apps/ocsp.c

   1 /*
   2  * Copyright 2001-2023 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/opensslconf.h>
  11
  12 #ifdef OPENSSL_SYS_VMS
  13   /* So fd_set and friends get properly defined on OpenVMS */
  14 # define _XOPEN_SOURCE_EXTENDED
  15 #endif
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <time.h>
  21 #include <ctype.h>
  22
  23 /* Needs to be included before the openssl headers */
  24 #include "apps.h"
  25 #include "http_server.h"
  26 #include "progs.h"
  27 #include "internal/sockets.h"
  28 #include <openssl/e_os2.h>
  29 #include <openssl/crypto.h>
  30 #include <openssl/err.h>
  31 #include <openssl/ssl.h>
  32 #include <openssl/evp.h>
  33 #include <openssl/bn.h>
  34 #include <openssl/x509v3.h>
  35
  36 #if defined(OPENSSL_SYS_VXWORKS)
  37 /* not supported */
  38 int setpgid(pid_t pid, pid_t pgid)
  39 {
  40     errno = ENOSYS;
  41     return 0;
  42 }
  43 /* not supported */
  44 pid_t fork(void)
  45 {
  46     errno = ENOSYS;
  47     return (pid_t) -1;
  48 }
  49 #endif
  50 /* Maximum leeway in validity period: default 5 minutes */
  51 #define MAX_VALIDITY_PERIOD    (5 * 60)
  52
  53 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
  54                          const EVP_MD *cert_id_md, X509 *issuer,
  55                          STACK_OF(OCSP_CERTID) *ids);
  56 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
  57                            const EVP_MD *cert_id_md, X509 *issuer,
  58                            STACK_OF(OCSP_CERTID) *ids);
  59 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
  60                               STACK_OF(OPENSSL_STRING) *names,
  61                               STACK_OF(OCSP_CERTID) *ids, long nsec,
  62                               long maxage);
  63 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
  64                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
  65                               EVP_PKEY *rkey, const EVP_MD *md,
  66                               STACK_OF(OPENSSL_STRING) *sigopts,
  67                               STACK_OF(X509) *rother, unsigned long flags,
  68                               int nmin, int ndays, int badsig,
  69                               const EVP_MD *resp_md);
  70
  71 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
  72 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
  73                         int timeout);
  74 static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp);
  75 static char *prog;
  76
  77 #ifdef HTTP_DAEMON
  78 static int index_changed(CA_DB *);
  79 #endif
  80
  81 typedef enum OPTION_choice {
  82     OPT_COMMON,
  83     OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
  84 #ifndef OPENSSL_NO_SOCK
  85     OPT_PROXY, OPT_NO_PROXY,
  86 #endif
  87     OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
  88     OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
  89     OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
  90     OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
  91     OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
  92     OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
  93     OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
  94     OPT_NOCAPATH, OPT_NOCASTORE,
  95     OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
  96     OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
  97     OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
  98     OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
  99     OPT_PASSIN,
 100     OPT_RCID,
 101     OPT_V_ENUM,
 102     OPT_MD,
 103     OPT_MULTI, OPT_PROV_ENUM
 104 } OPTION_CHOICE;
 105
 106 const OPTIONS ocsp_options[] = {
 107     OPT_SECTION("General"),
 108     {"help", OPT_HELP, '-', "Display this summary"},
 109     {"ignore_err", OPT_IGNORE_ERR, '-',
 110      "Ignore error on OCSP request or response and continue running"},
 111     {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
 112     {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
 113     {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
 114     {"no-CAfile", OPT_NOCAFILE, '-',
 115      "Do not load the default certificates file"},
 116     {"no-CApath", OPT_NOCAPATH, '-',
 117      "Do not load certificates from the default certificates directory"},
 118     {"no-CAstore", OPT_NOCASTORE, '-',
 119      "Do not load certificates from the default certificates store"},
 120
 121     OPT_SECTION("Responder"),
 122     {"timeout", OPT_TIMEOUT, 'p',
 123      "Connection timeout (in seconds) to the OCSP responder"},
 124     {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
 125      "Don't include any certificates in response"},
 126 #ifdef HTTP_DAEMON
 127     {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
 128 #endif
 129     {"no_certs", OPT_NO_CERTS, '-',
 130      "Don't include any certificates in signed request"},
 131     {"badsig", OPT_BADSIG, '-',
 132         "Corrupt last byte of loaded OCSP response signature (for test)"},
 133     {"CA", OPT_CA, '<', "CA certificates"},
 134     {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
 135     {"nrequest", OPT_REQUEST, 'p',
 136      "Number of requests to accept (default unlimited)"},
 137     {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
 138     {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
 139     {"sign_other", OPT_SIGN_OTHER, '<',
 140      "Additional certificates to include in signed request"},
 141     {"index", OPT_INDEX, '<', "Certificate status index file"},
 142     {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
 143     {"rsigner", OPT_RSIGNER, '<',
 144      "Responder certificate to sign responses with"},
 145     {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
 146     {"passin", OPT_PASSIN, 's', "Responder key pass phrase source"},
 147     {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
 148     {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
 149     {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
