1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Software async crypto daemon.
7 * Added AEAD support to cryptd.
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 <crypto/crypto_wq.h>
20 #include <linux/atomic.h>
21 #include <linux/err.h>
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/module.h>
26 #include <linux/scatterlist.h>
27 #include <linux/sched.h>
28 #include <linux/slab.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 struct cryptd_cpu_queue {
35 struct crypto_queue queue;
36 struct work_struct work;
40 struct cryptd_cpu_queue __percpu *cpu_queue;
43 struct cryptd_instance_ctx {
44 struct crypto_spawn spawn;
45 struct cryptd_queue *queue;
48 struct skcipherd_instance_ctx {
49 struct crypto_skcipher_spawn spawn;
50 struct cryptd_queue *queue;
53 struct hashd_instance_ctx {
54 struct crypto_shash_spawn spawn;
55 struct cryptd_queue *queue;
58 struct aead_instance_ctx {
59 struct crypto_aead_spawn aead_spawn;
60 struct cryptd_queue *queue;
63 struct cryptd_skcipher_ctx {
65 struct crypto_sync_skcipher *child;
68 struct cryptd_skcipher_request_ctx {
69 crypto_completion_t complete;
72 struct cryptd_hash_ctx {
74 struct crypto_shash *child;
77 struct cryptd_hash_request_ctx {
78 crypto_completion_t complete;
79 struct shash_desc desc;
82 struct cryptd_aead_ctx {
84 struct crypto_aead *child;
87 struct cryptd_aead_request_ctx {
88 crypto_completion_t complete;
91 static void cryptd_queue_worker(struct work_struct *work);
93 static int cryptd_init_queue(struct cryptd_queue *queue,
94 unsigned int max_cpu_qlen)
97 struct cryptd_cpu_queue *cpu_queue;
99 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
100 if (!queue->cpu_queue)
102 for_each_possible_cpu(cpu) {
103 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
104 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
105 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
107 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
111 static void cryptd_fini_queue(struct cryptd_queue *queue)
114 struct cryptd_cpu_queue *cpu_queue;
116 for_each_possible_cpu(cpu) {
117 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
118 BUG_ON(cpu_queue->queue.qlen);
120 free_percpu(queue->cpu_queue);
123 static int cryptd_enqueue_request(struct cryptd_queue *queue,
124 struct crypto_async_request *request)
127 struct cryptd_cpu_queue *cpu_queue;
131 cpu_queue = this_cpu_ptr(queue->cpu_queue);
132 err = crypto_enqueue_request(&cpu_queue->queue, request);
134 refcnt = crypto_tfm_ctx(request->tfm);
139 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
141 if (!atomic_read(refcnt))
152 /* Called in workqueue context, do one real cryption work (via
153 * req->complete) and reschedule itself if there are more work to
155 static void cryptd_queue_worker(struct work_struct *work)
157 struct cryptd_cpu_queue *cpu_queue;
158 struct crypto_async_request *req, *backlog;
160 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
162 * Only handle one request at a time to avoid hogging crypto workqueue.
163 * preempt_disable/enable is used to prevent being preempted by
164 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
165 * cryptd_enqueue_request() being accessed from software interrupts.
