Alexandre Lision | 7fd5d3d | 2013-12-04 13:06:40 -0500 | [diff] [blame] | 1 | /* |
| 2 | --------------------------------------------------------------------------- |
| 3 | Copyright (c) 1998-2010, Brian Gladman, Worcester, UK. All rights reserved. |
| 4 | |
| 5 | The redistribution and use of this software (with or without changes) |
| 6 | is allowed without the payment of fees or royalties provided that: |
| 7 | |
| 8 | source code distributions include the above copyright notice, this |
| 9 | list of conditions and the following disclaimer; |
| 10 | |
| 11 | binary distributions include the above copyright notice, this list |
| 12 | of conditions and the following disclaimer in their documentation. |
| 13 | |
| 14 | This software is provided 'as is' with no explicit or implied warranties |
| 15 | in respect of its operation, including, but not limited to, correctness |
| 16 | and fitness for purpose. |
| 17 | --------------------------------------------------------------------------- |
| 18 | Issue Date: 20/12/2007 |
| 19 | |
| 20 | These subroutines implement multiple block AES modes for ECB, CBC, CFB, |
| 21 | OFB and CTR encryption, The code provides support for the VIA Advanced |
| 22 | Cryptography Engine (ACE). |
| 23 | |
| 24 | NOTE: In the following subroutines, the AES contexts (ctx) must be |
| 25 | 16 byte aligned if VIA ACE is being used |
| 26 | */ |
| 27 | |
| 28 | #include <string.h> |
| 29 | #include <assert.h> |
| 30 | |
| 31 | #include "aesopt.h" |
| 32 | |
| 33 | #if defined( AES_MODES ) |
| 34 | #if defined(__cplusplus) |
| 35 | extern "C" |
| 36 | { |
| 37 | #endif |
| 38 | |
| 39 | #if defined( _MSC_VER ) && ( _MSC_VER > 800 ) |
| 40 | #pragma intrinsic(memcpy) |
| 41 | #endif |
| 42 | |
| 43 | #define BFR_BLOCKS 8 |
| 44 | |
| 45 | /* These values are used to detect long word alignment in order to */ |
| 46 | /* speed up some buffer operations. This facility may not work on */ |
| 47 | /* some machines so this define can be commented out if necessary */ |
| 48 | |
| 49 | #define FAST_BUFFER_OPERATIONS |
| 50 | |
| 51 | #define lp32(x) ((uint_32t*)(x)) |
| 52 | |
| 53 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 54 | |
| 55 | #include "aes_via_ace.h" |
| 56 | |
| 57 | #pragma pack(16) |
| 58 | |
| 59 | aligned_array(unsigned long, enc_gen_table, 12, 16) = NEH_ENC_GEN_DATA; |
| 60 | aligned_array(unsigned long, enc_load_table, 12, 16) = NEH_ENC_LOAD_DATA; |
| 61 | aligned_array(unsigned long, enc_hybrid_table, 12, 16) = NEH_ENC_HYBRID_DATA; |
| 62 | aligned_array(unsigned long, dec_gen_table, 12, 16) = NEH_DEC_GEN_DATA; |
| 63 | aligned_array(unsigned long, dec_load_table, 12, 16) = NEH_DEC_LOAD_DATA; |
| 64 | aligned_array(unsigned long, dec_hybrid_table, 12, 16) = NEH_DEC_HYBRID_DATA; |
| 65 | |
| 66 | /* NOTE: These control word macros must only be used after */ |
| 67 | /* a key has been set up because they depend on key size */ |
| 68 | /* See the VIA ACE documentation for key type information */ |
| 69 | /* and aes_via_ace.h for non-default NEH_KEY_TYPE values */ |
| 70 | |
| 71 | #ifndef NEH_KEY_TYPE |
| 72 | # define NEH_KEY_TYPE NEH_HYBRID |
| 73 | #endif |
| 74 | |
| 75 | #if NEH_KEY_TYPE == NEH_LOAD |
| 76 | #define kd_adr(c) ((uint_8t*)(c)->ks) |
| 77 | #elif NEH_KEY_TYPE == NEH_GENERATE |
| 78 | #define kd_adr(c) ((uint_8t*)(c)->ks + (c)->inf.b[0]) |
| 79 | #elif NEH_KEY_TYPE == NEH_HYBRID |
| 80 | #define kd_adr(c) ((uint_8t*)(c)->ks + ((c)->inf.b[0] == 160 ? 160 : 0)) |
| 81 | #else |
| 82 | #error no key type defined for VIA ACE |
| 83 | #endif |
| 84 | |
| 85 | #else |
| 86 | |
| 87 | #define aligned_array(type, name, no, stride) type name[no] |
| 88 | #define aligned_auto(type, name, no, stride) type name[no] |
| 89 | |
| 90 | #endif |
| 91 | |
| 92 | #if defined( _MSC_VER ) && _MSC_VER > 1200 |
| 93 | |
| 94 | #define via_cwd(cwd, ty, dir, len) \ |
| 95 | unsigned long* cwd = (dir##_##ty##_table + ((len - 128) >> 4)) |
| 96 | |
| 97 | #else |
| 98 | |
| 99 | #define via_cwd(cwd, ty, dir, len) \ |
| 100 | aligned_auto(unsigned long, cwd, 4, 16); \ |