 150     {"header", OPT_HEADER, 's', "key=value header to add"},
 151     {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
 152     {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
 153
 154     OPT_SECTION("Client"),
 155     {"url", OPT_URL, 's', "Responder URL"},
 156     {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
 157     {"port", OPT_PORT, 'N', "Port to run responder on"},
 158     {"path", OPT_PATH, 's', "Path to use in OCSP request"},
 159 #ifndef OPENSSL_NO_SOCK
 160     {"proxy", OPT_PROXY, 's',
 161      "[http[s]://]host[:port][/path] of HTTP(S) proxy to use; path is ignored"},
 162     {"no_proxy", OPT_NO_PROXY, 's',
 163      "List of addresses of servers not to use HTTP(S) proxy for"},
 164     {OPT_MORE_STR, 0, 0,
 165      "Default from environment variable 'no_proxy', else 'NO_PROXY', else none"},
 166 #endif
 167     {"out", OPT_OUTFILE, '>', "Output filename"},
 168     {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
 169     {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
 170     {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
 171     {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
 172      "Don't check signature on response"},
 173     {"resp_key_id", OPT_RESP_KEY_ID, '-',
 174      "Identify response by signing certificate key ID"},
 175     {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
 176      "Don't check signing certificate"},
 177     {"text", OPT_TEXT, '-', "Print text form of request and response"},
 178     {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
 179     {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
 180     {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
 181     {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
 182      "Don't do additional checks on signing certificate"},
 183     {"no_explicit", OPT_NO_EXPLICIT, '-',
 184      "Do not explicitly check the chain, just verify the root"},
 185     {"trust_other", OPT_TRUST_OTHER, '-',
 186      "Don't verify additional certificates"},
 187     {"no_intern", OPT_NO_INTERN, '-',
 188      "Don't search certificates contained in response for signer"},
 189     {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
 190     {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
 191     {"verify_other", OPT_VERIFY_OTHER, '<',
 192      "Additional certificates to search for signer"},
 193     {"cert", OPT_CERT, '<',
 194      "Certificate to check; may be given multiple times"},
 195     {"serial", OPT_SERIAL, 's',
 196      "Serial number to check; may be given multiple times"},
 197     {"validity_period", OPT_VALIDITY_PERIOD, 'u',
 198      "Maximum validity discrepancy in seconds"},
 199     {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
 200     {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
 201     {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
 202     {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
 203     {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
 204
 205     OPT_V_OPTIONS,
 206     OPT_PROV_OPTIONS,
 207     {NULL}
 208 };
 209
 210 int ocsp_main(int argc, char **argv)
 211 {
 212     BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
 213     EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
 214     STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
 215     int trailing_md = 0;
 216     CA_DB *rdb = NULL;
 217     EVP_PKEY *key = NULL, *rkey = NULL;
 218     OCSP_BASICRESP *bs = NULL;
 219     OCSP_REQUEST *req = NULL;
 220     OCSP_RESPONSE *resp = NULL;
 221     STACK_OF(CONF_VALUE) *headers = NULL;
 222     STACK_OF(OCSP_CERTID) *ids = NULL;
 223     STACK_OF(OPENSSL_STRING) *reqnames = NULL;
 224     STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
 225     STACK_OF(X509) *issuers = NULL;
 226     X509 *issuer = NULL, *cert = NULL;
 227     STACK_OF(X509) *rca_certs = NULL;
 228     EVP_MD *resp_certid_md = NULL;
 229     X509 *signer = NULL, *rsigner = NULL;
 230     X509_STORE *store = NULL;
 231     X509_VERIFY_PARAM *vpm = NULL;
 232     const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
 233     char *header, *value, *respdigname = NULL;
 234     char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
 235 #ifndef OPENSSL_NO_SOCK
 236     char *opt_proxy = NULL;
 237     char *opt_no_proxy = NULL;
 238 #endif
 239     char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
 240     char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
 241     char *rsignfile = NULL, *rkeyfile = NULL;
 242     char *passinarg = NULL, *passin = NULL;
 243     char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
 244     char *signfile = NULL, *keyfile = NULL;
 245     char *thost = NULL, *tport = NULL, *tpath = NULL;
 246     int noCAfile = 0, noCApath = 0, noCAstore = 0;
 247     int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
 248     int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
 249     int req_text = 0, resp_text = 0, res, ret = 1;
 250     int req_timeout = -1;
 251     long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
 252     unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
 253     OPTION_CHOICE o;
 254
 255     if ((reqnames = sk_OPENSSL_STRING_new_null()) == NULL
 256             || (ids = sk_OCSP_CERTID_new_null()) == NULL
 257             || (vpm = X509_VERIFY_PARAM_new()) == NULL)
 258         goto end;
 259
 260     opt_set_unknown_name("digest");
 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 #ifndef OPENSSL_NO_SOCK
 278             req_timeout = atoi(opt_arg());
 279 #endif
 280             break;
 281         case OPT_URL:
 282             OPENSSL_free(thost);
 283             OPENSSL_free(tport);
 284             OPENSSL_free(tpath);
 285             thost = tport = tpath = NULL;
 286             if (!OSSL_HTTP_parse_url(opt_arg(), &use_ssl, NULL /* userinfo */,
 287                                      &host, &port, NULL /* port_num */,
 288                                      &path, NULL /* qry */, NULL /* frag */)) {
