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srmcqueen |
----------------------------------------------------------------------
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---- ----
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---- Basic DES Block Cypher IP Core ----
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---- ----
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---- Implementation of DES-56 ECB mode IP core. ----
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---- ----
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---- To Do: ----
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---- - ----
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---- ----
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---- Author(s): ----
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---- - Steven R. McQueen, srmcqueen@opencores.org ----
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---- ----
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----------------------------------------------------------------------
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---- ----
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---- Copyright (C) 2003 Steven R. McQueen ----
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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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-- CVS Revision History
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--
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-- $Log: not supported by cvs2svn $
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srmcqueen |
-- Revision 1.1.1.1 2003/10/20 03:51:08 srmcqueen
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-- First Upload, working module
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srmcqueen |
--
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srmcqueen |
--
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srmcqueen |
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-- This module implements the DES 56-bit Key Block Cypher. It expects to receive the 64-bit
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-- data block to be encrypted or decrypted on the indata bus, and the 64-bit key on the inKey
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-- bus. When the DS signal is high, encryption/decryption begins. If the DECIPHER signal is
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-- low when the DS signal is raised, the operation will be encryption. If the DECIPHER signal
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-- is high when the DS signal goes high, the operation will be decryption. With each clock
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-- cycle, one round of encryption is performed. After 16 rounds, the resulting message block
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-- is presented on the OUTDATA bus and the RDY signal is set high.
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--
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-- Comments, questions and suggestions may be directed to the author at srmcqueen@mcqueentech.com.
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srmcqueen |
-- 2005/09/02
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-- Optimized key handling
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-- added optional signals, changed RDY to be low on reset
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-- Perttu Fagerlund
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srmcqueen |
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srmcqueen |
-- 2005/10/15
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-- Added comments
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-- Steven R. McQueen
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--
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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.numeric_std.all;
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srmcqueen |
-- Uncomment the following lines to use the declarations that are
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-- provided for instantiating Xilinx primitive components.
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--library UNISIM;
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--use UNISIM.VComponents.all;
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srmcqueen |
ENTITY des56 IS
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PORT(
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indata : IN std_logic_vector (0 TO 63);
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inkey : IN std_logic_vector (0 TO 63);
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outdata : OUT std_logic_vector (0 TO 63);
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decipher : IN std_logic;
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ds : IN std_logic;
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clk : IN std_logic;
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rst : IN std_logic;
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rdy_next_next_cycle : OUT std_logic; -- output will be ready in two clock cycles - optional signal
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rdy_next_cycle : OUT std_logic; -- output will be ready in one clock cycle - optional signal
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rdy : OUT std_logic -- output is ready NOW
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);
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srmcqueen |
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srmcqueen |
END des56 ;
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srmcqueen |
architecture des of des56 is
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srmcqueen |
-- ***********************************************************
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-- * The following attributes are useful in Xilinx ISE
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-- * for debugging purposes. They have been commented
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-- * out to permit logic optimization.
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-- ***********************************************************
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srmcqueen |
--attribute keep: string;
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--attribute nodelay: string;
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--attribute s: string;
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--attribute nodelay of indata: signal is "true";
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--attribute nodelay of inkey: signal is "true";
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--attribute nodelay of decipher: signal is "true";
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--attribute nodelay of ds: signal is "true";
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--attribute nodelay of clk: signal is "true";
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--attribute nodelay of rst: signal is "true";
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--attribute nodelay of rdy: signal is "true";
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--attribute nodelay of outdata: signal is "true";
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--attribute s of indata: signal is "yes";
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--attribute s of inkey: signal is "yes";
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--attribute s of decipher: signal is "yes";
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--attribute s of ds: signal is "yes";
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--attribute s of clk: signal is "yes";
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--attribute s of rst: signal is "yes";
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--attribute s of rdy: signal is "yes";
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--attribute s of outdata: signal is "yes";
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--signal xclk: std_logic;
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--attribute keep of xclk: signal is "true";
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-- mykey and inmsg are inputs to the encryption round logic
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-- they will get new values on each clock
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-- outmsg is the result of the encryption round, it will become inmsg for the next round
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-- there are 16 encryption rounds in DES
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signal mykey: std_logic_vector(0 to 47);
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--attribute keep of mykey: signal is "true";
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signal inmsg: std_logic_vector(0 to 63);
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--attribute keep of inmsg: signal is "true";
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signal outmsg: std_logic_vector(0 to 63);
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--attribute keep of outmsg: signal is "true";
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-- round counters. countup is used for encryption, countdown is for decryption
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-- mycounter takes its value from countup or countdown
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signal countup: integer range 0 to 16;
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signal countdown: integer range 0 to 16;
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signal mycounter: integer range 0 to 16;
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--attribute keep of mycounter: signal is "true";
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-- the decrypt register holds the decrypt/encrypt switch
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signal decrypt: std_logic;
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signal ready: std_logic;
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srmcqueen |
-- **********************************************
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-- * New key registers.
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-- **********************************************
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signal key_l : std_logic_vector(0 to 27);
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signal key_r : std_logic_vector(0 to 27);
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signal keylr : std_logic_vector(0 to 55);
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-- ******************************************************************
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-- * various work signals. I want most of them to be wires, but
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-- * they may be registers or latches, depending on the synthesizer
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-- ******************************************************************
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srmcqueen |
signal d: std_logic_vector(0 to 47);
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signal f: std_logic_vector(0 to 31);
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signal b1: std_logic_vector(0 to 5);
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signal b2: std_logic_vector(0 to 5);
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signal b3: std_logic_vector(0 to 5);
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signal b4: std_logic_vector(0 to 5);
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signal b5: std_logic_vector(0 to 5);
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signal b6: std_logic_vector(0 to 5);
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signal b7: std_logic_vector(0 to 5);
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signal b8: std_logic_vector(0 to 5);
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signal s1: std_logic_vector(0 to 3);
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signal s2: std_logic_vector(0 to 3);
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signal s3: std_logic_vector(0 to 3);
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signal s4: std_logic_vector(0 to 3);
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signal s5: std_logic_vector(0 to 3);
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signal s6: std_logic_vector(0 to 3);
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signal s7: std_logic_vector(0 to 3);
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signal s8: std_logic_vector(0 to 3);
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begin
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srmcqueen |
-- ***************************************************************************************************
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-- * Route wires to copy the key value for the next encryption round
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-- ***************************************************************************************************
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keylr <= key_l & key_r;
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mykey <= keylr(13) & keylr(16) & keylr(10) & keylr(23) & keylr(0) & keylr(4) & keylr(2) & keylr(27) &
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keylr(14) & keylr(5) & keylr(20) & keylr(9) & keylr(22) & keylr(18) & keylr(11) & keylr(3) &
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keylr(25) & keylr(7) & keylr(15) & keylr(6) & keylr(26) & keylr(19) & keylr(12) & keylr(1) &
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keylr(40) & keylr(51) & keylr(30) & keylr(36) & keylr(46) & keylr(54) & keylr(29) & keylr(39) &
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keylr(50) & keylr(44) & keylr(32) & keylr(47) & keylr(43) & keylr(48) & keylr(38) & keylr(55) &
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keylr(33) & keylr(52) & keylr(45) & keylr(41) & keylr(49) & keylr(35) & keylr(28) & keylr(31);
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SetKey: process (clk, countup, decipher)
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-- *********************************************************************************************
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-- * New key management logic by Perttu Fagerlund
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-- * On the first clock, the first round key is registered. Thereafter, the round key is simply
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-- * shifted by the necessary number of bits. This saves more than 57% of the required register
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-- * logic cells over the previous code, which directly registered all of the round keys at once.
