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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 | /* * Glue Code for AVX assembler version of Twofish Cipher * * Copyright (C) 2012 Johannes Goetzfried * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> * * Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA * */ #include <linux/module.h> #include <linux/hardirq.h> #include <linux/types.h> #include <linux/crypto.h> #include <linux/err.h> #include <crypto/ablk_helper.h> #include <crypto/algapi.h> #include <crypto/twofish.h> #include <crypto/cryptd.h> #include <crypto/b128ops.h> #include <crypto/ctr.h> #include <crypto/lrw.h> #include <crypto/xts.h> #include <asm/fpu/api.h> #include <asm/crypto/twofish.h> #include <asm/crypto/glue_helper.h> #include <crypto/scatterwalk.h> #include <linux/workqueue.h> #include <linux/spinlock.h> #define TWOFISH_PARALLEL_BLOCKS 8 /* 8-way parallel cipher functions */ asmlinkage void twofish_ecb_enc_8way(struct twofish_ctx *ctx, u8 *dst, const u8 *src); asmlinkage void twofish_ecb_dec_8way(struct twofish_ctx *ctx, u8 *dst, const u8 *src); asmlinkage void twofish_cbc_dec_8way(struct twofish_ctx *ctx, u8 *dst, const u8 *src); asmlinkage void twofish_ctr_8way(struct twofish_ctx *ctx, u8 *dst, const u8 *src, le128 *iv); asmlinkage void twofish_xts_enc_8way(struct twofish_ctx *ctx, u8 *dst, const u8 *src, le128 *iv); asmlinkage void twofish_xts_dec_8way(struct twofish_ctx *ctx, u8 *dst, const u8 *src, le128 *iv); static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst, const u8 *src) { __twofish_enc_blk_3way(ctx, dst, src, false); } static void twofish_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv) { glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(twofish_enc_blk)); } static void twofish_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv) { glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(twofish_dec_blk)); } static const struct common_glue_ctx twofish_enc = { .num_funcs = 3, .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, .funcs = { { .num_blocks = TWOFISH_PARALLEL_BLOCKS, .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_ecb_enc_8way) } }, { .num_blocks = 3, .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) } }, { .num_blocks = 1, .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) } } } }; static const struct common_glue_ctx twofish_ctr = { .num_funcs = 3, .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, .funcs = { { .num_blocks = TWOFISH_PARALLEL_BLOCKS, .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_ctr_8way) } }, { .num_blocks = 3, .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr_3way) } }, { .num_blocks = 1, .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(twofish_enc_blk_ctr) } } } }; static const struct common_glue_ctx twofish_enc_xts = { .num_funcs = 2, .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, .funcs = { { .num_blocks = TWOFISH_PARALLEL_BLOCKS, .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_enc_8way) } }, { .num_blocks = 1, .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_enc) } } } }; static const struct common_glue_ctx twofish_dec = { .num_funcs = 3, .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, .funcs = { { .num_blocks = TWOFISH_PARALLEL_BLOCKS, .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_ecb_dec_8way) } }, { .num_blocks = 3, .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) } }, { .num_blocks = 1, .fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) } } } }; static const struct common_glue_ctx twofish_dec_cbc = { .num_funcs = 3, .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, .funcs = { { .num_blocks = TWOFISH_PARALLEL_BLOCKS, .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_cbc_dec_8way) } }, { .num_blocks = 3, .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) } }, { .num_blocks = 1, .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) } } } }; static const struct common_glue_ctx twofish_dec_xts = { .num_funcs = 2, .fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS, .funcs = { { .num_blocks = TWOFISH_PARALLEL_BLOCKS, .