/*
    *  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.mina.filter.ssl;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.net.Socket;
  import java.security.GeneralSecurityException;
  import java.security.KeyStore;
  import java.security.Security;
  
  import javax.net.ssl.KeyManagerFactory;
  import javax.net.ssl.SSLContext;
  import javax.net.ssl.SSLSocketFactory;
  import javax.net.ssl.TrustManagerFactory;
  
  import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
  import org.apache.mina.core.service.IoHandlerAdapter;
  import org.apache.mina.core.session.IoSession;
  import org.apache.mina.filter.codec.ProtocolCodecFilter;
  import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
  import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
  import org.apache.mina.util.AvailablePortFinder;
  import org.junit.Test;
  
  /**
   * Test a SSL session where the connection is established and closed twice. It should be
   * processed correctly (Test for DIRMINA-650)
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class SslTest {
      /** A static port used for his test, chosen to avoid collisions */
      private static final int port = AvailablePortFinder.getNextAvailable(5555);
  
      private static Exception clientError = null;
  
      private static InetAddress address;
  
      private static SSLSocketFactory factory;
  
      /** A JVM independant KEY_MANAGER_FACTORY algorithm */
      private static final String KEY_MANAGER_FACTORY_ALGORITHM;
  
      static {
          String algorithm = Security.getProperty("ssl.KeyManagerFactory.algorithm");
          if (algorithm == null) {
              algorithm = KeyManagerFactory.getDefaultAlgorithm();
          }
  
          KEY_MANAGER_FACTORY_ALGORITHM = algorithm;
      }
  
      private static class TestHandler extends IoHandlerAdapter {
          public void messageReceived(IoSession session, Object message) throws Exception {
              String line = (String) message;
  
              if (line.startsWith("hello")) {
                  //System.out.println("Server got: 'hello', waiting for 'send'");
                  Thread.sleep(1500);
              } else if (line.startsWith("send")) {
                  //System.out.println("Server got: 'send', sending 'data'");
                  StringBuilder sb = new StringBuilder();
                  
                  for ( int i = 0; i < 10000; i++) {
                      sb.append('A');
                  }
                      
                  session.write(sb.toString());
                  session.close(true);
              }
          }
      }
  
      /**
       * Starts a Server with the SSL Filter and a simple text line 
       * protocol codec filter
       */
      private static void startServer() throws Exception {
          NioSocketAcceptor acceptor = new NioSocketAcceptor();
 
         acceptor.setReuseAddress(true);
         DefaultIoFilterChainBuilder filters = acceptor.getFilterChain();
 
         // Inject the SSL filter
         SslFilter sslFilter = new SslFilter(createSSLContext());
         filters.addLast("sslFilter", sslFilter);
 
         // Inject the TestLine codec filter
         filters.addLast("text", new ProtocolCodecFilter(new TextLineCodecFactory()));
 
         acceptor.setHandler(new TestHandler());
         acceptor.bind(new InetSocketAddress(port));
     }
 
     /**
      * Starts a client which will connect twice using SSL
      */
     private static void startClient() throws Exception {
         address = InetAddress.getByName("localhost");
 
         SSLContext context = createSSLContext();
         factory = context.getSocketFactory();
 
         connectAndSend();
 
         // This one will throw a SocketTimeoutException if DIRMINA-650 is not fixed
         connectAndSend();
     }
 
     private static void connectAndSend() throws Exception {
         Socket parent = new Socket(address, port);
         Socket socket = factory.createSocket(parent, address.getCanonicalHostName(), port, false);
 
         //System.out.println("Client sending: hello");
         socket.getOutputStream().write("hello                      \n".getBytes());
         socket.getOutputStream().flush();
         socket.setSoTimeout(1000000);
 
         //System.out.println("Client sending: send");
         socket.getOutputStream().write("send\n".getBytes());
         socket.getOutputStream().flush();
 
         BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
         String line = in.readLine();
         //System.out.println("Client got: " + line);
         socket.close();
 
     }
 
     private static SSLContext createSSLContext() throws IOException, GeneralSecurityException {
         char[] passphrase = "password".toCharArray();
 
         SSLContext ctx = SSLContext.getInstance("TLS");
         KeyManagerFactory kmf = KeyManagerFactory.getInstance(KEY_MANAGER_FACTORY_ALGORITHM);
         TrustManagerFactory tmf = TrustManagerFactory.getInstance(KEY_MANAGER_FACTORY_ALGORITHM);
 
         KeyStore ks = KeyStore.getInstance("JKS");
         KeyStore ts = KeyStore.getInstance("JKS");
 
         ks.load(SslTest.class.getResourceAsStream("keystore.sslTest"), passphrase);
         ts.load(SslTest.class.getResourceAsStream("truststore.sslTest"), passphrase);
 
         kmf.init(ks, passphrase);
         tmf.init(ts);
         ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
 
         return ctx;
     }
 
     @Test
     public void testSSL() throws Exception {
         startServer();
 
         Thread t = new Thread() {
             public void run() {
                 try {
                     startClient();
                 } catch (Exception e) {
                     clientError = e;
                 }
             }
         };
         t.start();
         t.join();
         if (clientError != null)
             throw clientError;
     }
 }