-/*

- ---------------------------------------------------------------------------

- Copyright (c) 1998-2006, Brian Gladman, Worcester, UK. All rights reserved.

-

- LICENSE TERMS

-

- The free distribution and use of this software is allowed (with or without

- changes) provided that:

-

- 1. source code distributions include the above copyright notice, this

- list of conditions and the following disclaimer;

-

- 2. binary distributions include the above copyright notice, this list

- of conditions and the following disclaimer in their documentation;

-

- 3. the name of the copyright holder is not used to endorse products

- built using this software without specific written permission.

-

- DISCLAIMER

-

- This software is provided 'as is' with no explicit or implied warranties

- in respect of its properties, including, but not limited to, correctness

- and/or fitness for purpose.

- ---------------------------------------------------------------------------

- Issue 09/09/2006

-

- This is an AES implementation that uses only 8-bit byte operations on the

- cipher state (there are options to use 32-bit types if available).

-

- The combination of mix columns and byte substitution used here is based on

- that developed by Karl Malbrain. His contribution is acknowledged.

- */

-

-/* Adapted for TrueCrypt:

- - Macro-generated tables were replaced with static data to enable compiling

- with MSVC++ 1.5 which runs out of resources when expanding large macros.

-*/

-

-#pragma optimize ("t", on)

-

-/* define if you have a fast memcpy function on your system */

-#if 1

-# define HAVE_MEMCPY

-# include <string.h>

-# if defined( _MSC_VER )

-# ifndef DEBUG

-# pragma intrinsic( memcpy )

-# endif

-# endif

-#endif

-

-/* define if you have fast 32-bit types on your system */

-#if 1

-# define HAVE_UINT_32T

-#endif

-

-/* alternative versions (test for performance on your system) */

-#if 0

-# define VERSION_1

-#endif

-

-#include "AesSmall.h"

-

-#define WPOLY 0x011b

-#define DPOLY 0x008d

-#define f1(x) (x)

-#define f2(x) ((x<<1) ^ (((x>>7) & 1) * WPOLY))

-#define f4(x) ((x<<2) ^ (((x>>6) & 1) * WPOLY) ^ (((x>>6) & 2) * WPOLY))

-#define f8(x) ((x<<3) ^ (((x>>5) & 1) * WPOLY) ^ (((x>>5) & 2) * WPOLY) \

- ^ (((x>>5) & 4) * WPOLY))

-#define d2(x) (((x) >> 1) ^ ((x) & 1 ? DPOLY : 0))

-

-#define f3(x) (f2(x) ^ x)

-#define f9(x) (f8(x) ^ x)

-#define fb(x) (f8(x) ^ f2(x) ^ x)

-#define fd(x) (f8(x) ^ f4(x) ^ x)

-#define fe(x) (f8(x) ^ f4(x) ^ f2(x))

-

-static const uint_8t s_box[256] = {

- 0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,

- 0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76,

- 0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,

- 0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0,

- 0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,

- 0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15,

- 0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,

- 0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75,

- 0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,

- 0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84,

- 0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,

- 0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf,

- 0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,

- 0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8,

- 0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,

- 0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2,

- 0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,

- 0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73,

- 0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,

- 0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb,

- 0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,

- 0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79,

- 0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,

- 0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08,

- 0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,

- 0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a,

- 0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,

- 0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e,

- 0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,

- 0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf,

- 0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,

- 0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16

-};

-

-static const uint_8t inv_s_box[256] = {

- 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

-};

-

-static const uint_8t gfm2_s_box[256] = {

- 0xc6,0xf8,0xee,0xf6,0xff,0xd6,0xde,0x91,

- 0x60,0x02,0xce,0x56,0xe7,0xb5,0x4d,0xec,

- 0x8f,0x1f,0x89,0xfa,0xef,0xb2,0x8e,0xfb,

- 0x41,0xb3,0x5f,0x45,0x23,0x53,0xe4,0x9b,

- 0x75,0xe1,0x3d,0x4c,0x6c,0x7e,0xf5,0x83,

- 0x68,0x51,0xd1,0xf9,0xe2,0xab,0x62,0x2a,

- 0x08,0x95,0x46,0x9d,0x30,0x37,0x0a,0x2f,

- 0x0e,0x24,0x1b,0xdf,0xcd,0x4e,0x7f,0xea,

- 0x12,0x1d,0x58,0x34,0x36,0xdc,0xb4,0x5b,

- 0xa4,0x76,0xb7,0x7d,0x52,0xdd,0x5e,0x13,

- 0xa6,0xb9,0x00,0xc1,0x40,0xe3,0x79,0xb6,

- 0xd4,0x8d,0x67,0x72,0x94,0x98,0xb0,0x85,

- 0xbb,0xc5,0x4f,0xed,0x86,0x9a,0x66,0x11,

- 0x8a,0xe9,0x04,0xfe,0xa0,0x78,0x25,0x4b,

- 0xa2,0x5d,0x80,0x05,0x3f,0x21,0x70,0xf1,

- 0x63,0x77,0xaf,0x42,0x20,0xe5,0xfd,0xbf,

- 0x81,0x18,0x26,0xc3,0xbe,0x35,0x88,0x2e,

- 0x93,0x55,0xfc,0x7a,0xc8,0xba,0x32,0xe6,

- 0xc0,0x19,0x9e,0xa3,0x44,0x54,0x3b,0x0b,

- 0x8c,0xc7,0x6b,0x28,0xa7,0xbc,0x16,0xad,

- 0xdb,0x64,0x74,0x14,0x92,0x0c,0x48,0xb8,

- 0x9f,0xbd,0x43,0xc4,0x39,0x31,0xd3,0xf2,

- 0xd5,0x8b,0x6e,0xda,0x01,0xb1,0x9c,0x49,

- 0xd8,0xac,0xf3,0xcf,0xca,0xf4,0x47,0x10,

- 0x6f,0xf0,0x4a,0x5c,0x38,0x57,0x73,0x97,

- 0xcb,0xa1,0xe8,0x3e,0x96,0x61,0x0d,0x0f,

- 0xe0,0x7c,0x71,0xcc,0x90,0x06,0xf7,0x1c,

- 0xc2,0x6a,0xae,0x69,0x17,0x99,0x3a,0x27,

- 0xd9,0xeb,0x2b,0x22,0xd2,0xa9,0x07,0x33,

- 0x2d,0x3c,0x15,0xc9,0x87,0xaa,0x50,0xa5,

- 0x03,0x59,0x09,0x1a,0x65,0xd7,0x84,0xd0,

- 0x82,0x29,0x5a,0x1e,0x7b,0xa8,0x6d,0x2c

-};

