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 <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
);
394 static int cryptd_create_skcipher(struct crypto_template
*tmpl
,
396 struct cryptd_queue
*queue
)
398 struct skcipherd_instance_ctx
*ctx
;
399 struct skcipher_instance
*inst
;
400 struct skcipher_alg
*alg
;
407 mask
= CRYPTO_ALG_ASYNC
;
409 cryptd_check_internal(tb
, &type
, &mask
);
411 name
= crypto_attr_alg_name(tb
[1]);
413 return PTR_ERR(name
);
415 inst
= kzalloc(sizeof(*inst
) + sizeof(*ctx
), GFP_KERNEL
);
419 ctx
= skcipher_instance_ctx(inst
);
422 crypto_set_skcipher_spawn(&ctx
->spawn
, skcipher_crypto_instance(inst
));
423 err
= crypto_grab_skcipher(&ctx
->spawn
, name
, type
, mask
);
427 alg
= crypto_spawn_skcipher_alg(&ctx
->spawn
);
428 err
= cryptd_init_instance(skcipher_crypto_instance(inst
), &alg
->base
);
430 goto out_drop_skcipher
;
432 inst
->alg
.base
.cra_flags
= CRYPTO_ALG_ASYNC
|
433 (alg
->base
.cra_flags
& CRYPTO_ALG_INTERNAL
);
435 inst
->alg
.ivsize
= crypto_skcipher_alg_ivsize(alg
);
436 inst
->alg
.chunksize
= crypto_skcipher_alg_chunksize(alg
);
437 inst
->alg
.min_keysize
= crypto_skcipher_alg_min_keysize(alg
);
438 inst
->alg
.max_keysize
= crypto_skcipher_alg_max_keysize(alg
);
440 inst
->alg
.base
.cra_ctxsize
= sizeof(struct cryptd_skcipher_ctx
);
442 inst
->alg
.init
= cryptd_skcipher_init_tfm
;
443 inst
->alg
.exit
= cryptd_skcipher_exit_tfm
;
445 inst
->alg
.setkey
= cryptd_skcipher_setkey
;
446 inst
->alg
.encrypt
= cryptd_skcipher_encrypt_enqueue
;
447 inst
->alg
.decrypt
= cryptd_skcipher_decrypt_enqueue
;
449 inst
->free
= cryptd_skcipher_free
;
451 err
= skcipher_register_instance(tmpl
, inst
);
454 crypto_drop_skcipher(&ctx
->spawn
);
461 static int cryptd_hash_init_tfm(struct crypto_tfm
*tfm
)
463 struct crypto_instance
*inst
= crypto_tfm_alg_instance(tfm
);
464 struct hashd_instance_ctx
*ictx
= crypto_instance_ctx(inst
);
465 struct crypto_shash_spawn
*spawn
= &ictx
->spawn
;
466 struct cryptd_hash_ctx
*ctx
= crypto_tfm_ctx(tfm
);
467 struct crypto_shash
*hash
;
469 hash
= crypto_spawn_shash(spawn
);
471 return PTR_ERR(hash
);
474 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm
),
475 sizeof(struct cryptd_hash_request_ctx
) +
476 crypto_shash_descsize(hash
));
480 static void cryptd_hash_exit_tfm(struct crypto_tfm
*tfm
)
482 struct cryptd_hash_ctx
*ctx
= crypto_tfm_ctx(tfm
);
484 crypto_free_shash(ctx
->child
);
487 static int cryptd_hash_setkey(struct crypto_ahash
*parent
,
488 const u8
*key
, unsigned int keylen
)
490 struct cryptd_hash_ctx
*ctx
= crypto_ahash_ctx(parent
);
491 struct crypto_shash
*child
= ctx
->child
;
494 crypto_shash_clear_flags(child
, CRYPTO_TFM_REQ_MASK
);
495 crypto_shash_set_flags(child
, crypto_ahash_get_flags(parent
) &
496 CRYPTO_TFM_REQ_MASK