| 101 | cwd[1] = cwd[2] = cwd[3] = 0; \ |
| 102 | cwd[0] = neh_##dir##_##ty##_key(len) |
| 103 | |
| 104 | #endif |
| 105 | |
| 106 | /* test the code for detecting and setting pointer alignment */ |
| 107 | |
| 108 | AES_RETURN aes_test_alignment_detection(unsigned int n) /* 4 <= n <= 16 */ |
| 109 | { uint_8t p[16]; |
| 110 | uint_32t i, count_eq = 0, count_neq = 0; |
| 111 | |
| 112 | if(n < 4 || n > 16) |
| 113 | return EXIT_FAILURE; |
| 114 | |
| 115 | for(i = 0; i < n; ++i) |
| 116 | { |
| 117 | uint_8t *qf = ALIGN_FLOOR(p + i, n), |
| 118 | *qh = ALIGN_CEIL(p + i, n); |
| 119 | |
| 120 | if(qh == qf) |
| 121 | ++count_eq; |
| 122 | else if(qh == qf + n) |
| 123 | ++count_neq; |
| 124 | else |
| 125 | return EXIT_FAILURE; |
| 126 | } |
| 127 | return (count_eq != 1 || count_neq != n - 1 ? EXIT_FAILURE : EXIT_SUCCESS); |
| 128 | } |
| 129 | |
| 130 | AES_RETURN aes_mode_reset(aes_encrypt_ctx ctx[1]) |
| 131 | { |
| 132 | ctx->inf.b[2] = 0; |
| 133 | return EXIT_SUCCESS; |
| 134 | } |
| 135 | |
| 136 | AES_RETURN aes_ecb_encrypt(const unsigned char *ibuf, unsigned char *obuf, |
| 137 | int len, const aes_encrypt_ctx ctx[1]) |
| 138 | { int nb = len >> 4; |
| 139 | |
| 140 | if(len & (AES_BLOCK_SIZE - 1)) |
| 141 | return EXIT_FAILURE; |
| 142 | |
| 143 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 144 | |
| 145 | if(ctx->inf.b[1] == 0xff) |
| 146 | { uint_8t *ksp = (uint_8t*)(ctx->ks); |
| 147 | via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192); |
| 148 | |
| 149 | if(ALIGN_OFFSET( ctx, 16 )) |
| 150 | return EXIT_FAILURE; |
| 151 | |
| 152 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 )) |
| 153 | { |
| 154 | via_ecb_op5(ksp, cwd, ibuf, obuf, nb); |
| 155 | } |
| 156 | else |
| 157 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 158 | uint_8t *ip, *op; |
| 159 | |
| 160 | while(nb) |
| 161 | { |
| 162 | int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb); |
| 163 | |
| 164 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 165 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 166 | |
| 167 | if(ip != ibuf) |
| 168 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 169 | |
| 170 | via_ecb_op5(ksp, cwd, ip, op, m); |
| 171 | |
| 172 | if(op != obuf) |
| 173 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 174 | |
| 175 | ibuf += m * AES_BLOCK_SIZE; |
| 176 | obuf += m * AES_BLOCK_SIZE; |
| 177 | nb -= m; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | return EXIT_SUCCESS; |
| 182 | } |
| 183 | |
| 184 | #endif |
| 185 | |
| 186 | #if !defined( ASSUME_VIA_ACE_PRESENT ) |
| 187 | while(nb--) |
| 188 | { |
| 189 | if(aes_encrypt(ibuf, obuf, ctx) != EXIT_SUCCESS) |
| 190 | return EXIT_FAILURE; |
| 191 | ibuf += AES_BLOCK_SIZE; |
| 192 | obuf += AES_BLOCK_SIZE; |
| 193 | } |
| 194 | #endif |
| 195 | return EXIT_SUCCESS; |
| 196 | } |
| 197 | |
| 198 | AES_RETURN aes_ecb_decrypt(const unsigned char *ibuf, unsigned char *obuf, |
| 199 | int len, const aes_decrypt_ctx ctx[1]) |
| 200 | { int nb = len >> 4; |
| 201 | |
| 202 | if(len & (AES_BLOCK_SIZE - 1)) |
| 203 | return EXIT_FAILURE; |
| 204 | |
| 205 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 206 | |
| 207 | if(ctx->inf.b[1] == 0xff) |
| 208 | { uint_8t *ksp = kd_adr(ctx); |
| 209 | via_cwd(cwd, hybrid, dec, 2 * ctx->inf.b[0] - 192); |
| 210 | |
| 211 | if(ALIGN_OFFSET( ctx, 16 )) |
| 212 | return EXIT_FAILURE; |
| 213 | |
| 214 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 )) |
| 215 | { |
| 216 | via_ecb_op5(ksp, cwd, ibuf, obuf, nb); |
| 217 | } |
| 218 | else |
| 219 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 220 | uint_8t *ip, *op; |
| 221 | |
| 222 | while(nb) |
| 223 | { |
| 224 | int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb); |
| 225 | |
| 226 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 227 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 228 | |
| 229 | if(ip != ibuf) |
| 230 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 231 | |
| 232 | via_ecb_op5(ksp, cwd, ip, op, m); |
| 233 | |
| 234 | if(op != obuf) |
