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dsocek |
---------------------------------------------------------------------
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-- (c) Copyright 2006, CoreTex Systems, LLC --
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-- www.coretexsys.com --
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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 SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY --
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED --
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-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS --
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-- FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR --
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-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, --
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-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES --
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-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE --
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-- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR --
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-- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
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-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT --
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT --
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-- OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE --
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-- POSSIBILITY OF SUCH DAMAGE. --
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-- --
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---------------------------------------------------------------------
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----------------------------------------------------------------------
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-- Poject structure:
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-- |- tdes_top.vhd
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-- |
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-- |- des_cipher_top.vhd
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-- |- des_top.vhd
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-- |- block_top.vhd
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-- |- add_key.vhd
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-- |
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-- |- add_left.vhd
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-- |
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-- |- e_expansion_function.vhd
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-- |
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-- |- p_box.vhd
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-- |
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-- |- s_box.vhd
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-- |- s1_box.vhd
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-- |- s2_box.vhd
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-- |- s3_box.vhd
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-- |- s4_box.vhd
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-- |- s5_box.vhd
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-- |- s6_box.vhd
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-- |- s7_box.vhd
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-- |- s8_box.vhd
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-- |- key_schedule.vhd
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----------------------------------------------------------------------
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---------------------------------------------------------------------------------------------------
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--
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-- Title : key_schedule
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-- Company : CoreTex Systems, LLC
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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.STD_LOGIC_ARITH.ALL;
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use IEEE.STD_LOGIC_UNSIGNED.ALL;
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entity key_schedule is
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port (
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key_in: in std_logic_vector(0 to 63); -- key to be expanded
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-- interface signals for communication with DES
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KeySelect: in std_logic_vector(3 downto 0); -- selector for key
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key_out: out std_logic_vector(0 to 47); -- expaned key output
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key_ready: out std_logic; -- signal for DES that key has been expanded
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reset: in std_logic; -- reset
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clock: in std_logic -- master clock
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);
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end key_schedule;
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architecture Behavioral of key_schedule is
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--
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-- Storage for expanded key
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--
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signal K16, K1: std_logic_vector(0 to 47);
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signal K2, K3: std_logic_vector(0 to 47);
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signal K4, K5: std_logic_vector(0 to 47);
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signal K6, K7: std_logic_vector(0 to 47);
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signal K8, K9: std_logic_vector(0 to 47);
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signal K10, K11: std_logic_vector(0 to 47);
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signal K12, K13: std_logic_vector(0 to 47);
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signal K14, K15: std_logic_vector(0 to 47);
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begin
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--
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-- Selector for expaned key
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--
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key_out <= K1 when KeySelect = x"0" else
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K2 when KeySelect = x"1" else
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K3 when KeySelect = x"2" else
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K4 when KeySelect = x"3" else
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K5 when KeySelect = x"4" else
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K6 when KeySelect = x"5" else
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K7 when KeySelect = x"6" else
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K8 when KeySelect = x"7" else
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K9 when KeySelect = x"8" else
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K10 when KeySelect = x"9" else
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K11 when KeySelect = x"A" else
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K12 when KeySelect = x"B" else
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K13 when KeySelect = x"C" else
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K14 when KeySelect = x"D" else
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K15 when KeySelect = x"E" else
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K16;
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process (clock)
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begin
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--
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-- input key will expaned and stored after rising edge of the first clock after mater reset.