);
497 err
= crypto_shash_setkey(child
, key
, keylen
);
498 crypto_ahash_set_flags(parent
, crypto_shash_get_flags(child
) &
499 CRYPTO_TFM_RES_MASK
);
503 static int cryptd_hash_enqueue(struct ahash_request
*req
,
504 crypto_completion_t
compl)
506 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
507 struct crypto_ahash
*tfm
= crypto_ahash_reqtfm(req
);
508 struct cryptd_queue
*queue
=
509 cryptd_get_queue(crypto_ahash_tfm(tfm
));
511 rctx
->complete
= req
->base
.complete
;
512 req
->base
.complete
= compl;
514 return cryptd_enqueue_request(queue
, &req
->base
);
517 static void cryptd_hash_complete(struct ahash_request
*req
, int err
)
519 struct crypto_ahash
*tfm
= crypto_ahash_reqtfm(req
);
520 struct cryptd_hash_ctx
*ctx
= crypto_ahash_ctx(tfm
);
521 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
522 int refcnt
= atomic_read(&ctx
->refcnt
);
525 rctx
->complete(&req
->base
, err
);
528 if (err
!= -EINPROGRESS
&& refcnt
&& atomic_dec_and_test(&ctx
->refcnt
))
529 crypto_free_ahash(tfm
);
532 static void cryptd_hash_init(struct crypto_async_request
*req_async
, int err
)
534 struct cryptd_hash_ctx
*ctx
= crypto_tfm_ctx(req_async
->tfm
);
535 struct crypto_shash
*child
= ctx
->child
;
536 struct ahash_request
*req
= ahash_request_cast(req_async
);
537 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
538 struct shash_desc
*desc
= &rctx
->desc
;
540 if (unlikely(err
== -EINPROGRESS
))
545 err
= crypto_shash_init(desc
);
547 req
->base
.complete
= rctx
->complete
;
550 cryptd_hash_complete(req
, err
);
553 static int cryptd_hash_init_enqueue(struct ahash_request
*req
)
555 return cryptd_hash_enqueue(req
, cryptd_hash_init
);
558 static void cryptd_hash_update(struct crypto_async_request
*req_async
, int err
)
560 struct ahash_request
*req
= ahash_request_cast(req_async
);
561 struct cryptd_hash_request_ctx
*rctx
;
563 rctx
= ahash_request_ctx(req
);
565 if (unlikely(err
== -EINPROGRESS
))
568 err
= shash_ahash_update(req
, &rctx
->desc
);
570 req
->base
.complete
= rctx
->complete
;
573 cryptd_hash_complete(req
, err
);
576 static int cryptd_hash_update_enqueue(struct ahash_request
*req
)
578 return cryptd_hash_enqueue(req
, cryptd_hash_update
);
581 static void cryptd_hash_final(struct crypto_async_request
*req_async
, int err
)
583 struct ahash_request
*req
= ahash_request_cast(req_async
);
584 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
586 if (unlikely(err
== -EINPROGRESS
))
589 err
= crypto_shash_final(&rctx
->desc
, req
->result
);
591 req
->base
.complete
= rctx
->complete
;
594 cryptd_hash_complete(req
, err
);
597 static int cryptd_hash_final_enqueue(struct ahash_request
*req
)
599 return cryptd_hash_enqueue(req
, cryptd_hash_final
);
602 static void cryptd_hash_finup(struct crypto_async_request
*req_async
