/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE80_XSS__CWE182_Servlet_getParameter_Servlet_17.java
Label Definition File: CWE80_XSS__CWE182_Servlet.label.xml
Template File: sources-sink-17.tmpl.java
*/
/*
* @description
* CWE: 80 Cross Site Scripting (XSS)
* BadSource: getParameter_Servlet Read data from a querystring using getParameter()
* GoodSource: A hardcoded string
* BadSink:  Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS (CWE 182: Collapse of Data into Unsafe Value)
* Flow Variant: 17 Control flow: for loops
*
* */




import javax.servlet.http.*;


public class CWE80_XSS__CWE182_Servlet_getParameter_Servlet_17 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

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

        for (int i = 0; i < 1; i++)
        {
            if (data != null)
            {
                /* POTENTIAL FLAW: Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS with strings like <scr<script>ipt> (CWE 182: Collapse of Data into Unsafe Value) */
                response.getWriter().println("<br>bad(): data = " + data.replaceAll("(<script>)", ""));
            }
        }
    }

    /* goodG2B() - use goodsource and badsink by reversing the block outside the
     * for statement with the one in the for statement */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        /* FIX: Use a hardcoded string */
        data = "foo";

        for (int i = 0; i < 1; i++)
        {
            if (data != null)
            {
                /* POTENTIAL FLAW: Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS with strings like <scr<script>ipt> (CWE 182: Collapse of Data into Unsafe Value) */
                response.getWriter().println("<br>bad(): data = " + data.replaceAll("(<script>)", ""));
            }
        }
    }

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