break;
 371         case OPT_CAFILE:
 372             CAfile = opt_arg();
 373             break;
 374         case OPT_CAPATH:
 375             CApath = opt_arg();
 376             break;
 377         case OPT_NOCAFILE:
 378             noCAfile = 1;
 379             break;
 380         case OPT_NOCAPATH:
 381             noCApath = 1;
 382             break;
 383         case OPT_V_CASES:
 384             if (!opt_verify(o, vpm))
 385                 goto end;
 386             vpmtouched++;
 387             break;
 388         case OPT_VALIDITY_PERIOD:
 389             opt_long(opt_arg(), &nsec);
 390             break;
 391         case OPT_STATUS_AGE:
 392             opt_long(opt_arg(), &maxage);
 393             break;
 394         case OPT_SIGNKEY:
 395             keyfile = opt_arg();
 396             break;
 397         case OPT_REQOUT:
 398             reqout = opt_arg();
 399             break;
 400         case OPT_RESPOUT:
 401             respout = opt_arg();
 402             break;
 403         case OPT_PATH:
 404             path = opt_arg();
 405             break;
 406         case OPT_ISSUER:
 407             X509_free(issuer);
 408             issuer = load_cert(opt_arg(), FORMAT_PEM,
 409                                NULL, NULL, "issuer certificate");
 410             if (issuer == NULL)
 411                 goto end;
 412             if ((issuers = sk_X509_new_null()) == NULL)
 413                 goto end;
 414             sk_X509_push(issuers, issuer);
 415             break;
 416         case OPT_CERT:
 417             X509_free(cert);
 418             cert = load_cert(opt_arg(), FORMAT_PEM,
 419                              NULL, NULL, "certificate");
 420             if (cert == NULL)
 421                 goto end;
 422             if (cert_id_md == NULL)
 423                 cert_id_md = EVP_sha1();
 424             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 425                 goto end;
 426             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 427                 goto end;
 428             break;
 429         case OPT_SERIAL:
 430             if (cert_id_md == NULL)
 431                 cert_id_md = EVP_sha1();
 432             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 433                 goto end;
 434             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 435                 goto end;
 436             break;
 437         case OPT_INDEX:
 438             ridx_filename = opt_arg();
 439             break;
 440         case OPT_CA:
 441             rca_filename = opt_arg();
 442             break;
 443         case OPT_NMIN:
 444             opt_int(opt_arg(), &nmin);
 445             if (ndays == -1)
 446                 ndays = 0;
 447             break;
 448         case OPT_REQUEST:
 449             opt_int(opt_arg(), &accept_count);
 450             break;
 451         case OPT_NDAYS:
 452             ndays = atoi(opt_arg());
 453             break;
 454         case OPT_RSIGNER:
 455             rsignfile = opt_arg();
 456             break;
 457         case OPT_RKEY:
 458             rkeyfile = opt_arg();
 459             break;
 460         case OPT_ROTHER:
 461             rcertfile = opt_arg();
 462             break;
 463         case OPT_RMD:
 464             if (!opt_md(opt_arg(), &rsign_md))
 465                 goto end;
 466             break;
 467         case OPT_HEADER:
 468             header = opt_arg();
 469             value = strchr(header, '=');
 470             if (value == NULL) {
 471                 BIO_printf(bio_err, "Missing = in header key=value\n");
 472                 goto opthelp;
 473             }
 474             *value++ = '\0';
 475             if (!X509V3_add_value(header, value, &headers))
 476                 goto end;
 477             break;
 478         case OPT_MD:
 479             if (cert_id_md != NULL) {
 480                 BIO_printf(bio_err,
 481                            "%s: Digest must be before -cert or -serial\n",
 482                            prog);
 483                 goto opthelp;
 484             }
 485             if (!opt_md(opt_unknown(), &cert_id_md))
 486                 goto opthelp;
 487             break;
 488         }
 489     }
 490     argc = opt_num_rest();
 491     argv = opt_rest();
 492
 493     /* Have we anything to do? */
 494     if (!req && !reqin && !respin && !(port && ridx_filename))
 495         goto opthelp;
 496
 497     if (!app_load_modules(NULL))
 498         goto end;
 499
 500     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 501     if (out == NULL)
