ocsp.c

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/* ocsp.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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

#include <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/pem.h>
#include <openssl/ocsp.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include <openssl/bn.h>

/* Maximum leeway in validity period: default 5 minutes */
#define MAX_VALIDITY_PERIOD     (5 * 60)

static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert, X509 *issuer,
                                STACK_OF(OCSP_CERTID) *ids);
static int add_ocsp_serial(OCSP_REQUEST **req, char *serial, X509 *issuer,
                                STACK_OF(OCSP_CERTID) *ids);
static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
                                STACK *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,
                        STACK_OF(X509) *rother, unsigned long flags,
                        int nmin, int ndays);

static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
static BIO *init_responder(char *port);
static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, char *port);
static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);

#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 *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;
        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_text = 0, resp_text = 0;
        long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
        char *CAfile = NULL, *CApath = NULL;
        X509_STORE *store = NULL;
        SSL_CTX *ctx = 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 i;
        int ignore_err = 0;
        STACK *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;

        if (bio_err == NULL) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);

        if (!load_config(bio_err, NULL))
                goto end;
        SSL_load_error_strings();
        args = argv + 1;
        reqnames = sk_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, "-url"))
                        {
                        if (args[1])
                                {
                                args++;
                                if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl))
                                        {
                                        BIO_printf(bio_err, "Error parsing URL\n");
                                        badarg = 1;
                                        }
                                }
                        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, "-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, "-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 (!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(!add_ocsp_cert(&req, cert, issuer, ids))
                                        goto end;
                                if(!sk_push(reqnames, *args))
                                        goto end;
                                }
                        else badarg = 1;
                        }
                else if (!strcmp(*args, "-serial"))
                        {
                        if (args[1])
                                {
                                args++;
                                if(!add_ocsp_serial(&req, *args, issuer, ids))
                                        goto end;
                                if(!sk_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 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");
                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)
                {
                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, EVP_sha1(), 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)
                {
                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, rother, rflags, nmin, ndays);
                if (cbio)
                        send_ocsp_response(cbio, resp);
                }
        else if (host)
                {
#ifndef OPENSSL_NO_SOCK
                cbio = BIO_new_connect(host);
#else
                BIO_printf(bio_err, "Error creating connect BIO - sockets not supported.\n");
                goto end;
#endif
                if (!cbio)
                        {
                        BIO_printf(bio_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(bio_err, "SSL is disabled\n");
                        goto end;
#endif
                        SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
                        sbio = BIO_new_ssl(ctx, 1);
                        cbio = BIO_push(sbio, cbio);
                        }
                if (BIO_do_connect(cbio) <= 0)
                        {
                        BIO_printf(bio_err, "Error connecting BIO\n");
                        goto end;
                        }
                resp = OCSP_sendreq_bio(cbio, path, req);
                BIO_free_all(cbio);
                cbio = NULL;
                if (!resp)
                        {
                        BIO_printf(bio_err, "Error querying OCSP responsder\n");
                        goto end;
                        }
                }
        else if (respin)
                {
                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)
                {
                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;
                        }
                goto end;
                }

        if (!store)
                store = setup_verify(bio_err, CAfile, CApath);
        if (!store)
                goto end;
        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;
                }

        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");
                                goto end;
                                }
                        }

                i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
                if (i < 0) i = OCSP_basic_verify(bs, NULL, store, 0);

                if(i <= 0)
                        {
                        BIO_printf(bio_err, "Response Verify Failure\n");
                        ERR_print_errors(bio_err);
                        }
                else
                        BIO_printf(bio_err, "Response verify OK\n");

                }

        if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
                goto end;

        ret = 0;

end:
        ERR_print_errors(bio_err);
        X509_free(signer);
        X509_STORE_free(store);
        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_free(reqnames);
        sk_OCSP_CERTID_free(ids);
        sk_X509_pop_free(sign_other, X509_free);
        sk_X509_pop_free(verify_other, X509_free);

        if (use_ssl != -1)
                {
                OPENSSL_free(host);
                OPENSSL_free(port);
                OPENSSL_free(path);
                SSL_CTX_free(ctx);
                }

        OPENSSL_EXIT(ret);
}

static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert, 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(NULL, 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, 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(EVP_sha1(), 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 *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_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_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,
                        STACK_OF(X509) *rother, unsigned long flags,
                        int nmin, int ndays)
        {
        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;
                }

        ca_id = OCSP_cert_to_id(EVP_sha1(), NULL, ca);

        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;
                one = OCSP_request_onereq_get0(req, i);
                cid = OCSP_onereq_get0_id(one);
                /* 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, EVP_sha1(), rother, flags);

        *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);
        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(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