用VBS实现PHP的md5_file函数代码

Function md5_file(filename, raw_output)
Dim HashedData, Utility, Stream
Set HashedData = CreateObject("CAPICOM.HashedData")
Set Utility = CreateObject("CAPICOM.Utilities")
Set Stream = CreateObject("ADODB.Stream")
HashedData.Algorithm = 3
Stream.Type = 1
Stream.Open
Stream.LoadFromFile filename
Do Until Stream.EOS
HashedData.Hash Stream.Read(1024)
Loop
If raw_output Then
md5_file = Utility.HexToBinary(HashedData.Value)
Else
md5_file = HashedData.Value
End If
End Function