| 235 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 236 | |
| 237 | ibuf += m * AES_BLOCK_SIZE; |
| 238 | obuf += m * AES_BLOCK_SIZE; |
| 239 | nb -= m; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | return EXIT_SUCCESS; |
| 244 | } |
| 245 | |
| 246 | #endif |
| 247 | |
| 248 | #if !defined( ASSUME_VIA_ACE_PRESENT ) |
| 249 | while(nb--) |
| 250 | { |
| 251 | if(aes_decrypt(ibuf, obuf, ctx) != EXIT_SUCCESS) |
| 252 | return EXIT_FAILURE; |
| 253 | ibuf += AES_BLOCK_SIZE; |
| 254 | obuf += AES_BLOCK_SIZE; |
| 255 | } |
| 256 | #endif |
| 257 | return EXIT_SUCCESS; |
| 258 | } |
| 259 | |
| 260 | AES_RETURN aes_cbc_encrypt(const unsigned char *ibuf, unsigned char *obuf, |
| 261 | int len, unsigned char *iv, const aes_encrypt_ctx ctx[1]) |
| 262 | { int nb = len >> 4; |
| 263 | |
| 264 | if(len & (AES_BLOCK_SIZE - 1)) |
| 265 | return EXIT_FAILURE; |
| 266 | |
| 267 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 268 | |
| 269 | if(ctx->inf.b[1] == 0xff) |
| 270 | { uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv; |
| 271 | aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16); |
| 272 | via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192); |
| 273 | |
| 274 | if(ALIGN_OFFSET( ctx, 16 )) |
| 275 | return EXIT_FAILURE; |
| 276 | |
| 277 | if(ALIGN_OFFSET( iv, 16 )) /* ensure an aligned iv */ |
| 278 | { |
| 279 | ivp = liv; |
| 280 | memcpy(liv, iv, AES_BLOCK_SIZE); |
| 281 | } |
| 282 | |
| 283 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ) && !ALIGN_OFFSET( iv, 16 )) |
| 284 | { |
| 285 | via_cbc_op7(ksp, cwd, ibuf, obuf, nb, ivp, ivp); |
| 286 | } |
| 287 | else |
| 288 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 289 | uint_8t *ip, *op; |
| 290 | |
| 291 | while(nb) |
| 292 | { |
| 293 | int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb); |
| 294 | |
| 295 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 296 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 297 | |
| 298 | if(ip != ibuf) |
| 299 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 300 | |
| 301 | via_cbc_op7(ksp, cwd, ip, op, m, ivp, ivp); |
| 302 | |
| 303 | if(op != obuf) |
| 304 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 305 | |
| 306 | ibuf += m * AES_BLOCK_SIZE; |
| 307 | obuf += m * AES_BLOCK_SIZE; |
| 308 | nb -= m; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | if(iv != ivp) |
| 313 | memcpy(iv, ivp, AES_BLOCK_SIZE); |
| 314 | |
| 315 | return EXIT_SUCCESS; |
| 316 | } |
| 317 | |
| 318 | #endif |
| 319 | |
| 320 | #if !defined( ASSUME_VIA_ACE_PRESENT ) |
| 321 | # ifdef FAST_BUFFER_OPERATIONS |
| 322 | if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( iv, 4 )) |
| 323 | while(nb--) |
| 324 | { |
| 325 | lp32(iv)[0] ^= lp32(ibuf)[0]; |
| 326 | lp32(iv)[1] ^= lp32(ibuf)[1]; |
| 327 | lp32(iv)[2] ^= lp32(ibuf)[2]; |
| 328 | lp32(iv)[3] ^= lp32(ibuf)[3]; |
| 329 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 330 | return EXIT_FAILURE; |
| 331 | memcpy(obuf, iv, AES_BLOCK_SIZE); |
| 332 | ibuf += AES_BLOCK_SIZE; |
| 333 | obuf += AES_BLOCK_SIZE; |
| 334 | } |
| 335 | else |
| 336 | # endif |
| 337 | while(nb--) |
| 338 | { |
| 339 | iv[ 0] ^= ibuf[ 0]; iv[ 1] ^= ibuf[ 1]; |
| 340 | iv[ 2] ^= ibuf[ 2]; iv[ 3] ^= ibuf[ 3]; |
| 341 | iv[ 4] ^= ibuf[ 4]; iv[ 5] ^= ibuf[ 5]; |
| 342 | iv[ 6] ^= ibuf[ 6]; iv[ 7] ^= ibuf[ 7]; |
| 343 | iv[ 8] ^= ibuf[ 8]; iv[ 9] ^= ibuf[ 9]; |
| 344 | iv[10] ^= ibuf[10]; iv[11] ^= ibuf[11]; |
| 345 | iv[12] ^= ibuf[12]; iv[13] ^= ibuf[13]; |
| 346 | iv[14] ^= ibuf[14]; iv[15] ^= ibuf[15]; |
| 347 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 348 | return EXIT_FAILURE; |
| 349 | memcpy(obuf, iv, AES_BLOCK_SIZE); |
| 350 | ibuf += AES_BLOCK_SIZE; |
| 351 | obuf += AES_BLOCK_SIZE; |
| 352 | } |
| 353 | #endif |
| 354 | return EXIT_SUCCESS; |
| 355 | } |
| 356 | |
| 357 | AES_RETURN aes_cbc_decrypt(const unsigned char *ibuf, unsigned char *obuf, |
| 358 | int len, unsigned char *iv, const aes_decrypt_ctx ctx[1]) |
| 359 | { unsigned char tmp[AES_BLOCK_SIZE]; |
| 360 | int nb = len >> 4; |
