SessionManagement2ChangePassword.java

package servlets.module.challenge;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Locale;
import java.util.ResourceBundle;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;
import org.owasp.esapi.ESAPI;
import org.owasp.esapi.Encoder;

import utils.Hash;
import utils.ShepherdLogManager;
import utils.Validate;
import dbProcs.Database;

/**
 * Session Management Challenge Two - Password Reset Servlet
 * Does not return result key
 * <br/><br/>
 * This file is part of the Security Shepherd Project.
 * 
 * The Security Shepherd project 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 3 of the License, or
 * (at your option) any later version.<br/>
 * 
 * The Security Shepherd project 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 General Public License for more details.<br/>
 * 
 * You should have received a copy of the GNU General Public License
 * along with the Security Shepherd project.  If not, see <http://www.gnu.org/licenses/>. 
 * @author Mark Denihan
 *
 */
public class SessionManagement2ChangePassword extends HttpServlet
{
	private static final long serialVersionUID = 1L;
	private static org.apache.log4j.Logger log = Logger.getLogger(SessionManagement2ChangePassword.class);
	private static String levelName = "Session Management Challenge Two (Change Pass)";
	public static String levelHash = "f5ddc0ed2d30e597ebacf5fdd117083674b19bb92ffc3499121b9e6a12c92959";
	/**
	 * A user with the submitted email address is set a new random password, the password is also returned from the database procedure and is forwards through to the HTTP response.
	 * This response is not consumed by the client interface by default, and the user will have to discover it.
	 * @param subEmail Sub schema user email address
	 */
	public void doPost (HttpServletRequest request, HttpServletResponse response) 
	throws ServletException, IOException
	{
		//Setting IpAddress To Log and taking header for original IP if forwarded from proxy
		ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
		HttpSession ses = request.getSession(true);
		
		//Translation Stuff
		Locale locale = new Locale(Validate.validateLanguage(request.getSession()));
		ResourceBundle errors = ResourceBundle.getBundle("i18n.servlets.errors", locale);
		ResourceBundle bundle = ResourceBundle.getBundle("i18n.servlets.challenges.sessionManagement.sessionManagement2", locale);
		
		if(Validate.validateSession(ses))
		{
			ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"), ses.getAttribute("userName").toString());
			log.debug(levelName + " servlet accessed by: " + ses.getAttribute("userName").toString());
			PrintWriter out = response.getWriter();  
			out.print(getServletInfo());
			Encoder encoder = ESAPI.encoder();
			String htmlOutput = new String();
			log.debug(levelName + " Servlet accessed");
			try
			{
				log.debug("Getting Challenge Parameter");
				Object emailObj = request.getParameter("subEmail");
				String subEmail = new String();
				if(emailObj != null)
					subEmail = (String) emailObj;
				log.debug("subEmail = " + subEmail);
				
				log.debug("Getting ApplicationRoot");
				String ApplicationRoot = getServletContext().getRealPath("");
				
				String newPassword = Hash.randomString();
				try
				{
					Connection conn = Database.getChallengeConnection(ApplicationRoot, "BrokenAuthAndSessMangChalTwo");
					log.debug("Checking credentials");
					PreparedStatement callstmt = conn.prepareStatement("UPDATE users SET userPassword = SHA(?) WHERE userAddress = ?");
					callstmt.setString(1, newPassword);
					callstmt.setString(2, subEmail);
					log.debug("Executing resetPassword");
					callstmt.execute();
					log.debug("Statement executed");
					
					log.debug("Committing changes made to database");
					callstmt = conn.prepareStatement("COMMIT");
					callstmt.execute();
					log.debug("Changes committed.");
					
					htmlOutput = encoder.encodeForHTML(newPassword);
					Database.closeConnection(conn);
				}
				catch(SQLException e)
				{
					log.error(levelName + " SQL Error: " + e.toString());
				}
				log.debug("Outputting HTML");
				out.write(bundle.getString("response.changedTo") + " " + htmlOutput);
			}
			catch(Exception e)
			{
				out.write(errors.getString("error.funky"));
				log.fatal(levelName + " - " + e.toString());
			}
		}
		else
		{
			log.error(levelName + " servlet accessed with no session");
		}
	}
}