 289                 BIO_printf(bio_err, "%s Error parsing -url argument\n", prog);
 290                 goto end;
 291             }
 292             thost = host;
 293             tport = port;
 294             tpath = path;
 295             break;
 296         case OPT_HOST:
 297             host = opt_arg();
 298             break;
 299         case OPT_PORT:
 300             port = opt_arg();
 301             break;
 302         case OPT_PATH:
 303             path = opt_arg();
 304             break;
 305 #ifndef OPENSSL_NO_SOCK
 306         case OPT_PROXY:
 307             opt_proxy = opt_arg();
 308             break;
 309         case OPT_NO_PROXY:
 310             opt_no_proxy = opt_arg();
 311             break;
 312 #endif
 313         case OPT_IGNORE_ERR:
 314             ignore_err = 1;
 315             break;
 316         case OPT_NOVERIFY:
 317             noverify = 1;
 318             break;
 319         case OPT_NONCE:
 320             add_nonce = 2;
 321             break;
 322         case OPT_NO_NONCE:
 323             add_nonce = 0;
 324             break;
 325         case OPT_RESP_NO_CERTS:
 326             rflags |= OCSP_NOCERTS;
 327             break;
 328         case OPT_RESP_KEY_ID:
 329             rflags |= OCSP_RESPID_KEY;
 330             break;
 331         case OPT_NO_CERTS:
 332             sign_flags |= OCSP_NOCERTS;
 333             break;
 334         case OPT_NO_SIGNATURE_VERIFY:
 335             verify_flags |= OCSP_NOSIGS;
 336             break;
 337         case OPT_NO_CERT_VERIFY:
 338             verify_flags |= OCSP_NOVERIFY;
 339             break;
 340         case OPT_NO_CHAIN:
 341             verify_flags |= OCSP_NOCHAIN;
 342             break;
 343         case OPT_NO_CERT_CHECKS:
 344             verify_flags |= OCSP_NOCHECKS;
 345             break;
 346         case OPT_NO_EXPLICIT:
 347             verify_flags |= OCSP_NOEXPLICIT;
 348             break;
 349         case OPT_TRUST_OTHER:
 350             verify_flags |= OCSP_TRUSTOTHER;
 351             break;
 352         case OPT_NO_INTERN:
 353             verify_flags |= OCSP_NOINTERN;
 354             break;
 355         case OPT_BADSIG:
 356             badsig = 1;
 357             break;
 358         case OPT_TEXT:
 359             req_text = resp_text = 1;
 360             break;
 361         case OPT_REQ_TEXT:
 362             req_text = 1;
 363             break;
 364         case OPT_RESP_TEXT:
 365             resp_text = 1;
 366             break;
 367         case OPT_REQIN:
 368             reqin = opt_arg();
 369             break;
 370         case OPT_RESPIN:
 371             respin = opt_arg();
 372             break;
 373         case OPT_SIGNER:
 374             signfile = opt_arg();
 375             break;
 376         case OPT_VAFILE:
 377             verify_certfile = opt_arg();
 378             verify_flags |= OCSP_TRUSTOTHER;
 379             break;
 380         case OPT_SIGN_OTHER:
 381             sign_certfile = opt_arg();
 382             break;
 383         case OPT_VERIFY_OTHER:
 384             verify_certfile = opt_arg();
 385             break;
 386         case OPT_CAFILE:
 387             CAfile = opt_arg();
 388             break;
 389         case OPT_CAPATH:
 390             CApath = opt_arg();
 391             break;
 392         case OPT_CASTORE:
 393             CAstore = opt_arg();
 394             break;
 395         case OPT_NOCAFILE:
 396             noCAfile = 1;
 397             break;
 398         case OPT_NOCAPATH:
 399             noCApath = 1;
 400             break;
 401         case OPT_NOCASTORE:
 402             noCAstore = 1;
 403             break;
 404         case OPT_V_CASES:
 405             if (!opt_verify(o, vpm))
 406                 goto end;
 407             vpmtouched++;
 408             break;
 409         case OPT_VALIDITY_PERIOD:
 410             opt_long(opt_arg(), &nsec);
 411             break;
 412         case OPT_STATUS_AGE:
 413             opt_long(opt_arg(), &maxage);
 414             break;
 415         case OPT_SIGNKEY:
 416             keyfile = opt_arg();
 417             break;
 418         case OPT_REQOUT:
 419             reqout = opt_arg();
 420             break;
 421         case OPT_RESPOUT:
 422             respout = opt_arg();
 423             break;
 424         case OPT_ISSUER:
 425             issuer = load_cert(opt_arg(), FORMAT_UNDEF, "issuer certificate");
 426             if (issuer == NULL)
 427                 goto end;
 428             if (issuers == NULL) {
 429                 if ((issuers = sk_X509_new_null()) == NULL)
 430                     goto end;
 431             }
 432             if (!sk_X509_push(issuers, issuer))
 433                 goto end;
 434             break;
 435         case OPT_CERT:
 436             reset_unknown();
 437             X509_free(cert);
 438             cert = load_cert(opt_arg(), FORMAT_UNDEF, "certificate");
 439             if (cert == NULL)
 440                 goto end;
 441             if (cert_id_md == NULL)
 442                 cert_id_md = (EVP_MD *)EVP_sha1();
 443             if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
 444                 goto end;
 445             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 446                 goto end;
 447             trailing_md = 0;
 448             break;
 449         case OPT_SERIAL:
 450             reset_unknown();
 451             if (cert_id_md == NULL)
 452                 cert_id_md = (EVP_MD *)EVP_sha1();
 453             if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
 454                 goto end;
 455             if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
 456                 goto end;
 457             trailing_md = 0;
 458             break;
 459         case OPT_INDEX:
 460             ridx_filename = opt_arg();
 461             break;
 462         case OPT_CA:
 463             rca_filename = opt_arg();
 464             break;
 465         case OPT_NMIN:
 466             nmin = opt_int_arg();
 467             if (ndays == -1)
 468                 ndays = 0;
 469             break;
 470         case OPT_REQUEST:
 471             accept_count = opt_int_arg();
 472             break;
 473         case OPT_NDAYS:
 474             ndays = atoi(opt_arg());
 475             break;
 476         case OPT_RSIGNER:
 477             rsignfile = opt_arg();
 478             break;
 479         case OPT_RKEY:
 480             rkeyfile = opt_arg();
 481             break;
 482         case OPT_PASSIN:
 483             passinarg = opt_arg();
 484             break;
 485         case OPT_ROTHER:
 486             rcertfile = opt_arg();
 487             break;
 488         case OPT_RMD:   /* Response MessageDigest */
 489             respdigname = opt_arg();
 490             break;
 491         case OPT_RSIGOPT:
 492             if (rsign_sigopts == NULL)
 493                 rsign_sigopts = sk_OPENSSL_STRING_new_null();
 494             if (rsign_sigopts == NULL
 495                 || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
 496                 goto end;
 497             break;
 498         case OPT_HEADER:
 499             header = opt_arg();
 500             value = strchr(header, '=');
 501             if (value == NULL) {
 502                 BIO_printf(bio_err, "Missing = in header key=value\n");
 503                 goto opthelp;
 504             }
 505             *value++ = '\0';
 506             if (!X509V3_add_value(header, value, &headers))
 507                 goto end;
 508             break;
 509         case OPT_RCID:
 510             if (!opt_md(opt_arg(), &resp_certid_md))
 511                 goto opthelp;
 512             break;
 513         case OPT_MD:
 514             if (trailing_md) {
 515                 BIO_printf(bio_err,
 516                            "%s: Digest must be before -cert or -serial\n",
 517                            prog);
 518                 goto opthelp;
 519             }
 520             if (!opt_md(opt_unknown(), &cert_id_md))
 521                 goto opthelp;
 522             trailing_md = 1;
 523             break;
 524         case OPT_MULTI:
 525 #ifdef HTTP_DAEMON
 526             n_responders = atoi(opt_arg());
 527 #endif
 528             break;
 529         case OPT_PROV_CASES:
 530             if (!opt_provider(o))
 531                 goto end;
 532             break;
 533         }
 534     }
 535
 536     /* No extra arguments. */
 537     if (!opt_check_rest_arg(NULL))
 538         goto opthelp;
 539
 540     if (trailing_md) {
 541         BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
 542                    prog);
 543         goto opthelp;
 544     }
 545
 546     if (respdigname != NULL) {
 547         if (!opt_md(respdigname, &rsign_md))
 548             goto end;
 549     }
 550
 551     /* Have we anything to do? */
 552     if (req == NULL && reqin == NULL
 553         && respin == NULL && !(port != NULL && ridx_filename != NULL))
 554         goto opthelp;
 555
 556     out = bio_open_default(outfile, 'w', FORMAT_TEXT);
 557     if (out == NULL)
 558         goto end;
 559
 560     if (req == NULL && (add_nonce != 2))
 561         add_nonce = 0;
 562
 563     if (req == NULL && reqin != NULL) {
 564         derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
 565         if (derbio == NULL)
 566             goto end;
 567         req = d2i_OCSP_REQUEST_bio(derbio, NULL);
 568         BIO_free(derbio);
 569         if (req == NULL) {
 570             BIO_printf(bio_err, "Error reading OCSP request\n");
 571             goto end;
 572         }
 573     }
 574
 575     if (req == NULL && port != NULL) {
 576 #ifndef OPENSSL_NO_SOCK
 577         acbio = http_server_init(prog, port, -1);
 578         if (acbio == NULL)
 579             goto end;
 580 #else
 581         BIO_printf(bio_err, "Cannot act as server - sockets not supported\n");
 582         goto end;
 583 #endif
 584     }
 585
 586     if (rsignfile != NULL) {
 587         if (rkeyfile == NULL)
 588             rkeyfile = rsignfile;
 589         rsigner = load_cert(rsignfile, FORMAT_UNDEF, "responder certificate");
 590         if (rsigner == NULL) {
 591             BIO_printf(bio_err, "Error loading responder certificate\n");
 592             goto end;
 593         }
 594         if (!load_certs(rca_filename, 0, &rca_certs, NULL, "CA certificates"))
 595             goto end;
 596         if (rcertfile != NULL) {
 597             if (!load_certs(rcertfile, 0, &rother, NULL,
 598                             "responder other certificates"))
 599                 goto end;
 600         }
 601         if (!app_passwd(passinarg, NULL, &passin, NULL)) {
 602             BIO_printf(bio_err, "Error getting password\n");
 603             goto end;
 604         }
 605         rkey = load_key(rkeyfile, FORMAT_UNDEF, 0, passin, NULL,
 606                         "responder private key");
 607         if (rkey == NULL)
 608             goto end;
 609     }
 610
 611     if (ridx_filename != NULL
 612         && (rkey == NULL || rsigner == NULL || rca_certs == NULL)) {
 613         BIO_printf(bio_err,
 614                    "Responder mode requires certificate, key, and CA.\n");
 615         goto end;
 616     }
 617
 618     if (ridx_filename != NULL) {
 619         rdb = load_index(ridx_filename, NULL);
 620         if (rdb == NULL || index_index(rdb) <= 0) {
 621             BIO_printf(bio_err,
 622                 "Problem with index file: %s (could not load/parse file)\n",
 623                 ridx_filename);
 624             ret = 1;
 625             goto end;
 626         }
 627     }
 628
 629 #ifdef HTTP_DAEMON
 630     if (n_responders != 0 && acbio != NULL)
 631         spawn_loop(prog);
 632     if (acbio != NULL && req_timeout > 0)
 633         signal(SIGALRM, socket_timeout);
 634 #endif
 635
 636     if (acbio != NULL)
 637         trace_log_message(-1, prog,
 638                           LOG_INFO, "waiting for OCSP client connections...");
 639
 640 redo_accept:
 641