-

-static const uint_8t gfm3_s_box[256] = {

- 0xa5,0x84,0x99,0x8d,0x0d,0xbd,0xb1,0x54,

- 0x50,0x03,0xa9,0x7d,0x19,0x62,0xe6,0x9a,

- 0x45,0x9d,0x40,0x87,0x15,0xeb,0xc9,0x0b,

- 0xec,0x67,0xfd,0xea,0xbf,0xf7,0x96,0x5b,

- 0xc2,0x1c,0xae,0x6a,0x5a,0x41,0x02,0x4f,

- 0x5c,0xf4,0x34,0x08,0x93,0x73,0x53,0x3f,

- 0x0c,0x52,0x65,0x5e,0x28,0xa1,0x0f,0xb5,

- 0x09,0x36,0x9b,0x3d,0x26,0x69,0xcd,0x9f,

- 0x1b,0x9e,0x74,0x2e,0x2d,0xb2,0xee,0xfb,

- 0xf6,0x4d,0x61,0xce,0x7b,0x3e,0x71,0x97,

- 0xf5,0x68,0x00,0x2c,0x60,0x1f,0xc8,0xed,

- 0xbe,0x46,0xd9,0x4b,0xde,0xd4,0xe8,0x4a,

- 0x6b,0x2a,0xe5,0x16,0xc5,0xd7,0x55,0x94,

- 0xcf,0x10,0x06,0x81,0xf0,0x44,0xba,0xe3,

- 0xf3,0xfe,0xc0,0x8a,0xad,0xbc,0x48,0x04,

- 0xdf,0xc1,0x75,0x63,0x30,0x1a,0x0e,0x6d,

- 0x4c,0x14,0x35,0x2f,0xe1,0xa2,0xcc,0x39,

- 0x57,0xf2,0x82,0x47,0xac,0xe7,0x2b,0x95,

- 0xa0,0x98,0xd1,0x7f,0x66,0x7e,0xab,0x83,

- 0xca,0x29,0xd3,0x3c,0x79,0xe2,0x1d,0x76,

- 0x3b,0x56,0x4e,0x1e,0xdb,0x0a,0x6c,0xe4,

- 0x5d,0x6e,0xef,0xa6,0xa8,0xa4,0x37,0x8b,

- 0x32,0x43,0x59,0xb7,0x8c,0x64,0xd2,0xe0,

- 0xb4,0xfa,0x07,0x25,0xaf,0x8e,0xe9,0x18,

- 0xd5,0x88,0x6f,0x72,0x24,0xf1,0xc7,0x51,

- 0x23,0x7c,0x9c,0x21,0xdd,0xdc,0x86,0x85,

- 0x90,0x42,0xc4,0xaa,0xd8,0x05,0x01,0x12,

- 0xa3,0x5f,0xf9,0xd0,0x91,0x58,0x27,0xb9,

- 0x38,0x13,0xb3,0x33,0xbb,0x70,0x89,0xa7,

- 0xb6,0x22,0x92,0x20,0x49,0xff,0x78,0x7a,

- 0x8f,0xf8,0x80,0x17,0xda,0x31,0xc6,0xb8,

- 0xc3,0xb0,0x77,0x11,0xcb,0xfc,0xd6,0x3a

-};

-

-static const uint_8t gfmul_9[256] = {

- 0x00,0x09,0x12,0x1b,0x24,0x2d,0x36,0x3f,

- 0x48,0x41,0x5a,0x53,0x6c,0x65,0x7e,0x77,

- 0x90,0x99,0x82,0x8b,0xb4,0xbd,0xa6,0xaf,

- 0xd8,0xd1,0xca,0xc3,0xfc,0xf5,0xee,0xe7,

- 0x3b,0x32,0x29,0x20,0x1f,0x16,0x0d,0x04,

- 0x73,0x7a,0x61,0x68,0x57,0x5e,0x45,0x4c,

- 0xab,0xa2,0xb9,0xb0,0x8f,0x86,0x9d,0x94,

- 0xe3,0xea,0xf1,0xf8,0xc7,0xce,0xd5,0xdc,

- 0x76,0x7f,0x64,0x6d,0x52,0x5b,0x40,0x49,

- 0x3e,0x37,0x2c,0x25,0x1a,0x13,0x08,0x01,

- 0xe6,0xef,0xf4,0xfd,0xc2,0xcb,0xd0,0xd9,

- 0xae,0xa7,0xbc,0xb5,0x8a,0x83,0x98,0x91,

- 0x4d,0x44,0x5f,0x56,0x69,0x60,0x7b,0x72,

- 0x05,0x0c,0x17,0x1e,0x21,0x28,0x33,0x3a,

- 0xdd,0xd4,0xcf,0xc6,0xf9,0xf0,0xeb,0xe2,

- 0x95,0x9c,0x87,0x8e,0xb1,0xb8,0xa3,0xaa,

- 0xec,0xe5,0xfe,0xf7,0xc8,0xc1,0xda,0xd3,

- 0xa4,0xad,0xb6,0xbf,0x80,0x89,0x92,0x9b,

- 0x7c,0x75,0x6e,0x67,0x58,0x51,0x4a,0x43,

- 0x34,0x3d,0x26,0x2f,0x10,0x19,0x02,0x0b,

- 0xd7,0xde,0xc5,0xcc,0xf3,0xfa,0xe1,0xe8,

- 0x9f,0x96,0x8d,0x84,0xbb,0xb2,0xa9,0xa0,

- 0x47,0x4e,0x55,0x5c,0x63,0x6a,0x71,0x78,

- 0x0f,0x06,0x1d,0x14,0x2b,0x22,0x39,0x30,

- 0x9a,0x93,0x88,0x81,0xbe,0xb7,0xac,0xa5,

- 0xd2,0xdb,0xc0,0xc9,0xf6,0xff,0xe4,0xed,

- 0x0a,0x03,0x18,0x11,0x2e,0x27,0x3c,0x35,

- 0x42,0x4b,0x50,0x59,0x66,0x6f,0x74,0x7d,

- 0xa1,0xa8,0xb3,0xba,0x85,0x8c,0x97,0x9e,

- 0xe9,0xe0,0xfb,0xf2,0xcd,0xc4,0xdf,0xd6,

- 0x31,0x38,0x23,0x2a,0x15,0x1c,0x07,0x0e,

- 0x79,0x70,0x6b,0x62,0x5d,0x54,0x4f,0x46

-};

