/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE190_Integer_Overflow__int_getCookies_Servlet_add_31.java
Label Definition File: CWE190_Integer_Overflow__int.label.xml
Template File: sources-sinks-31.tmpl.java
*/
/*
 * @description
 * CWE: 190 Integer Overflow
 * BadSource: getCookies_Servlet Read data from the first cookie using getCookies()
 * GoodSource: A hardcoded non-zero, non-min, non-max, even number
 * Sinks: add
 *    GoodSink: Ensure there will not be an overflow before adding 1 to data
 *    BadSink : Add 1 to data, which can cause an overflow
 * Flow Variant: 31 Data flow: make a copy of data within the same method
 *
 * */




import javax.servlet.http.*;


import java.util.logging.Level;

public class CWE190_Integer_Overflow__int_getCookies_Servlet_add_31 extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        int dataCopy;
        {
            int data;

            data = Integer.MIN_VALUE; /* initialize data in case there are no cookies */

            /* Read data from cookies */
            {
                Cookie cookieSources[] = request.getCookies();
                if (cookieSources != null)
                {
                    /* POTENTIAL FLAW: Read data from the first cookie value */
                    String stringNumber = cookieSources[0].getValue();
                    try
                    {
                        data = Integer.parseInt(stringNumber.trim());
                    }
                    catch(NumberFormatException exceptNumberFormat)
                    {
                        IO.logger.log(Level.WARNING, "Number format exception reading data from cookie", exceptNumberFormat);
                    }
                }
            }

            dataCopy = data;
        }
        {
            int data = dataCopy;

            /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
            int result = (int)(data + 1);

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

        }
    }

    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 dataCopy;
        {
            int data;

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

            dataCopy = data;
        }
        {
            int data = dataCopy;

            /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
            int result = (int)(data + 1);

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

        }
    }

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

            data = Integer.MIN_VALUE; /* initialize data in case there are no cookies */

            /* Read data from cookies */
            {
                Cookie cookieSources[] = request.getCookies();
                if (cookieSources != null)
                {
                    /* POTENTIAL FLAW: Read data from the first cookie value */
                    String stringNumber = cookieSources[0].getValue();
                    try
                    {
                        data = Integer.parseInt(stringNumber.trim());
                    }
                    catch(NumberFormatException exceptNumberFormat)
                    {
                        IO.logger.log(Level.WARNING, "Number format exception reading data from cookie", exceptNumberFormat);
                    }
                }
            }

            dataCopy = data;
        }
        {
            int data = dataCopy;

            /* FIX: Add a check to prevent an overflow from occurring */
            if (data < Integer.MAX_VALUE)
            {
                int result = (int)(data + 1);
                IO.writeLine("result: " + result);
            }
            else
            {
                IO.writeLine("data value is too large to perform addition.");
            }

        }
    }

    /* 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);
    }
}
