text: /* ocsp.c */
  /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   * project 2000.
   */
  /* ====================================================================
   * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. All advertising materials mentioning features or use of this
   *    software must display the following acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    licensing@OpenSSL.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com).
   *
   */
  #ifndef OPENSSL_NO_OCSP
  
  #ifdef OPENSSL_SYS_VMS
  #define _XOPEN_SOURCE_EXTENDED	/* So fd_set and friends get properly defined
  				   on OpenVMS */
  #endif
  
  #define USE_SOCKETS
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <time.h>
  #include "apps.h" /* needs to be included before the openssl headers! */
  #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(NETWARE_CLIB)
  #  ifdef NETWARE_BSDSOCK
  #    include <sys/socket.h>
  #    include <sys/bsdskt.h>
  #  else
  #    include <novsock2.h>
  #  endif
  #elif defined(NETWARE_LIBC)
  #  ifdef NETWARE_BSDSOCK
  #    include <sys/select.h>
  #  else
  #    include <novsock2.h>
  #  endif
  #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 int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req, CA_DB *db,
  			X509 *ca, X509 *rcert, EVP_PKEY *rkey, const EVP_MD *md,
  			STACK_OF(X509) *rother, unsigned long flags,
  			int nmin, int ndays, int badsig);
  
  static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
  static BIO *init_responder(const char *port);
  static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, const char *port);
  static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
  static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
  				      const STACK_OF(CONF_VALUE) *headers,
  				      OCSP_REQUEST *req, int req_timeout);
  
  #undef PROG
  #define PROG ocsp_main
  
  int MAIN(int, char **);
  
  int MAIN(int argc, char **argv)
  	{
  	ENGINE *e = NULL;
  	char **args;
  	char *host = NULL, *port = NULL, *path = "/";
  	char *thost = NULL, *tport = NULL, *tpath = NULL;
  	char *reqin = NULL, *respin = NULL;
  	char *reqout = NULL, *respout = NULL;
  	char *signfile = NULL, *keyfile = NULL;
  	char *rsignfile = NULL, *rkeyfile = NULL;
  	char *outfile = NULL;
  	int add_nonce = 1, noverify = 0, use_ssl = -1;
  	STACK_OF(CONF_VALUE) *headers = NULL;
  	OCSP_REQUEST *req = NULL;
  	OCSP_RESPONSE *resp = NULL;
  	OCSP_BASICRESP *bs = NULL;
  	X509 *issuer = NULL, *cert = NULL;
  	X509 *signer = NULL, *rsigner = NULL;
  	EVP_PKEY *key = NULL, *rkey = NULL;
  	BIO *acbio = NULL, *cbio = NULL;
  	BIO *derbio = NULL;
  	BIO *out = NULL;
  	int req_timeout = -1;
  	int req_text = 0, resp_text = 0;
  	long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
  	char *CAfile = NULL, *CApath = NULL;
  	X509_STORE *store = NULL;
  	X509_VERIFY_PARAM *vpm = NULL;
  	STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
  	char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
  	unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
  	int ret = 1;
  	int accept_count = -1;
  	int badarg = 0;
  	int badsig = 0;
  	int i;
  	int ignore_err = 0;
  	STACK_OF(OPENSSL_STRING) *reqnames = NULL;
  	STACK_OF(OCSP_CERTID) *ids = NULL;
  
  	X509 *rca_cert = NULL;
  	char *ridx_filename = NULL;
  	char *rca_filename = NULL;
  	CA_DB *rdb = NULL;
  	int nmin = 0, ndays = -1;
  	const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
  