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-- *
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-- * A very slight speed increase may be realized due to shorter signal paths in the final fit.
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-- *
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-- * Use the current value of COUNTUP to determine which round of encryption is next.
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-- * Load the KEY_L and KEY_R registers with the appropriate round key value.
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-- * Note that on the first pass, the round key is not available, and must be
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-- * loaded directly from the input signals. The correct value is determined by
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-- * the state of the DECIPHER signal.
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-- *********************************************************************************************
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srmcqueen |
begin
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if rising_edge(clk) then
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case countup is
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when 0 =>
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srmcqueen |
if (decipher = '0') then
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-- these are readily shifted left by one !
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key_l <= inkey(48) & inkey(40) & inkey(32) & inkey(24) & inkey(16) & inkey(8) & inkey(0) &
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inkey(57) & inkey(49) & inkey(41) & inkey(33) & inkey(25) & inkey(17) & inkey(9) & inkey(1) &
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inkey(58) & inkey(50) & inkey(42) & inkey(34) & inkey(26) & inkey(18) & inkey(10) & inkey(2) &
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inkey(59) & inkey(51) & inkey(43) & inkey(35) & inkey(56);
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key_r <= inkey(54) & inkey(46) & inkey(38) & inkey(30) & inkey(22) & inkey(14) & inkey(6) &
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inkey(61) & inkey(53) & inkey(45) & inkey(37) & inkey(29) & inkey(21) & inkey(13) & inkey(5) &
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inkey(60) & inkey(52) & inkey(44) & inkey(36) & inkey(28) & inkey(20) & inkey(12) & inkey(4) &
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inkey(27) & inkey(19) & inkey(11) & inkey(3) & inkey(62);
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else
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key_l <= inkey(56) & inkey(48) & inkey(40) & inkey(32) & inkey(24) & inkey(16) & inkey(8) & inkey(0) &
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inkey(57) & inkey(49) & inkey(41) & inkey(33) & inkey(25) & inkey(17) & inkey(9) & inkey(1) &
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inkey(58) & inkey(50) & inkey(42) & inkey(34) & inkey(26) & inkey(18) & inkey(10) & inkey(2) &
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inkey(59) & inkey(51) & inkey(43) & inkey(35);
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key_r <= inkey(62) & inkey(54) & inkey(46) & inkey(38) & inkey(30) & inkey(22) & inkey(14) & inkey(6) &
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inkey(61) & inkey(53) & inkey(45) & inkey(37) & inkey(29) & inkey(21) & inkey(13) & inkey(5) &
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inkey(60) & inkey(52) & inkey(44) & inkey(36) & inkey(28) & inkey(20) & inkey(12) & inkey(4) &
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inkey(27) & inkey(19) & inkey(11) & inkey(3);
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end if;
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srmcqueen |
when 1 =>
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4 |
srmcqueen |
if (decipher = '1') then
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key_l(0 to 27) <= key_l(27) & key_l(0 to 26);
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key_r(0 to 27) <= key_r(27) & key_r(0 to 26);
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else
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| 236 |
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key_l(0 to 27) <= key_l(1 to 27) & key_l(0);
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key_r(0 to 27) <= key_r(1 to 27) & key_r(0);
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| 238 |
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end if;
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| 239 |
2 |
srmcqueen |
when 2 =>
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| 240 |
4 |
srmcqueen |
if (decipher = '1') then
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| 241 |
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key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
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| 242 |
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key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
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| 243 |
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else
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| 244 |
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key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
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| 245 |
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key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
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| 246 |
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end if;
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| 247 |
2 |
srmcqueen |
when 3 =>
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| 248 |
4 |
srmcqueen |
if (decipher = '1') then
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| 249 |
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key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
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| 250 |
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key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
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else
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| 252 |
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key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
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key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
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end if;
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| 255 |
2 |
srmcqueen |
when 4 =>
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| 256 |
4 |
srmcqueen |
if (decipher = '1') then
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| 257 |
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key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
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key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
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else
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| 260 |
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key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
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key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
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end if;
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| 263 |
2 |
srmcqueen |
when 5 =>
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| 264 |
4 |
srmcqueen |
if (decipher = '1') then
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key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
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key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
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| 267 |
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else
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| 268 |
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key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
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key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
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end if;
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2 |
srmcqueen |
when 6 =>
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| 272 |
4 |
srmcqueen |
if (decipher = '1') then
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key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
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key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
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else
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|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 277 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 278 |
|
|
end if;
|
| 279 |
2 |
srmcqueen |
when 7 =>
|
| 280 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 281 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 282 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 283 |
|
|
else
|
| 284 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 285 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 286 |
|
|
end if;
|
| 287 |
2 |
srmcqueen |
when 8 =>
|
| 288 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 289 |
|
|
key_l(0 to 27) <= key_l(27) & key_l(0 to 26);
|
| 290 |
|
|
key_r(0 to 27) <= key_r(27) & key_r(0 to 26);
|
| 291 |
|
|
else
|
| 292 |
|
|
key_l(0 to 27) <= key_l(1 to 27) & key_l(0);
|
| 293 |
|
|
key_r(0 to 27) <= key_r(1 to 27) & key_r(0);
|
| 294 |
|
|
end if;
|
| 295 |
2 |
srmcqueen |
when 9 =>
|
| 296 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 297 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 298 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 299 |
|
|
else
|
| 300 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 301 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 302 |
|
|
end if;
|
| 303 |
2 |
srmcqueen |
when 10 =>
|
| 304 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 305 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 306 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 307 |
|
|
else
|
| 308 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 309 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 310 |
|
|
end if;
|
| 311 |
2 |
srmcqueen |
when 11 =>
|
| 312 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 313 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 314 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 315 |
|
|
else
|
| 316 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 317 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 318 |
|
|
end if;
|
| 319 |
2 |
srmcqueen |
when 12 =>
|
| 320 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 321 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 322 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 323 |
|
|
else
|
| 324 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 325 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 326 |
|
|
end if;
|
| 327 |
2 |
srmcqueen |
when 13 =>
|
| 328 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 329 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 330 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 331 |
|
|
else
|
| 332 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 333 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 334 |
|
|
end if;
|
| 335 |
2 |
srmcqueen |
when 14 =>
|
| 336 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 337 |
|
|
key_l(0 to 27) <= key_l(26 to 27) & key_l(0 to 25);
|
| 338 |
|
|
key_r(0 to 27) <= key_r(26 to 27) & key_r(0 to 25);
|
| 339 |
|
|
else
|
| 340 |
|
|
key_l(0 to 27) <= key_l(2 to 27) & key_l(0 to 1);
|
| 341 |
|
|
key_r(0 to 27) <= key_r(2 to 27) & key_r(0 to 1);
|
| 342 |
|
|
end if;
|
| 343 |
2 |
srmcqueen |
when 15 =>
|
| 344 |
4 |
srmcqueen |
if (decipher = '1') then
|
| 345 |
|
|
key_l(0 to 27) <= key_l(27) & key_l(0 to 26);
|
| 346 |
|
|
key_r(0 to 27) <= key_r(27) & key_r(0 to 26);
|
| 347 |
|
|
else
|
| 348 |
|
|
key_l(0 to 27) <= key_l(1 to 27) & key_l(0);
|
| 349 |
|
|
key_r(0 to 27) <= key_r(1 to 27) & key_r(0);
|
| 350 |
|
|
end if;
|
| 351 |
2 |
srmcqueen |
when others =>
|
| 352 |
|
|
end case;
|
| 353 |
|
|
end if;
|
| 354 |
|
|
|
| 355 |
|
|
end process SetKey;
|
| 356 |
|
|
|
| 357 |
|
|
|
| 358 |
4 |
srmcqueen |
|
| 359 |
|
|
-- **********************************************************************************************
|
| 360 |
|
|
-- * Load the message word for the next encryption round
|
| 361 |
|
|
-- * As in SetKey, the data must be taken from the input ports on the first round.
