1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Software async crypto daemon.
5 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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.
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/atomic.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>
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");
34 static struct workqueue_struct *cryptd_wq;
36 struct cryptd_cpu_queue {
37 struct crypto_queue queue;
38 struct work_struct work;
42 struct cryptd_cpu_queue __percpu *cpu_queue;
45 struct cryptd_instance_ctx {
46 struct crypto_spawn spawn;
47 struct cryptd_queue *queue;
50 struct skcipherd_instance_ctx {
51 struct crypto_skcipher_spawn spawn;
52 struct cryptd_queue *queue;
55 struct hashd_instance_ctx {
56 struct crypto_shash_spawn spawn;
57 struct cryptd_queue *queue;
60 struct aead_instance_ctx {
61 struct crypto_aead_spawn aead_spawn;
62 struct cryptd_queue *queue;
65 struct cryptd_skcipher_ctx {
67 struct crypto_sync_skcipher *child;
70 struct cryptd_skcipher_request_ctx {
71 crypto_completion_t complete;
74 struct cryptd_hash_ctx {
76 struct crypto_shash *child;
79 struct cryptd_hash_request_ctx {
80 crypto_completion_t complete;
81 struct shash_desc desc;
84 struct cryptd_aead_ctx {
86 struct crypto_aead *child;
89 struct cryptd_aead_request_ctx {
90 crypto_completion_t complete;
93 static void cryptd_queue_worker(struct work_struct *work);
95 static int cryptd_init_queue(struct cryptd_queue *queue,
96 unsigned int max_cpu_qlen)
99 struct cryptd_cpu_queue *cpu_queue;
101 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
102 if (!queue->cpu_queue)
104 for_each_possible_cpu(cpu) {
105 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
106 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
107 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
109 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
113 static void cryptd_fini_queue(struct cryptd_queue *queue)
116 struct cryptd_cpu_queue *cpu_queue;
118 for_each_possible_cpu(cpu) {
119 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
120 BUG_ON(cpu_queue->queue.qlen);
122 free_percpu(queue->cpu_queue);
125 static int cryptd_enqueue_request(struct cryptd_queue *queue,
126 struct crypto_async_request *request)
129 struct cryptd_cpu_queue *cpu_queue;
133 cpu_queue = this_cpu_ptr(queue->cpu_queue);
134 err = crypto_enqueue_request(&cpu_queue->queue, request);
136 refcnt = crypto_tfm_ctx(request->tfm);
141 queue_work_on(cpu, cryptd_wq, &cpu_queue->work);
143 if (!atomic_read(refcnt))
154 /* Called in workqueue context, do one real cryption work (via
155 * req->complete) and reschedule itself if there are more work to
157 static void cryptd_queue_worker(struct work_struct *work)
159 struct cryptd_cpu_queue *cpu_queue;
160 struct crypto_async_request *req, *backlog;
162 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
164 * Only handle one request at a time to avoid hogging crypto workqueue.
165 * preempt_disable/enable is used to prevent being preempted by
166 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
167 * cryptd_enqueue_request() being accessed from software interrupts.
171 backlog = crypto_get_backlog(&cpu_queue->queue);
172 req = crypto_dequeue_request(&cpu_queue->queue);
180 backlog->complete(backlog, -EINPROGRESS);
181 req->complete(req, 0);
183 if (cpu_queue->queue.qlen)
184 queue_work(cryptd_wq, &cpu_queue->work);
187 static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
189 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
190 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
194 static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
197 struct crypto_attr_type *algt;
199 algt = crypto_get_attr_type(tb);
203 *type |= algt->type & CRYPTO_ALG_INTERNAL;
204 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
207 static int cryptd_init_instance(struct crypto_instance *inst,
208 struct crypto_alg *alg)
210 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
212 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
213 return -ENAMETOOLONG;
215 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
217 inst->alg.cra_priority = alg->cra_priority + 50;
218 inst->alg.cra_blocksize = alg->cra_blocksize;
219 inst->alg.cra_alignmask = alg->cra_alignmask;
224 static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
228 struct crypto_instance *inst;
231 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
233 return ERR_PTR(-ENOMEM);
235 inst = (void *)(p + head);
237 err = cryptd_init_instance(inst, alg);
250 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
251 const u8 *key, unsigned int keylen)
253 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
254 struct crypto_sync_skcipher *child = ctx->child;
257 crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
258 crypto_sync_skcipher_set_flags(child,
259 crypto_skcipher_get_flags(parent) &
260 CRYPTO_TFM_REQ_MASK);
261 err = crypto_sync_skcipher_setkey(child, key, keylen);
262 crypto_skcipher_set_flags(parent,
263 crypto_sync_skcipher_get_flags(child) &
264 CRYPTO_TFM_RES_MASK);
268 static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
270 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
271 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
272 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
273 int refcnt = atomic_read(&ctx->refcnt);
276 rctx->complete(&req->base, err);
