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 *host,
 122                                       const char *path,
 123                                       const STACK_OF(CONF_VALUE) *headers,
 124                                       OCSP_REQUEST *req, int req_timeout);
 125
 126 typedef enum OPTION_choice {
 127     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
 128     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
 129     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
 130     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
 131     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
 132     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
 133     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
 134     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
 135     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH,
 136     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
 137     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
 138     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
 139     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_HEADER,
 140     OPT_V_ENUM,
 141     OPT_MD
 142 } OPTION_CHOICE;
 143
 144 OPTIONS ocsp_options[] = {
 145     {"help", OPT_HELP, '-', "Display this summary"},
 146     {"out", OPT_OUTFILE, '>', "Output filename"},
 147     {"timeout", OPT_TIMEOUT, 'p'},
 148     {"url", OPT_URL, 's', "Responder URL"},
 149     {"host", OPT_HOST, 's', "host:prot top to connect to"},
 150     {"port", OPT_PORT, 'p', "Port to run responder on"},
 151     {"ignore_err", OPT_IGNORE_ERR, '-'},
 152     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 153     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 154     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 155     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 156      "Don't include any certificates in response"},
 157     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 158      "Identify reponse by signing certificate key ID"},
 159     {"no_certs", OPT_NO_CERTS, '-',
 160      "Don't include any certificates in signed request"},
 161     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 162      "Don't check signature on response"},
 163     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 164      "Don't check signing certificate"},
 165     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 166     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 167      "Don't do additional checks on signing certificate"},
 168     {"no_explicit", OPT_NO_EXPLICIT, '-'},
 169     {"trust_other", OPT_TRUST_OTHER, '-',
 170      "Don't verify additional certificates"},
 171     {"no_intern", OPT_NO_INTERN, '-',
 172      "Don't search certificates contained in response for signer"},
 173     {"badsig", OPT_BADSIG, '-'},
 174     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 175     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 176     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 177     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 178     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 179     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 180     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 181     {"sign_other", OPT_SIGN_OTHER, '<',
 182      "Additional certificates to include in signed request"},
 183     {"verify_other", OPT_VERIFY_OTHER, '<',
 184      "Additional certificates to search for signer"},
 185     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 186     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 187     {"no-CAfile", OPT_NOCAFILE, '-',
 188      "Do not load the default certificates file"},
 189     {"no-CApath", OPT_NOCAPATH, '-',
 190      "Do not load certificates from the default certificates directory"},
 191     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 192      "Maximum validity discrepancy in seconds"},
 193     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 194     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 195     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 196     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 197     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 198     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 199     {"cert", OPT_CERT, '<', "Certificate to check"},
 200     {"serial", OPT_SERIAL, 's', "Nerial number to check"},
 201     {"index", OPT_INDEX, '<', "Certificate status index file"},
 202     {"CA", OPT_CA, '<', "CA certificate"},
 203     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 204     {"nrequest", OPT_REQUEST, 'p',
 205      "Number of requests to accept (default unlimited)"},
 206     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 207     {"rsigner", OPT_RSIGNER, '<',
 208      "Sesponder certificate to sign responses with"},
 209     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 210     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 211     {"rmd", OPT_RMD, 's'},
 212     {"header", OPT_HEADER, 's', "key=value header to add"},
 213     {"", OPT_MD, '-', "Any supported digest"},
 214     OPT_V_OPTIONS,
 215     {NULL}
 216 };
 217
 218 int ocsp_main(int argc, char **argv)
 219 {
 220     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 221     const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 222     CA_DB *rdb = NULL;
 223     EVP_PKEY *key = NULL, *rkey = NULL;
 224     OCSP_BASICRESP *bs = NULL;