| 361 | |
| 362 | if(len & (AES_BLOCK_SIZE - 1)) |
| 363 | return EXIT_FAILURE; |
| 364 | |
| 365 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 366 | |
| 367 | if(ctx->inf.b[1] == 0xff) |
| 368 | { uint_8t *ksp = kd_adr(ctx), *ivp = iv; |
| 369 | aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16); |
| 370 | via_cwd(cwd, hybrid, dec, 2 * ctx->inf.b[0] - 192); |
| 371 | |
| 372 | if(ALIGN_OFFSET( ctx, 16 )) |
| 373 | return EXIT_FAILURE; |
| 374 | |
| 375 | if(ALIGN_OFFSET( iv, 16 )) /* ensure an aligned iv */ |
| 376 | { |
| 377 | ivp = liv; |
| 378 | memcpy(liv, iv, AES_BLOCK_SIZE); |
| 379 | } |
| 380 | |
| 381 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 ) && !ALIGN_OFFSET( iv, 16 )) |
| 382 | { |
| 383 | via_cbc_op6(ksp, cwd, ibuf, obuf, nb, ivp); |
| 384 | } |
| 385 | else |
| 386 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 387 | uint_8t *ip, *op; |
| 388 | |
| 389 | while(nb) |
| 390 | { |
| 391 | int m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb); |
| 392 | |
| 393 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 394 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 395 | |
| 396 | if(ip != ibuf) |
| 397 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 398 | |
| 399 | via_cbc_op6(ksp, cwd, ip, op, m, ivp); |
| 400 | |
| 401 | if(op != obuf) |
| 402 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 403 | |
| 404 | ibuf += m * AES_BLOCK_SIZE; |
| 405 | obuf += m * AES_BLOCK_SIZE; |
| 406 | nb -= m; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | if(iv != ivp) |
| 411 | memcpy(iv, ivp, AES_BLOCK_SIZE); |
| 412 | |
| 413 | return EXIT_SUCCESS; |
| 414 | } |
| 415 | #endif |
| 416 | |
| 417 | #if !defined( ASSUME_VIA_ACE_PRESENT ) |
| 418 | # ifdef FAST_BUFFER_OPERATIONS |
| 419 | if(!ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( iv, 4 )) |
| 420 | while(nb--) |
| 421 | { |
| 422 | memcpy(tmp, ibuf, AES_BLOCK_SIZE); |
| 423 | if(aes_decrypt(ibuf, obuf, ctx) != EXIT_SUCCESS) |
| 424 | return EXIT_FAILURE; |
| 425 | lp32(obuf)[0] ^= lp32(iv)[0]; |
| 426 | lp32(obuf)[1] ^= lp32(iv)[1]; |
| 427 | lp32(obuf)[2] ^= lp32(iv)[2]; |
| 428 | lp32(obuf)[3] ^= lp32(iv)[3]; |
| 429 | memcpy(iv, tmp, AES_BLOCK_SIZE); |
| 430 | ibuf += AES_BLOCK_SIZE; |
| 431 | obuf += AES_BLOCK_SIZE; |
| 432 | } |
| 433 | else |
| 434 | # endif |
| 435 | while(nb--) |
| 436 | { |
| 437 | memcpy(tmp, ibuf, AES_BLOCK_SIZE); |
| 438 | if(aes_decrypt(ibuf, obuf, ctx) != EXIT_SUCCESS) |
| 439 | return EXIT_FAILURE; |
| 440 | obuf[ 0] ^= iv[ 0]; obuf[ 1] ^= iv[ 1]; |
| 441 | obuf[ 2] ^= iv[ 2]; obuf[ 3] ^= iv[ 3]; |
| 442 | obuf[ 4] ^= iv[ 4]; obuf[ 5] ^= iv[ 5]; |
| 443 | obuf[ 6] ^= iv[ 6]; obuf[ 7] ^= iv[ 7]; |
| 444 | obuf[ 8] ^= iv[ 8]; obuf[ 9] ^= iv[ 9]; |
| 445 | obuf[10] ^= iv[10]; obuf[11] ^= iv[11]; |
| 446 | obuf[12] ^= iv[12]; obuf[13] ^= iv[13]; |
| 447 | obuf[14] ^= iv[14]; obuf[15] ^= iv[15]; |
| 448 | memcpy(iv, tmp, AES_BLOCK_SIZE); |
| 449 | ibuf += AES_BLOCK_SIZE; |
| 450 | obuf += AES_BLOCK_SIZE; |
| 451 | } |
| 452 | #endif |
| 453 | return EXIT_SUCCESS; |
| 454 | } |
| 455 | |
| 456 | AES_RETURN aes_cfb_encrypt(const unsigned char *ibuf, unsigned char *obuf, |
| 457 | int len, unsigned char *iv, aes_encrypt_ctx ctx[1]) |
| 458 | { int cnt = 0, b_pos = (int)ctx->inf.b[2], nb; |
| 459 | |
| 460 | if(b_pos) /* complete any partial block */ |
| 461 | { |
| 462 | while(b_pos < AES_BLOCK_SIZE && cnt < len) |
| 463 | { |
| 464 | *obuf++ = (iv[b_pos++] ^= *ibuf++); |
| 465 | cnt++; |
| 466 | } |
| 467 | |
| 468 | b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos); |
| 469 | } |
| 470 | |
| 471 | if((nb = (len - cnt) >> 4) != 0) /* process whole blocks */ |
| 472 | { |
| 473 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 474 | |
| 475 | if(ctx->inf.b[1] == 0xff) |
| 476 | { int m; |
| 477 | uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv; |
| 478 | aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16); |
| 479 | via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192); |
| 480 | |
| 481 | if(ALIGN_OFFSET( ctx, 16 )) |
