On Feb 8, 2021, at 8:23 PM, Doug Campbell <[email protected]> wrote:
>
> In my python 2 script, I am trying to connect to the VeraCrypt device driver
> to get some information on my mounted volumes.
There are a lot of things to go wrong here. You may be in for a long slog.
Your ctypes definition does look fundamentally correct.
> This is what I have so far. I tried a bunch of different ideas on how to
> construct the input buffer for the DeviceIoControl function call but I keep
> getting the following response.
>
> Traceback (most recent call last):
> File "test.py", line 188, in <module>
>
> info=win32file.DeviceIoControl(hDisk,VC_IOCTL_GET_VOLUME_PROPERTIES,b'x05x00x00x00'
> + (b'x00' * 702),65536)
> pywintypes.error: (87, 'DeviceIoControl', 'The parameter is incorrect.')
The last parameter is the size of the output buffer, and that does get passed
to the driver. It should be sizeof(VOLUME_PROPERTIES_STRUCT) which is, I
believe, 1280.
> #info=win32file.DeviceIoControl(hDisk,VC_IOCTL_GET_VOLUME_PROPERTIES,struct.pack('ii520sQiiiiLLLLLQQiii66sL64sL',prop),17424)
Last should be 1280, I think.
> info=win32file.DeviceIoControl(hDisk,VC_IOCTL_GET_VOLUME_PROPERTIES,b'0x00' +
> b'x05x00x00x00' + b'x00' * 702),65536)
The first b’0x00’ is wrong; the first byte of the struct needs to be 5.
—
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.
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