  	if (bio_err == NULL) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
  
  	if (!load_config(bio_err, NULL))
  		goto end;
  	SSL_load_error_strings();
  	OpenSSL_add_ssl_algorithms();
  	args = argv + 1;
  	reqnames = sk_OPENSSL_STRING_new_null();
  	ids = sk_OCSP_CERTID_new_null();
  	while (!badarg && *args && *args[0] == '-')
  		{
  		if (!strcmp(*args, "-out"))
  			{
  			if (args[1])
  				{
  				args++;
  				outfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-timeout"))
  			{
  			if (args[1])
  				{
  				args++;
  				req_timeout = atol(*args);
  				if (req_timeout < 0)
  					{
  					BIO_printf(bio_err,
  						"Illegal timeout value %s\n",
  						*args);
  					badarg = 1;
  					}
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-url"))
  			{
  			if (thost)
  				OPENSSL_free(thost);
  			if (tport)
  				OPENSSL_free(tport);
  			if (tpath)
  				OPENSSL_free(tpath);
  			if (args[1])
  				{
  				args++;
  				if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl))
  					{
  					BIO_printf(bio_err, "Error parsing URL\n");
  					badarg = 1;
  					}
  				thost = host;
  				tport = port;
  				tpath = path;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-host"))
  			{
  			if (args[1])
  				{
  				args++;
  				host = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-port"))
  			{
  			if (args[1])
  				{
  				args++;
  				port = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-header"))
  			{
  			if (args[1] && args[2])
  				{
  				if (!X509V3_add_value(args[1], args[2], &headers))
  					goto end;
  				args += 2;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-ignore_err"))
  			ignore_err = 1;
  		else if (!strcmp(*args, "-noverify"))
  			noverify = 1;
  		else if (!strcmp(*args, "-nonce"))
  			add_nonce = 2;
  		else if (!strcmp(*args, "-no_nonce"))
  			add_nonce = 0;
  		else if (!strcmp(*args, "-resp_no_certs"))
  			rflags |= OCSP_NOCERTS;
  		else if (!strcmp(*args, "-resp_key_id"))
  			rflags |= OCSP_RESPID_KEY;
  		else if (!strcmp(*args, "-no_certs"))
  			sign_flags |= OCSP_NOCERTS;
  		else if (!strcmp(*args, "-no_signature_verify"))
  			verify_flags |= OCSP_NOSIGS;
  		else if (!strcmp(*args, "-no_cert_verify"))
  			verify_flags |= OCSP_NOVERIFY;
  		else if (!strcmp(*args, "-no_chain"))
  			verify_flags |= OCSP_NOCHAIN;
  		else if (!strcmp(*args, "-no_cert_checks"))
  			verify_flags |= OCSP_NOCHECKS;
  		else if (!strcmp(*args, "-no_explicit"))
  			verify_flags |= OCSP_NOEXPLICIT;
  		else if (!strcmp(*args, "-trust_other"))
  			verify_flags |= OCSP_TRUSTOTHER;
  		else if (!strcmp(*args, "-no_intern"))
  			verify_flags |= OCSP_NOINTERN;
  		else if (!strcmp(*args, "-badsig"))
  			badsig = 1;
  		else if (!strcmp(*args, "-text"))
  			{
  			req_text = 1;
  			resp_text = 1;
  			}
  		else if (!strcmp(*args, "-req_text"))
  			req_text = 1;
  		else if (!strcmp(*args, "-resp_text"))
  			resp_text = 1;
  		else if (!strcmp(*args, "-reqin"))
  			{
  			if (args[1])
  				{
  				args++;
  				reqin = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-respin"))
  			{
  			if (args[1])
  				{
  				args++;
  				respin = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-signer"))
  			{
  			if (args[1])
  				{
  				args++;
  				signfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-VAfile"))
  			{
  			if (args[1])
  				{
  				args++;
  				verify_certfile = *args;
  				verify_flags |= OCSP_TRUSTOTHER;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-sign_other"))
  			{
  			if (args[1])
  				{
  				args++;
  				sign_certfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-verify_other"))
  			{
  			if (args[1])
  				{
  				args++;
  				verify_certfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-CAfile"))
  			{
  			if (args[1])
  				{
  				args++;
  				CAfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-CApath"))
  			{
  			if (args[1])
  				{
  				args++;
  				CApath = *args;
  				}
  			else badarg = 1;
  			}
