text: /*
   * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <openssl/opensslconf.h>
  
  #ifdef OPENSSL_SYS_VMS
    /* So fd_set and friends get properly defined on OpenVMS */
  # define _XOPEN_SOURCE_EXTENDED
  #endif
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <time.h>
  #include <ctype.h>
  
  /* Needs to be included before the openssl headers */
  #include "apps.h"
  #include "http_server.h"
  #include "progs.h"
  #include "internal/sockets.h"
  #include <openssl/e_os2.h>
  #include <openssl/crypto.h>
  #include <openssl/err.h>
  #include <openssl/ssl.h>
  #include <openssl/evp.h>
  #include <openssl/bn.h>
  #include <openssl/x509v3.h>
  
  #if defined(__TANDEM)
  # if defined(OPENSSL_TANDEM_FLOSS)
  #  include <floss.h(floss_fork)>
  # endif
  #endif
  
  #if defined(OPENSSL_SYS_VXWORKS)
  /* not supported */
  int setpgid(pid_t pid, pid_t pgid)
  {
      errno = ENOSYS;
      return 0;
  }
  /* not supported */
  pid_t fork(void)
  {
      errno = ENOSYS;
      return (pid_t) -1;
  }
  #endif
  /* Maximum leeway in validity period: default 5 minutes */
  #define MAX_VALIDITY_PERIOD    (5 * 60)
  
  static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
                           const EVP_MD *cert_id_md, X509 *issuer,
                           STACK_OF(OCSP_CERTID) *ids);
  static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
                             const EVP_MD *cert_id_md, X509 *issuer,
                             STACK_OF(OCSP_CERTID) *ids);
  static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
                                STACK_OF(OPENSSL_STRING) *names,
                                STACK_OF(OCSP_CERTID) *ids, long nsec,
                                long maxage);
  static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
                                CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
                                EVP_PKEY *rkey, const EVP_MD *md,
                                STACK_OF(OPENSSL_STRING) *sigopts,
                                STACK_OF(X509) *rother, unsigned long flags,
                                int nmin, int ndays, int badsig,
                                const EVP_MD *resp_md);
  
  static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
  static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
                          int timeout);
  static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp);
  static char *prog;
  
  #ifdef HTTP_DAEMON
  static int index_changed(CA_DB *);
  #endif
  
  typedef enum OPTION_choice {
      OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
      OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
      OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
      OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
      OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
      OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
      OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
      OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
      OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_CASTORE, OPT_NOCAFILE,
      OPT_NOCAPATH, OPT_NOCASTORE,
      OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
      OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
      OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
      OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_RSIGOPT, OPT_HEADER,
      OPT_PASSIN,
      OPT_RCID,
      OPT_V_ENUM,
      OPT_MD,
      OPT_MULTI, OPT_PROV_ENUM
  } OPTION_CHOICE;
  
  const OPTIONS ocsp_options[] = {
      OPT_SECTION("General"),
      {"help", OPT_HELP, '-', "Display this summary"},
      {"ignore_err", OPT_IGNORE_ERR, '-',
       "Ignore error on OCSP request or response and continue running"},
      {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
      {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
      {"CAstore", OPT_CASTORE, ':', "Trusted certificates store URI"},
      {"no-CAfile", OPT_NOCAFILE, '-',
       "Do not load the default certificates file"},
      {"no-CApath", OPT_NOCAPATH, '-',
       "Do not load certificates from the default certificates directory"},
      {"no-CAstore", OPT_NOCASTORE, '-',
       "Do not load certificates from the default certificates store"},
  
      OPT_SECTION("Responder"),
      {"timeout", OPT_TIMEOUT, 'p',
       "Connection timeout (in seconds) to the OCSP responder"},
      {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
       "Don't include any certificates in response"},
  #ifdef HTTP_DAEMON
      {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
  #endif
      {"no_certs", OPT_NO_CERTS, '-',
       "Don't include any certificates in signed request"},
      {"badsig", OPT_BADSIG, '-',
          "Corrupt last byte of loaded OSCP response signature (for test)"},
      {"CA", OPT_CA, '<', "CA certificate"},
      {"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
      {"nrequest", OPT_REQUEST, 'p',
       "Number of requests to accept (default unlimited)"},
      {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
      {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
      {"sign_other", OPT_SIGN_OTHER, '<',
       "Additional certificates to include in signed request"},
      {"index", OPT_INDEX, '<', "Certificate status index file"},
      {"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
      {"rsigner", OPT_RSIGNER, '<',
       "Responder certificate to sign responses with"},
      {"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
      {"passin", OPT_PASSIN, 's', "Responder key pass phrase source"},
      {"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
      {"rmd", OPT_RMD, 's', "Digest Algorithm to use in signature of OCSP response"},
      {"rsigopt", OPT_RSIGOPT, 's', "OCSP response signature parameter in n:v form"},
      {"header", OPT_HEADER, 's', "key=value header to add"},
      {"rcid", OPT_RCID, 's', "Use specified algorithm for cert id in response"},
      {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
  
