CipherSocket.java Source code

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Here is the source code for CipherSocket.java

Source

/*
 * 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;
    }
}