it.geosolutions.figis.persistence.dao.util.PwEncoder.java Source code

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Here is the source code for it.geosolutions.figis.persistence.dao.util.PwEncoder.java

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/*
 * ====================================================================
 *
 * Intersection Engine
 *
 * Copyright (C) 2007 - 2011 GeoSolutions S.A.S.
 * http://www.geo-solutions.it
 *
 * GPLv3 + Classpath exception
 *
 * 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.
 *
 * ====================================================================
 *
 * This software consists of voluntary contributions made by developers
 * of GeoSolutions.  For more information on GeoSolutions, please see
 * <http://www.geo-solutions.it/>.
 *
 */
package it.geosolutions.figis.persistence.dao.util;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

/**
 * Class for encoding password
 * @author ETj <etj at geo-solutions.it>
 */
public class PwEncoder {

    // 123456789 123456789 123456789 12
    private static final byte[] KEY = "installation dependant key needed".substring(0, 16).getBytes();

    /**
     * Encoding the password on base64
     * @param msg
     * @return
     */
    public static String encode(String msg) {
        try {
            SecretKeySpec keySpec = new SecretKeySpec(KEY, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.ENCRYPT_MODE, keySpec);

            byte[] input = msg.getBytes();
            byte[] encrypted = cipher.doFinal(input);
            byte[] output = Base64.encodeBase64(encrypted);

            return new String(output);
        } catch (NoSuchAlgorithmException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (NoSuchPaddingException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (IllegalBlockSizeException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (BadPaddingException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (InvalidKeyException ex) {
            throw new RuntimeException("Error while encoding", ex);
        }
    }

    /**
     * Decode the password on base 64
     * @param msg
     * @return
     */
    public static String decode(String msg) {
        try {
            SecretKeySpec keySpec = new SecretKeySpec(KEY, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, keySpec);

            byte[] de64 = Base64.decodeBase64(msg);
            byte[] decrypted = cipher.doFinal(de64);

            return new String(decrypted);
        } catch (NoSuchAlgorithmException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (NoSuchPaddingException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (IllegalBlockSizeException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (BadPaddingException ex) {
            throw new RuntimeException("Error while encoding", ex);
        } catch (InvalidKeyException ex) {
            throw new RuntimeException("Error while encoding", ex);
        }
    }
}