      OPT_SECTION("Client"),
      {"url", OPT_URL, 's', "Responder URL"},
      {"host", OPT_HOST, 's', "TCP/IP hostname:port to connect to"},
      {"port", OPT_PORT, 'p', "Port to run responder on"},
      {"out", OPT_OUTFILE, '>', "Output filename"},
      {"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
      {"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
      {"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
      {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
       "Don't check signature on response"},
      {"resp_key_id", OPT_RESP_KEY_ID, '-',
       "Identify response by signing certificate key ID"},
      {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
       "Don't check signing certificate"},
      {"text", OPT_TEXT, '-', "Print text form of request and response"},
      {"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
      {"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
      {"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
      {"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
       "Don't do additional checks on signing certificate"},
      {"no_explicit", OPT_NO_EXPLICIT, '-',
       "Do not explicitly check the chain, just verify the root"},
      {"trust_other", OPT_TRUST_OTHER, '-',
       "Don't verify additional certificates"},
      {"no_intern", OPT_NO_INTERN, '-',
       "Don't search certificates contained in response for signer"},
      {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
      {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
      {"verify_other", OPT_VERIFY_OTHER, '<',
       "Additional certificates to search for signer"},
      {"path", OPT_PATH, 's', "Path to use in OCSP request"},
      {"cert", OPT_CERT, '<', "Certificate to check"},
      {"serial", OPT_SERIAL, 's', "Serial number to check"},
      {"validity_period", OPT_VALIDITY_PERIOD, 'u',
       "Maximum validity discrepancy in seconds"},
      {"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
      {"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
      {"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
      {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
      {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
  
      OPT_V_OPTIONS,
      OPT_PROV_OPTIONS,
      {NULL}
  };
  
  int ocsp_main(int argc, char **argv)
  {
      BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
      EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
      STACK_OF(OPENSSL_STRING) *rsign_sigopts = NULL;
      int trailing_md = 0;
      CA_DB *rdb = NULL;
      EVP_PKEY *key = NULL, *rkey = NULL;
      OCSP_BASICRESP *bs = NULL;
      OCSP_REQUEST *req = NULL;
      OCSP_RESPONSE *resp = NULL;
      STACK_OF(CONF_VALUE) *headers = NULL;
      STACK_OF(OCSP_CERTID) *ids = NULL;
      STACK_OF(OPENSSL_STRING) *reqnames = NULL;
      STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
      STACK_OF(X509) *issuers = NULL;
      X509 *issuer = NULL, *cert = NULL;
      STACK_OF(X509) *rca_cert = NULL;
      EVP_MD *resp_certid_md = NULL;
      X509 *signer = NULL, *rsigner = NULL;
      X509_STORE *store = NULL;
      X509_VERIFY_PARAM *vpm = NULL;
      const char *CAfile = NULL, *CApath = NULL, *CAstore = NULL;
      char *header, *value, *respdigname = NULL;
      char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
      char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
      char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
      char *rsignfile = NULL, *rkeyfile = NULL;
      char *passinarg = NULL, *passin = NULL;
      char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
      char *signfile = NULL, *keyfile = NULL;
      char *thost = NULL, *tport = NULL, *tpath = NULL;
      int noCAfile = 0, noCApath = 0, noCAstore = 0;
      int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
      int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
      int req_text = 0, resp_text = 0, res, ret = 1;
      int req_timeout = -1;
      long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
      unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
      OPTION_CHOICE o;
  
      if ((reqnames = sk_OPENSSL_STRING_new_null()) == NULL
              || (ids = sk_OCSP_CERTID_new_null()) == NULL
              || (vpm = X509_VERIFY_PARAM_new()) == NULL)
          goto end;
  