  		else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
  			{
  			if (badarg)
  				goto end;
  			continue;
  			}
  		else if (!strcmp (*args, "-validity_period"))
  			{
  			if (args[1])
  				{
  				args++;
  				nsec = atol(*args);
  				if (nsec < 0)
  					{
  					BIO_printf(bio_err,
  						"Illegal validity period %s\n",
  						*args);
  					badarg = 1;
  					}
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-status_age"))
  			{
  			if (args[1])
  				{
  				args++;
  				maxage = atol(*args);
  				if (maxage < 0)
  					{
  					BIO_printf(bio_err,
  						"Illegal validity age %s\n",
  						*args);
  					badarg = 1;
  					}
  				}
  			else badarg = 1;
  			}
  		 else if (!strcmp(*args, "-signkey"))
  			{
  			if (args[1])
  				{
  				args++;
  				keyfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-reqout"))
  			{
  			if (args[1])
  				{
  				args++;
  				reqout = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-respout"))
  			{
  			if (args[1])
  				{
  				args++;
  				respout = *args;
  				}
  			else badarg = 1;
  			}
  		 else if (!strcmp(*args, "-path"))
  			{
  			if (args[1])
  				{
  				args++;
  				path = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-issuer"))
  			{
  			if (args[1])
  				{
  				args++;
  				X509_free(issuer);
  				issuer = load_cert(bio_err, *args, FORMAT_PEM,
  					NULL, e, "issuer certificate");
  				if(!issuer) goto end;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-cert"))
  			{
  			if (args[1])
  				{
  				args++;
  				X509_free(cert);
  				cert = load_cert(bio_err, *args, FORMAT_PEM,
  					NULL, e, "certificate");
  				if(!cert) goto end;
  				if (!cert_id_md) cert_id_md = EVP_sha1();
  				if(!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
  					goto end;
  				if(!sk_OPENSSL_STRING_push(reqnames, *args))
  					goto end;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-serial"))
  			{
  			if (args[1])
  				{
  				args++;
  				if (!cert_id_md) cert_id_md = EVP_sha1();
  				if(!add_ocsp_serial(&req, *args, cert_id_md, issuer, ids))
  					goto end;
  				if(!sk_OPENSSL_STRING_push(reqnames, *args))
  					goto end;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-index"))
  			{
  			if (args[1])
  				{
  				args++;
  				ridx_filename = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-CA"))
  			{
  			if (args[1])
  				{
  				args++;
  				rca_filename = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-nmin"))
  			{
  			if (args[1])
  				{
  				args++;
  				nmin = atol(*args);
  				if (nmin < 0)
  					{
  					BIO_printf(bio_err,
  						"Illegal update period %s\n",
  						*args);
  					badarg = 1;
  					}
  				}
  				if (ndays == -1)
  					ndays = 0;
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-nrequest"))
  			{
  			if (args[1])
  				{
  				args++;
  				accept_count = atol(*args);
  				if (accept_count < 0)
  					{
  					BIO_printf(bio_err,
  						"Illegal accept count %s\n",
  						*args);
  					badarg = 1;
  					}
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp (*args, "-ndays"))
  			{
  			if (args[1])
  				{
  				args++;
  				ndays = atol(*args);
  				if (ndays < 0)
  					{
  					BIO_printf(bio_err,
  						"Illegal update period %s\n",
  						*args);
  					badarg = 1;
  					}
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-rsigner"))
  			{
  			if (args[1])
  				{
  				args++;
  				rsignfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-rkey"))
  			{
  			if (args[1])
  				{
  				args++;
  				rkeyfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-rother"))
  			{
  			if (args[1])
  				{
  				args++;
  				rcertfile = *args;
  				}
  			else badarg = 1;
  			}
  		else if (!strcmp(*args, "-rmd"))
  			{
  			if (args[1])
  				{
  				args++;
  				rsign_md = EVP_get_digestbyname(*args);
  				if (!rsign_md)
  					badarg = 1;
  				}
  			else badarg = 1;
  			}
  		else if ((cert_id_md = EVP_get_digestbyname((*args)+1))==NULL)
  			{
  			badarg = 1;
  			}
  		args++;
  		}
  
