package org.owasp.webgoat.lessons;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;

import org.apache.ecs.Element;
import org.apache.ecs.ElementContainer;
import org.apache.ecs.HtmlColor;
import org.apache.ecs.StringElement;
import org.apache.ecs.html.IMG;
import org.apache.ecs.html.Input;
import org.apache.ecs.html.PRE;
import org.apache.ecs.html.TD;
import org.apache.ecs.html.TR;
import org.apache.ecs.html.Table;
import org.owasp.webgoat.session.ECSFactory;
import org.owasp.webgoat.session.WebSession;

/*******************************************************************************
 * 
 * 
 * This file is part of WebGoat, an Open Web Application Security Project
 * utility. For details, please see http://www.owasp.org/
 * 
 * Copyright (c) 2002 - 2007 Bruce Mayhew
 * 
 * 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.
 * 
 * This program 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.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA.
 * 
 * Getting Source ==============
 * 
 * Source for this application is maintained at code.google.com, a repository
 * for free software projects.
 * 
 * For details, please see http://code.google.com/p/webgoat/
 * 
 * @author     Sherif Koussa <a href="http://www.macadamian.com">Macadamian Technologies</a>
 * @created    October 28, 2006
 */

public class LogSpoofing extends LessonAdapter
{

    private static final String USERNAME = "username";

    private static final String PASSWORD = "password";

    private final static IMG MAC_LOGO = new IMG("images/logos/macadamian.gif").setAlt(
    "Macadamian Technologies").setBorder(0).setHspace(0).setVspace(0);

    protected Element createContent(WebSession s)
    {

	ElementContainer ec = null;
	String inputUsername = null;
	try
	{

	    Table t = new Table(0).setCellSpacing(0).setCellPadding(0)
		    .setBorder(0);
	    TR row1 = new TR();
	    TR row2 = new TR();
	    TR row3 = new TR();

	    row1.addElement(new TD(new StringElement("Username: ")));
	    Input username = new Input(Input.TEXT, USERNAME, "");
	    row1.addElement(new TD(username));

	    row2.addElement(new TD(new StringElement("Password: ")));
	    Input password = new Input(Input.PASSWORD, PASSWORD, "");
	    row2.addElement(new TD(password));

	    Element b = ECSFactory.makeButton("Login");
	    row3.addElement(new TD(new StringElement("&nbsp; ")));
	    row3.addElement(new TD(b)).setAlign("right");

	    t.addElement(row1);
	    t.addElement(row2);
	    t.addElement(row3);

	    ec = new ElementContainer();
	    ec.addElement(t);

	    inputUsername = new String(s.getParser().getRawParameter(USERNAME,
		    ""));
	    if (inputUsername.length() != 0)
	    {
		inputUsername = URLDecoder.decode(inputUsername, "UTF-8");
	    }

	    ec.addElement(new PRE(" "));

	    Table t2 = new Table(0).setCellSpacing(0).setCellPadding(0)
		    .setBorder(0);
	    TR row4 = new TR();
	    row4.addElement(
		    new TD(new PRE("Login failed for username: "
			    + inputUsername))).setBgColor(HtmlColor.GRAY);

	    t2.addElement(row4);

	    ec.addElement(t2);

	    if (inputUsername.length() != 0
		    && inputUsername.toUpperCase().indexOf(
			    System.getProperty("line.separator")
				    + "LOGIN SUCCEEDED FOR USERNAME:") >= 0)
	    {
		makeSuccess(s);
	    }
	}
	catch (UnsupportedEncodingException e)
	{
	    s.setMessage("Error generating " + this.getClass().getName());
	    e.printStackTrace();
	}
	return ec;
    }

    private final static Integer DEFAULT_RANKING = new Integer(72);


    protected Integer getDefaultRanking()
    {
	return DEFAULT_RANKING;
    }


    @Override
    protected List<String> getHints(WebSession s)
    {
	List<String> hints = new ArrayList<String>();
	hints.add("Try to fool the humane eye by using new lines.");
	hints.add("Use CR (%0d) and LF (%0a) for a new line.");
	hints.add("Try: Smith%0d%0aLogin Succeeded for username: admin");
	hints
		.add("Try: Smith%0d%0aLogin Succeeded for username: admin&lt;script&gt;alert(document.cookie)&lt;/script&gt;");

	return hints;
    }


    @Override
    public String getTitle()
    {
	return "Log Spoofing";
    }


    @Override
    protected Category getDefaultCategory()
    {
	return Category.INJECTION;
    }


    public Element getCredits()
    {
	return super.getCustomCredits("Created by Sherif Koussa ", MAC_LOGO);
    }
}