/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.web.security.codec;
import org.gatein.common.util.Base64;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
/**
* Symmetric codec bases on Java Cryptography Library
*
* @author <a href="hoang281283@gmail.com">Minh Hoang TO</a>
* @date 6/15/12
*/
public class JCASymmetricCodec extends AbstractCodec {
private final Cipher encrypter;
private final Cipher decrypter;
JCASymmetricCodec(String transformation, SecretKey key) throws NoSuchAlgorithmException, NoSuchPaddingException,
InvalidKeyException {
this.encrypter = Cipher.getInstance(transformation);
this.decrypter = Cipher.getInstance(transformation);
this.encrypter.init(Cipher.ENCRYPT_MODE, key);
this.decrypter.init(Cipher.DECRYPT_MODE, key);
}
@Override
public String encode(String plainInput) {
try {
byte[] bytes;
synchronized (encrypter) {
bytes = encrypter.doFinal(plainInput.getBytes());
}
return Base64.encodeBytes(bytes);
} catch (Exception ex) {
throw new UndeclaredThrowableException(ex);
}
}
@Override
public String decode(String encodedInput) {
try {
byte[] bytes = Base64.decode(encodedInput);
synchronized (decrypter) {
bytes = decrypter.doFinal(bytes);
}
return new String(bytes);
} catch (Exception ex) {
throw new UndeclaredThrowableException(ex);
}
}
}