-

-static const uint_8t gfmul_b[256] = {

- 0x00,0x0b,0x16,0x1d,0x2c,0x27,0x3a,0x31,

- 0x58,0x53,0x4e,0x45,0x74,0x7f,0x62,0x69,

- 0xb0,0xbb,0xa6,0xad,0x9c,0x97,0x8a,0x81,

- 0xe8,0xe3,0xfe,0xf5,0xc4,0xcf,0xd2,0xd9,

- 0x7b,0x70,0x6d,0x66,0x57,0x5c,0x41,0x4a,

- 0x23,0x28,0x35,0x3e,0x0f,0x04,0x19,0x12,

- 0xcb,0xc0,0xdd,0xd6,0xe7,0xec,0xf1,0xfa,

- 0x93,0x98,0x85,0x8e,0xbf,0xb4,0xa9,0xa2,

- 0xf6,0xfd,0xe0,0xeb,0xda,0xd1,0xcc,0xc7,

- 0xae,0xa5,0xb8,0xb3,0x82,0x89,0x94,0x9f,

- 0x46,0x4d,0x50,0x5b,0x6a,0x61,0x7c,0x77,

- 0x1e,0x15,0x08,0x03,0x32,0x39,0x24,0x2f,

- 0x8d,0x86,0x9b,0x90,0xa1,0xaa,0xb7,0xbc,

- 0xd5,0xde,0xc3,0xc8,0xf9,0xf2,0xef,0xe4,

- 0x3d,0x36,0x2b,0x20,0x11,0x1a,0x07,0x0c,

- 0x65,0x6e,0x73,0x78,0x49,0x42,0x5f,0x54,

- 0xf7,0xfc,0xe1,0xea,0xdb,0xd0,0xcd,0xc6,

- 0xaf,0xa4,0xb9,0xb2,0x83,0x88,0x95,0x9e,

- 0x47,0x4c,0x51,0x5a,0x6b,0x60,0x7d,0x76,

- 0x1f,0x14,0x09,0x02,0x33,0x38,0x25,0x2e,

- 0x8c,0x87,0x9a,0x91,0xa0,0xab,0xb6,0xbd,

- 0xd4,0xdf,0xc2,0xc9,0xf8,0xf3,0xee,0xe5,

- 0x3c,0x37,0x2a,0x21,0x10,0x1b,0x06,0x0d,

- 0x64,0x6f,0x72,0x79,0x48,0x43,0x5e,0x55,

- 0x01,0x0a,0x17,0x1c,0x2d,0x26,0x3b,0x30,

- 0x59,0x52,0x4f,0x44,0x75,0x7e,0x63,0x68,

- 0xb1,0xba,0xa7,0xac,0x9d,0x96,0x8b,0x80,

- 0xe9,0xe2,0xff,0xf4,0xc5,0xce,0xd3,0xd8,

- 0x7a,0x71,0x6c,0x67,0x56,0x5d,0x40,0x4b,

- 0x22,0x29,0x34,0x3f,0x0e,0x05,0x18,0x13,

- 0xca,0xc1,0xdc,0xd7,0xe6,0xed,0xf0,0xfb,

- 0x92,0x99,0x84,0x8f,0xbe,0xb5,0xa8,0xa3

-};

-

-static const uint_8t gfmul_d[256] = {

- 0x00,0x0d,0x1a,0x17,0x34,0x39,0x2e,0x23,

- 0x68,0x65,0x72,0x7f,0x5c,0x51,0x46,0x4b,

- 0xd0,0xdd,0xca,0xc7,0xe4,0xe9,0xfe,0xf3,

- 0xb8,0xb5,0xa2,0xaf,0x8c,0x81,0x96,0x9b,

- 0xbb,0xb6,0xa1,0xac,0x8f,0x82,0x95,0x98,

- 0xd3,0xde,0xc9,0xc4,0xe7,0xea,0xfd,0xf0,

- 0x6b,0x66,0x71,0x7c,0x5f,0x52,0x45,0x48,

- 0x03,0x0e,0x19,0x14,0x37,0x3a,0x2d,0x20,

- 0x6d,0x60,0x77,0x7a,0x59,0x54,0x43,0x4e,

- 0x05,0x08,0x1f,0x12,0x31,0x3c,0x2b,0x26,

- 0xbd,0xb0,0xa7,0xaa,0x89,0x84,0x93,0x9e,

- 0xd5,0xd8,0xcf,0xc2,0xe1,0xec,0xfb,0xf6,

- 0xd6,0xdb,0xcc,0xc1,0xe2,0xef,0xf8,0xf5,

- 0xbe,0xb3,0xa4,0xa9,0x8a,0x87,0x90,0x9d,

- 0x06,0x0b,0x1c,0x11,0x32,0x3f,0x28,0x25,

- 0x6e,0x63,0x74,0x79,0x5a,0x57,0x40,0x4d,

- 0xda,0xd7,0xc0,0xcd,0xee,0xe3,0xf4,0xf9,

- 0xb2,0xbf,0xa8,0xa5,0x86,0x8b,0x9c,0x91,

- 0x0a,0x07,0x10,0x1d,0x3e,0x33,0x24,0x29,

- 0x62,0x6f,0x78,0x75,0x56,0x5b,0x4c,0x41,

- 0x61,0x6c,0x7b,0x76,0x55,0x58,0x4f,0x42,

- 0x09,0x04,0x13,0x1e,0x3d,0x30,0x27,0x2a,

- 0xb1,0xbc,0xab,0xa6,0x85,0x88,0x9f,0x92,

- 0xd9,0xd4,0xc3,0xce,0xed,0xe0,0xf7,0xfa,

- 0xb7,0xba,0xad,0xa0,0x83,0x8e,0x99,0x94,

- 0xdf,0xd2,0xc5,0xc8,0xeb,0xe6,0xf1,0xfc,

- 0x67,0x6a,0x7d,0x70,0x53,0x5e,0x49,0x44,

- 0x0f,0x02,0x15,0x18,0x3b,0x36,0x21,0x2c,

- 0x0c,0x01,0x16,0x1b,0x38,0x35,0x22,0x2f,

- 0x64,0x69,0x7e,0x73,0x50,0x5d,0x4a,0x47,

- 0xdc,0xd1,0xc6,0xcb,0xe8,0xe5,0xf2,0xff,

- 0xb4,0xb9,0xae,0xa3,0x80,0x8d,0x9a,0x97

-};