, int err
)
604 struct ahash_request
*req
= ahash_request_cast(req_async
);
605 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
607 if (unlikely(err
== -EINPROGRESS
))
610 err
= shash_ahash_finup(req
, &rctx
->desc
);
612 req
->base
.complete
= rctx
->complete
;
615 cryptd_hash_complete(req
, err
);
618 static int cryptd_hash_finup_enqueue(struct ahash_request
*req
)
620 return cryptd_hash_enqueue(req
, cryptd_hash_finup
);
623 static void cryptd_hash_digest(struct crypto_async_request
*req_async
, int err
)
625 struct cryptd_hash_ctx
*ctx
= crypto_tfm_ctx(req_async
->tfm
);
626 struct crypto_shash
*child
= ctx
->child
;
627 struct ahash_request
*req
= ahash_request_cast(req_async
);
628 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
629 struct shash_desc
*desc
= &rctx
->desc
;
631 if (unlikely(err
== -EINPROGRESS
))
636 err
= shash_ahash_digest(req
, desc
);
638 req
->base
.complete
= rctx
->complete
;
641 cryptd_hash_complete(req
, err
);
644 static int cryptd_hash_digest_enqueue(struct ahash_request
*req
)
646 return cryptd_hash_enqueue(req
, cryptd_hash_digest
);
649 static int cryptd_hash_export(struct ahash_request
*req
, void *out
)
651 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
653 return crypto_shash_export(&rctx
->desc
, out
);
656 static int cryptd_hash_import(struct ahash_request
*req
, const void *in
)
658 struct crypto_ahash
*tfm
= crypto_ahash_reqtfm(req
);
659 struct cryptd_hash_ctx
*ctx
= crypto_ahash_ctx(tfm
);
660 struct shash_desc
*desc
= cryptd_shash_desc(req
);
662 desc
->tfm
= ctx
->child
;
664 return crypto_shash_import(desc
, in
);
667 static int cryptd_create_hash(struct crypto_template
*tmpl
, struct rtattr
**tb
,
668 struct cryptd_queue
*queue
)
670 struct hashd_instance_ctx
*ctx
;
671 struct ahash_instance
*inst
;
672 struct shash_alg
*salg
;
673 struct crypto_alg
*alg
;
678 cryptd_check_internal(tb
, &type
, &mask
);
680 salg
= shash_attr_alg(tb
[1], type
, mask
);
682 return PTR_ERR(salg
);
685 inst
= cryptd_alloc_instance(alg
, ahash_instance_headroom(),
691 ctx
= ahash_instance_ctx(inst
);
694 err
= crypto_init_shash_spawn(&ctx
->spawn
, salg
,
695 ahash_crypto_instance(inst
));
699 inst
->alg
.halg
.base
.cra_flags
= CRYPTO_ALG_ASYNC
|
700 (alg
->cra_flags
& (CRYPTO_ALG_INTERNAL
|
701 CRYPTO_ALG_OPTIONAL_KEY
));
703 inst
->alg
.halg
.digestsize
= salg
->digestsize
;
704 inst
->alg
.halg
.statesize
= salg
->statesize
;
705 inst
->alg
.halg
.base
.cra_ctxsize
= sizeof(struct cryptd_hash_ctx
);
707 inst
->alg
.halg
.base
.cra_init
= cryptd_hash_init_tfm
;
708 inst
->alg
.halg
.base
.cra_exit
= cryptd_hash_exit_tfm
;
710 inst
->alg
.init
= cryptd_hash_init_enqueue
;
711 inst
->alg
.update
= cryptd_hash_update_enqueue
;
712 inst
->alg
.final
= cryptd_hash_final_enqueue
;
713 inst
->alg