      prog = opt_init(argc, argv, ocsp_options);
      while ((o = opt_next()) != OPT_EOF) {
          switch (o) {
          case OPT_EOF:
          case OPT_ERR:
   opthelp:
              BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
              goto end;
          case OPT_HELP:
              ret = 0;
              opt_help(ocsp_options);
              goto end;
          case OPT_OUTFILE:
              outfile = opt_arg();
              break;
          case OPT_TIMEOUT:
  #ifndef OPENSSL_NO_SOCK
              req_timeout = atoi(opt_arg());
  #endif
              break;
          case OPT_URL:
              OPENSSL_free(thost);
              OPENSSL_free(tport);
              OPENSSL_free(tpath);
              thost = tport = tpath = NULL;
              if (!OSSL_HTTP_parse_url(opt_arg(), &use_ssl, NULL /* userinfo */,
                                       &host, &port, NULL /* port_num */,
                                       &path, NULL /* qry */, NULL /* frag */)) {
                  BIO_printf(bio_err, "%s Error parsing -url argument\n", prog);
                  goto end;
              }
              thost = host;
              tport = port;
              tpath = path;
              break;
          case OPT_HOST:
              host = opt_arg();
              break;
          case OPT_PORT:
              port = opt_arg();
              break;
          case OPT_IGNORE_ERR:
              ignore_err = 1;
              break;
          case OPT_NOVERIFY:
              noverify = 1;
              break;
          case OPT_NONCE:
              add_nonce = 2;
              break;
          case OPT_NO_NONCE:
              add_nonce = 0;
              break;
          case OPT_RESP_NO_CERTS:
              rflags |= OCSP_NOCERTS;
              break;
          case OPT_RESP_KEY_ID:
              rflags |= OCSP_RESPID_KEY;
              break;
          case OPT_NO_CERTS:
              sign_flags |= OCSP_NOCERTS;
              break;
          case OPT_NO_SIGNATURE_VERIFY:
              verify_flags |= OCSP_NOSIGS;
              break;
          case OPT_NO_CERT_VERIFY:
              verify_flags |= OCSP_NOVERIFY;
              break;
          case OPT_NO_CHAIN:
              verify_flags |= OCSP_NOCHAIN;
              break;
          case OPT_NO_CERT_CHECKS:
              verify_flags |= OCSP_NOCHECKS;
              break;
          case OPT_NO_EXPLICIT:
              verify_flags |= OCSP_NOEXPLICIT;
              break;
          case OPT_TRUST_OTHER:
              verify_flags |= OCSP_TRUSTOTHER;
              break;
          case OPT_NO_INTERN:
              verify_flags |= OCSP_NOINTERN;
              break;
          case OPT_BADSIG:
              badsig = 1;
              break;
          case OPT_TEXT:
              req_text = resp_text = 1;
              break;
          case OPT_REQ_TEXT:
              req_text = 1;
              break;
          case OPT_RESP_TEXT:
              resp_text = 1;
              break;
          case OPT_REQIN:
              reqin = opt_arg();
              break;
          case OPT_RESPIN:
              respin = opt_arg();
              break;
          case OPT_SIGNER:
              signfile = opt_arg();
              break;
          case OPT_VAFILE:
              verify_certfile = opt_arg();
              verify_flags |= OCSP_TRUSTOTHER;
              break;
          case OPT_SIGN_OTHER:
              sign_certfile = opt_arg();
              break;
          case OPT_VERIFY_OTHER:
              verify_certfile = opt_arg();
              break;
          case OPT_CAFILE:
              CAfile = opt_arg();
              break;
          case OPT_CAPATH:
              CApath = opt_arg();
              break;
          case OPT_CASTORE:
              CAstore = opt_arg();
              break;
          case OPT_NOCAFILE:
              noCAfile = 1;
              break;
          case OPT_NOCAPATH:
              noCApath = 1;
              break;
          case OPT_NOCASTORE:
              noCAstore = 1;
              break;
          case OPT_V_CASES:
              if (!opt_verify(o, vpm))
                  goto end;
              vpmtouched++;
              break;
          case OPT_VALIDITY_PERIOD:
              opt_long(opt_arg(), &nsec);
              break;
          case OPT_STATUS_AGE:
              opt_long(opt_arg(), &maxage);
              break;
          case OPT_SIGNKEY:
              keyfile = opt_arg();
              break;
          case OPT_REQOUT:
              reqout = opt_arg();
              break;
          case OPT_RESPOUT:
              respout = opt_arg();
              break;
          case OPT_PATH:
              path = opt_arg();
              break;
          case OPT_ISSUER:
              issuer = load_cert(opt_arg(), "issuer certificate");
              if (issuer == NULL)
                  goto end;
              if (issuers == NULL) {
                  if ((issuers = sk_X509_new_null()) == NULL)
                      goto end;
              }
              if (!sk_X509_push(issuers, issuer))
                  goto end;
              break;
          case OPT_CERT:
              X509_free(cert);
              cert = load_cert(opt_arg(), "certificate");
              if (cert == NULL)
                  goto end;
              if (cert_id_md == NULL)
                  cert_id_md = (EVP_MD *)EVP_sha1();
              if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
                  goto end;
              if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
                  goto end;
              trailing_md = 0;
              break;
          case OPT_SERIAL:
              if (cert_id_md == NULL)
                  cert_id_md = (EVP_MD *)EVP_sha1();
              if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
                  goto end;
              if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
                  goto end;
              trailing_md = 0;
              break;
          case OPT_INDEX:
              ridx_filename = opt_arg();
              break;
          case OPT_CA:
              rca_filename = opt_arg();
              break;
          case OPT_NMIN:
              nmin = opt_int_arg();
              if (ndays == -1)
                  ndays = 0;
              break;
          case OPT_REQUEST:
              accept_count = opt_int_arg();
              break;
          case OPT_NDAYS:
              ndays = atoi(opt_arg());
              break;
          case OPT_RSIGNER:
              rsignfile = opt_arg();
              break;
          case OPT_RKEY:
              rkeyfile = opt_arg();
              break;
          case OPT_PASSIN:
              passinarg = opt_arg();
              break;
          case OPT_ROTHER:
              rcertfile = opt_arg();
              break;
          case OPT_RMD:   /* Response MessageDigest */
              respdigname = opt_arg();
              break;
          case OPT_RSIGOPT:
              if (rsign_sigopts == NULL)
                  rsign_sigopts = sk_OPENSSL_STRING_new_null();
              if (rsign_sigopts == NULL
                  || !sk_OPENSSL_STRING_push(rsign_sigopts, opt_arg()))
                  goto end;
              break;
          case OPT_HEADER:
              header = opt_arg();
              value = strchr(header, '=');
              if (value == NULL) {
                  BIO_printf(bio_err, "Missing = in header key=value\n");
                  goto opthelp;
              }
              *value++ = '\0';
              if (!X509V3_add_value(header, value, &headers))
                  goto end;
              break;
          case OPT_RCID:
              if (!opt_md(opt_arg(), &resp_certid_md))
                  goto opthelp;
              break;
          case OPT_MD:
              if (trailing_md) {
                  BIO_printf(bio_err,
                             "%s: Digest must be before -cert or -serial\n",
                             prog);
                  goto opthelp;
              }
              if (!opt_md(opt_unknown(), &cert_id_md))
                  goto opthelp;
              trailing_md = 1;
              break;
          case OPT_MULTI:
  #ifdef HTTP_DAEMON
              multi = atoi(opt_arg());
  #endif
              break;
          case OPT_PROV_CASES:
              if (!opt_provider(o))
                  goto end;
              break;
          }
      }
  