  	/* Have we anything to do? */
  	if (!req && !reqin && !respin && !(port && ridx_filename)) badarg = 1;
  
  	if (badarg)
  		{
  		BIO_printf (bio_err, "OCSP utility\n");
  		BIO_printf (bio_err, "Usage ocsp [options]\n");
  		BIO_printf (bio_err, "where options are\n");
  		BIO_printf (bio_err, "-out file          output filename\n");
  		BIO_printf (bio_err, "-issuer file       issuer certificate\n");
  		BIO_printf (bio_err, "-cert file         certificate to check\n");
  		BIO_printf (bio_err, "-serial n          serial number to check\n");
  		BIO_printf (bio_err, "-signer file       certificate to sign OCSP request with\n");
  		BIO_printf (bio_err, "-signkey file      private key to sign OCSP request with\n");
  		BIO_printf (bio_err, "-sign_other file   additional certificates to include in signed request\n");
  		BIO_printf (bio_err, "-no_certs          don't include any certificates in signed request\n");
  		BIO_printf (bio_err, "-req_text          print text form of request\n");
  		BIO_printf (bio_err, "-resp_text         print text form of response\n");
  		BIO_printf (bio_err, "-text              print text form of request and response\n");
  		BIO_printf (bio_err, "-reqout file       write DER encoded OCSP request to \"file\"\n");
  		BIO_printf (bio_err, "-respout file      write DER encoded OCSP reponse to \"file\"\n");
  		BIO_printf (bio_err, "-reqin file        read DER encoded OCSP request from \"file\"\n");
  		BIO_printf (bio_err, "-respin file       read DER encoded OCSP reponse from \"file\"\n");
  		BIO_printf (bio_err, "-nonce             add OCSP nonce to request\n");
  		BIO_printf (bio_err, "-no_nonce          don't add OCSP nonce to request\n");
  		BIO_printf (bio_err, "-url URL           OCSP responder URL\n");
  		BIO_printf (bio_err, "-host host:n       send OCSP request to host on port n\n");
  		BIO_printf (bio_err, "-path              path to use in OCSP request\n");
  		BIO_printf (bio_err, "-CApath dir        trusted certificates directory\n");
  		BIO_printf (bio_err, "-CAfile file       trusted certificates file\n");
  		BIO_printf (bio_err, "-VAfile file       validator certificates file\n");
  		BIO_printf (bio_err, "-validity_period n maximum validity discrepancy in seconds\n");
  		BIO_printf (bio_err, "-status_age n      maximum status age in seconds\n");
  		BIO_printf (bio_err, "-noverify          don't verify response at all\n");
  		BIO_printf (bio_err, "-verify_other file additional certificates to search for signer\n");
  		BIO_printf (bio_err, "-trust_other       don't verify additional certificates\n");
  		BIO_printf (bio_err, "-no_intern         don't search certificates contained in response for signer\n");
  		BIO_printf (bio_err, "-no_signature_verify don't check signature on response\n");
  		BIO_printf (bio_err, "-no_cert_verify    don't check signing certificate\n");
  		BIO_printf (bio_err, "-no_chain          don't chain verify response\n");
  		BIO_printf (bio_err, "-no_cert_checks    don't do additional checks on signing certificate\n");
  		BIO_printf (bio_err, "-port num		 port to run responder on\n");
  		BIO_printf (bio_err, "-index file	 certificate status index file\n");
  		BIO_printf (bio_err, "-CA file		 CA certificate\n");
  		BIO_printf (bio_err, "-rsigner file	 responder certificate to sign responses with\n");
  		BIO_printf (bio_err, "-rkey file	 responder key to sign responses with\n");
  		BIO_printf (bio_err, "-rother file	 other certificates to include in response\n");
  		BIO_printf (bio_err, "-resp_no_certs     don't include any certificates in response\n");
  		BIO_printf (bio_err, "-nmin n	 	 number of minutes before next update\n");
  		BIO_printf (bio_err, "-ndays n	 	 number of days before next update\n");
  		BIO_printf (bio_err, "-resp_key_id       identify reponse by signing certificate key ID\n");
  		BIO_printf (bio_err, "-nrequest n        number of requests to accept (default unlimited)\n");
  		BIO_printf (bio_err, "-<dgst alg>     use specified digest in the request\n");
  		goto end;
  		}
  
  	if(outfile) out = BIO_new_file(outfile, "w");
  	else out = BIO_new_fp(stdout, BIO_NOCLOSE);
  
  	if(!out)
  		{
  		BIO_printf(bio_err, "Error opening output file\n");
  		goto end;
  		}
  
  	if (!req && (add_nonce != 2)) add_nonce = 0;
  
  	if (!req && reqin)
  		{
  		if (!strcmp(reqin, "-"))
  			derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
  		else
  			derbio = BIO_new_file(reqin, "rb");
  		if (!derbio)
  			{
  			BIO_printf(bio_err, "Error Opening OCSP request file\n");
  			goto end;
  			}
  		req = d2i_OCSP_REQUEST_bio(derbio, NULL);
  		BIO_free(derbio);
  		if(!req)
  			{
  			BIO_printf(bio_err, "Error reading OCSP request\n");
  			goto end;
  			}
  		}
  