169 backlog = crypto_get_backlog(&cpu_queue->queue);
170 req = crypto_dequeue_request(&cpu_queue->queue);
178 backlog->complete(backlog, -EINPROGRESS);
179 req->complete(req, 0);
181 if (cpu_queue->queue.qlen)
182 queue_work(kcrypto_wq, &cpu_queue->work);
185 static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
187 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
188 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
192 static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
195 struct crypto_attr_type *algt;
197 algt = crypto_get_attr_type(tb);
201 *type |= algt->type & CRYPTO_ALG_INTERNAL;
202 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
205 static int cryptd_init_instance(struct crypto_instance *inst,
206 struct crypto_alg *alg)
208 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
210 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
211 return -ENAMETOOLONG;
213 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
215 inst->alg.cra_priority = alg->cra_priority + 50;
216 inst->alg.cra_blocksize = alg->cra_blocksize;
217 inst->alg.cra_alignmask = alg->cra_alignmask;
222 static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
226 struct crypto_instance *inst;
229 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
231 return ERR_PTR(-ENOMEM);
233 inst = (void *)(p + head);
235 err = cryptd_init_instance(inst, alg);
248 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
249 const u8 *key, unsigned int keylen)
251 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
252 struct crypto_sync_skcipher *child = ctx->child;
255 crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
256 crypto_sync_skcipher_set_flags(child,
257 crypto_skcipher_get_flags(parent) &
258 CRYPTO_TFM_REQ_MASK);
259 err = crypto_sync_skcipher_setkey(child, key, keylen);
260 crypto_skcipher_set_flags(parent,
261 crypto_sync_skcipher_get_flags(child) &
262 CRYPTO_TFM_RES_MASK);
266 static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
268 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
269 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
270 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
271 int refcnt = atomic_read(&ctx->refcnt);
274 rctx->complete(&req->base, err);
277 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
278 crypto_free_skcipher(tfm);
281 static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
284 struct skcipher_request *req = skcipher_request_cast(base);
285 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
286 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
287 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
288 struct crypto_sync_skcipher *child = ctx->child;
289 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
291 if (unlikely(err == -EINPROGRESS))
294 skcipher_request_set_sync_tfm(subreq, child);
295 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
297 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
300 err = crypto_skcipher_encrypt(subreq);
301 skcipher_request_zero(subreq);
303 req->base.complete = rctx->complete;
306 cryptd_skcipher_complete(req, err);
309 static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
312 struct skcipher_request *req = skcipher_request_cast(base);
313 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
314 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
315 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
316 struct crypto_sync_skcipher *child = ctx->child;
317 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
319 if (unlikely(err == -EINPROGRESS))
322 skcipher_request_set_sync_tfm(subreq, child);
323 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
325 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
328 err = crypto_skcipher_decrypt(subreq);
329 skcipher_request_zero(subreq);
331 req->base.complete = rctx->complete;
334 cryptd_skcipher_complete(req, err);
337 static int cryptd_skcipher_enqueue(struct skcipher_request *req,
338 crypto_completion_t compl)
340 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
341 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
342 struct cryptd_queue *queue;
344 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
345 rctx->complete = req->base.complete;
346 req->base.complete = compl;
348 return cryptd_enqueue_request(queue, &req->base);
351 static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
353 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
356 static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
358 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
361 static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
363 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
364 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
365 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
366 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
367 struct crypto_skcipher *cipher;
369 cipher = crypto_spawn_skcipher(spawn);
371 return PTR_ERR(cipher);
373 ctx->child = (struct crypto_sync_skcipher *)cipher;
374 crypto_skcipher_set_reqsize(
375 tfm, sizeof(struct cryptd_skcipher_request_ctx));
379 static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
381 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
383 crypto_free_sync_skcipher(ctx->child);
386 static void cryptd_skcipher_free(struct skcipher_instance *inst)
388 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
390 crypto_drop_skcipher(&ctx->spawn);
393 static int cryptd_create_skcipher(struct crypto_template *tmpl,
395 struct cryptd_queue *queue)
397 struct skcipherd_instance_ctx *ctx;
398 struct skcipher_instance *inst;
399 struct skcipher_alg *alg;
406 mask = CRYPTO_ALG_ASYNC;
408 cryptd_check_internal(tb, &type, &mask);
410 name = crypto_attr_alg_name(tb[1]);
412 return PTR_ERR(name);
414 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
418 ctx = skcipher_instance_ctx(inst);
421 crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
