org.jdal.auth.AuthHashMD5.java Source code

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Here is the source code for org.jdal.auth.AuthHashMD5.java

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/*
 * Copyright 2008-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jdal.auth;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.bouncycastle.util.encoders.Base64;

/**
 * An AuthStrategy that use HashMD5
 * 
 * @author Jose Luis Martin.
 * @since 1.0
 */
public class AuthHashMD5 implements AuthStrategy {

    /** log */
    private static Log log = LogFactory.getLog(AuthHashMD5.class);

    /**
     * Test if userPassword is a md5 hash of suppliedPassword
     * 
     * @param suppliedPassword password form user
     * @param userPassword password from db
     * @return true if passwords match
     */
    public boolean validate(String suppliedPassword, String userPassword) {
        if (suppliedPassword == null || userPassword == null) {
            return false;
        }

        try {
            String encriptedPassword = crypt(suppliedPassword);

            return userPassword.equals(encriptedPassword);
        } catch (NoSuchAlgorithmException nsae) {
            log.error(nsae);
            return false;
        }
    }

    /**
     * crypt a password 
     * @param suppliedPassword
     * @return crypted password
     * @throws NoSuchAlgorithmException
     */
    public String crypt(String suppliedPassword) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(suppliedPassword.getBytes());
        String encriptedPassword = null;
        try {
            encriptedPassword = new String(Base64.encode(md.digest()), "ASCII");
        } catch (UnsupportedEncodingException e) {
        }
        return encriptedPassword;
    }
}