diff --git a/ap/lib/libssl/openssl-1.1.1o/apps/ocsp.c b/ap/lib/libssl/openssl-1.1.1o/apps/ocsp.c
new file mode 100644
index 0000000..27ec94f
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/apps/ocsp.c
@@ -0,0 +1,1623 @@
+/*
+ * Copyright 2001-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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
+# define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
+                                 * on OpenVMS */
+#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 "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>
+#include <openssl/rand.h>
+
+#ifndef HAVE_FORK
+#if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
+# define HAVE_FORK 0
+#else
+# define HAVE_FORK 1
+#endif
+#endif
+
+#if HAVE_FORK
+#undef NO_FORK
+#else
+#define NO_FORK
+#endif
+
+#if !defined(NO_FORK) && !defined(OPENSSL_NO_SOCK) \
+     && !defined(OPENSSL_NO_POSIX_IO)
+# define OCSP_DAEMON
+# include <sys/types.h>
+# include <sys/wait.h>
+# include <syslog.h>
+# include <signal.h>
+# define MAXERRLEN 1000 /* limit error text sent to syslog to 1000 bytes */
+#else
+# undef LOG_INFO
+# undef LOG_WARNING
+# undef LOG_ERR
+# define LOG_INFO      0
+# define LOG_WARNING   1
+# define LOG_ERR       2
+#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 void 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);
+
+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, int timeout);
+static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
+static void log_message(int level, const char *fmt, ...);
+static char *prog;
+static int multi = 0;
+
+#ifdef OCSP_DAEMON
+static int acfd = (int) INVALID_SOCKET;
+static int index_changed(CA_DB *);
+static void spawn_loop(void);
+static int print_syslog(const char *str, size_t len, void *levPtr);
+static void socket_timeout(int signum);
+#endif
+
+#ifndef OPENSSL_NO_SOCK
+static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
+                                      const char *path,
+                                      const STACK_OF(CONF_VALUE) *headers,
+                                      OCSP_REQUEST *req, int req_timeout);
+#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_NOCAFILE, OPT_NOCAPATH,
+    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_V_ENUM,
+    OPT_MD,
+    OPT_MULTI
+} OPTION_CHOICE;
+
+const OPTIONS ocsp_options[] = {
+    {"help", OPT_HELP, '-', "Display this summary"},
+    {"out", OPT_OUTFILE, '>', "Output filename"},
+    {"timeout", OPT_TIMEOUT, 'p',
+     "Connection timeout (in seconds) to the OCSP responder"},
+    {"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"},
+    {"ignore_err", OPT_IGNORE_ERR, '-',
+     "Ignore error on OCSP request or response and continue running"},
+    {"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"},
+    {"resp_no_certs", OPT_RESP_NO_CERTS, '-',
+     "Don't include any certificates in response"},
+    {"resp_key_id", OPT_RESP_KEY_ID, '-',
+     "Identify response by signing certificate key ID"},
+#ifdef OCSP_DAEMON
+    {"multi", OPT_MULTI, 'p', "run multiple responder processes"},
+#endif
+    {"no_certs", OPT_NO_CERTS, '-',
+     "Don't include any certificates in signed request"},
+    {"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
+     "Don't check signature on response"},
+    {"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
+     "Don't check signing certificate"},
+    {"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"},
+    {"badsig", OPT_BADSIG, '-',
+        "Corrupt last byte of loaded OSCP response signature (for test)"},
+    {"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"},
+    {"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
+    {"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
+    {"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
+    {"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
+    {"sign_other", OPT_SIGN_OTHER, '<',
+     "Additional certificates to include in signed request"},
+    {"verify_other", OPT_VERIFY_OTHER, '<',
+     "Additional certificates to search for signer"},
+    {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
+    {"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
+    {"no-CAfile", OPT_NOCAFILE, '-',
+     "Do not load the default certificates file"},
+    {"no-CApath", OPT_NOCAPATH, '-',
+     "Do not load certificates from the default certificates directory"},
+    {"validity_period", OPT_VALIDITY_PERIOD, 'u',
+     "Maximum validity discrepancy in seconds"},
+    {"status_age", OPT_STATUS_AGE, 'p', "Maximum status age 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"},
+    {"path", OPT_PATH, 's', "Path to use in OCSP request"},
+    {"issuer", OPT_ISSUER, '<', "Issuer certificate"},
+    {"cert", OPT_CERT, '<', "Certificate to check"},
+    {"serial", OPT_SERIAL, 's', "Serial number to check"},