|
| 362 |
|
|
-- * For all other rounds, the data value is taken from the OUTMSG signal. This signal
|
| 363 |
|
|
-- * is produced by combinatorial logic.
|
| 364 |
|
|
-- *
|
| 365 |
|
|
-- * The first round of this cycle can be the last round of the previous cycle. Output is
|
| 366 |
|
|
-- * driven at this time.
|
| 367 |
|
|
-- **********************************************************************************************
|
| 368 |
2 |
srmcqueen |
SetData: process (clk, countup, rst, ds)
|
| 369 |
|
|
variable C17: std_logic_vector(1 to 64);
|
| 370 |
|
|
begin
|
| 371 |
|
|
if rst = '1' then
|
| 372 |
4 |
srmcqueen |
-- rdy <= '1'; -- Original implementation - rdy is set high at reset
|
| 373 |
|
|
rdy <= '0'; -- Optional implementation - rdy is set low at reset
|
| 374 |
2 |
srmcqueen |
elsif rising_edge(clk) then
|
| 375 |
4 |
srmcqueen |
rdy <= '0';
|
| 376 |
|
|
|
| 377 |
2 |
srmcqueen |
case countup is
|
| 378 |
|
|
when 0 =>
|
| 379 |
|
|
if ds = '1' then
|
| 380 |
4 |
srmcqueen |
-- new data: clock INMSG values directly from input signal
|
| 381 |
2 |
srmcqueen |
inmsg <= indata(57) & indata(49) & indata(41) & indata(33) & indata(25) & indata(17) & indata(9) & indata(1) &
|
| 382 |
|
|
indata(59) & indata(51) & indata(43) & indata(35) & indata(27) & indata(19) & indata(11) & indata(3) &
|
| 383 |
|
|
indata(61) & indata(53) & indata(45) & indata(37) & indata(29) & indata(21) & indata(13) & indata(5) &
|
| 384 |
|
|
indata(63) & indata(55) & indata(47) & indata(39) & indata(31) & indata(23) & indata(15) & indata(7) &
|
| 385 |
|
|
indata(56) & indata(48) & indata(40) & indata(32) & indata(24) & indata(16) & indata(8) & indata(0) &
|
| 386 |
|
|
indata(58) & indata(50) & indata(42) & indata(34) & indata(26) & indata(18) & indata(10) & indata(2) &
|
| 387 |
|
|
indata(60) & indata(52) & indata(44) & indata(36) & indata(28) & indata(20) & indata(12) & indata(4) &
|
| 388 |
|
|
indata(62) & indata(54) & indata(46) & indata(38) & indata(30) & indata(22) & indata(14) & indata(6);
|
| 389 |
|
|
rdy <= '0'; -- Manage the "Data ready" signal
|
| 390 |
|
|
end if;
|
| 391 |
|
|
if ready = '0' then --ready is really a "crypto in progress" signal
|
| 392 |
4 |
srmcqueen |
-- Copy previous round output message data into local wire
|
| 393 |
2 |
srmcqueen |
C17(1 to 32) := outmsg(32 to 63);
|
| 394 |
|
|
C17(33 to 64) := outmsg(0 to 31);
|
| 395 |
4 |
srmcqueen |
|
| 396 |
|
|
-- clock output message data to output vector. C17 was not strictly required but it made things easier for me.
|
| 397 |
2 |
srmcqueen |
outdata <= C17(40) & C17(8) & C17(48) & C17(16) & C17(56) & C17(24) & C17(64) & C17(32) &
|
| 398 |
|
|
C17(39) & C17(7) & C17(47) & C17(15) & C17(55) & C17(23) & C17(63) & C17(31) &
|
| 399 |
|
|
C17(38) & C17(6) & C17(46) & C17(14) & C17(54) & C17(22) & C17(62) & C17(30) &
|
| 400 |
|
|
C17(37) & C17(5) & C17(45) & C17(13) & C17(53) & C17(21) & C17(61) & C17(29) &
|
| 401 |
|
|
C17(36) & C17(4) & C17(44) & C17(12) & C17(52) & C17(20) & C17(60) & C17(28) &
|
| 402 |
|
|
C17(35) & C17(3) & C17(43) & C17(11) & C17(51) & C17(19) & C17(59) & C17(27) &
|
| 403 |
|
|
C17(34) & C17(2) & C17(42) & C17(10) & C17(50) & C17(18) & C17(58) & C17(26) &
|
| 404 |
|
|
C17(33) & C17(1) & C17(41) & C17(9) & C17(49) & C17(17) & C17(57) & C17(25);
|
| 405 |
4 |
srmcqueen |
rdy <= '1'; -- indicate that valid output is on the bus
|
| 406 |
2 |
srmcqueen |
end if;
|
| 407 |
|
|
when others =>
|
| 408 |
4 |
srmcqueen |
inmsg <= outmsg; -- clock previous round output into next round input vector
|
| 409 |
|
|
rdy <= '0'; -- manage the "data ready" signal
|
| 410 |
2 |
srmcqueen |
end case;
|
| 411 |
|
|
end if;
|
| 412 |
|
|
|
| 413 |
|
|
end process setdata;
|
| 414 |
|
|
|
| 415 |
|
|
|
| 416 |
4 |
srmcqueen |
-- *************************************************************
|
| 417 |
|
|
-- * This handles the READY signal and counts the counters
|
| 418 |
|
|
-- *************************************************************
|
| 419 |
2 |
srmcqueen |
Control: process (clk, ready, ds, RST, countup)
|
| 420 |
|
|
|
| 421 |
|
|
begin
|
| 422 |
|
|
|
| 423 |
|
|
if RST = '1' then
|
| 424 |
4 |
srmcqueen |
-- assign reset values
|
| 425 |
2 |
srmcqueen |
ready <= '1';
|
| 426 |
|
|
countup <= 0;
|
| 427 |
4 |
srmcqueen |
rdy_next_cycle <= '0';
|
| 428 |
|
|
