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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.activemq.transport.tcp;

import java.io.IOException;
import java.net.Socket;
import java.net.URI;
import java.net.URISyntaxException;

import javax.net.ssl.SSLServerSocket;
import javax.net.ssl.SSLServerSocketFactory;
import javax.net.ssl.SSLSocket;

import org.apache.activemq.transport.Transport;
import org.apache.activemq.wireformat.WireFormat;

/**
 *  An SSL TransportServer.
 *
 *  Allows for client certificate authentication (refer to setNeedClientAuth for
 *      details).
 *  NOTE: Client certificate authentication is disabled by default.
 *
 */
public class SslTransportServer extends TcpTransportServer {

    // Specifies if sockets created from this server should needClientAuth.
    private boolean needClientAuth;

    // Specifies if sockets created from this server should wantClientAuth.
    private boolean wantClientAuth;

    /**
     * Creates a ssl transport server for the specified url using the provided
     * serverSocketFactory
     *
     * @param transportFactory The factory used to create transports when connections arrive.
     * @param location The location of the broker to bind to.
     * @param serverSocketFactory The factory used to create this server.
     * @throws IOException passed up from TcpTransportFactory.
     * @throws URISyntaxException passed up from TcpTransportFactory.
     */
    public SslTransportServer(SslTransportFactory transportFactory, URI location, SSLServerSocketFactory serverSocketFactory) throws IOException, URISyntaxException {
        super(transportFactory, location, serverSocketFactory);
    }

    /**
     * Sets whether client authentication should be required
     * Must be called before {@link #bind()}
     * Note: Calling this method clears the wantClientAuth flag
     * in the underlying implementation.
     */
    public void setNeedClientAuth(boolean needAuth) {
        this.needClientAuth = needAuth;
    }

    /**
     * Returns whether client authentication should be required.
     */
    public boolean getNeedClientAuth() {
        return this.needClientAuth;
    }

    /**
     * Returns whether client authentication should be requested.
     */
    public boolean getWantClientAuth() {
        return this.wantClientAuth;
    }

    /**
     * Sets whether client authentication should be requested.
     * Must be called before {@link #bind()}
     * Note: Calling this method clears the needClientAuth flag
     * in the underlying implementation.
     */
    public void setWantClientAuth(boolean wantAuth) {
        this.wantClientAuth = wantAuth;
    }

    /**
     * Binds this socket to the previously specified URI.
     *
     * Overridden to allow for proper handling of needClientAuth.
     *
     * @throws IOException passed up from TcpTransportServer.
     */
    public void bind() throws IOException {
        super.bind();
        if (needClientAuth) {
            ((SSLServerSocket)this.serverSocket).setNeedClientAuth(true);
        } else if (wantClientAuth) {
            ((SSLServerSocket)this.serverSocket).setWantClientAuth(true);
        }
    }

    /**
     * Used to create Transports for this server.
     *
     * Overridden to allow the use of SslTransports (instead of TcpTransports).
     *
     * @param socket The incoming socket that will be wrapped into the new Transport.
     * @param format The WireFormat being used.
     * @return The newly return (SSL) Transport.
     * @throws IOException
     */
    protected Transport createTransport(Socket socket, WireFormat format) throws IOException {
        return new SslTransport(format, (SSLSocket)socket);
    }

    @Override
    public boolean isSslServer() {
        return true;
    }

}