subbytes_lut.vhd

VHDL实现128bitAES加密算法 LOW AREA节约成本的实现 DATA FLOW为8bits

-------------------------------------------------------------------------------
-- Title      : A compact 8bit AES encryption core
-------------------------------------------------------------------------------
-- File       : subbytes_lut.vhd
-- Author     : Timo Alho  <[e-mail]>
-- Date       : 27.2.2006
-------------------------------------------------------------------------------
-- Description: SubBytes (S-box) architecture. Look-up table based.
-------------------------------------------------------------------------------
-- 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.
-------------------------------------------------------------------------------

package sbox_lut is

  type lut_t is array (0 to 255) of integer;
  
  constant sbox_forward_lut : lut_t := (
    16#63#, 16#7C#, 16#77#, 16#7B#, 16#F2#, 16#6B#, 16#6F#, 16#C5#,
    16#30#, 16#01#, 16#67#, 16#2B#, 16#FE#, 16#D7#, 16#AB#, 16#76#,
    16#CA#, 16#82#, 16#C9#, 16#7D#, 16#FA#, 16#59#, 16#47#, 16#F0#,
    16#AD#, 16#D4#, 16#A2#, 16#AF#, 16#9C#, 16#A4#, 16#72#, 16#C0#,
    16#B7#, 16#FD#, 16#93#, 16#26#, 16#36#, 16#3F#, 16#F7#, 16#CC#,
    16#34#, 16#A5#, 16#E5#, 16#F1#, 16#71#, 16#D8#, 16#31#, 16#15#,
    16#04#, 16#C7#, 16#23#, 16#C3#, 16#18#, 16#96#, 16#05#, 16#9A#,
    16#07#, 16#12#, 16#80#, 16#E2#, 16#EB#, 16#27#, 16#B2#, 16#75#,
    16#09#, 16#83#, 16#2C#, 16#1A#, 16#1B#, 16#6E#, 16#5A#, 16#A0#,
    16#52#, 16#3B#, 16#D6#, 16#B3#, 16#29#, 16#E3#, 16#2F#, 16#84#,
    16#53#, 16#D1#, 16#00#, 16#ED#, 16#20#, 16#FC#, 16#B1#, 16#5B#,
    16#6A#, 16#CB#, 16#BE#, 16#39#, 16#4A#, 16#4C#, 16#58#, 16#CF#,
    16#D0#, 16#EF#, 16#AA#, 16#FB#, 16#43#, 16#4D#, 16#33#, 16#85#,
    16#45#, 16#F9#, 16#02#, 16#7F#, 16#50#, 16#3C#, 16#9F#, 16#A8#,
    16#51#, 16#A3#, 16#40#, 16#8F#, 16#92#, 16#9D#, 16#38#, 16#F5#,
    16#BC#, 16#B6#, 16#DA#, 16#21#, 16#10#, 16#FF#, 16#F3#, 16#D2#,
    16#CD#, 16#0C#, 16#13#, 16#EC#, 16#5F#, 16#97#, 16#44#, 16#17#,
    16#C4#, 16#A7#, 16#7E#, 16#3D#, 16#64#, 16#5D#, 16#19#, 16#73#,
    16#60#, 16#81#, 16#4F#, 16#DC#, 16#22#, 16#2A#, 16#90#, 16#88#,
    16#46#, 16#EE#, 16#B8#, 16#14#, 16#DE#, 16#5E#, 16#0B#, 16#DB#,
    16#E0#, 16#32#, 16#3A#, 16#0A#, 16#49#, 16#06#, 16#24#, 16#5C#,
    16#C2#, 16#D3#, 16#AC#, 16#62#, 16#91#, 16#95#, 16#E4#, 16#79#,
    16#E7#, 16#C8#, 16#37#, 16#6D#, 16#8D#, 16#D5#, 16#4E#, 16#A9#,
    16#6C#, 16#56#, 16#F4#, 16#EA#, 16#65#, 16#7A#, 16#AE#, 16#08#,
    16#BA#, 16#78#, 16#25#, 16#2E#, 16#1C#, 16#A6#, 16#B4#, 16#C6#,
    16#E8#, 16#DD#, 16#74#, 16#1F#, 16#4B#, 16#BD#, 16#8B#, 16#8A#,
    16#70#, 16#3E#, 16#B5#, 16#66#, 16#48#, 16#03#, 16#F6#, 16#0E#,
    16#61#, 16#35#, 16#57#, 16#B9#, 16#86#, 16#C1#, 16#1D#, 16#9E#,
    16#E1#, 16#F8#, 16#98#, 16#11#, 16#69#, 16#D9#, 16#8E#, 16#94#,
    16#9B#, 16#1E#, 16#87#, 16#E9#, 16#CE#, 16#55#, 16#28#, 16#DF#,
    16#8C#, 16#A1#, 16#89#, 16#0D#, 16#BF#, 16#E6#, 16#42#, 16#68#,
    16#41#, 16#99#, 16#2D#, 16#0F#, 16#B0#, 16#54#, 16#BB#, 16#16#);