.finup
= cryptd_hash_finup_enqueue
;
714 inst
->alg
.export
= cryptd_hash_export
;
715 inst
->alg
.import
= cryptd_hash_import
;
716 if (crypto_shash_alg_has_setkey(salg
))
717 inst
->alg
.setkey
= cryptd_hash_setkey
;
718 inst
->alg
.digest
= cryptd_hash_digest_enqueue
;
720 err
= ahash_register_instance(tmpl
, inst
);
722 crypto_drop_shash(&ctx
->spawn
);
732 static int cryptd_aead_setkey(struct crypto_aead
*parent
,
733 const u8
*key
, unsigned int keylen
)
735 struct cryptd_aead_ctx
*ctx
= crypto_aead_ctx(parent
);
736 struct crypto_aead
*child
= ctx
->child
;
738 return crypto_aead_setkey(child
, key
, keylen
);
741 static int cryptd_aead_setauthsize(struct crypto_aead
*parent
,
742 unsigned int authsize
)
744 struct cryptd_aead_ctx
*ctx
= crypto_aead_ctx(parent
);
745 struct crypto_aead
*child
= ctx
->child
;
747 return crypto_aead_setauthsize(child
, authsize
);
750 static void cryptd_aead_crypt(struct aead_request
*req
,
751 struct crypto_aead
*child
,
753 int (*crypt
)(struct aead_request
*req
))
755 struct cryptd_aead_request_ctx
*rctx
;
756 struct cryptd_aead_ctx
*ctx
;
757 crypto_completion_t
compl;
758 struct crypto_aead
*tfm
;
761 rctx
= aead_request_ctx(req
);
762 compl = rctx
->complete
;
764 tfm
= crypto_aead_reqtfm(req
);
766 if (unlikely(err
== -EINPROGRESS
))
768 aead_request_set_tfm(req
, child
);
772 ctx
= crypto_aead_ctx(tfm
);
773 refcnt
= atomic_read(&ctx
->refcnt
);
776 compl(&req
->base
, err
);
779 if (err
!= -EINPROGRESS
&& refcnt
&& atomic_dec_and_test(&ctx
->refcnt
))
780 crypto_free_aead(tfm
);
783 static void cryptd_aead_encrypt(struct crypto_async_request
*areq
, int err
)
785 struct cryptd_aead_ctx
*ctx
= crypto_tfm_ctx(areq
->tfm
);
786 struct crypto_aead
*child
= ctx
->child
;
787 struct aead_request
*req
;
789 req
= container_of(areq
, struct aead_request
, base
);
790 cryptd_aead_crypt(req
, child
, err
, crypto_aead_alg(child
)->encrypt
);
793 static void cryptd_aead_decrypt(struct crypto_async_request
*areq
, int err
)
795 struct cryptd_aead_ctx
*ctx
= crypto_tfm_ctx(areq
->tfm
);
796 struct crypto_aead
*child
= ctx
->child
;
797 struct aead_request
*req
;
799 req
= container_of(areq
, struct aead_request
, base
);
800 cryptd_aead_crypt(req
, child
, err
, crypto_aead_alg(child
)->decrypt
);
803 static int cryptd_aead_enqueue(struct aead_request
*req
,
804 crypto_completion_t
compl)
806 struct cryptd_aead_request_ctx
*rctx
= aead_request_ctx(req
);
807 struct crypto_aead
*tfm
= crypto_aead_reqtfm(req
);
808 struct cryptd_queue
*queue
= cryptd_get_queue(crypto_aead_tfm(tfm
));
810 rctx
->complete
= req
->base
.complete
;
811 req
->base
.complete
= compl;
812 return cryptd_enqueue_request(queue
, &req
->base
);
815 static int cryptd_aead_encrypt_enqueue(struct aead_request
*req
)
817 return cryptd_aead_enqueue(req
