rtspproxy.filter.authentication.SimpleAuthenticationProvider.java Source code

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Here is the source code for rtspproxy.filter.authentication.SimpleAuthenticationProvider.java

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/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   Copyright (C) 2005 - Matteo Merli - matteo.merli@gmail.com            *
 *                                                                         *
 ***************************************************************************/

/*
 * $Id$
 * 
 * $URL$
 * 
 */

package rtspproxy.filter.authentication;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Observable;
import java.util.Observer;
import java.util.Properties;

import org.apache.commons.configuration.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import rtspproxy.config.StringParameter;
import rtspproxy.filter.authentication.scheme.Credentials;

/**
 * @author Matteo Merli
 */
public class SimpleAuthenticationProvider implements AuthenticationProvider, Observer {

    private static final Logger log = LoggerFactory.getLogger(SimpleAuthenticationProvider.class);

    private final StringParameter usersDbParameter;

    private final Properties usersDb = new Properties();

    public SimpleAuthenticationProvider() {
        usersDbParameter = new StringParameter("filters.authentication.usersFile", // name
                "conf/users.properties", // default value
                true, // mutable
                "");

        usersDbParameter.addObserver(this);
    }

    public void start() throws Exception {
        // Read user database
        try {
            String fileName = usersDbParameter.getValue();
            InputStream is = new FileInputStream(fileName);
            usersDb.load(is);

        } catch (Exception e) {
            log.error("Error reading users DB: " + e.getMessage());
        }
    }

    public void stop() {
        usersDb.clear();
    }

    public String getPassword(String username) {
        return usersDb.getProperty(username);
    }

    public boolean isAuthenticated(Credentials credentials) {
        String storedPassword = usersDb.getProperty(credentials.getUserName());
        if (storedPassword == null)
            // User is not present
            return false;

        if (storedPassword.compareTo(credentials.getPassword()) == 0)
            // Password is ok
            return true;

        // Password is wrong
        return false;
    }

    public void configure(Configuration configuration) {
        usersDbParameter.readConfiguration(configuration);
    }

    public void update(Observable o, Object arg) {
        if (o != usersDbParameter) {
            log.debug("Received notification of wrong object: {}", o);
            return;
        }

        try {
            stop();
            start();
        } catch (Exception e) {
            log.error("Error restarting Authentication provider");
        }
    }
}