| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* |
| 3 | * Software async crypto daemon. |
| 4 | * |
| 5 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| 6 | * |
| 7 | * Added AEAD support to cryptd. |
| 8 | * Authors: Tadeusz Struk (tadeusz.struk@intel.com) |
| 9 | * Adrian Hoban <adrian.hoban@intel.com> |
| 10 | * Gabriele Paoloni <gabriele.paoloni@intel.com> |
| 11 | * Aidan O'Mahony (aidan.o.mahony@intel.com) |
| 12 | * Copyright (c) 2010, Intel Corporation. |
| 13 | */ |
| 14 | |
| 15 | #include <crypto/internal/hash.h> |
| 16 | #include <crypto/internal/aead.h> |
| 17 | #include <crypto/internal/skcipher.h> |
| 18 | #include <crypto/cryptd.h> |
| 19 | #include <linux/refcount.h> |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/list.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/scatterlist.h> |
| 26 | #include <linux/sched.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/workqueue.h> |
| 29 | |
| 30 | static unsigned int cryptd_max_cpu_qlen = 1000; |
| 31 | module_param(cryptd_max_cpu_qlen, uint, 0); |
| 32 | MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth"); |
| 33 | |
| 34 | static struct workqueue_struct *cryptd_wq; |
| 35 | |
| 36 | struct cryptd_cpu_queue { |
| 37 | struct crypto_queue queue; |
| 38 | struct work_struct work; |
| 39 | }; |
| 40 | |
| 41 | struct cryptd_queue { |
| 42 | /* |
| 43 | * Protected by disabling BH to allow enqueueing from softinterrupt and |
| 44 | * dequeuing from kworker (cryptd_queue_worker()). |
| 45 | */ |
| 46 | struct cryptd_cpu_queue __percpu *cpu_queue; |
| 47 | }; |
| 48 | |
| 49 | struct cryptd_instance_ctx { |
| 50 | struct crypto_spawn spawn; |
| 51 | struct cryptd_queue *queue; |
| 52 | }; |
| 53 | |
| 54 | struct skcipherd_instance_ctx { |
| 55 | struct crypto_skcipher_spawn spawn; |
| 56 | struct cryptd_queue *queue; |
| 57 | }; |
| 58 | |
| 59 | struct hashd_instance_ctx { |
| 60 | struct crypto_shash_spawn spawn; |
| 61 | struct cryptd_queue *queue; |
| 62 | }; |
| 63 | |
| 64 | struct aead_instance_ctx { |
| 65 | struct crypto_aead_spawn aead_spawn; |
| 66 | struct cryptd_queue *queue; |
| 67 | }; |
| 68 | |
| 69 | struct cryptd_skcipher_ctx { |
| 70 | refcount_t refcnt; |
| 71 | struct crypto_skcipher *child; |
| 72 | }; |
| 73 | |
| 74 | struct cryptd_skcipher_request_ctx { |
| 75 | struct skcipher_request req; |
| 76 | }; |
| 77 | |
| 78 | struct cryptd_hash_ctx { |
| 79 | refcount_t refcnt; |
| 80 | struct crypto_shash *child; |
| 81 | }; |
| 82 | |
| 83 | struct cryptd_hash_request_ctx { |
| 84 | crypto_completion_t complete; |
| 85 | void *data; |
| 86 | struct shash_desc desc; |
| 87 | }; |
| 88 | |
| 89 | struct cryptd_aead_ctx { |
| 90 | refcount_t refcnt; |
| 91 | struct crypto_aead *child; |
| 92 | }; |
| 93 | |
| 94 | struct cryptd_aead_request_ctx { |
| 95 | struct aead_request req; |
| 96 | }; |
| 97 | |
| 98 | static void cryptd_queue_worker(struct work_struct *work); |
| 99 | |
| 100 | static int cryptd_init_queue(struct cryptd_queue *queue, |
| 101 | unsigned int max_cpu_qlen) |
| 102 | { |
| 103 | int cpu; |
| 104 | struct cryptd_cpu_queue *cpu_queue; |
| 105 | |
| 106 | queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); |
| 107 | if (!queue->cpu_queue) |
| 108 | return -ENOMEM; |
| 109 | for_each_possible_cpu(cpu) { |
| 110 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 111 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); |
| 112 | INIT_WORK(&cpu_queue->work, cryptd_queue_worker); |
| 113 | } |
| 114 | pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen); |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static void cryptd_fini_queue(struct cryptd_queue *queue) |
| 119 | { |
| 120 | int cpu; |
| 121 | struct cryptd_cpu_queue *cpu_queue; |
| 122 | |
| 123 | for_each_possible_cpu(cpu) { |
| 124 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); |
| 125 | BUG_ON(cpu_queue->queue.qlen); |
| 126 | } |
| 127 | free_percpu(queue->cpu_queue); |
| 128 | } |
| 129 | |
| 130 | static int cryptd_enqueue_request(struct cryptd_queue *queue, |
| 131 | struct crypto_async_request *request) |
| 132 | { |
| 133 | int err; |
| 134 | struct cryptd_cpu_queue *cpu_queue; |
| 135 | refcount_t *refcnt; |
| 136 | |
| 137 | local_bh_disable(); |
| 138 | cpu_queue = this_cpu_ptr(queue->cpu_queue); |
| 139 | err = crypto_enqueue_request(&cpu_queue->queue, request); |
| 140 | |
| 141 | refcnt = crypto_tfm_ctx(request->tfm); |
| 142 | |
| 143 | if (err == -ENOSPC) |
| 144 | goto out; |
| 145 | |
| 146 | queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work); |
| 147 | |
| 148 | if (!refcount_read(refcnt)) |
| 149 | goto out; |
| 150 | |
| 151 | refcount_inc(refcnt); |
| 152 | |
| 153 | out: |
| 154 | local_bh_enable(); |
| 155 | |
| 156 | return err; |
| 157 | } |
| 158 | |
| 159 | /* Called in workqueue context, do one real cryption work (via |
| 160 | * req->complete) and reschedule itself if there are more work to |