422 err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
426 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
427 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
429 goto out_drop_skcipher;
431 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
432 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
434 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
435 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
436 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
437 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
439 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
441 inst->alg.init = cryptd_skcipher_init_tfm;
442 inst->alg.exit = cryptd_skcipher_exit_tfm;
444 inst->alg.setkey = cryptd_skcipher_setkey;
445 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
446 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
448 inst->free = cryptd_skcipher_free;
450 err = skcipher_register_instance(tmpl, inst);
453 crypto_drop_skcipher(&ctx->spawn);
460 static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
462 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
463 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
464 struct crypto_shash_spawn *spawn = &ictx->spawn;
465 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
466 struct crypto_shash *hash;
468 hash = crypto_spawn_shash(spawn);
470 return PTR_ERR(hash);
473 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
474 sizeof(struct cryptd_hash_request_ctx) +
475 crypto_shash_descsize(hash));
479 static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
481 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
483 crypto_free_shash(ctx->child);
486 static int cryptd_hash_setkey(struct crypto_ahash *parent,
487 const u8 *key, unsigned int keylen)
489 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
490 struct crypto_shash *child = ctx->child;
493 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
494 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
495 CRYPTO_TFM_REQ_MASK);
496 err = crypto_shash_setkey(child, key, keylen);
497 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
498 CRYPTO_TFM_RES_MASK);
502 static int cryptd_hash_enqueue(struct ahash_request *req,
503 crypto_completion_t compl)
505 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
506 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
507 struct cryptd_queue *queue =
508 cryptd_get_queue(crypto_ahash_tfm(tfm));
510 rctx->complete = req->base.complete;
511 req->base.complete = compl;
513 return cryptd_enqueue_request(queue, &req->base);
516 static void cryptd_hash_complete(struct ahash_request *req, int err)
518 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
519 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
520 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
521 int refcnt = atomic_read(&ctx->refcnt);
524 rctx->complete(&req->base, err);
527 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
528 crypto_free_ahash(tfm);
531 static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
533 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
534 struct crypto_shash *child = ctx->child;
535 struct ahash_request *req = ahash_request_cast(req_async);
536 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
537 struct shash_desc *desc = &rctx->desc;
539 if (unlikely(err == -EINPROGRESS))
544 err = crypto_shash_init(desc);
546 req->base.complete = rctx->complete;
549 cryptd_hash_complete(req, err);
552 static int cryptd_hash_init_enqueue(struct ahash_request *req)
554 return cryptd_hash_enqueue(req, cryptd_hash_init);
557 static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
559 struct ahash_request *req = ahash_request_cast(req_async);
560 struct cryptd_hash_request_ctx *rctx;
562 rctx = ahash_request_ctx(req);
564 if (unlikely(err == -EINPROGRESS))
567 err = shash_ahash_update(req, &rctx->desc);
569 req->base.complete = rctx->complete;
572 cryptd_hash_complete(req, err);
575 static int cryptd_hash_update_enqueue(struct ahash_request *req)
577 return cryptd_hash_enqueue(req, cryptd_hash_update);
580 static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
582 struct ahash_request *req = ahash_request_cast(req_async);
583 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
585 if (unlikely(err == -EINPROGRESS))
588 err = crypto_shash_final(&rctx->desc, req->result);
590 req->base.complete = rctx->complete;
593 cryptd_hash_complete(req, err);
596 static int cryptd_hash_final_enqueue(struct ahash_request *req)
598 return cryptd_hash_enqueue(req, cryptd_hash_final);
601 static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
603 struct ahash_request *req = ahash_request_cast(req_async);
604 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
606 if (unlikely(err == -EINPROGRESS))
609 err = shash_ahash_finup(req, &rctx->desc);
611 req->base.complete = rctx->complete;
614 cryptd_hash_complete(req, err);
617 static int cryptd_hash_finup_enqueue(struct ahash_request *req)
619 return cryptd_hash_enqueue(req, cryptd_hash_finup);
622 static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
624 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
625 struct crypto_shash *child = ctx->child;
626 struct ahash_request *req = ahash_request_cast(req_async);
627 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
628 struct shash_desc *desc = &rctx->desc;
630 if (unlikely(err == -EINPROGRESS))
635 err = shash_ahash_digest(req, desc);
637 req->base.complete = rctx->complete;
640 cryptd_hash_complete(req, err);
643 static int cryptd_hash_digest_enqueue(struct ahash_request *req)
645 return cryptd_hash_enqueue(req, cryptd_hash_digest);
648 static int cryptd_hash_export(struct ahash_request *req, void *out)
650 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
652 return crypto_shash_export(&rctx->desc, out);
655 static int cryptd_hash_import(struct ahash_request *req, const void *in)
657 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
