/**
* This file is part of Waarp Project.
*
* Copyright 2009, Frederic Bregier, and individual contributors by the @author tags. See the
* COPYRIGHT.txt in the distribution for a full listing of individual contributors.
*
* All Waarp Project 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 3 of
* the License, or (at your option) any later version.
*
* Waarp 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 Waarp . If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.waarp.common.crypto;
/**
* This class handles methods to crypt and decrypt messages with DES algorithm (very efficient:
* 40000/s).<br>
* <br>
* Usage:<br>
* <ul>
* <li>Create a Des object: Des key = new Des();</li>
* <li>Create a key:
* <ul>
* <li>Generate: key.generateKey();<br>
* The method key.getSecretKeyInBytes() allow getting the key in Bytes.</li>
* <li>From an external source: key.setSecretKey(arrayOfBytes);</li>
* </ul>
* </li>
* <li>To crypt a String in a Base64 format: String myStringCrypt = key.cryptToString(myString);</li>
* <li>To decrypt one string from Base64 format to the original String: String myStringDecrypt =
* key.decryptStringInString(myStringCrypte);</li>
* </ul>
*
* @author frederic bregier
*
*/
public class Des extends KeyObject {
/**
* This value could be between 32 and 128 due to license limitation.
*/
private final static int KEY_SIZE = 56; // [32..448]
private final static String ALGO = "DES";
private final static String INSTANCE = "DES/ECB/PKCS5Padding";
public final static String EXTENSION = "des";
@Override
public String getAlgorithm() {
return ALGO;
}
@Override
public String getInstance() {
return INSTANCE;
}
@Override
public int getKeySize() {
return KEY_SIZE;
}
@Override
public String getFileExtension() {
return EXTENSION;
}
}