 225     OCSP_REQUEST *req = NULL;
 226     OCSP_RESPONSE *resp = NULL;
 227     STACK_OF(CONF_VALUE) *headers = NULL;
 228     STACK_OF(OCSP_CERTID) *ids = NULL;
 229     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 230     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 231     STACK_OF(X509) *issuers = NULL;
 232     X509 *issuer = NULL, *cert = NULL, *rca_cert = NULL;
 233     X509 *signer = NULL, *rsigner = NULL;
 234     X509_STORE *store = NULL;
 235     X509_VERIFY_PARAM *vpm = NULL;
 236     char *CAfile = NULL, *CApath = NULL, *header, *value;
 237     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 238     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 239     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 240     char *rsignfile = NULL, *rkeyfile = NULL;
 241     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 242     char *signfile = NULL, *keyfile = NULL;
 243     char *thost = NULL, *tport = NULL, *tpath = NULL;
 244     int noCAfile = 0, noCApath = 0;
 245     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 246     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 247     int req_text = 0, resp_text = 0, req_timeout = -1, ret = 1;
 248     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 249     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 250     OPTION_CHOICE o;
 251     char *prog;
 252
 253     reqnames = sk_OPENSSL_STRING_new_null();
 254     if (!reqnames)
 255         goto end;
 256     ids = sk_OCSP_CERTID_new_null();
 257     if (!ids)
 258         goto end;
 259     if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
 260         return 1;
 261
 262     prog = opt_init(argc, argv, ocsp_options);
 263     while ((o = opt_next()) != OPT_EOF) {
 264         switch (o) {
 265         case OPT_EOF:
 266         case OPT_ERR:
 267  opthelp:
 268             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 269             goto end;
 270         case OPT_HELP:
 271             ret = 0;
 272             opt_help(ocsp_options);
 273             goto end;
 274         case OPT_OUTFILE:
 275             outfile = opt_arg();
 276             break;
 277         case OPT_TIMEOUT:
 278             req_timeout = atoi(opt_arg());
 279             break;
 280         case OPT_URL:
 281             OPENSSL_free(thost);
 282             OPENSSL_free(tport);
 283             OPENSSL_free(tpath);
 284             thost = tport = tpath = NULL;
 285             if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
 286                 BIO_printf(bio_err, "%s Error parsing URL\n", prog);
 287                 goto end;
 288             }
 289             thost = host;
 290             tport = port;
 291             tpath = path;
 292             break;
 293         case OPT_HOST:
 294             host = opt_arg();
 295             break;
 296         case OPT_PORT:
 297             port = opt_arg();
 298             break;
 299         case OPT_IGNORE_ERR:
 300             ignore_err = 1;
 301             break;
 302         case OPT_NOVERIFY:
 303             noverify = 1;
 304             break;
 305         case OPT_NONCE:
 306             add_nonce = 2;
 307             break;
 308         case OPT_NO_NONCE:
 309             add_nonce = 0;
 310             break;
 311         case OPT_RESP_NO_CERTS:
 312             rflags |= OCSP_NOCERTS;
 313             break;
 314         case OPT_RESP_KEY_ID:
 315             rflags |= OCSP_RESPID_KEY;
 316             break;
 317         case OPT_NO_CERTS:
 318             sign_flags |= OCSP_NOCERTS;
 319             break;
 320         case OPT_NO_SIGNATURE_VERIFY:
 321             verify_flags |= OCSP_NOSIGS;
 322             break;
 323         case OPT_NO_CERT_VERIFY:
 324             verify_flags |= OCSP_NOVERIFY;
 325             break;
 326         case OPT_NO_CHAIN:
 327             verify_flags |= OCSP_NOCHAIN;
 328             break;
 329         case OPT_NO_CERT_CHECKS:
 330             verify_flags |= OCSP_NOCHECKS;
 331             break;
 332         case OPT_NO_EXPLICIT:
 333             verify_flags |= OCSP_NOEXPLICIT;
 334             break;
 335         case OPT_TRUST_OTHER:
 336             verify_flags |= OCSP_TRUSTOTHER;
 337             break;
 338         case OPT_NO_INTERN:
 339             verify_flags |= OCSP_NOINTERN;
 340             break;
 341         case OPT_BADSIG:
 342             badsig = 1;
 343             break;
 344         case OPT_TEXT:
 345             req_text = resp_text = 1;
 346             break;
 347         case OPT_REQ_TEXT:
 348             req_text = 1;
 349             break;
 350         case OPT_RESP_TEXT:
 351             resp_text = 1;
 352             break;
 353         case OPT_REQIN:
 354             reqin = opt_arg();
 355             break;
 356         case OPT_RESPIN:
 357             respin = opt_arg();
 358             break;
 359         case OPT_SIGNER:
 360             signfile = opt_arg();
 361             break;
 362         case OPT_VAFILE:
 363             verify_certfile = opt_arg();
 364             verify_flags |= OCSP_TRUSTOTHER;
 365             break;
 366         case OPT_SIGN_OTHER:
 367             sign_certfile = opt_arg();
 368             break;
 369         case OPT_VERIFY_OTHER:
 370             verify_certfile = opt_arg();
 371             break;
 372         case OPT_CAFILE:
 373             CAfile = opt_arg();
 374             break;
 375         case OPT_CAPATH:
 376             CApath = opt_arg();
 377             break;