+    {"index", OPT_INDEX, '<', "Certificate status index file"},
+    {"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)"},
+    {"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"},
+    {"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"},
+    {"", OPT_MD, '-', "Any supported digest algorithm (sha1,sha256, ... )"},
+    OPT_V_OPTIONS,
+    {NULL}
+};
+
+int ocsp_main(int argc, char **argv)
+{
+    BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
+    const 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;
+    X509 *signer = NULL, *rsigner = NULL;
+    X509_STORE *store = NULL;
+    X509_VERIFY_PARAM *vpm = NULL;
+    const char *CAfile = NULL, *CApath = NULL;
+    char *header, *value;
+    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 *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;
+    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, 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;
+
+    reqnames = sk_OPENSSL_STRING_new_null();
+    if (reqnames == NULL)
+        goto end;
+    ids = sk_OCSP_CERTID_new_null();
+    if (ids == NULL)
+        goto end;
+    if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
+        return 1;
+
+    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 (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
+                BIO_printf(bio_err, "%s Error parsing URL\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_NOCAFILE:
+            noCAfile = 1;
+            break;
+        case OPT_NOCAPATH:
+            noCApath = 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(), FORMAT_PEM, "issuer certificate");
+            if (issuer == NULL)
+                goto end;
+            if (issuers == NULL) {
+                if ((issuers = sk_X509_new_null()) == NULL)
+                    goto end;
+            }
+            sk_X509_push(issuers, issuer);
+            break;
+        case OPT_CERT:
+            X509_free(cert);
+            cert = load_cert(opt_arg(), FORMAT_PEM, "certificate");
+            if (cert == NULL)
+                goto end;
+            if (cert_id_md == NULL)
+                cert_id_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_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:
+            opt_int(opt_arg(), &nmin);
+            if (ndays == -1)
+                ndays = 0;
+            break;
+        case OPT_REQUEST:
+            opt_int(opt_arg(), &accept_count);
+            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_ROTHER:
+            rcertfile = opt_arg();
+            break;
+        case OPT_RMD:   /* Response MessageDigest */
+            if (!opt_md(opt_arg(), &rsign_md))
+                goto end;
+            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_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 OCSP_DAEMON
+            multi = atoi(opt_arg());
+#endif
+            break;
+        }
+    }
+    if (trailing_md) {
+        BIO_printf(bio_err, "%s: Digest must be before -cert or -serial\n",
+                   prog);
+        goto opthelp;
+    }
+    argc = opt_num_rest();
+    if (argc != 0)
+        goto opthelp;
+
+    /* 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) {
+        acbio = init_responder(port);
+        if (acbio == NULL)
+            goto end;
+    }
+
+    if (rsignfile != NULL) {
+        if (rkeyfile == NULL)
+            rkeyfile = rsignfile;
+        rsigner = load_cert(rsignfile, FORMAT_PEM, "responder certificate");
+        if (rsigner == NULL) {
+            BIO_printf(bio_err, "Error loading responder certificate\n");
+            goto end;
+        }
+        if (!load_certs(rca_filename, &rca_cert, FORMAT_PEM,
+                        NULL, "CA certificate"))
+            goto end;
+        if (rcertfile != NULL) {
+            if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL,
+                            "responder other certificates"))
+                goto end;
+        }
+        rkey = load_key(rkeyfile, FORMAT_PEM, 0, NULL, 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 OCSP_DAEMON
+    if (multi && acbio != NULL)
+        spawn_loop();
+    if (acbio != NULL && req_timeout > 0)
+        signal(SIGALRM, socket_timeout);
+#endif
+
+    if (acbio != NULL)
+        log_message(LOG_INFO, "waiting for OCSP client connections...");
+
+redo_accept:
+
+    if (acbio != NULL) {
+#ifdef OCSP_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(LOG_ERR, "error reloading updated index: %s",
+                            ridx_filename);
+            }
+        }
+#endif
+
+        req = NULL;
+        if (!do_responder(&req, &cbio, acbio, req_timeout))
+            goto redo_accept;
+
+        if (req == NULL) {
+            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, FORMAT_PEM, "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, &sign_other, FORMAT_PEM, 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);