| 161 | * do. */ |
| 162 | static void cryptd_queue_worker(struct work_struct *work) |
| 163 | { |
| 164 | struct cryptd_cpu_queue *cpu_queue; |
| 165 | struct crypto_async_request *req, *backlog; |
| 166 | |
| 167 | cpu_queue = container_of(work, struct cryptd_cpu_queue, work); |
| 168 | /* |
| 169 | * Only handle one request at a time to avoid hogging crypto workqueue. |
| 170 | */ |
| 171 | local_bh_disable(); |
| 172 | backlog = crypto_get_backlog(&cpu_queue->queue); |
| 173 | req = crypto_dequeue_request(&cpu_queue->queue); |
| 174 | local_bh_enable(); |
| 175 | |
| 176 | if (!req) |
| 177 | return; |
| 178 | |
| 179 | if (backlog) |
| 180 | crypto_request_complete(backlog, -EINPROGRESS); |
| 181 | crypto_request_complete(req, 0); |
| 182 | |
| 183 | if (cpu_queue->queue.qlen) |
| 184 | queue_work(cryptd_wq, &cpu_queue->work); |
| 185 | } |
| 186 | |
| 187 | static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) |
| 188 | { |
| 189 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
| 190 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); |
| 191 | return ictx->queue; |
| 192 | } |
| 193 | |
| 194 | static void cryptd_type_and_mask(struct crypto_attr_type *algt, |
| 195 | u32 *type, u32 *mask) |
| 196 | { |
| 197 | /* |
| 198 | * cryptd is allowed to wrap internal algorithms, but in that case the |
| 199 | * resulting cryptd instance will be marked as internal as well. |
| 200 | */ |
| 201 | *type = algt->type & CRYPTO_ALG_INTERNAL; |
| 202 | *mask = algt->mask & CRYPTO_ALG_INTERNAL; |
| 203 | |
| 204 | /* No point in cryptd wrapping an algorithm that's already async. */ |
| 205 | *mask |= CRYPTO_ALG_ASYNC; |
| 206 | |
| 207 | *mask |= crypto_algt_inherited_mask(algt); |
| 208 | } |
| 209 | |
| 210 | static int cryptd_init_instance(struct crypto_instance *inst, |
| 211 | struct crypto_alg *alg) |
| 212 | { |
| 213 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 214 | "cryptd(%s)", |
| 215 | alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
| 216 | return -ENAMETOOLONG; |
| 217 | |
| 218 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); |
| 219 | |
| 220 | inst->alg.cra_priority = alg->cra_priority + 50; |
| 221 | inst->alg.cra_blocksize = alg->cra_blocksize; |
| 222 | inst->alg.cra_alignmask = alg->cra_alignmask; |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | static int cryptd_skcipher_setkey(struct crypto_skcipher *parent, |
| 228 | const u8 *key, unsigned int keylen) |
| 229 | { |
| 230 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent); |
| 231 | struct crypto_skcipher *child = ctx->child; |
| 232 | |
| 233 | crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 234 | crypto_skcipher_set_flags(child, |
| 235 | crypto_skcipher_get_flags(parent) & |
| 236 | CRYPTO_TFM_REQ_MASK); |
| 237 | return crypto_skcipher_setkey(child, key, keylen); |
| 238 | } |
| 239 | |
| 240 | static struct skcipher_request *cryptd_skcipher_prepare( |
| 241 | struct skcipher_request *req, int err) |
| 242 | { |
| 243 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); |
| 244 | struct skcipher_request *subreq = &rctx->req; |
| 245 | struct cryptd_skcipher_ctx *ctx; |
| 246 | struct crypto_skcipher *child; |
| 247 | |
| 248 | req->base.complete = subreq->base.complete; |
| 249 | req->base.data = subreq->base.data; |
| 250 | |
| 251 | if (unlikely(err == -EINPROGRESS)) |
| 252 | return NULL; |
| 253 | |
| 254 | ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); |
| 255 | child = ctx->child; |
| 256 | |
| 257 | skcipher_request_set_tfm(subreq, child); |
| 258 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, |
| 259 | NULL, NULL); |
| 260 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, |
| 261 | req->iv); |
| 262 | |
| 263 | return subreq; |
| 264 | } |
| 265 | |
| 266 | static void cryptd_skcipher_complete(struct skcipher_request *req, int err, |
| 267 | crypto_completion_t complete) |
| 268 | { |
| 269 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); |
| 270 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| 271 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
| 272 | struct skcipher_request *subreq = &rctx->req; |
| 273 | int refcnt = refcount_read(&ctx->refcnt); |
| 274 | |
| 275 | local_bh_disable(); |
| 276 | skcipher_request_complete(req, err); |
| 277 | local_bh_enable(); |
| 278 | |
| 279 | if (unlikely(err == -EINPROGRESS)) { |
| 280 | subreq->base.complete = req->base.complete; |
| 281 | subreq->base.data = req->base.data; |
| 282 | req->base.complete = complete; |
| 283 | req->base.data = req; |
| 284 | } else if (refcnt && refcount_dec_and_test(&ctx->refcnt)) |
| 285 | crypto_free_skcipher(tfm); |
| 286 | } |
| 287 | |
| 288 | static void cryptd_skcipher_encrypt(void *data, int err) |
| 289 | { |
| 290 | struct skcipher_request *req = data; |
| 291 | struct skcipher_request *subreq; |
| 292 | |
| 293 | subreq = cryptd_skcipher_prepare(req, err); |