, cryptd_aead_encrypt
);
820 static int cryptd_aead_decrypt_enqueue(struct aead_request
*req
)
822 return cryptd_aead_enqueue(req
, cryptd_aead_decrypt
);
825 static int cryptd_aead_init_tfm(struct crypto_aead
*tfm
)
827 struct aead_instance
*inst
= aead_alg_instance(tfm
);
828 struct aead_instance_ctx
*ictx
= aead_instance_ctx(inst
);
829 struct crypto_aead_spawn
*spawn
= &ictx
->aead_spawn
;
830 struct cryptd_aead_ctx
*ctx
= crypto_aead_ctx(tfm
);
831 struct crypto_aead
*cipher
;
833 cipher
= crypto_spawn_aead(spawn
);
835 return PTR_ERR(cipher
);
838 crypto_aead_set_reqsize(
839 tfm
, max((unsigned)sizeof(struct cryptd_aead_request_ctx
),
840 crypto_aead_reqsize(cipher
)));
844 static void cryptd_aead_exit_tfm(struct crypto_aead
*tfm
)
846 struct cryptd_aead_ctx
*ctx
= crypto_aead_ctx(tfm
);
847 crypto_free_aead(ctx
->child
);
850 static int cryptd_create_aead(struct crypto_template
*tmpl
,
852 struct cryptd_queue
*queue
)
854 struct aead_instance_ctx
*ctx
;
855 struct aead_instance
*inst
;
856 struct aead_alg
*alg
;
859 u32 mask
= CRYPTO_ALG_ASYNC
;
862 cryptd_check_internal(tb
, &type
, &mask
);
864 name
= crypto_attr_alg_name(tb
[1]);
866 return PTR_ERR(name
);
868 inst
= kzalloc(sizeof(*inst
) + sizeof(*ctx
), GFP_KERNEL
);
872 ctx
= aead_instance_ctx(inst
);
875 crypto_set_aead_spawn(&ctx
->aead_spawn
, aead_crypto_instance(inst
));
876 err
= crypto_grab_aead(&ctx
->aead_spawn
, name
, type
, mask
);
880 alg
= crypto_spawn_aead_alg(&ctx
->aead_spawn
);
881 err
= cryptd_init_instance(aead_crypto_instance(inst
), &alg
->base
);
885 inst
->alg
.base
.cra_flags
= CRYPTO_ALG_ASYNC
|
886 (alg
->base
.cra_flags
& CRYPTO_ALG_INTERNAL
);
887 inst
->alg
.base
.cra_ctxsize
= sizeof(struct cryptd_aead_ctx
);
889 inst
->alg
.ivsize
= crypto_aead_alg_ivsize(alg
);
890 inst
->alg
.maxauthsize
= crypto_aead_alg_maxauthsize(alg
);
892 inst
->alg
.init
= cryptd_aead_init_tfm
;
893 inst
->alg
.exit
= cryptd_aead_exit_tfm
;
894 inst
->alg
.setkey
= cryptd_aead_setkey
;
895 inst
->alg
.setauthsize
= cryptd_aead_setauthsize
;
896 inst
->alg
.encrypt
= cryptd_aead_encrypt_enqueue
;
897 inst
->alg
.decrypt
= cryptd_aead_decrypt_enqueue
;
899 err
= aead_register_instance(tmpl
, inst
);
902 crypto_drop_aead(&ctx
->aead_spawn
);
909 static struct cryptd_queue queue
;
911 static int cryptd_create(struct crypto_template
*tmpl
, struct rtattr
**tb
)
913 struct crypto_attr_type
*algt
;
915 algt
= crypto_get_attr_type(tb
);
917 return PTR_ERR(algt
);
919 switch (algt
->type
& algt
->mask
& CRYPTO_ALG_TYPE_MASK
) {
920 case CRYPTO_ALG_TYPE_BLKCIPHER
:
921 return cryptd_create_skcipher(tmpl
, tb
, &queue
);
922 case CRYPTO_ALG_TYPE_DIGEST
:
923 return cryptd_create_hash(tmpl
, tb
, &queue
);
924 case CRYPTO_ALG_TYPE_AEAD
:
925 return cryptd_create_aead(tmpl