 502         goto end;
 503
 504     if (!req && (add_nonce != 2))
 505         add_nonce = 0;
 506
 507     if (!req && reqin) {
 508         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 509         if (derbio == NULL)
 510             goto end;
 511         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 512         BIO_free(derbio);
 513         if (!req) {
 514             BIO_printf(bio_err, "Error reading OCSP request\n");
 515             goto end;
 516         }
 517     }
 518
 519     if (!req && port) {
 520         acbio = init_responder(port);
 521         if (!acbio)
 522             goto end;
 523     }
 524
 525     if (rsignfile && !rdb) {
 526         if (!rkeyfile)
 527             rkeyfile = rsignfile;
 528         rsigner = load_cert(rsignfile, FORMAT_PEM,
 529                             NULL, NULL, "responder certificate");
 530         if (!rsigner) {
 531             BIO_printf(bio_err, "Error loading responder certificate\n");
 532             goto end;
 533         }
 534         rca_cert = load_cert(rca_filename, FORMAT_PEM,
 535                              NULL, NULL, "CA certificate");
 536         if (rcertfile) {
 537             rother = load_certs(rcertfile, FORMAT_PEM,
 538                                 NULL, NULL, "responder other certificates");
 539             if (!rother)
 540                 goto end;
 541         }
 542         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 543                         "responder private key");
 544         if (!rkey)
 545             goto end;
 546     }
 547     if (acbio)
 548         BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
 549
 550  redo_accept:
 551
 552     if (acbio) {
 553         if (!do_responder(&req, &cbio, acbio, port))
 554             goto end;
 555         if (!req) {
 556             resp =
 557                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 558                                      NULL);
 559             send_ocsp_response(cbio, resp);
 560             goto done_resp;
 561         }
 562     }
 563
 564     if (!req && (signfile || reqout || host || add_nonce || ridx_filename)) {
 565         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 566         goto end;
 567     }
 568
 569     if (req && add_nonce)
 570         OCSP_request_add1_nonce(req, NULL, -1);
 571
 572     if (signfile) {
 573         if (!keyfile)
 574             keyfile = signfile;
 575         signer = load_cert(signfile, FORMAT_PEM,
 576                            NULL, NULL, "signer certificate");
 577         if (!signer) {
 578             BIO_printf(bio_err, "Error loading signer certificate\n");
 579             goto end;
 580         }
 581         if (sign_certfile) {
 582             sign_other = load_certs(sign_certfile, FORMAT_PEM,
 583                                     NULL, NULL, "signer certificates");
 584             if (!sign_other)
 585                 goto end;
 586         }
 587         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 588                        "signer private key");
 589         if (!key)
 590             goto end;
 591
 592         if (!OCSP_request_sign
 593             (req, signer, key, NULL, sign_other, sign_flags)) {
 594             BIO_printf(bio_err, "Error signing OCSP request\n");
 595             goto end;
 596         }
 597     }
 598
 599     if (req_text && req)
 600         OCSP_REQUEST_print(out, req, 0);
 601
 602     if (reqout) {
 603         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 604         if (derbio == NULL)
 605             goto end;
 606         i2d_OCSP_REQUEST_bio(derbio, req);
 607         BIO_free(derbio);
 608     }
 609
 610     if (ridx_filename && (!rkey || !rsigner || !rca_cert)) {
 611         BIO_printf(bio_err,
 612                    "Need a responder certificate, key and CA for this operation!\n");
 613         goto end;
 614     }
 615
 616     if (ridx_filename && !rdb) {
 617         rdb = load_index(ridx_filename, NULL);
 618         if (!rdb)
 619             goto end;
 620         if (!index_index(rdb))
 621             goto end;
 622     }
 623
 624     if (rdb) {
 625         make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey,
 626                                rsign_md, rother, rflags, nmin, ndays, badsig);
 627         if (cbio)
 628             send_ocsp_response(cbio, resp);
 629     } else if (host) {
 630 # ifndef OPENSSL_NO_SOCK
 631         resp = process_responder(req, host, path,
 632                                  port, use_ssl, headers, req_timeout);
 633         if (!resp)
