/*
* Copyright (c) 2002-2003 by OpenSymphony
* All rights reserved.
*/
package com.opensymphony.module.random;
/* ====================================================================
* The OpenSymphony Software License, Version 1.1
*
* (this license is derived and fully compatible with the Apache Software
* License - see http://www.apache.org/LICENSE.txt)
*
* Copyright (c) 2001 The OpenSymphony Group. 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.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* OpenSymphony Group (http://www.opensymphony.com/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "OpenSymphony" and "The OpenSymphony Group"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [email protected] .
*
* 5. Products derived from this software may not be called "OpenSymphony"
* or "OSCore", nor may "OpenSymphony" or "OSCore" appear in their
* name, without prior written permission of the OpenSymphony Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*/
import com.opensymphony.module.random.Rijndael_Algorithm;
import java.security.InvalidKeyException;
/**
* DOCUMENT ME!
*
* @author $author$
* @version $Revision: 125 $
*/
public class Rijndael {
//~ Instance fields ////////////////////////////////////////////////////////
private Object sessionKey;
private int blocksize;
private int keysize;
//~ Constructors ///////////////////////////////////////////////////////////
public Rijndael(int keysize, int blocksize) {
if (!((keysize == 128) || (keysize == 192) || (keysize == 256))) {
throw new RuntimeException("Invalid keysize");
}
if (!((blocksize == 128) || (blocksize == 192) || (blocksize == 256))) {
throw new RuntimeException("Invalid blocksize");
}
this.keysize = keysize;
this.blocksize = blocksize;
}
public Rijndael() {
this(128, 128);
}
//~ Methods ////////////////////////////////////////////////////////////////
public int getBlockSize() {
return blocksize;
}
public int getKeySize() {
return keysize;
}
public byte[] decipher(byte[] block) {
return Rijndael_Algorithm.blockDecrypt(block, 0, sessionKey);
}
public byte[] encipher(byte[] block) {
return Rijndael_Algorithm.blockEncrypt(block, 0, sessionKey);
}
public void initialize(byte[] key) {
byte[] nkey = new byte[keysize >> 3];
System.arraycopy(key, 0, nkey, 0, nkey.length);
try {
sessionKey = Rijndael_Algorithm.makeKey(nkey);
} catch (InvalidKeyException e) {
//can't happen?
e.printStackTrace();
}
}
}
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