-- Copyright (C) 2015 Daniel Otte -- -- This program 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. -- -- This program 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 . with Ada.Text_IO; use Ada.Text_IO; -- with Ada.Integer_Text_IO; use Ada.Integer_Text_IO; package body AES is sbox : constant u8_Array(0 .. 255) := ( 16#63#, 16#7c#, 16#77#, 16#7b#, 16#f2#, 16#6b#, 16#6f#, 16#c5#, 16#30#, 16#01#, 16#67#, 16#2b#, 16#fe#, 16#d7#, 16#ab#, 16#76#, 16#ca#, 16#82#, 16#c9#, 16#7d#, 16#fa#, 16#59#, 16#47#, 16#f0#, 16#ad#, 16#d4#, 16#a2#, 16#af#, 16#9c#, 16#a4#, 16#72#, 16#c0#, 16#b7#, 16#fd#, 16#93#, 16#26#, 16#36#, 16#3f#, 16#f7#, 16#cc#, 16#34#, 16#a5#, 16#e5#, 16#f1#, 16#71#, 16#d8#, 16#31#, 16#15#, 16#04#, 16#c7#, 16#23#, 16#c3#, 16#18#, 16#96#, 16#05#, 16#9a#, 16#07#, 16#12#, 16#80#, 16#e2#, 16#eb#, 16#27#, 16#b2#, 16#75#, 16#09#, 16#83#, 16#2c#, 16#1a#, 16#1b#, 16#6e#, 16#5a#, 16#a0#, 16#52#, 16#3b#, 16#d6#, 16#b3#, 16#29#, 16#e3#, 16#2f#, 16#84#, 16#53#, 16#d1#, 16#00#, 16#ed#, 16#20#, 16#fc#, 16#b1#, 16#5b#, 16#6a#, 16#cb#, 16#be#, 16#39#, 16#4a#, 16#4c#, 16#58#, 16#cf#, 16#d0#, 16#ef#, 16#aa#, 16#fb#, 16#43#, 16#4d#, 16#33#, 16#85#, 16#45#, 16#f9#, 16#02#, 16#7f#, 16#50#, 16#3c#, 16#9f#, 16#a8#, 16#51#, 16#a3#, 16#40#, 16#8f#, 16#92#, 16#9d#, 16#38#, 16#f5#, 16#bc#, 16#b6#, 16#da#, 16#21#, 16#10#, 16#ff#, 16#f3#, 16#d2#, 16#cd#, 16#0c#, 16#13#, 16#ec#, 16#5f#, 16#97#, 16#44#, 16#17#, 16#c4#, 16#a7#, 16#7e#, 16#3d#, 16#64#, 16#5d#, 16#19#, 16#73#, 16#60#, 16#81#, 16#4f#, 16#dc#, 16#22#, 16#2a#, 16#90#, 16#88#, 16#46#, 16#ee#, 16#b8#, 16#14#, 16#de#, 16#5e#, 16#0b#, 16#db#, 16#e0#, 16#32#, 16#3a#, 16#0a#, 16#49#, 16#06#, 16#24#, 16#5c#, 16#c2#, 16#d3#, 16#ac#, 16#62#, 16#91#, 16#95#, 16#e4#, 16#79#, 16#e7#, 16#c8#, 16#37#, 16#6d#, 16#8d#, 16#d5#, 16#4e#, 16#a9#, 16#6c#, 16#56#, 16#f4#, 16#ea#, 16#65#, 16#7a#, 16#ae#, 16#08#, 16#ba#, 16#78#, 16#25#, 16#2e#, 16#1c#, 16#a6#, 16#b4#, 16#c6#, 16#e8#, 16#dd#, 16#74#, 16#1f#, 16#4b#, 16#bd#, 16#8b#, 16#8a#, 16#70#, 16#3e#, 16#b5#, 16#66#, 16#48#, 16#03#, 16#f6#, 16#0e#, 16#61#, 16#35#, 16#57#, 16#b9#, 16#86#, 16#c1#, 16#1d#, 16#9e#, 16#e1#, 16#f8#, 16#98#, 16#11#, 16#69#, 16#d9#, 16#8e#, 16#94#, 16#9b#, 16#1e#, 16#87#, 16#e9#, 16#ce#, 16#55#, 16#28#, 16#df#, 16#8c#, 16#a1#, 16#89#, 16#0d#, 16#bf#, 16#e6#, 16#42#, 16#68#, 16#41#, 16#99#, 16#2d#, 16#0f#, 16#b0#, 16#54#, 16#bb#, 16#16# ); rcon : constant u8_Array(1 .. 10) := ( 16#01#, 16#02#, 16#04#, 16#08#, 16#10#, 16#20#, 16#40#, 16#80#, 16#1b#, 16#36# ); procedure print_hex(value : in u8) is hex_table : constant array (0 .. 15) of Character := ( '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'); begin Put(hex_table(Integer(Shift_Right(value, 4)))); Put(hex_table(Integer(value and 16#F#))); end; procedure print_hex(value : in u8_Array) is begin for i in value'Range loop print_hex(value(i)); Put(" "); end loop; end; function gf256mul(a, b : u8) return u8 is r : u8 := 0; t1 : u8 := a; t2 : u8 := b; begin for i in 1 .. 8 loop if (t1 and 1) = 1 then r := r xor t2; end if; t1 := Shift_Right(t1, 1); if (t2 and 16#80#) = 16#80# then t2 := t2 xor polynom; end if; t2 := Shift_Left(t2, 1); end loop; return r; end gf256mul; function RotWord(A : u8_Array) return u8_Array is begin return Rotate_be(A, 8); end; function SubArray(A : u8_Array) return u8_Array is r : u8_Array(A'Range); begin for i in A'Range loop r(i) := sbox(Natural(A(i))); end loop; return r; end; function Initialize(Key : Key_128) return Context_128 is Ret : Context_128; w : u8_Array(1 .. Ret.Roundkeys'Length * RoundKey_T'Length); temp : u8_Array(1 .. 