Solved: Java Encryption using Triple DES Algo..

look
https://www.experts-exchange.com/jsp/qShow.jsp?ta=java&qid=10232522

Here is an implementation of this algorithm:

// Des3Cipher - the triple-DES encryption method
//
// Copyright (C) 1996 by Jef Poskanzer <jef@acme.com>. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// Visit the ACME Labs Java page for up-to-date versions of this and other
// fine Java utilities: http://www.acme.com/java/

package Acme.Crypto;

import java.io.*;

/// The triple-DES encryption method.
// <P>
// This is a fairly standard way of increasing the security of DES.
// You run each block through DES three times, first encrypting with
// key A, then decrypting with key B, then encrypting again with key A
// again.
// <P>
// <A HREF="/resources/classes/Acme/Crypto/Des3Cipher.java">Fetch the software.</A><BR>
// <A HREF="/resources/classes/Acme.tar.Z">Fetch the entire Acme package.</A>
// <P>
// @see DesCipher
// @see EncryptedOutputStream
// @see EncryptedInputStream

public class Des3Cipher extends BlockCipher
{

/// Constructor, string key.
public Des3Cipher( String keyStr )
      {
      super( 16, 8 );
      setKey( keyStr );
      }

/// Constructor, byte-array key.
public Des3Cipher( byte[] key )
      {
      super( 16, 8 );
      setKey( key );
      }

// Key routines.

private byte[] keyA = new byte[8];
private byte[] keyB = new byte[8];

private DesCipher desA;
private DesCipher desB;

/// Set the key.
public void setKey( byte[] key )
      {
      System.arraycopy( key, 0, keyA, 0, 8 );
      System.arraycopy( key, 8, keyB, 0, 8 );
      desA = new DesCipher( keyA );
      desB = new DesCipher( keyB );
      }

// Block encryption routines.

byte[] temp1 = new byte[8];
byte[] temp2 = new byte[8];

/// Encrypt a block of eight bytes.
public void encrypt( byte[] clearText, int clearOff, byte[] cipherText, int cipherOff )
      {
      desA.encrypt( clearText, clearOff, temp1, 0 );
      desB.decrypt( temp1, 0, temp2, 0 );
      desA.encrypt( temp2, 0, cipherText, cipherOff );
      }

/// Decrypt a block of eight bytes.
public void decrypt( byte[] cipherText, int cipherOff, byte[] clearText, int clearOff )
      {
      desA.decrypt( cipherText, cipherOff, temp1, 0 );
      desB.encrypt( temp1, 0, temp2, 0 );
      desA.decrypt( temp2, 0, clearText, clearOff );
      }

}

you will need to download the support libraries from

http://www.acme.com/java/

to get it working.

I can post further info if you need it...

Jod

The acme link appears to be currently broken, but you can find the underlying algorithm class here:

http://www.tiap.org/chartmakers/Acme/Crypto/DesCipher.java

This gives you the simple(?) DES algorithm.

mbormann

pls note ::::: name of file is Acme.tar.gz

Jod, if u have time ,why not write this fully end to end and will post points for u, thru my friend's account?

thx