 378         case OPT_NOCAFILE:
 379             noCAfile = 1;
 380             break;
 381         case OPT_NOCAPATH:
 382             noCApath = 1;
 383             break;
 384         case OPT_V_CASES:
 385             if (!opt_verify(o, vpm))
 386                 goto end;
 387             vpmtouched++;
 388             break;
 389         case OPT_VALIDITY_PERIOD:
 390             opt_long(opt_arg(), &nsec);
 391             break;
 392         case OPT_STATUS_AGE:
 393             opt_long(opt_arg(), &maxage);
 394             break;
 395         case OPT_SIGNKEY:
 396             keyfile = opt_arg();
 397             break;
 398         case OPT_REQOUT:
 399             reqout = opt_arg();
 400             break;
 401         case OPT_RESPOUT:
 402             respout = opt_arg();
 403             break;
 404         case OPT_PATH:
 405             path = opt_arg();
 406             break;
 407         case OPT_ISSUER:
 408             issuer = load_cert(opt_arg(), FORMAT_PEM,
 409                                NULL, NULL, "issuer certificate");
 410             if (issuer == NULL)
 411                 goto end;
 412             if (issuers == NULL) {
 413                 if ((issuers = sk_X509_new_null()) == NULL)
 414                     goto end;
 415             }
 416             sk_X509_push(issuers, issuer);
 417             break;
 418         case OPT_CERT:
 419             X509_free(cert);
 420             cert = load_cert(opt_arg(), FORMAT_PEM,
 421                              NULL, NULL, "certificate");
 422             if (cert == NULL)
 423                 goto end;
 424             if (cert_id_md == NULL)
 425                 cert_id_md = EVP_sha1();
 426             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 427                 goto end;
 428             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 429                 goto end;
 430             break;
 431         case OPT_SERIAL:
 432             if (cert_id_md == NULL)
 433                 cert_id_md = EVP_sha1();
 434             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 435                 goto end;
 436             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 437                 goto end;
 438             break;
 439         case OPT_INDEX:
 440             ridx_filename = opt_arg();
 441             break;
 442         case OPT_CA:
 443             rca_filename = opt_arg();
 444             break;
 445         case OPT_NMIN:
 446             opt_int(opt_arg(), &nmin);
 447             if (ndays == -1)
 448                 ndays = 0;
 449             break;
 450         case OPT_REQUEST:
 451             opt_int(opt_arg(), &accept_count);
 452             break;
 453         case OPT_NDAYS:
 454             ndays = atoi(opt_arg());
 455             break;
 456         case OPT_RSIGNER:
 457             rsignfile = opt_arg();
 458             break;
 459         case OPT_RKEY:
 460             rkeyfile = opt_arg();
 461             break;
 462         case OPT_ROTHER:
 463             rcertfile = opt_arg();
 464             break;
 465         case OPT_RMD:
 466             if (!opt_md(opt_arg(), &rsign_md))
 467                 goto end;
 468             break;
 469         case OPT_HEADER:
 470             header = opt_arg();
 471             value = strchr(header, '=');
 472             if (value == NULL) {
 473                 BIO_printf(bio_err, "Missing = in header key=value\n");
 474                 goto opthelp;
 475             }
 476             *value++ = '\0';
 477             if (!X509V3_add_value(header, value, &headers))
 478                 goto end;
 479             break;
 480         case OPT_MD:
 481             if (cert_id_md != NULL) {
 482                 BIO_printf(bio_err,
 483                            "%s: Digest must be before -cert or -serial\n",
 484                            prog);
 485                 goto opthelp;
 486             }
 487             if (!opt_md(opt_unknown(), &cert_id_md))
 488                 goto opthelp;
 489             break;
 490         }
 491     }
 492     argc = opt_num_rest();
 493     argv = opt_rest();
 494
 495     /* Have we anything to do? */
 496     if (!req && !reqin && !respin && !(port && ridx_filename))
 497         goto opthelp;
 498
 499     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 500     if (out == NULL)
 501         goto end;
 502
 503     if (!req && (add_nonce != 2))
 504         add_nonce = 0;
 505
 506     if (!req && reqin) {
 507         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 508         if (derbio == NULL)
 509             goto end;
 510         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 511         BIO_free(derbio);
 512         if (!req) {
 513             BIO_printf(bio_err, "Error reading OCSP request\n");
 514             goto end;
 515         }
 516     }
 517
 518     if (!req && port) {
 519         acbio = init_responder(port);
 520         if (!acbio)
 521             goto end;
 522     }
 523
 524     if (rsignfile && !rdb) {
 525         if (!rkeyfile)
 526             rkeyfile = rsignfile;
 527         rsigner = load_cert(rsignfile, FORMAT_PEM,
 528                             NULL, NULL, "responder certificate");
 529         if (!rsigner) {
 530             BIO_printf(bio_err, "Error loading responder certificate\n");
 531             goto end;
 532         }
 533         rca_cert = load_cert(rca_filename, FORMAT_PEM,
 534                              NULL, NULL, "CA certificate");