+        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, CApath, noCAfile, noCApath);
+        if (!store)
+            goto end;
+    }
+    if (vpmtouched)
+        X509_STORE_set1_param(store, vpm);
+    if (verify_certfile != NULL) {
+        if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL,
+                        "validator certificate"))
+            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");
+        }
+    }
+
+    print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
+
+ 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);
+    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;
+}
+
+static void
+log_message(int level, const char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+#ifdef OCSP_DAEMON
+    if (multi) {
+        char buf[1024];
+        if (vsnprintf(buf, sizeof(buf), fmt, ap) > 0) {
+            syslog(level, "%s", buf);
+        }
+        if (level >= LOG_ERR)
+            ERR_print_errors_cb(print_syslog, &level);
+    }
+#endif
+    if (!multi) {
+        BIO_printf(bio_err, "%s: ", prog);
+        BIO_vprintf(bio_err, fmt, ap);
+        BIO_printf(bio_err, "\n");
+    }
+    va_end(ap);
+}
+
+#ifdef OCSP_DAEMON
+
+static int print_syslog(const char *str, size_t len, void *levPtr)
+{
+    int level = *(int *)levPtr;
+    int ilen = (len > MAXERRLEN) ? MAXERRLEN : len;
+
+    syslog(level, "%.*s", ilen, str);
+
+    return ilen;
+}
+
+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;
+}
+
+static void killall(int ret, pid_t *kidpids)
+{
+    int i;
+
+    for (i = 0; i < multi; ++i)
+        if (kidpids[i] != 0)
+            (void)kill(kidpids[i], SIGTERM);
+    OPENSSL_free(kidpids);
+    sleep(1);
+    exit(ret);
+}
+
+static int termsig = 0;
+
+static void noteterm (int sig)
+{
+    termsig = sig;
+}
+
+/*
+ * Loop spawning up to `multi` child processes, only child processes return
+ * from this function.  The parent process loops until receiving a termination
+ * signal, kills extant children and exits without returning.
+ */
+static void spawn_loop(void)
+{
+    pid_t *kidpids = NULL;
+    int status;
+    int procs = 0;
+    int i;
+
+    openlog(prog, LOG_PID, LOG_DAEMON);
+
+    if (setpgid(0, 0)) {
+        syslog(LOG_ERR, "fatal: error detaching from parent process group: %s",
+               strerror(errno));
+        exit(1);
+    }
+    kidpids = app_malloc(multi * sizeof(*kidpids), "child PID array");
+    for (i = 0; i < multi; ++i)
+        kidpids[i] = 0;
+
+    signal(SIGINT, noteterm);
+    signal(SIGTERM, noteterm);
+
+    while (termsig == 0) {
+        pid_t fpid;
+
+        /*
+         * Wait for a child to replace when we're at the limit.
+         * Slow down if a child exited abnormally or waitpid() < 0
+         */
+        while (termsig == 0 && procs >= multi) {
+            if ((fpid = waitpid(-1, &status, 0)) > 0) {
+                for (i = 0; i < procs; ++i) {
+                    if (kidpids[i] == fpid) {
+                        kidpids[i] = 0;
+                        --procs;
+                        break;
+                    }
+                }
+                if (i >= multi) {
+                    syslog(LOG_ERR, "fatal: internal error: "
+                           "no matching child slot for pid: %ld",
+                           (long) fpid);
+                    killall(1, kidpids);
+                }
+                if (status != 0) {
+                    if (WIFEXITED(status))
+                        syslog(LOG_WARNING, "child process: %ld, exit status: %d",
+                               (long)fpid, WEXITSTATUS(status));
+                    else if (WIFSIGNALED(status))
+                        syslog(LOG_WARNING, "child process: %ld, term signal %d%s",
+                               (long)fpid, WTERMSIG(status),
+#ifdef WCOREDUMP
+                               WCOREDUMP(status) ? " (core dumped)" :
+#endif
+                               "");
+                    sleep(1);
+                }
+                break;
+            } else if (errno != EINTR) {
+                syslog(LOG_ERR, "fatal: waitpid(): %s", strerror(errno));
+                killall(1, kidpids);
+            }
+        }
+        if (termsig)
+            break;
+
+        switch(fpid = fork()) {
+        case -1:            /* error */
+            /* System critically low on memory, pause and try again later */
+            sleep(30);
+            break;
+        case 0:             /* child */
+            OPENSSL_free(kidpids);
+            signal(SIGINT, SIG_DFL);
+            signal(SIGTERM, SIG_DFL);
+            if (termsig)
+                _exit(0);
+            if (RAND_poll() <= 0) {
+                syslog(LOG_ERR, "fatal: RAND_poll() failed");
+                _exit(1);
+            }
+            return;
+        default:            /* parent */