      /* No extra arguments. */
      argc = opt_num_rest();
      if (argc != 0)
          goto opthelp;
  
      if (trailing_md) {
          BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
                     prog);
          goto opthelp;
      }
  
      if (respdigname != NULL) {
          if (!opt_md(respdigname, &rsign_md))
              goto end;
      }
  
      /* Have we anything to do? */
      if (req == NULL && reqin == NULL
          && respin == NULL && !(port != NULL && ridx_filename != NULL))
          goto opthelp;
  
      out = bio_open_default(outfile, 'w', FORMAT_TEXT);
      if (out == NULL)
          goto end;
  
      if (req == NULL && (add_nonce != 2))
          add_nonce = 0;
  
      if (req == NULL && reqin != NULL) {
          derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
          if (derbio == NULL)
              goto end;
          req = d2i_OCSP_REQUEST_bio(derbio, NULL);
          BIO_free(derbio);
          if (req == NULL) {
              BIO_printf(bio_err, "Error reading OCSP request\n");
              goto end;
          }
      }
  
      if (req == NULL && port != NULL) {
  #ifndef OPENSSL_NO_SOCK
          acbio = http_server_init_bio(prog, port);
          if (acbio == NULL)
              goto end;
  #else
          BIO_printf(bio_err, "Cannot act as server - sockets not supported\n");
          goto end;
  #endif
      }
  
      if (rsignfile != NULL) {
          if (rkeyfile == NULL)
              rkeyfile = rsignfile;
          rsigner = load_cert(rsignfile, "responder certificate");
          if (rsigner == NULL) {
              BIO_printf(bio_err, "Error loading responder certificate\n");
              goto end;
          }
          if (!load_certs(rca_filename, 0, &rca_cert, NULL, "CA certificates"))
              goto end;
          if (rcertfile != NULL) {
              if (!load_certs(rcertfile, 0, &rother, NULL,
                              "responder other certificates"))
                  goto end;
          }
          if (!app_passwd(passinarg, NULL, &passin, NULL)) {
              BIO_printf(bio_err, "Error getting password\n");
              goto end;
          }
          rkey = load_key(rkeyfile, FORMAT_PEM, 0, passin, NULL,
                          "responder private key");
          if (rkey == NULL)
              goto end;
      }
  
      if (ridx_filename != NULL
          && (rkey == NULL || rsigner == NULL || rca_cert == NULL)) {
          BIO_printf(bio_err,
                     "Responder mode requires certificate, key, and CA.\n");
          goto end;
      }
  
      if (ridx_filename != NULL) {
          rdb = load_index(ridx_filename, NULL);
          if (rdb == NULL || index_index(rdb) <= 0) {
              ret = 1;
              goto end;
          }
      }
  