 535         if (rcertfile) {
 536             if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL, NULL,
 537                             "responder other certificates"))
 538                 goto end;
 539         }
 540         rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, NULL,
 541                         "responder private key");
 542         if (!rkey)
 543             goto end;
 544     }
 545     if (acbio)
 546         BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
 547
 548  redo_accept:
 549
 550     if (acbio) {
 551         if (!do_responder(&req, &cbio, acbio, port))
 552             goto end;
 553         if (!req) {
 554             resp =
 555                 OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 556                                      NULL);
 557             send_ocsp_response(cbio, resp);
 558             goto done_resp;
 559         }
 560     }
 561
 562     if (!req && (signfile || reqout || host || add_nonce || ridx_filename)) {
 563         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 564         goto end;
 565     }
 566
 567     if (req && add_nonce)
 568         OCSP_request_add1_nonce(req, NULL, -1);
 569
 570     if (signfile) {
 571         if (!keyfile)
 572             keyfile = signfile;
 573         signer = load_cert(signfile, FORMAT_PEM,
 574                            NULL, NULL, "signer certificate");
 575         if (!signer) {
 576             BIO_printf(bio_err, "Error loading signer certificate\n");
 577             goto end;
 578         }
 579         if (sign_certfile) {
 580             if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL, NULL,
 581                             "signer certificates"))
 582                 goto end;
 583         }
 584         key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
 585                        "signer private key");
 586         if (!key)
 587             goto end;
 588
 589         if (!OCSP_request_sign
 590             (req, signer, key, NULL, sign_other, sign_flags)) {
 591             BIO_printf(bio_err, "Error signing OCSP request\n");
 592             goto end;
 593         }
 594     }
 595
 596     if (req_text && req)
 597         OCSP_REQUEST_print(out, req, 0);
 598
 599     if (reqout) {
 600         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 601         if (derbio == NULL)
 602             goto end;
 603         i2d_OCSP_REQUEST_bio(derbio, req);
 604         BIO_free(derbio);
 605     }
 606
 607     if (ridx_filename && (!rkey || !rsigner || !rca_cert)) {
 608         BIO_printf(bio_err,
 609                    "Need a responder certificate, key and CA for this operation!\n");
 610         goto end;
 611     }
 612
 613     if (ridx_filename && !rdb) {
 614         rdb = load_index(ridx_filename, NULL);
 615         if (!rdb)
 616             goto end;
 617         if (!index_index(rdb))
 618             goto end;
 619     }
 620
 621     if (rdb) {
 622         make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey,
 623                                rsign_md, rother, rflags, nmin, ndays, badsig);
 624         if (cbio)
 625             send_ocsp_response(cbio, resp);
 626     } else if (host) {
 627 # ifndef OPENSSL_NO_SOCK
 628         resp = process_responder(req, host, path,
 629                                  port, use_ssl, headers, req_timeout);
 630         if (!resp)
 631             goto end;
 632 # else
 633         BIO_printf(bio_err,
 634                    "Error creating connect BIO - sockets not supported.\n");
 635         goto end;
 636 # endif
 637     } else if (respin) {
 638         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 639         if (derbio == NULL)
 640             goto end;
 641         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 642         BIO_free(derbio);
 643         if (!resp) {
 644             BIO_printf(bio_err, "Error reading OCSP response\n");
 645             goto end;
 646         }
 647     } else {
 648         ret = 0;
 649         goto end;
 650     }
 651
 652  done_resp:
 653
 654     if (respout) {
 655         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 656         if (derbio == NULL)
 657             goto end;
 658         i2d_OCSP_RESPONSE_bio(derbio, resp);
 659         BIO_free(derbio);
 660     }
 661
 662     i = OCSP_response_status(resp);
 663     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 664         BIO_printf(out, "Responder Error: %s (%d)\n",
 665                    OCSP_response_status_str(i), i);
 666         if (ignore_err)
 667             goto redo_accept;
 668         ret = 0;
 669         goto end;
 670     }
 671
 672     if (resp_text)
 673         OCSP_RESPONSE_print(out, resp, 0);
 674
 675     /* If running as responder don't verify our own response */
 676     if (cbio) {
 677         /* If not unlimited, see if we took all we should. */
 678         if (accept_count != -1 && --accept_count <= 0) {
 679             ret = 0;
 680             goto end;
 681         }
 682         BIO_free_all(cbio);
 683         cbio = NULL;
 684         OCSP_REQUEST_free(req);
 685         req = NULL;
 686         OCSP_RESPONSE_free(resp);
 687         resp = NULL;
 688         goto redo_accept;
 689     }
 690     if (ridx_filename) {
 691         ret = 0;
 692         goto end;
 693     }
 694
 695     if (!store) {
 696         store = setup_verify(CAfile, CApath, noCAfile, noCApath);
 697         if (!store)
 698             goto end;
