ISCPSecureQuery3::MakeDecisionOnClearChannel method (mswmdm.h)

Article
10/13/2021

The MakeDecisionOnClearChannel method determines whether access to the content is allowed on a clear channel. If access is allowed, this method returns the interface used to access the content.

Syntax

HRESULT MakeDecisionOnClearChannel(
  [in]      UINT                fuFlags,
  [in]      BYTE                *pData,
  [in]      DWORD               dwSize,
  [in]      DWORD               dwAppSec,
  [in]      BYTE                *pbSPSessionKey,
  [in]      DWORD               dwSessionKeyLen,
  [in]      IMDSPStorageGlobals *pStorageGlobals,
  [in]      IWMDMProgress3      *pProgressCallback,
  [in]      BYTE                *pAppCertApp,
  [in]      DWORD               dwAppCertAppLen,
  [in]      BYTE                *pAppCertSP,
  [in]      DWORD               dwAppCertSPLen,
  [in, out] LPWSTR              *pszRevocationURL,
  [in, out] DWORD               *pdwRevocationURLLen,
  [out]     DWORD               *pdwRevocationBitFlag,
  [in, out] ULONGLONG           *pqwFileSize,
  [in]      IUnknown            *pUnknown,
  [out]     ISCPSecureExchange  **ppExchange
);

Parameters

[in] fuFlags

Flags describing the data offered to the content provider for making decisions. The following flags can be present.

Flag	Description
WMDM_SCP_DECIDE_DATA	The pData parameter points to data to be examined.
WMDM_MODE_TRANSFER_PROTECTED	The output object data from the ISCPSecureExchange interface must be protected. If Windows Media Device Manager sets neither or both mode flags, digital rights management (DRM) decides whether the output object data from the ISCPSecureExchange interface must be protected or unprotected.
WMDM_MODE_TRANSFER_UNPROTECTED	The output object data from the ISCPSecureExchange interface must be unprotected. If Windows Media Device Manager sets neither or both mode flags, digital rights management (DRM) decides whether the output object data from the ISCPSecureExchange interface must be protected or unprotected.

[in] pData

Pointer to a data object containing the data to be examined.

[in] dwSize

DWORD that contains the length, in bytes, of the data to be examined.

[in] dwAppSec

DWORD that indicates the current level of security of Windows Media Device Manager. This is the smaller of the current security levels of the application and the target service provider.

[in] pbSPSessionKey

Pointer to an array of bytes containing the session key for securing communication with the service provider to which pStgGlobals points.

[in] dwSessionKeyLen

Length of the byte array to which pbSPSessionKey points.

[in] pStorageGlobals

Pointer to the IWMDMStorageGlobals interface on the root storage of the media or device to or from which the file is being transferred.

[in] pProgressCallback

Pointer to a progress callback object.

[in] pAppCertApp

Pointer to an application certificate of the application object.

[in] dwAppCertAppLen

DWORD containing the length, in bytes, of the application certificate.

[in] pAppCertSP

Pointer to the application certificate of the service provider object.

[in] dwAppCertSPLen

DWORD containing the length, in bytes, of the application certificate.

[in, out] pszRevocationURL

Pointer to a buffer to hold the revocation URL.

[in, out] pdwRevocationURLLen

Pointer to a DWORD containing the size of the rpszRevocationURL buffer in bytes.

[out] pdwRevocationBitFlag

Pointer to a DWORD containing the revocation bit flag. The flag value will be either zero or one or more of the following flag names combined by using a bitwise OR.

Value	Description
WMDM_WMDM_REVOKED	Windows Media Device Manager itself has been revoked.
WMDM_APP_REVOKED	The application has been revoked and needs to be updated before any DRM-protected content can be transferred.
WMDM_SP_REVOKED	The service provider has been revoked and needs to be updated before any DRM-protected content can be transferred to it.
WMDM_SCP_REVOKED	The content provider has been revoked and needs to be updated before any DRM-protected content can be transferred.

[in, out] pqwFileSize

Pointer to a QWORD containing the file size. The content provider is responsible for updating this value or setting it to zero if the size of the destination file cannot be determined at this point.

[in] pUnknown

Pointer to an unknown interface from the application.

[out] ppExchange

Pointer to an exchange object that receives the exchange interface.

Return value

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

Return code	Description
WMDM_E_CALL_OUT_OF_SEQUENCE	This method was called out of sequence.
WMDM_E_MAC_CHECK_FAILED	The message authentication code is not valid.
WMDM_E_MOREDATA	Windows Media Device Manager must call this method again with another packet of data. The size of the packet is determined by the pdwMinDecisionData parameter in the ISCPSecureQuery::GetDataDemands method.
S_FALSE	The caller does not have the rights required to perform the requested transfer.
E_INVALIDARG	A parameter is invalid or is a NULL pointer.
E_FAIL	An unspecified error occurred.

Remarks

This method is identical to ISCPSecureQuery2::MakeDecision2 except that the parameters passed to this method are not encrypted. Consequently this method is more efficient.

Requirements

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