/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE400_Resource_Exhaustion__Environment_write_17.java
Label Definition File: CWE400_Resource_Exhaustion.label.xml
Template File: sources-sinks-17.tmpl.java
*/
/*
* @description
* CWE: 400 Resource Exhaustion
* BadSource: Environment Read count from an environment variable
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: write
*    GoodSink: Write to a file count number of times, but first validate count
*    BadSink : Write to a file count number of times
* Flow Variant: 17 Control flow: for loops
*
* */






import java.util.logging.Level;

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.BufferedWriter;
import java.io.IOException;


public class CWE400_Resource_Exhaustion__Environment_write_17 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        int count;

        /* We need to have one source outside of a for loop in order
         * to prevent the Java compiler from generating an error because
         * count is uninitialized
         */

        count = Integer.MIN_VALUE; /* Initialize count */

        /* get environment variable ADD */
        /* POTENTIAL FLAW: Read count from an environment variable */
        {
            String stringNumber = System.getenv("ADD");
            if (stringNumber != null) // avoid NPD incidental warnings
            {
                try
                {
                    count = Integer.parseInt(stringNumber.trim());
                }
                catch(NumberFormatException exceptNumberFormat)
                {
                    IO.logger.log(Level.WARNING, "Number format exception parsing count from string", exceptNumberFormat);
                }
            }
        }

        for (int j = 0; j < 1; j++)
        {
            File file = new File("badSink.txt");
            FileOutputStream streamFileOutput = new FileOutputStream(file);
            OutputStreamWriter writerOutputStream = new OutputStreamWriter(streamFileOutput, "UTF-8");
            BufferedWriter writerBuffered = new BufferedWriter(writerOutputStream);
            int i;
            /* POTENTIAL FLAW: Do not validate count before using it as the for loop variant to write to a file */
            for (i = 0; i < count; i++)
            {
                try
                {
                    writerBuffered.write("Hello");
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream writing", exceptIO);
                }
            }
            /* Close stream reading objects */
            try
            {
                if (writerBuffered != null)
                {
                    writerBuffered.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing BufferedWriter", exceptIO);
            }
            try
            {
                if (writerOutputStream != null)
                {
                    writerOutputStream.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing OutputStreamWriter", exceptIO);
            }
            try
            {
                if (streamFileOutput != null)
                {
                    streamFileOutput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing FileOutputStream", exceptIO);
            }
        }
    }

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

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

        for (int j = 0; j < 1; j++)
        {
            File file = new File("badSink.txt");
            FileOutputStream streamFileOutput = new FileOutputStream(file);
            OutputStreamWriter writerOutputStream = new OutputStreamWriter(streamFileOutput, "UTF-8");
            BufferedWriter writerBuffered = new BufferedWriter(writerOutputStream);
            int i;
            /* POTENTIAL FLAW: Do not validate count before using it as the for loop variant to write to a file */
            for (i = 0; i < count; i++)
            {
                try
                {
                    writerBuffered.write("Hello");
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream writing", exceptIO);
                }
            }
            /* Close stream reading objects */
            try
            {
                if (writerBuffered != null)
                {
                    writerBuffered.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing BufferedWriter", exceptIO);
            }
            try
            {
                if (writerOutputStream != null)
                {
                    writerOutputStream.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing OutputStreamWriter", exceptIO);
            }
            try
            {
                if (streamFileOutput != null)
                {
                    streamFileOutput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing FileOutputStream", exceptIO);
            }
        }
    }

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

        count = Integer.MIN_VALUE; /* Initialize count */

        /* get environment variable ADD */
        /* POTENTIAL FLAW: Read count from an environment variable */
        {
            String stringNumber = System.getenv("ADD");
            if (stringNumber != null) // avoid NPD incidental warnings
            {
                try
                {
                    count = Integer.parseInt(stringNumber.trim());
                }
                catch(NumberFormatException exceptNumberFormat)
                {
                    IO.logger.log(Level.WARNING, "Number format exception parsing count from string", exceptNumberFormat);
                }
            }
        }

        for (int k = 0; k < 1; k++)
        {
            /* FIX: Validate count before using it as the for loop variant to write to a file */
            if (count > 0 && count <= 20)
            {
                File file = new File("goodSink.txt");
                FileOutputStream streamFileOutput = new FileOutputStream(file);
                OutputStreamWriter writerOutputStream = new OutputStreamWriter(streamFileOutput, "UTF-8");
                BufferedWriter writerBuffered = new BufferedWriter(writerOutputStream);
                int i;
                for (i = 0; i < count; i++)
                {
                    try
                    {
                        writerBuffered.write("Hello");
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error with stream writing", exceptIO);
                    }
                }
                /* Close stream reading objects */
                try
                {
                    if (writerBuffered != null)
                    {
                        writerBuffered.close();
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error closing BufferedWriter", exceptIO);
                }
                try
                {
                    if (writerOutputStream != null)
                    {
                        writerOutputStream.close();
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error closing OutputStreamWriter", exceptIO);
                }
                try
                {
                    if (streamFileOutput != null)
                    {
                        streamFileOutput.close();
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error closing FileOutputStream", exceptIO);
                }
            }
        }
    }

    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);
    }
}
