Package net.sf.xbus.technical.http

Source Code of net.sf.xbus.technical.http.EasySSLProtocolSocketFactory

/*
* ====================================================================
*
*  Copyright 2002-2004 The Apache Software Foundation
*
*  Licensed 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/

package net.sf.xbus.technical.http;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.UnknownHostException;

import javax.net.SocketFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;

import org.apache.commons.httpclient.ConnectTimeoutException;
import org.apache.commons.httpclient.HttpClientError;
import org.apache.commons.httpclient.params.HttpConnectionParams;
import org.apache.commons.httpclient.protocol.SecureProtocolSocketFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
* <p>
* EasySSLProtocolSocketFactory can be used to creats SSL {@link Socket}s that
* accept self-signed certificates.
* </p>
* <p>
* This socket factory SHOULD NOT be used for productive systems due to security
* reasons, unless it is a concious decision and you are perfectly aware of
* security implications of accepting self-signed certificates
* </p>
*
* <p>
* Example of using custom protocol socket factory for a specific host:
*
* <pre>
* Protocol easyhttps = new Protocol(&quot;https&quot;, new EasySSLProtocolSocketFactory(),
*     443);
*
* HttpClient client = new HttpClient();
* client.getHostConfiguration().setHost(&quot;localhost&quot;, 443, easyhttps);
* // use relative url only
* GetMethod httpget = new GetMethod(&quot;/&quot;);
* client.executeMethod(httpget);
* </pre>
*
* </p>
* <p>
* Example of using custom protocol socket factory per default instead of the
* standard one:
*
* <pre>
* Protocol easyhttps = new Protocol(&quot;https&quot;, new EasySSLProtocolSocketFactory(),
*     443);
* Protocol.registerProtocol(&quot;https&quot;, easyhttps);
*
* HttpClient client = new HttpClient();
* GetMethod httpget = new GetMethod(&quot;https://localhost/&quot;);
* client.executeMethod(httpget);
* </pre>
*
* </p>
*
* @author <a href="mailto:oleg -at- ural.ru">Oleg Kalnichevski</a>
*
* <p>
* DISCLAIMER: HttpClient developers DO NOT actively support this component. The
* component is provided as a reference material, which may be inappropriate for
* use without additional customization.
* </p>
*/

public class EasySSLProtocolSocketFactory implements
    SecureProtocolSocketFactory
{

  /** Log object for this class. */
  private static final Log LOG = LogFactory
      .getLog(EasySSLProtocolSocketFactory.class);

  private SSLContext sslcontext = null;

  /**
   * Constructor for EasySSLProtocolSocketFactory.
   */
  public EasySSLProtocolSocketFactory()
  {
    super();
  }

  private static SSLContext createEasySSLContext()
  {
    try
    {
      SSLContext context = SSLContext.getInstance("SSL");
      context.init(null, new TrustManager[]
      { new EasyX509TrustManager(null) }, null);
      return context;
    }
    catch (Exception e)
    {
      LOG.error(e.getMessage(), e);
      throw new HttpClientError(e.toString());
    }
  }

  private SSLContext getSSLContext()
  {
    if (this.sslcontext == null)
    {
      this.sslcontext = createEasySSLContext();
    }
    return this.sslcontext;
  }

  /**
   * @see SecureProtocolSocketFactory#createSocket(java.lang.String,int,java.net.InetAddress,int)
   */
  public Socket createSocket(String host, int port, InetAddress clientHost,
      int clientPort) throws IOException, UnknownHostException
  {

    return getSSLContext().getSocketFactory().createSocket(host, port,
        clientHost, clientPort);
  }

  /**
   * Attempts to get a new socket connection to the given host within the
   * given time limit.
   * <p>
   * To circumvent the limitations of older JREs that do not support connect
   * timeout a controller thread is executed. The controller thread attempts
   * to create a new socket within the given limit of time. If socket
   * constructor does not return until the timeout expires, the controller
   * terminates and throws an {@link ConnectTimeoutException}
   * </p>
   *
   * @param host
   *            the host name/IP
   * @param port
   *            the port on the host
   * @param clientHost
   *            the local host name/IP to bind the socket to
   * @param clientPort
   *            the port on the local machine
   * @param params
   *            {@link HttpConnectionParams Http connection parameters}
   *
   * @return Socket a new socket
   *
   * @throws IOException
   *             if an I/O error occurs while creating the socket
   * @throws UnknownHostException
   *             if the IP address of the host cannot be determined
   */
  public Socket createSocket(final String host, final int port,
      final InetAddress localAddress, final int localPort,
      final HttpConnectionParams params) throws IOException,
      UnknownHostException, ConnectTimeoutException
  {
    if (params == null)
    {
      throw new IllegalArgumentException("Parameters may not be null");
    }
    int timeout = params.getConnectionTimeout();
    SocketFactory socketfactory = getSSLContext().getSocketFactory();
    if (timeout == 0)
    {
      return socketfactory.createSocket(host, port, localAddress,
          localPort);
    }
    else
    {
      Socket socket = socketfactory.createSocket();
      SocketAddress localaddr = new InetSocketAddress(localAddress,
          localPort);
      SocketAddress remoteaddr = new InetSocketAddress(host, port);
      socket.bind(localaddr);
      socket.connect(remoteaddr, timeout);
      return socket;
    }
  }

  /**
   * @see SecureProtocolSocketFactory#createSocket(java.lang.String,int)
   */
  public Socket createSocket(String host, int port) throws IOException,
      UnknownHostException
  {
    return getSSLContext().getSocketFactory().createSocket(host, port);
  }

  /**
   * @see SecureProtocolSocketFactory#createSocket(java.net.Socket,java.lang.String,int,boolean)
   */
  public Socket createSocket(Socket socket, String host, int port,
      boolean autoClose) throws IOException, UnknownHostException
  {
    return getSSLContext().getSocketFactory().createSocket(socket, host,
        port, autoClose);
  }

  public boolean equals(Object obj)
  {
    return ((obj != null) && obj.getClass().equals(
        EasySSLProtocolSocketFactory.class));
  }

  public int hashCode()
  {
    return EasySSLProtocolSocketFactory.class.hashCode();
  }

}
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