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KeyContainer.vhd
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library ieee ;
use ieee.std_logic_1164.all ;
use ieee.numeric_std.all ;
entity KeyContainer is
port (
clock, load, decryption: IN STD_LOGIC;
key1In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key2In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key3In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key4In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key5In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key6In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key7In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key8In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key9In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key10In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key11In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key12In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key13In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key14In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key15In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
key16In : IN STD_LOGIC_VECTOR(47 DOWNTO 0);
keyOut : OUT STD_LOGIC_VECTOR(47 DOWNTO 0)
) ;
end entity ; -- KeyContainer
architecture arch of KeyContainer is
signal sr1Out, sr2Out, sr3Out, sr4Out, sr5Out, sr6Out, sr7Out, sr8Out, sr9Out,
sr10Out, sr11Out, sr12Out, sr13Out, sr14Out, sr15Out, sr16Out, sr17Out,
sr18Out, sr19Out, sr20Out, sr21Out, sr22Out, sr23Out, sr24Out, sr25Out,
sr26Out, sr27Out, sr28Out, sr29Out, sr30Out,
sr31Out: STD_LOGIC_VECTOR(47 DOWNTO 0);
begin
process(clock, load, decryption)
begin
if (clock'EVENT AND clock='1' AND load='1' AND decryption='0') then
sr1Out <= key1in;
sr2Out <= key1in;
sr3Out <= key2in;
sr4Out <= key2in;
sr5Out <= key3in;
sr6Out <= key3in;
sr7Out <= key4in;
sr8Out <= key4in;
sr9Out <= key5in;
sr10Out <= key5in;
sr11Out <= key6in;
sr12Out <= key6in;
sr13Out <= key7in;
sr14Out <= key7in;
sr15Out <= key8in;
sr16Out <= key8in;
sr17Out <= key9in;
sr18Out <= key9in;
sr19Out <= key10in;
sr20Out <= key10in;
sr21Out <= key11in;
sr22Out <= key11in;
sr23Out <= key12in;
sr24Out <= key12in;
sr25Out <= key13in;
sr26Out <= key13in;
sr27Out <= key14in;
sr28Out <= key14in;
sr29Out <= key15in;
sr30Out <= key15in;
sr31Out <= key16in;
keyOut <= sr1Out;
elsif (clock'EVENT AND clock='1' AND load='1' AND decryption='1') then
sr31Out => key16in
sr30Out => key15in
sr29Out => key15in
sr28Out => key14in
sr27Out => key14in
sr26Out => key13in
sr25Out => key13in
sr24Out => key12in
sr23Out => key12in
sr22Out => key11in
sr21Out => key11in
sr20Out => key10in
sr19Out => key10in
sr18Out => key9in
sr17Out => key9in
sr16Out => key8in
sr15Out => key8in
sr14Out => key7in
sr13Out => key7in
sr12Out => key6in
sr11Out => key6in
sr10Out => key5in
sr9Out => key5in
sr8Out => key4in
sr7Out => key4in
sr6Out => key3in
sr5Out => key3in
sr4Out => key2in
sr3Out => key2in
sr2Out => key1in
sr1Out => key1in
keyOut <= sr1Out;
elsif (clock'EVENT AND clock='1' AND load='0') then
sr1Out <= sr2Out;
sr2Out <= sr3Out;
sr3Out <= sr4Out;
sr4Out <= sr5Out;
sr5Out <= sr6Out;
sr6Out <= sr7Out;
sr7Out <= sr8Out;
sr8Out <= sr9Out;
sr9Out <= sr10Out;
sr10Out <= sr11Out;
sr11Out <= sr12Out;
sr12Out <= sr13Out;
sr13Out <= sr14Out;
sr14Out <= sr15Out;
sr15Out <= sr16Out;
sr16Out <= sr17Out;
sr17Out <= sr18Out;
sr18Out <= sr19Out;
sr19Out <= sr20Out;
sr20Out <= sr21Out;
sr21Out <= sr22Out;
sr22Out <= sr23Out;
sr23Out <= sr24Out;
sr24Out <= sr25Out;
sr25Out <= sr26Out;
sr26Out <= sr27Out;
sr27Out <= sr28Out;
sr28Out <= sr29Out;
sr29Out <= sr30Out;
sr30Out <= sr31Out;
keyOut <= sr1Out;
end if;
end process;
end architecture ; -- arch