  constant sbox_inverse_lut : lut_t := (
    16#52#, 16#09#, 16#6a#, 16#d5#, 16#30#, 16#36#, 16#a5#, 16#38#,
    16#bf#, 16#40#, 16#a3#, 16#9e#, 16#81#, 16#f3#, 16#d7#, 16#fb#,
    16#7c#, 16#e3#, 16#39#, 16#82#, 16#9b#, 16#2f#, 16#ff#, 16#87#,
    16#34#, 16#8e#, 16#43#, 16#44#, 16#c4#, 16#de#, 16#e9#, 16#cb#,
    16#54#, 16#7b#, 16#94#, 16#32#, 16#a6#, 16#c2#, 16#23#, 16#3d#,
    16#ee#, 16#4c#, 16#95#, 16#0b#, 16#42#, 16#fa#, 16#c3#, 16#4e#,
    16#08#, 16#2e#, 16#a1#, 16#66#, 16#28#, 16#d9#, 16#24#, 16#b2#,
    16#76#, 16#5b#, 16#a2#, 16#49#, 16#6d#, 16#8b#, 16#d1#, 16#25#,
    16#72#, 16#f8#, 16#f6#, 16#64#, 16#86#, 16#68#, 16#98#, 16#16#,
    16#d4#, 16#a4#, 16#5c#, 16#cc#, 16#5d#, 16#65#, 16#b6#, 16#92#,
    16#6c#, 16#70#, 16#48#, 16#50#, 16#fd#, 16#ed#, 16#b9#, 16#da#,
    16#5e#, 16#15#, 16#46#, 16#57#, 16#a7#, 16#8d#, 16#9d#, 16#84#,
    16#90#, 16#d8#, 16#ab#, 16#00#, 16#8c#, 16#bc#, 16#d3#, 16#0a#,
    16#f7#, 16#e4#, 16#58#, 16#05#, 16#b8#, 16#b3#, 16#45#, 16#06#,
    16#d0#, 16#2c#, 16#1e#, 16#8f#, 16#ca#, 16#3f#, 16#0f#, 16#02#,
    16#c1#, 16#af#, 16#bd#, 16#03#, 16#01#, 16#13#, 16#8a#, 16#6b#,
    16#3a#, 16#91#, 16#11#, 16#41#, 16#4f#, 16#67#, 16#dc#, 16#ea#,
    16#97#, 16#f2#, 16#cf#, 16#ce#, 16#f0#, 16#b4#, 16#e6#, 16#73#,
    16#96#, 16#ac#, 16#74#, 16#22#, 16#e7#, 16#ad#, 16#35#, 16#85#,
    16#e2#, 16#f9#, 16#37#, 16#e8#, 16#1c#, 16#75#, 16#df#, 16#6e#,
    16#47#, 16#f1#, 16#1a#, 16#71#, 16#1d#, 16#29#, 16#c5#, 16#89#,
    16#6f#, 16#b7#, 16#62#, 16#0e#, 16#aa#, 16#18#, 16#be#, 16#1b#,
    16#fc#, 16#56#, 16#3e#, 16#4b#, 16#c6#, 16#d2#, 16#79#, 16#20#,
    16#9a#, 16#db#, 16#c0#, 16#fe#, 16#78#, 16#cd#, 16#5a#, 16#f4#,
    16#1f#, 16#dd#, 16#a8#, 16#33#, 16#88#, 16#07#, 16#c7#, 16#31#,
    16#b1#, 16#12#, 16#10#, 16#59#, 16#27#, 16#80#, 16#ec#, 16#5f#,
    16#60#, 16#51#, 16#7f#, 16#a9#, 16#19#, 16#b5#, 16#4a#, 16#0d#,
    16#2d#, 16#e5#, 16#7a#, 16#9f#, 16#93#, 16#c9#, 16#9c#, 16#ef#,
    16#a0#, 16#e0#, 16#3b#, 16#4d#, 16#ae#, 16#2a#, 16#f5#, 16#b0#,
    16#c8#, 16#eb#, 16#bb#, 16#3c#, 16#83#, 16#53#, 16#99#, 16#61#,
    16#17#, 16#2b#, 16#04#, 16#7e#, 16#ba#, 16#77#, 16#d6#, 16#26#,
    16#e1#, 16#69#, 16#14#, 16#63#, 16#55#, 16#21#, 16#0c#, 16#7d#);

end sbox_lut;

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

architecture lut of subbytes is

  signal sbox_forward_out : integer;
  signal sbox_inverse_out : integer;
  
begin  -- architecture lut

  assert (pipeline_length_g = 0) report "Invalid pipeline length (generic)"
    severity failure;

  sbox_forward_out <= sbox_forward_lut(to_integer(unsigned(data_in)));

  sbox_inverse_out <= sbox_inverse_lut(to_integer(unsigned(data_in)));

  data_out <= std_logic_vector(to_unsigned(sbox_forward_out, 8))
              when inverse_in = '0' else
              std_logic_vector(to_unsigned(sbox_inverse_out, 8));

end architecture lut;

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

architecture lut of fwd_subbytes is

  signal sbox_forward_out : integer;
  
begin  -- architecture lut

  assert (pipeline_length_g = 0) report "Invalid pipeline length (generic)"
    severity failure;

  sbox_forward_out <= sbox_forward_lut(to_integer(unsigned(data_in)));
  data_out <= std_logic_vector(to_unsigned(sbox_forward_out, 8));

end architecture lut;