IDirect3DCryptoSession9::StartSessionKeyRefresh method (d3d9.h)
Gets a random number that can be used to refresh the session key.
Syntax
HRESULT StartSessionKeyRefresh(
VOID *pRandomNumber,
UINT RandomNumberSize
);
Parameters
pRandomNumber
A pointer to a byte array that receives a random number.
RandomNumberSize
The size of the pRandomNumber array, in bytes. The size should match the size of the session key.
Return value
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Remarks
To generate a new session key, perform a bitwise XOR between the previous session key and the random number. The new session key does not take affect until the application calls IDirect3DCryptoSession9::FinishSessionKeyRefresh.
If the driver supports this method, the driver sets the D3DCPCAPS_FRESHENSESSIONKEY capabilities flag in the IDirect3DDevice9Video::GetContentProtectionCaps method.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | d3d9.h |