279 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
280 crypto_free_skcipher(tfm);
283 static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
286 struct skcipher_request *req = skcipher_request_cast(base);
287 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
288 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
289 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
290 struct crypto_sync_skcipher *child = ctx->child;
291 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
293 if (unlikely(err == -EINPROGRESS))
296 skcipher_request_set_sync_tfm(subreq, child);
297 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
299 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
302 err = crypto_skcipher_encrypt(subreq);
303 skcipher_request_zero(subreq);
305 req->base.complete = rctx->complete;
308 cryptd_skcipher_complete(req, err);
311 static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
314 struct skcipher_request *req = skcipher_request_cast(base);
315 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
316 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
317 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
318 struct crypto_sync_skcipher *child = ctx->child;
319 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
321 if (unlikely(err == -EINPROGRESS))
324 skcipher_request_set_sync_tfm(subreq, child);
325 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
327 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
330 err = crypto_skcipher_decrypt(subreq);
331 skcipher_request_zero(subreq);
333 req->base.complete = rctx->complete;
336 cryptd_skcipher_complete(req, err);
339 static int cryptd_skcipher_enqueue(struct skcipher_request *req,
340 crypto_completion_t compl)
342 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
343 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
344 struct cryptd_queue *queue;
346 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
347 rctx->complete = req->base.complete;
348 req->base.complete = compl;
350 return cryptd_enqueue_request(queue, &req->base);
353 static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
355 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
358 static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
360 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
363 static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
365 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
366 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
367 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
368 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
369 struct crypto_skcipher *cipher;
371 cipher = crypto_spawn_skcipher(spawn);
373 return PTR_ERR(cipher);
375 ctx->child = (struct crypto_sync_skcipher *)cipher;
376 crypto_skcipher_set_reqsize(
377 tfm, sizeof(struct cryptd_skcipher_request_ctx));
381 static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
383 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
385 crypto_free_sync_skcipher(ctx->child);
388 static void cryptd_skcipher_free(struct skcipher_instance *inst)
390 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
392 crypto_drop_skcipher(&ctx->spawn);
396 static int cryptd_create_skcipher(struct crypto_template *tmpl,
398 struct cryptd_queue *queue)
400 struct skcipherd_instance_ctx *ctx;
401 struct skcipher_instance *inst;
402 struct skcipher_alg *alg;
409 mask = CRYPTO_ALG_ASYNC;
411 cryptd_check_internal(tb, &type, &mask);
413 name = crypto_attr_alg_name(tb[1]);
415 return PTR_ERR(name);
417 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
421 ctx = skcipher_instance_ctx(inst);
424 crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
425 err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
429 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
430 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
432 goto out_drop_skcipher;
434 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
435 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
437 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
438 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
439 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
440 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
442 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
444 inst->alg.init = cryptd_skcipher_init_tfm;
445 inst->alg.exit = cryptd_skcipher_exit_tfm;
447 inst->alg.setkey = cryptd_skcipher_setkey;
448 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
449 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
451 inst->free = cryptd_skcipher_free;
453 err = skcipher_register_instance(tmpl, inst);
456 crypto_drop_skcipher(&ctx->spawn);
463 static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
465 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
466 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
467 struct crypto_shash_spawn *spawn = &ictx->spawn;
468 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
469 struct crypto_shash *hash;
471 hash = crypto_spawn_shash(spawn);
473 return PTR_ERR(hash);
476 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
477 sizeof(struct cryptd_hash_request_ctx) +
478 crypto_shash_descsize(hash));
482 static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
484 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
486 crypto_free_shash(ctx->child);
489 static int cryptd_hash_setkey(struct crypto_ahash *parent,
