/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE129_Improper_Validation_of_Array_Index__getCookies_Servlet_array_read_check_max_17.java
Label Definition File: CWE129_Improper_Validation_of_Array_Index.label.xml
Template File: sources-sinks-17.tmpl.java
*/
/*
* @description
* CWE: 129 Improper Validation of Array Index
* BadSource: getCookies_Servlet Read data from the first cookie using getCookies()
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: array_read_check_max
*    GoodSink: Read from array after verifying index is at least 0 and less than array.length
*    BadSink : Read from array after verifying that data less than array.length (but not verifying that data is at least 0)
* Flow Variant: 17 Control flow: for loops
*
* */




import javax.servlet.http.*;


import java.util.logging.Level;

public class CWE129_Improper_Validation_of_Array_Index__getCookies_Servlet_array_read_check_max_17 extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        int data;

        /* We need to have one source outside of a for loop in order
         * to prevent the Java compiler from generating an error because
         * data is uninitialized
         */

        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);
                }
            }
        }

        for (int j = 0; j < 1; j++)
        {
            /* Need to ensure that the array is of size > 3  and < 101 due to the GoodSource and the large_fixed BadSource */
            int array[] = { 0, 1, 2, 3, 4 };
            /* POTENTIAL FLAW: Verify that data < array.length, but don't verify that data > 0, so may be attempting to read out of the array bounds */
            if (data < array.length)
            {
                IO.writeLine(array[data]);
            }
            else
            {
                IO.writeLine("Array index out of bounds");
            }
        }
    }

    /* 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;

        for (int j = 0; j < 1; j++)
        {
            /* Need to ensure that the array is of size > 3  and < 101 due to the GoodSource and the large_fixed BadSource */
            int array[] = { 0, 1, 2, 3, 4 };
            /* POTENTIAL FLAW: Verify that data < array.length, but don't verify that data > 0, so may be attempting to read out of the array bounds */
            if (data < array.length)
            {
                IO.writeLine(array[data]);
            }
            else
            {
                IO.writeLine("Array index out of bounds");
            }
        }
    }

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

        for (int k = 0; k < 1; k++)
        {
            /* Need to ensure that the array is of size > 3  and < 101 due to the GoodSource and the large_fixed BadSource */
            int array[] = { 0, 1, 2, 3, 4 };
            /* FIX: Fully verify data before reading from array at location data */
            if (data >= 0 && data < array.length)
            {
                IO.writeLine(array[data]);
            }
            else
            {
                IO.writeLine("Array index out of bounds");
            }
        }
    }

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