, tb
, &queue
);
931 static void cryptd_free(struct crypto_instance
*inst
)
933 struct cryptd_instance_ctx
*ctx
= crypto_instance_ctx(inst
);
934 struct hashd_instance_ctx
*hctx
= crypto_instance_ctx(inst
);
935 struct aead_instance_ctx
*aead_ctx
= crypto_instance_ctx(inst
);
937 switch (inst
->alg
.cra_flags
& CRYPTO_ALG_TYPE_MASK
) {
938 case CRYPTO_ALG_TYPE_AHASH
:
939 crypto_drop_shash(&hctx
->spawn
);
940 kfree(ahash_instance(inst
));
942 case CRYPTO_ALG_TYPE_AEAD
:
943 crypto_drop_aead(&aead_ctx
->aead_spawn
);
944 kfree(aead_instance(inst
));
947 crypto_drop_spawn(&ctx
->spawn
);
952 static struct crypto_template cryptd_tmpl
= {
954 .create
= cryptd_create
,
956 .module
= THIS_MODULE
,
959 struct cryptd_skcipher
*cryptd_alloc_skcipher(const char *alg_name
,
962 char cryptd_alg_name
[CRYPTO_MAX_ALG_NAME
];
963 struct cryptd_skcipher_ctx
*ctx
;
964 struct crypto_skcipher
*tfm
;
966 if (snprintf(cryptd_alg_name
, CRYPTO_MAX_ALG_NAME
,
967 "cryptd(%s)", alg_name
) >= CRYPTO_MAX_ALG_NAME
)
968 return ERR_PTR(-EINVAL
);
970 tfm
= crypto_alloc_skcipher(cryptd_alg_name
, type
, mask
);
972 return ERR_CAST(tfm
);
974 if (tfm
->base
.__crt_alg
->cra_module
!= THIS_MODULE
) {
975 crypto_free_skcipher(tfm
);
976 return ERR_PTR(-EINVAL
);
979 ctx
= crypto_skcipher_ctx(tfm
);
980 atomic_set(&ctx
->refcnt
, 1);
982 return container_of(tfm
, struct cryptd_skcipher
, base
);
984 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher
);
986 struct crypto_skcipher
*cryptd_skcipher_child(struct cryptd_skcipher
*tfm
)
988 struct cryptd_skcipher_ctx
*ctx
= crypto_skcipher_ctx(&tfm
->base
);
990 return &ctx
->child
->base
;
992 EXPORT_SYMBOL_GPL(cryptd_skcipher_child
);
994 bool cryptd_skcipher_queued(struct cryptd_skcipher
*tfm
)
996 struct cryptd_skcipher_ctx
*ctx
= crypto_skcipher_ctx(&tfm
->base
);
998 return atomic_read(&ctx
->refcnt
) - 1;
1000 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued
);
1002 void cryptd_free_skcipher(struct cryptd_skcipher
*tfm
)
1004 struct cryptd_skcipher_ctx
*ctx
= crypto_skcipher_ctx(&tfm
->base
);
1006 if (atomic_dec_and_test(&ctx
->refcnt
))
1007 crypto_free_skcipher(&tfm
->base
);
1009 EXPORT_SYMBOL_GPL(cryptd_free_skcipher
);
1011 struct cryptd_ahash
*cryptd_alloc_ahash(const char *alg_name
,
1014 char cryptd_alg_name
[CRYPTO_MAX_ALG_NAME
];
1015 struct cryptd_hash_ctx
*ctx
;
1016 struct crypto_ahash
*tfm
;
1018 if (snprintf(cryptd_alg_name
, CRYPTO_MAX_ALG_NAME
,
1019 "cryptd(%s)", alg_name
) >= CRYPTO_MAX_ALG_NAME
)
1020 return ERR_PTR(-EINVAL
);
1021 tfm
= crypto_alloc_ahash(cryptd_alg_name
, type
, mask
);
1023 return ERR_CAST(tfm
);
1024 if (tfm
->base
.__crt_alg
->cra_module
!= THIS_MODULE
) {
1025 crypto_free_ahash(tfm
);
1026 return ERR_PTR(-EINVAL
);
1029 ctx
= crypto_ahash_ctx(tfm
);
1030 atomic_set(&ctx
