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/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>
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;
43 * Protected by disabling BH to allow enqueueing from softinterrupt and
44 * dequeuing from kworker (cryptd_queue_worker()).
46 struct cryptd_cpu_queue __percpu *cpu_queue;
49 struct cryptd_instance_ctx {
50 struct crypto_spawn spawn;
51 struct cryptd_queue *queue;
54 struct skcipherd_instance_ctx {
55 struct crypto_skcipher_spawn spawn;
56 struct cryptd_queue *queue;
59 struct hashd_instance_ctx {
60 struct crypto_shash_spawn spawn;
61 struct cryptd_queue *queue;
64 struct aead_instance_ctx {
65 struct crypto_aead_spawn aead_spawn;
66 struct cryptd_queue *queue;
69 struct cryptd_skcipher_ctx {
71 struct crypto_skcipher *child;
74 struct cryptd_skcipher_request_ctx {
75 struct skcipher_request req;
78 struct cryptd_hash_ctx {
80 struct crypto_shash *child;
83 struct cryptd_hash_request_ctx {
84 crypto_completion_t complete;
86 struct shash_desc desc;
89 struct cryptd_aead_ctx {
91 struct crypto_aead *child;
94 struct cryptd_aead_request_ctx {
95 struct aead_request req;
98 static void cryptd_queue_worker(struct work_struct *work);
100 static int cryptd_init_queue(struct cryptd_queue *queue,
101 unsigned int max_cpu_qlen)
104 struct cryptd_cpu_queue *cpu_queue;
106 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
107 if (!queue->cpu_queue)
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);
114 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
118 static void cryptd_fini_queue(struct cryptd_queue *queue)
121 struct cryptd_cpu_queue *cpu_queue;
123 for_each_possible_cpu(cpu) {
124 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
125 BUG_ON(cpu_queue->queue.qlen);
127 free_percpu(queue->cpu_queue);
130 static int cryptd_enqueue_request(struct cryptd_queue *queue,
131 struct crypto_async_request *request)
134 struct cryptd_cpu_queue *cpu_queue;
138 cpu_queue = this_cpu_ptr(queue->cpu_queue);
139 err = crypto_enqueue_request(&cpu_queue->queue, request);
141 refcnt = crypto_tfm_ctx(request->tfm);
146 queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work);
148 if (!refcount_read(refcnt))
151 refcount_inc(refcnt);
159 /* Called in workqueue context, do one real cryption work (via
160 * req->complete) and reschedule itself if there are more work to
162 static void cryptd_queue_worker(struct work_struct *work)
164 struct cryptd_cpu_queue *cpu_queue;
165 struct crypto_async_request *req, *backlog;
167 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
169 * Only handle one request at a time to avoid hogging crypto workqueue.
172 backlog = crypto_get_backlog(&cpu_queue->queue);
173 req = crypto_dequeue_request(&cpu_queue->queue);
180 crypto_request_complete(backlog, -EINPROGRESS);
181 crypto_request_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 void cryptd_type_and_mask(struct crypto_attr_type *algt,
195 u32 *type, u32 *mask)
198 * cryptd is allowed to wrap internal algorithms, but in that case the
199 * resulting cryptd instance will be marked as internal as well.