  	if (!req && port)
  		{
  		acbio = init_responder(port);
  		if (!acbio)
  			goto end;
  		}
  
  	if (rsignfile && !rdb)
  		{
  		if (!rkeyfile) rkeyfile = rsignfile;
  		rsigner = load_cert(bio_err, rsignfile, FORMAT_PEM,
  			NULL, e, "responder certificate");
  		if (!rsigner)
  			{
  			BIO_printf(bio_err, "Error loading responder certificate\n");
  			goto end;
  			}
  		rca_cert = load_cert(bio_err, rca_filename, FORMAT_PEM,
  			NULL, e, "CA certificate");
  		if (rcertfile)
  			{
  			rother = load_certs(bio_err, rcertfile, FORMAT_PEM,
  				NULL, e, "responder other certificates");
  			if (!rother) goto end;
  			}
  		rkey = load_key(bio_err, rkeyfile, FORMAT_PEM, 0, NULL, NULL,
  			"responder private key");
  		if (!rkey)
  			goto end;
  		}
  	if(acbio)
  		BIO_printf(bio_err, "Waiting for OCSP client connections...\n");
  
  	redo_accept:
  
  	if (acbio)
  		{
  		if (!do_responder(&req, &cbio, acbio, port))
  			goto end;
  		if (!req)
  			{
  			resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
  			send_ocsp_response(cbio, resp);
  			goto done_resp;
  			}
  		}
  
  	if (!req && (signfile || reqout || host || add_nonce || ridx_filename))
  		{
  		BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
  		goto end;
  		}
  
  	if (req && add_nonce) OCSP_request_add1_nonce(req, NULL, -1);
  
  	if (signfile)
  		{
  		if (!keyfile) keyfile = signfile;
  		signer = load_cert(bio_err, signfile, FORMAT_PEM,
  			NULL, e, "signer certificate");
  		if (!signer)
  			{
  			BIO_printf(bio_err, "Error loading signer certificate\n");
  			goto end;
  			}
  		if (sign_certfile)
  			{
  			sign_other = load_certs(bio_err, sign_certfile, FORMAT_PEM,
  				NULL, e, "signer certificates");
  			if (!sign_other) goto end;
  			}
  		key = load_key(bio_err, keyfile, FORMAT_PEM, 0, NULL, NULL,
  			"signer private key");
  		if (!key)
  			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) OCSP_REQUEST_print(out, req, 0);
  
  	if (reqout)
  		{
  		if (!strcmp(reqout, "-"))
  			derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
  		else
  			derbio = BIO_new_file(reqout, "wb");
  		if(!derbio)
  			{
  			BIO_printf(bio_err, "Error opening file %s\n", reqout);
  			goto end;
  			}
  		i2d_OCSP_REQUEST_bio(derbio, req);
  		BIO_free(derbio);
  		}
  
  	if (ridx_filename && (!rkey || !rsigner || !rca_cert))
  		{
  		BIO_printf(bio_err, "Need a responder certificate, key and CA for this operation!\n");
  		goto end;
  		}
  
  	if (ridx_filename && !rdb)
  		{
  		rdb = load_index(ridx_filename, NULL);
  		if (!rdb) goto end;
  		if (!index_index(rdb)) goto end;
  		}
  
  	if (rdb)
  		{
  		i = make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey,rsign_md, rother, rflags, nmin, ndays, badsig);
  		if (cbio)
  			send_ocsp_response(cbio, resp);
  		}
  	else if (host)
  		{
  #ifndef OPENSSL_NO_SOCK
  		resp = process_responder(bio_err, req, host, path,
  					port, use_ssl, headers, req_timeout);
  		if (!resp)
  			goto end;
  #else
  		BIO_printf(bio_err, "Error creating connect BIO - sockets not supported.\n");
  		goto end;
  #endif
  		}
  	else if (respin)
  		{
  		if (!strcmp(respin, "-"))
  			derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
  		else
  			derbio = BIO_new_file(respin, "rb");
  		if (!derbio)
  			{
  			BIO_printf(bio_err, "Error Opening OCSP response file\n");
  			goto end;
  			}
  		resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
  		BIO_free(derbio);
  		if(!resp)
  			{
  			BIO_printf(bio_err, "Error reading OCSP response\n");
  			goto end;
  			}
  	
