package org.owasp.webgoat.lessons;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.Cookie;
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.H1;
import org.apache.ecs.html.IMG;
import org.apache.ecs.html.Input;
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.ParameterNotFoundException;
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 - 20014 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 https://github.com/WebGoat/WebGoat, a repository for free software
* projects.
*
* For details, please see http://webgoat.github.io
*
* @author Rogan Dawes <a href="http://dawes.za.net/rogan">Rogan Dawes</a>
* @created March 30, 2005
*/
public class WeakSessionID 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 SESSIONID = "WEAKID";
/**
* Description of the Field
*/
protected final static String PASSWORD = "Password";
/**
* Description of the Field
*/
protected final static String USERNAME = "Username";
protected static List<String> sessionList = new ArrayList<String>();
protected static long seq = Math.round(Math.random() * 10240) + 10000;
protected static long lastTime = System.currentTimeMillis();
/**
* Gets the credits attribute of the AbstractLesson object
*
* @return The credits value
*/
public Element getCredits()
{
return super.getCustomCredits("By Rogan Dawes of ", ASPECT_LOGO);
}
protected String newCookie(WebSession s)
{
long now = System.currentTimeMillis();
seq++;
if (seq % 29 == 0)
{
String target = encode(seq++, lastTime + (now - lastTime) / 2);
sessionList.add(target);
s.setMessage(target);
if (sessionList.size() > 100) sessionList.remove(0);
}
lastTime = now;
return encode(seq, now);
}
private String encode(long seq, long time)
{
return new String(Long.toString(seq) + "-" + Long.toString(time));
}
/**
* Description of the Method
*
* @param s
* Description of the Parameter
* @return Description of the Return Value
*/
protected Element createContent(WebSession s)
{
try
{
String sessionid = s.getCookie(SESSIONID);
if (sessionid != null && sessionList.indexOf(sessionid) > -1)
{
return makeSuccess(s);
}
else
{
return makeLogin(s);
}
} catch (Exception e)
{
s.setMessage("Error generating " + this.getClass().getName());
e.printStackTrace();
}
return (null);
}
/**
* Gets the category attribute of the WeakAuthenticationCookie object
*
* @return The category value
*/
protected Category getDefaultCategory()
{
return Category.SESSION_MANAGEMENT;
}
/**
* Gets the hints attribute of the CookieScreen object
*
* @return The hints value
*/
protected List<String> getHints(WebSession s)
{
List<String> hints = new ArrayList<String>();
hints.add("The server skips authentication if you send the right cookie.");
hints.add("Is the cookie value predictable? Can you see gaps where someone else has acquired a cookie?");
hints.add("Try harder, you brute!");
hints.add("The first part of the cookie is a sequential number, the second part is milliseconds.");
hints.add("After the 29th try, the skipped identifier is printed to your screen. Use that to login.");
return hints;
}
private final static Integer DEFAULT_RANKING = new Integer(90);
protected Integer getDefaultRanking()
{
return DEFAULT_RANKING;
}
/**
* Gets the title attribute of the CookieScreen object
*
* @return The title value
*/
public String getTitle()
{
return ("Hijack a Session");
}
/**
* Description of the Method
*
* @param s
* Description of the Parameter
* @return Description of the Return Value
*/
protected Element makeLogin(WebSession s)
{
ElementContainer ec = new ElementContainer();
String weakid = s.getCookie(SESSIONID);
if (weakid == null)
{
weakid = newCookie(s);
Cookie cookie = new Cookie(SESSIONID, weakid);
s.getResponse().addCookie(cookie);
}
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);
}
String username = null;
String password = null;
try
{
username = s.getParser().getStringParameter(USERNAME);
} catch (ParameterNotFoundException pnfe)
{
}
try
{
password = s.getParser().getStringParameter(PASSWORD);
} catch (ParameterNotFoundException pnfe)
{
}
if (username != null || password != null)
{
s.setMessage("Invalid username or password.");
}
TR tr = new TR();
tr.addElement(new TH().addElement("Please sign in to your 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(" ").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, "");
Input input3 = new Input(Input.HIDDEN, SESSIONID, weakid);
row1.addElement(new TD(input1));
row2.addElement(new TD(input2));
t.addElement(row1);
t.addElement(row2);
t.addElement(input3);
Element b = ECSFactory.makeButton("Login");
t.addElement(new TR(new TD(b)));
ec.addElement(t);
return (ec);
}
}