WMRMLicGen.IsClientExcluded
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WMRMLicGen.IsClientExcluded
You can use the IsClientExcluded property to determine whether the consumer's player that is requesting a license is based on an excluded DRM component (known by Microsoft to be damaged or corrupted).
Syntax
Boolean = WMRMLicGen .IsClientExcluded
Parameters
This property takes no parameters.
Return Values
This property does not return a value. If it succeeds, it sets S_OK in the error object. If the property fails, it returns a number in the error object.
| Return code | Description |
| 0x80048017 | The application exclusion information has not been set. |
Remarks
Use this property when receiving a license request so you can determine whether the requesting application is one that you want to exclude. If it is, you can refuse to issue a license. You might also display information to the consumer (for example, explaining that you will only issue licenses to certain players.
Example Code
' The client (player) posts a challenge to the license issuer. The
' challenge contains the packaged file's content header, actions requested
' by the client, and information about the client computer. To determine a
' client application's individualization version, perform the following
' steps.
' Declare variables and objects.
Dim sHeader, lResult, sLicRequest, indiVersion
Dim HeaderObj, ChallengeObj, LicGenObj
Dim strRevinfo, ContainsRevinfo, strClientCRLs
Dim bAppRevoked
' Create objects.
Set HeaderObj = Server.CreateObject("Wmrmobjs.WMRMHeader")
Set ChallengeObj = Server.CreateObject("Wmrmobjs.WMRMChallenge")
Set LicGenObj = Server.CreateObject("Wmrmobjs.WMRMLicGen")
' Retrieve the license request from the client computer.
sLicRequest = request.Form("challenge")
' Set the license request into the WMRMChallenge object.
ChallengeObj.Challenge = sLicRequest
' Retrieve the header from the challenge.
sHeader = ChallengeObj.Header
' Check for revocation information.
strRevinfo = ChallengeObj.RevInfo
ContainsRevinfo = ChallengeObj.RevInfoPresent
' Set the header into the WMRMHeader object.
HeaderObj.Header = sHeader
' Verify the header with the public key created by the content
' packager.
lResult = HeaderObj.Verify(sPubKey)
if (lResult = 0) then
' The header is corrupt.
end if
' Find out if the application uses an excluded DRM component.
bAppRevoked =LicGenObj.IsClientExcluded
if (bAppRevoked = True) then
' The player application is revoked.
end if
Requirements
Version: Windows Media Rights Manager 7 SDK or later
Reference: wmrmobjs 1.0 Type Library
Library: wmrmobjs.dll
Platform: Windows Server 2003
See Also
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