| UID | title | description | old-location | tech.root | ms.date | keywords | ms.keywords | req.header | req.include-header | req.target-type | req.target-min-winverclnt | req.target-min-winversvr | req.kmdf-ver | req.umdf-ver | req.ddi-compliance | req.unicode-ansi | req.idl | req.max-support | req.namespace | req.assembly | req.type-library | req.lib | req.dll | req.irql | targetos | req.typenames | f1_keywords | topic_type | api_type | api_location | api_name | ||||||||
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NC:d3dumddi.PFND3DDDI_STARTSESSIONKEYREFRESH |
PFND3DDDI_STARTSESSIONKEYREFRESH (d3dumddi.h) |
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. |
display\startsessionkeyrefresh.htm |
display |
05/10/2018 |
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PFND3DDDI_STARTSESSIONKEYREFRESH, PFND3DDDI_STARTSESSIONKEYREFRESH callback, StartSessionKeyRefresh, StartSessionKeyRefresh callback function [Display Devices], UserModeDisplayDriver_Functions_c68a1081-f350-4439-8c1c-91d9c54469bd.xml, d3dumddi/StartSessionKeyRefresh, display.startsessionkeyrefresh |
d3dumddi.h |
D3dumddi.h |
Desktop |
StartSessionKeyRefresh is supported beginning with the Windows 7 operating system. |
Windows |
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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.
A handle to the display device (graphics context).
pData [in, out]
A pointer to a D3DDDIARG_STARTSESSIONKEYREFRESH structure that contains information about the random number.
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. |
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.