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-- the keys are captured at a triple-des level
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--
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if rising_edge(clock) then
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if reset = '1' then
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key_ready <= '0';
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else
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--
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-- key expansion from the input key
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--
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K1 <= key_in(9) & key_in(50) & key_in(33) & key_in(59) & key_in(48) & key_in(16) & key_in(32) & key_in(56) &
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key_in(1) & key_in(8) & key_in(18) & key_in(41) & key_in(2) & key_in(34) & key_in(25) & key_in(24) &
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key_in(43) & key_in(57) & key_in(58) & key_in(0) & key_in(35) & key_in(26) & key_in(17) & key_in(40) &
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key_in(21) & key_in(27) & key_in(38) & key_in(53) & key_in(36) & key_in(3) & key_in(46) & key_in(29) &
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key_in(4) & key_in(52) & key_in(22) & key_in(28) & key_in(60) & key_in(20) & key_in(37) & key_in(62) &
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key_in(14) & key_in(19) & key_in(44) & key_in(13) & key_in(12) & key_in(61) & key_in(54) & key_in(30);
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K2 <= key_in(1) & key_in(42) & key_in(25) & key_in(51) & key_in(40) & key_in(8) & key_in(24) & key_in(48) &
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key_in(58) & key_in(0) & key_in(10) & key_in(33) & key_in(59) & key_in(26) & key_in(17) & key_in(16) &
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key_in(35) & key_in(49) & key_in(50) & key_in(57) & key_in(56) & key_in(18) & key_in(9) & key_in(32) &
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key_in(13) & key_in(19) & key_in(30) & key_in(45) & key_in(28) & key_in(62) & key_in(38) & key_in(21) &
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key_in(27) & key_in(44) & key_in(14) & key_in(20) & key_in(52) & key_in(12) & key_in(29) & key_in(54) &
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key_in(6) & key_in(11) & key_in(36) & key_in(5) & key_in(4) & key_in(53) & key_in(46) & key_in(22);
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K3 <= key_in(50) & key_in(26) & key_in(9) & key_in(35) & key_in(24) & key_in(57) & key_in(8) & key_in(32) &
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key_in(42) & key_in(49) & key_in(59) & key_in(17) & key_in(43) & key_in(10) & key_in(1) & key_in(0) &
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key_in(48) & key_in(33) & key_in(34) & key_in(41) & key_in(40) & key_in(2) & key_in(58) & key_in(16) &
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key_in(60) & key_in(3) & key_in(14) & key_in(29) & key_in(12) & key_in(46) & key_in(22) & key_in(5) &
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key_in(11) & key_in(28) & key_in(61) & key_in(4) & key_in(36) & key_in(27) & key_in(13) & key_in(38) &
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key_in(53) & key_in(62) & key_in(20) & key_in(52) & key_in(19) & key_in(37) & key_in(30) & key_in(6);
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K4 <= key_in(34) & key_in(10) & key_in(58) & key_in(48) & key_in(8) & key_in(41) & key_in(57) & key_in(16) &
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key_in(26) & key_in(33) & key_in(43) & key_in(1) & key_in(56) & key_in(59) & key_in(50) & key_in(49) &
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key_in(32) & key_in(17) & key_in(18) & key_in(25) & key_in(24) & key_in(51) & key_in(42) & key_in(0) &
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key_in(44) & key_in(54) & key_in(61) & key_in(13) & key_in(27) & key_in(30) & key_in(6) & key_in(52) &
