/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE190_Integer_Overflow__int_getParameter_Servlet_preinc_41.java
Label Definition File: CWE190_Integer_Overflow__int.label.xml
Template File: sources-sinks-41.tmpl.java
*/
/*
 * @description
 * CWE: 190 Integer Overflow
 * BadSource: getParameter_Servlet Read data from a querystring using getParameter()
 * GoodSource: A hardcoded non-zero, non-min, non-max, even number
 * Sinks: increment
 *    GoodSink: Ensure there will not be an overflow before incrementing data
 *    BadSink : Increment data, which can cause an overflow
 * Flow Variant: 41 Data flow: data passed as an argument from one method to another in the same class
 *
 * */

package testcases.CWE190_Integer_Overflow.s07;
import testcasesupport.*;

import javax.servlet.http.*;


import java.util.logging.Level;

public class CWE190_Integer_Overflow__int_getParameter_Servlet_preinc_41 extends AbstractTestCaseServlet
{
    private void badSink(int data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {

        /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
        int result = (int)(++data);

        IO.writeLine("result: " + result);

    }

    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);
            }
        }

        badSink(data , request, response );
    }

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

    private void goodG2BSink(int data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {

        /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
        int result = (int)(++data);

        IO.writeLine("result: " + result);

    }

    /* 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;

        goodG2BSink(data , request, response );
    }

    private void goodB2GSink(int data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {

        /* FIX: Add a check to prevent an overflow from occurring */
        if (data < Integer.MAX_VALUE)
        {
            int result = (int)(++data);
            IO.writeLine("result: " + result);
        }
        else
        {
            IO.writeLine("data value is too large to increment.");
        }

    }

    /* 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);
            }
        }

        goodB2GSink(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);
    }
}
