ID3D11VideoContext::StartSessionKeyRefresh method
Gets a random number that can be used to refresh the session key.
Syntax
HRESULT StartSessionKeyRefresh( [in] ID3D11CryptoSession *pCryptoSession, [in] UINT RandomNumberSize, [out] void *pRandomNumber );
Parameters
- pCryptoSession [in]
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A pointer to the ID3D11CryptoSession interface.
- RandomNumberSize [in]
-
The size of the pRandomNumber array, in bytes. The size should match the size of the session key.
- pRandomNumber [out]
-
A pointer to a byte array that receives a random number.
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 ID3D11VideoContext::FinishSessionKeyRefresh.
To query whether the driver supports this method, call ID3D11VideoDevice::GetContentProtectionCaps and check for the D3D11_CONTENT_PROTECTION_CAPS_FRESHEN_SESSION_KEY capabilities flag.
Requirements
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Minimum supported client |
Windows 8 [desktop apps | Windows Store apps] |
|---|---|
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Minimum supported server |
Windows Server 2012 [desktop apps | Windows Store apps] |
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Minimum supported phone |
Windows Phone 8 |
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Header |
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See also