658 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
659 struct shash_desc *desc = cryptd_shash_desc(req);
661 desc->tfm = ctx->child;
663 return crypto_shash_import(desc, in);
666 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
667 struct cryptd_queue *queue)
669 struct hashd_instance_ctx *ctx;
670 struct ahash_instance *inst;
671 struct shash_alg *salg;
672 struct crypto_alg *alg;
677 cryptd_check_internal(tb, &type, &mask);
679 salg = shash_attr_alg(tb[1], type, mask);
681 return PTR_ERR(salg);
684 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
690 ctx = ahash_instance_ctx(inst);
693 err = crypto_init_shash_spawn(&ctx->spawn, salg,
694 ahash_crypto_instance(inst));
698 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
699 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
700 CRYPTO_ALG_OPTIONAL_KEY));
702 inst->alg.halg.digestsize = salg->digestsize;
703 inst->alg.halg.statesize = salg->statesize;
704 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
706 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
707 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
709 inst->alg.init = cryptd_hash_init_enqueue;
710 inst->alg.update = cryptd_hash_update_enqueue;
711 inst->alg.final = cryptd_hash_final_enqueue;
712 inst->alg.finup = cryptd_hash_finup_enqueue;
713 inst->alg.export = cryptd_hash_export;
714 inst->alg.import = cryptd_hash_import;
715 if (crypto_shash_alg_has_setkey(salg))
716 inst->alg.setkey = cryptd_hash_setkey;
717 inst->alg.digest = cryptd_hash_digest_enqueue;
719 err = ahash_register_instance(tmpl, inst);
721 crypto_drop_shash(&ctx->spawn);
731 static int cryptd_aead_setkey(struct crypto_aead *parent,
732 const u8 *key, unsigned int keylen)
734 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
735 struct crypto_aead *child = ctx->child;
737 return crypto_aead_setkey(child, key, keylen);
740 static int cryptd_aead_setauthsize(struct crypto_aead *parent,
741 unsigned int authsize)
743 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
744 struct crypto_aead *child = ctx->child;
746 return crypto_aead_setauthsize(child, authsize);
749 static void cryptd_aead_crypt(struct aead_request *req,
750 struct crypto_aead *child,
752 int (*crypt)(struct aead_request *req))
754 struct cryptd_aead_request_ctx *rctx;
755 struct cryptd_aead_ctx *ctx;
756 crypto_completion_t compl;
757 struct crypto_aead *tfm;
760 rctx = aead_request_ctx(req);
761 compl = rctx->complete;
763 tfm = crypto_aead_reqtfm(req);
765 if (unlikely(err == -EINPROGRESS))
767 aead_request_set_tfm(req, child);
771 ctx = crypto_aead_ctx(tfm);
772 refcnt = atomic_read(&ctx->refcnt);
775 compl(&req->base, err);
778 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
779 crypto_free_aead(tfm);
782 static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
784 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
785 struct crypto_aead *child = ctx->child;
786 struct aead_request *req;
788 req = container_of(areq, struct aead_request, base);
789 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
792 static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
794 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
795 struct crypto_aead *child = ctx->child;
796 struct aead_request *req;
798 req = container_of(areq, struct aead_request, base);
799 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
802 static int cryptd_aead_enqueue(struct aead_request *req,
803 crypto_completion_t compl)
805 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
806 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
807 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
809 rctx->complete = req->base.complete;
810 req->base.complete = compl;
811 return cryptd_enqueue_request(queue, &req->base);
814 static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
816 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
819 static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
821 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
824 static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
826 struct aead_instance *inst = aead_alg_instance(tfm);
827 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
828 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
829 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
830 struct crypto_aead *cipher;
832 cipher = crypto_spawn_aead(spawn);
834 return PTR_ERR(cipher);
837 crypto_aead_set_reqsize(
838 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
839 crypto_aead_reqsize(cipher)));
843 static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
845 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
846 crypto_free_aead(ctx->child);
849 static int cryptd_create_aead(struct crypto_template *tmpl,
851 struct cryptd_queue *queue)
853 struct aead_instance_ctx *ctx;
854 struct aead_instance *inst;
855 struct aead_alg *alg;
858 u32 mask = CRYPTO_ALG_ASYNC;
861 cryptd_check_internal(tb, &type, &mask);
863 name = crypto_attr_alg_name(tb[1]);
865 return PTR_ERR(name);
867 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
871 ctx = aead_instance_ctx(inst);
874 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
875 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
879 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
880 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
884 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
885 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
886 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
888 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
889 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
891 inst->alg.init = cryptd_aead_init_tfm;
892 inst->alg.exit = cryptd_aead_exit_tfm;
893 inst->alg.setkey = cryptd_aead_setkey;
894 inst->alg.setauthsize = cryptd_aead_setauthsize;
895 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
896 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
