WMRMHeader.Header

The Header property specifies and retrieves the string that makes up the content header.

Syntax

WMRMHeader.Header = String
String = WMRMHeader.Header

Parameters

This property takes no parameters.

Return Values

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

Remarks

You can use the Header property to verify that you have correctly specified the data section before you pass the header object to the WMRMProtect object. A content header consists of the following information.

• The key ID used to create a key.
• An optional content ID to uniquely identify the encrypted content.
• Optional attributes that identify the content.
• A URL identifying the Internet address of the license issuer.
• The minimum application security version number required to play content.

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 version number.

    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

• WMRMHeader Object
• WMRMKeys Object
• WMRMProtect Object