4); Nk : Constant := Key'Length / 4; k : Integer range rcon'First .. rcon'Last + 1 := 1; j : Integer range w'First .. w'Last + 1 := 1; begin New_Line; Put("== Debug =="); New_Line; w(1 .. Key'Length) := u8_Array(Key); for i in 1 + Key'Length / 4 .. Ret.RoundKeys'Length * RoundKey_T'Length / 4 loop temp := w((i - 1) * 4 - 3 .. (i - 1) * 4); print_hex(temp); if (i - 1) mod Nk = 0 then temp := SubArray(RotWord(temp)); Put(" - "); print_hex(temp); temp(1) := temp(1) xor rcon(k); k := k + 1; Put(" - "); print_hex(temp); end if; temp := temp xor w((i - Nk) * 4 - 3 .. (i - Nk) * 4); Put(" - "); print_hex(temp); w(i * 4 - 3 .. i * 4) := temp; New_Line; end loop; for i in Ret.RoundKeys'Range loop Ret.RoundKeys(i) := RoundKey_T(w(j .. j + RoundKey_T'Length - 1)); j := j + RoundKey_T'Length; end loop; return Ret; end Initialize; function Initialize(Key : Key_192) return Context_192 is Ret : Context_192; w : u8_Array(1 .. Ret.Roundkeys'Length * RoundKey_T'Length); temp : u8_Array(1 .. 4); Nk : Constant := Key'Length / 4; k : Integer range rcon'First .. rcon'Last + 1 := 1; j : Integer range w'First .. w'Last + 1 := 1; begin New_Line; Put("== Debug =="); New_Line; w(1 .. Key'Length) := u8_Array(Key); for i in 1 + Key'Length / 4 .. Ret.RoundKeys'Length * RoundKey_T'Length / 4 loop temp := w((i - 1) * 4 - 3 .. (i - 1) * 4); print_hex(temp); if (i - 1) mod Nk = 0 then temp := SubArray(RotWord(temp)); Put(" - "); print_hex(temp); temp(1) := temp(1) xor rcon(k); k := k + 1; Put(" - "); print_hex(temp); end if; temp := temp xor w((i - Nk) * 4 - 3 .. (i - Nk) * 4); Put(" - "); print_hex(temp); w(i * 4 - 3 .. i * 4) := temp; New_Line; end loop; for i in Ret.RoundKeys'Range loop Ret.RoundKeys(i) := RoundKey_T(w(j .. j + RoundKey_T'Length - 1)); j := j + RoundKey_T'Length; end loop; return Ret; end Initialize; function Initialize(Key : Key_256) return Context_256 is Ret : Context_256; w : u8_Array(1 .. Ret.Roundkeys'Length * RoundKey_T'Length); temp : u8_Array(1 .. 4); Nk : Constant := Key'Length / 4; k : Integer range rcon'First .. rcon'Last + 1 := 1; j : Integer range w'First .. w'Last + 1 := 1; begin New_Line; Put("== Debug =="); New_Line; w(1 .. Key'Length) := u8_Array(Key); for i in 1 + Key'Length / 4 .. Ret.RoundKeys'Length * RoundKey_T'Length / 4 loop temp := w((i - 1) * 4 - 3 .. (i - 1) * 4); print_hex(temp); if (i - 1) mod Nk = 0 then temp := SubArray(RotWord(temp)); Put(" - "); print_hex(temp); temp(1) := temp(1) xor rcon(k); k := k + 1; Put(" - "); print_hex(temp); else if Nk > 6 and then (i - 1) mod Nk = 4 then temp := SubArray(temp); end if; end if; temp := temp xor w((i - Nk) * 4 - 3 .. (i - Nk) * 4); Put(" - "); print_hex(temp); w(i * 4 - 3 .. i * 4) := temp; New_Line; end loop; for i in Ret.RoundKeys'Range loop Ret.RoundKeys(i) := RoundKey_T(w(j .. j + RoundKey_T'Length - 1)); j := j + RoundKey_T'Length; end loop; return Ret; end Initialize; -- function Encrypt(Ctx : Context_128; Source : Plaintext) return Ciphertext; -- function Decrypt(Ctx : Context_128; Source : Ciphertext) return Plaintext; -- -- function Initialize(Key : Key_192) return Context_192; -- function Encrypt(Ctx : Context_192; Source : Plaintext) return Ciphertext; -- function Decrypt(Ctx : Context_192; Source : Ciphertext) return Plaintext; -- -- function Initialize(Key : Key_256) return Context_256; -- function Encrypt(Ctx : Context_256; Source : Plaintext) return Ciphertext; -- function Decrypt(Ctx : Context_256; Source : Ciphertext) return Plaintext; end AES;