 642     if (acbio != NULL) {
 643 #ifdef HTTP_DAEMON
 644         if (index_changed(rdb)) {
 645             CA_DB *newrdb = load_index(ridx_filename, NULL);
 646
 647             if (newrdb != NULL && index_index(newrdb) > 0) {
 648                 free_index(rdb);
 649                 rdb = newrdb;
 650             } else {
 651                 free_index(newrdb);
 652                 trace_log_message(-1, prog,
 653                                   LOG_ERR, "error reloading updated index: %s",
 654                                   ridx_filename);
 655             }
 656         }
 657 #endif
 658
 659         req = NULL;
 660         res = do_responder(&req, &cbio, acbio, req_timeout);
 661         if (res == 0)
 662             goto redo_accept;
 663
 664         if (req == NULL) {
 665             if (res == 1) {
 666                 resp =
 667                     OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
 668                                          NULL);
 669                 send_ocsp_response(cbio, resp);
 670             }
 671             goto done_resp;
 672         }
 673     }
 674
 675     if (req == NULL
 676         && (signfile != NULL || reqout != NULL
 677             || host != NULL || add_nonce || ridx_filename != NULL)) {
 678         BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
 679         goto end;
 680     }
 681
 682     if (req != NULL && add_nonce) {
 683         if (!OCSP_request_add1_nonce(req, NULL, -1))
 684             goto end;
 685     }
 686
 687     if (signfile != NULL) {
 688         if (keyfile == NULL)
 689             keyfile = signfile;
 690         signer = load_cert(signfile, FORMAT_UNDEF, "signer certificate");
 691         if (signer == NULL) {
 692             BIO_printf(bio_err, "Error loading signer certificate\n");
 693             goto end;
 694         }
 695         if (sign_certfile != NULL) {
 696             if (!load_certs(sign_certfile, 0, &sign_other, NULL,
 697                             "signer certificates"))
 698                 goto end;
 699         }
 700         key = load_key(keyfile, FORMAT_UNDEF, 0, NULL, NULL,
 701                        "signer private key");
 702         if (key == NULL)
 703             goto end;
 704
 705         if (!OCSP_request_sign(req, signer, key, NULL,
 706                                sign_other, sign_flags)) {
 707             BIO_printf(bio_err, "Error signing OCSP request\n");
 708             goto end;
 709         }
 710     }
 711
 712     if (req_text && req != NULL)
 713         OCSP_REQUEST_print(out, req, 0);
 714
 715     if (reqout != NULL) {
 716         derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
 717         if (derbio == NULL)
 718             goto end;
 719         i2d_OCSP_REQUEST_bio(derbio, req);
 720         BIO_free(derbio);
 721     }
 722
 723     if (rdb != NULL) {
 724         make_ocsp_response(bio_err, &resp, req, rdb, rca_certs, rsigner, rkey,
 725                            rsign_md, rsign_sigopts, rother, rflags, nmin, ndays,
 726                            badsig, resp_certid_md);
 727         if (resp == NULL)
 728             goto end;
 729         if (cbio != NULL)
 730             send_ocsp_response(cbio, resp);
 731     } else if (host != NULL) {
 732 #ifndef OPENSSL_NO_SOCK
 733         resp = process_responder(req, host, port, path, opt_proxy, opt_no_proxy,
 734                                  use_ssl, headers, req_timeout);
 735         if (resp == NULL)
 736             goto end;
 737 #else
 738         BIO_printf(bio_err,
 739                    "Error creating connect BIO - sockets not supported\n");
 740         goto end;
 741 #endif
 742     } else if (respin != NULL) {
 743         derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
 744         if (derbio == NULL)
 745             goto end;
 746         resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
 747         BIO_free(derbio);
 748         if (resp == NULL) {
 749             BIO_printf(bio_err, "Error reading OCSP response\n");
 750             goto end;
 751         }
 752     } else {
 753         ret = 0;
 754         goto end;
 755     }
 756
 757  done_resp:
 758
 759     if (respout != NULL) {
 760         derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
 761         if (derbio == NULL)
 762             goto end;
 763         i2d_OCSP_RESPONSE_bio(derbio, resp);
 764         BIO_free(derbio);
 765     }
 766
 767     i = OCSP_response_status(resp);
 768     if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
 769         BIO_printf(out, "Responder Error: %s (%d)\n",
 770                    OCSP_response_status_str(i), i);
 771         if (!ignore_err)
 772                 goto end;
 773     }
 774
 775     if (resp_text)
 776         OCSP_RESPONSE_print(out, resp, 0);
 777
 778     /* If running as responder don't verify our own response */
 779     if (cbio != NULL) {
 780         /* If not unlimited, see if we took all we should. */
 781         if (accept_count != -1 && --accept_count <= 0) {
 782             ret = 0;
 783             goto end;
 784         }
 785         BIO_free_all(cbio);
 786         cbio = NULL;
 787         OCSP_REQUEST_free(req);
 788         req = NULL;
 789         OCSP_RESPONSE_free(resp);
 790         resp = NULL;
 791         goto redo_accept;
 792     }
 793     if (ridx_filename != NULL) {
 794         ret = 0;
 795         goto end;
 796     }
 797
 798     if (store == NULL) {
 799         store = setup_verify(CAfile, noCAfile, CApath, noCApath,
 800                              CAstore, noCAstore);
 801         if (!store)
 802             goto end;
 803     }
 804     if (vpmtouched)
 805         X509_STORE_set1_param(store, vpm);
 806     if (verify_certfile != NULL) {
 807         if (!load_certs(verify_certfile, 0, &verify_other, NULL,
 808                         "validator certificates"))
 809             goto end;
 810     }
 811
 812     bs = OCSP_response_get1_basic(resp);
 813     if (bs == NULL) {
