Subversion Repositories camellia-vhdl

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-- Designer:      Paolo Fulgoni <pfulgoni@opencores.org>

--

-- Create Date:   09/14/2007

-- Last Update:   04/14/2008

-- Project Name:  camellia-vhdl

-- Description:   Dual-port SBOX4

--

-- Copyright (C) 2007  Paolo Fulgoni

-- This file is part of camellia-vhdl.

-- camellia-vhdl 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.

-- camellia-vhdl 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/>.

--

-- The Camellia cipher algorithm is 128 bit cipher developed by NTT and

-- Mitsubishi Electric researchers.

-- http://info.isl.ntt.co.jp/crypt/eng/camellia/

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library IEEE;

use IEEE.std_logic_1164.all;

entity SBOX4 is

    port  (

                clk   : IN  STD_LOGIC;

            addra : IN  STD_LOGIC_VECTOR(0 to 7);

            addrb : IN  STD_LOGIC_VECTOR(0 to 7);

            douta : OUT STD_LOGIC_VECTOR(0 to 7);

            doutb : OUT STD_LOGIC_VECTOR(0 to 7)

            );

end SBOX4;

architecture RTL of SBOX4 is

    component SBOX1 is

        port  (

                clk   : IN  STD_LOGIC;

                addra : IN  STD_LOGIC_VECTOR(0 to 7);

                addrb : IN  STD_LOGIC_VECTOR(0 to 7);

                douta : OUT STD_LOGIC_VECTOR(0 to 7);

                doutb : OUT STD_LOGIC_VECTOR(0 to 7)

                );

    end component;

    -- SBOX1 signals

    signal s1_addra : STD_LOGIC_VECTOR(0 to 7);

    signal s1_addrb : STD_LOGIC_VECTOR(0 to 7);

    signal s1_clk  : STD_LOGIC;

    signal s1_douta : STD_LOGIC_VECTOR(0 to 7);

    signal s1_doutb : STD_LOGIC_VECTOR(0 to 7);

begin

    S1 : SBOX1

        port map(s1_clk, s1_addra, s1_addrb, s1_douta, s1_doutb);

    s1_clk   <= clk;

    s1_addra <= addra(1 to 7) & addra(0);

    s1_addrb <= addrb(1 to 7) & addrb(0);

    douta <= s1_douta;

    doutb <= s1_doutb;

end RTL;