WebGoat/main/project/JavaSource/org/owasp/webgoat/lessons/XPATHInjection.java

/**
 * 
 */

package org.owasp.webgoat.lessons;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.io.IOException;
import java.io.FileInputStream;
import org.xml.sax.InputSource;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathExpressionException;
import org.apache.ecs.Element;
import org.apache.ecs.ElementContainer;
import org.apache.ecs.StringElement;
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.TR;
import org.apache.ecs.html.TH;
import org.apache.ecs.html.Table;
import org.apache.ecs.html.H1;
import org.apache.ecs.html.BR;
import org.apache.ecs.html.B;
import org.apache.ecs.html.PRE;
import org.apache.ecs.HtmlColor;
import org.owasp.webgoat.session.WebSession;
import org.owasp.webgoat.session.ECSFactory;


/***************************************************************************************************
 * 
 * 
 * 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 November 28, 2006
 */

public class XPATHInjection extends LessonAdapter
{

	private final static Integer DEFAULT_RANKING = new Integer(74);

	private final static String USERNAME = "Username";

	private final static 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)
	{

		NodeList nodes = null;
		ElementContainer ec = new ElementContainer();

		try
		{
			ec.addElement(new BR().addElement(new H1().addElement("Welcome to WebGoat employee intranet")));
			ec.addElement(new BR());
			Table t1 = new Table().setCellSpacing(0).setCellPadding(0).setBorder(0).setWidth("90%").setAlign("center");

			TR tr = new TR();
			tr.addElement(new TH().addElement("Please confirm your username and password before viewing your profile.")
					.setColSpan(2).setAlign("left"));
			t1.addElement(tr);

			tr = new TR();
			tr.addElement(new TD().addElement("*Required Fields").setWidth("30%").setColSpan(2).setAlign("left"));
			t1.addElement(tr);

			tr = new TR();
			tr.addElement(new TD().addElement("&nbsp").setWidth("30%").setColSpan(2).setAlign("left"));
			t1.addElement(tr);

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

			Input input1 = new Input(Input.TEXT, USERNAME, "");
			tr.addElement(new TD(input1));
			t1.addElement(tr);

			tr = new TR();
			tr.addElement(new TD(new B(new StringElement("*Password: "))));

			Input input2 = new Input(Input.PASSWORD, PASSWORD, "");
			tr.addElement(new TD(input2));
			t1.addElement(tr);

			Element b = ECSFactory.makeButton("Submit");
			t1.addElement(new TR(new TD(b)));
			ec.addElement(t1);

			String username = s.getParser().getRawParameter(USERNAME, "");
			if (username == null || username.length() == 0)
			{
				ec.addElement(new P().addElement(new StringElement("Username is a required field")));
				return ec;
			}

			String password = s.getParser().getRawParameter(PASSWORD, "");
			if (password == null || password.length() == 0)
			{
				ec.addElement(new P().addElement(new StringElement("Password is a required field")));
				return ec;
			}

			String dir = s.getContext().getRealPath("/lessons/XPATHInjection/EmployeesData.xml");
			File d = new File(dir);
			XPathFactory factory = XPathFactory.newInstance();
			XPath xPath = factory.newXPath();
			InputSource inputSource = new InputSource(new FileInputStream(d));
			String expression = "/employees/employee[loginID/text()='" + username + "' and passwd/text()='" + password
					+ "']";
			nodes = (NodeList) xPath.evaluate(expression, inputSource, XPathConstants.NODESET);
			int nodesLength = nodes.getLength();

			Table t2 = null;
			if (nodesLength > 0)
			{
				t2 = new Table().setCellSpacing(0).setCellPadding(0).setBorder(1).setWidth("90%").setAlign("center");
				tr = new TR();
				tr.setBgColor(HtmlColor.GRAY);
				tr.addElement(new TD().addElement("Username"));
				tr.addElement(new TD().addElement("Account No."));
				tr.addElement(new TD().addElement("Salary"));
				t2.addElement(tr);
			}

			for (int i = 0; i < nodesLength; i++)
			{
				Node node = nodes.item(i);
				String[] arrTokens = node.getTextContent().split("[\\t\\s\\n]+");

				tr = new TR();
				tr.addElement(new TD().addElement(arrTokens[1]));
				tr.addElement(new TD().addElement(arrTokens[2]));
				tr.addElement(new TD().addElement(arrTokens[4]));
				t2.addElement(tr);

			}
			if (nodes.getLength() > 1)
			{
				makeSuccess(s);
			}
			if (t2 != null)
			{
				ec.addElement(new PRE());
				ec.addElement(t2);
			}

		} catch (IOException e)
		{
			s.setMessage("Error generating " + this.getClass().getName());
			e.printStackTrace();
		} catch (IllegalArgumentException e)
		{
			s.setMessage("Error generating " + this.getClass().getName());
			e.printStackTrace();
		} catch (XPathExpressionException e)
		{
			s.setMessage("Error generating " + this.getClass().getName());
			e.printStackTrace();
		}
		return ec;
	}

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

	protected Category getDefaultCategory()
	{

		return Category.INJECTION;
	}

	protected boolean getDefaultHidden()
	{
		// TODO Auto-generated method stub
		return false;
	}

	protected Integer getDefaultRanking()
	{

		return DEFAULT_RANKING;
	}

	protected List<String> getHints(WebSession s)
	{
		// TODO Auto-generated method stub
		List<String> hints = new ArrayList<String>();
		hints.add("Remember that the data is stored in XML format.");
		hints.add("The system is using XPath to query.");
		hints.add("XPath is almost the same thing as SQL, the same hacking techniques apply too.");
		hints.add("Try username: Smith' or 1=1 or 'a'='a and a password: anything ");
		return hints;
	}

	public String getTitle()
	{

		return "XPATH Injection";
	}

}