 634             goto end;
 635 # else
 636         BIO_printf(bio_err,
 637                    "Error creating connect BIO - sockets not supported.\n");
 638         goto end;
 639 # endif
 640     } else if (respin) {
 641         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 642         if (derbio == NULL)
 643             goto end;
 644         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 645         BIO_free(derbio);
 646         if (!resp) {
 647             BIO_printf(bio_err, "Error reading OCSP response\n");
 648             goto end;
 649         }
 650     } else {
 651         ret = 0;
 652         goto end;
 653     }
 654
 655  done_resp:
 656
 657     if (respout) {
 658         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 659         if (derbio == NULL)
 660             goto end;
 661         i2d_OCSP_RESPONSE_bio(derbio, resp);
 662         BIO_free(derbio);
 663     }
 664
 665     i = OCSP_response_status(resp);
 666     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 667         BIO_printf(out, "Responder Error: %s (%d)\n",
 668                    OCSP_response_status_str(i), i);
 669         if (ignore_err)
 670             goto redo_accept;
 671         ret = 0;
 672         goto end;
 673     }
 674
 675     if (resp_text)
 676         OCSP_RESPONSE_print(out, resp, 0);
 677
 678     /* If running as responder don't verify our own response */
 679     if (cbio) {
 680         /* If not unlimited, see if we took all we should. */
 681         if (accept_count != -1 && --accept_count <= 0) {
 682             ret = 0;
 683             goto end;
 684         }
 685         BIO_free_all(cbio);
 686         cbio = NULL;
 687         OCSP_REQUEST_free(req);
 688         req = NULL;
 689         OCSP_RESPONSE_free(resp);
 690         resp = NULL;
 691         goto redo_accept;
 692     }
 693     if (ridx_filename) {
 694         ret = 0;
 695         goto end;
 696     }
 697
 698     if (!store) {
 699         store = setup_verify(CAfile, CApath, noCAfile, noCApath);
 700         if (!store)
 701             goto end;
 702     }
 703     if (vpmtouched)
 704         X509_STORE_set1_param(store, vpm);
 705     if (verify_certfile) {
 706         verify_other = load_certs(verify_certfile, FORMAT_PEM,
 707                                   NULL, NULL, "validator certificate");
 708         if (!verify_other)
 709             goto end;
 710     }
 711
 712     bs = OCSP_response_get1_basic(resp);
 713     if (!bs) {
 714         BIO_printf(bio_err, "Error parsing response\n");
 715         goto end;
 716     }
 717
 718     ret = 0;
 719
 720     if (!noverify) {
 721         if (req && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 722             if (i == -1)
 723                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 724             else {
 725                 BIO_printf(bio_err, "Nonce Verify error\n");
 726                 ret = 1;
 727                 goto end;
 728             }
 729         }
 730
 731         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 732         if (i <= 0 && issuers) {
 733             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 734             if (i > 0)
 735                 ERR_clear_error();
 736         }
 737         if (i <= 0) {
 738             BIO_printf(bio_err, "Response Verify Failure\n");
 739             ERR_print_errors(bio_err);
 740             ret = 1;
 741         } else
 742             BIO_printf(bio_err, "Response verify OK\n");
 743
 744     }
 745
 746     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 747
 748  end:
 749     ERR_print_errors(bio_err);
 750     X509_free(signer);
 751     X509_STORE_free(store);
 752     X509_VERIFY_PARAM_free(vpm);
 753     EVP_PKEY_free(key);
 754     EVP_PKEY_free(rkey);
 755     X509_free(cert);
 756     X509_free(rsigner);
 757     X509_free(rca_cert);
 758     free_index(rdb);
 759     BIO_free_all(cbio);
 760     BIO_free_all(acbio);
 761     BIO_free(out);
 762     OCSP_REQUEST_free(req);
 763     OCSP_RESPONSE_free(resp);
 764     OCSP_BASICRESP_free(bs);
 765     sk_OPENSSL_STRING_free(reqnames);
 766     sk_OCSP_CERTID_free(ids);
 767     sk_X509_pop_free(sign_other, X509_free);
 768     sk_X509_pop_free(verify_other, X509_free);
 769     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 770     OPENSSL_free(thost);
 771     OPENSSL_free(tport);
 772     OPENSSL_free(tpath);
 773
 774     return (ret);
 775 }
 776
 777 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
 778                          const EVP_MD *cert_id_md, X509 *issuer,
