/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE190_Integer_Overflow__int_random_square_01.java
Label Definition File: CWE190_Integer_Overflow__int.label.xml
Template File: sources-sinks-01.tmpl.java
*/
/*
* @description
* CWE: 190 Integer Overflow
* BadSource: random Set data to a random value
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: square
*    GoodSink: Ensure there will not be an overflow before squaring data
*    BadSink : Square data, which can lead to overflow
* Flow Variant: 01 Baseline
*
* */






import java.security.SecureRandom;

public class CWE190_Integer_Overflow__int_random_square_01 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        int data;

        /* POTENTIAL FLAW: Set data to a random value */
        data = (new SecureRandom()).nextInt();

        /* POTENTIAL FLAW: if (data*data) > Integer.MAX_VALUE, this will overflow */
        int result = (int)(data * data);

        IO.writeLine("result: " + result);

    }

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

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

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

        /* POTENTIAL FLAW: if (data*data) > Integer.MAX_VALUE, this will overflow */
        int result = (int)(data * data);

        IO.writeLine("result: " + result);

    }

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

        /* POTENTIAL FLAW: Set data to a random value */
        data = (new SecureRandom()).nextInt();

        /* FIX: Add a check to prevent an overflow from occurring */
        /* NOTE: Math.abs of the minimum int or long will return that same value, so we must check for it */
        if ((data != Integer.MIN_VALUE) && (data != Long.MIN_VALUE) && (Math.abs(data) <= (long)Math.sqrt(Integer.MAX_VALUE)))
        {
            int result = (int)(data * data);
            IO.writeLine("result: " + result);
        }
        else
        {
            IO.writeLine("data value is too large to perform squaring.");
        }

    }

    /* 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);
    }
}

