WMRMChallenge.ClientVersion

The ClientVersion property retrieves the security version of the DRM component on the client.

Syntax

String = WMRMChallenge.ClientVersion

Parameters

This property takes no parameters.

Return Values

If the method succeeds, it returns a String containing the DRM component version. If it fails, it returns a number in the error object.

Remarks

The license issuer can determine which version of license to issue based on this value. For example, a client based on a version 10 DRM component supports Windows Media Rights Manager 10 licenses.

This property is read-only.

Example Code

' Assume that the content packager has sent encrypted content and 
' a header to a consumer. The consumer's computer determines that 
' a license is needed and posts a challenge to the license issuer.
' The challenge contains the header sent by the content packager,
' actions requested by the client, and information about the client
' computer.
'
' For more information about the header, see the WMRMHeader object.


' Declare variables and objects.
    Dim sHeader, sClientInfo, sPubKey, lResult, dwActionCnt
    Dim sLicRequest, lIndex, sVerClient, sVerSecurity, sAppSecurity
    Dim sAction()
    Dim HeaderObj
    Dim ChallengeObj
    Dim DRMVersion

' Create objects.
    Set HeaderObj = Server.CreateObject("Wmrmobjs.WMRMHeader")
    Set ChallengeObj = Server.CreateObject("Wmrmobjs.WMRMChallenge")
  
' 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

' 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 has been corrupted.
    end if

' Retrieve the DRM client version from the client.
    DRMVersion = ChallengeObj.ClientVersion

Requirements

Version: Windows Media Rights Manager 10 SDK

Reference: wmrmobjs 1.0 Type Library

Library: wmrmobjs.dll

Platform: Windows Server 2003

See Also

• WMRMChallenge Object