| 482 | return EXIT_FAILURE; |
| 483 | |
| 484 | if(ALIGN_OFFSET( iv, 16 )) /* ensure an aligned iv */ |
| 485 | { |
| 486 | ivp = liv; |
| 487 | memcpy(liv, iv, AES_BLOCK_SIZE); |
| 488 | } |
| 489 | |
| 490 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 )) |
| 491 | { |
| 492 | via_cfb_op7(ksp, cwd, ibuf, obuf, nb, ivp, ivp); |
| 493 | ibuf += nb * AES_BLOCK_SIZE; |
| 494 | obuf += nb * AES_BLOCK_SIZE; |
| 495 | cnt += nb * AES_BLOCK_SIZE; |
| 496 | } |
| 497 | else /* input, output or both are unaligned */ |
| 498 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 499 | uint_8t *ip, *op; |
| 500 | |
| 501 | while(nb) |
| 502 | { |
| 503 | m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb), nb -= m; |
| 504 | |
| 505 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 506 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 507 | |
| 508 | if(ip != ibuf) |
| 509 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 510 | |
| 511 | via_cfb_op7(ksp, cwd, ip, op, m, ivp, ivp); |
| 512 | |
| 513 | if(op != obuf) |
| 514 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 515 | |
| 516 | ibuf += m * AES_BLOCK_SIZE; |
| 517 | obuf += m * AES_BLOCK_SIZE; |
| 518 | cnt += m * AES_BLOCK_SIZE; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | if(ivp != iv) |
| 523 | memcpy(iv, ivp, AES_BLOCK_SIZE); |
| 524 | } |
| 525 | #else |
| 526 | # ifdef FAST_BUFFER_OPERATIONS |
| 527 | if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( iv, 4 )) |
| 528 | while(cnt + AES_BLOCK_SIZE <= len) |
| 529 | { |
| 530 | assert(b_pos == 0); |
| 531 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 532 | return EXIT_FAILURE; |
| 533 | lp32(obuf)[0] = lp32(iv)[0] ^= lp32(ibuf)[0]; |
| 534 | lp32(obuf)[1] = lp32(iv)[1] ^= lp32(ibuf)[1]; |
| 535 | lp32(obuf)[2] = lp32(iv)[2] ^= lp32(ibuf)[2]; |
| 536 | lp32(obuf)[3] = lp32(iv)[3] ^= lp32(ibuf)[3]; |
| 537 | ibuf += AES_BLOCK_SIZE; |
| 538 | obuf += AES_BLOCK_SIZE; |
| 539 | cnt += AES_BLOCK_SIZE; |
| 540 | } |
| 541 | else |
| 542 | # endif |
| 543 | while(cnt + AES_BLOCK_SIZE <= len) |
| 544 | { |
| 545 | assert(b_pos == 0); |
| 546 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 547 | return EXIT_FAILURE; |
| 548 | obuf[ 0] = iv[ 0] ^= ibuf[ 0]; obuf[ 1] = iv[ 1] ^= ibuf[ 1]; |
| 549 | obuf[ 2] = iv[ 2] ^= ibuf[ 2]; obuf[ 3] = iv[ 3] ^= ibuf[ 3]; |
| 550 | obuf[ 4] = iv[ 4] ^= ibuf[ 4]; obuf[ 5] = iv[ 5] ^= ibuf[ 5]; |
| 551 | obuf[ 6] = iv[ 6] ^= ibuf[ 6]; obuf[ 7] = iv[ 7] ^= ibuf[ 7]; |
| 552 | obuf[ 8] = iv[ 8] ^= ibuf[ 8]; obuf[ 9] = iv[ 9] ^= ibuf[ 9]; |
| 553 | obuf[10] = iv[10] ^= ibuf[10]; obuf[11] = iv[11] ^= ibuf[11]; |
| 554 | obuf[12] = iv[12] ^= ibuf[12]; obuf[13] = iv[13] ^= ibuf[13]; |
| 555 | obuf[14] = iv[14] ^= ibuf[14]; obuf[15] = iv[15] ^= ibuf[15]; |
| 556 | ibuf += AES_BLOCK_SIZE; |
| 557 | obuf += AES_BLOCK_SIZE; |
| 558 | cnt += AES_BLOCK_SIZE; |
| 559 | } |
| 560 | #endif |
| 561 | } |
| 562 | |
| 563 | while(cnt < len) |
| 564 | { |
| 565 | if(!b_pos && aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 566 | return EXIT_FAILURE; |
| 567 | |
| 568 | while(cnt < len && b_pos < AES_BLOCK_SIZE) |
| 569 | { |
| 570 | *obuf++ = (iv[b_pos++] ^= *ibuf++); |
| 571 | cnt++; |
| 572 | } |
| 573 | |
| 574 | b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos); |
| 575 | } |
| 576 | |
| 577 | ctx->inf.b[2] = (uint_8t)b_pos; |
| 578 | return EXIT_SUCCESS; |
| 579 | } |
| 580 | |
| 581 | AES_RETURN aes_cfb_decrypt(const unsigned char *ibuf, unsigned char *obuf, |
| 582 | int len, unsigned char *iv, aes_encrypt_ctx ctx[1]) |
| 583 | { int cnt = 0, b_pos = (int)ctx->inf.b[2], nb; |
| 584 | |
| 585 | if(b_pos) /* complete any partial block */ |
| 586 | { uint_8t t; |
| 587 | |
| 588 | while(b_pos < AES_BLOCK_SIZE && cnt < len) |
| 589 | { |
| 590 | t = *ibuf++; |
| 591 | *obuf++ = t ^ iv[b_pos]; |
| 592 | iv[b_pos++] = t; |
| 593 | cnt++; |
| 594 | } |
| 595 | |
| 596 | b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos); |
| 597 | } |
| 598 | |
| 599 | if((nb = (len - cnt) >> 4) != 0) /* process whole blocks */ |
