module Net::SSH::Authentication::Pageant::Win

def self.get_token_information(token_handle,
                               token_information_class)
  # Hold the size of the information to be returned
  preturn_length = malloc_ptr(Win::SIZEOF_DWORD)
  # Going to throw an INSUFFICIENT_BUFFER_ERROR, but that is ok
  # here. This is retrieving the size of the information to be
  # returned.
  Win.GetTokenInformation(token_handle,
                          token_information_class,
                          Win::NULL, 0, preturn_length)
  ptoken_information = malloc_ptr(preturn_length.to_s(Win::SIZEOF_DWORD).unpack('L')[0])
  # This call is going to write the requested information to
  # the memory location referenced by token_information.
  raise_error_if_zero(
    Win.GetTokenInformation(token_handle,
                            token_information_class,
                            ptoken_information,
                            ptoken_information.size,
                            preturn_length))
  return TOKEN_USER.new(ptoken_information)
end