xnu-792.tar.gz

[apple/xnu.git] / bsd / crypto / aes / aestab.h

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