 814         BIO_printf(bio_err, "Error parsing response\n");
 815         goto end;
 816     }
 817
 818     ret = 0;
 819
 820     if (!noverify) {
 821         if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
 822             if (i == -1)
 823                 BIO_printf(bio_err, "WARNING: no nonce in response\n");
 824             else {
 825                 BIO_printf(bio_err, "Nonce Verify error\n");
 826                 ret = 1;
 827                 goto end;
 828             }
 829         }
 830
 831         i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
 832         if (i <= 0 && issuers) {
 833             i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
 834             if (i > 0)
 835                 ERR_clear_error();
 836         }
 837         if (i <= 0) {
 838             BIO_printf(bio_err, "Response Verify Failure\n");
 839             ERR_print_errors(bio_err);
 840             ret = 1;
 841         } else {
 842             BIO_printf(bio_err, "Response verify OK\n");
 843         }
 844     }
 845
 846     if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
 847         ret = 1;
 848
 849  end:
 850     ERR_print_errors(bio_err);
 851     X509_free(signer);
 852     X509_STORE_free(store);
 853     X509_VERIFY_PARAM_free(vpm);
 854     sk_OPENSSL_STRING_free(rsign_sigopts);
 855     EVP_PKEY_free(key);
 856     EVP_PKEY_free(rkey);
 857     EVP_MD_free(cert_id_md);
 858     EVP_MD_free(rsign_md);
 859     EVP_MD_free(resp_certid_md);
 860     X509_free(cert);
 861     OSSL_STACK_OF_X509_free(issuers);
 862     X509_free(rsigner);
 863     OSSL_STACK_OF_X509_free(rca_certs);
 864     free_index(rdb);
 865     BIO_free_all(cbio);
 866     BIO_free_all(acbio);
 867     BIO_free_all(out);
 868     OCSP_REQUEST_free(req);
 869     OCSP_RESPONSE_free(resp);
 870     OCSP_BASICRESP_free(bs);
 871     sk_OPENSSL_STRING_free(reqnames);
 872     sk_OCSP_CERTID_free(ids);
 873     OSSL_STACK_OF_X509_free(sign_other);
 874     OSSL_STACK_OF_X509_free(verify_other);
 875     sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
 876     OPENSSL_free(thost);
 877     OPENSSL_free(tport);
 878     OPENSSL_free(tpath);
 879
 880     return ret;
 881 }
 882
 883 #ifdef HTTP_DAEMON
 884
 885 static int index_changed(CA_DB *rdb)
 886 {
 887     struct stat sb;
 888
 889     if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
 890         if (rdb->dbst.st_mtime != sb.st_mtime
 891             || rdb->dbst.st_ctime != sb.st_ctime
 892             || rdb->dbst.st_ino != sb.st_ino
 893             || rdb->dbst.st_dev != sb.st_dev) {
 894             syslog(LOG_INFO, "index file changed, reloading");
 895             return 1;
 896         }
 897     }
 898     return 0;
 899 }
 900
 901 #endif
 902
 903 static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
 904                          const EVP_MD *cert_id_md, X509 *issuer,
 905                          STACK_OF(OCSP_CERTID) *ids)
 906 {
 907     OCSP_CERTID *id;
 908
 909     if (issuer == NULL) {
 910         BIO_printf(bio_err, "No issuer certificate specified\n");
 911         return 0;
 912     }
 913     if (*req == NULL)
 914         *req = OCSP_REQUEST_new();
 915     if (*req == NULL)
 916         goto err;
 917     id = OCSP_cert_to_id(cert_id_md, cert, issuer);
 918     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
 919         goto err;
 920     if (!OCSP_request_add0_id(*req, id))
 921         goto err;
 922     return 1;
 923
 924  err:
 925     BIO_printf(bio_err, "Error Creating OCSP request\n");
 926     return 0;
 927 }
 928
 929 static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
 930                            const EVP_MD *cert_id_md, X509 *issuer,
 931                            STACK_OF(OCSP_CERTID) *ids)
 932 {
 933     OCSP_CERTID *id;
 934     const X509_NAME *iname;
 935     ASN1_BIT_STRING *ikey;
 936     ASN1_INTEGER *sno;
 937
 938     if (issuer == NULL) {
 939         BIO_printf(bio_err, "No issuer certificate specified\n");
 940         return 0;
 941     }
 942     if (*req == NULL)
 943         *req = OCSP_REQUEST_new();
 944     if (*req == NULL)
 945         goto err;
 946     iname = X509_get_subject_name(issuer);
 947     ikey = X509_get0_pubkey_bitstr(issuer);
 948     sno = s2i_ASN1_INTEGER(NULL, serial);
 949     if (sno == NULL) {
 950         BIO_printf(bio_err, "Error converting serial number %s\n", serial);
 951         return 0;
 952     }
 953     id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
 954     ASN1_INTEGER_free(sno);
 955     if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
 956         goto err;
 957     if (!OCSP_request_add0_id(*req, id))
 958         goto err;
 959     return 1;
 960
 961  err:
 962     BIO_printf(bio_err, "Error Creating OCSP request\n");
 963     return 0;
 964 }
 965
 966 static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
 967                               STACK_OF(OPENSSL_STRING) *names,
 968                               STACK_OF(OCSP_CERTID) *ids, long nsec,
 969                               long maxage)
 970 {
 971     OCSP_CERTID *id;
 972     const char *name;
 973     int i, status, reason;
 974     ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
 975     int ret = 1;
 976
 977     if (req == NULL || !sk_OPENSSL_STRING_num(names))
 978         return 1;
 979
 980     if (bs == NULL || !sk_OCSP_CERTID_num(ids))
 981         return 0;
 982
 983     for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
 984         id = sk_OCSP_CERTID_value(ids, i);
 985         name = sk_OPENSSL_STRING_value(names, i);
 986         BIO_printf(out, "%s: ", name);
 987
 988         if (!OCSP_resp_find_status(bs, id, &status, &reason,
 989                                    &rev, &thisupd, &nextupd)) {
 990             BIO_puts(out, "ERROR: No Status found.\n");
 991             ret = 0;
 992             continue;
 993         }
 994
 995         /*
 996          * Check validity: if invalid write to output BIO so we know which
 997          * response this refers to.