 699     }
 700     if (vpmtouched)
 701         X509_STORE_set1_param(store, vpm);
 702     if (verify_certfile) {
 703         if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL, NULL,
 704                         "validator certificate"))
 705             goto end;
 706     }
 707
 708     bs = OCSP_response_get1_basic(resp);
 709     if (!bs) {
 710         BIO_printf(bio_err, "Error parsing response\n");
 711         goto end;
 712     }
 713
 714     ret = 0;
 715
 716     if (!noverify) {
 717         if (req && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 718             if (i == -1)
 719                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 720             else {
 721                 BIO_printf(bio_err, "Nonce Verify error\n");
 722                 ret = 1;
 723                 goto end;
 724             }
 725         }
 726
 727         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 728         if (i <= 0 && issuers) {
 729             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 730             if (i > 0)
 731                 ERR_clear_error();
 732         }
 733         if (i <= 0) {
 734             BIO_printf(bio_err, "Response Verify Failure\n");
 735             ERR_print_errors(bio_err);
 736             ret = 1;
 737         } else
 738             BIO_printf(bio_err, "Response verify OK\n");
 739
 740     }
 741
 742     print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
 743
 744  end:
 745     ERR_print_errors(bio_err);
 746     X509_free(signer);
 747     X509_STORE_free(store);
 748     X509_VERIFY_PARAM_free(vpm);
 749     EVP_PKEY_free(key);
 750     EVP_PKEY_free(rkey);
 751     X509_free(cert);
 752     sk_X509_pop_free(issuers, X509_free);
 753     X509_free(rsigner);
 754     X509_free(rca_cert);
 755     free_index(rdb);
 756     BIO_free_all(cbio);
 757     BIO_free_all(acbio);
 758     BIO_free(out);
 759     OCSP_REQUEST_free(req);
 760     OCSP_RESPONSE_free(resp);
 761     OCSP_BASICRESP_free(bs);
 762     sk_OPENSSL_STRING_free(reqnames);
 763     sk_OCSP_CERTID_free(ids);
 764     sk_X509_pop_free(sign_other, X509_free);
 765     sk_X509_pop_free(verify_other, X509_free);
 766     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 767     OPENSSL_free(thost);
 768     OPENSSL_free(tport);
 769     OPENSSL_free(tpath);
 770
 771     return (ret);
 772 }
 773
 774 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
 775                          const EVP_MD *cert_id_md, X509 *issuer,
 776                          STACK_OF(OCSP_CERTID) *ids)
 777 {
 778     OCSP_CERTID *id;
 779     if (!issuer) {
 780         BIO_printf(bio_err, "No issuer certificate specified\n");
 781         return 0;
 782     }
 783     if (*req == NULL)
 784         *req = OCSP_REQUEST_new();
 785     if (*req == NULL)
 786         goto err;
 787     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
 788     if (!id || !sk_OCSP_CERTID_push(ids, id))
 789         goto err;
 790     if (!OCSP_request_add0_id(*req, id))
 791         goto err;
 792     return 1;
 793
 794  err:
 795     BIO_printf(bio_err, "Error Creating OCSP request\n");
 796     return 0;
 797 }
 798
 799 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
 800                            const EVP_MD *cert_id_md, X509 *issuer,
 801                            STACK_OF(OCSP_CERTID) *ids)
 802 {
 803     OCSP_CERTID *id;
 804     X509_NAME *iname;
 805     ASN1_BIT_STRING *ikey;
 806     ASN1_INTEGER *sno;
 807     if (!issuer) {
 808         BIO_printf(bio_err, "No issuer certificate specified\n");
 809         return 0;
 810     }
 811     if (*req == NULL)
 812         *req = OCSP_REQUEST_new();
 813     if (*req == NULL)
 814         goto err;
 815     iname = X509_get_subject_name(issuer);
 816     ikey = X509_get0_pubkey_bitstr(issuer);
 817     sno = s2i_ASN1_INTEGER(NULL, serial);
 818     if (!sno) {
 819         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
 820         return 0;
 821     }
 822     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
 823     ASN1_INTEGER_free(sno);
 824     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
 825         goto err;
 826     if (!OCSP_request_add0_id(*req, id))
 827         goto err;
 828     return 1;
 829
 830  err:
 831     BIO_printf(bio_err, "Error Creating OCSP request\n");
 832     return 0;
 833 }
 834
 835 static void print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
 836                               STACK_OF(OPENSSL_STRING) *names,
 837                               STACK_OF(OCSP_CERTID) *ids, long nsec,
 838                               long maxage)
 839 {
 840     OCSP_CERTID *id;
 841     char *name;
 842     int i, status, reason;
 843     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 844
 845     if (!bs || !req || !sk_OPENSSL_STRING_num(names)
 846         || !sk_OCSP_CERTID_num(ids))
 847         return;
 848
 849     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
 850         id = sk_OCSP_CERTID_value(ids, i);
 851         name = sk_OPENSSL_STRING_value(names, i);
 852         BIO_printf(out, "%s: ", name);
 853
 854         if (!OCSP_resp_find_status(bs, id, &status, &reason,
 855                                    &rev, &thisupd, &nextupd)) {
 856             BIO_puts(out, "ERROR: No Status found.\n");
 857             continue;
 858         }
 859
 860         /*
 861          * Check validity: if invalid write to output BIO so we know which
 862          * response this refers to.
