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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Aug 8, 1997



Application Security Testing: An Integral Part of DevOps

Incorrect API Listings

APILOD16.EXE and APILOD32.EXE access the file WIN32API.TXT to allow the programmer to paste the TYPE declarations needed to call the Win32 API.

The file WIN32API.TXT incorrectly allots a LONG field to each bit field the API requires. A misalignment in parameters results, rendering those TYPEs somewhere between dangerous and useless. This could be very difficult to debug.

WIN32API.TXT (incorrectly) shows:

        fCtsHold As Long                ' wrong!
        fDsrHold As Long                ' wrong!
        fRlsdHold As Long               ' wrong!
        fXoffHold As Long               ' wrong!
        fXoffSent As Long               ' wrong!
        fEof As Long                    ' wrong!
        fTxim As Long                   ' wrong!
        fReserved As Long               ' wrong!
        cbInQue As Long
        cbOutQue As Long
End Type

The WIN31API.TXT correctly says:

        bunch_Of_Bits As Long
        cbInQue As Long
        cbOutQue As Long
End Type

Andy Rosa
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