bytepermutation.vhd

来自「VHDL实现128bitAES加密算法 LOW AREA节约成本的实现 DATA」· VHDL 代码 · 共 38 行

-------------------------------------------------------------------------------
-- Title      : A compact 8bit AES encryption core
-------------------------------------------------------------------------------
-- File       : bytepermutation.vhd
-- Author     : Timo Alho  <[e-mail]>
-- Date       : 27.2.2006
-------------------------------------------------------------------------------
-- Description: BytePermutation entity
-------------------------------------------------------------------------------
-- Disclaimer: The AES encryption core provided here is distributed AS
-- IS without any warranty of any kind either expressed or implied,
-- including, without limitation, warranties of merchantability,
-- fitness for a particular purpose or non infringement of
-- intellectual property rights.
-------------------------------------------------------------------------------

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

entity bytepermutation is

  port(
    clk : in std_logic;

    -- data input and output
    data_in  : in  std_logic_vector (7 downto 0);
    data_out : out std_logic_vector (7 downto 0);

    -- control signals
    inverse_in : in std_logic;                     -- '1' = inverse operation
    seq_in     : in std_logic_vector(3 downto 0);  -- sequence counter
    shift_in   : in std_logic;
    load_in    : in std_logic                      -- "external" load
    );

end bytepermutation;