-

-static const uint_8t gfmul_e[256] = {

- 0x00,0x0e,0x1c,0x12,0x38,0x36,0x24,0x2a,

- 0x70,0x7e,0x6c,0x62,0x48,0x46,0x54,0x5a,

- 0xe0,0xee,0xfc,0xf2,0xd8,0xd6,0xc4,0xca,

- 0x90,0x9e,0x8c,0x82,0xa8,0xa6,0xb4,0xba,

- 0xdb,0xd5,0xc7,0xc9,0xe3,0xed,0xff,0xf1,

- 0xab,0xa5,0xb7,0xb9,0x93,0x9d,0x8f,0x81,

- 0x3b,0x35,0x27,0x29,0x03,0x0d,0x1f,0x11,

- 0x4b,0x45,0x57,0x59,0x73,0x7d,0x6f,0x61,

- 0xad,0xa3,0xb1,0xbf,0x95,0x9b,0x89,0x87,

- 0xdd,0xd3,0xc1,0xcf,0xe5,0xeb,0xf9,0xf7,

- 0x4d,0x43,0x51,0x5f,0x75,0x7b,0x69,0x67,

- 0x3d,0x33,0x21,0x2f,0x05,0x0b,0x19,0x17,

- 0x76,0x78,0x6a,0x64,0x4e,0x40,0x52,0x5c,

- 0x06,0x08,0x1a,0x14,0x3e,0x30,0x22,0x2c,

- 0x96,0x98,0x8a,0x84,0xae,0xa0,0xb2,0xbc,

- 0xe6,0xe8,0xfa,0xf4,0xde,0xd0,0xc2,0xcc,

- 0x41,0x4f,0x5d,0x53,0x79,0x77,0x65,0x6b,

- 0x31,0x3f,0x2d,0x23,0x09,0x07,0x15,0x1b,

- 0xa1,0xaf,0xbd,0xb3,0x99,0x97,0x85,0x8b,

- 0xd1,0xdf,0xcd,0xc3,0xe9,0xe7,0xf5,0xfb,

- 0x9a,0x94,0x86,0x88,0xa2,0xac,0xbe,0xb0,

- 0xea,0xe4,0xf6,0xf8,0xd2,0xdc,0xce,0xc0,

- 0x7a,0x74,0x66,0x68,0x42,0x4c,0x5e,0x50,

- 0x0a,0x04,0x16,0x18,0x32,0x3c,0x2e,0x20,

- 0xec,0xe2,0xf0,0xfe,0xd4,0xda,0xc8,0xc6,

- 0x9c,0x92,0x80,0x8e,0xa4,0xaa,0xb8,0xb6,

- 0x0c,0x02,0x10,0x1e,0x34,0x3a,0x28,0x26,

- 0x7c,0x72,0x60,0x6e,0x44,0x4a,0x58,0x56,

- 0x37,0x39,0x2b,0x25,0x0f,0x01,0x13,0x1d,

- 0x47,0x49,0x5b,0x55,0x7f,0x71,0x63,0x6d,

- 0xd7,0xd9,0xcb,0xc5,0xef,0xe1,0xf3,0xfd,

- 0xa7,0xa9,0xbb,0xb5,0x9f,0x91,0x83,0x8d

-};

-

-#if defined( HAVE_UINT_32T )

- typedef unsigned long uint_32t;

-#endif

-

-#if defined( HAVE_MEMCPY )

-# define block_copy(d, s, l) memcpy(d, s, l)

-# define block16_copy(d, s) memcpy(d, s, N_BLOCK)

-#else

-# define block_copy(d, s, l) copy_block(d, s, l)

-# define block16_copy(d, s) copy_block16(d, s)

-#endif

-

-/* block size 'nn' must be a multiple of four */

-

-static void copy_block16( void *d, const void *s )

-{

-#if defined( HAVE_UINT_32T )

- ((uint_32t*)d)[ 0] = ((uint_32t*)s)[ 0];

- ((uint_32t*)d)[ 1] = ((uint_32t*)s)[ 1];

- ((uint_32t*)d)[ 2] = ((uint_32t*)s)[ 2];

- ((uint_32t*)d)[ 3] = ((uint_32t*)s)[ 3];

-#else

- ((uint_8t*)d)[ 0] = ((uint_8t*)s)[ 0];

- ((uint_8t*)d)[ 1] = ((uint_8t*)s)[ 1];

- ((uint_8t*)d)[ 2] = ((uint_8t*)s)[ 2];

- ((uint_8t*)d)[ 3] = ((uint_8t*)s)[ 3];

- ((uint_8t*)d)[ 4] = ((uint_8t*)s)[ 4];

- ((uint_8t*)d)[ 5] = ((uint_8t*)s)[ 5];

- ((uint_8t*)d)[ 6] = ((uint_8t*)s)[ 6];

- ((uint_8t*)d)[ 7] = ((uint_8t*)s)[ 7];

- ((uint_8t*)d)[ 8] = ((uint_8t*)s)[ 8];

- ((uint_8t*)d)[ 9] = ((uint_8t*)s)[ 9];

- ((uint_8t*)d)[10] = ((uint_8t*)s)[10];

- ((uint_8t*)d)[11] = ((uint_8t*)s)[11];

- ((uint_8t*)d)[12] = ((uint_8t*)s)[12];

- ((uint_8t*)d)[13] = ((uint_8t*)s)[13];

- ((uint_8t*)d)[14] = ((uint_8t*)s)[14];

- ((uint_8t*)d)[15] = ((uint_8t*)s)[15];

-#endif

-}

-

-static void copy_block( void * d, void *s, uint_8t nn )

-{

- while( nn-- )

- *((uint_8t*)d)++ = *((uint_8t*)s)++;

-}

-

-static void xor_block( void *d, const void *s )

-{

-#if defined( HAVE_UINT_32T )

- ((uint_32t*)d)[ 0] ^= ((uint_32t*)s)[ 0];

- ((uint_32t*)d)[ 1] ^= ((uint_32t*)s)[ 1];

- ((uint_32t*)d)[ 2] ^= ((uint_32t*)s)[ 2];

- ((uint_32t*)d)[ 3] ^= ((uint_32t*)s)[ 3];