| 294 | if (likely(subreq)) |
| 295 | err = crypto_skcipher_encrypt(subreq); |
| 296 | |
| 297 | cryptd_skcipher_complete(req, err, cryptd_skcipher_encrypt); |
| 298 | } |
| 299 | |
| 300 | static void cryptd_skcipher_decrypt(void *data, int err) |
| 301 | { |
| 302 | struct skcipher_request *req = data; |
| 303 | struct skcipher_request *subreq; |
| 304 | |
| 305 | subreq = cryptd_skcipher_prepare(req, err); |
| 306 | if (likely(subreq)) |
| 307 | err = crypto_skcipher_decrypt(subreq); |
| 308 | |
| 309 | cryptd_skcipher_complete(req, err, cryptd_skcipher_decrypt); |
| 310 | } |
| 311 | |
| 312 | static int cryptd_skcipher_enqueue(struct skcipher_request *req, |
| 313 | crypto_completion_t compl) |
| 314 | { |
| 315 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); |
| 316 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| 317 | struct skcipher_request *subreq = &rctx->req; |
| 318 | struct cryptd_queue *queue; |
| 319 | |
| 320 | queue = cryptd_get_queue(crypto_skcipher_tfm(tfm)); |
| 321 | subreq->base.complete = req->base.complete; |
| 322 | subreq->base.data = req->base.data; |
| 323 | req->base.complete = compl; |
| 324 | req->base.data = req; |
| 325 | |
| 326 | return cryptd_enqueue_request(queue, &req->base); |
| 327 | } |
| 328 | |
| 329 | static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req) |
| 330 | { |
| 331 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt); |
| 332 | } |
| 333 | |
| 334 | static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req) |
| 335 | { |
| 336 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt); |
| 337 | } |
| 338 | |
| 339 | static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm) |
| 340 | { |
| 341 | struct skcipher_instance *inst = skcipher_alg_instance(tfm); |
| 342 | struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst); |
| 343 | struct crypto_skcipher_spawn *spawn = &ictx->spawn; |
| 344 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
| 345 | struct crypto_skcipher *cipher; |
| 346 | |
| 347 | cipher = crypto_spawn_skcipher(spawn); |
| 348 | if (IS_ERR(cipher)) |
| 349 | return PTR_ERR(cipher); |
| 350 | |
| 351 | ctx->child = cipher; |
| 352 | crypto_skcipher_set_reqsize( |
| 353 | tfm, sizeof(struct cryptd_skcipher_request_ctx) + |
| 354 | crypto_skcipher_reqsize(cipher)); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm) |
| 359 | { |
| 360 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); |
| 361 | |
| 362 | crypto_free_skcipher(ctx->child); |
| 363 | } |
| 364 | |
| 365 | static void cryptd_skcipher_free(struct skcipher_instance *inst) |
| 366 | { |
| 367 | struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst); |
| 368 | |
| 369 | crypto_drop_skcipher(&ctx->spawn); |
| 370 | kfree(inst); |
| 371 | } |
| 372 | |
| 373 | static int cryptd_create_skcipher(struct crypto_template *tmpl, |
| 374 | struct rtattr **tb, |
| 375 | struct crypto_attr_type *algt, |
| 376 | struct cryptd_queue *queue) |
| 377 | { |
| 378 | struct skcipherd_instance_ctx *ctx; |
| 379 | struct skcipher_instance *inst; |
| 380 | struct skcipher_alg *alg; |
| 381 | u32 type; |
| 382 | u32 mask; |
| 383 | int err; |
| 384 | |
| 385 | cryptd_type_and_mask(algt, &type, &mask); |
| 386 | |
| 387 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
| 388 | if (!inst) |
| 389 | return -ENOMEM; |
| 390 | |
| 391 | ctx = skcipher_instance_ctx(inst); |
| 392 | ctx->queue = queue; |
| 393 | |
| 394 | err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst), |
| 395 | crypto_attr_alg_name(tb[1]), type, mask); |
| 396 | if (err) |
| 397 | goto err_free_inst; |
| 398 | |
| 399 | alg = crypto_spawn_skcipher_alg(&ctx->spawn); |
| 400 | err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base); |
| 401 | if (err) |
| 402 | goto err_free_inst; |
| 403 | |
| 404 | inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC | |
| 405 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); |
| 406 | inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg); |
| 407 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); |
| 408 | inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); |
| 409 | inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); |
| 410 | |
| 411 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx); |
| 412 | |
| 413 | inst->alg.init = cryptd_skcipher_init_tfm; |
| 414 | inst->alg.exit = cryptd_skcipher_exit_tfm; |
| 415 | |
| 416 | inst->alg.setkey = cryptd_skcipher_setkey; |
| 417 | inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue; |
| 418 | inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue; |
| 419 | |
| 420 | inst->free = cryptd_skcipher_free; |
| 421 | |
| 422 | err = skcipher_register_instance(tmpl, inst); |
| 423 | if (err) { |
| 424 | err_free_inst: |
| 425 | cryptd_skcipher_free(inst); |
| 426 | } |
| 427 | return err; |
| 428 | } |
| 429 | |
| 430 | static int cryptd_hash_init_tfm(struct crypto_ahash *tfm) |