 863          */
 864         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
 865             BIO_puts(out, "WARNING: Status times invalid.\n");
 866             ERR_print_errors(out);
 867         }
 868         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
 869
 870         BIO_puts(out, "\tThis Update: ");
 871         ASN1_GENERALIZEDTIME_print(out, thisupd);
 872         BIO_puts(out, "\n");
 873
 874         if (nextupd) {
 875             BIO_puts(out, "\tNext Update: ");
 876             ASN1_GENERALIZEDTIME_print(out, nextupd);
 877             BIO_puts(out, "\n");
 878         }
 879
 880         if (status != V_OCSP_CERTSTATUS_REVOKED)
 881             continue;
 882
 883         if (reason != -1)
 884             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
 885
 886         BIO_puts(out, "\tRevocation Time: ");
 887         ASN1_GENERALIZEDTIME_print(out, rev);
 888         BIO_puts(out, "\n");
 889     }
 890 }
 891
 892 static void make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
 893                               CA_DB *db, X509 *ca, X509 *rcert,
 894                               EVP_PKEY *rkey, const EVP_MD *rmd,
 895                               STACK_OF(X509) *rother, unsigned long flags,
 896                               int nmin, int ndays, int badsig)
 897 {
 898     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
 899     OCSP_CERTID *cid, *ca_id = NULL;
 900     OCSP_BASICRESP *bs = NULL;
 901     int i, id_count;
 902
 903     id_count = OCSP_request_onereq_count(req);
 904
 905     if (id_count <= 0) {
 906         *resp =
 907             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
 908         goto end;
 909     }
 910
 911     bs = OCSP_BASICRESP_new();
 912     thisupd = X509_gmtime_adj(NULL, 0);
 913     if (ndays != -1)
 914         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
 915
 916     /* Examine each certificate id in the request */
 917     for (i = 0; i < id_count; i++) {
 918         OCSP_ONEREQ *one;
 919         ASN1_INTEGER *serial;
 920         char **inf;
 921         ASN1_OBJECT *cert_id_md_oid;
 922         const EVP_MD *cert_id_md;
 923         one = OCSP_request_onereq_get0(req, i);
 924         cid = OCSP_onereq_get0_id(one);
 925
 926         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
 927
 928         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
 929         if (!cert_id_md) {
 930             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
 931                                          NULL);
 932             goto end;
 933         }
 934         OCSP_CERTID_free(ca_id);
 935         ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
 936
 937         /* Is this request about our CA? */
 938         if (OCSP_id_issuer_cmp(ca_id, cid)) {
 939             OCSP_basic_add1_status(bs, cid,
 940                                    V_OCSP_CERTSTATUS_UNKNOWN,
 941                                    0, NULL, thisupd, nextupd);
 942             continue;
 943         }
 944         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
 945         inf = lookup_serial(db, serial);
 946         if (!inf)
 947             OCSP_basic_add1_status(bs, cid,
 948                                    V_OCSP_CERTSTATUS_UNKNOWN,
 949                                    0, NULL, thisupd, nextupd);
 950         else if (inf[DB_type][0] == DB_TYPE_VAL)
 951             OCSP_basic_add1_status(bs, cid,
 952                                    V_OCSP_CERTSTATUS_GOOD,
 953                                    0, NULL, thisupd, nextupd);
 954         else if (inf[DB_type][0] == DB_TYPE_REV) {
 955             ASN1_OBJECT *inst = NULL;
 956             ASN1_TIME *revtm = NULL;
 957             ASN1_GENERALIZEDTIME *invtm = NULL;
 958             OCSP_SINGLERESP *single;
 959             int reason = -1;
 960             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
 961             single = OCSP_basic_add1_status(bs, cid,
 962                                             V_OCSP_CERTSTATUS_REVOKED,
 963                                             reason, revtm, thisupd, nextupd);
 964             if (invtm)
 965                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
 966                                              invtm, 0, 0);
 967             else if (inst)
 968                 OCSP_SINGLERESP_add1_ext_i2d(single,
 969                                              NID_hold_instruction_code, inst,
 970                                              0, 0);
 971             ASN1_OBJECT_free(inst);
 972             ASN1_TIME_free(revtm);
 973             ASN1_GENERALIZEDTIME_free(invtm);
 974         }
 975     }
 976
 977     OCSP_copy_nonce(bs, req);
 978
 979     OCSP_basic_sign(bs, rcert, rkey, rmd, rother, flags);
 980
 981     if (badsig) {
 982         ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
 983         unsigned char *sigptr = ASN1_STRING_data(sig);
 984         sigptr[ASN1_STRING_length(sig) - 1] ^= 0x1;
 985     }
 986
 987     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
