public override void Bad() { double data; data = double.MinValue; /* Initialize data */ /* read input from WebClient */ { WebClient client = new WebClient(); StreamReader sr = null; try { sr = new StreamReader(client.OpenRead("http://www.example.org/")); /* FLAW: Read data from a web server with WebClient */ /* This will be reading the first "line" of the response body, * which could be very long if there are no newlines in the HTML */ string stringNumber = sr.ReadLine(); if (stringNumber != null) // avoid NPD incidental warnings { try { data = double.Parse(stringNumber.Trim()); } catch (FormatException exceptNumberFormat) { IO.Logger.Log(NLog.LogLevel.Warn, exceptNumberFormat, "Number format exception parsing data from string"); } } } catch (IOException exceptIO) { IO.Logger.Log(NLog.LogLevel.Warn, exceptIO, "Error with stream reading"); } finally { /* clean up stream reading objects */ try { if (sr != null) { sr.Close(); } } catch (IOException exceptIO) { IO.Logger.Log(NLog.LogLevel.Warn, exceptIO, "Error closing StreamReader"); } } } LinkedList <double> dataLinkedList = new LinkedList <double>(); dataLinkedList.AddLast(data); dataLinkedList.AddLast(data); dataLinkedList.AddLast(data); CWE197_Numeric_Truncation_Error__double_NetClient_to_byte_73b.BadSink(dataLinkedList); }
/* goodG2B() - use goodsource and badsink */ private static void GoodG2B() { double data; /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */ data = 2; LinkedList <double> dataLinkedList = new LinkedList <double>(); dataLinkedList.AddLast(data); dataLinkedList.AddLast(data); dataLinkedList.AddLast(data); CWE197_Numeric_Truncation_Error__double_NetClient_to_byte_73b.GoodG2BSink(dataLinkedList); }