用VBS实现PHP的sha1_file函数

Function sha1_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 = 0
    Stream.Type = 1
    Stream.Open
    Stream.LoadFromFile filename
    Do Until Stream.EOS
        HashedData.Hash Stream.Read(1024)
    Loop
    If raw_output Then
        sha1_file = Utility.HexToBinary(HashedData.Value)
    Else
        sha1_file = HashedData.Value
    End If
End Function

参考链接：HashedData Object