PFND3DDDI_STARTSESSIONKEYREFRESH callback function

The StartSessionKeyRefresh function returns a random number that the driver's FinishSessionKeyRefresh function subsequently uses to perform an exclusive OR operation (XOR) with the session key.

Syntax

PFND3DDDI_STARTSESSIONKEYREFRESH Pfnd3dddiStartsessionkeyrefresh;

HRESULT Pfnd3dddiStartsessionkeyrefresh(
  HANDLE hDevice,
  CONST D3DDDIARG_STARTSESSIONKEYREFRESH *
)
{...}

Parameters

hDevice

A handle to the display device (graphics context).

*

Return Value

StartSessionKeyRefresh returns one of the following values:

Return code Description
S_OK
The random number is successfully returned.
D3DDDIERR_NOTAVAILABLE
The driver does not support the StartSessionKeyRefresh function.

Remarks

The hardware and driver can optionally support StartSessionKeyRefresh for all crypto types.

When the Direct3D runtime calls the driver's StartSessionKeyRefresh function, the driver generates and saves a random number and returns the random number in the buffer that the pRandomNumber member of the D3DDDIARG_STARTSESSIONKEYREFRESH structure points to.

When the runtime subsequently calls the driver's FinishSessionKeyRefresh function, the driver performs an XOR operation of the random number with the session key.

Requirements

   
Windows version StartSessionKeyRefresh is supported beginning with the Windows 7 operating system.
Target Platform Desktop
Header d3dumddi.h (include D3dumddi.h)

See Also

D3DDDIARG_STARTSESSIONKEYREFRESH

FinishSessionKeyRefresh