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ISCPSecureExchange::ObjectData method (mswmdm.h)

  • Article

The ObjectData method transfers a block of object data back to Windows Media Device Manager.

Syntax

HRESULT ObjectData(
  [out]     BYTE     *pData,
  [in, out] DWORD    *pdwSize,
  [in, out] BYTE [8] abMac
);

Parameters

[out] pData

Pointer to a buffer to receive data. This parameter is included in the output message authentication code and is encrypted.

[in, out] pdwSize

Pointer to a DWORD containing the transfer size. This parameter must be included in both the input and output message authentication codes.

[in, out] abMac

Array of eight bytes containing the message authentication code for the parameter data of this method. (WMDM_MAC_LENGTH is defined as 8.)

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Return code Description
WMDM_E_MAC_CHECK_FAILED
 The message authentication code is not valid.
WMDM_E_NORIGHTS
 The caller does not have the rights required to perform the requested operation.
S_FALSE
 The method failed. Terminate interaction with the secure content provider.
E_INVALIDARG
 A parameter is an invalid or NULL pointer.
E_FAIL
 An unspecified error occurred.

Remarks

To transfer data, Windows Media Device Manager calls the TransferContainerData method to obtain the container data. ObjectData is then called to transfer blocks of object data from the secure content provider to Windows Media Device Manager. If S_OK is returned with pdwSize set to zero, Windows Media Device Manager will request no further data.

Requirements

Requirement Value
Target Platform Windows
Header mswmdm.h
Library Mssachlp.lib

See also

ISCPSecureExchange Interface