return -1;
	verify = verify;
}

/*
 *-------------------------------------------------------------------
 *
 * SessionCallback for Clients --
 *
 *	Called when a new session ticket has been received. In TLS 1.3
 *	this may be received multiple times after the handshake. For
 *	earlier versions, this will be received during the handshake.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	Calls callback (if defined)
 *-------------------------------------------------------------------
 */
static int
SessionCallback(const SSL *ssl, SSL_SESSION *session) {
    State *statePtr = (State*)SSL_get_app_data((SSL *)ssl);
    Tcl_Interp *interp	= statePtr->interp;
    Tcl_Obj *cmdPtr;
    const unsigned char *ticket;
    const unsigned char *session_id;
    int len;
    int code;
    size_t len2;

    dprintf("Called");

    if (statePtr->callback == (Tcl_Obj*)NULL)
	return 0;

    cmdPtr = Tcl_DuplicateObj(statePtr->callback);

    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj( "session", -1));

    /* Session id */
    session = SSL_get_session(statePtr->ssl);
    session_id = SSL_SESSION_get0_id_context(session, &len);
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(session_id, len));

    /* Session ticket */
    SSL_SESSION_get0_ticket(session, &ticket, &len2);
    Tcl_ListObjAppendElement(interp, cmdPtr, Tcl_NewStringObj(ticket, (int)len2));

    /* Lifetime - number of seconds */
    Tcl_ListObjAppendElement(interp, cmdPtr,
	Tcl_NewLongObj((long) SSL_SESSION_get_ticket_lifetime_hint(session)));

    Tcl_Preserve((ClientData) interp);
    Tcl_Preserve((ClientData) statePtr);

    Tcl_IncrRefCount(cmdPtr);
    code = Tcl_EvalObjEx(interp, cmdPtr, TCL_EVAL_GLOBAL);
    if (code != TCL_OK) {
#if (TCL_MAJOR_VERSION == 8) && (TCL_MINOR_VERSION < 6)
	Tcl_BackgroundError(interp);
#else
	Tcl_BackgroundException(interp, code);
#endif
    }
    Tcl_DecrRefCount(cmdPtr);

    Tcl_Release((ClientData) statePtr);
    Tcl_Release((ClientData) interp);
    return 1;
}

/*
 *-------------------------------------------------------------------
 *
 * CiphersObjCmd -- list available ciphers
 *
 *	This procedure is invoked to process the "tls::ciphers" command
 *	to list available ciphers, based upon protocol selected.
 *
 * Results:
 *	A standard Tcl result list.

    char *ciphers	        = NULL;
    char *ciphersuites	        = NULL;
    char *CAfile	        = NULL;
    char *CAdir		        = NULL;
    char *DHparams	        = NULL;
    char *model		        = NULL;
    char *servername	        = NULL;	/* hostname for Server Name Indication */
    const unsigned char *session_id = NULL;
    Tcl_Obj *alpn		= NULL;
    int ssl2 = 0, ssl3 = 0;
    int tls1 = 1, tls1_1 = 1, tls1_2 = 1, tls1_3 = 1;
    int proto = 0, level = -1;
    int verify = 0, require = 0, request = 1;

    dprintf("Called");

	OPTSTR("-model", model);
	OPTOBJ("-password", password);
	OPTBOOL("-require", require);
	OPTBOOL("-request", request);
	OPTINT("-securitylevel", level);
	OPTBOOL("-server", server);
	OPTSTR("-servername", servername);
	OPTSTR("-session_id", session_id);
	OPTOBJ("-alpn", alpn);
	OPTBOOL("-ssl2", ssl2);
	OPTBOOL("-ssl3", ssl3);
	OPTBOOL("-tls1", tls1);
	OPTBOOL("-tls1.1", tls1_1);
	OPTBOOL("-tls1.2", tls1_2);
	OPTBOOL("-tls1.3", tls1_3);
	OPTBYTE("-cert", cert, cert_len);
	OPTBYTE("-key", key, key_len);

	OPTBAD("option", "-alpn, -cadir, -cafile, -cert, -certfile, -cipher, -ciphersuites, -command, -dhparams, -key, -keyfile, -model, -password, -require, -request, -securitylevel, -server, -servername, -session_id, -ssl2, -ssl3, -tls1, -tls1.1, -tls1.2, or -tls1.3");

	return TCL_ERROR;
    }
    if (request)	    verify |= SSL_VERIFY_CLIENT_ONCE | SSL_VERIFY_PEER;
    if (request && require) verify |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
    if (verify == 0)	verify = SSL_VERIFY_NONE;

    if (!statePtr->ssl) {
	/* SSL library error */
	Tcl_AppendResult(interp, "couldn't construct ssl session: ", REASON(), (char *) NULL);
	Tls_Free((char *) statePtr);
	return TCL_ERROR;
    }

