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173 lines
5.0 KiB
173 lines
5.0 KiB
/* |
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--------------------------------------------------------------------------- |
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Copyright (c) 1998-2013, Brian Gladman, Worcester, UK. All rights reserved. |
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The redistribution and use of this software (with or without changes) |
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is allowed without the payment of fees or royalties provided that: |
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source code distributions include the above copyright notice, this |
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list of conditions and the following disclaimer; |
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binary distributions include the above copyright notice, this list |
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of conditions and the following disclaimer in their documentation. |
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This software is provided 'as is' with no explicit or implied warranties |
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in respect of its operation, including, but not limited to, correctness |
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and fitness for purpose. |
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--------------------------------------------------------------------------- |
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Issue Date: 20/12/2007 |
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This file contains the code for declaring the tables needed to implement |
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AES. The file aesopt.h is assumed to be included before this header file. |
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If there are no global variables, the definitions here can be used to put |
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the AES tables in a structure so that a pointer can then be added to the |
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AES context to pass them to the AES routines that need them. If this |
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facility is used, the calling program has to ensure that this pointer is |
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managed appropriately. In particular, the value of the t_dec(in,it) item |
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in the table structure must be set to zero in order to ensure that the |
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tables are initialised. In practice the three code sequences in aeskey.c |
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that control the calls to aes_init() and the aes_init() routine itself will |
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have to be changed for a specific implementation. If global variables are |
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available it will generally be preferable to use them with the precomputed |
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STATIC_TABLES option that uses static global tables. |
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The following defines can be used to control the way the tables |
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are defined, initialised and used in embedded environments that |
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require special features for these purposes |
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the 't_dec' construction is used to declare fixed table arrays |
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the 't_set' construction is used to set fixed table values |
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the 't_use' construction is used to access fixed table values |
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256 byte tables: |
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t_xxx(s,box) => forward S box |
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t_xxx(i,box) => inverse S box |
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256 32-bit word OR 4 x 256 32-bit word tables: |
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t_xxx(f,n) => forward normal round |
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t_xxx(f,l) => forward last round |
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t_xxx(i,n) => inverse normal round |
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t_xxx(i,l) => inverse last round |
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t_xxx(l,s) => key schedule table |
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t_xxx(i,m) => key schedule table |
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Other variables and tables: |
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t_xxx(r,c) => the rcon table |
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*/ |
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#if !defined( _AESTAB_H ) |
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#define _AESTAB_H |
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#if defined(__cplusplus) |
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extern "C" { |
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#endif |
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#define t_dec(m,n) t_##m##n |
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#define t_set(m,n) t_##m##n |
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#define t_use(m,n) t_##m##n |
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#if defined(STATIC_TABLES) |
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# if !defined( __GNUC__ ) && (defined( __MSDOS__ ) || defined( __WIN16__ )) |
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/* make tables far data to avoid using too much DGROUP space (PG) */ |
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# define CONST const far |
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# else |
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# define CONST const |
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# endif |
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#else |
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# define CONST |
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#endif |
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#if defined(DO_TABLES) |
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# define EXTERN |
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#else |
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# define EXTERN extern |
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#endif |
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#if defined(_MSC_VER) && defined(TABLE_ALIGN) |
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#define ALIGN __declspec(align(TABLE_ALIGN)) |
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#else |
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#define ALIGN |
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#endif |
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#if defined( __WATCOMC__ ) && ( __WATCOMC__ >= 1100 ) |
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# define XP_DIR __cdecl |
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#else |
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# define XP_DIR |
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#endif |
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#if defined(DO_TABLES) && defined(STATIC_TABLES) |
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#define d_1(t,n,b,e) EXTERN ALIGN CONST XP_DIR t n[256] = b(e) |
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#define d_4(t,n,b,e,f,g,h) EXTERN ALIGN CONST XP_DIR t n[4][256] = { b(e), b(f), b(g), b(h) } |
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EXTERN ALIGN CONST uint32_t t_dec(r,c)[RC_LENGTH] = rc_data(w0); |
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#else |
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#define d_1(t,n,b,e) EXTERN ALIGN CONST XP_DIR t n[256] |
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#define d_4(t,n,b,e,f,g,h) EXTERN ALIGN CONST XP_DIR t n[4][256] |
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EXTERN ALIGN CONST uint32_t t_dec(r,c)[RC_LENGTH]; |
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#endif |
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#if defined( SBX_SET ) |
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d_1(uint8_t, t_dec(s,box), sb_data, h0); |
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#endif |
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#if defined( ISB_SET ) |
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d_1(uint8_t, t_dec(i,box), isb_data, h0); |
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#endif |
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#if defined( FT1_SET ) |
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d_1(uint32_t, t_dec(f,n), sb_data, u0); |
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#endif |
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#if defined( FT4_SET ) |
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d_4(uint32_t, t_dec(f,n), sb_data, u0, u1, u2, u3); |
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#endif |
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#if defined( FL1_SET ) |
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d_1(uint32_t, t_dec(f,l), sb_data, w0); |
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#endif |
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#if defined( FL4_SET ) |
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d_4(uint32_t, t_dec(f,l), sb_data, w0, w1, w2, w3); |
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#endif |
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#if defined( IT1_SET ) |
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d_1(uint32_t, t_dec(i,n), isb_data, v0); |
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#endif |
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#if defined( IT4_SET ) |
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d_4(uint32_t, t_dec(i,n), isb_data, v0, v1, v2, v3); |
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#endif |
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#if defined( IL1_SET ) |
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d_1(uint32_t, t_dec(i,l), isb_data, w0); |
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#endif |
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#if defined( IL4_SET ) |
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d_4(uint32_t, t_dec(i,l), isb_data, w0, w1, w2, w3); |
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#endif |
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#if defined( LS1_SET ) |
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#if defined( FL1_SET ) |
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#undef LS1_SET |
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#else |
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d_1(uint32_t, t_dec(l,s), sb_data, w0); |
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#endif |
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#endif |
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#if defined( LS4_SET ) |
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#if defined( FL4_SET ) |
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#undef LS4_SET |
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#else |
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d_4(uint32_t, t_dec(l,s), sb_data, w0, w1, w2, w3); |
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#endif |
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#endif |
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#if defined( IM1_SET ) |
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d_1(uint32_t, t_dec(i,m), mm_data, v0); |
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#endif |
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#if defined( IM4_SET ) |
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d_4(uint32_t, t_dec(i,m), mm_data, v0, v1, v2, v3); |
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#endif |
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#if defined(__cplusplus) |
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} |
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#endif |
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#endif
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