 998          */
 999         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1000             BIO_puts(out, "WARNING: Status times invalid.\n");
1001             ERR_print_errors(out);
1002         }
1003         BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
1004
1005         BIO_puts(out, "\tThis Update: ");
1006         ASN1_GENERALIZEDTIME_print(out, thisupd);
1007         BIO_puts(out, "\n");
1008
1009         if (nextupd) {
1010             BIO_puts(out, "\tNext Update: ");
1011             ASN1_GENERALIZEDTIME_print(out, nextupd);
1012             BIO_puts(out, "\n");
1013         }
1014
1015         if (status != V_OCSP_CERTSTATUS_REVOKED)
1016             continue;
1017
1018         if (reason != -1)
1019             BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
1020
1021         BIO_puts(out, "\tRevocation Time: ");
1022         ASN1_GENERALIZEDTIME_print(out, rev);
1023         BIO_puts(out, "\n");
1024     }
1025     return ret;
1026 }
1027
1028 static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
1029                               CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
1030                               EVP_PKEY *rkey, const EVP_MD *rmd,
1031                               STACK_OF(OPENSSL_STRING) *sigopts,
1032                               STACK_OF(X509) *rother, unsigned long flags,
1033                               int nmin, int ndays, int badsig,
1034                               const EVP_MD *resp_md)
1035 {
1036     ASN1_TIME *thisupd = NULL, *nextupd = NULL;
1037     OCSP_CERTID *cid;
1038     OCSP_BASICRESP *bs = NULL;
1039     int i, id_count;
1040     EVP_MD_CTX *mctx = NULL;
1041     EVP_PKEY_CTX *pkctx = NULL;
1042
1043     id_count = OCSP_request_onereq_count(req);
1044
1045     if (id_count <= 0) {
1046         *resp =
1047             OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
1048         goto end;
1049     }
1050
1051     bs = OCSP_BASICRESP_new();
1052     thisupd = X509_gmtime_adj(NULL, 0);
1053     if (ndays != -1)
1054         nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
1055
1056     /* Examine each certificate id in the request */
1057     for (i = 0; i < id_count; i++) {
1058         OCSP_ONEREQ *one;
1059         ASN1_INTEGER *serial;
1060         char **inf;
1061         int jj;
1062         int found = 0;
1063         ASN1_OBJECT *cert_id_md_oid;
1064         const EVP_MD *cert_id_md;
1065         OCSP_CERTID *cid_resp_md = NULL;
1066
1067         one = OCSP_request_onereq_get0(req, i);
1068         cid = OCSP_onereq_get0_id(one);
1069
1070         OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
1071
1072         cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
1073         if (cert_id_md == NULL) {
1074             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1075                                          NULL);
1076             goto end;
1077         }
1078         for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
1079             X509 *ca_cert = sk_X509_value(ca, jj);
1080             OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
1081
1082             if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
1083                 found = 1;
1084                 if (resp_md != NULL)
1085                     cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
1086             }
1087             OCSP_CERTID_free(ca_id);
1088         }
1089         OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
1090         inf = lookup_serial(db, serial);
1091
1092         /* at this point, we can have cid be an alias of cid_resp_md */
1093         cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
1094
1095         if (!found) {
1096             OCSP_basic_add1_status(bs, cid,
1097                                    V_OCSP_CERTSTATUS_UNKNOWN,
1098                                    0, NULL, thisupd, nextupd);
1099             continue;
1100         }
1101         if (inf == NULL) {
1102             OCSP_basic_add1_status(bs, cid,
1103                                    V_OCSP_CERTSTATUS_UNKNOWN,
1104                                    0, NULL, thisupd, nextupd);
1105         } else if (inf[DB_type][0] == DB_TYPE_VAL) {
1106             OCSP_basic_add1_status(bs, cid,
1107                                    V_OCSP_CERTSTATUS_GOOD,
1108                                    0, NULL, thisupd, nextupd);
1109         } else if (inf[DB_type][0] == DB_TYPE_REV) {
1110             ASN1_OBJECT *inst = NULL;
1111             ASN1_TIME *revtm = NULL;
1112             ASN1_GENERALIZEDTIME *invtm = NULL;
1113             OCSP_SINGLERESP *single;
1114             int reason = -1;
1115
1116             unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
1117             single = OCSP_basic_add1_status(bs, cid,
1118                                             V_OCSP_CERTSTATUS_REVOKED,
1119                                             reason, revtm, thisupd, nextupd);
1120             if (single == NULL) {
1121                 *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1122                                              NULL);
1123                 goto end;
1124             }