  		}
  	else
  		{
  		ret = 0;
  		goto end;
  		}
  
  	done_resp:
  
  	if (respout)
  		{
  		if (!strcmp(respout, "-"))
  			derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
  		else
  			derbio = BIO_new_file(respout, "wb");
  		if(!derbio)
  			{
  			BIO_printf(bio_err, "Error opening file %s\n", respout);
  			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 redo_accept;
  		ret = 0;
  		goto end;
  		}
  
  	if (resp_text) OCSP_RESPONSE_print(out, resp, 0);
  
  	/* If running as responder don't verify our own response */
  	if (cbio)
  		{
  		if (accept_count > 0)
  			accept_count--;
  		/* Redo if more connections needed */
  		if (accept_count)
  			{
  			BIO_free_all(cbio);
  			cbio = NULL;
  			OCSP_REQUEST_free(req);
  			req = NULL;
  			OCSP_RESPONSE_free(resp);
  			resp = NULL;
  			goto redo_accept;
  			}
  		ret = 0;
  		goto end;
  		}
  	else if (ridx_filename)
  		{
  		ret = 0;
  		goto end;
  		}
  
  	if (!store)
  		store = setup_verify(bio_err, CAfile, CApath);
  	if (!store)
  		goto end;
  	if (vpm)
  		X509_STORE_set1_param(store, vpm);
  	if (verify_certfile)
  		{
  		verify_other = load_certs(bio_err, verify_certfile, FORMAT_PEM,
  			NULL, e, "validator certificate");
  		if (!verify_other) goto end;
  		}
  
  	bs = OCSP_response_get1_basic(resp);
  
  	if (!bs)
  		{
  		BIO_printf(bio_err, "Error parsing response\n");
  		goto end;
  		}
  
  	ret = 0;
  
  	if (!noverify)
  		{
  		if (req && ((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)
  			{
  			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);
  	if (vpm)
  		X509_VERIFY_PARAM_free(vpm);
  	EVP_PKEY_free(key);
  	EVP_PKEY_free(rkey);
  	X509_free(issuer);
  	X509_free(cert);
  	X509_free(rsigner);
  	X509_free(rca_cert);
  	free_index(rdb);
  	BIO_free_all(cbio);
  	BIO_free_all(acbio);
  	BIO_free(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);
  
  	if (thost)
  		OPENSSL_free(thost);
  	if (tport)
  		OPENSSL_free(tport);
  	if (tpath)
  		OPENSSL_free(tpath);
  
  	OPENSSL_EXIT(ret);
  }
  
  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)
  		{
  		BIO_printf(bio_err, "No issuer certificate specified\n");
  		return 0;
  		}
  	if(!*req) *req = OCSP_REQUEST_new();
  	if(!*req) goto err;
  	id = OCSP_cert_to_id(cert_id_md, cert, issuer);
  	if(!id || !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;
  	X509_NAME *iname;
  	ASN1_BIT_STRING *ikey;
  	ASN1_INTEGER *sno;
  	if(!issuer)
  		{
  		BIO_printf(bio_err, "No issuer certificate specified\n");
  		return 0;
  		}
  	if(!*req) *req = OCSP_REQUEST_new();
  	if(!*req) goto err;
  	iname = X509_get_subject_name(issuer);
  	ikey = X509_get0_pubkey_bitstr(issuer);
  	sno = s2i_ASN1_INTEGER(NULL, serial);
  	if(!sno)
  		{
  		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 || !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;
  	char *name;
  	int i;
  
  	int status, reason;
  
  	ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
  
  	if (!bs || !req || !sk_OPENSSL_STRING_num(names) || !sk_OCSP_CERTID_num(ids))
  		return 1;
  
  	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");
  			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 1;
  	}
  
  
  static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req, CA_DB *db,
  			X509 *ca, X509 *rcert,
  			EVP_PKEY *rkey, const EVP_MD *rmd,
  			STACK_OF(X509) *rother, unsigned long flags,
  			int nmin, int ndays, int badsig)
  	{
  	ASN1_TIME *thisupd = NULL, *nextupd = NULL;
  	OCSP_CERTID *cid, *ca_id = NULL;
  	OCSP_BASICRESP *bs = NULL;
  	int i, id_count, ret = 1;
  