898 err = aead_register_instance(tmpl, inst);
901 crypto_drop_aead(&ctx->aead_spawn);
908 static struct cryptd_queue queue;
910 static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
912 struct crypto_attr_type *algt;
914 algt = crypto_get_attr_type(tb);
916 return PTR_ERR(algt);
918 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
919 case CRYPTO_ALG_TYPE_BLKCIPHER:
920 return cryptd_create_skcipher(tmpl, tb, &queue);
921 case CRYPTO_ALG_TYPE_DIGEST:
922 return cryptd_create_hash(tmpl, tb, &queue);
923 case CRYPTO_ALG_TYPE_AEAD:
924 return cryptd_create_aead(tmpl, tb, &queue);
930 static void cryptd_free(struct crypto_instance *inst)
932 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
933 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
934 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
936 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
937 case CRYPTO_ALG_TYPE_AHASH:
938 crypto_drop_shash(&hctx->spawn);
939 kfree(ahash_instance(inst));
941 case CRYPTO_ALG_TYPE_AEAD:
942 crypto_drop_aead(&aead_ctx->aead_spawn);
943 kfree(aead_instance(inst));
946 crypto_drop_spawn(&ctx->spawn);
951 static struct crypto_template cryptd_tmpl = {
953 .create = cryptd_create,
955 .module = THIS_MODULE,
958 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
961 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
962 struct cryptd_skcipher_ctx *ctx;
963 struct crypto_skcipher *tfm;
965 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
966 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
967 return ERR_PTR(-EINVAL);
969 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
971 return ERR_CAST(tfm);
973 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
974 crypto_free_skcipher(tfm);
975 return ERR_PTR(-EINVAL);
978 ctx = crypto_skcipher_ctx(tfm);
979 atomic_set(&ctx->refcnt, 1);
981 return container_of(tfm, struct cryptd_skcipher, base);
983 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
985 struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
987 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
989 return &ctx->child->base;
991 EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
993 bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
995 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
997 return atomic_read(&ctx->refcnt) - 1;
999 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1001 void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1003 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1005 if (atomic_dec_and_test(&ctx->refcnt))
1006 crypto_free_skcipher(&tfm->base);
1008 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1010 struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1013 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1014 struct cryptd_hash_ctx *ctx;
1015 struct crypto_ahash *tfm;
1017 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1018 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1019 return ERR_PTR(-EINVAL);
1020 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1022 return ERR_CAST(tfm);
1023 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1024 crypto_free_ahash(tfm);
1025 return ERR_PTR(-EINVAL);
1028 ctx = crypto_ahash_ctx(tfm);
1029 atomic_set(&ctx->refcnt, 1);
1031 return __cryptd_ahash_cast(tfm);
1033 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1035 struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1037 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1041 EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1043 struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1045 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1048 EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1050 bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1052 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1054 return atomic_read(&ctx->refcnt) - 1;
1056 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1058 void cryptd_free_ahash(struct cryptd_ahash *tfm)
1060 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1062 if (atomic_dec_and_test(&ctx->refcnt))
1063 crypto_free_ahash(&tfm->base);
1065 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1067 struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1070 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1071 struct cryptd_aead_ctx *ctx;
1072 struct crypto_aead *tfm;
1074 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1075 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1076 return ERR_PTR(-EINVAL);
1077 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1079 return ERR_CAST(tfm);
1080 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1081 crypto_free_aead(tfm);
1082 return ERR_PTR(-EINVAL);
1085 ctx = crypto_aead_ctx(tfm);
1086 atomic_set(&ctx->refcnt, 1);
1088 return __cryptd_aead_cast(tfm);
1090 EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1092 struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1094 struct cryptd_aead_ctx *ctx;
1095 ctx = crypto_aead_ctx(&tfm->base);
1098 EXPORT_SYMBOL_GPL(cryptd_aead_child);
1100 bool cryptd_aead_queued(struct cryptd_aead *tfm)
1102 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1104 return atomic_read(&ctx->refcnt) - 1;
1106 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1108 void cryptd_free_aead(struct cryptd_aead *tfm)
1110 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1112 if (atomic_dec_and_test(&ctx->refcnt))
1113 crypto_free_aead(&tfm->base);
1115 EXPORT_SYMBOL_GPL(cryptd_free_aead);
1117 static int __init cryptd_init(void)
1121 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1125 err = crypto_register_template(&cryptd_tmpl);
1127 cryptd_fini_queue(&queue);
1132 static void __exit cryptd_exit(void)
1134 cryptd_fini_queue(&queue);
1135 crypto_unregister_template(&cryptd_tmpl);
1138 subsys_initcall(cryptd_init);
1139 module_exit(cryptd_exit);
1141 MODULE_LICENSE("GPL");
1142 MODULE_DESCRIPTION("Software async crypto daemon");
1143 MODULE_ALIAS_CRYPTO("cryptd");