  #ifdef HTTP_DAEMON
      if (multi && acbio != NULL)
          spawn_loop(prog);
      if (acbio != NULL && req_timeout > 0)
          signal(SIGALRM, socket_timeout);
  #endif
  
      if (acbio != NULL)
          log_message(prog, LOG_INFO, "waiting for OCSP client connections...");
  
  redo_accept:
  
      if (acbio != NULL) {
  #ifdef HTTP_DAEMON
          if (index_changed(rdb)) {
              CA_DB *newrdb = load_index(ridx_filename, NULL);
  
              if (newrdb != NULL && index_index(newrdb) > 0) {
                  free_index(rdb);
                  rdb = newrdb;
              } else {
                  free_index(newrdb);
                  log_message(prog, LOG_ERR, "error reloading updated index: %s",
                              ridx_filename);
              }
          }
  #endif
  
          req = NULL;
          res = do_responder(&req, &cbio, acbio, req_timeout);
          if (res == 0)
              goto redo_accept;
  
          if (req == NULL) {
              if (res == 1) {
                  resp =
                      OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST,
                                           NULL);
                  send_ocsp_response(cbio, resp);
              }
              goto done_resp;
          }
      }
  
      if (req == NULL
          && (signfile != NULL || reqout != NULL
              || host != NULL || add_nonce || ridx_filename != NULL)) {
          BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
          goto end;
      }
  
      if (req != NULL && add_nonce) {
          if (!OCSP_request_add1_nonce(req, NULL, -1))
              goto end;
      }
  
      if (signfile != NULL) {
          if (keyfile == NULL)
              keyfile = signfile;
          signer = load_cert(signfile, "signer certificate");
          if (signer == NULL) {
              BIO_printf(bio_err, "Error loading signer certificate\n");
              goto end;
          }
          if (sign_certfile != NULL) {
              if (!load_certs(sign_certfile, 0, &sign_other, NULL,
                              "signer certificates"))
                  goto end;
          }
          key = load_key(keyfile, FORMAT_PEM, 0, NULL, NULL,
                         "signer private key");
          if (key == NULL)
              goto end;
  
          if (!OCSP_request_sign(req, signer, key, NULL,
                                 sign_other, sign_flags)) {
              BIO_printf(bio_err, "Error signing OCSP request\n");
              goto end;
          }
      }
  
      if (req_text && req != NULL)
          OCSP_REQUEST_print(out, req, 0);
  
      if (reqout != NULL) {
          derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
          if (derbio == NULL)
              goto end;
          i2d_OCSP_REQUEST_bio(derbio, req);
          BIO_free(derbio);
      }
  
      if (rdb != NULL) {
          make_ocsp_response(bio_err, &resp, req, rdb, rca_cert, rsigner, rkey,
                             rsign_md, rsign_sigopts, rother, rflags, nmin, ndays,
                             badsig, resp_certid_md);
          if (cbio != NULL)
              send_ocsp_response(cbio, resp);
      } else if (host != NULL) {
  #ifndef OPENSSL_NO_SOCK
          resp = process_responder(req, host, path,
                                   port, use_ssl, headers, req_timeout);
          if (resp == NULL)
              goto end;
  #else
          BIO_printf(bio_err,
                     "Error creating connect BIO - sockets not supported\n");
          goto end;
  #endif
      } else if (respin != NULL) {
          derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
          if (derbio == NULL)
              goto end;
          resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
          BIO_free(derbio);
          if (resp == NULL) {
              BIO_printf(bio_err, "Error reading OCSP response\n");
              goto end;
          }
      } else {
          ret = 0;
          goto end;
      }
  
   done_resp:
  
      if (respout != NULL) {
          derbio = bio_open_default(respout, 'w', FORMAT_ASN1);
          if (derbio == NULL)
              goto end;
          i2d_OCSP_RESPONSE_bio(derbio, resp);
          BIO_free(derbio);
      }
  
      i = OCSP_response_status(resp);
      if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
          BIO_printf(out, "Responder Error: %s (%d)\n",
                     OCSP_response_status_str(i), i);
          if (!ignore_err)
                  goto end;
      }
  
      if (resp_text)
          OCSP_RESPONSE_print(out, resp, 0);
  
      /* If running as responder don't verify our own response */
      if (cbio != NULL) {
          /* If not unlimited, see if we took all we should. */
          if (accept_count != -1 && --accept_count <= 0) {
              ret = 0;
              goto end;
          }
          BIO_free_all(cbio);
          cbio = NULL;
          OCSP_REQUEST_free(req);
          req = NULL;
          OCSP_RESPONSE_free(resp);
          resp = NULL;
          goto redo_accept;
      }
      if (ridx_filename != NULL) {
          ret = 0;
          goto end;
      }
  
      if (store == NULL) {
          store = setup_verify(CAfile, noCAfile, CApath, noCApath,
                               CAstore, noCAstore);
          if (!store)
              goto end;
      }
      if (vpmtouched)
          X509_STORE_set1_param(store, vpm);
      if (verify_certfile != NULL) {
          if (!load_certs(verify_certfile, 0, &verify_other, NULL,
                          "validator certificates"))
              goto end;
      }
  