  	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_gmtime_adj(NULL, nmin * 60 + ndays * 3600 * 24 );
  
  	/* Examine each certificate id in the request */
  	for (i = 0; i < id_count; i++)
  		{
  		OCSP_ONEREQ *one;
  		ASN1_INTEGER *serial;
  		char **inf;
  		ASN1_OBJECT *cert_id_md_oid;
  		const EVP_MD *cert_id_md;
  		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) 
  			{
  			*resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
  				NULL);
  				goto end;
  			}	
  		if (ca_id) OCSP_CERTID_free(ca_id);
  		ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
  
  		/* Is this request about our CA? */
  		if (OCSP_id_issuer_cmp(ca_id, cid))
  			{
  			OCSP_basic_add1_status(bs, cid,
  						V_OCSP_CERTSTATUS_UNKNOWN,
  						0, NULL,
  						thisupd, nextupd);
  			continue;
  			}
  		OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
  		inf = lookup_serial(db, serial);
  		if (!inf)
  			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)
  				OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date, invtm, 0, 0);
  			else if (inst)
  				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_copy_nonce(bs, req);
  	
  	OCSP_basic_sign(bs, rcert, rkey, rmd, rother, flags);
  
  	if (badsig)
  		bs->signature->data[bs->signature->length -1] ^= 0x1;
  
  	*resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);
  
  	end:
  	ASN1_TIME_free(thisupd);
  	ASN1_TIME_free(nextupd);
  	OCSP_CERTID_free(ca_id);
  	OCSP_BASICRESP_free(bs);
  	return ret;
  
  	}
  
  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 = BUF_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;
  	}
  
  /* Quick and dirty OCSP server: read in and parse input request */
  
  static BIO *init_responder(const char *port)
  	{
  	BIO *acbio = NULL, *bufbio = NULL;
  	bufbio = BIO_new(BIO_f_buffer());
  	if (!bufbio) 
  		goto err;
  #ifndef OPENSSL_NO_SOCK
  	acbio = BIO_new_accept(port);
  #else
  	BIO_printf(bio_err, "Error setting up accept BIO - sockets not supported.\n");
  #endif
  	if (!acbio)
  		goto err;
  	BIO_set_accept_bios(acbio, bufbio);
  	bufbio = NULL;
  
  	if (BIO_do_accept(acbio) <= 0)
  		{
  			BIO_printf(bio_err, "Error setting up accept BIO\n");
  			ERR_print_errors(bio_err);
  			goto err;
  		}
  
  	return acbio;
  
  	err:
  	BIO_free_all(acbio);
  	BIO_free(bufbio);
  	return NULL;
  	}
  
  static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
  			const char *port)
  	{
  	int have_post = 0, len;
  	OCSP_REQUEST *req = NULL;
  	char inbuf[1024];
  	BIO *cbio = NULL;
  
  	if (BIO_do_accept(acbio) <= 0)
  		{
  			BIO_printf(bio_err, "Error accepting connection\n");
  			ERR_print_errors(bio_err);
  			return 0;
  		}
  
  	cbio = BIO_pop(acbio);
  	*pcbio = cbio;
  
  	for(;;)
  		{
  		len = BIO_gets(cbio, inbuf, sizeof inbuf);
  		if (len <= 0)
  			return 1;
  		/* Look for "POST" signalling start of query */
  		if (!have_post)
  			{
  			if(strncmp(inbuf, "POST", 4))
  				{
  				BIO_printf(bio_err, "Invalid request\n");
  				return 1;
  				}
  			have_post = 1;
  			}
  		/* Look for end of headers */
  		if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
  			break;
  		}
  
  	/* Try to read OCSP request */
  
  	req = d2i_OCSP_REQUEST_bio(cbio, NULL);
  
  	if (!req)
  		{
  		BIO_printf(bio_err, "Error parsing OCSP request\n");
  		ERR_print_errors(bio_err);
  		}
  
  	*preq = req;
  
  	return 1;
  
