Subversion Repositories desxcore

-- Copyright (c) 2013 Antonio de la Piedra

-- This program is free software: you can redistribute it and/or modify

-- it under the terms of the GNU General Public License as published by

-- the Free Software Foundation, either version 3 of the License, or

-- (at your option) any later version.

-- This program is distributed in the hope that it will be useful,

-- but WITHOUT ANY WARRANTY; without even the implied warranty of

-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

-- GNU General Public License for more details.

-- You should have received a copy of the GNU General Public License

-- along with this program.  If not, see <http://www.gnu.org/licenses/>.

LIBRARY ieee;

USE ieee.std_logic_1164.ALL;

ENTITY tb_des_loop IS

END tb_des_loop;

ARCHITECTURE behavior OF tb_des_loop IS

    -- Component Declaration for the Unit Under Test (UUT)

    COMPONENT des_loop

        port(clk :  in std_logic;

                  rst : in std_logic;

                  mode : in std_logic; -- 0 encrypt, 1 decrypt

                  key_in : in std_logic_vector(63 downto 0);

                  key_pre_w_in : in std_logic_vector(63 downto 0);

                  key_pos_w_in : in std_logic_vector(63 downto 0);

                  blk_in : in std_logic_vector(63 downto 0);

                  blk_out : out std_logic_vector(63 downto 0));

    END COMPONENT;

   --Inputs

   signal clk : std_logic := '0';

   signal rst : std_logic := '0';

   signal mode : std_logic := '0';

   signal key_in : std_logic_vector(63 downto 0) := (others => '0');

   signal blk_in : std_logic_vector(63 downto 0) := (others => '0');

        signal key_pre_w_in : std_logic_vector(63 downto 0);

        signal key_pos_w_in : std_logic_vector(63 downto 0);

        --Outputs

   signal blk_out : std_logic_vector(63 downto 0);

   -- Clock period definitions

   constant clk_period : time := 10 ns;

BEGIN

        -- Instantiate the Unit Under Test (UUT)

   uut: des_loop PORT MAP (

          clk => clk,

          rst => rst,

          mode => mode,

          key_in => key_in,

                         key_pre_w_in => key_pre_w_in,

                         key_pos_w_in => key_pos_w_in,

          blk_in => blk_in,

          blk_out => blk_out

        );

   -- Clock process definitions

   clk_process :process

   begin

                clk <= '0';

                wait for clk_period/2;

                clk <= '1';

                wait for clk_period/2;

   end process;

   -- Stimulus process

   stim_proc: process

   begin

                wait for clk_period/2 + clk_period;

                mode <= '0';

                blk_in <= X"4E45565251554954";

                key_in <= X"4B41534849534142";

                key_pre_w_in <= X"F0DE87C455F0247D";

                key_pos_w_in <= X"BC8E72E928DFDD66";

                rst <= '1';

                wait for clk_period;

                rst <= '0';

      wait for clk_period*16;

                assert blk_out = X"A937617ABB16ED28"

                        report "ENCRYPT ERROR" severity FAILURE;

                wait for clk_period;

                mode <= '1';

                blk_in <=  X"A937617ABB16ED28";

                key_in <=  X"4B41534849534142";

                key_pre_w_in <= X"F0DE87C455F0247D";

                key_pos_w_in <= X"BC8E72E928DFDD66";

                rst <= '1';

                wait for clk_period;

                rst <= '0';

      wait for clk_period*16;

                assert blk_out = X"4E45565251554954"

                        report "DECRYPT ERROR" severity FAILURE;

      wait;

   end process;

END;