      bs = OCSP_response_get1_basic(resp);
      if (bs == NULL) {
          BIO_printf(bio_err, "Error parsing response\n");
          goto end;
      }
  
      ret = 0;
  
      if (!noverify) {
          if (req != NULL && ((i = OCSP_check_nonce(req, bs)) <= 0)) {
              if (i == -1)
                  BIO_printf(bio_err, "WARNING: no nonce in response\n");
              else {
                  BIO_printf(bio_err, "Nonce Verify error\n");
                  ret = 1;
                  goto end;
              }
          }
  
          i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
          if (i <= 0 && issuers) {
              i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
              if (i > 0)
                  ERR_clear_error();
          }
          if (i <= 0) {
              BIO_printf(bio_err, "Response Verify Failure\n");
              ERR_print_errors(bio_err);
              ret = 1;
          } else {
              BIO_printf(bio_err, "Response verify OK\n");
          }
      }
  
      if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
          ret = 1;
  
   end:
      ERR_print_errors(bio_err);
      X509_free(signer);
      X509_STORE_free(store);
      X509_VERIFY_PARAM_free(vpm);
      sk_OPENSSL_STRING_free(rsign_sigopts);
      EVP_PKEY_free(key);
      EVP_PKEY_free(rkey);
      EVP_MD_free(cert_id_md);
      EVP_MD_free(rsign_md);
      EVP_MD_free(resp_certid_md);
      X509_free(cert);
      sk_X509_pop_free(issuers, X509_free);
      X509_free(rsigner);
      sk_X509_pop_free(rca_cert, X509_free);
      free_index(rdb);
      BIO_free_all(cbio);
      BIO_free_all(acbio);
      BIO_free_all(out);
      OCSP_REQUEST_free(req);
      OCSP_RESPONSE_free(resp);
      OCSP_BASICRESP_free(bs);
      sk_OPENSSL_STRING_free(reqnames);
      sk_OCSP_CERTID_free(ids);
      sk_X509_pop_free(sign_other, X509_free);
      sk_X509_pop_free(verify_other, X509_free);
      sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
      OPENSSL_free(thost);
      OPENSSL_free(tport);
      OPENSSL_free(tpath);
  
      return ret;
  }
  
  #ifdef HTTP_DAEMON
  
  static int index_changed(CA_DB *rdb)
  {
      struct stat sb;
  
      if (rdb != NULL && stat(rdb->dbfname, &sb) != -1) {
          if (rdb->dbst.st_mtime != sb.st_mtime
              || rdb->dbst.st_ctime != sb.st_ctime
              || rdb->dbst.st_ino != sb.st_ino
              || rdb->dbst.st_dev != sb.st_dev) {
              syslog(LOG_INFO, "index file changed, reloading");
              return 1;
          }
      }
      return 0;
  }
  
  #endif
  
  static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
                           const EVP_MD *cert_id_md, X509 *issuer,
                           STACK_OF(OCSP_CERTID) *ids)
  {
      OCSP_CERTID *id;
  
      if (issuer == NULL) {
          BIO_printf(bio_err, "No issuer certificate specified\n");
          return 0;
      }
      if (*req == NULL)
          *req = OCSP_REQUEST_new();
      if (*req == NULL)
          goto err;
      id = OCSP_cert_to_id(cert_id_md, cert, issuer);
      if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
          goto err;
      if (!OCSP_request_add0_id(*req, id))
          goto err;
      return 1;
  
   err:
      BIO_printf(bio_err, "Error Creating OCSP request\n");
      return 0;
  }
  
  static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
                             const EVP_MD *cert_id_md, X509 *issuer,
                             STACK_OF(OCSP_CERTID) *ids)
  {
      OCSP_CERTID *id;
      const X509_NAME *iname;
      ASN1_BIT_STRING *ikey;
      ASN1_INTEGER *sno;
  
      if (issuer == NULL) {
          BIO_printf(bio_err, "No issuer certificate specified\n");
          return 0;
      }
      if (*req == NULL)
          *req = OCSP_REQUEST_new();
      if (*req == NULL)
          goto err;
      iname = X509_get_subject_name(issuer);
      ikey = X509_get0_pubkey_bitstr(issuer);
      sno = s2i_ASN1_INTEGER(NULL, serial);
      if (sno == NULL) {
          BIO_printf(bio_err, "Error converting serial number %s\n", serial);
          return 0;
      }
      id = OCSP_cert_id_new(cert_id_md, iname, ikey, sno);
      ASN1_INTEGER_free(sno);
      if (id == NULL || !sk_OCSP_CERTID_push(ids, id))
          goto err;
      if (!OCSP_request_add0_id(*req, id))
          goto err;
      return 1;
  
   err:
      BIO_printf(bio_err, "Error Creating OCSP request\n");
      return 0;
  }
  
