aes-decrypt.c

/* aes-decrypt.c
 *
 * Decryption function for aes/rijndael block cipher.
 */

/* nettle, low-level cryptographics library
 *
 * Copyright (C) 2002 Niels Mller
 *  
 * The nettle library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 * 
 * The nettle library 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 Lesser General Public
 * License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with the nettle library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include <assert.h>

#include "aes-internal.h"

static const struct aes_table
_aes_decrypt_table =
  { /* isbox */
    {
      0x52,0x09,0x6a,0xd5,0x30,0x36,0xa5,0x38,
      0xbf,0x40,0xa3,0x9e,0x81,0xf3,0xd7,0xfb,
      0x7c,0xe3,0x39,0x82,0x9b,0x2f,0xff,0x87,
      0x34,0x8e,0x43,0x44,0xc4,0xde,0xe9,0xcb,
      0x54,0x7b,0x94,0x32,0xa6,0xc2,0x23,0x3d,
      0xee,0x4c,0x95,0x0b,0x42,0xfa,0xc3,0x4e,
      0x08,0x2e,0xa1,0x66,0x28,0xd9,0x24,0xb2,
      0x76,0x5b,0xa2,0x49,0x6d,0x8b,0xd1,0x25,
      0x72,0xf8,0xf6,0x64,0x86,0x68,0x98,0x16,
      0xd4,0xa4,0x5c,0xcc,0x5d,0x65,0xb6,0x92,
      0x6c,0x70,0x48,0x50,0xfd,0xed,0xb9,0xda,
      0x5e,0x15,0x46,0x57,0xa7,0x8d,0x9d,0x84,
      0x90,0xd8,0xab,0x00,0x8c,0xbc,0xd3,0x0a,
      0xf7,0xe4,0x58,0x05,0xb8,0xb3,0x45,0x06,
      0xd0,0x2c,0x1e,0x8f,0xca,0x3f,0x0f,0x02,
      0xc1,0xaf,0xbd,0x03,0x01,0x13,0x8a,0x6b,
      0x3a,0x91,0x11,0x41,0x4f,0x67,0xdc,0xea,
      0x97,0xf2,0xcf,0xce,0xf0,0xb4,0xe6,0x73,
      0x96,0xac,0x74,0x22,0xe7,0xad,0x35,0x85,
      0xe2,0xf9,0x37,0xe8,0x1c,0x75,0xdf,0x6e,
      0x47,0xf1,0x1a,0x71,0x1d,0x29,0xc5,0x89,
      0x6f,0xb7,0x62,0x0e,0xaa,0x18,0xbe,0x1b,
      0xfc,0x56,0x3e,0x4b,0xc6,0xd2,0x79,0x20,
      0x9a,0xdb,0xc0,0xfe,0x78,0xcd,0x5a,0xf4,
      0x1f,0xdd,0xa8,0x33,0x88,0x07,0xc7,0x31,
      0xb1,0x12,0x10,0x59,0x27,0x80,0xec,0x5f,
      0x60,0x51,0x7f,0xa9,0x19,0xb5,0x4a,0x0d,
      0x2d,0xe5,0x7a,0x9f,0x93,0xc9,0x9c,0xef,
      0xa0,0xe0,0x3b,0x4d,0xae,0x2a,0xf5,0xb0,
      0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61,
      0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,
      0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d,
    },