201 *type = algt->type & CRYPTO_ALG_INTERNAL;
202 *mask = algt->mask & CRYPTO_ALG_INTERNAL;
204 /* No point in cryptd wrapping an algorithm that's already async. */
205 *mask |= CRYPTO_ALG_ASYNC;
207 *mask |= crypto_algt_inherited_mask(algt);
210 static int cryptd_init_instance(struct crypto_instance *inst,
211 struct crypto_alg *alg)
213 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
215 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
216 return -ENAMETOOLONG;
218 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
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;
227 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
228 const u8 *key, unsigned int keylen)
230 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
231 struct crypto_skcipher *child = ctx->child;
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);
240 static struct skcipher_request *cryptd_skcipher_prepare(
241 struct skcipher_request *req, int err)
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;
248 req->base.complete = subreq->base.complete;
249 req->base.data = subreq->base.data;
251 if (unlikely(err == -EINPROGRESS))
254 ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
257 skcipher_request_set_tfm(subreq, child);
258 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
260 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
266 static void cryptd_skcipher_complete(struct skcipher_request *req, int err,
267 crypto_completion_t complete)
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);
276 skcipher_request_complete(req, err);
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);
288 static void cryptd_skcipher_encrypt(void *data, int err)
290 struct skcipher_request *req = data;
291 struct skcipher_request *subreq;
293 subreq = cryptd_skcipher_prepare(req, err);
295 err = crypto_skcipher_encrypt(subreq);
297 cryptd_skcipher_complete(req, err, cryptd_skcipher_encrypt);
300 static void cryptd_skcipher_decrypt(void *data, int err)
302 struct skcipher_request *req = data;
303 struct skcipher_request *subreq;
305 subreq = cryptd_skcipher_prepare(req, err);
307 err = crypto_skcipher_decrypt(subreq);
309 cryptd_skcipher_complete(req, err, cryptd_skcipher_decrypt);
312 static int cryptd_skcipher_enqueue(struct skcipher_request *req,
313 crypto_completion_t compl)
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;
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;
326 return cryptd_enqueue_request(queue, &req->base);
329 static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
331 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
334 static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
336 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
339 static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
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;
347 cipher = crypto_spawn_skcipher(spawn);
349 return PTR_ERR(cipher);
352 crypto_skcipher_set_reqsize(
353 tfm, sizeof(struct cryptd_skcipher_request_ctx) +
354 crypto_skcipher_reqsize(cipher));
358 static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
360 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
362 crypto_free_skcipher(ctx->child);
365 static void cryptd_skcipher_free(struct skcipher_instance *inst)
367 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
369 crypto_drop_skcipher(&ctx->spawn);
373 static int cryptd_create_skcipher(struct crypto_template *tmpl,
375 struct crypto_attr_type *algt,
376 struct cryptd_queue *queue)
378 struct skcipherd_instance_ctx *ctx;
379 struct skcipher_instance *inst;
380 struct skcipher_alg *alg;
385 cryptd_type_and_mask(algt, &type, &mask);
387 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
391 ctx = skcipher_instance_ctx(inst);
394 err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
395 crypto_attr_alg_name(tb[1]), type, mask);
399 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
400 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
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);
411 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
413 inst->alg.init = cryptd_skcipher_init_tfm;
414 inst->alg.exit = cryptd_skcipher_exit_tfm;
416 inst->alg.setkey = cryptd_skcipher_setkey;
417 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
418 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
420 inst->free = cryptd_skcipher_free;
422 err = skcipher_register_instance(tmpl, inst);
425 cryptd_skcipher_free(inst);
430 static int cryptd_hash_init_tfm(struct crypto_ahash *tfm)
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;
438 hash = crypto_spawn_shash(spawn);
440 return PTR_ERR(hash);
443 crypto_ahash_set_reqsize(tfm,
444 sizeof(struct cryptd_hash_request_ctx) +
445 crypto_shash_descsize(hash));
449 static int cryptd_hash_clone_tfm(struct crypto_ahash *ntfm,