-#else

- ((uint_8t*)d)[ 0] ^= ((uint_8t*)s)[ 0];

- ((uint_8t*)d)[ 1] ^= ((uint_8t*)s)[ 1];

- ((uint_8t*)d)[ 2] ^= ((uint_8t*)s)[ 2];

- ((uint_8t*)d)[ 3] ^= ((uint_8t*)s)[ 3];

- ((uint_8t*)d)[ 4] ^= ((uint_8t*)s)[ 4];

- ((uint_8t*)d)[ 5] ^= ((uint_8t*)s)[ 5];

- ((uint_8t*)d)[ 6] ^= ((uint_8t*)s)[ 6];

- ((uint_8t*)d)[ 7] ^= ((uint_8t*)s)[ 7];

- ((uint_8t*)d)[ 8] ^= ((uint_8t*)s)[ 8];

- ((uint_8t*)d)[ 9] ^= ((uint_8t*)s)[ 9];

- ((uint_8t*)d)[10] ^= ((uint_8t*)s)[10];

- ((uint_8t*)d)[11] ^= ((uint_8t*)s)[11];

- ((uint_8t*)d)[12] ^= ((uint_8t*)s)[12];

- ((uint_8t*)d)[13] ^= ((uint_8t*)s)[13];

- ((uint_8t*)d)[14] ^= ((uint_8t*)s)[14];

- ((uint_8t*)d)[15] ^= ((uint_8t*)s)[15];

-#endif

-}

-

-static void copy_and_key( void *d, const void *s, const void *k )

-{

-#if defined( HAVE_UINT_32T )

- ((uint_32t*)d)[ 0] = ((uint_32t*)s)[ 0] ^ ((uint_32t*)k)[ 0];

- ((uint_32t*)d)[ 1] = ((uint_32t*)s)[ 1] ^ ((uint_32t*)k)[ 1];

- ((uint_32t*)d)[ 2] = ((uint_32t*)s)[ 2] ^ ((uint_32t*)k)[ 2];

- ((uint_32t*)d)[ 3] = ((uint_32t*)s)[ 3] ^ ((uint_32t*)k)[ 3];

-#elif 1

- ((uint_8t*)d)[ 0] = ((uint_8t*)s)[ 0] ^ ((uint_8t*)k)[ 0];

- ((uint_8t*)d)[ 1] = ((uint_8t*)s)[ 1] ^ ((uint_8t*)k)[ 1];

- ((uint_8t*)d)[ 2] = ((uint_8t*)s)[ 2] ^ ((uint_8t*)k)[ 2];

- ((uint_8t*)d)[ 3] = ((uint_8t*)s)[ 3] ^ ((uint_8t*)k)[ 3];

- ((uint_8t*)d)[ 4] = ((uint_8t*)s)[ 4] ^ ((uint_8t*)k)[ 4];

- ((uint_8t*)d)[ 5] = ((uint_8t*)s)[ 5] ^ ((uint_8t*)k)[ 5];

- ((uint_8t*)d)[ 6] = ((uint_8t*)s)[ 6] ^ ((uint_8t*)k)[ 6];

- ((uint_8t*)d)[ 7] = ((uint_8t*)s)[ 7] ^ ((uint_8t*)k)[ 7];

- ((uint_8t*)d)[ 8] = ((uint_8t*)s)[ 8] ^ ((uint_8t*)k)[ 8];

- ((uint_8t*)d)[ 9] = ((uint_8t*)s)[ 9] ^ ((uint_8t*)k)[ 9];

- ((uint_8t*)d)[10] = ((uint_8t*)s)[10] ^ ((uint_8t*)k)[10];

- ((uint_8t*)d)[11] = ((uint_8t*)s)[11] ^ ((uint_8t*)k)[11];

- ((uint_8t*)d)[12] = ((uint_8t*)s)[12] ^ ((uint_8t*)k)[12];

- ((uint_8t*)d)[13] = ((uint_8t*)s)[13] ^ ((uint_8t*)k)[13];

- ((uint_8t*)d)[14] = ((uint_8t*)s)[14] ^ ((uint_8t*)k)[14];

- ((uint_8t*)d)[15] = ((uint_8t*)s)[15] ^ ((uint_8t*)k)[15];

-#else

- block16_copy(d, s);

- xor_block(d, k);

-#endif

-}

-

-static void add_round_key( uint_8t d[N_BLOCK], const uint_8t k[N_BLOCK] )

-{

- xor_block(d, k);

-}

-

-static void shift_sub_rows( uint_8t st[N_BLOCK] )

-{ uint_8t tt;

-

- st[ 0] = s_box[st[ 0]]; st[ 4] = s_box[st[ 4]];

- st[ 8] = s_box[st[ 8]]; st[12] = s_box[st[12]];

-

- tt = st[1]; st[ 1] = s_box[st[ 5]]; st[ 5] = s_box[st[ 9]];

- st[ 9] = s_box[st[13]]; st[13] = s_box[ tt ];

-

- tt = st[2]; st[ 2] = s_box[st[10]]; st[10] = s_box[ tt ];

- tt = st[6]; st[ 6] = s_box[st[14]]; st[14] = s_box[ tt ];

-

- tt = st[15]; st[15] = s_box[st[11]]; st[11] = s_box[st[ 7]];

- st[ 7] = s_box[st[ 3]]; st[ 3] = s_box[ tt ];

-}

-

-static void inv_shift_sub_rows( uint_8t st[N_BLOCK] )

-{ uint_8t tt;

-

- st[ 0] = inv_s_box[st[ 0]]; st[ 4] = inv_s_box[st[ 4]];

- st[ 8] = inv_s_box[st[ 8]]; st[12] = inv_s_box[st[12]];

-

- tt = st[13]; st[13] = inv_s_box[st[9]]; st[ 9] = inv_s_box[st[5]];

- st[ 5] = inv_s_box[st[1]]; st[ 1] = inv_s_box[ tt ];

-

- tt = st[2]; st[ 2] = inv_s_box[st[10]]; st[10] = inv_s_box[ tt ];

- tt = st[6]; st[ 6] = inv_s_box[st[14]]; st[14] = inv_s_box[ tt ];

-

- tt = st[3]; st[ 3] = inv_s_box[st[ 7]]; st[ 7] = inv_s_box[st[11]];

- st[11] = inv_s_box[st[15]]; st[15] = inv_s_box[ tt ];