490 const u8 *key, unsigned int keylen)
492 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
493 struct crypto_shash *child = ctx->child;
496 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
497 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
498 CRYPTO_TFM_REQ_MASK);
499 err = crypto_shash_setkey(child, key, keylen);
500 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
501 CRYPTO_TFM_RES_MASK);
505 static int cryptd_hash_enqueue(struct ahash_request *req,
506 crypto_completion_t compl)
508 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
509 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
510 struct cryptd_queue *queue =
511 cryptd_get_queue(crypto_ahash_tfm(tfm));
513 rctx->complete = req->base.complete;
514 req->base.complete = compl;
516 return cryptd_enqueue_request(queue, &req->base);
519 static void cryptd_hash_complete(struct ahash_request *req, int err)
521 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
522 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
523 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
524 int refcnt = atomic_read(&ctx->refcnt);
527 rctx->complete(&req->base, err);
530 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
531 crypto_free_ahash(tfm);
534 static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
536 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
537 struct crypto_shash *child = ctx->child;
538 struct ahash_request *req = ahash_request_cast(req_async);
539 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
540 struct shash_desc *desc = &rctx->desc;
542 if (unlikely(err == -EINPROGRESS))
547 err = crypto_shash_init(desc);
549 req->base.complete = rctx->complete;
552 cryptd_hash_complete(req, err);
555 static int cryptd_hash_init_enqueue(struct ahash_request *req)
557 return cryptd_hash_enqueue(req, cryptd_hash_init);
560 static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
562 struct ahash_request *req = ahash_request_cast(req_async);
563 struct cryptd_hash_request_ctx *rctx;
565 rctx = ahash_request_ctx(req);
567 if (unlikely(err == -EINPROGRESS))
570 err = shash_ahash_update(req, &rctx->desc);
572 req->base.complete = rctx->complete;
575 cryptd_hash_complete(req, err);
578 static int cryptd_hash_update_enqueue(struct ahash_request *req)
580 return cryptd_hash_enqueue(req, cryptd_hash_update);
583 static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
585 struct ahash_request *req = ahash_request_cast(req_async);
586 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
588 if (unlikely(err == -EINPROGRESS))
591 err = crypto_shash_final(&rctx->desc, req->result);
593 req->base.complete = rctx->complete;
596 cryptd_hash_complete(req, err);
599 static int cryptd_hash_final_enqueue(struct ahash_request *req)
601 return cryptd_hash_enqueue(req, cryptd_hash_final);
604 static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
606 struct ahash_request *req = ahash_request_cast(req_async);
607 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
609 if (unlikely(err == -EINPROGRESS))
612 err = shash_ahash_finup(req, &rctx->desc);
614 req->base.complete = rctx->complete;
617 cryptd_hash_complete(req, err);
620 static int cryptd_hash_finup_enqueue(struct ahash_request *req)
622 return cryptd_hash_enqueue(req, cryptd_hash_finup);
625 static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
627 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
628 struct crypto_shash *child = ctx->child;
629 struct ahash_request *req = ahash_request_cast(req_async);
630 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
631 struct shash_desc *desc = &rctx->desc;
633 if (unlikely(err == -EINPROGRESS))
638 err = shash_ahash_digest(req, desc);
640 req->base.complete = rctx->complete;
643 cryptd_hash_complete(req, err);
646 static int cryptd_hash_digest_enqueue(struct ahash_request *req)
648 return cryptd_hash_enqueue(req, cryptd_hash_digest);
651 static int cryptd_hash_export(struct ahash_request *req, void *out)
653 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
655 return crypto_shash_export(&rctx->desc, out);
658 static int cryptd_hash_import(struct ahash_request *req, const void *in)
660 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
661 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
662 struct shash_desc *desc = cryptd_shash_desc(req);
664 desc->tfm = ctx->child;
666 return crypto_shash_import(desc, in);
669 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
670 struct cryptd_queue *queue)
672 struct hashd_instance_ctx *ctx;
673 struct ahash_instance *inst;
674 struct shash_alg *salg;
675 struct crypto_alg *alg;
680 cryptd_check_internal(tb, &type, &mask);
682 salg = shash_attr_alg(tb[1], type, mask);
684 return PTR_ERR(salg);
687 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
693 ctx = ahash_instance_ctx(inst);
696 err = crypto_init_shash_spawn(&ctx->spawn, salg,
697 ahash_crypto_instance(inst));
701 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
702 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
703 CRYPTO_ALG_OPTIONAL_KEY));
705 inst->alg.halg.digestsize = salg->digestsize;
706 inst->alg.halg.statesize = salg->statesize;
707 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
709 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
710 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
712 inst->alg.init = cryptd_hash_init_enqueue;
713 inst->alg.update = cryptd_hash_update_enqueue;