| 431 | { |
| 432 | struct ahash_instance *inst = ahash_alg_instance(tfm); |
| 433 | struct hashd_instance_ctx *ictx = ahash_instance_ctx(inst); |
| 434 | struct crypto_shash_spawn *spawn = &ictx->spawn; |
| 435 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 436 | struct crypto_shash *hash; |
| 437 | |
| 438 | hash = crypto_spawn_shash(spawn); |
| 439 | if (IS_ERR(hash)) |
| 440 | return PTR_ERR(hash); |
| 441 | |
| 442 | ctx->child = hash; |
| 443 | crypto_ahash_set_reqsize(tfm, |
| 444 | sizeof(struct cryptd_hash_request_ctx) + |
| 445 | crypto_shash_descsize(hash)); |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int cryptd_hash_clone_tfm(struct crypto_ahash *ntfm, |
| 450 | struct crypto_ahash *tfm) |
| 451 | { |
| 452 | struct cryptd_hash_ctx *nctx = crypto_ahash_ctx(ntfm); |
| 453 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 454 | struct crypto_shash *hash; |
| 455 | |
| 456 | hash = crypto_clone_shash(ctx->child); |
| 457 | if (IS_ERR(hash)) |
| 458 | return PTR_ERR(hash); |
| 459 | |
| 460 | nctx->child = hash; |
| 461 | return 0; |
| 462 | } |
| 463 | |
| 464 | static void cryptd_hash_exit_tfm(struct crypto_ahash *tfm) |
| 465 | { |
| 466 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 467 | |
| 468 | crypto_free_shash(ctx->child); |
| 469 | } |
| 470 | |
| 471 | static int cryptd_hash_setkey(struct crypto_ahash *parent, |
| 472 | const u8 *key, unsigned int keylen) |
| 473 | { |
| 474 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); |
| 475 | struct crypto_shash *child = ctx->child; |
| 476 | |
| 477 | crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 478 | crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & |
| 479 | CRYPTO_TFM_REQ_MASK); |
| 480 | return crypto_shash_setkey(child, key, keylen); |
| 481 | } |
| 482 | |
| 483 | static int cryptd_hash_enqueue(struct ahash_request *req, |
| 484 | crypto_completion_t compl) |
| 485 | { |
| 486 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 487 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| 488 | struct cryptd_queue *queue = |
| 489 | cryptd_get_queue(crypto_ahash_tfm(tfm)); |
| 490 | |
| 491 | rctx->complete = req->base.complete; |
| 492 | rctx->data = req->base.data; |
| 493 | req->base.complete = compl; |
| 494 | req->base.data = req; |
| 495 | |
| 496 | return cryptd_enqueue_request(queue, &req->base); |
| 497 | } |
| 498 | |
| 499 | static struct shash_desc *cryptd_hash_prepare(struct ahash_request *req, |
| 500 | int err) |
| 501 | { |
| 502 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 503 | |
| 504 | req->base.complete = rctx->complete; |
| 505 | req->base.data = rctx->data; |
| 506 | |
| 507 | if (unlikely(err == -EINPROGRESS)) |
| 508 | return NULL; |
| 509 | |
| 510 | return &rctx->desc; |
| 511 | } |
| 512 | |
| 513 | static void cryptd_hash_complete(struct ahash_request *req, int err, |
| 514 | crypto_completion_t complete) |
| 515 | { |
| 516 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| 517 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 518 | int refcnt = refcount_read(&ctx->refcnt); |
| 519 | |
| 520 | local_bh_disable(); |
| 521 | ahash_request_complete(req, err); |
| 522 | local_bh_enable(); |
| 523 | |
| 524 | if (err == -EINPROGRESS) { |
| 525 | req->base.complete = complete; |
| 526 | req->base.data = req; |
| 527 | } else if (refcnt && refcount_dec_and_test(&ctx->refcnt)) |
| 528 | crypto_free_ahash(tfm); |
| 529 | } |
| 530 | |
| 531 | static void cryptd_hash_init(void *data, int err) |
| 532 | { |
| 533 | struct ahash_request *req = data; |
| 534 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| 535 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 536 | struct crypto_shash *child = ctx->child; |
| 537 | struct shash_desc *desc; |
| 538 | |
| 539 | desc = cryptd_hash_prepare(req, err); |
| 540 | if (unlikely(!desc)) |
| 541 | goto out; |
| 542 | |
| 543 | desc->tfm = child; |
| 544 | |
| 545 | err = crypto_shash_init(desc); |
| 546 | |
| 547 | out: |
| 548 | cryptd_hash_complete(req, err, cryptd_hash_init); |
| 549 | } |
| 550 | |
| 551 | static int cryptd_hash_init_enqueue(struct ahash_request *req) |
| 552 | { |
| 553 | return cryptd_hash_enqueue(req, cryptd_hash_init); |
| 554 | } |
| 555 | |
| 556 | static void cryptd_hash_update(void *data, int err) |
| 557 | { |
| 558 | struct ahash_request *req = data; |
| 559 | struct shash_desc *desc; |
| 560 | |
| 561 | desc = cryptd_hash_prepare(req, err); |
| 562 | if (likely(desc)) |
| 563 | err = shash_ahash_update(req, desc); |
| 564 | |
| 565 | cryptd_hash_complete(req, err, cryptd_hash_update); |
| 566 | } |
| 567 | |
| 568 | static int cryptd_hash_update_enqueue(struct ahash_request *req) |
| 569 | { |
| 570 | return cryptd_hash_enqueue(req, cryptd_hash_update); |
| 571 | } |
| 572 | |
| 573 | static void cryptd_hash_final(void *data, int err) |
| 574 | { |
| 575 | struct ahash_request *req = data; |