 988
 989  end:
 990     ASN1_TIME_free(thisupd);
 991     ASN1_TIME_free(nextupd);
 992     OCSP_CERTID_free(ca_id);
 993     OCSP_BASICRESP_free(bs);
 994 }
 995
 996 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
 997 {
 998     int i;
 999     BIGNUM *bn = NULL;
1000     char *itmp, *row[DB_NUMBER], **rrow;
1001     for (i = 0; i < DB_NUMBER; i++)
1002         row[i] = NULL;
1003     bn = ASN1_INTEGER_to_BN(ser, NULL);
1004     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1005                                  * point and abort */
1006     if (BN_is_zero(bn))
1007         itmp = OPENSSL_strdup("00");
1008     else
1009         itmp = BN_bn2hex(bn);
1010     row[DB_serial] = itmp;
1011     BN_free(bn);
1012     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1013     OPENSSL_free(itmp);
1014     return rrow;
1015 }
1016
1017 /* Quick and dirty OCSP server: read in and parse input request */
1018
1019 static BIO *init_responder(const char *port)
1020 {
1021     BIO *acbio = NULL, *bufbio = NULL;
1022
1023 # ifdef OPENSSL_NO_SOCK
1024     BIO_printf(bio_err,
1025                "Error setting up accept BIO - sockets not supported.\n");
1026     return NULL;
1027 # endif
1028     bufbio = BIO_new(BIO_f_buffer());
1029     if (bufbio == NULL)
1030         goto err;
1031     acbio = BIO_new(BIO_s_accept());
1032     if (acbio == NULL
1033         || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
1034         || BIO_set_accept_port(acbio, port) < 0) {
1035         BIO_printf(bio_err, "Error setting up accept BIO\n");
1036         ERR_print_errors(bio_err);
1037         goto err;
1038     }
1039
1040     BIO_set_accept_bios(acbio, bufbio);
1041     bufbio = NULL;
1042     if (BIO_do_accept(acbio) <= 0) {
1043         BIO_printf(bio_err, "Error starting accept\n");
1044         ERR_print_errors(bio_err);
1045         goto err;
1046     }
1047
1048     return acbio;
1049
1050  err:
1051     BIO_free_all(acbio);
1052     BIO_free(bufbio);
1053     return NULL;
1054 }
1055
1056
1057 /*
1058  * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
1059  */
1060 static int urldecode(char *p)
1061 {
1062     unsigned char *out = (unsigned char *)p;
1063     unsigned char *save = out;
1064
1065     for (; *p; p++) {
1066         if (*p != '%')
1067             *out++ = *p;
1068         else if (isxdigit(p[1]) && isxdigit(p[2])) {
1069             *out++ = (app_hex(p[1]) << 4) | app_hex(p[2]);
1070             p += 2;
1071         }
1072         else
1073             return -1;
1074     }
1075     *out = '\0';
1076     return (int)(out - save);
1077 }
1078
1079 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1080                         const char *port)
1081 {
1082     int len;
1083     OCSP_REQUEST *req = NULL;
1084     char inbuf[2048], reqbuf[2048];
1085     char *p, *q;
1086     BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
1087
1088     if (BIO_do_accept(acbio) <= 0) {
1089         BIO_printf(bio_err, "Error accepting connection\n");
1090         ERR_print_errors(bio_err);
1091         return 0;
1092     }
1093
1094     cbio = BIO_pop(acbio);
1095     *pcbio = cbio;
1096
1097     /* Read the request line. */
1098     len = BIO_gets(cbio, reqbuf, sizeof reqbuf);
1099     if (len <= 0)
1100         return 1;
1101     if (strncmp(reqbuf, "GET ", 4) == 0) {
1102         /* Expecting GET {sp} /URL {sp} HTTP/1.x */
1103         for (p = reqbuf + 4; *p == ' '; ++p)
1104             continue;
1105         if (*p != '/') {
1106             BIO_printf(bio_err, "Invalid request -- bad URL\n");
1107             return 1;
1108         }
1109         p++;
1110
1111         /* Splice off the HTTP version identifier. */
1112         for (q = p; *q; q++)
1113             if (*q == ' ')
1114                 break;
1115         if (strncmp(q, " HTTP/1.", 8) != 0) {
1116             BIO_printf(bio_err, "Invalid request -- bad HTTP vesion\n");
1117             return 1;
1118         }
1119         *q = '\0';
1120         len = urldecode(p);
1121         if (len <= 0) {
1122             BIO_printf(bio_err, "Invalid request -- bad URL encoding\n");
1123             return 1;
1124         }
1125         if ((getbio = BIO_new_mem_buf(p, len)) == NULL
1126             || (b64 = BIO_new(BIO_f_base64())) == NULL) {
1127             BIO_printf(bio_err, "Could not allocate memory\n");
1128             ERR_print_errors(bio_err);
1129             return 1;
1130         }
1131         BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
1132         getbio = BIO_push(b64, getbio);
1133     } else if (strncmp(reqbuf, "POST ", 5) != 0) {
1134         BIO_printf(bio_err, "Invalid request -- bad HTTP verb\n");
1135         return 1;
1136     }
1137
1138     /* Read and skip past the headers. */
1139     for (;;) {
1140         len = BIO_gets(cbio, inbuf, sizeof inbuf);
1141         if (len <= 0)
1142             return 1;
1143         if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
1144             break;
1145     }
1146
1147     /* Try to read OCSP request */
1148     if (getbio) {