rdy_next_next_cycle <= '0';
|
| 429 |
2 |
srmcqueen |
|
| 430 |
|
|
elsif rising_edge(clk) then
|
| 431 |
4 |
srmcqueen |
rdy_next_cycle <= '0';
|
| 432 |
|
|
rdy_next_next_cycle <= '0';
|
| 433 |
2 |
srmcqueen |
if ready = '1' then
|
| 434 |
|
|
if ds = '1' then
|
| 435 |
4 |
srmcqueen |
-- data is being accepted. Assign starting clock and Data Ready values
|
| 436 |
2 |
srmcqueen |
ready <= '0';
|
| 437 |
|
|
countup <= 1;
|
| 438 |
|
|
end if;
|
| 439 |
|
|
else
|
| 440 |
|
|
if countup = 0 then
|
| 441 |
4 |
srmcqueen |
-- if counter is cleared and no input data, then
|
| 442 |
|
|
-- indicate that device is waiting for work
|
| 443 |
2 |
srmcqueen |
if ds = '0' then
|
| 444 |
|
|
ready <= '1';
|
| 445 |
|
|
end if;
|
| 446 |
4 |
srmcqueen |
elsif countup < 14 then
|
| 447 |
|
|
-- for counter = 1-13, just increment the counter
|
| 448 |
2 |
srmcqueen |
countup <= countup + 1;
|
| 449 |
4 |
srmcqueen |
elsif countup < 15 then
|
| 450 |
|
|
-- for counter = 14, increment the counter and
|
| 451 |
|
|
-- indicate that data will be ready in two clocks
|
| 452 |
|
|
countup <= countup + 1;
|
| 453 |
|
|
rdy_next_next_cycle <= '1';
|
| 454 |
2 |
srmcqueen |
else
|
| 455 |
4 |
srmcqueen |
-- for counter = 15, increment the counter and
|
| 456 |
|
|
-- indicate that data will be ready on the next clock
|
| 457 |
2 |
srmcqueen |
countup <= 0;
|
| 458 |
4 |
srmcqueen |
rdy_next_cycle <= '1';
|
| 459 |
2 |
srmcqueen |
end if;
|
| 460 |
|
|
end if;
|
| 461 |
|
|
end if;
|
| 462 |
|
|
|
| 463 |
|
|
end process control;
|
| 464 |
|
|
|
| 465 |
|
|
|
| 466 |
|
|
-- Combinatorial Logic
|
| 467 |
|
|
-- all of this takes around 7-8ns. Is there a way to make it faster?
|
| 468 |
|
|
--
|
| 469 |
|
|
-- expand 32 bits of the message word to 48 bits, mix it with the round key,
|
| 470 |
|
|
-- then load it into 6-bit indexes.
|
| 471 |
|
|
b1 <= (inmsg(63) & inmsg(36) & inmsg(32 to 35)) xor (mykey(0) & mykey(5) & mykey(1 to 4));
|
| 472 |
|
|
b2 <= (inmsg(35) & inmsg(40) & inmsg(36 to 39)) xor (mykey(6) & mykey(11) & mykey(7 to 10));
|
| 473 |
|
|
b3 <= (inmsg(39) & inmsg(44) & inmsg(40 to 43)) xor (mykey(12) & mykey(17) & mykey(13 to 16));
|
| 474 |
|
|
b4 <= (inmsg(43) & inmsg(48) & inmsg(44 to 47)) xor (mykey(18) & mykey(23) & mykey(19 to 22));
|
| 475 |
|
|
b5 <= (inmsg(47) & inmsg(52) & inmsg(48 to 51)) xor (mykey(24) & mykey(29) & mykey(25 to 28));
|
| 476 |
|
|
b6 <= (inmsg(51) & inmsg(56) & inmsg(52 to 55)) xor (mykey(30) & mykey(35) & mykey(31 to 34));
|
| 477 |
|
|
b7 <= (inmsg(55) & inmsg(60) & inmsg(56 to 59)) xor (mykey(36) & mykey(41) & mykey(37 to 40));
|
| 478 |
|
|
b8 <= (inmsg(59) & inmsg(32) & inmsg(60 to 63)) xor (mykey(42) & mykey(47) & mykey(43 to 46));
|
| 479 |
|
|
|
| 480 |
|
|
-- 8 select statements to look up 4-bit S Box values based on the 6-bit indexes.
|
| 481 |
|
|
with b1 select
|
| 482 |
|
|
s1 <= x"e" when "000000",
|
| 483 |
|
|
x"4" when "000001",
|
| 484 |
|
|
x"d" when "000010",
|
| 485 |
|
|
x"1" when "000011",
|
| 486 |
|
|
x"2" when "000100",
|
| 487 |
|
|
x"f" when "000101",
|
| 488 |
|
|
x"b" when "000110",
|
| 489 |
|
|
x"8" when "000111",
|
| 490 |
|
|
x"3" when "001000",
|
| 491 |
|
|
x"a" when "001001",
|
| 492 |
|
|
x"6" when "001010",
|
| 493 |
|
|
x"c" when "001011",
|
| 494 |
|
|
x"5" when "001100",
|
| 495 |
|
|
x"9" when "001101",
|
| 496 |
|
|
x"0" when "001110",
|
| 497 |
|
|
x"7" when "001111",
|
| 498 |
|
|
x"0" when "010000",
|
| 499 |
|
|
x"f" when "010001",
|
| 500 |
|
|
x"7" when "010010",
|
| 501 |
|
|
x"4" when "010011",
|
| 502 |
|
|
x"e" when "010100",
|
| 503 |
|
|
x"2" when "010101",
|
| 504 |
|
|
x"d" when "010110",
|
| 505 |
|
|
x"1" when "010111",
|
| 506 |
|
|
x"a" when "011000",
|
| 507 |
|
|
x"6" when "011001",
|
| 508 |
|
|
x"c" when "011010",
|
| 509 |
|
|
x"b" when "011011",
|
| 510 |
|
|
x"9" when "011100",
|
| 511 |
|
|
x"5" when "011101",
|
| 512 |
|
|
x"3" when "011110",
|
| 513 |
|
|
x"8" when "011111",
|
| 514 |
|
|
x"4" when "100000",
|
| 515 |
|
|
x"1" when "100001",
|
| 516 |
|
|
x"e" when "100010",
|
| 517 |
|
|
x"8" when "100011",
|
| 518 |
|
|
x"d" when "100100",
|
| 519 |
|
|
x"6" when "100101",
|
| 520 |
|
|
x"2" when "100110",
|
| 521 |
|
|
x"b" when "100111",
|
| 522 |
|
|
x"f" when "101000",
|
| 523 |
|
|
x"c" when "101001",
|
| 524 |
|
|
x"9" when "101010",
|
| 525 |
|
|
