Get service SID from service name

gistfile1.fs

open System.Security.Cryptography
open System.Security.Principal
open System.Text
open System

// 1st arg (index [0]) is this script
let name = fsi.CommandLineArgs.[1]
let hash = new SHA1CryptoServiceProvider()
let tail = name.ToUpper()
              |> Encoding.Unicode.GetBytes
              |> (fun x -> hash.ComputeHash(x))
              
let head = [|1uy; 6uy; 0uy; 0uy; 0uy; 0uy; 0uy; 5uy; 80uy; 0uy; 0uy; 0uy |]
let binary = Array.append head tail

let sid = new SecurityIdentifier(binary, 0)
Console.WriteLine(sid.ToString())