001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.security.pwd;
016    
017    import com.liferay.portal.PwdEncryptorException;
018    import com.liferay.portal.kernel.util.Validator;
019    
020    /**
021     * @author Michael C. Han
022     */
023    public abstract class BasePasswordEncryptor implements PasswordEncryptor {
024    
025            @Override
026            public String encrypt(
027                            String algorithm, String plainTextPassword,
028                            String encryptedPassword)
029                    throws PwdEncryptorException {
030    
031                    if (Validator.isNull(plainTextPassword)) {
032                            throw new PwdEncryptorException("Unable to encrypt blank password");
033                    }
034    
035                    return doEncrypt(algorithm, plainTextPassword, encryptedPassword);
036            }
037    
038            protected abstract String doEncrypt(
039                            String algorithm, String plainTextPassword,
040                            String encryptedPassword)
041                    throws PwdEncryptorException;
042    
043    }