x"7" when "101011",
|
| 526 |
|
|
x"3" when "101100",
|
| 527 |
|
|
x"a" when "101101",
|
| 528 |
|
|
x"5" when "101110",
|
| 529 |
|
|
x"0" when "101111",
|
| 530 |
|
|
x"f" when "110000",
|
| 531 |
|
|
x"c" when "110001",
|
| 532 |
|
|
x"8" when "110010",
|
| 533 |
|
|
x"2" when "110011",
|
| 534 |
|
|
x"4" when "110100",
|
| 535 |
|
|
x"9" when "110101",
|
| 536 |
|
|
x"1" when "110110",
|
| 537 |
|
|
x"7" when "110111",
|
| 538 |
|
|
x"5" when "111000",
|
| 539 |
|
|
x"b" when "111001",
|
| 540 |
|
|
x"3" when "111010",
|
| 541 |
|
|
x"e" when "111011",
|
| 542 |
|
|
x"a" when "111100",
|
| 543 |
|
|
x"0" when "111101",
|
| 544 |
|
|
x"6" when "111110",
|
| 545 |
|
|
x"d" when "111111",
|
| 546 |
|
|
"XXXX" when others;
|
| 547 |
|
|
|
| 548 |
|
|
|
| 549 |
|
|
with b2 select
|
| 550 |
|
|
s2 <= x"f" when "000000",
|
| 551 |
|
|
x"1" when "000001",
|
| 552 |
|
|
x"8" when "000010",
|
| 553 |
|
|
x"e" when "000011",
|
| 554 |
|
|
x"6" when "000100",
|
| 555 |
|
|
x"b" when "000101",
|
| 556 |
|
|
x"3" when "000110",
|
| 557 |
|
|
x"4" when "000111",
|
| 558 |
|
|
x"9" when "001000",
|
| 559 |
|
|
x"7" when "001001",
|
| 560 |
|
|
x"2" when "001010",
|
| 561 |
|
|
x"d" when "001011",
|
| 562 |
|
|
x"c" when "001100",
|
| 563 |
|
|
x"0" when "001101",
|
| 564 |
|
|
x"5" when "001110",
|
| 565 |
|
|
x"a" when "001111",
|
| 566 |
|
|
x"3" when "010000",
|
| 567 |
|
|
x"d" when "010001",
|
| 568 |
|
|
x"4" when "010010",
|
| 569 |
|
|
x"7" when "010011",
|
| 570 |
|
|
x"f" when "010100",
|
| 571 |
|
|
x"2" when "010101",
|
| 572 |
|
|
x"8" when "010110",
|
| 573 |
|
|
x"e" when "010111",
|
| 574 |
|
|
x"c" when "011000",
|
| 575 |
|
|
x"0" when "011001",
|
| 576 |
|
|
x"1" when "011010",
|
| 577 |
|
|
x"a" when "011011",
|
| 578 |
|
|
x"6" when "011100",
|
| 579 |
|
|
x"9" when "011101",
|
| 580 |
|
|
x"b" when "011110",
|
| 581 |
|
|
x"5" when "011111",
|
| 582 |
|
|
x"0" when "100000",
|
| 583 |
|
|
x"e" when "100001",
|
| 584 |
|
|
x"7" when "100010",
|
| 585 |
|
|
x"b" when "100011",
|
| 586 |
|
|
x"a" when "100100",
|
| 587 |
|
|
x"4" when "100101",
|
| 588 |
|
|
x"d" when "100110",
|
| 589 |
|
|
x"1" when "100111",
|
| 590 |
|
|
x"5" when "101000",
|
| 591 |
|
|
x"8" when "101001",
|
| 592 |
|
|
x"c" when "101010",
|
| 593 |
|
|
x"6" when "101011",
|
| 594 |
|
|
x"9" when "101100",
|
| 595 |
|
|
x"3" when "101101",
|
| 596 |
|
|
x"2" when "101110",
|
| 597 |
|
|
x"f" when "101111",
|
| 598 |
|
|
x"d" when "110000",
|
| 599 |
|
|
x"8" when "110001",
|
| 600 |
|
|
x"a" when "110010",
|
| 601 |
|
|
x"1" when "110011",
|
| 602 |
|
|
x"3" when "110100",
|
| 603 |
|
|
x"f" when "110101",
|
| 604 |
|
|
x"4" when "110110",
|
| 605 |
|
|
x"2" when "110111",
|
| 606 |
|
|
x"b" when "111000",
|
| 607 |
|
|
x"6" when "111001",
|
| 608 |
|
|
x"7" when "111010",
|
| 609 |
|
|
x"c" when "111011",
|
| 610 |
|
|
x"0" when "111100",
|
| 611 |
|
|
x"5" when "111101",
|
| 612 |
|
|
x"e" when "111110",
|
| 613 |
|
|
x"9" when "111111",
|
| 614 |
|
|
"XXXX" when others;
|
| 615 |
|
|
|
| 616 |
|
|
with b3 select
|
| 617 |
|
|
s3 <= x"a" when "000000",
|
| 618 |
|
|
x"0" when "000001",
|
| 619 |
|
|
x"9" when "000010",
|
| 620 |
|
|
x"e" when "000011",
|
| 621 |
|
|
x"6" when "000100",
|
| 622 |
|
|
x"3" when "000101",
|
| 623 |
|
|
x"f" when "000110",
|
| 624 |
|
|
x"5" when "000111",
|
| 625 |
|
|
x"1" when "001000",
|
| 626 |
|
|
x"d" when "001001",
|
| 627 |
|
|
x"c" when "001010",
|
| 628 |
|
|
x"7" when "001011",
|
| 629 |
|
|
x"b" when "001100",
|
| 630 |
|
|
x"4" when "001101",
|
| 631 |
|
|
x"2" when "001110",
|
| 632 |
|
|
x"8" when "001111",
|
| 633 |
|
|
x"d" when "010000",
|
| 634 |
|
|
x"7" when "010001",
|
| 635 |
|
|
x"0" when "010010",
|
| 636 |
|
|
x"9" when "010011",
|
| 637 |
|
|
x"3" when "010100",
|
| 638 |
|
|
x"4" when "010101",
|
| 639 |
|
|
x"6" when "010110",
|
| 640 |
|
|
x"a" when "010111",
|
| 641 |
|
|
x"2" when "011000",
|
| 642 |
|
|
x"8" when "011001",
|
| 643 |
|
|
x"5" when "011010",
|
| 644 |
|
|
x"e" when "011011",
|
| 645 |
|
|
x"c" when "011100",
|
| 646 |
|
|
x"b" when "011101",
|
| 647 |
|
|
x"f" when "011110",
|
| 648 |
|
|
x"1" when "011111",
|
| 649 |
|
|
x"d" when "100000",
|
| 650 |
|
|
x"6" when "100001",
|
| 651 |
|
|
x"4" when "100010",
|
| 652 |
|
|
x"9" when "100011",
|
| 653 |
|
|
x"8" when "100100",
|
| 654 |
