/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE400_Resource_Exhaustion__Environment_for_loop_21.java
Label Definition File: CWE400_Resource_Exhaustion.label.xml
Template File: sources-sinks-21.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: for_loop
 *    GoodSink: Validate count before using it as the loop variant in a for loop
 *    BadSink : Use count as the loop variant in a for loop
 * Flow Variant: 21 Control flow: Flow controlled by value of a private variable. All functions contained in one file.
 *
 * */






import java.util.logging.Level;

public class CWE400_Resource_Exhaustion__Environment_for_loop_21 extends AbstractTestCase
{
    /* The variable below is used to drive control flow in the sink function */
    private boolean badPrivate = false;

    public void bad() 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);
                }
            }
        }

        badPrivate = true;
        badSink(count );
    }

    private void badSink(int count ) throws Throwable
    {
        if (badPrivate)
        {
            int i = 0;
            /* POTENTIAL FLAW: For loop using count as the loop variant and no validation */
            for (i = 0; i < count; i++)
            {
                IO.writeLine("Hello");
            }
        }
    }

    /* The variables below are used to drive control flow in the sink functions. */
    private boolean goodB2G1Private = false;
    private boolean goodB2G2Private = false;
    private boolean goodG2BPrivate = false;

    public void good() throws Throwable
    {
        goodB2G1();
        goodB2G2();
        goodG2B();
    }

    /* goodB2G1() - use BadSource and GoodSink by setting the variable to false instead of true */
    private void goodB2G1() 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);
                }
            }
        }

        goodB2G1Private = false;
        goodB2G1Sink(count );
    }

    private void goodB2G1Sink(int count ) throws Throwable
    {
        if (goodB2G1Private)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
            IO.writeLine("Benign, fixed string");
        }
        else
        {

            int i = 0;

            /* FIX: Validate count before using it as the for loop variant */
            if (count > 0 && count <= 20)
            {
                for (i = 0; i < count; i++)
                {
                    IO.writeLine("Hello");
                }
            }

        }
    }

    /* goodB2G2() - use BadSource and GoodSink by reversing the blocks in the if in the sink function */
    private void goodB2G2() 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);
                }
            }
        }

        goodB2G2Private = true;
        goodB2G2Sink(count );
    }

    private void goodB2G2Sink(int count ) throws Throwable
    {
        if (goodB2G2Private)
        {
            int i = 0;
            /* FIX: Validate count before using it as the for loop variant */
            if (count > 0 && count <= 20)
            {
                for (i = 0; i < count; i++)
                {
                    IO.writeLine("Hello");
                }
            }
        }
    }

    /* 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;

        goodG2BPrivate = true;
        goodG2BSink(count );
    }

    private void goodG2BSink(int count ) throws Throwable
    {
        if (goodG2BPrivate)
        {
            int i = 0;
            /* POTENTIAL FLAW: For loop using count as the loop variant and no validation */
            for (i = 0; i < count; i++)
            {
                IO.writeLine("Hello");
            }
        }
    }

    /* 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);
    }
}