->refcnt
, 1);
1032 return __cryptd_ahash_cast(tfm
);
1034 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash
);
1036 struct crypto_shash
*cryptd_ahash_child(struct cryptd_ahash
*tfm
)
1038 struct cryptd_hash_ctx
*ctx
= crypto_ahash_ctx(&tfm
->base
);
1042 EXPORT_SYMBOL_GPL(cryptd_ahash_child
);
1044 struct shash_desc
*cryptd_shash_desc(struct ahash_request
*req
)
1046 struct cryptd_hash_request_ctx
*rctx
= ahash_request_ctx(req
);
1049 EXPORT_SYMBOL_GPL(cryptd_shash_desc
);
1051 bool cryptd_ahash_queued(struct cryptd_ahash
*tfm
)
1053 struct cryptd_hash_ctx
*ctx
= crypto_ahash_ctx(&tfm
->base
);
1055 return atomic_read(&ctx
->refcnt
) - 1;
1057 EXPORT_SYMBOL_GPL(cryptd_ahash_queued
);
1059 void cryptd_free_ahash(struct cryptd_ahash
*tfm
)
1061 struct cryptd_hash_ctx
*ctx
= crypto_ahash_ctx(&tfm
->base
);
1063 if (atomic_dec_and_test(&ctx
->refcnt
))
1064 crypto_free_ahash(&tfm
->base
);
1066 EXPORT_SYMBOL_GPL(cryptd_free_ahash
);
1068 struct cryptd_aead
*cryptd_alloc_aead(const char *alg_name
,
1071 char cryptd_alg_name
[CRYPTO_MAX_ALG_NAME
];
1072 struct cryptd_aead_ctx
*ctx
;
1073 struct crypto_aead
*tfm
;
1075 if (snprintf(cryptd_alg_name
, CRYPTO_MAX_ALG_NAME
,
1076 "cryptd(%s)", alg_name
) >= CRYPTO_MAX_ALG_NAME
)
1077 return ERR_PTR(-EINVAL
);
1078 tfm
= crypto_alloc_aead(cryptd_alg_name
, type
, mask
);
1080 return ERR_CAST(tfm
);
1081 if (tfm
->base
.__crt_alg
->cra_module
!= THIS_MODULE
) {
1082 crypto_free_aead(tfm
);
1083 return ERR_PTR(-EINVAL
);
1086 ctx
= crypto_aead_ctx(tfm
);
1087 atomic_set(&ctx
->refcnt
, 1);
1089 return __cryptd_aead_cast(tfm
);
1091 EXPORT_SYMBOL_GPL(cryptd_alloc_aead
);
1093 struct crypto_aead
*cryptd_aead_child(struct cryptd_aead
*tfm
)
1095 struct cryptd_aead_ctx
*ctx
;
1096 ctx
= crypto_aead_ctx(&tfm
->base
);
1099 EXPORT_SYMBOL_GPL(cryptd_aead_child
);
1101 bool cryptd_aead_queued(struct cryptd_aead
*tfm
)
1103 struct cryptd_aead_ctx
*ctx
= crypto_aead_ctx(&tfm
->base
);
1105 return atomic_read(&ctx
->refcnt
) - 1;
1107 EXPORT_SYMBOL_GPL(cryptd_aead_queued
);
1109 void cryptd_free_aead(struct cryptd_aead
*tfm
)
1111 struct cryptd_aead_ctx
*ctx
= crypto_aead_ctx(&tfm
->base
);
1113 if (atomic_dec_and_test(&ctx
->refcnt
))
1114 crypto_free_aead(&tfm
->base
);
1116 EXPORT_SYMBOL_GPL(cryptd_free_aead
);
1118 static int __init
cryptd_init(void)
1122 err
= cryptd_init_queue(&queue
, cryptd_max_cpu_qlen
);
1126 err
= crypto_register_template(&cryptd_tmpl
);
1128 cryptd_fini_queue(&queue
);
1133 static void __exit
cryptd_exit(void)
1135 cryptd_fini_queue(&queue
);
1136 crypto_unregister_template(&cryptd_tmpl
);
1139 subsys_initcall(cryptd_init
);
1140 module_exit(cryptd_exit
);
1142 MODULE_LICENSE("GPL");
1143 MODULE_DESCRIPTION("Software async crypto daemon");
1144 MODULE_ALIAS_CRYPTO("cryptd");