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key_in(62) & key_in(12) & key_in(45) & key_in(19) & key_in(20) & key_in(11) & key_in(60) & key_in(22) &
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key_in(37) & key_in(46) & key_in(4) & key_in(36) & key_in(3) & key_in(21) & key_in(14) & key_in(53);
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K5 <= key_in(18) & key_in(59) & key_in(42) & key_in(32) & key_in(57) & key_in(25) & key_in(41) & key_in(0) &
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key_in(10) & key_in(17) & key_in(56) & key_in(50) & key_in(40) & key_in(43) & key_in(34) & key_in(33) &
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key_in(16) & key_in(1) & key_in(2) & key_in(9) & key_in(8) & key_in(35) & key_in(26) & key_in(49) &
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key_in(28) & key_in(38) & key_in(45) & key_in(60) & key_in(11) & key_in(14) & key_in(53) & key_in(36) &
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key_in(46) & key_in(27) & key_in(29) & key_in(3) & key_in(4) & key_in(62) & key_in(44) & key_in(6) &
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key_in(21) & key_in(30) & key_in(19) & key_in(20) & key_in(54) & key_in(5) & key_in(61) & key_in(37);
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K6 <= key_in(2) & key_in(43) & key_in(26) & key_in(16) & key_in(41) & key_in(9) & key_in(25) & key_in(49) &
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key_in(59) & key_in(1) & key_in(40) & key_in(34) & key_in(24) & key_in(56) & key_in(18) & key_in(17) &
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key_in(0) & key_in(50) & key_in(51) & key_in(58) & key_in(57) & key_in(48) & key_in(10) & key_in(33) &
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key_in(12) & key_in(22) & key_in(29) & key_in(44) & key_in(62) & key_in(61) & key_in(37) & key_in(20) &
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| 175 |
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key_in(30) & key_in(11) & key_in(13) & key_in(54) & key_in(19) & key_in(46) & key_in(28) & key_in(53) &
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| 176 |
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key_in(5) & key_in(14) & key_in(3) & key_in(4) & key_in(38) & key_in(52) & key_in(45) & key_in(21);
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K7 <= key_in(51) & key_in(56) & key_in(10) & key_in(0) & key_in(25) & key_in(58) & key_in(9) & key_in(33) &
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key_in(43) & key_in(50) & key_in(24) & key_in(18) & key_in(8) & key_in(40) & key_in(2) & key_in(1) &
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key_in(49) & key_in(34) & key_in(35) & key_in(42) & key_in(41) & key_in(32) & key_in(59) & key_in(17) &
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key_in(27) & key_in(6) & key_in(13) & key_in(28) & key_in(46) & key_in(45) & key_in(21) & key_in(4) &
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| 182 |
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key_in(14) & key_in(62) & key_in(60) & key_in(38) & key_in(3) & key_in(30) & key_in(12) & key_in(37) &
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key_in(52) & key_in(61) & key_in(54) & key_in(19) & key_in(22) & key_in(36) & key_in(29) & key_in(5);
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K8 <= key_in(35) & key_in(40) & key_in(59) & key_in(49) & key_in(9) & key_in(42) & key_in(58) & key_in(17) &
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| 186 |
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key_in(56) & key_in(34) & key_in(8) & key_in(2) & key_in(57) & key_in(24) & key_in(51) & key_in(50) &
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| 187 |
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key_in(33) & key_in(18) & key_in(48) & key_in(26) & key_in(25) & key_in(16) & key_in(43) & key_in(1) &
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| 188 |
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key_in(11) & key_in(53) & key_in(60) & key_in(12) & key_in(30) & key_in(29) & key_in(5) & key_in(19) &
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| 189 |
