/* | |
--------------------------------------------------------------------------- | |
Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. All rights reserved. | |
LICENSE TERMS | |
The free distribution and use of this software in both source and binary | |
form is allowed (with or without changes) provided that: | |
1. distributions of this source code include the above copyright | |
notice, this list of conditions and the following disclaimer; | |
2. distributions in binary form include the above copyright | |
notice, this list of conditions and the following disclaimer | |
in the documentation and/or other associated materials; | |
3. the copyright holder's name is not used to endorse products | |
built using this software without specific written permission. | |
ALTERNATIVELY, provided that this notice is retained in full, this product | |
may be distributed under the terms of the GNU General Public License (GPL), | |
in which case the provisions of the GPL apply INSTEAD OF those given above. | |
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 28/01/2004 | |
This file contains the code for declaring the tables needed to implement | |
AES. The file aesopt.h is assumed to be included before this header file. | |
If there are no global variables, the definitions here can be used to put | |
the AES tables in a structure so that a pointer can then be added to the | |
AES context to pass them to the AES routines that need them. If this | |
facility is used, the calling program has to ensure that this pointer is | |
managed appropriately. In particular, the value of the t_dec(in,it) item | |
in the table structure must be set to zero in order to ensure that the | |
tables are initialised. In practice the three code sequences in aeskey.c | |
that control the calls to gen_tabs() and the gen_tabs() routine itself will | |
have to be changed for a specific implementation. If global variables are | |
available it will generally be preferable to use them with the precomputed | |
FIXED_TABLES option that uses static global tables. | |
The following defines can be used to control the way the tables | |
are defined, initialised and used in embedded environments that | |
require special features for these purposes | |
the 't_dec' construction is used to declare fixed table arrays | |
the 't_set' construction is used to set fixed table values | |
the 't_use' construction is used to access fixed table values | |
256 byte tables: | |
t_xxx(s,box) => forward S box | |
t_xxx(i,box) => inverse S box | |
256 32-bit word OR 4 x 256 32-bit word tables: | |
t_xxx(f,n) => forward normal round | |
t_xxx(f,l) => forward last round | |
t_xxx(i,n) => inverse normal round | |
t_xxx(i,l) => inverse last round | |
t_xxx(l,s) => key schedule table | |
t_xxx(i,m) => key schedule table | |
Other variables and tables: | |
t_xxx(r,c) => the rcon table | |
*/ | |
#if !defined( _AESTAB_H ) | |
#define _AESTAB_H | |
#define t_dec(m,n) t_##m##n | |
#define t_set(m,n) t_##m##n | |
#define t_use(m,n) t_##m##n | |
#if defined(FIXED_TABLES) | |
#define Const const | |
#else | |
#define Const | |
#endif | |
#if defined(DO_TABLES) | |
#define Extern | |
#else | |
#define Extern extern | |
#endif | |
#if defined(_MSC_VER) && defined(TABLE_ALIGN) | |
#define Align __declspec(align(TABLE_ALIGN)) | |
#else | |
#define Align | |
#endif | |
#if defined(__cplusplus) | |
extern "C" | |
{ | |
#endif | |
#if defined(DO_TABLES) && defined(FIXED_TABLES) | |
#define d_1(t,n,b,e) Align Const t n[256] = b(e) | |
#define d_4(t,n,b,e,f,g,h) Align Const t n[4][256] = { b(e), b(f), b(g), b(h) } | |
Extern Align Const aes_32t t_dec(r,c)[RC_LENGTH] = rc_data(w0); | |
#else | |
#define d_1(t,n,b,e) Extern Align Const t n[256] | |
#define d_4(t,n,b,e,f,g,h) Extern Align Const t n[4][256] | |
Extern Align Const aes_32t t_dec(r,c)[RC_LENGTH]; | |
#endif | |
#if defined( SBX_SET ) | |
d_1(aes_08t, t_dec(s,box), sb_data, h0); | |
#endif | |
#if defined( ISB_SET ) | |
d_1(aes_08t, t_dec(i,box), isb_data, h0); | |
#endif | |
#if defined( FT1_SET ) | |
d_1(aes_32t, t_dec(f,n), sb_data, u0); | |
#endif | |
#if defined( FT4_SET ) | |
d_4(aes_32t, t_dec(f,n), sb_data, u0, u1, u2, u3); | |
#endif | |
#if defined( FL1_SET ) | |
d_1(aes_32t, t_dec(f,l), sb_data, w0); | |
#endif | |
#if defined( FL4_SET ) | |
d_4(aes_32t, t_dec(f,l), sb_data, w0, w1, w2, w3); | |
#endif | |
#if defined( IT1_SET ) | |
d_1(aes_32t, t_dec(i,n), isb_data, v0); | |
#endif | |
#if defined( IT4_SET ) | |
d_4(aes_32t, t_dec(i,n), isb_data, v0, v1, v2, v3); | |
#endif | |
#if defined( IL1_SET ) | |
d_1(aes_32t, t_dec(i,l), isb_data, w0); | |
#endif | |
#if defined( IL4_SET ) | |
d_4(aes_32t, t_dec(i,l), isb_data, w0, w1, w2, w3); | |
#endif | |
#if defined( LS1_SET ) | |
#if defined( FL1_SET ) | |
#undef LS1_SET | |
#else | |
d_1(aes_32t, t_dec(l,s), sb_data, w0); | |
#endif | |
#endif | |
#if defined( LS4_SET ) | |
#if defined( FL4_SET ) | |
#undef LS4_SET | |
#else | |
d_4(aes_32t, t_dec(l,s), sb_data, w0, w1, w2, w3); | |
#endif | |
#endif | |
#if defined( IM1_SET ) | |
d_1(aes_32t, t_dec(i,m), mm_data, v0); | |
#endif | |
#if defined( IM4_SET ) | |
d_4(aes_32t, t_dec(i,m), mm_data, v0, v1, v2, v3); | |
#endif | |
#if defined(__cplusplus) | |
} | |
#endif | |
#endif |