  static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
                                STACK_OF(OPENSSL_STRING) *names,
                                STACK_OF(OCSP_CERTID) *ids, long nsec,
                                long maxage)
  {
      OCSP_CERTID *id;
      const char *name;
      int i, status, reason;
      ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
      int ret = 1;
  
      if (req == NULL || !sk_OPENSSL_STRING_num(names))
          return 1;
  
      if (bs == NULL || !sk_OCSP_CERTID_num(ids))
          return 0;
  
      for (i = 0; i < sk_OCSP_CERTID_num(ids); i++) {
          id = sk_OCSP_CERTID_value(ids, i);
          name = sk_OPENSSL_STRING_value(names, i);
          BIO_printf(out, "%s: ", name);
  
          if (!OCSP_resp_find_status(bs, id, &status, &reason,
                                     &rev, &thisupd, &nextupd)) {
              BIO_puts(out, "ERROR: No Status found.\n");
              ret = 0;
              continue;
          }
  
          /*
           * Check validity: if invalid write to output BIO so we know which
           * response this refers to.
           */
          if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
              BIO_puts(out, "WARNING: Status times invalid.\n");
              ERR_print_errors(out);
          }
          BIO_printf(out, "%s\n", OCSP_cert_status_str(status));
  
          BIO_puts(out, "\tThis Update: ");
          ASN1_GENERALIZEDTIME_print(out, thisupd);
          BIO_puts(out, "\n");
  
          if (nextupd) {
              BIO_puts(out, "\tNext Update: ");
              ASN1_GENERALIZEDTIME_print(out, nextupd);
              BIO_puts(out, "\n");
          }
  
          if (status != V_OCSP_CERTSTATUS_REVOKED)
              continue;
  
          if (reason != -1)
              BIO_printf(out, "\tReason: %s\n", OCSP_crl_reason_str(reason));
  
          BIO_puts(out, "\tRevocation Time: ");
          ASN1_GENERALIZEDTIME_print(out, rev);
          BIO_puts(out, "\n");
      }
      return ret;
  }
  
  static void make_ocsp_response(BIO *err, OCSP_RESPONSE **resp, OCSP_REQUEST *req,
                                CA_DB *db, STACK_OF(X509) *ca, X509 *rcert,
                                EVP_PKEY *rkey, const EVP_MD *rmd,
                                STACK_OF(OPENSSL_STRING) *sigopts,
                                STACK_OF(X509) *rother, unsigned long flags,
                                int nmin, int ndays, int badsig,
                                const EVP_MD *resp_md)
  {
      ASN1_TIME *thisupd = NULL, *nextupd = NULL;
      OCSP_CERTID *cid;
      OCSP_BASICRESP *bs = NULL;
      int i, id_count;
      EVP_MD_CTX *mctx = NULL;
      EVP_PKEY_CTX *pkctx = NULL;
  
      id_count = OCSP_request_onereq_count(req);
  
      if (id_count <= 0) {
          *resp =
              OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
          goto end;
      }
  
      bs = OCSP_BASICRESP_new();
      thisupd = X509_gmtime_adj(NULL, 0);
      if (ndays != -1)
          nextupd = X509_time_adj_ex(NULL, ndays, nmin * 60, NULL);
  
      /* Examine each certificate id in the request */
      for (i = 0; i < id_count; i++) {
          OCSP_ONEREQ *one;
          ASN1_INTEGER *serial;
          char **inf;
          int jj;
          int found = 0;
          ASN1_OBJECT *cert_id_md_oid;
          const EVP_MD *cert_id_md;
          OCSP_CERTID *cid_resp_md = NULL;
  
          one = OCSP_request_onereq_get0(req, i);
          cid = OCSP_onereq_get0_id(one);
  
          OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
  
          cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
          if (cert_id_md == NULL) {
              *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
                                           NULL);
              goto end;
          }
          for (jj = 0; jj < sk_X509_num(ca) && !found; jj++) {
              X509 *ca_cert = sk_X509_value(ca, jj);
              OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
  
              if (OCSP_id_issuer_cmp(ca_id, cid) == 0) {
                  found = 1;
                  if (resp_md != NULL)
                      cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
              }
              OCSP_CERTID_free(ca_id);
          }
          OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
          inf = lookup_serial(db, serial);
  
