/*
* This file is part of "The Java Telnet Application".
*
* (c) Matthias L. Jugel, Marcus Mei�ner 1996-2002. All Rights Reserved.
* The file was changed by Radek Polak to work as midlet in MIDP 1.0
*
* Please visit http://javatelnet.org/ for updates and contact.
*
* --LICENSE NOTICE--
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* --LICENSE NOTICE--
*/
package ssh.v1;
/**
* Cipher class is the type for all other ciphers.
*
* @author Marcus Meissner
* @version $Id$
*/
public abstract class Cipher {
public static Cipher getInstance( String algorithm ) {
Class c;
try {
// System.out.println( "--- Cipher needs " + algorithm );
c = Class.forName( "ssh.v1." + algorithm );
return (Cipher) c.newInstance();
}
catch ( Exception e ) {
//System.err.println( "Cipher: " + algorithm + " " + e );
return null;
}
}
/**
* Encrypt source byte array using the instantiated algorithm.
*/
public byte[] encrypt( byte[] src ) {
byte[] dest = new byte[src.length];
encrypt( src, 0, dest, 0, src.length );
return dest;
}
/**
* The actual encryption takes place here.
*/
public abstract void encrypt( byte[] src, int srcOff, byte[] dest, int destOff, int len );
/**
* Decrypt source byte array using the instantiated algorithm.
*/
public byte[] decrypt( byte[] src ) {
byte[] dest = new byte[src.length];
decrypt( src, 0, dest, 0, src.length );
return dest;
}
/**
* The actual decryption takes place here.
*/
public abstract void decrypt( byte[] src, int srcOff, byte[] dest, int destOff, int len );
public abstract void setKey( byte[] key );
public void setKey( String key ) {
setKey( key.getBytes() );
}
}