/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE369_Divide_by_Zero__float_connect_tcp_modulo_75b.java
Label Definition File: CWE369_Divide_by_Zero__float.label.xml
Template File: sources-sinks-75b.tmpl.java
*/
/*
 * @description
 * CWE: 369 Divide by zero
 * BadSource: connect_tcp Read data using an outbound tcp connection
 * GoodSource: A hardcoded non-zero number (two)
 * Sinks: modulo
 *    GoodSink: Check for zero before modulo
 *    BadSink : Modulo by a value that may be zero
 * Flow Variant: 75 Data flow: data passed in a serialized object from one method to another in different source files in the same package
 *
 * */



import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.util.logging.Level;

public class CWE369_Divide_by_Zero__float_connect_tcp_modulo_75b
{
    public void badSink(byte[] dataSerialized ) throws Throwable
    {
        /* unserialize data */
        ByteArrayInputStream streamByteArrayInput = null;
        ObjectInputStream streamObjectInput = null;

        try
        {
            streamByteArrayInput = new ByteArrayInputStream(dataSerialized);
            streamObjectInput = new ObjectInputStream(streamByteArrayInput);
            float data = (Float)streamObjectInput.readObject();

            /* POTENTIAL FLAW: Possibly modulo by zero */
            int result = (int)(100.0 % data);
            IO.writeLine(result);

        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "IOException in deserialization", exceptIO);
        }
        catch (ClassNotFoundException exceptClassNotFound)
        {
            IO.logger.log(Level.WARNING, "ClassNotFoundException in deserialization", exceptClassNotFound);
        }
        finally
        {
            /* clean up stream reading objects */
            try
            {
                if (streamObjectInput != null)
                {
                    streamObjectInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ObjectInputStream", exceptIO);
            }

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

    /* goodG2B() - use GoodSource and BadSink */
    public void goodG2BSink(byte[] dataSerialized ) throws Throwable
    {
        /* unserialize data */
        ByteArrayInputStream streamByteArrayInput = null;
        ObjectInputStream streamObjectInput = null;

        try {
            streamByteArrayInput = new ByteArrayInputStream(dataSerialized);
            streamObjectInput = new ObjectInputStream(streamByteArrayInput);
            float data = (Float)streamObjectInput.readObject();

            /* POTENTIAL FLAW: Possibly modulo by zero */
            int result = (int)(100.0 % data);
            IO.writeLine(result);

        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "IOException in deserialization", exceptIO);
        }
        catch (ClassNotFoundException exceptClassNotFound)
        {
            IO.logger.log(Level.WARNING, "ClassNotFoundException in deserialization", exceptClassNotFound);
        }
        finally
        {
            /* clean up stream reading objects */
            try
            {
                if (streamObjectInput != null)
                {
                    streamObjectInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ObjectInputStream", exceptIO);
            }

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

    /* goodB2G() - use BadSource and GoodSink */
    public void goodB2GSink(byte[] dataSerialized ) throws Throwable
    {
        /* unserialize data */
        ByteArrayInputStream streamByteArrayInput = null;
        ObjectInputStream streamObjectInput = null;

        try
        {
            streamByteArrayInput = new ByteArrayInputStream(dataSerialized);
            streamObjectInput = new ObjectInputStream(streamByteArrayInput);
            float data = (Float)streamObjectInput.readObject();

            /* FIX: Check for value of or near zero before modulo */
            if (Math.abs(data) > 0.000001)
            {
                int result = (int)(100.0 % data);
                IO.writeLine(result);
            }
            else
            {
                IO.writeLine("This would result in a modulo by zero");
            }

        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "IOException in deserialization", exceptIO);
        }
        catch (ClassNotFoundException exceptClassNotFound)
        {
            IO.logger.log(Level.WARNING, "ClassNotFoundException in deserialization", exceptClassNotFound);
        }
        finally
        {
            /* clean up stream reading objects */
            try
            {
                if (streamObjectInput != null)
                {
                    streamObjectInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ObjectInputStream", exceptIO);
            }

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