-}

-

-#if defined( VERSION_1 )

- static void mix_sub_columns( uint_8t dt[N_BLOCK] )

- { uint_8t st[N_BLOCK];

- block16_copy(st, dt);

-#else

- static void mix_sub_columns( uint_8t dt[N_BLOCK], uint_8t st[N_BLOCK] )

- {

-#endif

- dt[ 0] = gfm2_s_box[st[0]] ^ gfm3_s_box[st[5]] ^ s_box[st[10]] ^ s_box[st[15]];

- dt[ 1] = s_box[st[0]] ^ gfm2_s_box[st[5]] ^ gfm3_s_box[st[10]] ^ s_box[st[15]];

- dt[ 2] = s_box[st[0]] ^ s_box[st[5]] ^ gfm2_s_box[st[10]] ^ gfm3_s_box[st[15]];

- dt[ 3] = gfm3_s_box[st[0]] ^ s_box[st[5]] ^ s_box[st[10]] ^ gfm2_s_box[st[15]];

-

- dt[ 4] = gfm2_s_box[st[4]] ^ gfm3_s_box[st[9]] ^ s_box[st[14]] ^ s_box[st[3]];

- dt[ 5] = s_box[st[4]] ^ gfm2_s_box[st[9]] ^ gfm3_s_box[st[14]] ^ s_box[st[3]];

- dt[ 6] = s_box[st[4]] ^ s_box[st[9]] ^ gfm2_s_box[st[14]] ^ gfm3_s_box[st[3]];

- dt[ 7] = gfm3_s_box[st[4]] ^ s_box[st[9]] ^ s_box[st[14]] ^ gfm2_s_box[st[3]];

-

- dt[ 8] = gfm2_s_box[st[8]] ^ gfm3_s_box[st[13]] ^ s_box[st[2]] ^ s_box[st[7]];

- dt[ 9] = s_box[st[8]] ^ gfm2_s_box[st[13]] ^ gfm3_s_box[st[2]] ^ s_box[st[7]];

- dt[10] = s_box[st[8]] ^ s_box[st[13]] ^ gfm2_s_box[st[2]] ^ gfm3_s_box[st[7]];

- dt[11] = gfm3_s_box[st[8]] ^ s_box[st[13]] ^ s_box[st[2]] ^ gfm2_s_box[st[7]];

-

- dt[12] = gfm2_s_box[st[12]] ^ gfm3_s_box[st[1]] ^ s_box[st[6]] ^ s_box[st[11]];

- dt[13] = s_box[st[12]] ^ gfm2_s_box[st[1]] ^ gfm3_s_box[st[6]] ^ s_box[st[11]];

- dt[14] = s_box[st[12]] ^ s_box[st[1]] ^ gfm2_s_box[st[6]] ^ gfm3_s_box[st[11]];

- dt[15] = gfm3_s_box[st[12]] ^ s_box[st[1]] ^ s_box[st[6]] ^ gfm2_s_box[st[11]];

- }

-

-#if defined( VERSION_1 )

- static void inv_mix_sub_columns( uint_8t dt[N_BLOCK] )

- { uint_8t st[N_BLOCK];

- block16_copy(st, dt);

-#else

- static void inv_mix_sub_columns( uint_8t dt[N_BLOCK], uint_8t st[N_BLOCK] )

- {

-#endif

- dt[ 0] = inv_s_box[gfmul_e[st[ 0]] ^ gfmul_b[st[ 1]] ^ gfmul_d[st[ 2]] ^ gfmul_9[st[ 3]]];

- dt[ 5] = inv_s_box[gfmul_9[st[ 0]] ^ gfmul_e[st[ 1]] ^ gfmul_b[st[ 2]] ^ gfmul_d[st[ 3]]];

- dt[10] = inv_s_box[gfmul_d[st[ 0]] ^ gfmul_9[st[ 1]] ^ gfmul_e[st[ 2]] ^ gfmul_b[st[ 3]]];

- dt[15] = inv_s_box[gfmul_b[st[ 0]] ^ gfmul_d[st[ 1]] ^ gfmul_9[st[ 2]] ^ gfmul_e[st[ 3]]];

-

- dt[ 4] = inv_s_box[gfmul_e[st[ 4]] ^ gfmul_b[st[ 5]] ^ gfmul_d[st[ 6]] ^ gfmul_9[st[ 7]]];

- dt[ 9] = inv_s_box[gfmul_9[st[ 4]] ^ gfmul_e[st[ 5]] ^ gfmul_b[st[ 6]] ^ gfmul_d[st[ 7]]];

- dt[14] = inv_s_box[gfmul_d[st[ 4]] ^ gfmul_9[st[ 5]] ^ gfmul_e[st[ 6]] ^ gfmul_b[st[ 7]]];

- dt[ 3] = inv_s_box[gfmul_b[st[ 4]] ^ gfmul_d[st[ 5]] ^ gfmul_9[st[ 6]] ^ gfmul_e[st[ 7]]];

-

- dt[ 8] = inv_s_box[gfmul_e[st[ 8]] ^ gfmul_b[st[ 9]] ^ gfmul_d[st[10]] ^ gfmul_9[st[11]]];

- dt[13] = inv_s_box[gfmul_9[st[ 8]] ^ gfmul_e[st[ 9]] ^ gfmul_b[st[10]] ^ gfmul_d[st[11]]];

- dt[ 2] = inv_s_box[gfmul_d[st[ 8]] ^ gfmul_9[st[ 9]] ^ gfmul_e[st[10]] ^ gfmul_b[st[11]]];

- dt[ 7] = inv_s_box[gfmul_b[st[ 8]] ^ gfmul_d[st[ 9]] ^ gfmul_9[st[10]] ^ gfmul_e[st[11]]];

-

- dt[12] = inv_s_box[gfmul_e[st[12]] ^ gfmul_b[st[13]] ^ gfmul_d[st[14]] ^ gfmul_9[st[15]]];

- dt[ 1] = inv_s_box[gfmul_9[st[12]] ^ gfmul_e[st[13]] ^ gfmul_b[st[14]] ^ gfmul_d[st[15]]];

- dt[ 6] = inv_s_box[gfmul_d[st[12]] ^ gfmul_9[st[13]] ^ gfmul_e[st[14]] ^ gfmul_b[st[15]]];

- dt[11] = inv_s_box[gfmul_b[st[12]] ^ gfmul_d[st[13]] ^ gfmul_9[st[14]] ^ gfmul_e[st[15]]];