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_dec_8way) } }, { .num_blocks = 1, .fn_u = { .xts = GLUE_XTS_FUNC_CAST(twofish_xts_dec) } } } }; static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_ecb_crypt_128bit(&twofish_enc, desc, dst, src, nbytes); } static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_ecb_crypt_128bit(&twofish_dec, desc, dst, src, nbytes); } static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(twofish_enc_blk), desc, dst, src, nbytes); } static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_cbc_decrypt_128bit(&twofish_dec_cbc, desc, dst, src, nbytes); } static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { return glue_ctr_crypt_128bit(&twofish_ctr, desc, dst, src, nbytes); } static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes) { return glue_fpu_begin(TF_BLOCK_SIZE, TWOFISH_PARALLEL_BLOCKS, NULL, fpu_enabled, nbytes); } static inline void twofish_fpu_end(bool fpu_enabled) { glue_fpu_end(fpu_enabled); } struct crypt_priv { struct twofish_ctx *ctx; bool fpu_enabled; }; static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) { const unsigned int bsize = TF_BLOCK_SIZE; struct crypt_priv *ctx = priv; int i; ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes); if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) { twofish_ecb_enc_8way(ctx->ctx, srcdst, srcdst); return; } for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3) twofish_enc_blk_3way(ctx->ctx, srcdst, srcdst); nbytes %= bsize * 3; for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) twofish_enc_blk(ctx->ctx, srcdst, srcdst); } static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) { const unsigned int bsize = TF_BLOCK_SIZE; struct crypt_priv *ctx = priv; int i; ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes); if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) { twofish_ecb_dec_8way(ctx->ctx, srcdst, srcdst); return; } for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3) twofish_dec_blk_3way(ctx->ctx, srcdst, srcdst); nbytes %= bsize * 3; for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) twofish_dec_blk(ctx->ctx, srcdst, srcdst); } static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); be128 buf[TWOFISH_PARALLEL_BLOCKS]; struct crypt_priv crypt_ctx = { .ctx = &ctx->twofish_ctx, .fpu_enabled = false, }; struct lrw_crypt_req req = { .tbuf = buf, .tbuflen = sizeof(buf), .table_ctx = &ctx->lrw_table, .crypt_ctx = &crypt_ctx, .crypt_fn = encrypt_callback, }; int ret; desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; ret = lrw_crypt(desc, dst, src, nbytes, &req); twofish_fpu_end(crypt_ctx.fpu_enabled); return ret; } static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); be128 buf[TWOFISH_PARALLEL_BLOCKS]; struct crypt_priv crypt_ctx = { .ctx = &ctx->twofish_ctx, .fpu_enabled = false, }; struct lrw_crypt_req req = { .tbuf = buf, .tbuflen = sizeof(buf), .table_ctx = &ctx->lrw_table, .crypt_ctx = &crypt_ctx, .crypt_fn = decrypt_callback, }; int ret; desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; ret = lrw_crypt(desc, dst, src, nbytes, &req); twofish_fpu_end(crypt_ctx.fpu_enabled); return ret; } static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); return glue_xts_crypt_128bit(&twofish_enc_xts, desc, dst, src, nbytes, XTS_TWEAK_CAST(twofish_enc_blk), &ctx->tweak_ctx, &ctx->crypt_ctx); } static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); return glue_xts_crypt_128bit(&twofish_dec_xts, desc, dst, src, nbytes, XTS_TWEAK_CAST(twofish_enc_blk), &ctx->tweak_ctx, &ctx->crypt_ctx); } static struct crypto_alg twofish_algs[10] = { { .cra_name = "__ecb-twofish-avx", .cra_driver_name = "__driver-ecb-twofish-avx", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_INTERNAL, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct twofish_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = TF_MIN_KEY_SIZE, .max_keysize = TF_MAX_KEY_SIZE, .setkey = twofish_setkey, .encrypt = ecb_encrypt, .decrypt = ecb_decrypt, }, }, }, { .cra_name = "__cbc-twofish-avx", .cra_driver_name = "__driver-cbc-twofish-avx", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_INTERNAL, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct twofish_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = TF_MIN_KEY_SIZE, .max_keysize = TF_MAX_KEY_SIZE, .setkey = twofish_setkey, .encrypt = cbc_encrypt, .decrypt = cbc_decrypt, }, }, }, { .cra_name = "__ctr-twofish-avx", .cra_driver_name = "__driver-ctr-twofish-avx", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_INTERNAL, .cra_blocksize = 1, .cra_ctxsize = sizeof(struct twofish_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = TF_MIN_KEY_SIZE, .max_keysize = TF_MAX_KEY_SIZE, .ivsize = TF_BLOCK_SIZE, .setkey = twofish_setkey, .encrypt = ctr_crypt, .decrypt = ctr_crypt, }, }, }, { .cra_name = "__lrw-twofish-avx", .cra_driver_name = "__driver-lrw-twofish-avx", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_INTERNAL, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct twofish_lrw_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_exit = lrw_twofish_exit_tfm, .cra_u = { .blkcipher = { .min_keysize = TF_MIN_KEY_SIZE + TF_BLOCK_SIZE, .max_keysize = TF_MAX_KEY_SIZE + TF_BLOCK_SIZE, .ivsize = TF_BLOCK_SIZE, .setkey = lrw_twofish_setkey, .encrypt = lrw_encrypt, .decrypt = lrw_decrypt, }, }, }, { .cra_name = "__xts-twofish-avx", .cra_driver_name = "__driver-xts-twofish-avx", .cra_priority = 0, .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_INTERNAL, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct twofish_xts_ctx), .cra_alignmask = 0, .cra_type = &crypto_blkcipher_type, .cra_module = THIS_MODULE, .cra_u = { .blkcipher = { .min_keysize = TF_MIN_KEY_SIZE * 2, .max_keysize = TF_MAX_KEY_SIZE * 2, .ivsize = TF_BLOCK_SIZE, .setkey = xts_twofish_setkey, .encrypt = xts_encrypt, .decrypt = xts_decrypt, }, }, }, { .cra_name = "ecb(twofish)", .cra_driver_name = "ecb-twofish-avx", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = TF_MIN_KEY_SIZE, .max_keysize = TF_MAX_KEY_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_decrypt, }, }, }, { .cra_name = "cbc(twofish)", .cra_driver_name = "cbc-twofish-avx", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = TF_MIN_KEY_SIZE, .max_keysize = TF_MAX_KEY_SIZE, .ivsize = TF_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = __ablk_encrypt, .decrypt = ablk_decrypt, }, }, }, { .cra_name = "ctr(twofish)", .cra_driver_name = "ctr-twofish-avx", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = 1, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = TF_MIN_KEY_SIZE, .max_keysize = TF_MAX_KEY_SIZE, .ivsize = TF_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_encrypt, .geniv = "chainiv", }, }, }, { .cra_name = "lrw(twofish)", .cra_driver_name = "lrw-twofish-avx", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = TF_MIN_KEY_SIZE + TF_BLOCK_SIZE, .max_keysize = TF_MAX_KEY_SIZE + TF_BLOCK_SIZE, .ivsize = TF_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_decrypt, }, }, }, { .cra_name = "xts(twofish)", .cra_driver_name = "xts-twofish-avx", .cra_priority = 400, .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, .cra_blocksize = TF_BLOCK_SIZE, .cra_ctxsize = sizeof(struct async_helper_ctx), .cra_alignmask = 0, .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, .cra_init = ablk_init, .cra_exit = ablk_exit, .cra_u = { .ablkcipher = { .min_keysize = TF_MIN_KEY_SIZE * 2, .max_keysize = TF_MAX_KEY_SIZE * 2, .ivsize = TF_BLOCK_SIZE, .setkey = ablk_set_key, .encrypt = ablk_encrypt, .decrypt = ablk_decrypt, }, }, } }; static int __init twofish_init(void) { const char *feature_name; if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, &feature_name)) { pr_info("CPU feature '%s' is not supported.\n", feature_name); return -ENODEV; } return crypto_register_algs(twofish_algs, ARRAY_SIZE(twofish_algs)); } static void __exit twofish_exit(void) { crypto_unregister_algs(twofish_algs, ARRAY_SIZE(twofish_algs)); } module_init(twofish_init); module_exit(twofish_exit); MODULE_DESCRIPTION("Twofish Cipher Algorithm, AVX optimized"); MODULE_LICENSE("GPL"); MODULE_ALIAS_CRYPTO("twofish"); |