|
|
x"f" when "100101",
|
| 655 |
|
|
x"3" when "100110",
|
| 656 |
|
|
x"0" when "100111",
|
| 657 |
|
|
x"b" when "101000",
|
| 658 |
|
|
x"1" when "101001",
|
| 659 |
|
|
x"2" when "101010",
|
| 660 |
|
|
x"c" when "101011",
|
| 661 |
|
|
x"5" when "101100",
|
| 662 |
|
|
x"a" when "101101",
|
| 663 |
|
|
x"e" when "101110",
|
| 664 |
|
|
x"7" when "101111",
|
| 665 |
|
|
x"1" when "110000",
|
| 666 |
|
|
x"a" when "110001",
|
| 667 |
|
|
x"d" when "110010",
|
| 668 |
|
|
x"0" when "110011",
|
| 669 |
|
|
x"6" when "110100",
|
| 670 |
|
|
x"9" when "110101",
|
| 671 |
|
|
x"8" when "110110",
|
| 672 |
|
|
x"7" when "110111",
|
| 673 |
|
|
x"4" when "111000",
|
| 674 |
|
|
x"f" when "111001",
|
| 675 |
|
|
x"e" when "111010",
|
| 676 |
|
|
x"3" when "111011",
|
| 677 |
|
|
x"b" when "111100",
|
| 678 |
|
|
x"5" when "111101",
|
| 679 |
|
|
x"2" when "111110",
|
| 680 |
|
|
x"c" when "111111",
|
| 681 |
|
|
"XXXX" when others;
|
| 682 |
|
|
|
| 683 |
|
|
with b4 select
|
| 684 |
|
|
s4 <= x"7" when "000000",
|
| 685 |
|
|
x"d" when "000001",
|
| 686 |
|
|
x"e" when "000010",
|
| 687 |
|
|
x"3" when "000011",
|
| 688 |
|
|
x"0" when "000100",
|
| 689 |
|
|
x"6" when "000101",
|
| 690 |
|
|
x"9" when "000110",
|
| 691 |
|
|
x"a" when "000111",
|
| 692 |
|
|
x"1" when "001000",
|
| 693 |
|
|
x"2" when "001001",
|
| 694 |
|
|
x"8" when "001010",
|
| 695 |
|
|
x"5" when "001011",
|
| 696 |
|
|
x"b" when "001100",
|
| 697 |
|
|
x"c" when "001101",
|
| 698 |
|
|
x"4" when "001110",
|
| 699 |
|
|
x"f" when "001111",
|
| 700 |
|
|
x"d" when "010000",
|
| 701 |
|
|
x"8" when "010001",
|
| 702 |
|
|
x"b" when "010010",
|
| 703 |
|
|
x"5" when "010011",
|
| 704 |
|
|
x"6" when "010100",
|
| 705 |
|
|
x"f" when "010101",
|
| 706 |
|
|
x"0" when "010110",
|
| 707 |
|
|
x"3" when "010111",
|
| 708 |
|
|
x"4" when "011000",
|
| 709 |
|
|
x"7" when "011001",
|
| 710 |
|
|
x"2" when "011010",
|
| 711 |
|
|
x"c" when "011011",
|
| 712 |
|
|
x"1" when "011100",
|
| 713 |
|
|
x"a" when "011101",
|
| 714 |
|
|
x"e" when "011110",
|
| 715 |
|
|
x"9" when "011111",
|
| 716 |
|
|
x"a" when "100000",
|
| 717 |
|
|
x"6" when "100001",
|
| 718 |
|
|
x"9" when "100010",
|
| 719 |
|
|
x"0" when "100011",
|
| 720 |
|
|
x"c" when "100100",
|
| 721 |
|
|
x"b" when "100101",
|
| 722 |
|
|
x"7" when "100110",
|
| 723 |
|
|
x"d" when "100111",
|
| 724 |
|
|
x"f" when "101000",
|
| 725 |
|
|
x"1" when "101001",
|
| 726 |
|
|
x"3" when "101010",
|
| 727 |
|
|
x"e" when "101011",
|
| 728 |
|
|
x"5" when "101100",
|
| 729 |
|
|
x"2" when "101101",
|
| 730 |
|
|
x"8" when "101110",
|
| 731 |
|
|
x"4" when "101111",
|
| 732 |
|
|
x"3" when "110000",
|
| 733 |
|
|
x"f" when "110001",
|
| 734 |
|
|
x"0" when "110010",
|
| 735 |
|
|
x"6" when "110011",
|
| 736 |
|
|
x"a" when "110100",
|
| 737 |
|
|
x"1" when "110101",
|
| 738 |
|
|
x"d" when "110110",
|
| 739 |
|
|
x"8" when "110111",
|
| 740 |
|
|
x"9" when "111000",
|
| 741 |
|
|
x"4" when "111001",
|
| 742 |
|
|
x"5" when "111010",
|
| 743 |
|
|
x"b" when "111011",
|
| 744 |
|
|
x"c" when "111100",
|
| 745 |
|
|
x"7" when "111101",
|
| 746 |
|
|
x"2" when "111110",
|
| 747 |
|
|
x"e" when "111111",
|
| 748 |
|
|
"XXXX" when others;
|
| 749 |
|
|
|
| 750 |
|
|
with b5 select
|
| 751 |
|
|
s5 <= x"2" when "000000",
|
| 752 |
|
|
x"c" when "000001",
|
| 753 |
|
|
x"4" when "000010",
|
| 754 |
|
|
x"1" when "000011",
|
| 755 |
|
|
x"7" when "000100",
|
| 756 |
|
|
x"a" when "000101",
|
| 757 |
|
|
x"b" when "000110",
|
| 758 |
|
|
x"6" when "000111",
|
| 759 |
|
|
x"8" when "001000",
|
| 760 |
|
|
x"5" when "001001",
|
| 761 |
|
|
x"3" when "001010",
|
| 762 |
|
|
x"f" when "001011",
|
| 763 |
|
|
x"d" when "001100",
|
| 764 |
|
|
x"0" when "001101",
|
| 765 |
|
|
x"e" when "001110",
|
| 766 |
|
|
x"9" when "001111",
|
| 767 |
|
|
x"e" when "010000",
|
| 768 |
|
|
x"b" when "010001",
|
| 769 |
|
|
x"2" when "010010",
|
| 770 |
|
|
x"c" when "010011",
|
| 771 |
|
|
x"4" when "010100",
|
| 772 |
|
|
x"7" when "010101",
|
| 773 |
|
|
x"d" when "010110",
|
| 774 |
|
|
x"1" when "010111",
|
| 775 |
|
|
x"5" when "011000",
|
| 776 |
|
|
x"0" when "011001",
|
| 777 |
|
|
x"f" when "011010",
|
| 778 |
|
|
x"a" when "011011",
|
| 779 |
|
|
x"3" when "011100",
|
| 780 |
|
|
x"9" when "011101",
|
| 781 |
|
|
x"8" when "011110",
|
| 782 |
|
|
