/* --------------------------------------------------------------------------- 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 ='#n60'>60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482