/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE113_HTTP_Response_Splitting__connect_tcp_setHeaderServlet_31.java
Label Definition File: CWE113_HTTP_Response_Splitting.label.xml
Template File: sources-sinks-31.tmpl.java
*/
/*
 * @description
 * CWE: 113 HTTP Response Splitting
 * BadSource: connect_tcp Read data using an outbound tcp connection
 * GoodSource: A hardcoded string
 * Sinks: setHeaderServlet
 *    GoodSink: URLEncode input
 *    BadSink : querystring to setHeader()
 * Flow Variant: 31 Data flow: make a copy of data within the same method
 *
 * */




import javax.servlet.http.*;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.Socket;

import java.util.logging.Level;

import java.net.URLEncoder;

public class CWE113_HTTP_Response_Splitting__connect_tcp_setHeaderServlet_31 extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String dataCopy;
        {
            String data;

            data = ""; /* Initialize data */

            /* Read data using an outbound tcp connection */
            {
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;

                try
                {
                    /* Read data using an outbound tcp connection */
                    socket = new Socket("host.example.org", 39544);

                    /* read input from socket */

                    readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);

                    /* POTENTIAL FLAW: Read data using an outbound tcp connection */
                    data = readerBuffered.readLine();
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* clean up stream reading objects */
                    try
                    {
                        if (readerBuffered != null)
                        {
                            readerBuffered.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                    }

                    try
                    {
                        if (readerInputStream != null)
                        {
                            readerInputStream.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                    }

                    /* clean up socket objects */
                    try
                    {
                        if (socket != null)
                        {
                            socket.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO);
                    }
                }
            }

            dataCopy = data;
        }
        {
            String data = dataCopy;

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

        }
    }

    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
    {
        String dataCopy;
        {
            String data;

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

            dataCopy = data;
        }
        {
            String data = dataCopy;

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

        }
    }

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

            data = ""; /* Initialize data */

            /* Read data using an outbound tcp connection */
            {
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;

                try
                {
                    /* Read data using an outbound tcp connection */
                    socket = new Socket("host.example.org", 39544);

                    /* read input from socket */

                    readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);

                    /* POTENTIAL FLAW: Read data using an outbound tcp connection */
                    data = readerBuffered.readLine();
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* clean up stream reading objects */
                    try
                    {
                        if (readerBuffered != null)
                        {
                            readerBuffered.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                    }

                    try
                    {
                        if (readerInputStream != null)
                        {
                            readerInputStream.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                    }

                    /* clean up socket objects */
                    try
                    {
                        if (socket != null)
                        {
                            socket.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO);
                    }
                }
            }

            dataCopy = data;
        }
        {
            String data = dataCopy;

            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);
            }

        }
    }

    /* 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);
    }
}
