/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE789_Uncontrolled_Mem_Alloc__getQueryString_Servlet_HashMap_02.java
Label Definition File: CWE789_Uncontrolled_Mem_Alloc.int.label.xml
Template File: sources-sink-02.tmpl.java
*/
/*
* @description
* CWE: 789 Uncontrolled Memory Allocation
* BadSource: getQueryString_Servlet Parse id param out of the URL query string (without using getParameter())
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* BadSink: HashMap Create a HashMap using data as the initial size
* Flow Variant: 02 Control flow: if(true) and if(false)
*
* */




import javax.servlet.http.*;


import java.util.StringTokenizer;
import java.util.logging.Level;

import java.util.HashMap;

public class CWE789_Uncontrolled_Mem_Alloc__getQueryString_Servlet_HashMap_02 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        int data;
        if (true)
        {
            data = Integer.MIN_VALUE; /* initialize data in case id is not in query string */
            /* POTENTIAL FLAW: Parse id param out of the URL querystring (without using getParam) */
            {
                StringTokenizer tokenizer = new StringTokenizer(request.getQueryString(), "&");
                while (tokenizer.hasMoreTokens())
                {
                    String token = tokenizer.nextToken(); /* a token will be like "id=33" */
                    if(token.startsWith("id=")) /* check if we have the "id" parameter" */
                    {
                        try
                        {
                            data = Integer.parseInt(token.substring(3)); /* set data to the int 33 */
                        }
                        catch(NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception reading id from query string", exceptNumberFormat);
                        }
                        break; /* exit while loop */
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        /* POTENTIAL FLAW: Create a HashMap using data as the initial size.  data may be very large, creating memory issues */
        HashMap intHashMap = new HashMap(data);

    }

    /* goodG2B1() - use goodsource and badsink by changing true to false */
    private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        int data;
        if (false)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }
        else
        {

            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;

        }

        /* POTENTIAL FLAW: Create a HashMap using data as the initial size.  data may be very large, creating memory issues */
        HashMap intHashMap = new HashMap(data);

    }

    /* goodG2B2() - use goodsource and badsink by reversing statements in if */
    private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        int data;
        if (true)
        {
            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        /* POTENTIAL FLAW: Create a HashMap using data as the initial size.  data may be very large, creating memory issues */
        HashMap intHashMap = new HashMap(data);

    }

    public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        goodG2B1(request, response);
        goodG2B2(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);
    }
}