714 inst->alg.final = cryptd_hash_final_enqueue;
715 inst->alg.finup = cryptd_hash_finup_enqueue;
716 inst->alg.export = cryptd_hash_export;
717 inst->alg.import = cryptd_hash_import;
718 if (crypto_shash_alg_has_setkey(salg))
719 inst->alg.setkey = cryptd_hash_setkey;
720 inst->alg.digest = cryptd_hash_digest_enqueue;
722 err = ahash_register_instance(tmpl, inst);
724 crypto_drop_shash(&ctx->spawn);
734 static int cryptd_aead_setkey(struct crypto_aead *parent,
735 const u8 *key, unsigned int keylen)
737 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
738 struct crypto_aead *child = ctx->child;
740 return crypto_aead_setkey(child, key, keylen);
743 static int cryptd_aead_setauthsize(struct crypto_aead *parent,
744 unsigned int authsize)
746 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
747 struct crypto_aead *child = ctx->child;
749 return crypto_aead_setauthsize(child, authsize);
752 static void cryptd_aead_crypt(struct aead_request *req,
753 struct crypto_aead *child,
755 int (*crypt)(struct aead_request *req))
757 struct cryptd_aead_request_ctx *rctx;
758 struct cryptd_aead_ctx *ctx;
759 crypto_completion_t compl;
760 struct crypto_aead *tfm;
763 rctx = aead_request_ctx(req);
764 compl = rctx->complete;
766 tfm = crypto_aead_reqtfm(req);
768 if (unlikely(err == -EINPROGRESS))
770 aead_request_set_tfm(req, child);
774 ctx = crypto_aead_ctx(tfm);
775 refcnt = atomic_read(&ctx->refcnt);
778 compl(&req->base, err);
781 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
782 crypto_free_aead(tfm);
785 static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
787 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
788 struct crypto_aead *child = ctx->child;
789 struct aead_request *req;
791 req = container_of(areq, struct aead_request, base);
792 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
795 static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
797 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
798 struct crypto_aead *child = ctx->child;
799 struct aead_request *req;
801 req = container_of(areq, struct aead_request, base);
802 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
805 static int cryptd_aead_enqueue(struct aead_request *req,
806 crypto_completion_t compl)
808 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
809 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
810 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
812 rctx->complete = req->base.complete;
813 req->base.complete = compl;
814 return cryptd_enqueue_request(queue, &req->base);
817 static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
819 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
822 static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
824 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
827 static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
829 struct aead_instance *inst = aead_alg_instance(tfm);
830 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
831 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
832 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
833 struct crypto_aead *cipher;
835 cipher = crypto_spawn_aead(spawn);
837 return PTR_ERR(cipher);
840 crypto_aead_set_reqsize(
841 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
842 crypto_aead_reqsize(cipher)));
846 static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
848 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
849 crypto_free_aead(ctx->child);
852 static int cryptd_create_aead(struct crypto_template *tmpl,
854 struct cryptd_queue *queue)
856 struct aead_instance_ctx *ctx;
857 struct aead_instance *inst;
858 struct aead_alg *alg;
861 u32 mask = CRYPTO_ALG_ASYNC;
864 cryptd_check_internal(tb, &type, &mask);
866 name = crypto_attr_alg_name(tb[1]);
868 return PTR_ERR(name);
870 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
874 ctx = aead_instance_ctx(inst);
877 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
878 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
882 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
883 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
887 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
888 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
889 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
891 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
892 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
894 inst->alg.init = cryptd_aead_init_tfm;
895 inst->alg.exit = cryptd_aead_exit_tfm;
896 inst->alg.setkey = cryptd_aead_setkey;
897 inst->alg.setauthsize = cryptd_aead_setauthsize;
898 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
899 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
901 err = aead_register_instance(tmpl, inst);
904 crypto_drop_aead(&ctx->aead_spawn);
911 static struct cryptd_queue queue;
913 static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
915 struct crypto_attr_type *algt;
917 algt = crypto_get_attr_type(tb);
919 return PTR_ERR(algt);
921 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
922 case CRYPTO_ALG_TYPE_BLKCIPHER:
923 return cryptd_create_skcipher(tmpl, tb, &queue);
924 case CRYPTO_ALG_TYPE_HASH:
925 return cryptd_create_hash(tmpl, tb, &queue);
926 case CRYPTO_ALG_TYPE_AEAD:
927 return cryptd_create_aead(tmpl, tb, &queue);
933 static void cryptd_free(struct crypto_instance *inst)
935 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
