des算法使用vhdl硬件语言实现

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1、实用标准文案libraryieee;useieee.std_logic_1164.all;useieee.std_logic_arith.all;useieee.std_logic_unsigned.all;packagedes_libiscomponentdesport(clk:instd_logic;reset:instd_logic;encrypt:instd_logic;key_in:instd_logic_vector(55downto0);din:instd_logic_vector(63downto0);din_valid:instd_

2、logic;busy:bufferstd_logic;dout:outstd_logic_vector(63downto0);dout_valid:outstd_logic);endcomponent;componentdes_roundport(clk:instd_logic;reset:instd_logic;stall:instd_logic;encrypt_in:instd_logic;encrypt_shift:instd_logic_vector(4downto0);decrypt_shift:instd_logic_vector(4do

3、wnto0);key_in:instd_logic_vector(55downto0);din:instd_logic_vector(63downto0);din_valid:instd_logic;encrypt_out:outstd_logic;key_out:outstd_logic_vector(55downto0);dout:outstd_logic_vector(63downto0);dout_valid:outstd_logic);endcomponent;--Initalpermutationfunctiondes_ip(din:st

4、d_logic_vector(63downto0))returnstd_logic_vector;--Finalpermutationfunctiondes_fp(din:std_logic_vector(63downto0))returnstd_logic_vector;--Keypermutation,convertsa64bitkeyintoa56bitkey,ignoringparityfunctiondes_kp(din:std_logic_vector(63downto0))returnstd_logic_vector;--Compres

5、sionPermutation,convertsa56bitkeyintoa48bits.functiondes_cp(din:std_logic_vector(55downto0))returnstd_logic_vector;--Expansionpermutation精彩文档实用标准文案functiondes_ep(din:std_logic_vector(31downto0))returnstd_logic_vector;--S-BoxSubstitution,48bitsin,32bitsout.functiondes_sbox(din:s

6、td_logic_vector(47downto0))returnstd_logic_vector;--P-BoxPermutationfunctiondes_pbox(din:std_logic_vector(31downto0))returnstd_logic_vector;--KeyShiftfunctiondes_keyshift(din:std_logic_vector(55downto0);n:std_logic_vector(4downto0))returnstd_logic_vector;enddes_lib;------------

7、----------------------------------------------------------------libraryieee;useieee.std_logic_1164.all;useieee.std_logic_arith.all;useieee.std_logic_unsigned.all;librarywork;usework.des_lib.all;packagebodydes_libis----------------------------------------------------------Inital

8、permutationfunctiondes_ip(din:std_logic_vector(63downt