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library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
 
entity invsbox is
  port (
  di : in  bit_vector (07 downto 00);
  do : out bit_vector (07 downto 00)
  );
end invsbox;
 
architecture phy of invsbox is
begin
  with di(07 downto 00) select
  do <=
  -- start invsbox
  X"52" when X"00", X"09" when X"01", X"6a" when X"02", X"d5" when X"03",
  X"30" when X"04", X"36" when X"05", X"a5" when X"06", X"38" when X"07",
  X"bf" when X"08", X"40" when X"09", X"a3" when X"0a", X"9e" when X"0b",
  X"81" when X"0c", X"f3" when X"0d", X"d7" when X"0e", X"fb" when X"0f",
 
  X"7c" when X"10", X"e3" when X"11", X"39" when X"12", X"82" when X"13",
  X"9b" when X"14", X"2f" when X"15", X"ff" when X"16", X"87" when X"17",
  X"34" when X"18", X"8e" when X"19", X"43" when X"1a", X"44" when X"1b",
  X"c4" when X"1c", X"de" when X"1d", X"e9" when X"1e", X"cb" when X"1f",
 
  X"54" when X"20", X"7b" when X"21", X"94" when X"22", X"32" when X"23",
  X"a6" when X"24", X"c2" when X"25", X"23" when X"26", X"3d" when X"27",
  X"ee" when X"28", X"4c" when X"29", X"95" when X"2a", X"0b" when X"2b",
  X"42" when X"2c", X"fa" when X"2d", X"c3" when X"2e", X"4e" when X"2f",
 
  X"08" when X"30", X"2e" when X"31", X"a1" when X"32", X"66" when X"33",
  X"28" when X"34", X"d9" when X"35", X"24" when X"36", X"b2" when X"37",
  X"76" when X"38", X"5b" when X"39", X"a2" when X"3a", X"49" when X"3b",
  X"6d" when X"3c", X"8b" when X"3d", X"d1" when X"3e", X"25" when X"3f",
 
  X"72" when X"40", X"f8" when X"41", X"f6" when X"42", X"64" when X"43",
  X"86" when X"44", X"68" when X"45", X"98" when X"46", X"16" when X"47",
  X"d4" when X"48", X"a4" when X"49", X"5c" when X"4a", X"cc" when X"4b",
  X"5d" when X"4c", X"65" when X"4d", X"b6" when X"4e", X"92" when X"4f",
 
  X"6c" when X"50", X"70" when X"51", X"48" when X"52", X"50" when X"53",
  X"fd" when X"54", X"ed" when X"55", X"b9" when X"56", X"da" when X"57",
  X"5e" when X"58", X"15" when X"59", X"46" when X"5a", X"57" when X"5b",
  X"a7" when X"5c", X"8d" when X"5d", X"9d" when X"5e", X"84" when X"5f",
 
  X"90" when X"60", X"d8" when X"61", X"ab" when X"62", X"00" when X"63",
  X"8c" when X"64", X"bc" when X"65", X"d3" when X"66", X"0a" when X"67",
  X"f7" when X"68", X"e4" when X"69", X"58" when X"6a", X"05" when X"6b",
  X"b8" when X"6c", X"b3" when X"6d", X"45" when X"6e", X"06" when X"6f",
 
  X"d0" when X"70", X"2c" when X"71", X"1e" when X"72", X"8f" when X"73",
  X"ca" when X"74", X"3f" when X"75", X"0f" when X"76", X"02" when X"77",
  X"c1" when X"78", X"af" when X"79", X"bd" when X"7a", X"03" when X"7b",
  X"01" when X"7c", X"13" when X"7d", X"8a" when X"7e", X"6b" when X"7f",
 
  X"3a" when X"80", X"91" when X"81", X"11" when X"82", X"41" when X"83",
  X"4f" when X"84", X"67" when X"85", X"dc" when X"86", X"ea" when X"87",
  X"97" when X"88", X"f2" when X"89", X"cf" when X"8a", X"ce" when X"8b",
  X"f0" when X"8c", X"b4" when X"8d", X"e6" when X"8e", X"73" when X"8f",
 
  X"96" when X"90", X"ac" when X"91", X"74" when X"92", X"22" when X"93",
  X"e7" when X"94", X"ad" when X"95", X"35" when X"96", X"85" when X"97",
  X"e2" when X"98", X"f9" when X"99", X"37" when X"9a", X"e8" when X"9b",
  X"1c" when X"9c", X"75" when X"9d", X"df" when X"9e", X"6e" when X"9f",
 
  X"47" when X"a0", X"f1" when X"a1", X"1a" when X"a2", X"71" when X"a3",
  X"1d" when X"a4", X"29" when X"a5", X"c5" when X"a6", X"89" when X"a7",
  X"6f" when X"a8", X"b7" when X"a9", X"62" when X"aa", X"0e" when X"ab",
  X"aa" when X"ac", X"18" when X"ad", X"be" when X"ae", X"1b" when X"af",
 
  X"fc" when X"b0", X"56" when X"b1", X"3e" when X"b2", X"4b" when X"b3",
  X"c6" when X"b4", X"d2" when X"b5", X"79" when X"b6", X"20" when X"b7",
  X"9a" when X"b8", X"db" when X"b9", X"c0" when X"ba", X"fe" when X"bb",
  X"78" when X"bc", X"cd" when X"bd", X"5a" when X"be", X"f4" when X"bf",
 
  X"1f" when X"c0", X"dd" when X"c1", X"a8" when X"c2", X"33" when X"c3",
  X"88" when X"c4", X"07" when X"c5", X"c7" when X"c6", X"31" when X"c7",
  X"b1" when X"c8", X"12" when X"c9", X"10" when X"ca", X"59" when X"cb",
  X"27" when X"cc", X"80" when X"cd", X"ec" when X"ce", X"5f" when X"cf",
 
  X"60" when X"d0", X"51" when X"d1", X"7f" when X"d2", X"a9" when X"d3",
  X"19" when X"d4", X"b5" when X"d5", X"4a" when X"d6", X"0d" when X"d7",
  X"2d" when X"d8", X"e5" when X"d9", X"7a" when X"da", X"9f" when X"db",
  X"93" when X"dc", X"c9" when X"dd", X"9c" when X"de", X"ef" when X"df",
 
  X"a0" when X"e0", X"e0" when X"e1", X"3b" when X"e2", X"4d" when X"e3",
  X"ae" when X"e4", X"2a" when X"e5", X"f5" when X"e6", X"b0" when X"e7",
  X"c8" when X"e8", X"eb" when X"e9", X"bb" when X"ea", X"3c" when X"eb",
  X"83" when X"ec", X"53" when X"ed", X"99" when X"ee", X"61" when X"ef",
 
  X"17" when X"f0", X"2b" when X"f1", X"04" when X"f2", X"7e" when X"f3",
  X"ba" when X"f4", X"77" when X"f5", X"d6" when X"f6", X"26" when X"f7",
  X"e1" when X"f8", X"69" when X"f9", X"14" when X"fa", X"63" when X"fb",
  X"55" when X"fc", X"21" when X"fd", X"0c" when X"fe", X"7d" when X"ff",
 
  -- end invsbox
  X"00" when others;
end phy;