- }

-

-#if defined( AES_ENC_PREKEYED ) || defined( AES_DEC_PREKEYED )

-

-/* Set the cipher key for the pre-keyed version */

-

-return_type aes_set_key( const unsigned char key[], length_type keylen, aes_context ctx[1] )

-{

- uint_8t cc, rc, hi;

-

- switch( keylen )

- {

- case 16:

- case 128:

- keylen = 16;

- break;

- case 24:

- case 192:

- keylen = 24;

- break;

- case 32:

- case 256:

- keylen = 32;

- break;

- default:

- ctx->rnd = 0;

- return (return_type) -1;

- }

- block_copy(ctx->ksch, key, keylen);

- hi = (keylen + 28) << 2;

- ctx->rnd = (hi >> 4) - 1;

- for( cc = keylen, rc = 1; cc < hi; cc += 4 )

- { uint_8t tt, t0, t1, t2, t3;

-

- t0 = ctx->ksch[cc - 4];

- t1 = ctx->ksch[cc - 3];

- t2 = ctx->ksch[cc - 2];

- t3 = ctx->ksch[cc - 1];

- if( cc % keylen == 0 )

- {

- tt = t0;

- t0 = s_box[t1] ^ rc;

- t1 = s_box[t2];

- t2 = s_box[t3];

- t3 = s_box[tt];

- rc = f2(rc);

- }

- else if( keylen > 24 && cc % keylen == 16 )

- {

- t0 = s_box[t0];

- t1 = s_box[t1];

- t2 = s_box[t2];

- t3 = s_box[t3];

- }

- tt = cc - keylen;

- ctx->ksch[cc + 0] = ctx->ksch[tt + 0] ^ t0;

- ctx->ksch[cc + 1] = ctx->ksch[tt + 1] ^ t1;

- ctx->ksch[cc + 2] = ctx->ksch[tt + 2] ^ t2;

- ctx->ksch[cc + 3] = ctx->ksch[tt + 3] ^ t3;

- }

- return 0;

-}

-

-#endif

-

-#if defined( AES_ENC_PREKEYED )

-

-/* Encrypt a single block of 16 bytes */

-

-return_type aes_encrypt( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const aes_context ctx[1] )

-{

- if( ctx->rnd )

- {

- uint_8t s1[N_BLOCK], r;

- copy_and_key( s1, in, ctx->ksch );

-

- for( r = 1 ; r < ctx->rnd ; ++r )

-#if defined( VERSION_1 )

- {

- mix_sub_columns( s1 );

- add_round_key( s1, ctx->ksch + r * N_BLOCK);

- }

-#else

- { uint_8t s2[N_BLOCK];

- mix_sub_columns( s2, s1 );

- copy_and_key( s1, s2, ctx->ksch + r * N_BLOCK);

- }

-#endif

- shift_sub_rows( s1 );

- copy_and_key( out, s1, ctx->ksch + r * N_BLOCK );

- }

- else

- return (return_type) -1;

- return 0;

-}

-

-#endif

-

-#if defined( AES_DEC_PREKEYED )

-

-/* Decrypt a single block of 16 bytes */

-

-return_type aes_decrypt( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const aes_context ctx[1] )

-{

- if( ctx->rnd )

- {

- uint_8t s1[N_BLOCK], r;

- copy_and_key( s1, in, ctx->ksch + ctx->rnd * N_BLOCK );

- inv_shift_sub_rows( s1 );

-

- for( r = ctx->rnd ; --r ; )

-#if defined( VERSION_1 )

- {

- add_round_key( s1, ctx->ksch + r * N_BLOCK );

- inv_mix_sub_columns( s1 );

- }

-#else

- { uint_8t s2[N_BLOCK];

- copy_and_key( s2, s1, ctx->ksch + r * N_BLOCK );

- inv_mix_sub_columns( s1, s2 );

- }

-#endif

- copy_and_key( out, s1, ctx->ksch );

- }

- else

- return (return_type) -1;

- return 0;

-}

-

-#endif

-

-#if defined( AES_ENC_128_OTFK )

-

-/* The 'on the fly' encryption key update for for 128 bit keys */

-

-static void update_encrypt_key_128( uint_8t k[N_BLOCK], uint_8t *rc )

-{ uint_8t cc;

-

- k[0] ^= s_box[k[13]] ^ *rc;

- k[1] ^= s_box[k[14]];

- k[2] ^= s_box[k[15]];

- k[3] ^= s_box[k[12]];

- *rc = f2( *rc );

-

- for(cc = 4; cc < 16; cc += 4 )

- {

- k[cc + 0] ^= k[cc - 4];

- k[cc + 1] ^= k[cc - 3];

- k[cc + 2] ^= k[cc - 2];

- k[cc + 3] ^= k[cc - 1];

- }

-}

-

-/* Encrypt a single block of 16 bytes with 'on the fly' 128 bit keying */

-

-void aes_encrypt_128( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK],

- const unsigned char key[N_BLOCK], unsigned char o_key[N_BLOCK] )

-{ uint_8t s1[N_BLOCK], r, rc = 1;

-

- if(o_key != key)

- block16_copy( o_key, key );

- copy_and_key( s1, in, o_key );

-

- for( r = 1 ; r < 10 ; ++r )

-#if defined( VERSION_1 )

- {

- mix_sub_columns( s1 );

- update_encrypt_key_128( o_key, &rc );

- add_round_key( s1, o_key );

- }

-#else

- { uint_8t s2[N_BLOCK];

- mix_sub_columns( s2, s1 );

- update_encrypt_key_128( o_key, &rc );

- copy_and_key( s1, s2, o_key );

- }

-#endif

-

- shift_sub_rows( s1 );

- update_encrypt_key_128( o_key, &rc );

- copy_and_key( out, s1, o_key );

-}

-

-#endif

-

-#if defined( AES_DEC_128_OTFK )

-

-/* The 'on the fly' decryption key update for for 128 bit keys */

-

-static void update_decrypt_key_128( uint_8t k[N_BLOCK], uint_8t *rc )

-{ uint_8t cc;

-

- for( cc = 12; cc > 0; cc -= 4 )

- {

- k[cc + 0] ^= k[cc - 4];

- k[cc + 1] ^= k[cc - 3];

- k[cc + 2] ^= k[cc - 2];

- k[cc + 3] ^= k[cc - 1];

- }

- *rc = d2(*rc);

