| /* | |
| --------------------------------------------------------------------------- | |
| 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 |