bsd/crypto/aes/gen/aestab.h

   1 /*
   2  ---------------------------------------------------------------------------
   3  Copyright (c) 2003, Dr Brian Gladman, Worcester, UK.   All rights reserved.
   4
   5  LICENSE TERMS
   6
   7  The free distribution and use of this software in both source and binary
   8  form is allowed (with or without changes) provided that:
   9
  10    1. distributions of this source code include the above copyright
  11       notice, this list of conditions and the following disclaimer;
  12
  13    2. distributions in binary form include the above copyright
  14       notice, this list of conditions and the following disclaimer
  15       in the documentation and/or other associated materials;
  16
  17    3. the copyright holder's name is not used to endorse products
  18       built using this software without specific written permission.
  19
  20  ALTERNATIVELY, provided that this notice is retained in full, this product
  21  may be distributed under the terms of the GNU General Public License (GPL),
  22  in which case the provisions of the GPL apply INSTEAD OF those given above.
  23
  24  DISCLAIMER
  25
  26  This software is provided 'as is' with no explicit or implied warranties
  27  in respect of its properties, including, but not limited to, correctness
  28  and/or fitness for purpose.
  29  ---------------------------------------------------------------------------
  30  Issue 28/01/2004
  31
  32  This file contains the code for declaring the tables needed to implement
  33  AES. The file aesopt.h is assumed to be included before this header file.
  34  If there are no global variables, the definitions here can be used to put
  35  the AES tables in a structure so that a pointer can then be added to the
  36  AES context to pass them to the AES routines that need them.   If this
  37  facility is used, the calling program has to ensure that this pointer is
  38  managed appropriately.  In particular, the value of the t_dec(in,it) item
  39  in the table structure must be set to zero in order to ensure that the
  40  tables are initialised. In practice the three code sequences in aeskey.c
  41  that control the calls to gen_tabs() and the gen_tabs() routine itself will
  42  have to be changed for a specific implementation. If global variables are
  43  available it will generally be preferable to use them with the precomputed
  44  FIXED_TABLES option that uses static global tables.
  45
  46  The following defines can be used to control the way the tables
  47  are defined, initialised and used in embedded environments that
  48  require special features for these purposes
  49
  50     the 't_dec' construction is used to declare fixed table arrays
  51     the 't_set' construction is used to set fixed table values
  52     the 't_use' construction is used to access fixed table values
  53
  54     256 byte tables:
  55
  56         t_xxx(s,box)    => forward S box
  57         t_xxx(i,box)    => inverse S box
  58
  59     256 32-bit word OR 4 x 256 32-bit word tables:
  60
  61         t_xxx(f,n)      => forward normal round
  62         t_xxx(f,l)      => forward last round
  63         t_xxx(i,n)      => inverse normal round
  64         t_xxx(i,l)      => inverse last round
  65         t_xxx(l,s)      => key schedule table
  66         t_xxx(i,m)      => key schedule table
  67
  68     Other variables and tables:
  69
  70         t_xxx(r,c)      => the rcon table
  71 */
  72
  73 #if !defined( _AESTAB_H )
  74 #define _AESTAB_H
  75
  76 #define t_dec(m,n) t_##m##n
  77 #define t_set(m,n) t_##m##n
  78 #define t_use(m,n) t_##m##n
  79
  80 #if defined(FIXED_TABLES)
  81 #define Const const
  82 #else
  83 #define Const
  84 #endif
  85
  86 #if defined(DO_TABLES)
  87 #define Extern
  88 #else
  89 #define Extern extern
  90 #endif
  91
  92 #if defined(_MSC_VER) && defined(TABLE_ALIGN)
  93 #define Align __declspec(align(TABLE_ALIGN))
  94 #else
  95 #define Align
  96 #endif
  97
  98 #if defined(__cplusplus)
  99 extern "C"
 100 {
 101 #endif
 102
 103 #if defined(DO_TABLES) && defined(FIXED_TABLES)
 104 #define d_1(t,n,b,e)       Align Const t n[256]    =   b(e)
 105 #define d_4(t,n,b,e,f,g,h) Align Const t n[4][256] = { b(e), b(f), b(g), b(h) }
 106 Extern Align Const aes_32t t_dec(r,c)[RC_LENGTH] = rc_data(w0);
 107 #else
 108 #define d_1(t,n,b,e)       Extern Align Const t n[256]
 109 #define d_4(t,n,b,e,f,g,h) Extern Align Const t n[4][256]
 110 Extern Align Const aes_32t t_dec(r,c)[RC_LENGTH];
 111 #endif
 112
 113 #if defined( SBX_SET )
 114     d_1(aes_08t, t_dec(s,box), sb_data, h0);
 115 #endif
 116 #if defined( ISB_SET )
 117     d_1(aes_08t, t_dec(i,box), isb_data, h0);
 118 #endif
 119
 120 #if defined( FT1_SET )
 121     d_1(aes_32t, t_dec(f,n), sb_data, u0);
 122 #endif
 123 #if defined( FT4_SET )
 124     d_4(aes_32t, t_dec(f,n), sb_data, u0, u1, u2, u3);
 125 #endif
 126
 127 #if defined( FL1_SET )
 128     d_1(aes_32t, t_dec(f,l), sb_data, w0);
 129 #endif
 130 #if defined( FL4_SET )
 131     d_4(aes_32t, t_dec(f,l), sb_data, w0, w1, w2, w3);
 132 #endif
 133
 134 #if defined( IT1_SET )
 135     d_1(aes_32t, t_dec(i,n), isb_data, v0);
 136 #endif
 137 #if defined( IT4_SET )
 138     d_4(aes_32t, t_dec(i,n), isb_data, v0, v1, v2, v3);
 139 #endif
 140
 141 #if defined( IL1_SET )
 142     d_1(aes_32t, t_dec(i,l), isb_data, w0);
 143 #endif
 144 #if defined( IL4_SET )
 145     d_4(aes_32t, t_dec(i,l), isb_data, w0, w1, w2, w3);
 146 #endif
 147
 148 #if defined( LS1_SET )
 149 #if defined( FL1_SET )
 150 #undef  LS1_SET
 151 #else
 152     d_1(aes_32t, t_dec(l,s), sb_data, w0);
 153 #endif
 154 #endif
 155
 156 #if defined( LS4_SET )
 157 #if defined( FL4_SET )
 158 #undef  LS4_SET
 159 #else
 160     d_4(aes_32t, t_dec(l,s), sb_data, w0, w1, w2, w3);
 161 #endif
 162 #endif
 163
 164 #if defined( IM1_SET )
 165     d_1(aes_32t, t_dec(i,m), mm_data, v0);
 166 #endif
 167 #if defined( IM4_SET )
 168     d_4(aes_32t, t_dec(i,m), mm_data, v0, v1, v2, v3);
 169 #endif
 170
 171 #if defined(__cplusplus)
 172 }
 173 #endif
 174
 175 #endif