x"6" when "011111",
|
| 783 |
|
|
x"4" when "100000",
|
| 784 |
|
|
x"2" when "100001",
|
| 785 |
|
|
x"1" when "100010",
|
| 786 |
|
|
x"b" when "100011",
|
| 787 |
|
|
x"a" when "100100",
|
| 788 |
|
|
x"d" when "100101",
|
| 789 |
|
|
x"7" when "100110",
|
| 790 |
|
|
x"8" when "100111",
|
| 791 |
|
|
x"f" when "101000",
|
| 792 |
|
|
x"9" when "101001",
|
| 793 |
|
|
x"c" when "101010",
|
| 794 |
|
|
x"5" when "101011",
|
| 795 |
|
|
x"6" when "101100",
|
| 796 |
|
|
x"3" when "101101",
|
| 797 |
|
|
x"0" when "101110",
|
| 798 |
|
|
x"e" when "101111",
|
| 799 |
|
|
x"b" when "110000",
|
| 800 |
|
|
x"8" when "110001",
|
| 801 |
|
|
x"c" when "110010",
|
| 802 |
|
|
x"7" when "110011",
|
| 803 |
|
|
x"1" when "110100",
|
| 804 |
|
|
x"e" when "110101",
|
| 805 |
|
|
x"2" when "110110",
|
| 806 |
|
|
x"d" when "110111",
|
| 807 |
|
|
x"6" when "111000",
|
| 808 |
|
|
x"f" when "111001",
|
| 809 |
|
|
x"0" when "111010",
|
| 810 |
|
|
x"9" when "111011",
|
| 811 |
|
|
x"a" when "111100",
|
| 812 |
|
|
x"4" when "111101",
|
| 813 |
|
|
x"5" when "111110",
|
| 814 |
|
|
x"3" when "111111",
|
| 815 |
|
|
"XXXX" when others;
|
| 816 |
|
|
|
| 817 |
|
|
with b6 select
|
| 818 |
|
|
s6 <= x"c" when "000000",
|
| 819 |
|
|
x"1" when "000001",
|
| 820 |
|
|
x"a" when "000010",
|
| 821 |
|
|
x"f" when "000011",
|
| 822 |
|
|
x"9" when "000100",
|
| 823 |
|
|
x"2" when "000101",
|
| 824 |
|
|
x"6" when "000110",
|
| 825 |
|
|
x"8" when "000111",
|
| 826 |
|
|
x"0" when "001000",
|
| 827 |
|
|
x"d" when "001001",
|
| 828 |
|
|
x"3" when "001010",
|
| 829 |
|
|
x"4" when "001011",
|
| 830 |
|
|
x"e" when "001100",
|
| 831 |
|
|
x"7" when "001101",
|
| 832 |
|
|
x"5" when "001110",
|
| 833 |
|
|
x"b" when "001111",
|
| 834 |
|
|
x"a" when "010000",
|
| 835 |
|
|
x"f" when "010001",
|
| 836 |
|
|
x"4" when "010010",
|
| 837 |
|
|
x"2" when "010011",
|
| 838 |
|
|
x"7" when "010100",
|
| 839 |
|
|
x"c" when "010101",
|
| 840 |
|
|
x"9" when "010110",
|
| 841 |
|
|
x"5" when "010111",
|
| 842 |
|
|
x"6" when "011000",
|
| 843 |
|
|
x"1" when "011001",
|
| 844 |
|
|
x"d" when "011010",
|
| 845 |
|
|
x"e" when "011011",
|
| 846 |
|
|
x"0" when "011100",
|
| 847 |
|
|
x"b" when "011101",
|
| 848 |
|
|
x"3" when "011110",
|
| 849 |
|
|
x"8" when "011111",
|
| 850 |
|
|
x"9" when "100000",
|
| 851 |
|
|
x"e" when "100001",
|
| 852 |
|
|
x"f" when "100010",
|
| 853 |
|
|
x"5" when "100011",
|
| 854 |
|
|
x"2" when "100100",
|
| 855 |
|
|
x"8" when "100101",
|
| 856 |
|
|
x"c" when "100110",
|
| 857 |
|
|
x"3" when "100111",
|
| 858 |
|
|
x"7" when "101000",
|
| 859 |
|
|
x"0" when "101001",
|
| 860 |
|
|
x"4" when "101010",
|
| 861 |
|
|
x"a" when "101011",
|
| 862 |
|
|
x"1" when "101100",
|
| 863 |
|
|
x"d" when "101101",
|
| 864 |
|
|
x"b" when "101110",
|
| 865 |
|
|
x"6" when "101111",
|
| 866 |
|
|
x"4" when "110000",
|
| 867 |
|
|
x"3" when "110001",
|
| 868 |
|
|
x"2" when "110010",
|
| 869 |
|
|
x"c" when "110011",
|
| 870 |
|
|
x"9" when "110100",
|
| 871 |
|
|
x"5" when "110101",
|
| 872 |
|
|
x"f" when "110110",
|
| 873 |
|
|
x"a" when "110111",
|
| 874 |
|
|
x"b" when "111000",
|
| 875 |
|
|
x"e" when "111001",
|
| 876 |
|
|
x"1" when "111010",
|
| 877 |
|
|
x"7" when "111011",
|
| 878 |
|
|
x"6" when "111100",
|
| 879 |
|
|
x"0" when "111101",
|
| 880 |
|
|
x"8" when "111110",
|
| 881 |
|
|
x"d" when "111111",
|
| 882 |
|
|
"XXXX" when others;
|
| 883 |
|
|
|
| 884 |
|
|
with b7 select
|
| 885 |
|
|
s7 <= x"4" when "000000",
|
| 886 |
|
|
x"b" when "000001",
|
| 887 |
|
|
x"2" when "000010",
|
| 888 |
|
|
x"e" when "000011",
|
| 889 |
|
|
x"f" when "000100",
|
| 890 |
|
|
x"0" when "000101",
|
| 891 |
|
|
x"8" when "000110",
|
| 892 |
|
|
x"d" when "000111",
|
| 893 |
|
|
x"3" when "001000",
|
| 894 |
|
|
x"c" when "001001",
|
| 895 |
|
|
x"9" when "001010",
|
| 896 |
|
|
x"7" when "001011",
|
| 897 |
|
|
x"5" when "001100",
|
| 898 |
|
|
x"a" when "001101",
|
| 899 |
|
|
x"6" when "001110",
|
| 900 |
|
|
x"1" when "001111",
|
| 901 |
|
|
x"d" when "010000",
|
| 902 |
|
|
x"0" when "010001",
|
| 903 |
|
|
x"b" when "010010",
|
| 904 |
|
|
x"7" when "010011",
|
| 905 |
|
|
x"4" when "010100",
|
| 906 |
|
|
x"9" when "010101",
|
| 907 |
|
|
x"1" when "010110",
|
| 908 |
|
|
x"a" when "010111",
|
| 909 |
|
|
x"e" when "011000",
|
| 910 |
|
|
