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----------------------------------------------------------------------
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---- ----
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---- Pipelined Aes IP Core ----
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---- ----
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---- This file is part of the Pipelined AES project ----
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---- http://www.opencores.org/cores/aes_pipe/ ----
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---- ----
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---- Description ----
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---- Implementation of AES IP core according to ----
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---- FIPS PUB 197 specification document. ----
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---- ----
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---- To Do: ----
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---- - ----
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---- ----
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---- Author: ----
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---- - Subhasis Das, subhasis256@gmail.com ----
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---- ----
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----------------------------------------------------------------------
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---- ----
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---- Copyright (C) 2009 Authors and OPENCORES.ORG ----
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---- ----
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---- This source file may be used and distributed without ----
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---- restriction provided that this copyright statement is not ----
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---- removed from the file and that any derivative work contains ----
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---- the original copyright notice and the associated disclaimer. ----
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---- ----
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---- This source file is free software; you can redistribute it ----
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---- and/or modify it under the terms of the GNU Lesser General ----
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---- Public License as published by the Free Software Foundation; ----
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---- either version 2.1 of the License, or (at your option) any ----
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---- later version. ----
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---- ----
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---- This source is distributed in the hope that it will be ----
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---- useful, but WITHOUT ANY WARRANTY; without even the implied ----
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---- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ----
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---- PURPOSE. See the GNU Lesser General Public License for more ----
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---- details. ----
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---- ----
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---- You should have received a copy of the GNU Lesser General ----
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---- Public License along with this source; if not, download it ----
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---- from http://www.opencores.org/lgpl.shtml ----
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---- ----
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----------------------------------------------------------------------
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------------------------------------------------------
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-- Project: AESFast
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-- Author: Subhasis
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-- Last Modified: 20/03/10
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-- Email: subhasis256@gmail.com
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------------------------------------------------------
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--
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-- Description: The Datapath
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-- Ports:
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-- clk: System Clock
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-- plaintext: Input Plaintext Blocks three at a time
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-- keyblock: Input Key Blocks three at a time
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-- rcon: The rcon byte corresponding to the current stage
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-- inmux: Control Signal to determine whether take input
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-- op_en: Control Signal to generate o/p
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-- ciphertext: Output Cipher Block
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------------------------------------------------------
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library IEEE;
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use IEEE.std_logic_1164.all;
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use IEEE.std_logic_arith.all;
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use IEEE.std_logic_unsigned.all;
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library work;
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use work.aes_pkg.all;
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entity sbox is
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port(
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clk: in std_logic;
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bytein: in std_logic_vector(7 downto 0);
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byteout: out std_logic_vector(7 downto 0)
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);
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end sbox;
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architecture rtl of sbox is
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type ram_type is array(natural range<>) of std_logic_vector(7 downto 0);
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constant sbox_ram: ram_type(255 downto 0) :=
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(
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X"16", X"bb", X"54", X"b0", X"0f", X"2d", X"99", X"41", X"68", X"42", X"e6", X"bf", X"0d", X"89", X"a1", X"8c",
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X"df", X"28", X"55", X"ce", X"e9", X"87", X"1e", X"9b", X"94", X"8e", X"d9", X"69", X"11", X"98", X"f8", X"e1",
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X"9e", X"1d", X"c1", X"86", X"b9", X"57", X"35", X"61", X"0e", X"f6", X"03", X"48", X"66", X"b5", X"3e", X"70",
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X"8a", X"8b", X"bd", X"4b", X"1f", X"74", X"dd", X"e8", X"c6", X"b4", X"a6", X"1c", X"2e", X"25", X"78", X"ba",
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X"08", X"ae", X"7a", X"65", X"ea", X"f4", X"56", X"6c", X"a9", X"4e", X"d5", X"8d", X"6d", X"37", X"c8", X"e7",
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X"79", X"e4", X"95", X"91", X"62", X"ac", X"d3", X"c2", X"5c", X"24", X"06", X"49", X"0a", X"3a", X"32", X"e0",
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X"db", X"0b", X"5e", X"de", X"14", X"b8", X"ee", X"46", X"88", X"90", X"2a", X"22", X"dc", X"4f", X"81", X"60",
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X"73", X"19", X"5d", X"64", X"3d", X"7e", X"a7", X"c4", X"17", X"44", X"97", X"5f", X"ec", X"13", X"0c", X"cd",
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X"d2", X"f3", X"ff", X"10", X"21", X"da", X"b6", X"bc", X"f5", X"38", X"9d", X"92", X"8f", X"40", X"a3", X"51",
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X"a8", X"9f", X"3c", X"50", X"7f", X"02", X"f9", X"45", X"85", X"33", X"4d", X"43", X"fb", X"aa", X"ef", X"d0",
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X"cf", X"58", X"4c", X"4a", X"39", X"be", X"cb", X"6a", X"5b", X"b1", X"fc", X"20", X"ed", X"00", X"d1", X"53",
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X"84", X"2f", X"e3", X"29", X"b3", X"d6", X"3b", X"52", X"a0", X"5a", X"6e", X"1b", X"1a", X"2c", X"83", X"09",
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X"75", X"b2", X"27", X"eb", X"e2", X"80", X"12", X"07", X"9a", X"05", X"96", X"18", X"c3", X"23", X"c7", X"04",
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X"15", X"31", X"d8", X"71", X"f1", X"e5", X"a5", X"34", X"cc", X"f7", X"3f", X"36", X"26", X"93", X"fd", X"b7",
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X"c0", X"72", X"a4", X"9c", X"af", X"a2", X"d4", X"ad", X"f0", X"47", X"59", X"fa", X"7d", X"c9", X"82", X"ca",
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X"76", X"ab", X"d7", X"fe", X"2b", X"67", X"01", X"30", X"c5", X"6f", X"6b", X"f2", X"7b", X"77", X"7c", X"63"
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);
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begin
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process(clk)
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begin
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if(rising_edge(clk)) then
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byteout <= sbox_ram(conv_integer(bytein));
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end if;
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end process;
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end rtl;
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