| 576 | struct shash_desc *desc; |
| 577 | |
| 578 | desc = cryptd_hash_prepare(req, err); |
| 579 | if (likely(desc)) |
| 580 | err = crypto_shash_final(desc, req->result); |
| 581 | |
| 582 | cryptd_hash_complete(req, err, cryptd_hash_final); |
| 583 | } |
| 584 | |
| 585 | static int cryptd_hash_final_enqueue(struct ahash_request *req) |
| 586 | { |
| 587 | return cryptd_hash_enqueue(req, cryptd_hash_final); |
| 588 | } |
| 589 | |
| 590 | static void cryptd_hash_finup(void *data, int err) |
| 591 | { |
| 592 | struct ahash_request *req = data; |
| 593 | struct shash_desc *desc; |
| 594 | |
| 595 | desc = cryptd_hash_prepare(req, err); |
| 596 | if (likely(desc)) |
| 597 | err = shash_ahash_finup(req, desc); |
| 598 | |
| 599 | cryptd_hash_complete(req, err, cryptd_hash_finup); |
| 600 | } |
| 601 | |
| 602 | static int cryptd_hash_finup_enqueue(struct ahash_request *req) |
| 603 | { |
| 604 | return cryptd_hash_enqueue(req, cryptd_hash_finup); |
| 605 | } |
| 606 | |
| 607 | static void cryptd_hash_digest(void *data, int err) |
| 608 | { |
| 609 | struct ahash_request *req = data; |
| 610 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| 611 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 612 | struct crypto_shash *child = ctx->child; |
| 613 | struct shash_desc *desc; |
| 614 | |
| 615 | desc = cryptd_hash_prepare(req, err); |
| 616 | if (unlikely(!desc)) |
| 617 | goto out; |
| 618 | |
| 619 | desc->tfm = child; |
| 620 | |
| 621 | err = shash_ahash_digest(req, desc); |
| 622 | |
| 623 | out: |
| 624 | cryptd_hash_complete(req, err, cryptd_hash_digest); |
| 625 | } |
| 626 | |
| 627 | static int cryptd_hash_digest_enqueue(struct ahash_request *req) |
| 628 | { |
| 629 | return cryptd_hash_enqueue(req, cryptd_hash_digest); |
| 630 | } |
| 631 | |
| 632 | static int cryptd_hash_export(struct ahash_request *req, void *out) |
| 633 | { |
| 634 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 635 | |
| 636 | return crypto_shash_export(&rctx->desc, out); |
| 637 | } |
| 638 | |
| 639 | static int cryptd_hash_import(struct ahash_request *req, const void *in) |
| 640 | { |
| 641 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| 642 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); |
| 643 | struct shash_desc *desc = cryptd_shash_desc(req); |
| 644 | |
| 645 | desc->tfm = ctx->child; |
| 646 | |
| 647 | return crypto_shash_import(desc, in); |
| 648 | } |
| 649 | |
| 650 | static void cryptd_hash_free(struct ahash_instance *inst) |
| 651 | { |
| 652 | struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst); |
| 653 | |
| 654 | crypto_drop_shash(&ctx->spawn); |
| 655 | kfree(inst); |
| 656 | } |
| 657 | |
| 658 | static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, |
| 659 | struct crypto_attr_type *algt, |
| 660 | struct cryptd_queue *queue) |
| 661 | { |
| 662 | struct hashd_instance_ctx *ctx; |
| 663 | struct ahash_instance *inst; |
| 664 | struct shash_alg *alg; |
| 665 | u32 type; |
| 666 | u32 mask; |
| 667 | int err; |
| 668 | |
| 669 | cryptd_type_and_mask(algt, &type, &mask); |
| 670 | |
| 671 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
| 672 | if (!inst) |
| 673 | return -ENOMEM; |
| 674 | |
| 675 | ctx = ahash_instance_ctx(inst); |
| 676 | ctx->queue = queue; |
| 677 | |
| 678 | err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst), |
| 679 | crypto_attr_alg_name(tb[1]), type, mask); |
| 680 | if (err) |
| 681 | goto err_free_inst; |
| 682 | alg = crypto_spawn_shash_alg(&ctx->spawn); |
| 683 | |
| 684 | err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base); |
| 685 | if (err) |
| 686 | goto err_free_inst; |
| 687 | |
| 688 | inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC | |
| 689 | (alg->base.cra_flags & (CRYPTO_ALG_INTERNAL| |
| 690 | CRYPTO_ALG_OPTIONAL_KEY)); |
| 691 | inst->alg.halg.digestsize = alg->digestsize; |
| 692 | inst->alg.halg.statesize = alg->statesize; |
| 693 | inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
| 694 | |
| 695 | inst->alg.init_tfm = cryptd_hash_init_tfm; |
| 696 | inst->alg.clone_tfm = cryptd_hash_clone_tfm; |
| 697 | inst->alg.exit_tfm = cryptd_hash_exit_tfm; |
| 698 | |
| 699 | inst->alg.init = cryptd_hash_init_enqueue; |
| 700 | inst->alg.update = cryptd_hash_update_enqueue; |
| 701 | inst->alg.final = cryptd_hash_final_enqueue; |
| 702 | inst->alg.finup = cryptd_hash_finup_enqueue; |
| 703 | inst->alg.export = cryptd_hash_export; |
| 704 | inst->alg.import = cryptd_hash_import; |
| 705 | if (crypto_shash_alg_has_setkey(alg)) |
| 706 | inst->alg.setkey = cryptd_hash_setkey; |
| 707 | inst->alg.digest = cryptd_hash_digest_enqueue; |
| 708 | |
| 709 | inst->free = cryptd_hash_free; |
| 710 | |
| 711 | err = ahash_register_instance(tmpl, inst); |
| 712 | if (err) { |
| 713 | err_free_inst: |
| 714 | cryptd_hash_free(inst); |
| 715 | } |
| 716 | return err; |
| 717 | } |
| 718 | |