  	}
  
  static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
  	{
  	char http_resp[] = 
  		"HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
  		"Content-Length: %d\r\n\r\n";
  	if (!cbio)
  		return 0;
  	BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
  	i2d_OCSP_RESPONSE_bio(cbio, resp);
  	(void)BIO_flush(cbio);
  	return 1;
  	}
  
  static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
  				      const STACK_OF(CONF_VALUE) *headers,
  				      OCSP_REQUEST *req, int req_timeout)
  	{
  	int fd;
  	int rv;
  	int i;
  	OCSP_REQ_CTX *ctx = NULL;
  	OCSP_RESPONSE *rsp = NULL;
  	fd_set confds;
  	struct timeval tv;
  
  	if (req_timeout != -1)
  		BIO_set_nbio(cbio, 1);
  
  	rv = BIO_do_connect(cbio);
  
  	if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio)))
  		{
  		BIO_puts(err, "Error connecting BIO\n");
  		return NULL;
  		}
  
  	if (BIO_get_fd(cbio, &fd) <= 0)
  		{
  		BIO_puts(err, "Can't get connection fd\n");
  		goto err;
  		}
  
  	if (req_timeout != -1 && rv <= 0)
  		{
  		FD_ZERO(&confds);
  		openssl_fdset(fd, &confds);
  		tv.tv_usec = 0;
  		tv.tv_sec = req_timeout;
  		rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
  		if (rv == 0)
  			{
  			BIO_puts(err, "Timeout on connect\n");
  			return NULL;
  			}
  		}
  
  
  	ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
  	if (!ctx)
  		return NULL;
  
  	for (i = 0; i < sk_CONF_VALUE_num(headers); i++)
  		{
  		CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
  		if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
  			goto err;
  		}
  
  	if (!OCSP_REQ_CTX_set1_req(ctx, req))
  		goto err;
  	
  	for (;;)
  		{
  		rv = OCSP_sendreq_nbio(&rsp, ctx);
  		if (rv != -1)
  			break;
  		if (req_timeout == -1)
  			continue;
  		FD_ZERO(&confds);
  		openssl_fdset(fd, &confds);
  		tv.tv_usec = 0;
  		tv.tv_sec = req_timeout;
  		if (BIO_should_read(cbio))
  			rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
  		else if (BIO_should_write(cbio))
  			rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
  		else
  			{
  			BIO_puts(err, "Unexpected retry condition\n");
  			goto err;
  			}
  		if (rv == 0)
  			{
  			BIO_puts(err, "Timeout on request\n");
  			break;
  			}
  		if (rv == -1)
  			{
  			BIO_puts(err, "Select error\n");
  			break;
  			}
  
  		}
  	err:
  	if (ctx)
  		OCSP_REQ_CTX_free(ctx);
  
  	return rsp;
  	}
  
  OCSP_RESPONSE *process_responder(BIO *err, OCSP_REQUEST *req,
  				 const char *host, const char *path,
  				 const char *port, int use_ssl,
  				 const STACK_OF(CONF_VALUE) *headers,
  				 int req_timeout)
  	{
  	BIO *cbio = NULL;
  	SSL_CTX *ctx = NULL;
  	OCSP_RESPONSE *resp = NULL;
  	cbio = BIO_new_connect(host);
  	if (!cbio)
  		{
  		BIO_printf(err, "Error creating connect BIO\n");
  		goto end;
  		}
  	if (port) BIO_set_conn_port(cbio, port);
  	if (use_ssl == 1)
  		{
  		BIO *sbio;
  #if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
  		ctx = SSL_CTX_new(SSLv23_client_method());
  #elif !defined(OPENSSL_NO_SSL3)
  		ctx = SSL_CTX_new(SSLv3_client_method());
  #elif !defined(OPENSSL_NO_SSL2)
  		ctx = SSL_CTX_new(SSLv2_client_method());
  #else
  		BIO_printf(err, "SSL is disabled\n");
  			goto end;
  #endif
  		if (ctx == NULL)
  			{
  			BIO_printf(err, "Error creating SSL context.\n");
  			goto end;
  			}
  		SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
  		sbio = BIO_new_ssl(ctx, 1);
  		cbio = BIO_push(sbio, cbio);
  		}
  	resp = query_responder(err, cbio, path, headers, req, req_timeout);
  	if (!resp)
  		BIO_printf(bio_err, "Error querying OCSP responder\n");
  	end:
  	if (cbio)
  		BIO_free_all(cbio);
  	if (ctx)
  		SSL_CTX_free(ctx);
  	return resp;
  	}
  
  #endif
  