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.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.*;
/*******************************************************************************
*
*
* 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 WeakAuthenticationCookie 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 AUTHCOOKIE = "AuthCookie";
/**
* Description of the Field
*/
protected final static String LOGOUT = "WACLogout";
/**
* 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
* @exception Exception
* Description of the Exception
*/
protected String checkCookie(WebSession s) throws Exception
{
String cookie = getCookie(s);
if (cookie != null)
{
if (cookie.equals(encode("webgoat12345")))
{
return ("webgoat");
}
if (cookie.equals(encode("aspect12345")))
{
return ("aspect");
}
if (cookie.equals(encode("alice12345")))
{
makeSuccess(s);
return ("alice");
} else
{
s.setMessage("Invalid cookie");
s.eatCookies();
}
}
return (null);
}
/**
* Description of the Method
*
* @param s
* Description of the Parameter
* @return Description of the Return Value
* @exception Exception
* Description of the Exception
*/
protected String checkParams(WebSession s) throws Exception
{
String username = s.getParser().getStringParameter(USERNAME, "");
String password = s.getParser().getStringParameter(PASSWORD, "");
if ((username.length() > 0) && (password.length() > 0))
{
String loginID = "";
if (username.equals("webgoat") && password.equals("webgoat"))
{
loginID = encode("webgoat12345");
} else if (username.equals("aspect") && password.equals("aspect"))
{
loginID = encode("aspect12345");
}
if (loginID != "")
{
Cookie newCookie = new Cookie(AUTHCOOKIE, loginID);
s.setMessage("Your identity has been remembered");
s.getResponse().addCookie(newCookie);
return (username);
} else
{
s.setMessage("Invalid username and password entered.");
}
}
return (null);
}
/**
* Description of the Method
*
* @param s
* Description of the Parameter
* @return Description of the Return Value
*/
protected Element createContent(WebSession s)
{
boolean logout = s.getParser().getBooleanParameter(LOGOUT, false);
if (logout)
{
s.setMessage("Goodbye! Your password has been forgotten");
s.eatCookies();
return (makeLogin(s));
}
try
{
String user = checkCookie(s);
if ((user != null) && (user.length() > 0))
{
return (makeUser(s, user, "COOKIE"));
}
user = checkParams(s);
if ((user != null) && (user.length() > 0))
{
return (makeUser(s, user, "PARAMETERS"));
}
}
catch (Exception e)
{
s.setMessage("Error generating " + this.getClass().getName());
e.printStackTrace();
}
return (makeLogin(s));
}
/**
* Description of the Method
*
* @param value
* Description of the Parameter
* @return Description of the Return Value
*/
private String encode(String value)
{
// <START_OMIT_SOURCE>
StringBuffer encoded = new StringBuffer();
for (int i = 0; i < value.length(); i++)
{
encoded.append(String.valueOf((char) (value.charAt(i) + 1)));
}
return encoded.reverse().toString();
// <END_OMIT_SOURCE>
}
/**
* Gets the category attribute of the WeakAuthenticationCookie object
*
* @return The category value
*/
protected Category getDefaultCategory()
{
return Category.SESSION_MANAGEMENT;
}
/**
* Gets the cookie attribute of the CookieScreen object
*
* @param s
* Description of the Parameter
* @return The cookie value
*/
protected String getCookie(WebSession s)
{
Cookie[] cookies = s.getRequest().getCookies();
for (int i = 0; i < cookies.length; i++)
{
if (cookies[i].getName().equalsIgnoreCase(AUTHCOOKIE))
{
return (cookies[i].getValue());
}
}
return (null);
}
/**
* 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 authenticates the user using a cookie, if you send the right cookie.");
hints.add("Is the AuthCookie value guessable knowing the username and password?");
hints.add("Add 'AuthCookie=********;' to the Cookie: header using "
+ "<A href=\"http://www.owasp.org/development/webscarab\">WebScarab</A>.");
hints.add("After logging in as webgoat a cookie is added. 65432ubphcfx<br/>" +
"After logging in as aspect a cookie is added. 65432udfqtb<br/>" +
"Is there anything similar about the cookies and the login names?");
return hints;
}
/**
* Gets the instructions attribute of the WeakAuthenticationCookie object
*
* @return The instructions value
*/
public String getInstructions(WebSession s)
{
String instructions = "Login using the webgoat/webgoat account to see what happens. You may also try aspect/aspect. When you understand the authentication cookie, try changing your identity to alice.";
return (instructions);
}
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 ("Spoof an Authentication Cookie");
}
/**
* 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();
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(" ").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);
}
/**
* 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));
ec.addElement(new P().addElement(ECSFactory.makeLink("Logout", LOGOUT, true)));
ec.addElement(new P().addElement(ECSFactory.makeLink("Refresh", "", "")));
return (ec);
}
public Element getCredits()
{
return super.getCustomCredits("", ASPECT_LOGO);
}
}