/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE190_Integer_Overflow__long_rand_postinc_16.java
Label Definition File: CWE190_Integer_Overflow.label.xml
Template File: sources-sinks-16.tmpl.java
*/
/*
* @description
* CWE: 190 Integer Overflow
* BadSource: rand Set data to result of rand()
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: increment
*    GoodSink: Ensure there will not be an overflow before incrementing data
*    BadSink : Increment data, which can cause an overflow
* Flow Variant: 16 Control flow: while(true)
*
* */

package testcases.CWE190_Integer_Overflow.s06;
import testcasesupport.*;

import javax.servlet.http.*;

public class CWE190_Integer_Overflow__long_rand_postinc_16 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        long data;

        while (true)
        {
            /* POTENTIAL FLAW: Use a random value */
            data = (new java.security.SecureRandom()).nextLong();
            break;
        }

        while (true)
        {
            /* POTENTIAL FLAW: if data == Long.MAX_VALUE, this will overflow */
            data++;
            long result = (long)(data);
            IO.writeLine("result: " + result);
            break;
        }
    }

    /* goodG2B() - use goodsource and badsink */
    private void goodG2B() throws Throwable
    {
        long 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)
        {
            /* POTENTIAL FLAW: if data == Long.MAX_VALUE, this will overflow */
            data++;
            long result = (long)(data);
            IO.writeLine("result: " + result);
            break;
        }

    }

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

        while (true)
        {
            /* POTENTIAL FLAW: Use a random value */
            data = (new java.security.SecureRandom()).nextLong();
            break;
        }

        while (true)
        {
            /* FIX: Add a check to prevent an overflow from occurring */
            if (data < Long.MAX_VALUE)
            {
                data++;
                long result = (long)(data);
                IO.writeLine("result: " + result);
            }
            else
            {
                IO.writeLine("data value is too large to increment.");
            }
            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);
    }
}
