/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE643_Xpath_Injection__getQueryString_Servlet_81a.java
Label Definition File: CWE643_Xpath_Injection.label.xml
Template File: sources-sinks-81a.tmpl.java
*/
/*
 * @description
 * CWE: 643 Xpath Injection
 * BadSource: getQueryString_Servlet Parse id param out of the URL query string (without using getParameter())
 * GoodSource: A hardcoded string
 * Sinks:
 *    GoodSink: validate input through StringEscapeUtils
 *    BadSink : user input is used without validate
 * Flow Variant: 81 Data flow: data passed in a parameter to an abstract method
 *
 * */





import javax.servlet.http.*;

import java.util.StringTokenizer;

public class CWE643_Xpath_Injection__getQueryString_Servlet_81a extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* initialize data in case id is not in query string */

        /* POTENTIAL FLAW: Parse id param out of the URL querystring (without using getParameter()) */
        {
            StringTokenizer tokenizer = new StringTokenizer(request.getQueryString(), "&");
            while (tokenizer.hasMoreTokens())
            {
                String token = tokenizer.nextToken(); /* a token will be like "id=foo" */
                if(token.startsWith("id=")) /* check if we have the "id" parameter" */
                {
                    data = token.substring(3); /* set data to "foo" */
                    break; /* exit while loop */
                }
            }
        }

        CWE643_Xpath_Injection__getQueryString_Servlet_81_base baseObject = new CWE643_Xpath_Injection__getQueryString_Servlet_81_bad();
        baseObject.action(data , request, response);
    }

    public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        goodG2B(request, response);
        goodB2G(request, response);
    }

    /* goodG2B() - use GoodSource and BadSink */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        /* FIX: Use a hardcoded string */
        data = "foo";

        CWE643_Xpath_Injection__getQueryString_Servlet_81_base baseObject = new CWE643_Xpath_Injection__getQueryString_Servlet_81_goodG2B();
        baseObject.action(data , request, response);
    }

    /* goodB2G() - use BadSource and GoodSink */
    private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* initialize data in case id is not in query string */

        /* POTENTIAL FLAW: Parse id param out of the URL querystring (without using getParameter()) */
        {
            StringTokenizer tokenizer = new StringTokenizer(request.getQueryString(), "&");
            while (tokenizer.hasMoreTokens())
            {
                String token = tokenizer.nextToken(); /* a token will be like "id=foo" */
                if(token.startsWith("id=")) /* check if we have the "id" parameter" */
                {
                    data = token.substring(3); /* set data to "foo" */
                    break; /* exit while loop */
                }
            }
        }

        CWE643_Xpath_Injection__getQueryString_Servlet_81_base baseObject = new CWE643_Xpath_Injection__getQueryString_Servlet_81_goodB2G();
        baseObject.action(data , request, response);
    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}
