org.businessmanager.util.PasswordGenerator.java Source code

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Here is the source code for org.businessmanager.util.PasswordGenerator.java

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/*******************************************************************************
 * Copyright 2012 Christian Ternes and Thorsten Volland
 * 
 * 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.businessmanager.util;

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.authentication.encoding.Md5PasswordEncoder;
import org.springframework.security.authentication.encoding.PasswordEncoder;

public final class PasswordGenerator {

    private static final Logger LOGGER = LoggerFactory.getLogger(PasswordGenerator.class);
    private static final PasswordEncoder ENCODER = new Md5PasswordEncoder();
    private static SecureRandom secureRandom;

    private PasswordGenerator() {
    }

    public static String encodePassword(String pwd, Long salt) {
        return ENCODER.encodePassword(pwd, salt);
    }

    public static Long generateSalt() {
        if (secureRandom == null) {
            try {
                secureRandom = SecureRandom.getInstance("SHA1PRNG");
            } catch (NoSuchAlgorithmException e) {
                LOGGER.error("Could not initialize SecureRandom because the algorithm could not be found.");
            }
        }
        return Long.valueOf(secureRandom.nextLong());
    }
}