/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE601_Open_Redirect__Servlet_File_17.java
Label Definition File: CWE601_Open_Redirect__Servlet.label.xml
Template File: sources-sink-17.tmpl.java
*/
/*
* @description
* CWE: 601 Open Redirect
* BadSource: File Read data from file (named c:\data.txt)
* GoodSource: A hardcoded string
* BadSink:  place redirect string directly into redirect api call
* Flow Variant: 17 Control flow: for loops
*
* */





import javax.servlet.http.*;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.FileInputStream;
import java.io.File;
import java.io.IOException;

import java.util.logging.Level;

import java.net.URI;
import java.net.URISyntaxException;

public class CWE601_Open_Redirect__Servlet_File_17 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* Initialize data */
        {
            File file = new File("C:\\data.txt");
            FileInputStream streamFileInput = null;
            InputStreamReader readerInputStream = null;
            BufferedReader readerBuffered = null;

            try
            {
                /* read string from file into data */
                streamFileInput = new FileInputStream(file);
                readerInputStream = new InputStreamReader(streamFileInput, "UTF-8");
                readerBuffered = new BufferedReader(readerInputStream);

                /* POTENTIAL FLAW: Read data from a file */
                /* This will be reading the first "line" of the file, which
                 * could be very long if there are little or no newlines in the file */
                data = readerBuffered.readLine();
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
            }
            finally
            {
                /* Close 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);
                }

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

        for (int i = 0; i < 1; i++)
        {
            if (data != null)
            {
                /* This prevents \r\n (and other chars) and should prevent incidentals such
                 * as HTTP Response Splitting and HTTP Header Injection.
                 */
                URI uri;
                try
                {
                    uri = new URI(data);
                }
                catch (URISyntaxException exceptURISyntax)
                {
                    response.getWriter().write("Invalid redirect URL");
                    return;
                }
                /* POTENTIAL FLAW: redirect is sent verbatim; escape the string to prevent ancillary issues like XSS, Response splitting etc */
                response.sendRedirect(data);
                return;
            }
        }
    }

    /* 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)
            {
                /* This prevents \r\n (and other chars) and should prevent incidentals such
                 * as HTTP Response Splitting and HTTP Header Injection.
                 */
                URI uri;
                try
                {
                    uri = new URI(data);
                }
                catch (URISyntaxException exceptURISyntax)
                {
                    response.getWriter().write("Invalid redirect URL");
                    return;
                }
                /* POTENTIAL FLAW: redirect is sent verbatim; escape the string to prevent ancillary issues like XSS, Response splitting etc */
                response.sendRedirect(data);
                return;
            }
        }
    }

    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);
    }
}
