package dubious.sub.goobi.helper.encryption;
/**
* This file is part of the Goobi Application - a Workflow tool for the support of mass digitization.
*
* Visit the websites for more information.
* - http://digiverso.com
* - http://www.intranda.com
*
* Copyright 2011, intranda GmbH, Göttingen
*
*
* 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., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions
* of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to
* link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and
* conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this
* library, you may extend this exception to your version of the library, but you are not obliged to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import org.apache.commons.codec.binary.Base64;
public class DesEncrypter {
Cipher ecipher;
Cipher dcipher;
String pass = "rusDML_Passphrase_for_secure_encryption_2005";
// 8-byte Salt
byte[] salt = { (byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32, (byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03 };
// Iteration count
int iterationCount = 19;
/* =============================================================== */
public DesEncrypter() {
Initialise(this.pass);
}
/* =============================================================== */
public DesEncrypter(String passPhrase) {
Initialise(passPhrase);
}
/* =============================================================== */
private void Initialise(String passPhrase) {
try {
// Create the key
KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), this.salt, this.iterationCount);
SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
this.ecipher = Cipher.getInstance(key.getAlgorithm());
this.dcipher = Cipher.getInstance(key.getAlgorithm());
// Prepare the parameter to the ciphers
AlgorithmParameterSpec paramSpec = new PBEParameterSpec(this.salt, this.iterationCount);
// Create the ciphers
this.ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
this.dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
} catch (InvalidAlgorithmParameterException e) {
} catch (InvalidKeySpecException e) {
} catch (NoSuchPaddingException e) {
} catch (NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
}
}
/* =============================================================== */
public String encrypt(String str) {
if (str == null) {
str = "";
}
try {
// Encode the string into bytes using utf-8
byte[] utf8 = str.getBytes("UTF8");
if (this.ecipher == null) {
Initialise(this.pass);
}
// Encrypt
byte[] enc = this.ecipher.doFinal(utf8);
// Encode bytes to base64 to get a string
return new String(Base64.encodeBase64(enc));
} catch (BadPaddingException e) {
// e.printStackTrace();
} catch (IllegalBlockSizeException e) {
// e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// e.printStackTrace();
}
return null;
}
/* =============================================================== */
public String decrypt(String str) {
try {
// Decode base64 to get bytes
byte[] dec = Base64.decodeBase64(str.getBytes("UTF8"));
// Decrypt
byte[] utf8 = this.dcipher.doFinal(dec);
// Decode using utf-8
return new String(utf8, "UTF8");
} catch (BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
}
return null;
}
}