WMRMHeader.Sign

WMRMHeader.Sign

The Sign method adds a signature to the content header.

Syntax

  WMRMHeader
  .Sign(
  bstrPrivKey
  )

Parameters

bstrPrivKey

[in] String containing a private key.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns a number in the error object.

Remarks

The content packager uses a private key to sign the header. The license issuer uses a public key to verify the signature. The content packager can use the WMRMKeys.GenerateSigningKeys method to create both the private and public signing keys before delivering the latter to the license issuer.

Example Code

      Dim sKID, sCID, sSeed, sKey, sHeader
    Dim sPrivKey, sPubKey
    Dim HeaderObj
    Dim KeysObj
    Dim ProtectObj

' Create objects.

    Set HeaderObj = Server.CreateObject("Wmrmobjs.WMRMHeader")
    Set KeysObj = Server.CreateObject("Wmrmobjs.WMRMKeys")
    Set ProtectObj = Server.CreateObject("Wmrmobjs.WMRMProtect")




















' Require individualization version 2.2.
' Version numbers change. Verify that this number is up to date.

.IndividualizedVersion="2.2"
















HeaderObj.SetCheckSum(sKey)

' Replace XXX with the packaging server's private key. 

    = "XXX"

' Sign the header.



' Retrieve the string containing the header.

    sHeader = HeaderObj.Header

' Set the header string into the WMRMProtect object.

    ProtectObj.Header = sHeader

' Set the key into the WMRMProtect object.

    ProtectObj.Key = sKey

' Specify the name of the file to be protected.

    ProtectObj.InputFile = "c:\input_file.wmv"

' Generate a protected file.

    ProtectObj.ProtectFile("c:\output_file_1.wmv")

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

• WMRMHeader Object
• WMRMHeader.Verify
• WMRMKeys Object
• WMRMProtect Object

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