| 600 | { |
| 601 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 602 | |
| 603 | if(ctx->inf.b[1] == 0xff) |
| 604 | { int m; |
| 605 | uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv; |
| 606 | aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16); |
| 607 | via_cwd(cwd, hybrid, dec, 2 * ctx->inf.b[0] - 192); |
| 608 | |
| 609 | if(ALIGN_OFFSET( ctx, 16 )) |
| 610 | return EXIT_FAILURE; |
| 611 | |
| 612 | if(ALIGN_OFFSET( iv, 16 )) /* ensure an aligned iv */ |
| 613 | { |
| 614 | ivp = liv; |
| 615 | memcpy(liv, iv, AES_BLOCK_SIZE); |
| 616 | } |
| 617 | |
| 618 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 )) |
| 619 | { |
| 620 | via_cfb_op6(ksp, cwd, ibuf, obuf, nb, ivp); |
| 621 | ibuf += nb * AES_BLOCK_SIZE; |
| 622 | obuf += nb * AES_BLOCK_SIZE; |
| 623 | cnt += nb * AES_BLOCK_SIZE; |
| 624 | } |
| 625 | else /* input, output or both are unaligned */ |
| 626 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 627 | uint_8t *ip, *op; |
| 628 | |
| 629 | while(nb) |
| 630 | { |
| 631 | m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb), nb -= m; |
| 632 | |
| 633 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 634 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 635 | |
| 636 | if(ip != ibuf) /* input buffer is not aligned */ |
| 637 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 638 | |
| 639 | via_cfb_op6(ksp, cwd, ip, op, m, ivp); |
| 640 | |
| 641 | if(op != obuf) /* output buffer is not aligned */ |
| 642 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 643 | |
| 644 | ibuf += m * AES_BLOCK_SIZE; |
| 645 | obuf += m * AES_BLOCK_SIZE; |
| 646 | cnt += m * AES_BLOCK_SIZE; |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | if(ivp != iv) |
| 651 | memcpy(iv, ivp, AES_BLOCK_SIZE); |
| 652 | } |
| 653 | #else |
| 654 | # ifdef FAST_BUFFER_OPERATIONS |
| 655 | if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) &&!ALIGN_OFFSET( iv, 4 )) |
| 656 | while(cnt + AES_BLOCK_SIZE <= len) |
| 657 | { uint_32t t; |
| 658 | |
| 659 | assert(b_pos == 0); |
| 660 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 661 | return EXIT_FAILURE; |
| 662 | t = lp32(ibuf)[0], lp32(obuf)[0] = t ^ lp32(iv)[0], lp32(iv)[0] = t; |
| 663 | t = lp32(ibuf)[1], lp32(obuf)[1] = t ^ lp32(iv)[1], lp32(iv)[1] = t; |
| 664 | t = lp32(ibuf)[2], lp32(obuf)[2] = t ^ lp32(iv)[2], lp32(iv)[2] = t; |
| 665 | t = lp32(ibuf)[3], lp32(obuf)[3] = t ^ lp32(iv)[3], lp32(iv)[3] = t; |
| 666 | ibuf += AES_BLOCK_SIZE; |
| 667 | obuf += AES_BLOCK_SIZE; |
| 668 | cnt += AES_BLOCK_SIZE; |
| 669 | } |
| 670 | else |
| 671 | # endif |
| 672 | while(cnt + AES_BLOCK_SIZE <= len) |
| 673 | { uint_8t t; |
| 674 | |
| 675 | assert(b_pos == 0); |
| 676 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 677 | return EXIT_FAILURE; |
| 678 | t = ibuf[ 0], obuf[ 0] = t ^ iv[ 0], iv[ 0] = t; |
| 679 | t = ibuf[ 1], obuf[ 1] = t ^ iv[ 1], iv[ 1] = t; |
| 680 | t = ibuf[ 2], obuf[ 2] = t ^ iv[ 2], iv[ 2] = t; |
| 681 | t = ibuf[ 3], obuf[ 3] = t ^ iv[ 3], iv[ 3] = t; |
| 682 | t = ibuf[ 4], obuf[ 4] = t ^ iv[ 4], iv[ 4] = t; |
| 683 | t = ibuf[ 5], obuf[ 5] = t ^ iv[ 5], iv[ 5] = t; |
| 684 | t = ibuf[ 6], obuf[ 6] = t ^ iv[ 6], iv[ 6] = t; |
| 685 | t = ibuf[ 7], obuf[ 7] = t ^ iv[ 7], iv[ 7] = t; |
| 686 | t = ibuf[ 8], obuf[ 8] = t ^ iv[ 8], iv[ 8] = t; |
| 687 | t = ibuf[ 9], obuf[ 9] = t ^ iv[ 9], iv[ 9] = t; |
| 688 | t = ibuf[10], obuf[10] = t ^ iv[10], iv[10] = t; |
| 689 | t = ibuf[11], obuf[11] = t ^ iv[11], iv[11] = t; |
| 690 | t = ibuf[12], obuf[12] = t ^ iv[12], iv[12] = t; |
| 691 | t = ibuf[13], obuf[13] = t ^ iv[13], iv[13] = t; |
| 692 | t = ibuf[14], obuf[14] = t ^ iv[14], iv[14] = t; |
| 693 | t = ibuf[15], obuf[15] = t ^ iv[15], iv[15] = t; |
| 694 | ibuf += AES_BLOCK_SIZE; |
| 695 | obuf += AES_BLOCK_SIZE; |
| 696 | cnt += AES_BLOCK_SIZE; |
| 697 | } |
| 698 | #endif |
| 699 | } |
| 700 | |
| 701 | while(cnt < len) |
| 702 | { uint_8t t; |
| 703 | |
| 704 | if(!b_pos && aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 705 | return EXIT_FAILURE; |