+            for (i = 0; i < multi; ++i) {
+                if (kidpids[i] == 0) {
+                    kidpids[i] = fpid;
+                    procs++;
+                    break;
+                }
+            }
+            if (i >= multi) {
+                syslog(LOG_ERR, "fatal: internal error: no free child slots");
+                killall(1, kidpids);
+            }
+            break;
+        }
+    }
+
+    /* The loop above can only break on termsig */
+    syslog(LOG_INFO, "terminating on signal: %d", termsig);
+    killall(0, kidpids);
+}
+#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;
+    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 void 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;
+
+    if (bs == NULL || req == NULL || !sk_OPENSSL_STRING_num(names)
+        || !sk_OCSP_CERTID_num(ids))
+        return;
+
+    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");
+    }
+}
+
+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)
+{
+    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;
+        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;
+
+            OCSP_CERTID_free(ca_id);
+        }
+
+        if (!found) {
+            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 == 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_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;
+}
+
+/* Quick and dirty OCSP server: read in and parse input request */
+
+static BIO *init_responder(const char *port)
+{
+#ifdef OPENSSL_NO_SOCK
+    BIO_printf(bio_err,
+               "Error setting up accept BIO - sockets not supported.\n");
+    return NULL;
+#else
+    BIO *acbio = NULL, *bufbio = NULL;
+
+    bufbio = BIO_new(BIO_f_buffer());
+    if (bufbio == NULL)
+        goto err;
+    acbio = BIO_new(BIO_s_accept());
+    if (acbio == NULL
+        || BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
+        || BIO_set_accept_port(acbio, port) < 0) {
+        log_message(LOG_ERR, "Error setting up accept BIO");
+        goto err;
+    }
+
+    BIO_set_accept_bios(acbio, bufbio);
+    bufbio = NULL;
+    if (BIO_do_accept(acbio) <= 0) {
+        log_message(LOG_ERR, "Error starting accept");
+        goto err;
+    }
+
+    return acbio;
+
+ err:
+    BIO_free_all(acbio);
+    BIO_free(bufbio);
+    return NULL;
+#endif
+}
+
+#ifndef OPENSSL_NO_SOCK
+/*
+ * Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
+ */
+static int urldecode(char *p)
+{
+    unsigned char *out = (unsigned char *)p;
+    unsigned char *save = out;
+
+    for (; *p; p++) {
+        if (*p != '%')
+            *out++ = *p;
+        else if (isxdigit(_UC(p[1])) && isxdigit(_UC(p[2]))) {
+            /* Don't check, can't fail because of ixdigit() call. */
+            *out++ = (OPENSSL_hexchar2int(p[1]) << 4)
+                   | OPENSSL_hexchar2int(p[2]);
+            p += 2;
+        }
+        else
+            return -1;
+    }
+    *out = '\0';
+    return (int)(out - save);
+}
+#endif
+
+#ifdef OCSP_DAEMON
+static void socket_timeout(int signum)
+{
+    if (acfd != (int)INVALID_SOCKET)
+        (void)shutdown(acfd, SHUT_RD);
+}
+#endif
+
+static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
+                        int timeout)
+{
+#ifdef OPENSSL_NO_SOCK
+    return 0;
+#else
+    int len;
+    OCSP_REQUEST *req = NULL;
+    char inbuf[2048], reqbuf[2048];
+    char *p, *q;
+    BIO *cbio = NULL, *getbio = NULL, *b64 = NULL;
+    const char *client;
+
+    *preq = NULL;
+
+    /* Connection loss before accept() is routine, ignore silently */
+    if (BIO_do_accept(acbio) <= 0)
+        return 0;
+
+    cbio = BIO_pop(acbio);
+    *pcbio = cbio;
+    client = BIO_get_peer_name(cbio);
+
+# ifdef OCSP_DAEMON
+    if (timeout > 0) {
+        (void) BIO_get_fd(cbio, &acfd);
+        alarm(timeout);
+    }
+# endif
+
+    /* Read the request line. */
+    len = BIO_gets(cbio, reqbuf, sizeof(reqbuf));
+    if (len <= 0)
+        goto out;
+
+    if (strncmp(reqbuf, "GET ", 4) == 0) {
+        /* Expecting GET {sp} /URL {sp} HTTP/1.x */
+        for (p = reqbuf + 4; *p == ' '; ++p)
+            continue;
+        if (*p != '/') {
+            log_message(LOG_INFO, "Invalid request -- bad URL: %s", client);
+            goto out;
+        }
+        p++;
+
+        /* Splice off the HTTP version identifier. */
+        for (q = p; *q; q++)
+            if (*q == ' ')
+                break;
+        if (strncmp(q, " HTTP/1.", 8) != 0) {
+            log_message(LOG_INFO,
+                        "Invalid request -- bad HTTP version: %s", client);
+            goto out;
+        }
+        *q = '\0';
+
+        /*
+         * Skip "GET / HTTP..." requests often used by load-balancers.  Note:
+         * 'p' was incremented above to point to the first byte *after* the
+         * leading slash, so with 'GET / ' it is now an empty string.
