/* goodG2B() - use goodsource and badsink */ private static void GoodG2B() { ulong data = CWE191_Integer_Underflow__UInt64_console_ReadLine_multiply_61b.GoodG2BSource(); if (data < 0) /* ensure we won't have an overflow */ { /* POTENTIAL FLAW: if (data * 2) < ulong.MinValue, this will underflow */ ulong result = (ulong)(data * 2); IO.WriteLine("result: " + result); } }
/* goodB2G() - use badsource and goodsink */ private static void GoodB2G() { ulong data = CWE191_Integer_Underflow__UInt64_console_ReadLine_multiply_61b.GoodB2GSource(); if (data < 0) /* ensure we won't have an overflow */ { /* FIX: Add a check to prevent an underflow from occurring */ if (data > (ulong.MinValue / 2)) { ulong result = (ulong)(data * 2); IO.WriteLine("result: " + result); } else { IO.WriteLine("data value is too small to perform multiplication."); } } }