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key_in(61) & key_in(46) & key_in(44) & key_in(22) & key_in(54) & key_in(14) & key_in(27) & key_in(21) &
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| 190 |
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key_in(36) & key_in(45) & key_in(38) & key_in(3) & key_in(6) & key_in(20) & key_in(13) & key_in(52);
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| 191 |
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K9 <= key_in(56) & key_in(32) & key_in(51) & key_in(41) & key_in(1) & key_in(34) & key_in(50) & key_in(9) &
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| 193 |
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key_in(48) & key_in(26) & key_in(0) & key_in(59) & key_in(49) & key_in(16) & key_in(43) & key_in(42) &
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| 194 |
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key_in(25) & key_in(10) & key_in(40) & key_in(18) & key_in(17) & key_in(8) & key_in(35) & key_in(58) &
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| 195 |
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key_in(3) & key_in(45) & key_in(52) & key_in(4) & key_in(22) & key_in(21) & key_in(60) & key_in(11) &
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| 196 |
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key_in(53) & key_in(38) & key_in(36) & key_in(14) & key_in(46) & key_in(6) & key_in(19) & key_in(13) &
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| 197 |
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key_in(28) & key_in(37) & key_in(30) & key_in(62) & key_in(61) & key_in(12) & key_in(5) & key_in(44);
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| 198 |
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| 199 |
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K10 <= key_in(40) & key_in(16) & key_in(35) & key_in(25) & key_in(50) & key_in(18) & key_in(34) & key_in(58) &
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| 200 |
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key_in(32) & key_in(10) & key_in(49) & key_in(43) & key_in(33) & key_in(0) & key_in(56) & key_in(26) &
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| 201 |
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key_in(9) & key_in(59) & key_in(24) & key_in(2) & key_in(1) & key_in(57) & key_in(48) & key_in(42) &
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| 202 |
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key_in(54) & key_in(29) & key_in(36) & key_in(19) & key_in(6) & key_in(5) & key_in(44) & key_in(62) &
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| 203 |
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key_in(37) & key_in(22) & key_in(20) & key_in(61) & key_in(30) & key_in(53) & key_in(3) & key_in(60) &
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| 204 |
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key_in(12) & key_in(21) & key_in(14) & key_in(46) & key_in(45) & key_in(27) & key_in(52) & key_in(28);
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| 205 |
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K11 <= key_in(24) & key_in(0) & key_in(48) & key_in(9) & key_in(34) & key_in(2) & key_in(18) & key_in(42) &
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| 207 |
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key_in(16) & key_in(59) & key_in(33) & key_in(56) & key_in(17) & key_in(49) & key_in(40) & key_in(10) &
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| 208 |
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key_in(58) & key_in(43) & key_in(8) & key_in(51) & key_in(50) & key_in(41) & key_in(32) & key_in(26) &
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| 209 |
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key_in(38) & key_in(13) & key_in(20) & key_in(3) & key_in(53) & key_in(52) & key_in(28) & key_in(46) &
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| 210 |
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key_in(21) & key_in(6) & key_in(4) & key_in(45) & key_in(14) & key_in(37) & key_in(54) & key_in(44) &
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| 211 |
