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- -- ======================================================================
- -- AES encryption/decryption
- -- package file with functions
- -- Copyright (C) 2011 Torsten Meissner
- -------------------------------------------------------------------------
- -- 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 2 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, write to the Free Software
- -- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- -- ======================================================================
-
-
- -- Revision 0.1 2011/10/22
- -- Initial release
-
-
-
- library ieee;
- use ieee.std_logic_1164.all;
- use ieee.numeric_std.all;
-
-
- package aes_pkg is
-
- FUNCTION ip ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector;
-
- end package aes_pkg;
-
-
- package body aes_pkg is
-
- FUNCTION ip ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
- TYPE matrix IS ARRAY (0 TO 63) OF natural RANGE 0 TO 63;
- VARIABLE table : matrix := (57, 49, 41, 33, 25, 17, 9, 1,
- 59, 51, 43, 35, 27, 19, 11, 3,
- 61, 53, 45, 37, 29, 21, 13, 5,
- 63, 55, 47, 39, 31, 23, 15, 7,
- 56, 48, 40, 32, 24, 16, 8, 0,
- 58, 50, 42, 34, 26, 18, 10, 2,
- 60, 52, 44, 36, 28, 20, 12, 4,
- 62, 54, 46, 38, 30, 22, 14, 6);
- VARIABLE result : std_logic_vector(0 TO 63);
- BEGIN
- FOR index IN 0 TO 63 LOOP
- result( index ) := input_vector( table( index ) );
- END LOOP;
- RETURN result;
- END FUNCTION ip;
-
-
- end package body aes_pkg;
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