          /* at this point, we can have cid be an alias of cid_resp_md */
          cid = (cid_resp_md != NULL) ? cid_resp_md : cid;
  
          if (!found) {
              OCSP_basic_add1_status(bs, cid,
                                     V_OCSP_CERTSTATUS_UNKNOWN,
                                     0, NULL, thisupd, nextupd);
              continue;
          }
          if (inf == NULL) {
              OCSP_basic_add1_status(bs, cid,
                                     V_OCSP_CERTSTATUS_UNKNOWN,
                                     0, NULL, thisupd, nextupd);
          } else if (inf[DB_type][0] == DB_TYPE_VAL) {
              OCSP_basic_add1_status(bs, cid,
                                     V_OCSP_CERTSTATUS_GOOD,
                                     0, NULL, thisupd, nextupd);
          } else if (inf[DB_type][0] == DB_TYPE_REV) {
              ASN1_OBJECT *inst = NULL;
              ASN1_TIME *revtm = NULL;
              ASN1_GENERALIZEDTIME *invtm = NULL;
              OCSP_SINGLERESP *single;
              int reason = -1;
  
              unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
              single = OCSP_basic_add1_status(bs, cid,
                                              V_OCSP_CERTSTATUS_REVOKED,
                                              reason, revtm, thisupd, nextupd);
              if (invtm != NULL)
                  OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date,
                                               invtm, 0, 0);
              else if (inst != NULL)
                  OCSP_SINGLERESP_add1_ext_i2d(single,
                                               NID_hold_instruction_code, inst,
                                               0, 0);
              ASN1_OBJECT_free(inst);
              ASN1_TIME_free(revtm);
              ASN1_GENERALIZEDTIME_free(invtm);
          }
          OCSP_CERTID_free(cid_resp_md);
      }
  
      OCSP_copy_nonce(bs, req);
  
      mctx = EVP_MD_CTX_new();
      if ( mctx == NULL || !EVP_DigestSignInit(mctx, &pkctx, rmd, NULL, rkey)) {
          *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, NULL);
          goto end;
      }
      for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
          char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
  
          if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
              BIO_printf(err, "parameter error \"%s\"\n", sigopt);
              ERR_print_errors(bio_err);
              *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
                                           NULL);
              goto end;
          }
      }
      if (!OCSP_basic_sign_ctx(bs, rcert, mctx, rother, flags)) {
          *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR, bs);
          goto end;
      }
  
      if (badsig) {
          const ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
          corrupt_signature(sig);
      }
  
      *resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
  
   end:
      EVP_MD_CTX_free(mctx);
      ASN1_TIME_free(thisupd);
      ASN1_TIME_free(nextupd);
      OCSP_BASICRESP_free(bs);
  }
  
  static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
  {
      int i;
      BIGNUM *bn = NULL;
      char *itmp, *row[DB_NUMBER], **rrow;
      for (i = 0; i < DB_NUMBER; i++)
          row[i] = NULL;
      bn = ASN1_INTEGER_to_BN(ser, NULL);
      OPENSSL_assert(bn);         /* FIXME: should report an error at this
                                   * point and abort */
      if (BN_is_zero(bn))
          itmp = OPENSSL_strdup("00");
      else
          itmp = BN_bn2hex(bn);
      row[DB_serial] = itmp;
      BN_free(bn);
      rrow = TXT_DB_get_by_index(db->db, DB_serial, row);
      OPENSSL_free(itmp);
      return rrow;
  }
  
  static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
                          int timeout)
  {
  #ifndef OPENSSL_NO_SOCK
      return http_server_get_asn1_req(ASN1_ITEM_rptr(OCSP_REQUEST),
                                      (ASN1_VALUE **)preq, NULL, pcbio, acbio,
                                      prog, 1 /* accept_get */, timeout);
  #else
      BIO_printf(bio_err,
                 "Error getting OCSP request - sockets not supported\n");
      *preq = NULL;
      return 0;
  #endif
  }
  
  static int send_ocsp_response(BIO *cbio, const OCSP_RESPONSE *resp)
  {
  #ifndef OPENSSL_NO_SOCK
      return http_server_send_asn1_resp(cbio, "application/ocsp-response",
                                        ASN1_ITEM_rptr(OCSP_RESPONSE),
                                        (const ASN1_VALUE *)resp);
  #else
      BIO_printf(bio_err,
                 "Error sending OCSP response - sockets not supported\n");
      return 0;
  #endif
  }
  
  #ifndef OPENSSL_NO_SOCK
  OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
                                   const char *host, const char *path,
                                   const char *port, int use_ssl,
                                   STACK_OF(CONF_VALUE) *headers,
                                   int req_timeout)
  {
      SSL_CTX *ctx = NULL;
      OCSP_RESPONSE *resp = NULL;
  
      if (use_ssl == 1) {
          ctx = SSL_CTX_new(TLS_client_method());
          if (ctx == NULL) {
              BIO_printf(bio_err, "Error creating SSL context.\n");
              goto end;
          }
      }
  
      resp = (OCSP_RESPONSE *)
          app_http_post_asn1(host, port, path, NULL, NULL /* no proxy used */,
                             ctx, headers, "application/ocsp-request",
                             (ASN1_VALUE *)req, ASN1_ITEM_rptr(OCSP_REQUEST),
                             req_timeout, ASN1_ITEM_rptr(OCSP_RESPONSE));
  
      if (resp == NULL)
          BIO_printf(bio_err, "Error querying OCSP responder\n");
  
   end:
      SSL_CTX_free(ctx);
      return resp;
  }
  #endif
  