IWMDRMNetTransmitter::GetLeafLicenseResponse method

Article
06/20/2023

[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetLeafLicenseResponse method generates a leaf license response message.

Syntax

HRESULT GetLeafLicenseResponse(
  [in]  BSTR            bstrKID,
  [in]  WMDRMNET_POLICY *pPolicy,
  [out] IWMDRMEncrypt   **ppIWMDRMEncrypt,
  [out] BYTE            **ppbLicenseResponse,
  [out] DWORD           *pcbLicenseResponse
);

Parameters

bstrKID [in]: Base64-encoded key identifier to be used for the new leaf license. The key identifier should be a randomly generated GUID value.
pPolicy [in]: Pointer to the WMDRMNET_POLICY structure that defines the policy to use for the leaf license.
ppIWMDRMEncrypt [out]: Address of a variable that receives a pointer to the IWMDRMEncrypt interface that can be used to encrypt data for the new leaf license.
ppbLicenseResponse [out]: Address of a variable that receives the address of the generated license response. When finished with this data, you must release the memory by calling CoTaskMemFree.
pcbLicenseResponse [out]: Address of a variable that receives the size of the license response, in bytes.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
NS_E_DRM_RIV_TOO_SMALL	An updated content revocation list is needed.
S_OK	The method succeeded.

Remarks

None.

Requirements

Requirement	Value
Header	Wmdrmsdk.h

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