| 719 | static int cryptd_aead_setkey(struct crypto_aead *parent, |
| 720 | const u8 *key, unsigned int keylen) |
| 721 | { |
| 722 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); |
| 723 | struct crypto_aead *child = ctx->child; |
| 724 | |
| 725 | return crypto_aead_setkey(child, key, keylen); |
| 726 | } |
| 727 | |
| 728 | static int cryptd_aead_setauthsize(struct crypto_aead *parent, |
| 729 | unsigned int authsize) |
| 730 | { |
| 731 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); |
| 732 | struct crypto_aead *child = ctx->child; |
| 733 | |
| 734 | return crypto_aead_setauthsize(child, authsize); |
| 735 | } |
| 736 | |
| 737 | static void cryptd_aead_crypt(struct aead_request *req, |
| 738 | struct crypto_aead *child, int err, |
| 739 | int (*crypt)(struct aead_request *req), |
| 740 | crypto_completion_t compl) |
| 741 | { |
| 742 | struct cryptd_aead_request_ctx *rctx; |
| 743 | struct aead_request *subreq; |
| 744 | struct cryptd_aead_ctx *ctx; |
| 745 | struct crypto_aead *tfm; |
| 746 | int refcnt; |
| 747 | |
| 748 | rctx = aead_request_ctx(req); |
| 749 | subreq = &rctx->req; |
| 750 | req->base.complete = subreq->base.complete; |
| 751 | req->base.data = subreq->base.data; |
| 752 | |
| 753 | tfm = crypto_aead_reqtfm(req); |
| 754 | |
| 755 | if (unlikely(err == -EINPROGRESS)) |
| 756 | goto out; |
| 757 | |
| 758 | aead_request_set_tfm(subreq, child); |
| 759 | aead_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, |
| 760 | NULL, NULL); |
| 761 | aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, |
| 762 | req->iv); |
| 763 | aead_request_set_ad(subreq, req->assoclen); |
| 764 | |
| 765 | err = crypt(subreq); |
| 766 | |
| 767 | out: |
| 768 | ctx = crypto_aead_ctx(tfm); |
| 769 | refcnt = refcount_read(&ctx->refcnt); |
| 770 | |
| 771 | local_bh_disable(); |
| 772 | aead_request_complete(req, err); |
| 773 | local_bh_enable(); |
| 774 | |
| 775 | if (err == -EINPROGRESS) { |
| 776 | subreq->base.complete = req->base.complete; |
| 777 | subreq->base.data = req->base.data; |
| 778 | req->base.complete = compl; |
| 779 | req->base.data = req; |
| 780 | } else if (refcnt && refcount_dec_and_test(&ctx->refcnt)) |
| 781 | crypto_free_aead(tfm); |
| 782 | } |
| 783 | |
| 784 | static void cryptd_aead_encrypt(void *data, int err) |
| 785 | { |
| 786 | struct aead_request *req = data; |
| 787 | struct cryptd_aead_ctx *ctx; |
| 788 | struct crypto_aead *child; |
| 789 | |
| 790 | ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); |
| 791 | child = ctx->child; |
| 792 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt, |
| 793 | cryptd_aead_encrypt); |
| 794 | } |
| 795 | |
| 796 | static void cryptd_aead_decrypt(void *data, int err) |
| 797 | { |
| 798 | struct aead_request *req = data; |
| 799 | struct cryptd_aead_ctx *ctx; |
| 800 | struct crypto_aead *child; |
| 801 | |
| 802 | ctx = crypto_aead_ctx(crypto_aead_reqtfm(req)); |
| 803 | child = ctx->child; |
| 804 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt, |
| 805 | cryptd_aead_decrypt); |
| 806 | } |
| 807 | |
| 808 | static int cryptd_aead_enqueue(struct aead_request *req, |
| 809 | crypto_completion_t compl) |
| 810 | { |
| 811 | struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req); |
| 812 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| 813 | struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm)); |
| 814 | struct aead_request *subreq = &rctx->req; |
| 815 | |
| 816 | subreq->base.complete = req->base.complete; |
| 817 | subreq->base.data = req->base.data; |
| 818 | req->base.complete = compl; |
| 819 | req->base.data = req; |
| 820 | return cryptd_enqueue_request(queue, &req->base); |
| 821 | } |
| 822 | |
| 823 | static int cryptd_aead_encrypt_enqueue(struct aead_request *req) |
| 824 | { |
| 825 | return cryptd_aead_enqueue(req, cryptd_aead_encrypt ); |
| 826 | } |
| 827 | |
| 828 | static int cryptd_aead_decrypt_enqueue(struct aead_request *req) |
| 829 | { |
| 830 | return cryptd_aead_enqueue(req, cryptd_aead_decrypt ); |
| 831 | } |
| 832 | |
| 833 | static int cryptd_aead_init_tfm(struct crypto_aead *tfm) |
| 834 | { |
| 835 | struct aead_instance *inst = aead_alg_instance(tfm); |
| 836 | struct aead_instance_ctx *ictx = aead_instance_ctx(inst); |
| 837 | struct crypto_aead_spawn *spawn = &ictx->aead_spawn; |
| 838 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
| 839 | struct crypto_aead *cipher; |
| 840 | |
| 841 | cipher = crypto_spawn_aead(spawn); |
| 842 | if (IS_ERR(cipher)) |
| 843 | return PTR_ERR(cipher); |
| 844 | |
| 845 | ctx->child = cipher; |
| 846 | crypto_aead_set_reqsize( |
| 847 | tfm, sizeof(struct cryptd_aead_request_ctx) + |
| 848 | crypto_aead_reqsize(cipher)); |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) |
| 853 | { |
| 854 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
| 855 | crypto_free_aead(ctx->child); |
| 856 | } |
| 857 | |
