salted_sha512_password.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'digest/sha2'
require 'cfpropertylist'

def salted_sha512(password)
  seedint = rand(((2**31 - 1)-1+1))
  seedhex = ("%x" % seedint).upcase.rjust(8, '0')
  seedstring = seedint.to_a.pack("L")
  saltedpass = Digest::SHA512.hexdigest(seedstring + password)
  saltedhash = {'ShadowHashData' => (seedstring + saltedpass)}.to_a.flatten
  return saltedhash.to_a.flatten
end

password_hash = salted_sha512("password")
plist = CFPropertyList::List.new
plist.value = CFPropertyList::CFData.new(value=password_hash[1],format="DATA_RAW")
plist.save("password.plist", CFPropertyList::List::FORMAT_BINARY)




=begin

python version of this from createuser_lion hash generation script

def salted_sha512(password):
    seedInt = random.randrange(1, 2**31 - 1)
    seedHex = ("%x" % seedInt).upper().zfill(8)
    seedString = struct.pack(">L", seedInt)
    saltedPassword = hashlib.sha512(seedString + password).digest()
    return "%s%s" % (seedString, saltedPassword)
=end