    /* Set host server name */
    if (servername) {
	if (!SSL_set_tlsext_host_name(statePtr->ssl, servername) && require) {
	    Tcl_AppendResult(interp, "setting TLS host name extension failed", (char *) NULL);
            Tls_Free((char *) statePtr);
            return TCL_ERROR;
        }
    }

    /* Resume session id */
    if (session_id && strlen(session_id) <= SSL_MAX_SID_CTX_LENGTH) {
	/* SSL_set_session() */
	if (!SSL_SESSION_set1_id_context(SSL_get_session(statePtr->ssl), session_id, (unsigned int) strlen(session_id))) {
	    Tcl_AppendResult(interp, "Resume session id ", session_id, " failed", (char *) NULL);
            Tls_Free((char *) statePtr);
            return TCL_ERROR;
	}
    }

    if (alpn) {
	/* Convert a Tcl list into a protocol-list in wire-format */
	unsigned char *protos, *p;
	unsigned int protos_len = 0;
	int i, len, cnt;
	Tcl_Obj **list;
	if (Tcl_ListObjGetElements(interp, alpn, &cnt, &list) != TCL_OK) {

    /*
     * SSL Callbacks
     */
    SSL_set_app_data(statePtr->ssl, (void *)statePtr);	/* point back to us */
    SSL_set_verify(statePtr->ssl, verify, VerifyCallback);
    SSL_CTX_set_info_callback(statePtr->ctx, InfoCallback);
    SSL_CTX_sess_set_new_cb(statePtr->ctx, SessionCallback);

    /* Create Tcl_Channel BIO Handler */
    statePtr->p_bio	= BIO_new_tcl(statePtr, BIO_NOCLOSE);
    statePtr->bio	= BIO_new(BIO_f_ssl());

    if (server) {
	statePtr->flags |= TLS_TCL_SERVER;

    ciphers = (char*)SSL_get_cipher(statePtr->ssl);
    if ((ciphers != NULL) && (strcmp(ciphers, "(NONE)") != 0)) {
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("cipher", -1));
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_cipher(statePtr->ssl), -1));
    }

    /* Verify the X509 certificate presented by the peer */
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("validation", -1));
    if (SSL_get_verify_result(statePtr->ssl) != X509_V_OK) {
	/* proto = "failed"; */
	proto = REASON();
    } else {
	proto = "ok";
    }
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(proto, -1));

    /* Report the selected protocol as a result of the negotiation */
    SSL_get0_alpn_selected(statePtr->ssl, &proto, &len);
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("alpn", -1));
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *)proto, (int)len));
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("version", -1));
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(SSL_get_version(statePtr->ssl), -1));

static int ConnectionInfoObjCmd(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
    Tcl_Channel chan;		/* The channel to set a mode on. */
    State *statePtr;		/* client state for ssl socket */
    Tcl_Obj *objPtr;
    const SSL *ssl;
    const SSL_CIPHER *cipher;
    const SSL_SESSION *session;
    const unsigned char *proto;
    unsigned int len;
#if defined(HAVE_SSL_COMPRESSION)
    const COMP_METHOD *comp;
#endif

    if (objc != 2) {

	    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("description", -1));
	    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(buf, -1));
	}
    }

    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("renegotiation", -1));
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(
	SSL_get_secure_renegotiation_support(ssl) ? "allowed" : "not supported", -1));

    /* Report the selected protocol as a result of the negotiation */
    SSL_get0_alpn_selected(ssl, &proto, &len);
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("alpn", -1));
    Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj((char *)proto, (int)len));

    /* Session info */
    session = SSL_get_session(ssl);
    if (session != NULL) {
	const unsigned char *ticket;
	size_t len2;
	const unsigned char *session_id;

	/* Session info */
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("session_reused", -1));
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(SSL_session_reused(ssl)));

	/* Session id */
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("session_id", -1));
	session_id = SSL_SESSION_get0_id_context(session, &len);
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(session_id, (int)len));

	/* Session ticket */
	SSL_SESSION_get0_ticket(session, &ticket, &len2);
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("session_ticket", -1));
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj(ticket, (int) len2));

	/* Resumable session */
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("resumable", -1));
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewIntObj(SSL_SESSION_is_resumable(session)));

	/* Start time */
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("start_time", -1));
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewLongObj(SSL_SESSION_get_time(session)));

	/* Timeout value */
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("timeout", -1));
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewLongObj(SSL_SESSION_get_timeout(session)));
    }

#if defined(HAVE_SSL_COMPRESSION)
    /* Compression info */
    comp = SSL_get_current_compression(ssl);
    if (comp != NULL) {
	expansion = SSL_get_current_expansion(ssl);
	Tcl_ListObjAppendElement(interp, objPtr, Tcl_NewStringObj("compression", -1));