x"3" when "011001",
|
| 911 |
|
|
x"5" when "011010",
|
| 912 |
|
|
x"c" when "011011",
|
| 913 |
|
|
x"2" when "011100",
|
| 914 |
|
|
x"f" when "011101",
|
| 915 |
|
|
x"8" when "011110",
|
| 916 |
|
|
x"6" when "011111",
|
| 917 |
|
|
x"1" when "100000",
|
| 918 |
|
|
x"4" when "100001",
|
| 919 |
|
|
x"b" when "100010",
|
| 920 |
|
|
x"d" when "100011",
|
| 921 |
|
|
x"c" when "100100",
|
| 922 |
|
|
x"3" when "100101",
|
| 923 |
|
|
x"7" when "100110",
|
| 924 |
|
|
x"e" when "100111",
|
| 925 |
|
|
x"a" when "101000",
|
| 926 |
|
|
x"f" when "101001",
|
| 927 |
|
|
x"6" when "101010",
|
| 928 |
|
|
x"8" when "101011",
|
| 929 |
|
|
x"0" when "101100",
|
| 930 |
|
|
x"5" when "101101",
|
| 931 |
|
|
x"9" when "101110",
|
| 932 |
|
|
x"2" when "101111",
|
| 933 |
|
|
x"6" when "110000",
|
| 934 |
|
|
x"b" when "110001",
|
| 935 |
|
|
x"d" when "110010",
|
| 936 |
|
|
x"8" when "110011",
|
| 937 |
|
|
x"1" when "110100",
|
| 938 |
|
|
x"4" when "110101",
|
| 939 |
|
|
x"a" when "110110",
|
| 940 |
|
|
x"7" when "110111",
|
| 941 |
|
|
x"9" when "111000",
|
| 942 |
|
|
x"5" when "111001",
|
| 943 |
|
|
x"0" when "111010",
|
| 944 |
|
|
x"f" when "111011",
|
| 945 |
|
|
x"e" when "111100",
|
| 946 |
|
|
x"2" when "111101",
|
| 947 |
|
|
x"3" when "111110",
|
| 948 |
|
|
x"c" when "111111",
|
| 949 |
|
|
"XXXX" when others;
|
| 950 |
|
|
|
| 951 |
|
|
with b8 select
|
| 952 |
|
|
s8 <= x"d" when "000000",
|
| 953 |
|
|
x"2" when "000001",
|
| 954 |
|
|
x"8" when "000010",
|
| 955 |
|
|
x"4" when "000011",
|
| 956 |
|
|
x"6" when "000100",
|
| 957 |
|
|
x"f" when "000101",
|
| 958 |
|
|
x"b" when "000110",
|
| 959 |
|
|
x"1" when "000111",
|
| 960 |
|
|
x"a" when "001000",
|
| 961 |
|
|
x"9" when "001001",
|
| 962 |
|
|
x"3" when "001010",
|
| 963 |
|
|
x"e" when "001011",
|
| 964 |
|
|
x"5" when "001100",
|
| 965 |
|
|
x"0" when "001101",
|
| 966 |
|
|
x"c" when "001110",
|
| 967 |
|
|
x"7" when "001111",
|
| 968 |
|
|
x"1" when "010000",
|
| 969 |
|
|
x"f" when "010001",
|
| 970 |
|
|
x"d" when "010010",
|
| 971 |
|
|
x"8" when "010011",
|
| 972 |
|
|
x"a" when "010100",
|
| 973 |
|
|
x"3" when "010101",
|
| 974 |
|
|
x"7" when "010110",
|
| 975 |
|
|
x"4" when "010111",
|
| 976 |
|
|
x"c" when "011000",
|
| 977 |
|
|
x"5" when "011001",
|
| 978 |
|
|
x"6" when "011010",
|
| 979 |
|
|
x"b" when "011011",
|
| 980 |
|
|
x"0" when "011100",
|
| 981 |
|
|
x"e" when "011101",
|
| 982 |
|
|
x"9" when "011110",
|
| 983 |
|
|
x"2" when "011111",
|
| 984 |
|
|
x"7" when "100000",
|
| 985 |
|
|
x"b" when "100001",
|
| 986 |
|
|
x"4" when "100010",
|
| 987 |
|
|
x"1" when "100011",
|
| 988 |
|
|
x"9" when "100100",
|
| 989 |
|
|
x"c" when "100101",
|
| 990 |
|
|
x"e" when "100110",
|
| 991 |
|
|
x"2" when "100111",
|
| 992 |
|
|
x"0" when "101000",
|
| 993 |
|
|
x"6" when "101001",
|
| 994 |
|
|
x"a" when "101010",
|
| 995 |
|
|
x"d" when "101011",
|
| 996 |
|
|
x"f" when "101100",
|
| 997 |
|
|
x"3" when "101101",
|
| 998 |
|
|
x"5" when "101110",
|
| 999 |
|
|
x"8" when "101111",
|
| 1000 |
|
|
x"2" when "110000",
|
| 1001 |
|
|
x"1" when "110001",
|
| 1002 |
|
|
x"e" when "110010",
|
| 1003 |
|
|
x"7" when "110011",
|
| 1004 |
|
|
x"4" when "110100",
|
| 1005 |
|
|
x"a" when "110101",
|
| 1006 |
|
|
x"8" when "110110",
|
| 1007 |
|
|
x"d" when "110111",
|
| 1008 |
|
|
x"f" when "111000",
|
| 1009 |
|
|
x"c" when "111001",
|
| 1010 |
|
|
x"9" when "111010",
|
| 1011 |
|
|
x"0" when "111011",
|
| 1012 |
|
|
x"3" when "111100",
|
| 1013 |
|
|
x"5" when "111101",
|
| 1014 |
|
|
x"6" when "111110",
|
| 1015 |
|
|
x"b" when "111111",
|
| 1016 |
|
|
"XXXX" when others;
|
| 1017 |
|
|
|
| 1018 |
|
|
|
| 1019 |
|
|
-- Munge the S Boxes, then mix with the other 32 bits of the message word
|
| 1020 |
|
|
outmsg(32 to 63) <= (s4(3) & s2(2) & s5(3) & s6(0) & s8(0) & s3(3) & s7(3) & s5(0) &
|
| 1021 |
|
|
s1(0) & s4(2) & s6(2) & s7(1) & s2(0) & s5(1) & s8(2) & s3(1) &
|
| 1022 |
|
|
s1(1) & s2(3) & s6(3) & s4(1) & s8(3) & s7(2) & s1(2) & s3(0) &
|
| 1023 |
|
|
s5(2) & s4(0) & s8(1) & s2(1) & s6(1) & s3(2) & s1(3) & s7(0)) xor inmsg(0 to 31);
|
| 1024 |
|
|
|
| 1025 |
|
|
-- the first 32 bits of the round output are the last 32 bits of the round input.
|
| 1026 |
|
|
outmsg(0 to 31) <= inmsg(32 to 63);
|
| 1027 |
|
|
|
| 1028 |
|
|
end des;
|
| 1029 |
4 |
srmcqueen |
|
