/**
* $RCSfile: ,v $
* $Revision: $
* $Date: $
*
* Copyright (C) 2004-2011 Jive Software. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.spark.util;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.spark.util.log.Log;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
/**
* Encrypts and Decrypts text based on DESede keys.
*
* @author Derek DeMoro
*/
public class Encryptor {
private static String secretKey = "ugfpV1dMC5jyJtqwVAfTpHkxqJ0+E0ae";
private static Cipher ecipher;
private static Cipher dcipher;
static {
try {
SecretKey key = decodeKey();
ecipher = Cipher.getInstance("DESede");
dcipher = Cipher.getInstance("DESede");
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
}
catch (Exception e) {
Log.error(e);
}
}
public static String encrypt(String string) throws Exception {
byte[] utf8 = string.getBytes("UTF8");
// Encrypt
byte[] enc = ecipher.doFinal(utf8);
return org.jivesoftware.smack.util.StringUtils.encodeBase64(enc);
}
public static String decrypt(String string) {
byte[] dec = StringUtils.decodeBase64(string);
try {
// Decrypt
byte[] utf8 = dcipher.doFinal(dec);
// Decode using utf-8
return new String(utf8, "UTF8");
}
catch (IllegalBlockSizeException e) {
Log.error(e);
}
catch (BadPaddingException e) {
Log.error(e);
}
catch (UnsupportedEncodingException e) {
Log.error(e);
}
return null;
}
private static SecretKey decodeKey() throws Exception {
byte[] bytes = StringUtils.decodeBase64(secretKey);
return new SecretKeySpec(bytes, "DESede");
}
public static void main(String[] args) throws Exception {
String encoded = encrypt("How are you today");
System.out.println(decrypt(encoded));
}
}