/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE191_Integer_Underflow__int_getParameter_Servlet_sub_73a.java
Label Definition File: CWE191_Integer_Underflow__int.label.xml
Template File: sources-sinks-73a.tmpl.java
*/
/*
 * @description
 * CWE: 191 Integer Underflow
 * BadSource: getParameter_Servlet Read data from a querystring using getParameter()
 * GoodSource: A hardcoded non-zero, non-min, non-max, even number
 * Sinks: sub
 *    GoodSink: Ensure there will not be an underflow before subtracting 1 from data
 *    BadSink : Subtract 1 from data, which can cause an Underflow
 * Flow Variant: 73 Data flow: data passed in a LinkedList from one method to another in different source files in the same package
 *
 * */



import java.util.LinkedList;

import javax.servlet.http.*;


import java.util.logging.Level;

public class CWE191_Integer_Underflow__int_getParameter_Servlet_sub_73a extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        int data;

        data = Integer.MIN_VALUE; /* Initialize data */

        /* POTENTIAL FLAW: Read data from a querystring using getParameter() */
        {
            String stringNumber = request.getParameter("name");

            try
            {
                data = Integer.parseInt(stringNumber.trim());
            }
            catch(NumberFormatException exceptNumberFormat)
            {
                IO.logger.log(Level.WARNING, "Number format exception reading data from parameter 'name'", exceptNumberFormat);
            }
        }

        LinkedList<Integer> dataLinkedList = new LinkedList<Integer>();
        dataLinkedList.add(0, data);
        dataLinkedList.add(1, data);
        dataLinkedList.add(2, data);
        (new CWE191_Integer_Underflow__int_getParameter_Servlet_sub_73b()).badSink(dataLinkedList , 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
    {
        int data;

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

        LinkedList<Integer> dataLinkedList = new LinkedList<Integer>();
        dataLinkedList.add(0, data);
        dataLinkedList.add(1, data);
        dataLinkedList.add(2, data);
        (new CWE191_Integer_Underflow__int_getParameter_Servlet_sub_73b()).goodG2BSink(dataLinkedList , request, response );
    }

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

        data = Integer.MIN_VALUE; /* Initialize data */

        /* POTENTIAL FLAW: Read data from a querystring using getParameter() */
        {
            String stringNumber = request.getParameter("name");

            try
            {
                data = Integer.parseInt(stringNumber.trim());
            }
            catch(NumberFormatException exceptNumberFormat)
            {
                IO.logger.log(Level.WARNING, "Number format exception reading data from parameter 'name'", exceptNumberFormat);
            }
        }

        LinkedList<Integer> dataLinkedList = new LinkedList<Integer>();
        dataLinkedList.add(0, data);
        dataLinkedList.add(1, data);
        dataLinkedList.add(2, data);
        (new CWE191_Integer_Underflow__int_getParameter_Servlet_sub_73b()).goodB2GSink(dataLinkedList , 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);
    }

}
