166 lines
5 KiB
C
166 lines
5 KiB
C
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/*
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* ---------------------------------------------------------------------------
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* Copyright (c) 1998-2007, Brian Gladman, Worcester, UK. All rights reserved.
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*
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* LICENSE TERMS
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*
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* The free distribution and use of this software is allowed (with or without
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* changes) provided that:
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*
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* 1. source code distributions include the above copyright notice, this
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* list of conditions and the following disclaimer;
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*
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* 2. 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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*
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* 3. the name of the copyright holder is not used to endorse products
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* built using this software without specific written permission.
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*
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* DISCLAIMER
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*
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* This software is provided 'as is' with no explicit or implied warranties
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* in respect of its properties, including, but not limited to, correctness
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* and/or fitness for purpose.
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* ---------------------------------------------------------------------------
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* Issue Date: 20/12/2007
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*
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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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* FIXED_TABLES option that uses static global tables.
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*
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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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*
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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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*
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* 256 byte tables:
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*
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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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*
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* 256 32-bit word OR 4 x 256 32-bit word tables:
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*
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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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*
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* Other variables and tables:
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*
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* t_xxx(r, c) => the rcon table
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*/
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/*
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* OpenSolaris OS modifications
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*
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* 1. Added __cplusplus and _AESTAB_H header guards
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* 2. Added header file sys/types.h
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* 3. Remove code defined for _MSC_VER
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* 4. Changed all variables to "static const"
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* 5. Changed uint_8t and uint_32t to uint8_t and uint32_t
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* 6. Cstyled and hdrchk code
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*/
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#ifndef _AESTAB_H
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#define _AESTAB_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <sys/types.h>
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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(DO_TABLES) && defined(FIXED_TABLES)
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#define d_1(t, n, b, e) static const t n[256] = b(e)
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#define d_4(t, n, b, e, f, g, h) static const t n[4][256] = \
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{b(e), b(f), b(g), b(h)}
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static 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) static const t n[256]
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#define d_4(t, n, b, e, f, g, h) static const t n[4][256]
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static 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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#ifdef __cplusplus
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}
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#endif
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#endif /* _AESTAB_H */
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