| 706 | |
| 707 | while(cnt < len && b_pos < AES_BLOCK_SIZE) |
| 708 | { |
| 709 | t = *ibuf++; |
| 710 | *obuf++ = t ^ iv[b_pos]; |
| 711 | iv[b_pos++] = t; |
| 712 | cnt++; |
| 713 | } |
| 714 | |
| 715 | b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos); |
| 716 | } |
| 717 | |
| 718 | ctx->inf.b[2] = (uint_8t)b_pos; |
| 719 | return EXIT_SUCCESS; |
| 720 | } |
| 721 | |
| 722 | AES_RETURN aes_ofb_crypt(const unsigned char *ibuf, unsigned char *obuf, |
| 723 | int len, unsigned char *iv, aes_encrypt_ctx ctx[1]) |
| 724 | { int cnt = 0, b_pos = (int)ctx->inf.b[2], nb; |
| 725 | |
| 726 | if(b_pos) /* complete any partial block */ |
| 727 | { |
| 728 | while(b_pos < AES_BLOCK_SIZE && cnt < len) |
| 729 | { |
| 730 | *obuf++ = iv[b_pos++] ^ *ibuf++; |
| 731 | cnt++; |
| 732 | } |
| 733 | |
| 734 | b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos); |
| 735 | } |
| 736 | |
| 737 | if((nb = (len - cnt) >> 4) != 0) /* process whole blocks */ |
| 738 | { |
| 739 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 740 | |
| 741 | if(ctx->inf.b[1] == 0xff) |
| 742 | { int m; |
| 743 | uint_8t *ksp = (uint_8t*)(ctx->ks), *ivp = iv; |
| 744 | aligned_auto(uint_8t, liv, AES_BLOCK_SIZE, 16); |
| 745 | via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192); |
| 746 | |
| 747 | if(ALIGN_OFFSET( ctx, 16 )) |
| 748 | return EXIT_FAILURE; |
| 749 | |
| 750 | if(ALIGN_OFFSET( iv, 16 )) /* ensure an aligned iv */ |
| 751 | { |
| 752 | ivp = liv; |
| 753 | memcpy(liv, iv, AES_BLOCK_SIZE); |
| 754 | } |
| 755 | |
| 756 | if(!ALIGN_OFFSET( ibuf, 16 ) && !ALIGN_OFFSET( obuf, 16 )) |
| 757 | { |
| 758 | via_ofb_op6(ksp, cwd, ibuf, obuf, nb, ivp); |
| 759 | ibuf += nb * AES_BLOCK_SIZE; |
| 760 | obuf += nb * AES_BLOCK_SIZE; |
| 761 | cnt += nb * AES_BLOCK_SIZE; |
| 762 | } |
| 763 | else /* input, output or both are unaligned */ |
| 764 | { aligned_auto(uint_8t, buf, BFR_BLOCKS * AES_BLOCK_SIZE, 16); |
| 765 | uint_8t *ip, *op; |
| 766 | |
| 767 | while(nb) |
| 768 | { |
| 769 | m = (nb > BFR_BLOCKS ? BFR_BLOCKS : nb), nb -= m; |
| 770 | |
| 771 | ip = (ALIGN_OFFSET( ibuf, 16 ) ? buf : ibuf); |
| 772 | op = (ALIGN_OFFSET( obuf, 16 ) ? buf : obuf); |
| 773 | |
| 774 | if(ip != ibuf) |
| 775 | memcpy(buf, ibuf, m * AES_BLOCK_SIZE); |
| 776 | |
| 777 | via_ofb_op6(ksp, cwd, ip, op, m, ivp); |
| 778 | |
| 779 | if(op != obuf) |
| 780 | memcpy(obuf, buf, m * AES_BLOCK_SIZE); |
| 781 | |
| 782 | ibuf += m * AES_BLOCK_SIZE; |
| 783 | obuf += m * AES_BLOCK_SIZE; |
| 784 | cnt += m * AES_BLOCK_SIZE; |
| 785 | } |
| 786 | } |
| 787 | |
| 788 | if(ivp != iv) |
| 789 | memcpy(iv, ivp, AES_BLOCK_SIZE); |
| 790 | } |
| 791 | #else |
| 792 | # ifdef FAST_BUFFER_OPERATIONS |
| 793 | if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( iv, 4 )) |
| 794 | while(cnt + AES_BLOCK_SIZE <= len) |
| 795 | { |
| 796 | assert(b_pos == 0); |
| 797 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 798 | return EXIT_FAILURE; |
| 799 | lp32(obuf)[0] = lp32(iv)[0] ^ lp32(ibuf)[0]; |
| 800 | lp32(obuf)[1] = lp32(iv)[1] ^ lp32(ibuf)[1]; |
| 801 | lp32(obuf)[2] = lp32(iv)[2] ^ lp32(ibuf)[2]; |
| 802 | lp32(obuf)[3] = lp32(iv)[3] ^ lp32(ibuf)[3]; |
| 803 | ibuf += AES_BLOCK_SIZE; |
| 804 | obuf += AES_BLOCK_SIZE; |
| 805 | cnt += AES_BLOCK_SIZE; |
| 806 | } |
| 807 | else |
| 808 | # endif |
| 809 | while(cnt + AES_BLOCK_SIZE <= len) |
| 810 | { |
| 811 | assert(b_pos == 0); |
| 812 | if(aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 813 | return EXIT_FAILURE; |
| 814 | obuf[ 0] = iv[ 0] ^ ibuf[ 0]; obuf[ 1] = iv[ 1] ^ ibuf[ 1]; |
| 815 | obuf[ 2] = iv[ 2] ^ ibuf[ 2]; obuf[ 3] = iv[ 3] ^ ibuf[ 3]; |
| 816 | obuf[ 4] = iv[ 4] ^ ibuf[ 4]; obuf[ 5] = iv[ 5] ^ ibuf[ 5]; |
| 817 | obuf[ 6] = iv[ 6] ^ ibuf[ 6]; obuf[ 7] = iv[ 7] ^ ibuf[ 7]; |
| 818 | obuf[ 8] = iv[ 8] ^ ibuf[ 8]; obuf[ 9] = iv[ 9] ^ ibuf[ 9]; |
| 819 | obuf[10] = iv[10] ^ ibuf[10]; obuf[11] = iv[11] ^ ibuf[11]; |
| 820 | obuf[12] = iv[12] ^ ibuf[12]; obuf[13] = iv[13] ^ ibuf[13]; |
| 821 | obuf[14] = iv[14] ^ ibuf[14]; obuf[15] = iv[15] ^ ibuf[15]; |