 779                          STACK_OF(OCSP_CERTID) *ids)
 780 {
 781     OCSP_CERTID *id;
 782     if (!issuer) {
 783         BIO_printf(bio_err, "No issuer certificate specified\n");
 784         return 0;
 785     }
 786     if (!*req)
 787         *req = OCSP_REQUEST_new();
 788     if (!*req)
 789         goto err;
 790     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
 791     if (!id || !sk_OCSP_CERTID_push(ids, id))
 792         goto err;
 793     if (!OCSP_request_add0_id(*req, id))
 794         goto err;
 795     return 1;
 796
 797  err:
 798     BIO_printf(bio_err, "Error Creating OCSP request\n");
 799     return 0;
 800 }
 801
 802 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
 803                            const EVP_MD *cert_id_md, X509 *issuer,
 804                            STACK_OF(OCSP_CERTID) *ids)
 805 {
 806     OCSP_CERTID *id;
 807     X509_NAME *iname;
 808     ASN1_BIT_STRING *ikey;
 809     ASN1_INTEGER *sno;
 810     if (!issuer) {
 811         BIO_printf(bio_err, "No issuer certificate specified\n");
 812         return 0;
 813     }
 814     if (!*req)
 815         *req = OCSP_REQUEST_new();
 816     if (!*req)
 817         goto err;
 818     iname = X509_get_subject_name(issuer);
 819     ikey = X509_get0_pubkey_bitstr(issuer);
 820     sno = s2i_ASN1_INTEGER(NULL, serial);
 821     if (!sno) {
 822         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
 823         return 0;
 824     }
 825     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
 826     ASN1_INTEGER_free(sno);
 827     if (!id || !sk_OCSP_CERTID_push(ids, id))
 828         goto err;
 829     if (!OCSP_request_add0_id(*req, id))
 830         goto err;
 831     return 1;
 832
 833  err:
 834     BIO_printf(bio_err, "Error Creating OCSP request\n");
 835     return 0;
 836 }
 837
 838 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
 839                               STACK_OF(OPENSSL_STRING) *names,
 840                               STACK_OF(OCSP_CERTID) *ids, long nsec,
 841                               long maxage)
 842 {
 843     OCSP_CERTID *id;
 844     char *name;
 845     int i, status, reason;
 846     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 847
 848     if (!bs || !req || !sk_OPENSSL_STRING_num(names)
 849         || !sk_OCSP_CERTID_num(ids))
 850         return;
 851
 852     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
 853         id = sk_OCSP_CERTID_value(ids, i);
 854         name = sk_OPENSSL_STRING_value(names, i);
 855         BIO_printf(out, "%s: ", name);
 856
 857         if (!OCSP_resp_find_status(bs, id, &status, &reason,
 858                                    &rev, &thisupd, &nextupd)) {
 859             BIO_puts(out, "ERROR: No Status found.\n");
 860             continue;
 861         }
 862
 863         /*
 864          * Check validity: if invalid write to output BIO so we know which
 865          * response this refers to.
 866          */
 867         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
 868             BIO_puts(out, "WARNING: Status times invalid.\n");
 869             ERR_print_errors(out);
 870         }
 871         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
 872
 873         BIO_puts(out, "\tThis Update: ");
 874         ASN1_GENERALIZEDTIME_print(out, thisupd);
 875         BIO_puts(out, "\n");
 876
 877         if (nextupd) {
 878             BIO_puts(out, "\tNext Update: ");
 879             ASN1_GENERALIZEDTIME_print(out, nextupd);
 880             BIO_puts(out, "\n");
 881         }
 882
 883         if (status != V_OCSP_CERTSTATUS_REVOKED)
 884             continue;
 885
 886         if (reason != -1)
 887             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
 888
 889         BIO_puts(out, "\tRevocation Time: ");
 890         ASN1_GENERALIZEDTIME_print(out, rev);
 891         BIO_puts(out, "\n");
 892     }
 893 }
 894
 895 static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
 896                               CA_DB *db, X509 *ca, X509 *rcert,
 897                               EVP_PKEY *rkey, const EVP_MD *rmd,
 898                               STACK_OF(X509) *rother, unsigned long flags,
 899                               int nmin, int ndays, int badsig)
 900 {
 901     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
 902     OCSP_CERTID *cid, *ca_id = NULL;
 903     OCSP_BASICRESP *bs = NULL;
 904     int i, id_count;
 905
 906     id_count = OCSP_request_onereq_count(req);
 907
 908     if (id_count <= 0) {
 909         *resp =
