/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE606_Unchecked_Loop_Condition__listen_tcp_31.java
Label Definition File: CWE606_Unchecked_Loop_Condition.label.xml
Template File: sources-sinks-31.tmpl.java
*/
/*
 * @description
 * CWE: 606 Unchecked Input for Loop Condition
 * BadSource: listen_tcp Read data using a listening tcp connection
 * GoodSource: hardcoded int in string form
 * Sinks:
 *    GoodSink: validate loop variable
 *    BadSink : loop variable not validated
 * Flow Variant: 31 Data flow: make a copy of data within the same method
 *
 * */







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

import java.util.logging.Level;

public class CWE606_Unchecked_Loop_Condition__listen_tcp_31 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        String dataCopy;
        {
            String data;

            data = ""; /* Initialize data */

            /* Read data using a listening tcp connection */
            {
                ServerSocket listener = null;
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;

                /* Read data using a listening tcp connection */
                try
                {
                    listener = new ServerSocket(39543);
                    socket = listener.accept();

                    /* read input from socket */

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

                    /* POTENTIAL FLAW: Read data using a listening tcp connection */
                    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);
                    }

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

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

            dataCopy = data;
        }
        {
            String data = dataCopy;

            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");
            }

        }
    }

    public void good() throws Throwable
    {
        goodG2B();
        goodB2G();
    }

    /* goodG2B() - use goodsource and badsink */
    private void goodG2B() throws Throwable
    {
        String dataCopy;
        {
            String data;

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

            dataCopy = data;
        }
        {
            String data = dataCopy;

            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 void goodB2G() throws Throwable
    {
        String dataCopy;
        {
            String data;

            data = ""; /* Initialize data */

            /* Read data using a listening tcp connection */
            {
                ServerSocket listener = null;
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;

                /* Read data using a listening tcp connection */
                try
                {
                    listener = new ServerSocket(39543);
                    socket = listener.accept();

                    /* read input from socket */

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

                    /* POTENTIAL FLAW: Read data using a listening tcp connection */
                    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);
                    }

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

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

            dataCopy = data;
        }
        {
            String data = dataCopy;

            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");
                }
            }

        }
    }

    /* 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);
    }
}
