• Article

Windows Media Rights Manager SDK banner art

WMRMHeader.KeyID

The KeyID property specifies and retrieves the ID of the encryption key.

Syntax

WMRMHeader.KeyID=String
String= WMRMHeader.KeyID

Parameters

This property takes no parameters.

Return Values

If the property succeeds, it returns a String containing the ID. If it fails, it returns a number in the error object.

Return code Description
0x80004005 An unspecified error occurred.
0x80070057 The specified parameter is not valid.

Remarks

Both the key ID and the license key seed are required by the Windows Media Rights Manager SDK to generate a key.

Example Code

' Declare variables and objects.

    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")

' Create the key ID and content ID, and key. Set the key ID and ' the content ID into the header. Store the key in a secure manner.    sKID = KeysObj.GenerateKeyID()    sCID = KeysObj.GenerateKeyID()    KeysObj.KeyID = sKID    HeaderObj.KeyID = sKID    HeaderObj.ContentID = sCID'  Replace XXX with the license key seed.    sSeed = "XXX"    KeysObj.Seed = sSeed' Generate the key.    sKey = KeysObj.GenerateKey()

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

    HeaderObj.IndividualizedVersion="2.2"

' Specify the URL of the license issuer, and set it into' the header.    sURL = "https://www.LicenseIssuer.com/getlicense.asp"    HeaderObj.LicenseAcqURL = sURL' Set name-value pairs describing the content into the header.    HeaderObj.Attribute("Author") = "name of the author"    HeaderObj.Attribute("ContentDistributor") = "name of the distributor"    HeaderObj.Attribute("ContentType") = "type of content distributed"    HeaderObj.Attribute("Title") = "title of the content"' Set the checksum.HeaderObj.SetCheckSum(sKey)

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

    sPrivKey = "XXX"

' Sign the header.

    HeaderObj.Sign(sPrivKey)

' 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