package org.owasp.webgoat.lessons;

import java.util.ArrayList;
import java.util.List;
import org.apache.ecs.Element;
import org.apache.ecs.ElementContainer;
import org.apache.ecs.StringElement;
import org.apache.ecs.html.A;
import org.apache.ecs.html.B;
import org.apache.ecs.html.Comment;
import org.apache.ecs.html.H1;
import org.apache.ecs.html.IMG;
import org.apache.ecs.html.Input;
import org.apache.ecs.html.P;
import org.apache.ecs.html.TD;
import org.apache.ecs.html.TH;
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 Jeff Williams <a href="http://www.aspectsecurity.com">Aspect Security</a>
 * @created October 28, 2003
 */
public class HtmlClues extends LessonAdapter
{
	public final static A ASPECT_LOGO = new A().setHref("http://www.aspectsecurity.com")
			.addElement(
						new IMG("images/logos/aspect.jpg").setAlt("Aspect Security").setBorder(0).setHspace(0)
								.setVspace(0));

	/**
	 * Description of the Field
	 */
	protected final static String PASSWORD = "Password";

	/**
	 * Description of the Field
	 */
	protected final static String USERNAME = "Username";

	/**
	 * Description of the Method
	 * 
	 * @param s
	 *            Description of the Parameter
	 * @return Description of the Return Value
	 */
	private boolean backdoor(WebSession s)
	{
		String username = s.getParser().getRawParameter(USERNAME, "");
		String password = s.getParser().getRawParameter(PASSWORD, "");

		// <START_OMIT_SOURCE>
		return (username.equals("admin") && password.equals("adminpw"));
		// <END_OMIT_SOURCE>
	}

	/**
	 * Description of the Method
	 * 
	 * @param s
	 *            Description of the Parameter
	 * @return Description of the Return Value
	 */
	protected Element createContent(WebSession s)
	{
		ElementContainer ec = new ElementContainer();

		try
		{
			// <START_OMIT_SOURCE>
			ec.addElement(new Comment("FIXME admin:adminpw"));
			// <END_OMIT_SOURCE>
			ec.addElement(new Comment("Use Admin to regenerate database"));

			if (backdoor(s))
			{
				makeSuccess(s);

				s.setMessage("BINGO -- admin authenticated");
				ec.addElement(makeUser(s, "admin", "CREDENTIALS"));
			}
			else
			{
				ec.addElement(makeLogin(s));
			}
		} catch (Exception e)
		{
			s.setMessage("Error generating " + this.getClass().getName());
		}

		return (ec);
	}

	/**
	 * Description of the Method
	 * 
	 * @param s
	 *            Description of the Parameter
	 * @param user
	 *            Description of the Parameter
	 * @param method
	 *            Description of the Parameter
	 * @return Description of the Return Value
	 * @exception Exception
	 *                Description of the Exception
	 */
	protected Element makeUser(WebSession s, String user, String method) throws Exception
	{
		ElementContainer ec = new ElementContainer();
		ec.addElement(new P().addElement("Welcome, " + user));
		ec.addElement(new P().addElement("You have been authenticated with " + method));

		return (ec);
	}

	protected Element makeLogin(WebSession s)
	{
		ElementContainer ec = new ElementContainer();

		ec.addElement(new H1().addElement("Sign In "));
		Table t = new Table().setCellSpacing(0).setCellPadding(2).setBorder(0).setWidth("90%").setAlign("center");

		if (s.isColor())
		{
			t.setBorder(1);
		}

		TR tr = new TR();
		tr.addElement(new TH()
				.addElement("Please sign in to your account.  See the OWASP admin if you do not have an account.")
				.setColSpan(2).setAlign("left"));
		t.addElement(tr);

		tr = new TR();
		tr.addElement(new TD().addElement("*Required Fields").setWidth("30%"));
		t.addElement(tr);

		tr = new TR();
		tr.addElement(new TD().addElement("&nbsp;").setColSpan(2));
		t.addElement(tr);

		TR row1 = new TR();
		TR row2 = new TR();
		row1.addElement(new TD(new B(new StringElement("*User Name: "))));
		row2.addElement(new TD(new B(new StringElement("*Password: "))));

		Input input1 = new Input(Input.TEXT, USERNAME, "");
		Input input2 = new Input(Input.PASSWORD, PASSWORD, "");
		row1.addElement(new TD(input1));
		row2.addElement(new TD(input2));
		t.addElement(row1);
		t.addElement(row2);

		Element b = ECSFactory.makeButton("Login");
		t.addElement(new TR(new TD(b)));
		ec.addElement(t);

		return (ec);
	}

	/**
	 * Gets the hints attribute of the CluesScreen object
	 * 
	 * @return The hints value
	 */
	protected List<String> getHints(WebSession s)
	{
		List<String> hints = new ArrayList<String>();
		hints.add("You can view the HTML source by selecting 'view source' in the browser menu.");
		hints.add("There are lots of clues in the HTML");
		hints.add("Search for the word HIDDEN, look at URLs, look for comments.");

		return hints;
	}

	/**
	 * Gets the instructions attribute of the HtmlClues object
	 * 
	 * @return The instructions value
	 */
	public String getInstructions(WebSession s)
	{
		String instructions = "Below is an example of a forms based authentication form.  Look for clues to help you log in.";

		return (instructions);
	}

	private final static Integer DEFAULT_RANKING = new Integer(30);

	protected Integer getDefaultRanking()
	{
		return DEFAULT_RANKING;
	}

	/**
	 * Gets the category attribute of the FailOpenAuthentication object
	 * 
	 * @return The category value
	 */
	protected Category getDefaultCategory()
	{
		return Category.CODE_QUALITY;
	}

	/**
	 * Gets the title attribute of the CluesScreen object
	 * 
	 * @return The title value
	 */
	public String getTitle()
	{
		return ("Discover Clues in the HTML");
	}

	public Element getCredits()
	{
		return super.getCustomCredits("", ASPECT_LOGO);
	}
}