1125             if (invtm != NULL)
1126                 OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
1127                                              invtm, 0, 0);
1128             else if (inst != NULL)
1129                 OCSP_SINGLERESP_add1_ext_i2d(single,
1130                                              NID_hold_instruction_code, inst,
1131                                              0, 0);
1132             ASN1_OBJECT_free(inst);
1133             ASN1_TIME_free(revtm);
1134             ASN1_GENERALIZEDTIME_free(invtm);
1135         }
1136         OCSP_CERTID_free(cid_resp_md);
1137     }
1138
1139     OCSP_copy_nonce(bs, req);
1140
1141     mctx = EVP_MD_CTX_new();
1142     if (mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
1143         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
1144         goto end;
1145     }
1146     for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
1147         char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
1148
1149         if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
1150             BIO_printf(err, "parameter error \"%s\"\n", sigopt);
1151             ERR_print_errors(bio_err);
1152             *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
1153                                          NULL);
1154             goto end;
1155         }
1156     }
1157     if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
1158         *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
1159         goto end;
1160     }
1161
1162     if (badsig) {
1163         const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
1164         corrupt_signature(sig);
1165     }
1166
1167     *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
1168
1169  end:
1170     EVP_MD_CTX_free(mctx);
1171     ASN1_TIME_free(thisupd);
1172     ASN1_TIME_free(nextupd);
1173     OCSP_BASICRESP_free(bs);
1174 }
1175
1176 static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
1177 {
1178     int i;
1179     BIGNUM *bn = NULL;
1180     char *itmp, *row[DB_NUMBER], **rrow;
1181     for (i = 0; i < DB_NUMBER; i++)
1182         row[i] = NULL;
1183     bn = ASN1_INTEGER_to_BN(ser, NULL);
1184     OPENSSL_assert(bn);         /* FIXME: should report an error at this
1185                                  * point and abort */
1186     if (BN_is_zero(bn)) {
1187         itmp = OPENSSL_strdup("00");
1188         OPENSSL_assert(itmp);
1189     } else {
1190         itmp = BN_bn2hex(bn);
1191     }
1192     row[DB_serial] = itmp;
1193     BN_free(bn);
1194     rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
1195     OPENSSL_free(itmp);
1196     return rrow;
1197 }
1198
1199 static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
1200                         int timeout)
1201 {
1202 #ifndef OPENSSL_NO_SOCK
1203     return http_server_get_asn1_req(ASN1_ITEM_rptr(OCSP_REQUEST),
1204                                     (ASN1_VALUE **)preq, NULL, pcbio, acbio,
1205                                     NULL /* found_keep_alive */,
1206                                     prog, 1 /* accept_get */, timeout);
1207 #else
1208     BIO_printf(bio_err,
1209                "Error getting OCSP request - sockets not supported\n");
1210     *preq = NULL;
1211     return 0;
1212 #endif
1213 }
1214
1215 static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp)
1216 {
1217 #ifndef OPENSSL_NO_SOCK
1218     return http_server_send_asn1_resp(prog, cbio,
1219                                       0 /* no keep-alive */,
1220                                       "application/ocsp-response",
1221                                       ASN1_ITEM_rptr(OCSP_RESPONSE),
1222                                       (const ASN1_VALUE *)resp);
1223 #else
1224     BIO_printf(bio_err,
1225                "Error sending OCSP response - sockets not supported\n");
1226     return 0;
1227 #endif
1228 }
1229
1230 #ifndef OPENSSL_NO_SOCK
1231 OCSP_RESPONSE *process_responder(OCSP_REQUEST *req, const char *host,
1232                                  const char *port, const char *path,
1233                                  const char *proxy, const char *no_proxy,
1234                                  int use_ssl, STACK_OF(CONF_VALUE) *headers,
1235                                  int req_timeout)
1236 {
1237     SSL_CTX *ctx = NULL;
1238     OCSP_RESPONSE *resp = NULL;
1239
1240     if (use_ssl == 1) {
1241         ctx = SSL_CTX_new(TLS_client_method());
1242         if (ctx == NULL) {
1243             BIO_printf(bio_err, "Error creating SSL context.\n");
1244             goto end;
1245         }
1246     }
1247
1248     resp = (OCSP_RESPONSE *)
1249         app_http_post_asn1(host, port, path, proxy, no_proxy,
1250                            ctx, headers, "application/ocsp-request",
1251                            (ASN1_VALUE *)req, ASN1_ITEM_rptr(OCSP_REQUEST),
1252                            "application/ocsp-response",
1253                            req_timeout, ASN1_ITEM_rptr(OCSP_RESPONSE));
1254
1255     if (resp == NULL)
1256         BIO_printf(bio_err, "Error querying OCSP responder\n");
1257
1258  end:
1259     SSL_CTX_free(ctx);
1260     return resp;
1261 }
1262 #endif