 910             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
 911         goto end;
 912     }
 913
 914     bs = OCSP_BASICRESP_new();
 915     thisupd = X509_gmtime_adj(NULL, 0);
 916     if (ndays != -1)
 917         nextupd = X509_gmtime_adj(NULL, nmin * 60 + ndays * 3600 * 24);
 918
 919     /* Examine each certificate id in the request */
 920     for (i = 0; i < id_count; i++) {
 921         OCSP_ONEREQ *one;
 922         ASN1_INTEGER *serial;
 923         char **inf;
 924         ASN1_OBJECT *cert_id_md_oid;
 925         const EVP_MD *cert_id_md;
 926         one = OCSP_request_onereq_get0(req, i);
 927         cid = OCSP_onereq_get0_id(one);
 928
 929         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
 930
 931         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
 932         if (!cert_id_md) {
 933             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
 934                                          NULL);
 935             goto end;
 936         }
 937         OCSP_CERTID_free(ca_id);
 938         ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
 939
 940         /* Is this request about our CA? */
 941         if (OCSP_id_issuer_cmp(ca_id, cid)) {
 942             OCSP_basic_add1_status(bs, cid,
 943                                    V_OCSP_CERTSTATUS_UNKNOWN,
 944                                    0, NULL, thisupd, nextupd);
 945             continue;
 946         }
 947         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
 948         inf = lookup_serial(db, serial);
 949         if (!inf)
 950             OCSP_basic_add1_status(bs, cid,
 951                                    V_OCSP_CERTSTATUS_UNKNOWN,
 952                                    0, NULL, thisupd, nextupd);
 953         else if (inf[DB_type][0] == DB_TYPE_VAL)
 954             OCSP_basic_add1_status(bs, cid,
 955                                    V_OCSP_CERTSTATUS_GOOD,
 956                                    0, NULL, thisupd, nextupd);
 957         else if (inf[DB_type][0] == DB_TYPE_REV) {
 958             ASN1_OBJECT *inst = NULL;
 959             ASN1_TIME *revtm = NULL;
 960             ASN1_GENERALIZEDTIME *invtm = NULL;
 961             OCSP_SINGLERESP *single;
 962             int reason = -1;
 963             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
 964             single = OCSP_basic_add1_status(bs, cid,
 965                                             V_OCSP_CERTSTATUS_REVOKED,
 966                                             reason, revtm, thisupd, nextupd);
 967             if (invtm)
 968                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
 969                                              invtm, 0, 0);
 970             else if (inst)
 971                 OCSP_SINGLERESP_add1_ext_i2d(single,
 972                                              NID_hold_instruction_code, inst,
 973                                              0, 0);
 974             ASN1_OBJECT_free(inst);
 975             ASN1_TIME_free(revtm);
 976             ASN1_GENERALIZEDTIME_free(invtm);
 977         }
 978     }
 979
 980     OCSP_copy_nonce(bs, req);
 981
 982     OCSP_basic_sign(bs, rcert, rkey, rmd, rother, flags);
 983
 984     if (badsig) {
 985         ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
 986         unsigned char *sigptr = ASN1_STRING_data(sig);
 987         sigptr[ASN1_STRING_length(sig) - 1] ^= 0x1;
 988     }
 989
 990     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
 991
 992  end:
 993     ASN1_TIME_free(thisupd);
 994     ASN1_TIME_free(nextupd);
 995     OCSP_CERTID_free(ca_id);
 996     OCSP_BASICRESP_free(bs);
 997 }
 998
 999 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1000 {
1001     int i;
1002     BIGNUM *bn = NULL;
1003     char *itmp, *row[DB_NUMBER], **rrow;
1004     for (i = 0; i < DB_NUMBER; i++)
1005         row[i] = NULL;
1006     bn = ASN1_INTEGER_to_BN(ser, NULL);
1007     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1008                                  * point and abort */
1009     if (BN_is_zero(bn))
1010         itmp = BUF_strdup("00");
1011     else
1012         itmp = BN_bn2hex(bn);
1013     row[DB_serial] = itmp;
1014     BN_free(bn);
1015     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1016     OPENSSL_free(itmp);
1017     return rrow;
1018 }
1019
1020 /* Quick and dirty OCSP server: read in and parse input request */
1021
1022 static BIO *init_responder(const char *port)
1023 {
1024     BIO *acbio = NULL, *bufbio = NULL;
1025
1026 # ifdef OPENSSL_NO_SOCK
1027     BIO_printf(bio_err,
1028                "Error setting up accept BIO - sockets not supported.\n");