+         */
+        if (p[0] == '\0')
+            goto out;
+
+        len = urldecode(p);
+        if (len <= 0) {
+            log_message(LOG_INFO,
+                        "Invalid request -- bad URL encoding: %s", client);
+            goto out;
+        }
+        if ((getbio = BIO_new_mem_buf(p, len)) == NULL
+            || (b64 = BIO_new(BIO_f_base64())) == NULL) {
+            log_message(LOG_ERR, "Could not allocate base64 bio: %s", client);
+            goto out;
+        }
+        BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
+        getbio = BIO_push(b64, getbio);
+    } else if (strncmp(reqbuf, "POST ", 5) != 0) {
+        log_message(LOG_INFO, "Invalid request -- bad HTTP verb: %s", client);
+        goto out;
+    }
+
+    /* Read and skip past the headers. */
+    for (;;) {
+        len = BIO_gets(cbio, inbuf, sizeof(inbuf));
+        if (len <= 0)
+            goto out;
+        if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
+            break;
+    }
+
+# ifdef OCSP_DAEMON
+    /* Clear alarm before we close the client socket */
+    alarm(0);
+    timeout = 0;
+# endif
+
+    /* Try to read OCSP request */
+    if (getbio != NULL) {
+        req = d2i_OCSP_REQUEST_bio(getbio, NULL);
+        BIO_free_all(getbio);
+    } else {
+        req = d2i_OCSP_REQUEST_bio(cbio, NULL);
+    }
+
+    if (req == NULL)
+        log_message(LOG_ERR, "Error parsing OCSP request");
+
+    *preq = req;
+
+out:
+# ifdef OCSP_DAEMON
+    if (timeout > 0)
+        alarm(0);
+    acfd = (int)INVALID_SOCKET;
+# endif
+    return 1;
+#endif
+}
+
+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 == NULL)
+        return 0;
+    BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
+    i2d_OCSP_RESPONSE_bio(cbio, resp);
+    (void)BIO_flush(cbio);
+    return 1;
+}
+
+#ifndef OPENSSL_NO_SOCK
+static OCSP_RESPONSE *query_responder(BIO *cbio, const char *host,
+                                      const char *path,
+                                      const STACK_OF(CONF_VALUE) *headers,
+                                      OCSP_REQUEST *req, int req_timeout)
+{
+    int fd;
+    int rv;
+    int i;
+    int add_host = 1;
+    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(bio_err, "Error connecting BIO\n");
+        return NULL;
+    }
+
+    if (BIO_get_fd(cbio, &fd) < 0) {
+        BIO_puts(bio_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(bio_err, "Timeout on connect\n");
+            return NULL;
+        }
+    }
+
+    ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
+    if (ctx == NULL)
+        return NULL;
+
+    for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
+        CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
+        if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
+            add_host = 0;
+        if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
+            goto err;
+    }
+
+    if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
+        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(bio_err, "Unexpected retry condition\n");
+            goto err;
+        }
+        if (rv == 0) {
+            BIO_puts(bio_err, "Timeout on request\n");
+            break;
+        }
+        if (rv == -1) {
+            BIO_puts(bio_err, "Select error\n");
+            break;
+        }
+
+    }
+ err:
+    OCSP_REQ_CTX_free(ctx);
+
+    return rsp;
+}
+
+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)
+{
+    BIO *cbio = NULL;
+    SSL_CTX *ctx = NULL;
+    OCSP_RESPONSE *resp = NULL;
+
+    cbio = BIO_new_connect(host);
+    if (cbio == NULL) {
+        BIO_printf(bio_err, "Error creating connect BIO\n");
+        goto end;
+    }
+    if (port != NULL)
+        BIO_set_conn_port(cbio, port);
+    if (use_ssl == 1) {
+        BIO *sbio;
+        ctx = SSL_CTX_new(TLS_client_method());
+        if (ctx == NULL) {
+            BIO_printf(bio_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(cbio, host, path, headers, req, req_timeout);
+    if (resp == NULL)
+        BIO_printf(bio_err, "Error querying OCSP responder\n");
+ end:
+    BIO_free_all(cbio);
+    SSL_CTX_free(ctx);
+    return resp;
+}
+#endif