/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE606_Unchecked_Loop_Condition__getCookies_Servlet_42.java
Label Definition File: CWE606_Unchecked_Loop_Condition.label.xml
Template File: sources-sinks-42.tmpl.java
*/
/*
 * @description
 * CWE: 606 Unchecked Input for Loop Condition
 * BadSource: getCookies_Servlet Read data from the first cookie using getCookies()
 * GoodSource: hardcoded int in string form
 * Sinks:
 *    GoodSink: validate loop variable
 *    BadSink : loop variable not validated
 * Flow Variant: 42 Data flow: data returned from one method to another in the same class
 *
 * */





import javax.servlet.http.*;


public class CWE606_Unchecked_Loop_Condition__getCookies_Servlet_42 extends AbstractTestCaseServlet
{
    private String badSource(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* 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 */
                data = cookieSources[0].getValue();
            }
        }

        return data;
    }

    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data = badSource(request, response);

        int numberOfLoops;
        try
        {
            numberOfLoops = Integer.parseInt(data);
        }
        catch (NumberFormatException exceptNumberFormat)
        {
            IO.writeLine("Invalid response. Numeric input expected. Assuming 1.");
            numberOfLoops = 1;
        }

        for (int i=0; i < numberOfLoops; i++)
        {
            /* POTENTIAL FLAW: user supplied input used for loop counter test */
            IO.writeLine("hello world");
        }

    }

    /* goodG2B() - use goodsource and badsink */
    private String goodG2BSource(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        /* FIX: Use a hardcoded int as a string */
        data = "5";

        return data;
    }

    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data = goodG2BSource(request, response);

        int numberOfLoops;
        try
        {
            numberOfLoops = Integer.parseInt(data);
        }
        catch (NumberFormatException exceptNumberFormat)
        {
            IO.writeLine("Invalid response. Numeric input expected. Assuming 1.");
            numberOfLoops = 1;
        }

        for (int i=0; i < numberOfLoops; i++)
        {
            /* POTENTIAL FLAW: user supplied input used for loop counter test */
            IO.writeLine("hello world");
        }

    }

    /* goodB2G() - use badsource and goodsink */
    private String goodB2GSource(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* 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 */
                data = cookieSources[0].getValue();
            }
        }

        return data;
    }

    private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data = goodB2GSource(request, response);

        int numberOfLoops;
        try
        {
            numberOfLoops = Integer.parseInt(data);
        }
        catch (NumberFormatException exceptNumberFormat)
        {
            IO.writeLine("Invalid response. Numeric input expected. Assuming 1.");
            numberOfLoops = 1;
        }

        /* FIX: loop number thresholds validated */
        if (numberOfLoops >= 0 && numberOfLoops <= 5)
        {
            for (int i=0; i < numberOfLoops; i++)
            {
                IO.writeLine("hello world");
            }
        }

    }

    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);
    }
}
