/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE190_Integer_Overflow__int_listen_tcp_preinc_06.java
Label Definition File: CWE190_Integer_Overflow__int.label.xml
Template File: sources-sinks-06.tmpl.java
*/
/*
* @description
* CWE: 190 Integer Overflow
* BadSource: listen_tcp Read data using a listening tcp connection
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: increment
*    GoodSink: Ensure there will not be an overflow before incrementing data
*    BadSink : Increment data, which can cause an overflow
* Flow Variant: 06 Control flow: if(PRIVATE_STATIC_FINAL_FIVE==5) and if(PRIVATE_STATIC_FINAL_FIVE!=5)
*
* */

package testcases.CWE190_Integer_Overflow.s07;
import testcasesupport.*;

import javax.servlet.http.*;

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 CWE190_Integer_Overflow__int_listen_tcp_preinc_06 extends AbstractTestCase
{
    /* The variable below is declared "final", so a tool should be able
     * to identify that reads of this will always give its initialized
     * value. */
    private static final int PRIVATE_STATIC_FINAL_FIVE = 5;

    public void bad() throws Throwable
    {
        int data;
        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            {
                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 */
                    String stringNumber = readerBuffered.readLine();
                    if (stringNumber != null) // avoid NPD incidental warnings
                    {
                        try
                        {
                            data = Integer.parseInt(stringNumber.trim());
                        }
                        catch(NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                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);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
            int result = (int)(++data);
            IO.writeLine("result: " + result);
        }
    }

    /* goodG2B1() - use goodsource and badsink by changing first PRIVATE_STATIC_FINAL_FIVE==5 to PRIVATE_STATIC_FINAL_FIVE!=5 */
    private void goodG2B1() throws Throwable
    {
        int data;
        if (PRIVATE_STATIC_FINAL_FIVE!=5)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }
        else
        {

            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;

        }

        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
            int result = (int)(++data);
            IO.writeLine("result: " + result);
        }
    }

    /* goodG2B2() - use goodsource and badsink by reversing statements in first if */
    private void goodG2B2() throws Throwable
    {
        int data;
        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            /* POTENTIAL FLAW: if data == Integer.MAX_VALUE, this will overflow */
            int result = (int)(++data);
            IO.writeLine("result: " + result);
        }
    }

    /* goodB2G1() - use badsource and goodsink by changing second PRIVATE_STATIC_FINAL_FIVE==5 to PRIVATE_STATIC_FINAL_FIVE!=5 */
    private void goodB2G1() throws Throwable
    {
        int data;
        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            {
                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 */
                    String stringNumber = readerBuffered.readLine();
                    if (stringNumber != null) // avoid NPD incidental warnings
                    {
                        try
                        {
                            data = Integer.parseInt(stringNumber.trim());
                        }
                        catch(NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                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);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (PRIVATE_STATIC_FINAL_FIVE!=5)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
            IO.writeLine("Benign, fixed string");
        }
        else
        {

            /* FIX: Add a check to prevent an overflow from occurring */
            if (data < Integer.MAX_VALUE)
            {
                int result = (int)(++data);
                IO.writeLine("result: " + result);
            }
            else
            {
                IO.writeLine("data value is too large to increment.");
            }

        }
    }

    /* goodB2G2() - use badsource and goodsink by reversing statements in second if  */
    private void goodB2G2() throws Throwable
    {
        int data;
        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            {
                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 */
                    String stringNumber = readerBuffered.readLine();
                    if (stringNumber != null) // avoid NPD incidental warnings
                    {
                        try
                        {
                            data = Integer.parseInt(stringNumber.trim());
                        }
                        catch(NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                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);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (PRIVATE_STATIC_FINAL_FIVE==5)
        {
            /* FIX: Add a check to prevent an overflow from occurring */
            if (data < Integer.MAX_VALUE)
            {
                int result = (int)(++data);
                IO.writeLine("result: " + result);
            }
            else
            {
                IO.writeLine("data value is too large to increment.");
            }
        }
    }

    public void good() throws Throwable
    {
        goodG2B1();
        goodG2B2();
        goodB2G1();
        goodB2G2();
    }

    /* 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);
    }
}