| 822 | ibuf += AES_BLOCK_SIZE; |
| 823 | obuf += AES_BLOCK_SIZE; |
| 824 | cnt += AES_BLOCK_SIZE; |
| 825 | } |
| 826 | #endif |
| 827 | } |
| 828 | |
| 829 | while(cnt < len) |
| 830 | { |
| 831 | if(!b_pos && aes_encrypt(iv, iv, ctx) != EXIT_SUCCESS) |
| 832 | return EXIT_FAILURE; |
| 833 | |
| 834 | while(cnt < len && b_pos < AES_BLOCK_SIZE) |
| 835 | { |
| 836 | *obuf++ = iv[b_pos++] ^ *ibuf++; |
| 837 | cnt++; |
| 838 | } |
| 839 | |
| 840 | b_pos = (b_pos == AES_BLOCK_SIZE ? 0 : b_pos); |
| 841 | } |
| 842 | |
| 843 | ctx->inf.b[2] = (uint_8t)b_pos; |
| 844 | return EXIT_SUCCESS; |
| 845 | } |
| 846 | |
| 847 | #define BFR_LENGTH (BFR_BLOCKS * AES_BLOCK_SIZE) |
| 848 | |
| 849 | AES_RETURN aes_ctr_crypt(const unsigned char *ibuf, unsigned char *obuf, |
| 850 | int len, unsigned char *cbuf, cbuf_inc ctr_inc, aes_encrypt_ctx ctx[1]) |
| 851 | { unsigned char *ip; |
| 852 | int i, blen, b_pos = (int)(ctx->inf.b[2]); |
| 853 | |
| 854 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 855 | aligned_auto(uint_8t, buf, BFR_LENGTH, 16); |
| 856 | if(ctx->inf.b[1] == 0xff && ALIGN_OFFSET( ctx, 16 )) |
| 857 | return EXIT_FAILURE; |
| 858 | #else |
| 859 | uint_8t buf[BFR_LENGTH]; |
| 860 | #endif |
| 861 | |
| 862 | if(b_pos) |
| 863 | { |
| 864 | memcpy(buf, cbuf, AES_BLOCK_SIZE); |
| 865 | if(aes_ecb_encrypt(buf, buf, AES_BLOCK_SIZE, ctx) != EXIT_SUCCESS) |
| 866 | return EXIT_FAILURE; |
| 867 | |
| 868 | while(b_pos < AES_BLOCK_SIZE && len) |
| 869 | { |
| 870 | *obuf++ = *ibuf++ ^ buf[b_pos++]; |
| 871 | --len; |
| 872 | } |
| 873 | |
| 874 | if(len) |
| 875 | ctr_inc(cbuf), b_pos = 0; |
| 876 | } |
| 877 | |
| 878 | while(len) |
| 879 | { |
| 880 | blen = (len > BFR_LENGTH ? BFR_LENGTH : len), len -= blen; |
| 881 | |
| 882 | for(i = 0, ip = buf; i < (blen >> 4); ++i) |
| 883 | { |
| 884 | memcpy(ip, cbuf, AES_BLOCK_SIZE); |
| 885 | ctr_inc(cbuf); |
| 886 | ip += AES_BLOCK_SIZE; |
| 887 | } |
| 888 | |
| 889 | if(blen & (AES_BLOCK_SIZE - 1)) |
| 890 | memcpy(ip, cbuf, AES_BLOCK_SIZE), i++; |
| 891 | |
| 892 | #if defined( USE_VIA_ACE_IF_PRESENT ) |
| 893 | if(ctx->inf.b[1] == 0xff) |
| 894 | { |
| 895 | via_cwd(cwd, hybrid, enc, 2 * ctx->inf.b[0] - 192); |
| 896 | via_ecb_op5((ctx->ks), cwd, buf, buf, i); |
| 897 | } |
| 898 | else |
| 899 | #endif |
| 900 | if(aes_ecb_encrypt(buf, buf, i * AES_BLOCK_SIZE, ctx) != EXIT_SUCCESS) |
| 901 | return EXIT_FAILURE; |
| 902 | |
| 903 | i = 0; ip = buf; |
| 904 | # ifdef FAST_BUFFER_OPERATIONS |
| 905 | if(!ALIGN_OFFSET( ibuf, 4 ) && !ALIGN_OFFSET( obuf, 4 ) && !ALIGN_OFFSET( ip, 4 )) |
| 906 | while(i + AES_BLOCK_SIZE <= blen) |
| 907 | { |
| 908 | lp32(obuf)[0] = lp32(ibuf)[0] ^ lp32(ip)[0]; |
| 909 | lp32(obuf)[1] = lp32(ibuf)[1] ^ lp32(ip)[1]; |
| 910 | lp32(obuf)[2] = lp32(ibuf)[2] ^ lp32(ip)[2]; |
| 911 | lp32(obuf)[3] = lp32(ibuf)[3] ^ lp32(ip)[3]; |
| 912 | i += AES_BLOCK_SIZE; |
| 913 | ip += AES_BLOCK_SIZE; |
| 914 | ibuf += AES_BLOCK_SIZE; |
| 915 | obuf += AES_BLOCK_SIZE; |
| 916 | } |
| 917 | else |
| 918 | #endif |
| 919 | while(i + AES_BLOCK_SIZE <= blen) |
| 920 | { |
| 921 | obuf[ 0] = ibuf[ 0] ^ ip[ 0]; obuf[ 1] = ibuf[ 1] ^ ip[ 1]; |
| 922 | obuf[ 2] = ibuf[ 2] ^ ip[ 2]; obuf[ 3] = ibuf[ 3] ^ ip[ 3]; |
| 923 | obuf[ 4] = ibuf[ 4] ^ ip[ 4]; obuf[ 5] = ibuf[ 5] ^ ip[ 5]; |
| 924 | obuf[ 6] = ibuf[ 6] ^ ip[ 6]; obuf[ 7] = ibuf[ 7] ^ ip[ 7]; |
| 925 | obuf[ 8] = ibuf[ 8] ^ ip[ 8]; obuf[ 9] = ibuf[ 9] ^ ip[ 9]; |
| 926 | obuf[10] = ibuf[10] ^ ip[10]; obuf[11] = ibuf[11] ^ ip[11]; |
| 927 | obuf[12] = ibuf[12] ^ ip[12]; obuf[13] = ibuf[13] ^ ip[13]; |
| 928 | obuf[14] = ibuf[14] ^ ip[14]; obuf[15] = ibuf[15] ^ ip[15]; |
| 929 | i += AES_BLOCK_SIZE; |
| 930 | ip += AES_BLOCK_SIZE; |
| 931 | ibuf += AES_BLOCK_SIZE; |
| 932 | obuf += AES_BLOCK_SIZE; |
| 933 | } |
| 934 | |
| 935 | while(i++ < blen) |
| 936 | *obuf++ = *ibuf++ ^ ip[b_pos++]; |
| 937 | } |
| 938 | |
| 939 | ctx->inf.b[2] = (uint_8t)b_pos; |
| 940 | return EXIT_SUCCESS; |
| 941 | } |
| 942 | |
| 943 | #if defined(__cplusplus) |
| 944 | } |
| 945 | #endif |
| 946 | #endif |