Rails 3.1 modules

I think in earlier versions, I put modules into RAILS_ROOT/lib

I have a module that I extracted from activesambaldap to create a Windows Hash Password that I will need to use on occasion that looks something like this...

require 'openssl'

module Samba
  module Encrypt
    module_function
    def lm_hash(password, encoding=nil)
      dos_password = Private.convert_encoding("ISO-8859-1",
                                              encoding || "UTF-8",
                                              password.upcase)
      if dos_password.size > 14
        warn("password is truncated to 14 characters")
        dos_password = dos_password[0, 14]
      end
      Private.encrypt_14characters(dos_password).unpack("C*").collect do |char|
        "%02X" % char
      end.join
    end
...

Can I just drop it in 'RAILS_ROOT' lib and require it when I need it?