001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.net.ftp;
019
020import java.io.IOException;
021import java.net.InetAddress;
022import java.net.ServerSocket;
023
024import javax.net.ServerSocketFactory;
025import javax.net.ssl.SSLContext;
026import javax.net.ssl.SSLServerSocket;
027
028/**
029 * Server socket factory for FTPS connections.
030 * @since 2.2
031 */
032public class FTPSServerSocketFactory extends ServerSocketFactory {
033
034    /** Factory for secure socket factories */
035    private final SSLContext context;
036
037    public FTPSServerSocketFactory(SSLContext context) {
038        this.context = context;
039    }
040
041    // Override the default superclass method
042    @Override
043    public ServerSocket createServerSocket() throws IOException {
044        return init(this.context.getServerSocketFactory().createServerSocket());
045    }
046
047    @Override
048    public ServerSocket createServerSocket(int port) throws IOException {
049        return init(this.context.getServerSocketFactory().createServerSocket(port));
050    }
051
052    @Override
053    public ServerSocket createServerSocket(int port, int backlog) throws IOException {
054        return init(this.context.getServerSocketFactory().createServerSocket(port, backlog));
055    }
056
057    @Override
058    public ServerSocket createServerSocket(int port, int backlog, InetAddress ifAddress) throws IOException {
059        return init(this.context.getServerSocketFactory().createServerSocket(port, backlog, ifAddress));
060    }
061
062    /**
063     * Sets the socket so newly accepted connections will use SSL client mode.
064     *
065     * @param socket the SSLServerSocket to initialise
066     * @return the socket
067     * @throws ClassCastException if socket is not an instance of SSLServerSocket
068     */
069    public ServerSocket init(ServerSocket socket) {
070        ((SSLServerSocket) socket).setUseClientMode(true);
071        return socket;
072    }
073}
074