1029     return NULL;
1030 # endif
1031     bufbio = BIO_new(BIO_f_buffer());
1032     if (!bufbio)
1033         goto err;
1034     acbio = BIO_new(BIO_s_accept());
1035     if (acbio == NULL
1036         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1037         || BIO_set_accept_port(acbio, port) < 0) {
1038         BIO_printf(bio_err, "Error setting up accept BIO\n");
1039         ERR_print_errors(bio_err);
1040         goto err;
1041     }
1042
1043     BIO_set_accept_bios(acbio, bufbio);
1044     bufbio = NULL;
1045     if (BIO_do_accept(acbio) <= 0) {
1046         BIO_printf(bio_err, "Error starting accept\n");
1047         ERR_print_errors(bio_err);
1048         goto err;
1049     }
1050
1051     return acbio;
1052
1053  err:
1054     BIO_free_all(acbio);
1055     BIO_free(bufbio);
1056     return NULL;
1057 }
1058
1059
1060 /*
1061  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1062  */
1063 static int urldecode(char *p)
1064 {
1065     unsigned char *out = (unsigned char *)p;
1066     unsigned char *save = out;
1067
1068     for (; *p; p++) {
1069         if (*p != '%')
1070             *out++ = *p;
1071         else if (isxdigit(p[1]) && isxdigit(p[2])) {
1072             *out++ = (app_hex(p[1]) << 4) | app_hex(p[2]);
1073             p += 2;
1074         }
1075         else
1076             return -1;
1077     }
1078     *out = '\0';
1079     return (int)(out - save);
1080 }
1081
1082 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1083                         const char *port)
1084 {
1085     int len;
1086     OCSP_REQUEST *req = NULL;
1087     char inbuf[2048], reqbuf[2048];
1088     char *p, *q;
1089     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1090
1091     if (BIO_do_accept(acbio) <= 0) {
1092         BIO_printf(bio_err, "Error accepting connection\n");
1093         ERR_print_errors(bio_err);
1094         return 0;
1095     }
1096
1097     cbio = BIO_pop(acbio);
1098     *pcbio = cbio;
1099
1100     /* Read the request line. */
1101     len = BIO_gets(cbio, reqbuf, sizeof reqbuf);
1102     if (len <= 0)
1103         return 1;
1104     if (strncmp(reqbuf, "GET ", 4) == 0) {
1105         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1106         for (p = reqbuf + 4; *p == ' '; ++p)
1107             continue;
1108         if (*p != '/') {
1109             BIO_printf(bio_err, "Invalid request -- bad URL\n");
1110             return 1;
1111         }
1112         p++;
1113
1114         /* Splice off the HTTP version identifier. */
1115         for (q = p; *q; q++)
1116             if (*q == ' ')
1117                 break;
1118         if (strncmp(q, " HTTP/1.", 8) != 0) {
1119             BIO_printf(bio_err, "Invalid request -- bad HTTP vesion\n");
1120             return 1;
1121         }
1122         *q = '\0';
1123         len = urldecode(p);
1124         if (len <= 0) {
1125             BIO_printf(bio_err, "Invalid request -- bad URL encoding\n");
1126             return 1;
1127         }
1128         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1129             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1130             BIO_printf(bio_err, "Could not allocate memory\n");
1131             ERR_print_errors(bio_err);
1132             return 1;
1133         }
1134         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1135         getbio = BIO_push(b64, getbio);
1136     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1137         BIO_printf(bio_err, "Invalid request -- bad HTTP verb\n");
1138         return 1;
1139     }
1140
1141     /* Read and skip past the headers. */
1142     for (;;) {
1143         len = BIO_gets(cbio, inbuf, sizeof inbuf);
1144         if (len <= 0)
1145             return 1;
1146         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1147             break;
1148     }
1149
1150     /* Try to read OCSP request */
1151     if (getbio) {
1152         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1153         BIO_free_all(getbio);
1154     } else
1155         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1156
1157     if (!req) {
1158         BIO_printf(bio_err, "Error parsing OCSP request\n");
1159         ERR_print_errors(bio_err);
1160     }
1161
1162     *preq = req;
1163
1164     return 1;
1165
1166 }
1167
1168 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1169 {
1170     char http_resp[] =
1171         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1172         "Content-Length: %d\r\n\r\n";
1173     if (!cbio)
1174         return 0;
