/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE191_Integer_Underflow__int_console_readLine_multiply_16.java
Label Definition File: CWE191_Integer_Underflow__int.label.xml
Template File: sources-sinks-16.tmpl.java
*/
/*
* @description
* CWE: 191 Integer Underflow
* BadSource: console_readLine Read data from the console using readLine
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: multiply
*    GoodSink: Ensure there will not be an underflow before multiplying data by 2
*    BadSink : If data is negative, multiply by 2, which can cause an underflow
* Flow Variant: 16 Control flow: while(true)
*
* */






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

import java.util.logging.Level;

public class CWE191_Integer_Underflow__int_console_readLine_multiply_16 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        int data;

        while (true)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            {
                InputStreamReader readerInputStream = null;
                BufferedReader readerBuffered = null;
                /* read user input from console with readLine */
                try
                {
                    readerInputStream = new InputStreamReader(System.in, "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);
                    /* POTENTIAL FLAW: Read data from the console using readLine */
                    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
                {
                    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);
                    }
                }
            }
            /* NOTE: Tools may report a flaw here because readerBuffered and readerInputStream are not closed.  Unfortunately, closing those will close System.in, which will cause any future attempts to read from the console to fail and throw an exception */
            break;
        }

        while (true)
        {
            if(data < 0) /* ensure we won't have an overflow */
            {
                /* POTENTIAL FLAW: if (data * 2) < Integer.MIN_VALUE, this will underflow */
                int result = (int)(data * 2);
                IO.writeLine("result: " + result);
            }
            break;
        }
    }

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

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

        while (true)
        {
            if(data < 0) /* ensure we won't have an overflow */
            {
                /* POTENTIAL FLAW: if (data * 2) < Integer.MIN_VALUE, this will underflow */
                int result = (int)(data * 2);
                IO.writeLine("result: " + result);
            }
            break;
        }

    }

    /* goodB2G() - use badsource and goodsink */
    private void goodB2G() throws Throwable
    {
        int data;

        while (true)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            {
                InputStreamReader readerInputStream = null;
                BufferedReader readerBuffered = null;
                /* read user input from console with readLine */
                try
                {
                    readerInputStream = new InputStreamReader(System.in, "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);
                    /* POTENTIAL FLAW: Read data from the console using readLine */
                    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
                {
                    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);
                    }
                }
            }
            /* NOTE: Tools may report a flaw here because readerBuffered and readerInputStream are not closed.  Unfortunately, closing those will close System.in, which will cause any future attempts to read from the console to fail and throw an exception */
            break;
        }

        while (true)
        {
            if(data < 0) /* ensure we won't have an overflow */
            {
                /* FIX: Add a check to prevent an underflow from occurring */
                if (data > (Integer.MIN_VALUE/2))
                {
                    int result = (int)(data * 2);
                    IO.writeLine("result: " + result);
                }
                else
                {
                    IO.writeLine("data value is too small to perform multiplication.");
                }
            }
            break;
        }
    }

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

    /* 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);
    }
}
