unpack

# File ext/dl/win32/lib/win32/sspi.rb, line 121
                        def unpack
                                if ! @unpacked && @sec_buffer && @struct
                                        @bufferSize, @type = @sec_buffer.unpack("LL")
                                        @buffer = @sec_buffer.unpack("LLP#{@bufferSize}")[2]
                                        @struct = nil
                                        @sec_buffer = nil
                                        @unpacked = true
                                end
                        end