1175     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1176     i2d_OCSP_RESPONSE_bio(cbio, resp);
1177     (void)BIO_flush(cbio);
1178     return 1;
1179 }
1180
1181 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *path,
1182                                       const STACK_OF(CONF_VALUE) *headers,
1183                                       OCSP_REQUEST *req, int req_timeout)
1184 {
1185     int fd;
1186     int rv;
1187     int i;
1188     OCSP_REQ_CTX *ctx = NULL;
1189     OCSP_RESPONSE *rsp = NULL;
1190     fd_set confds;
1191     struct timeval tv;
1192
1193     if (req_timeout != -1)
1194         BIO_set_nbio(cbio, 1);
1195
1196     rv = BIO_do_connect(cbio);
1197
1198     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1199         BIO_puts(bio_err, "Error connecting BIO\n");
1200         return NULL;
1201     }
1202
1203     if (BIO_get_fd(cbio, &fd) <= 0) {
1204         BIO_puts(bio_err, "Can't get connection fd\n");
1205         goto err;
1206     }
1207
1208     if (req_timeout != -1 && rv <= 0) {
1209         FD_ZERO(&confds);
1210         openssl_fdset(fd, &confds);
1211         tv.tv_usec = 0;
1212         tv.tv_sec = req_timeout;
1213         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1214         if (rv == 0) {
1215             BIO_puts(bio_err, "Timeout on connect\n");
1216             return NULL;
1217         }
1218     }
1219
1220     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1221     if (!ctx)
1222         return NULL;
1223
1224     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1225         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1226         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1227             goto err;
1228     }
1229
1230     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1231         goto err;
1232
1233     for (;;) {
1234         rv = OCSP_sendreq_nbio(&rsp, ctx);
1235         if (rv != -1)
1236             break;
1237         if (req_timeout == -1)
1238             continue;
1239         FD_ZERO(&confds);
1240         openssl_fdset(fd, &confds);
1241         tv.tv_usec = 0;
1242         tv.tv_sec = req_timeout;
1243         if (BIO_should_read(cbio))
1244             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1245         else if (BIO_should_write(cbio))
1246             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1247         else {
1248             BIO_puts(bio_err, "Unexpected retry condition\n");
1249             goto err;
1250         }
1251         if (rv == 0) {
1252             BIO_puts(bio_err, "Timeout on request\n");
1253             break;
1254         }
1255         if (rv == -1) {
1256             BIO_puts(bio_err, "Select error\n");
1257             break;
1258         }
1259
1260     }
1261  err:
1262     OCSP_REQ_CTX_free(ctx);
1263
1264     return rsp;
1265 }
1266
1267 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1268                                  const char *host, const char *path,
1269                                  const char *port, int use_ssl,
1270                                  STACK_OF(CONF_VALUE) *headers,
1271                                  int req_timeout)
1272 {
1273     BIO *cbio = NULL;
1274     SSL_CTX *ctx = NULL;
1275     OCSP_RESPONSE *resp = NULL;
1276     int found, i;
1277
1278     cbio = BIO_new_connect(host);
1279     if (!cbio) {
1280         BIO_printf(bio_err, "Error creating connect BIO\n");
1281         goto end;
1282     }
1283     if (port)
1284         BIO_set_conn_port(cbio, port);
1285     if (use_ssl == 1) {
1286         BIO *sbio;
1287         ctx = SSL_CTX_new(TLS_client_method());
1288         if (ctx == NULL) {
1289             BIO_printf(bio_err, "Error creating SSL context.\n");
1290             goto end;
1291         }
1292         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1293         sbio = BIO_new_ssl(ctx, 1);
1294         cbio = BIO_push(sbio, cbio);
1295     }
1296     for (found = i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1297        CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1298        if (strcasecmp("host", hdr->name) == 0) {
1299            found = 1;
1300            break;
1301        }
1302     }
1303
1304     if (!found && !X509V3_add_value("Host", host, &headers))
1305         BIO_printf(bio_err, "Error setting HTTP Host header\n");
1306
1307     resp = query_responder(cbio, path, headers, req, req_timeout);
1308     if (!resp)
1309         BIO_printf(bio_err, "Error querying OCSP responder\n");
1310  end:
1311     BIO_free_all(cbio);
1312     SSL_CTX_free(ctx);
1313     return resp;
1314 }
1315
1316 #endif