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161 lines
5.5 KiB
161 lines
5.5 KiB
-- ======================================================================
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-- DES encryption/decryption testbench
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-- tests according to NIST 800-16 special publication
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-- Copyright (C) 2011 Torsten Meissner
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-------------------------------------------------------------------------
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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-- ======================================================================
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-- Revision 1.0 2011/09/17
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-- Initial release
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-- Revision 1.0.1 2011/09/18
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-- tests partial adopted to NIST 800-16 publication
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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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entity tb_des is
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end entity tb_des;
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architecture rtl of tb_des is
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type t_array is array (natural range <>) of std_logic_vector(0 to 63);
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signal s_variable_plaintext_known_answers : t_array(0 to 63) :=
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(x"95F8A5E5DD31D900", x"DD7F121CA5015619", x"2E8653104F3834EA",
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x"4BD388FF6CD81D4F", x"20B9E767B2FB1456", x"55579380D77138EF",
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x"6CC5DEFAAF04512F", x"0D9F279BA5D87260", x"D9031B0271BD5A0A",
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x"424250B37C3DD951", x"B8061B7ECD9A21E5", x"F15D0F286B65BD28",
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x"ADD0CC8D6E5DEBA1", x"E6D5F82752AD63D1", x"ECBFE3BD3F591A5E",
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x"F356834379D165CD", x"2B9F982F20037FA9", x"889DE068A16F0BE6",
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x"E19E275D846A1298", x"329A8ED523D71AEC", x"E7FCE22557D23C97",
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x"12A9F5817FF2D65D", x"A484C3AD38DC9C19", x"FBE00A8A1EF8AD72",
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x"750D079407521363", x"64FEED9C724C2FAF", x"F02B263B328E2B60",
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x"9D64555A9A10B852", x"D106FF0BED5255D7", x"E1652C6B138C64A5",
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x"E428581186EC8F46", x"AEB5F5EDE22D1A36", x"E943D7568AEC0C5C",
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x"DF98C8276F54B04B", x"B160E4680F6C696F", x"FA0752B07D9C4AB8",
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x"CA3A2B036DBC8502", x"5E0905517BB59BCF", x"814EEB3B91D90726",
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x"4D49DB1532919C9F", x"25EB5FC3F8CF0621", x"AB6A20C0620D1C6F",
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x"79E90DBC98F92CCA", x"866ECEDD8072BB0E", x"8B54536F2F3E64A8",
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x"EA51D3975595B86B", x"CAFFC6AC4542DE31", x"8DD45A2DDF90796C",
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x"1029D55E880EC2D0", x"5D86CB23639DBEA9", x"1D1CA853AE7C0C5F",
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x"CE332329248F3228", x"8405D1ABE24FB942", x"E643D78090CA4207",
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x"48221B9937748A23", x"DD7C0BBD61FAFD54", x"2FBC291A570DB5C4",
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x"E07C30D7E4E26E12", x"0953E2258E8E90A1", x"5B711BC4CEEBF2EE",
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x"CC083F1E6D9E85F6", x"D2FD8867D50D2DFE", x"06E7EA22CE92708F",
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x"166B40B44ABA4BD6");
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signal s_clk : std_logic := '0';
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signal s_mode : std_logic := '0';
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signal s_key : std_logic_vector(0 to 63) := (others => '0');
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signal s_datain : std_logic_vector(0 to 63) := (others => '0');
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signal s_validin : std_logic := '0';
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signal s_dataout : std_logic_vector(0 to 63);
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signal s_validout : std_logic;
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component des is
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port (
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clk_i : in std_logic;
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mode_i : in std_logic;
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key_i : in std_logic_vector(0 TO 63);
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data_i : in std_logic_vector(0 TO 63);
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valid_i : in std_logic;
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data_o : out std_logic_vector(0 TO 63);
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valid_o : out std_logic
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);
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end component des;
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begin
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s_clk <= not(s_clk) after 10 ns;
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teststimuliP : process is
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begin
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s_mode <= '0';
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s_validin <= '0';
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s_key <= x"5555555555555555";
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s_datain <= x"8000000000000000";
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report "# encryption test";
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for index in s_variable_plaintext_known_answers'range loop
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wait until rising_edge(s_clk);
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s_validin <= '1';
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if(index /= 0) then
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s_datain <= '0' & s_datain(0 to 62);
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end if;
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end loop;
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wait until rising_edge(s_clk);
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s_validin <= '0';
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wait for 100 ns;
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report "# decryption test";
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for index in s_variable_plaintext_known_answers'range loop
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wait until rising_edge(s_clk);
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s_mode <= '1';
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s_validin <= '1';
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s_datain <= s_variable_plaintext_known_answers(index);
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end loop;
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wait until rising_edge(s_clk);
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s_mode <= '0';
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s_validin <= '0';
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s_key <= (others => '0');
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s_datain <= (others => '0');
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wait;
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end process teststimuliP;
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testcheckerP : process is
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variable v_variable_ciphertext_known_answers : std_logic_vector(0 to 63) := x"8000000000000000";
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begin
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for index in s_variable_plaintext_known_answers'range loop
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wait until rising_edge(s_clk) and s_validout = '1';
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if(s_dataout /= s_variable_plaintext_known_answers(index)) then
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report "encryption error";
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end if;
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end loop;
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for index in s_variable_plaintext_known_answers'range loop
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wait until rising_edge(s_clk) and s_validout = '1';
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if(s_dataout /= v_variable_ciphertext_known_answers) then
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report "decryption error";
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end if;
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v_variable_ciphertext_known_answers := '0' & v_variable_ciphertext_known_answers(0 to 62);
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end loop;
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wait;
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end process testcheckerP;
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i_des : des
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port map (
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clk_i => s_clk,
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mode_i => s_mode,
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key_i => s_key,
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data_i => s_datain,
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valid_i => s_validin,
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data_o => s_dataout,
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valid_o => s_validout
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);
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end architecture rtl;
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