936 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
937 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
939 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
940 case CRYPTO_ALG_TYPE_AHASH:
941 crypto_drop_shash(&hctx->spawn);
942 kfree(ahash_instance(inst));
944 case CRYPTO_ALG_TYPE_AEAD:
945 crypto_drop_aead(&aead_ctx->aead_spawn);
946 kfree(aead_instance(inst));
949 crypto_drop_spawn(&ctx->spawn);
954 static struct crypto_template cryptd_tmpl = {
956 .create = cryptd_create,
958 .module = THIS_MODULE,
961 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
964 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
965 struct cryptd_skcipher_ctx *ctx;
966 struct crypto_skcipher *tfm;
968 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
969 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
970 return ERR_PTR(-EINVAL);
972 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
974 return ERR_CAST(tfm);
976 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
977 crypto_free_skcipher(tfm);
978 return ERR_PTR(-EINVAL);
981 ctx = crypto_skcipher_ctx(tfm);
982 atomic_set(&ctx->refcnt, 1);
984 return container_of(tfm, struct cryptd_skcipher, base);
986 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
988 struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
990 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
992 return &ctx->child->base;
994 EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
996 bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
998 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1000 return atomic_read(&ctx->refcnt) - 1;
1002 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1004 void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1006 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1008 if (atomic_dec_and_test(&ctx->refcnt))
1009 crypto_free_skcipher(&tfm->base);
1011 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1013 struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1016 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1017 struct cryptd_hash_ctx *ctx;
1018 struct crypto_ahash *tfm;
1020 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1021 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1022 return ERR_PTR(-EINVAL);
1023 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1025 return ERR_CAST(tfm);
1026 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1027 crypto_free_ahash(tfm);
1028 return ERR_PTR(-EINVAL);
1031 ctx = crypto_ahash_ctx(tfm);
1032 atomic_set(&ctx->refcnt, 1);
1034 return __cryptd_ahash_cast(tfm);
1036 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1038 struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1040 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1044 EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1046 struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1048 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1051 EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1053 bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1055 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1057 return atomic_read(&ctx->refcnt) - 1;
1059 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1061 void cryptd_free_ahash(struct cryptd_ahash *tfm)
1063 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1065 if (atomic_dec_and_test(&ctx->refcnt))
1066 crypto_free_ahash(&tfm->base);
1068 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1070 struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1073 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1074 struct cryptd_aead_ctx *ctx;
1075 struct crypto_aead *tfm;
1077 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1078 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1079 return ERR_PTR(-EINVAL);
1080 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1082 return ERR_CAST(tfm);
1083 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1084 crypto_free_aead(tfm);
1085 return ERR_PTR(-EINVAL);
1088 ctx = crypto_aead_ctx(tfm);
1089 atomic_set(&ctx->refcnt, 1);
1091 return __cryptd_aead_cast(tfm);
1093 EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1095 struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1097 struct cryptd_aead_ctx *ctx;
1098 ctx = crypto_aead_ctx(&tfm->base);
1101 EXPORT_SYMBOL_GPL(cryptd_aead_child);
1103 bool cryptd_aead_queued(struct cryptd_aead *tfm)
1105 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1107 return atomic_read(&ctx->refcnt) - 1;
1109 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1111 void cryptd_free_aead(struct cryptd_aead *tfm)
1113 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1115 if (atomic_dec_and_test(&ctx->refcnt))
1116 crypto_free_aead(&tfm->base);
1118 EXPORT_SYMBOL_GPL(cryptd_free_aead);
1120 static int __init cryptd_init(void)
1124 cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1129 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1131 goto err_destroy_wq;
1133 err = crypto_register_template(&cryptd_tmpl);
1135 goto err_fini_queue;
1140 cryptd_fini_queue(&queue);
1142 destroy_workqueue(cryptd_wq);
1146 static void __exit cryptd_exit(void)
1148 destroy_workqueue(cryptd_wq);
1149 cryptd_fini_queue(&queue);
1150 crypto_unregister_template(&cryptd_tmpl);
1153 subsys_initcall(cryptd_init);
1154 module_exit(cryptd_exit);
1156 MODULE_LICENSE("GPL");
1157 MODULE_DESCRIPTION("Software async crypto daemon");
1158 MODULE_ALIAS_CRYPTO("cryptd");