/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE113_HTTP_Response_Splitting__Property_setHeaderServlet_12.java
Label Definition File: CWE113_HTTP_Response_Splitting.label.xml
Template File: sources-sinks-12.tmpl.java
*/
/*
* @description
* CWE: 113 HTTP Response Splitting
* BadSource: Property Read data from a system property
* GoodSource: A hardcoded string
* Sinks: setHeaderServlet
*    GoodSink: URLEncode input
*    BadSink : querystring to setHeader()
* Flow Variant: 12 Control flow: if(IO.staticReturnsTrueOrFalse())
*
* */




import javax.servlet.http.*;

import java.net.URLEncoder;

public class CWE113_HTTP_Response_Splitting__Property_setHeaderServlet_12 extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if(IO.staticReturnsTrueOrFalse())
        {
            /* get system property user.home */
            /* POTENTIAL FLAW: Read data from a system property */
            data = System.getProperty("user.home");
        }
        else
        {

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

        }

        if(IO.staticReturnsTrueOrFalse())
        {
            if (data != null)
            {
                /* POTENTIAL FLAW: Input not verified before inclusion in header */
                response.setHeader("Location", "/author.jsp?lang=" + data);
            }
        }
        else
        {

            if (data != null)
            {
                /* FIX: use URLEncoder.encode to hex-encode non-alphanumerics */
                data = URLEncoder.encode(data, "UTF-8");
                response.setHeader("Location", "/author.jsp?lang=" + data);
            }

        }
    }

    /* goodG2B() - use goodsource and badsink by changing the first "if" so that
     * both branches use the GoodSource */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if(IO.staticReturnsTrueOrFalse())
        {
            /* FIX: Use a hardcoded string */
            data = "foo";
        }
        else
        {

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

        }

        if(IO.staticReturnsTrueOrFalse())
        {
            if (data != null)
            {
                /* POTENTIAL FLAW: Input not verified before inclusion in header */
                response.setHeader("Location", "/author.jsp?lang=" + data);
            }
        }
        else
        {

            if (data != null)
            {
                /* POTENTIAL FLAW: Input not verified before inclusion in header */
                response.setHeader("Location", "/author.jsp?lang=" + data);
            }

        }
    }

    /* goodB2G() - use badsource and goodsink by changing the second "if" so that
     * both branches use the GoodSink */
    private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if(IO.staticReturnsTrueOrFalse())
        {
            /* get system property user.home */
            /* POTENTIAL FLAW: Read data from a system property */
            data = System.getProperty("user.home");
        }
        else
        {

            /* get system property user.home */
            /* POTENTIAL FLAW: Read data from a system property */
            data = System.getProperty("user.home");

        }

        if(IO.staticReturnsTrueOrFalse())
        {
            if (data != null)
            {
                /* FIX: use URLEncoder.encode to hex-encode non-alphanumerics */
                data = URLEncoder.encode(data, "UTF-8");
                response.setHeader("Location", "/author.jsp?lang=" + data);
            }
        }
        else
        {

            if (data != null)
            {
                /* FIX: use URLEncoder.encode to hex-encode non-alphanumerics */
                data = URLEncoder.encode(data, "UTF-8");
                response.setHeader("Location", "/author.jsp?lang=" + data);
            }

        }
    }

    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);
    }
}
