VeraCrypt
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+/*
+ ---------------------------------------------------------------------------
+ Copyright (c) 1998-2007, Brian Gladman, Worcester, UK. All rights reserved.
+
+ LICENSE TERMS
+
+ The free distribution and use of this software is allowed (with or without
+ changes) provided that:
+
+ 1. source code distributions include the above copyright notice, this
+ list of conditions and the following disclaimer;
+
+ 2. binary distributions include the above copyright notice, this list
+ of conditions and the following disclaimer in their documentation;
+
+ 3. the name of the copyright holder is not used to endorse products
+ built using this software without specific written permission.
+
+ 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 Date: 20/12/2007
+
+ 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 aes_init() and the aes_init() 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)
+# if !defined( __GNUC__ ) && (defined( __MSDOS__ ) || defined( __WIN16__ ))
+/* make tables far data to avoid using too much DGROUP space (PG) */
+# define CONST const far
+# else
+# define CONST const
+# endif
+#else
+# define CONST
+#endif
+
+#if defined(__cplusplus)
+# define EXTERN extern "C"
+#elif 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( __WATCOMC__ ) && ( __WATCOMC__ >= 1100 )
+# define XP_DIR __cdecl
+#else
+# define XP_DIR
+#endif
+
+#if defined(DO_TABLES) && defined(FIXED_TABLES)
+#define d_1(t,n,b,e) EXTERN ALIGN CONST XP_DIR t n[256] = b(e)
+#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) }
+EXTERN ALIGN CONST uint_32t t_dec(r,c)[RC_LENGTH] = rc_data(w0);
+#else
+#define d_1(t,n,b,e) EXTERN ALIGN CONST XP_DIR t n[256]
+#define d_4(t,n,b,e,f,g,h) EXTERN ALIGN CONST XP_DIR t n[4][256]
+EXTERN ALIGN CONST uint_32t t_dec(r,c)[RC_LENGTH];
+#endif
+
+#if defined( SBX_SET )
+ d_1(uint_8t, t_dec(s,box), sb_data, h0);
+#endif
+#if defined( ISB_SET )
+ d_1(uint_8t, t_dec(i,box), isb_data, h0);
+#endif
+
+#if defined( FT1_SET )
+ d_1(uint_32t, t_dec(f,n), sb_data, u0);
+#endif
+#if defined( FT4_SET )
+ d_4(uint_32t, t_dec(f,n), sb_data, u0, u1, u2, u3);
+#endif
+
+#if defined( FL1_SET )
+ d_1(uint_32t, t_dec(f,l), sb_data, w0);
+#endif
+#if defined( FL4_SET )
+ d_4(uint_32t, t_dec(f,l), sb_data, w0, w1, w2, w3);
+#endif
+
+#if defined( IT1_SET )
+ d_1(uint_32t, t_dec(i,n), isb_data, v0);
+#endif
+#if defined( IT4_SET )
+ d_4(uint_32t, t_dec(i,n), isb_data, v0, v1, v2, v3);
+#endif
+
+#if defined( IL1_SET )
+ d_1(uint_32t, t_dec(i,l), isb_data, w0);
+#endif
+#if defined( IL4_SET )
+ d_4(uint_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(uint_32t, t_dec(l,s), sb_data, w0);
+#endif
+#endif
+
+#if defined( LS4_SET )
+#if defined( FL4_SET )
+#undef LS4_SET
+#else
+ d_4(uint_32t, t_dec(l,s), sb_data, w0, w1, w2, w3);
+#endif
+#endif
+
+#if defined( IM1_SET )
+ d_1(uint_32t, t_dec(i,m), mm_data, v0);
+#endif
+#if defined( IM4_SET )
+ d_4(uint_32t, t_dec(i,m), mm_data, v0, v1, v2, v3);
+#endif
+
+#endif