1149         req = d2i_OCSP_REQUEST_bio(getbio, NULL);
1150         BIO_free_all(getbio);
1151     } else
1152         req = d2i_OCSP_REQUEST_bio(cbio, NULL);
1153
1154     if (!req) {
1155         BIO_printf(bio_err, "Error parsing OCSP request\n");
1156         ERR_print_errors(bio_err);
1157     }
1158
1159     *preq = req;
1160
1161     return 1;
1162
1163 }
1164
1165 static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
1166 {
1167     char http_resp[] =
1168         "HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
1169         "Content-Length: %d\r\n\r\n";
1170     if (!cbio)
1171         return 0;
1172     BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
1173     i2d_OCSP_RESPONSE_bio(cbio, resp);
1174     (void)BIO_flush(cbio);
1175     return 1;
1176 }
1177
1178 static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
1179                                       const char *path,
1180                                       const STACK_OF(CONF_VALUE) *headers,
1181                                       OCSP_REQUEST *req, int req_timeout)
1182 {
1183     int fd;
1184     int rv;
1185     int i;
1186     int add_host = 1;
1187     OCSP_REQ_CTX *ctx = NULL;
1188     OCSP_RESPONSE *rsp = NULL;
1189     fd_set confds;
1190     struct timeval tv;
1191
1192     if (req_timeout != -1)
1193         BIO_set_nbio(cbio, 1);
1194
1195     rv = BIO_do_connect(cbio);
1196
1197     if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
1198         BIO_puts(bio_err, "Error connecting BIO\n");
1199         return NULL;
1200     }
1201
1202     if (BIO_get_fd(cbio, &fd) < 0) {
1203         BIO_puts(bio_err, "Can't get connection fd\n");
1204         goto err;
1205     }
1206
1207     if (req_timeout != -1 && rv <= 0) {
1208         FD_ZERO(&confds);
1209         openssl_fdset(fd, &confds);
1210         tv.tv_usec = 0;
1211         tv.tv_sec = req_timeout;
1212         rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1213         if (rv == 0) {
1214             BIO_puts(bio_err, "Timeout on connect\n");
1215             return NULL;
1216         }
1217     }
1218
1219     ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1220     if (ctx == NULL)
1221         return NULL;
1222
1223     for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
1224         CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
1225         if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
1226             add_host = 0;
1227         if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
1228             goto err;
1229     }
1230
1231     if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
1232         goto err;
1233
1234     if (!OCSP_REQ_CTX_set1_req(ctx, req))
1235         goto err;
1236
1237     for (;;) {
1238         rv = OCSP_sendreq_nbio(&rsp, ctx);
1239         if (rv != -1)
1240             break;
1241         if (req_timeout == -1)
1242             continue;
1243         FD_ZERO(&confds);
1244         openssl_fdset(fd, &confds);
1245         tv.tv_usec = 0;
1246         tv.tv_sec = req_timeout;
1247         if (BIO_should_read(cbio))
1248             rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
1249         else if (BIO_should_write(cbio))
1250             rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
1251         else {
1252             BIO_puts(bio_err, "Unexpected retry condition\n");
1253             goto err;
1254         }
1255         if (rv == 0) {
1256             BIO_puts(bio_err, "Timeout on request\n");
1257             break;
1258         }
1259         if (rv == -1) {
1260             BIO_puts(bio_err, "Select error\n");
1261             break;
1262         }
1263
1264     }
1265  err:
1266     OCSP_REQ_CTX_free(ctx);
1267
1268     return rsp;
1269 }
1270
1271 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
1272                                  const char *host, const char *path,
1273                                  const char *port, int use_ssl,
1274                                  STACK_OF(CONF_VALUE) *headers,
1275                                  int req_timeout)
1276 {
1277     BIO *cbio = NULL;
1278     SSL_CTX *ctx = NULL;
1279     OCSP_RESPONSE *resp = NULL;
1280
1281     cbio = BIO_new_connect(host);
1282     if (!cbio) {
1283         BIO_printf(bio_err, "Error creating connect BIO\n");
1284         goto end;
1285     }
1286     if (port)
1287         BIO_set_conn_port(cbio, port);
1288     if (use_ssl == 1) {
1289         BIO *sbio;
1290         ctx = SSL_CTX_new(TLS_client_method());
1291         if (ctx == NULL) {
1292             BIO_printf(bio_err, "Error creating SSL context.\n");
1293             goto end;
1294         }
1295         SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
1296         sbio = BIO_new_ssl(ctx, 1);
1297         cbio = BIO_push(sbio, cbio);
1298     }
1299
1300     resp = query_responder(cbio, host, path, headers, req, req_timeout);
1301     if (!resp)
1302         BIO_printf(bio_err, "Error querying OCSP responder\n");
1303  end:
1304     BIO_free_all(cbio);
1305     SSL_CTX_free(ctx);
1306     return resp;
1307 }
1308
1309 #endif