EncryptorImpl.java

/*
 * ====================
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2008-2009 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of the Common Development
 * and Distribution License("CDDL") (the "License").  You may not use this file
 * except in compliance with the License.
 *
 * You can obtain a copy of the License at
 * http://opensource.org/licenses/cddl1.php
 * See the License for the specific language governing permissions and limitations
 * under the License.
 *
 * When distributing the Covered Code, include this CDDL Header Notice in each file
 * and include the License file at http://opensource.org/licenses/cddl1.php.
 * If applicable, add the following below this CDDL Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * ====================
 */
package org.identityconnectors.common.security.impl;

import java.security.Key;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.identityconnectors.common.security.Encryptor;


public class EncryptorImpl implements Encryptor {

    private static final String ALGORITHM = "AES";
    private static final String FULL_ALGORITHM = "AES/CBC/PKCS5Padding";

    private final static byte [] DEFAULT_KEY_BYTES = {
        (byte) 0x23,(byte) 0x65,(byte) 0x87,(byte) 0x22,
        (byte) 0x59,(byte) 0x78,(byte) 0x54,(byte) 0x43,
        (byte) 0x64,(byte) 0x05,(byte) 0x6A,(byte) 0xBD,
        (byte) 0x34,(byte) 0xA2,(byte) 0x34,(byte) 0x57,
    };

    private final static byte [] DEFAULT_IV_BYTES = {
        (byte) 0x51,(byte) 0x65,(byte) 0x22,(byte) 0x23,
        (byte) 0x64,(byte) 0x05,(byte) 0x6A,(byte) 0xBE,
        (byte) 0x51,(byte) 0x65,(byte) 0x22,(byte) 0x23,
        (byte) 0x64,(byte) 0x05,(byte) 0x6A,(byte) 0xBE,
    };

    private Key key;
    private IvParameterSpec iv;

    public EncryptorImpl(boolean defaultKey) {
        if (defaultKey) {
            key = new SecretKeySpec(DEFAULT_KEY_BYTES, ALGORITHM);
            iv = new IvParameterSpec(DEFAULT_IV_BYTES);
        } else {
            try {
                key = KeyGenerator.getInstance(ALGORITHM).generateKey();
                iv = new IvParameterSpec(DEFAULT_IV_BYTES);
            } catch (RuntimeException e) {
                throw e;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    public byte[] decrypt(byte[] bytes) {
        try {
            Cipher cipher = Cipher.getInstance(FULL_ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, key, iv);
            return cipher.doFinal(bytes);
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public byte[] encrypt(byte[] bytes) {
        try {
            Cipher cipher = Cipher.getInstance(FULL_ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, key, iv);
            return cipher.doFinal(bytes);
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}