| 858 | static void cryptd_aead_free(struct aead_instance *inst) |
| 859 | { |
| 860 | struct aead_instance_ctx *ctx = aead_instance_ctx(inst); |
| 861 | |
| 862 | crypto_drop_aead(&ctx->aead_spawn); |
| 863 | kfree(inst); |
| 864 | } |
| 865 | |
| 866 | static int cryptd_create_aead(struct crypto_template *tmpl, |
| 867 | struct rtattr **tb, |
| 868 | struct crypto_attr_type *algt, |
| 869 | struct cryptd_queue *queue) |
| 870 | { |
| 871 | struct aead_instance_ctx *ctx; |
| 872 | struct aead_instance *inst; |
| 873 | struct aead_alg *alg; |
| 874 | u32 type; |
| 875 | u32 mask; |
| 876 | int err; |
| 877 | |
| 878 | cryptd_type_and_mask(algt, &type, &mask); |
| 879 | |
| 880 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
| 881 | if (!inst) |
| 882 | return -ENOMEM; |
| 883 | |
| 884 | ctx = aead_instance_ctx(inst); |
| 885 | ctx->queue = queue; |
| 886 | |
| 887 | err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst), |
| 888 | crypto_attr_alg_name(tb[1]), type, mask); |
| 889 | if (err) |
| 890 | goto err_free_inst; |
| 891 | |
| 892 | alg = crypto_spawn_aead_alg(&ctx->aead_spawn); |
| 893 | err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); |
| 894 | if (err) |
| 895 | goto err_free_inst; |
| 896 | |
| 897 | inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC | |
| 898 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); |
| 899 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); |
| 900 | |
| 901 | inst->alg.ivsize = crypto_aead_alg_ivsize(alg); |
| 902 | inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); |
| 903 | |
| 904 | inst->alg.init = cryptd_aead_init_tfm; |
| 905 | inst->alg.exit = cryptd_aead_exit_tfm; |
| 906 | inst->alg.setkey = cryptd_aead_setkey; |
| 907 | inst->alg.setauthsize = cryptd_aead_setauthsize; |
| 908 | inst->alg.encrypt = cryptd_aead_encrypt_enqueue; |
| 909 | inst->alg.decrypt = cryptd_aead_decrypt_enqueue; |
| 910 | |
| 911 | inst->free = cryptd_aead_free; |
| 912 | |
| 913 | err = aead_register_instance(tmpl, inst); |
| 914 | if (err) { |
| 915 | err_free_inst: |
| 916 | cryptd_aead_free(inst); |
| 917 | } |
| 918 | return err; |
| 919 | } |
| 920 | |
| 921 | static struct cryptd_queue queue; |
| 922 | |
| 923 | static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) |
| 924 | { |
| 925 | struct crypto_attr_type *algt; |
| 926 | |
| 927 | algt = crypto_get_attr_type(tb); |
| 928 | if (IS_ERR(algt)) |
| 929 | return PTR_ERR(algt); |
| 930 | |
| 931 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { |
| 932 | case CRYPTO_ALG_TYPE_SKCIPHER: |
| 933 | return cryptd_create_skcipher(tmpl, tb, algt, &queue); |
| 934 | case CRYPTO_ALG_TYPE_HASH: |
| 935 | return cryptd_create_hash(tmpl, tb, algt, &queue); |
| 936 | case CRYPTO_ALG_TYPE_AEAD: |
| 937 | return cryptd_create_aead(tmpl, tb, algt, &queue); |
| 938 | } |
| 939 | |
| 940 | return -EINVAL; |
| 941 | } |
| 942 | |
| 943 | static struct crypto_template cryptd_tmpl = { |
| 944 | .name = "cryptd", |
| 945 | .create = cryptd_create, |
| 946 | .module = THIS_MODULE, |
| 947 | }; |
| 948 | |
| 949 | struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name, |
| 950 | u32 type, u32 mask) |
| 951 | { |
| 952 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
| 953 | struct cryptd_skcipher_ctx *ctx; |
| 954 | struct crypto_skcipher *tfm; |
| 955 | |
| 956 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, |
| 957 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 958 | return ERR_PTR(-EINVAL); |
| 959 | |
| 960 | tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask); |
| 961 | if (IS_ERR(tfm)) |
| 962 | return ERR_CAST(tfm); |
| 963 | |
| 964 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { |
| 965 | crypto_free_skcipher(tfm); |
| 966 | return ERR_PTR(-EINVAL); |
| 967 | } |
| 968 | |
| 969 | ctx = crypto_skcipher_ctx(tfm); |
| 970 | refcount_set(&ctx->refcnt, 1); |
| 971 | |
| 972 | return container_of(tfm, struct cryptd_skcipher, base); |
| 973 | } |
| 974 | EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher); |
| 975 | |
| 976 | struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm) |
| 977 | { |
| 978 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); |
| 979 | |
| 980 | return ctx->child; |
| 981 | } |
| 982 | EXPORT_SYMBOL_GPL(cryptd_skcipher_child); |
| 983 | |
| 984 | bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm) |
| 985 | { |
| 986 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); |
| 987 | |
| 988 | return refcount_read(&ctx->refcnt) - 1; |
| 989 | } |
| 990 | EXPORT_SYMBOL_GPL(cryptd_skcipher_queued); |
| 991 | |
| 992 | void cryptd_free_skcipher(struct cryptd_skcipher *tfm) |
| 993 | { |
| 994 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); |
| 995 | |
| 996 | if (refcount_dec_and_test(&ctx->refcnt)) |
| 997 | crypto_free_skcipher(&tfm->base); |
| 998 | } |
| 999 | EXPORT_SYMBOL_GPL(cryptd_free_skcipher); |
| 1000 | |
