/*
    *  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 static org.junit.Assert.*;
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.security.GeneralSecurityException;
  import java.security.KeyStore;
  import java.security.Security;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import javax.net.ssl.KeyManagerFactory;
  import javax.net.ssl.SSLContext;
  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.transport.socket.nio.NioSocketConnector;
  import org.apache.mina.util.AvailablePortFinder;
  import org.junit.Ignore;
  import org.junit.Test;
  
  /**
   * Test an SSL session where the connection cannot be established with the server due to 
   * incompatible protocols (Test for DIRMINA-937)
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class SslDIRMINA937Test {
      /** A static port used for his test, chosen to avoid collisions */
      private static final int port = AvailablePortFinder.getNextAvailable(5555);
  
      /** 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'");
                  session.write("data");
              }
          }
      }
  
      /**
       * 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
          SSLContext context = createSSLContext("TLSv1");
          SslFilter sslFilter = new SslFilter(context);
          sslFilter.setEnabledProtocols(new String[] { "TLSv1" });
          //sslFilter.setEnabledCipherSuites(getServerCipherSuites(context.getDefaultSSLParameters().getCipherSuites()));
          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(final CountDownLatch counter) throws Exception {
         NioSocketConnector connector = new NioSocketConnector();
         
         DefaultIoFilterChainBuilder filters = connector.getFilterChain();
         SslFilter sslFilter = new SslFilter(createSSLContext("TLSv1.1"));
         sslFilter.setEnabledProtocols(new String[] { "TLSv1.1" });
         sslFilter.setUseClientMode(true);
         //sslFilter.setEnabledCipherSuites(getClientCipherSuites());
         filters.addLast("sslFilter", sslFilter);
         connector.setHandler(new IoHandlerAdapter() {
             @Override
             public void sessionCreated(IoSession session) throws Exception {
                 session.setAttribute(SslFilter.USE_NOTIFICATION, Boolean.TRUE);
             }
 
             @Override
             public void messageReceived(IoSession session, Object message) throws Exception {
                 if (message == SslFilter.SESSION_SECURED) {
                     counter.countDown();
                 }
             }
 
 
         });
         connector.connect(new InetSocketAddress("localhost", port));
     }
 
     private static SSLContext createSSLContext(String protocol) throws IOException, GeneralSecurityException {
         char[] passphrase = "password".toCharArray();
 
         SSLContext ctx = SSLContext.getInstance(protocol);
         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(SslDIRMINA937Test.class.getResourceAsStream("keystore.sslTest"), passphrase);
         ts.load(SslDIRMINA937Test.class.getResourceAsStream("truststore.sslTest"), passphrase);
 
         kmf.init(ks, passphrase);
         tmf.init(ts);
         ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
 
         return ctx;
     }
 
     /**
      * Test is ignore as it will cause the build to fail
      */
     @Test
     @Ignore("This test is not yet fully functionnal, it servers as the basis for validating DIRMINA-937")
     public void testDIRMINA937() throws Exception {
         startServer();
 
         final CountDownLatch counter = new CountDownLatch(1);
         startClient(counter);
         assertTrue(counter.await(10, TimeUnit.SECONDS));
     }
 }