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key_in(27) & key_in(5) & key_in(61) & key_in(30) & key_in(29) & key_in(11) & key_in(36) & key_in(12);
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| 212 |
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| 213 |
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K12 <= key_in(8) & key_in(49) & key_in(32) & key_in(58) & key_in(18) & key_in(51) & key_in(2) & key_in(26) &
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| 214 |
|
|
key_in(0) & key_in(43) & key_in(17) & key_in(40) & key_in(1) & key_in(33) & key_in(24) & key_in(59) &
|
| 215 |
|
|
key_in(42) & key_in(56) & key_in(57) & key_in(35) & key_in(34) & key_in(25) & key_in(16) & key_in(10) &
|
| 216 |
|
|
key_in(22) & key_in(60) & key_in(4) & key_in(54) & key_in(37) & key_in(36) & key_in(12) & key_in(30) &
|
| 217 |
|
|
key_in(5) & key_in(53) & key_in(19) & key_in(29) & key_in(61) & key_in(21) & key_in(38) & key_in(28) &
|
| 218 |
|
|
key_in(11) & key_in(52) & key_in(45) & key_in(14) & key_in(13) & key_in(62) & key_in(20) & key_in(27);
|
| 219 |
|
|
|
| 220 |
|
|
K13 <= key_in(57) & key_in(33) & key_in(16) & key_in(42) & key_in(2) & key_in(35) & key_in(51) & key_in(10) &
|
| 221 |
|
|
key_in(49) & key_in(56) & key_in(1) & key_in(24) & key_in(50) & key_in(17) & key_in(8) & key_in(43) &
|
| 222 |
|
|
key_in(26) & key_in(40) & key_in(41) & key_in(48) & key_in(18) & key_in(9) & key_in(0) & key_in(59) &
|
| 223 |
|
|
key_in(6) & key_in(44) & key_in(19) & key_in(38) & key_in(21) & key_in(20) & key_in(27) & key_in(14) &
|
| 224 |
|
|
key_in(52) & key_in(37) & key_in(3) & key_in(13) & key_in(45) & key_in(5) & key_in(22) & key_in(12) &
|
| 225 |
|
|
key_in(62) & key_in(36) & key_in(29) & key_in(61) & key_in(60) & key_in(46) & key_in(4) & key_in(11);
|
| 226 |
|
|
|
| 227 |
|
|
K14 <= key_in(41) & key_in(17) & key_in(0) & key_in(26) & key_in(51) & key_in(48) & key_in(35) & key_in(59) &
|
| 228 |
|
|
key_in(33) & key_in(40) & key_in(50) & key_in(8) & key_in(34) & key_in(1) & key_in(57) & key_in(56) &
|
| 229 |
|
|
key_in(10) & key_in(24) & key_in(25) & key_in(32) & key_in(2) & key_in(58) & key_in(49) & key_in(43) &
|
| 230 |
|
|
key_in(53) & key_in(28) & key_in(3) & key_in(22) & key_in(5) & key_in(4) & key_in(11) & key_in(61) &
|
| 231 |
|
|
key_in(36) & key_in(21) & key_in(54) & key_in(60) & key_in(29) & key_in(52) & key_in(6) & key_in(27) &
|
| 232 |
|
|
key_in(46) & key_in(20) & key_in(13) & key_in(45) & key_in(44) & key_in(30) & key_in(19) & key_in(62);
|
| 233 |
|
|
|
| 234 |
|
|
K15 <= key_in(25) & key_in(1) & key_in(49) & key_in(10) & key_in(35) & key_in(32) & key_in(48) & key_in(43) &
|
| 235 |
|
|
key_in(17) & key_in(24) & key_in(34) & key_in(57) & key_in(18) & key_in(50) & key_in(41) & key_in(40) &
|
| 236 |
|
|
key_in(59) & key_in(8) & key_in(9) & key_in(16) & key_in(51) & key_in(42) & key_in(33) & key_in(56) &
|
| 237 |
|
|
key_in(37) & key_in(12) & key_in(54) & key_in(6) & key_in(52) & key_in(19) & key_in(62) & key_in(45) &
|
| 238 |
|
|
key_in(20) & key_in(5) & key_in(38) & key_in(44) & key_in(13) & key_in(36) & key_in(53) & key_in(11) &
|
| 239 |
|
|
key_in(30) & key_in(4) & key_in(60) & key_in(29) & key_in(28) & key_in(14) & key_in(3) & key_in(46);
|
| 240 |
|
|
|
| 241 |
|
|
K16 <= key_in(17) & key_in(58) & key_in(41) & key_in(2) & key_in(56) & key_in(24) & key_in(40) & key_in(35) &
|
| 242 |
|
|
key_in(9) & key_in(16) & key_in(26) & key_in(49) & key_in(10) & key_in(42) & key_in(33) & key_in(32) &
|
| 243 |
|
|
key_in(51) & key_in(0) & key_in(1) & key_in(8) & key_in(43) & key_in(34) & key_in(25) & key_in(48) &
|
| 244 |
|
|
key_in(29) & key_in(4) & key_in(46) & key_in(61) & key_in(44) & key_in(11) & key_in(54) & key_in(37) &
|
| 245 |
|
|
key_in(12) & key_in(60) & key_in(30) & key_in(36) & key_in(5) & key_in(28) & key_in(45) & key_in(3) &
|
| 246 |
|
|
key_in(22) & key_in(27) & key_in(52) & key_in(21) & key_in(20) & key_in(6) & key_in(62) & key_in(38);
|
| 247 |
|
|
|
| 248 |
|
|
key_ready <= '1';
|
| 249 |
|
|
|
| 250 |
|
|
end if;
|
| 251 |
|
|
|
| 252 |
|
|
end if;
|
| 253 |
|
|
end process;
|
| 254 |
|
|
|
| 255 |
|
|
|
| 256 |
|
|
end Behavioral;
|