| 1001 | struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, |
| 1002 | u32 type, u32 mask) |
| 1003 | { |
| 1004 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
| 1005 | struct cryptd_hash_ctx *ctx; |
| 1006 | struct crypto_ahash *tfm; |
| 1007 | |
| 1008 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, |
| 1009 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 1010 | return ERR_PTR(-EINVAL); |
| 1011 | tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask); |
| 1012 | if (IS_ERR(tfm)) |
| 1013 | return ERR_CAST(tfm); |
| 1014 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { |
| 1015 | crypto_free_ahash(tfm); |
| 1016 | return ERR_PTR(-EINVAL); |
| 1017 | } |
| 1018 | |
| 1019 | ctx = crypto_ahash_ctx(tfm); |
| 1020 | refcount_set(&ctx->refcnt, 1); |
| 1021 | |
| 1022 | return __cryptd_ahash_cast(tfm); |
| 1023 | } |
| 1024 | EXPORT_SYMBOL_GPL(cryptd_alloc_ahash); |
| 1025 | |
| 1026 | struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm) |
| 1027 | { |
| 1028 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
| 1029 | |
| 1030 | return ctx->child; |
| 1031 | } |
| 1032 | EXPORT_SYMBOL_GPL(cryptd_ahash_child); |
| 1033 | |
| 1034 | struct shash_desc *cryptd_shash_desc(struct ahash_request *req) |
| 1035 | { |
| 1036 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); |
| 1037 | return &rctx->desc; |
| 1038 | } |
| 1039 | EXPORT_SYMBOL_GPL(cryptd_shash_desc); |
| 1040 | |
| 1041 | bool cryptd_ahash_queued(struct cryptd_ahash *tfm) |
| 1042 | { |
| 1043 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
| 1044 | |
| 1045 | return refcount_read(&ctx->refcnt) - 1; |
| 1046 | } |
| 1047 | EXPORT_SYMBOL_GPL(cryptd_ahash_queued); |
| 1048 | |
| 1049 | void cryptd_free_ahash(struct cryptd_ahash *tfm) |
| 1050 | { |
| 1051 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
| 1052 | |
| 1053 | if (refcount_dec_and_test(&ctx->refcnt)) |
| 1054 | crypto_free_ahash(&tfm->base); |
| 1055 | } |
| 1056 | EXPORT_SYMBOL_GPL(cryptd_free_ahash); |
| 1057 | |
| 1058 | struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, |
| 1059 | u32 type, u32 mask) |
| 1060 | { |
| 1061 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; |
| 1062 | struct cryptd_aead_ctx *ctx; |
| 1063 | struct crypto_aead *tfm; |
| 1064 | |
| 1065 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, |
| 1066 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 1067 | return ERR_PTR(-EINVAL); |
| 1068 | tfm = crypto_alloc_aead(cryptd_alg_name, type, mask); |
| 1069 | if (IS_ERR(tfm)) |
| 1070 | return ERR_CAST(tfm); |
| 1071 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { |
| 1072 | crypto_free_aead(tfm); |
| 1073 | return ERR_PTR(-EINVAL); |
| 1074 | } |
| 1075 | |
| 1076 | ctx = crypto_aead_ctx(tfm); |
| 1077 | refcount_set(&ctx->refcnt, 1); |
| 1078 | |
| 1079 | return __cryptd_aead_cast(tfm); |
| 1080 | } |
| 1081 | EXPORT_SYMBOL_GPL(cryptd_alloc_aead); |
| 1082 | |
| 1083 | struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm) |
| 1084 | { |
| 1085 | struct cryptd_aead_ctx *ctx; |
| 1086 | ctx = crypto_aead_ctx(&tfm->base); |
| 1087 | return ctx->child; |
| 1088 | } |
| 1089 | EXPORT_SYMBOL_GPL(cryptd_aead_child); |
| 1090 | |
| 1091 | bool cryptd_aead_queued(struct cryptd_aead *tfm) |
| 1092 | { |
| 1093 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); |
| 1094 | |
| 1095 | return refcount_read(&ctx->refcnt) - 1; |
| 1096 | } |
| 1097 | EXPORT_SYMBOL_GPL(cryptd_aead_queued); |
| 1098 | |
| 1099 | void cryptd_free_aead(struct cryptd_aead *tfm) |
| 1100 | { |
| 1101 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); |
| 1102 | |
| 1103 | if (refcount_dec_and_test(&ctx->refcnt)) |
| 1104 | crypto_free_aead(&tfm->base); |
| 1105 | } |
| 1106 | EXPORT_SYMBOL_GPL(cryptd_free_aead); |
| 1107 | |
| 1108 | static int __init cryptd_init(void) |
| 1109 | { |
| 1110 | int err; |
| 1111 | |
| 1112 | cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE, |
| 1113 | 1); |
| 1114 | if (!cryptd_wq) |
| 1115 | return -ENOMEM; |
| 1116 | |
| 1117 | err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen); |
| 1118 | if (err) |
| 1119 | goto err_destroy_wq; |
| 1120 | |
| 1121 | err = crypto_register_template(&cryptd_tmpl); |
| 1122 | if (err) |
| 1123 | goto err_fini_queue; |
| 1124 | |
| 1125 | return 0; |
| 1126 | |
| 1127 | err_fini_queue: |
| 1128 | cryptd_fini_queue(&queue); |
| 1129 | err_destroy_wq: |
| 1130 | destroy_workqueue(cryptd_wq); |
| 1131 | return err; |
| 1132 | } |
| 1133 | |
| 1134 | static void __exit cryptd_exit(void) |
| 1135 | { |
| 1136 | destroy_workqueue(cryptd_wq); |
| 1137 | cryptd_fini_queue(&queue); |
| 1138 | crypto_unregister_template(&cryptd_tmpl); |
| 1139 | } |
| 1140 | |
| 1141 | subsys_initcall(cryptd_init); |
| 1142 | module_exit(cryptd_exit); |
| 1143 | |
| 1144 | MODULE_LICENSE("GPL"); |
| 1145 | MODULE_DESCRIPTION("Software async crypto daemon"); |
| 1146 | MODULE_ALIAS_CRYPTO("cryptd"); |