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Cipher Socket
/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.SecretKey;
/**
*
* @author Scott.Stark@jboss.org
*/
public class CipherSocket extends Socket
{
private Cipher cipher;
private Socket delegate;
String algorithm;
SecretKey key;
/** Creates a new instance of CipherSocket */
public CipherSocket(String host, int port, String algorithm, SecretKey key)
throws IOException
{
super(host, port);
this.algorithm = algorithm;
this.key = key;
}
public CipherSocket(Socket delegate, String algorithm, SecretKey key)
throws IOException
{
this.delegate = delegate;
this.algorithm = algorithm;
this.key = key;
}
public InputStream getInputStream() throws IOException
{
InputStream is = delegate == null ? super.getInputStream() : delegate.getInputStream();
Cipher cipher = null;
try
{
cipher = Cipher.getInstance(algorithm);
int size = cipher.getBlockSize();
byte[] tmp = new byte[size];
Arrays.fill(tmp, (byte)15);
IvParameterSpec iv = new IvParameterSpec(tmp);
cipher.init(Cipher.DECRYPT_MODE, key, iv);
}
catch(Exception e)
{
e.printStackTrace();
throw new IOException("Failed to init cipher: "+e.getMessage());
}
CipherInputStream cis = new CipherInputStream(is, cipher);
return cis;
}
public OutputStream getOutputStream() throws IOException
{
OutputStream os = delegate == null ? super.getOutputStream() : delegate.getOutputStream();
Cipher cipher = null;
try
{
cipher = Cipher.getInstance(algorithm);
int size = cipher.getBlockSize();
byte[] tmp = new byte[size];
Arrays.fill(tmp, (byte)15);
IvParameterSpec iv = new IvParameterSpec(tmp);
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
}
catch(Exception e)
{
throw new IOException("Failed to init cipher: "+e.getMessage());
}
CipherOutputStream cos = new CipherOutputStream(os, cipher);
return cos;
}
}