- k[0] ^= s_box[k[13]] ^ *rc;

- k[1] ^= s_box[k[14]];

- k[2] ^= s_box[k[15]];

- k[3] ^= s_box[k[12]];

-}

-

-/* Decrypt a single block of 16 bytes with 'on the fly' 128 bit keying */

-

-void aes_decrypt_128( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK],

- const unsigned char key[N_BLOCK], unsigned char o_key[N_BLOCK] )

-{

- uint_8t s1[N_BLOCK], r, rc = 0x6c;

- if(o_key != key)

- block16_copy( o_key, key );

-

- copy_and_key( s1, in, o_key );

- inv_shift_sub_rows( s1 );

-

- for( r = 10 ; --r ; )

-#if defined( VERSION_1 )

- {

- update_decrypt_key_128( o_key, &rc );

- add_round_key( s1, o_key );

- inv_mix_sub_columns( s1 );

- }

-#else

- { uint_8t s2[N_BLOCK];

- update_decrypt_key_128( o_key, &rc );

- copy_and_key( s2, s1, o_key );

- inv_mix_sub_columns( s1, s2 );

- }

-#endif

- update_decrypt_key_128( o_key, &rc );

- copy_and_key( out, s1, o_key );

-}

-

-#endif

-

-#if defined( AES_ENC_256_OTFK )

-

-/* The 'on the fly' encryption key update for for 256 bit keys */

-

-static void update_encrypt_key_256( uint_8t k[2 * N_BLOCK], uint_8t *rc )

-{ uint_8t cc;

-

- k[0] ^= s_box[k[29]] ^ *rc;

- k[1] ^= s_box[k[30]];

- k[2] ^= s_box[k[31]];

- k[3] ^= s_box[k[28]];

- *rc = f2( *rc );

-

- for(cc = 4; cc < 16; cc += 4)

- {

- k[cc + 0] ^= k[cc - 4];

- k[cc + 1] ^= k[cc - 3];

- k[cc + 2] ^= k[cc - 2];

- k[cc + 3] ^= k[cc - 1];

- }

-

- k[16] ^= s_box[k[12]];

- k[17] ^= s_box[k[13]];

- k[18] ^= s_box[k[14]];

- k[19] ^= s_box[k[15]];

-

- for( cc = 20; cc < 32; cc += 4 )

- {

- k[cc + 0] ^= k[cc - 4];

- k[cc + 1] ^= k[cc - 3];

- k[cc + 2] ^= k[cc - 2];

- k[cc + 3] ^= k[cc - 1];

- }

-}

-

-/* Encrypt a single block of 16 bytes with 'on the fly' 256 bit keying */

-

-void aes_encrypt_256( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK],

- const unsigned char key[2 * N_BLOCK], unsigned char o_key[2 * N_BLOCK] )

-{

- uint_8t s1[N_BLOCK], r, rc = 1;

- if(o_key != key)

- {

- block16_copy( o_key, key );

- block16_copy( o_key + 16, key + 16 );

- }

- copy_and_key( s1, in, o_key );

-

- for( r = 1 ; r < 14 ; ++r )

-#if defined( VERSION_1 )

- {

- mix_sub_columns(s1);

- if( r & 1 )

- add_round_key( s1, o_key + 16 );

- else

- {

- update_encrypt_key_256( o_key, &rc );

- add_round_key( s1, o_key );

- }

- }

-#else

- { uint_8t s2[N_BLOCK];

- mix_sub_columns( s2, s1 );

- if( r & 1 )

- copy_and_key( s1, s2, o_key + 16 );

- else

- {

- update_encrypt_key_256( o_key, &rc );

- copy_and_key( s1, s2, o_key );

- }

- }

-#endif

-

- shift_sub_rows( s1 );

- update_encrypt_key_256( o_key, &rc );

- copy_and_key( out, s1, o_key );

-}

-

-#endif

-

-#if defined( AES_DEC_256_OTFK )

-

-/* The 'on the fly' encryption key update for for 256 bit keys */

-

-static void update_decrypt_key_256( uint_8t k[2 * N_BLOCK], uint_8t *rc )

-{ uint_8t cc;

-

- for(cc = 28; cc > 16; cc -= 4)

- {

- k[cc + 0] ^= k[cc - 4];

- k[cc + 1] ^= k[cc - 3];

- k[cc + 2] ^= k[cc - 2];

- k[cc + 3] ^= k[cc - 1];

- }

-

- k[16] ^= s_box[k[12]];

- k[17] ^= s_box[k[13]];

- k[18] ^= s_box[k[14]];

- k[19] ^= s_box[k[15]];

-

- for(cc = 12; cc > 0; cc -= 4)

- {

- k[cc + 0] ^= k[cc - 4];

- k[cc + 1] ^= k[cc - 3];

- k[cc + 2] ^= k[cc - 2];

- k[cc + 3] ^= k[cc - 1];

- }

-

- *rc = d2(*rc);

- k[0] ^= s_box[k[29]] ^ *rc;

- k[1] ^= s_box[k[30]];

- k[2] ^= s_box[k[31]];

- k[3] ^= s_box[k[28]];

-}

-

-/* Decrypt a single block of 16 bytes with 'on the fly'

- 256 bit keying

-*/

-void aes_decrypt_256( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK],

- const unsigned char key[2 * N_BLOCK], unsigned char o_key[2 * N_BLOCK] )

-{

- uint_8t s1[N_BLOCK], r, rc = 0x80;

-

- if(o_key != key)

- {

- block16_copy( o_key, key );

- block16_copy( o_key + 16, key + 16 );

- }

-

- copy_and_key( s1, in, o_key );

- inv_shift_sub_rows( s1 );

-

- for( r = 14 ; --r ; )

-#if defined( VERSION_1 )

- {

- if( ( r & 1 ) )

- {

- update_decrypt_key_256( o_key, &rc );

- add_round_key( s1, o_key + 16 );

- }

- else

- add_round_key( s1, o_key );

- inv_mix_sub_columns( s1 );

- }

-#else

- { uint_8t s2[N_BLOCK];

- if( ( r & 1 ) )

- {

- update_decrypt_key_256( o_key, &rc );

- copy_and_key( s2, s1, o_key + 16 );

- }

- else

- copy_and_key( s2, s1, o_key );

- inv_mix_sub_columns( s1, s2 );

- }

-#endif

- copy_and_key( out, s1, o_key );

-}

-

-#endif