com.stgmastek.core.comm.security.PasswordEncryptionService.java Source code

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Here is the source code for com.stgmastek.core.comm.security.PasswordEncryptionService.java

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/*
 * Copyright (c) 2014 Mastek Ltd. All rights reserved.
 * 
 * This file is part of JBEAM. JBEAM 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.
 *
 * JBEAM 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 the specific language governing permissions and 
 * limitations.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with JBEAM. If not, see <http://www.gnu.org/licenses/>.
 */
package com.stgmastek.core.comm.security;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import org.bouncycastle.util.encoders.Base64;

import com.stg.crypto.CryptoHelper;
import com.stgmastek.core.comm.exception.CommException;
import com.stgmastek.core.comm.util.CommConstants;

/**
 * The class is used for encryption of the password Implements the singleton
 * pattern The encryption methoddology is the Standard Hashing Algorithm that
 * Sun JAVA provides
 * 
 * @author grahesh.shanbhag
 */
public final class PasswordEncryptionService {

    /** Private static instance */
    private static PasswordEncryptionService instance = new PasswordEncryptionService();

    /** Private default constructor to avoid any initialization from the outside */
    private PasswordEncryptionService() {
    }

    /**
     * Method to encrypt the password. It uses the algorithm provided in the
     * Constants file to encrypt the password
     * 
     * @see CommConstants
     * 
     * @param password
     *        The password to be encrypted
     * @param encodingType 
     *         The encoding type of the password supplied. 
     *         Usually it is supplied as plain text with encoding type as 'UTF-8'
     * @return the encrypted value as string
     * @throws Exception
     *         Any exception thrown during the encryption methodology
     */
    public synchronized String encrypt(String password, String encodingType) throws CommException {
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance(CommConstants.PASSWORD_ENCRYPTY_ALGO);
        } catch (NoSuchAlgorithmException e) {
            throw new CommException(e);
        }

        try {
            md.update(password.getBytes(encodingType));
        } catch (UnsupportedEncodingException e) {
            throw new CommException(e);
        }

        byte raw[] = md.digest();
        String hash = CryptoHelper.toString(Base64.encode(raw));
        return hash;
    }

    /**
     * Public static method to return the singleton instance
     * 
     * @return the singleton instance of the PasswordEncryptionService
     */
    public static PasswordEncryptionService getInstance() {
        return instance;
    }
}

/*
* Revision Log
* -------------------------------
* $Log:: /Product_Base/Projects/Batch/Code/Java/CoreComm/src/com/stgmastek/core/comm/security/PasswordEncryptionService.java                                                         $
 * 
 * 4     3/05/10 11:57a Kedarr
 * Removed the sun misc Base64 encoder and instead made use of CryptoHelper and bouncy castle provider for base64 encoding.
 * 
 * 3     12/30/09 12:07p Mandar.vaidya
 * 
 * 2     12/17/09 11:55a Grahesh
 * Initial Version
*
*
*/