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60 lines
2.1 KiB
60 lines
2.1 KiB
-- ======================================================================
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-- AES encryption/decryption
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-- package file with functions
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-- Copyright (C) 2011 Torsten Meissner
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-------------------------------------------------------------------------
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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-- ======================================================================
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-- Revision 0.1 2011/10/22
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-- Initial release
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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package aes_pkg is
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FUNCTION ip ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector;
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end package aes_pkg;
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package body aes_pkg is
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FUNCTION ip ( input_vector : std_logic_vector(0 TO 63) ) RETURN std_logic_vector IS
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TYPE matrix IS ARRAY (0 TO 63) OF natural RANGE 0 TO 63;
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VARIABLE table : matrix := (57, 49, 41, 33, 25, 17, 9, 1,
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59, 51, 43, 35, 27, 19, 11, 3,
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61, 53, 45, 37, 29, 21, 13, 5,
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63, 55, 47, 39, 31, 23, 15, 7,
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56, 48, 40, 32, 24, 16, 8, 0,
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58, 50, 42, 34, 26, 18, 10, 2,
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60, 52, 44, 36, 28, 20, 12, 4,
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62, 54, 46, 38, 30, 22, 14, 6);
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VARIABLE result : std_logic_vector(0 TO 63);
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BEGIN
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FOR index IN 0 TO 63 LOOP
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result( index ) := input_vector( table( index ) );
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END LOOP;
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RETURN result;
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END FUNCTION ip;
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end package body aes_pkg;
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