450 struct crypto_ahash *tfm)
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;
456 hash = crypto_clone_shash(ctx->child);
458 return PTR_ERR(hash);
464 static void cryptd_hash_exit_tfm(struct crypto_ahash *tfm)
466 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
468 crypto_free_shash(ctx->child);
471 static int cryptd_hash_setkey(struct crypto_ahash *parent,
472 const u8 *key, unsigned int keylen)
474 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
475 struct crypto_shash *child = ctx->child;
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);
483 static int cryptd_hash_enqueue(struct ahash_request *req,
484 crypto_completion_t compl)
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));
491 rctx->complete = req->base.complete;
492 rctx->data = req->base.data;
493 req->base.complete = compl;
494 req->base.data = req;
496 return cryptd_enqueue_request(queue, &req->base);
499 static struct shash_desc *cryptd_hash_prepare(struct ahash_request *req,
502 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
504 req->base.complete = rctx->complete;
505 req->base.data = rctx->data;
507 if (unlikely(err == -EINPROGRESS))
513 static void cryptd_hash_complete(struct ahash_request *req, int err,
514 crypto_completion_t complete)
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);
521 ahash_request_complete(req, err);
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);
531 static void cryptd_hash_init(void *data, int err)
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;
539 desc = cryptd_hash_prepare(req, err);
545 err = crypto_shash_init(desc);
548 cryptd_hash_complete(req, err, cryptd_hash_init);
551 static int cryptd_hash_init_enqueue(struct ahash_request *req)
553 return cryptd_hash_enqueue(req, cryptd_hash_init);
556 static void cryptd_hash_update(void *data, int err)
558 struct ahash_request *req = data;
559 struct shash_desc *desc;
561 desc = cryptd_hash_prepare(req, err);
563 err = shash_ahash_update(req, desc);
565 cryptd_hash_complete(req, err, cryptd_hash_update);
568 static int cryptd_hash_update_enqueue(struct ahash_request *req)
570 return cryptd_hash_enqueue(req, cryptd_hash_update);
573 static void cryptd_hash_final(void *data, int err)
575 struct ahash_request *req = data;
576 struct shash_desc *desc;
578 desc = cryptd_hash_prepare(req, err);
580 err = crypto_shash_final(desc, req->result);
582 cryptd_hash_complete(req, err, cryptd_hash_final);
585 static int cryptd_hash_final_enqueue(struct ahash_request *req)
587 return cryptd_hash_enqueue(req, cryptd_hash_final);
590 static void cryptd_hash_finup(void *data, int err)
592 struct ahash_request *req = data;
593 struct shash_desc *desc;
595 desc = cryptd_hash_prepare(req, err);
597 err = shash_ahash_finup(req, desc);
599 cryptd_hash_complete(req, err, cryptd_hash_finup);
602 static int cryptd_hash_finup_enqueue(struct ahash_request *req)
604 return cryptd_hash_enqueue(req, cryptd_hash_finup);
607 static void cryptd_hash_digest(void *data, int err)
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;
615 desc = cryptd_hash_prepare(req, err);
621 err = shash_ahash_digest(req, desc);
624 cryptd_hash_complete(req, err, cryptd_hash_digest);
627 static int cryptd_hash_digest_enqueue(struct ahash_request *req)
629 return cryptd_hash_enqueue(req, cryptd_hash_digest);
632 static int cryptd_hash_export(struct ahash_request *req, void *out)
634 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
636 return crypto_shash_export(&rctx->desc, out);
639 static int cryptd_hash_import(struct ahash_request *req, const void *in)
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);
645 desc->tfm = ctx->child;
647 return crypto_shash_import(desc, in);
650 static void cryptd_hash_free(struct ahash_instance *inst)
652 struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst);
654 crypto_drop_shash(&ctx->spawn);
658 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
659 struct crypto_attr_type *algt,
660 struct cryptd_queue *queue)
662 struct hashd_instance_ctx *ctx;
663 struct ahash_instance *inst;
664 struct shash_alg *alg;
669 cryptd_type_and_mask(algt, &type, &mask);
671 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
675 ctx = ahash_instance_ctx(inst);
678 err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst),
679 crypto_attr_alg_name(tb[1]), type, mask);
682 alg = crypto_spawn_shash_alg(&ctx->spawn);
684 err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base);
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);
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;
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;
709 inst->free = cryptd_hash_free;
711 err = ahash_register_instance(tmpl, inst);
714 cryptd_hash_free(inst);
719 static int cryptd_aead_setkey(struct crypto_aead *parent,
720 const u8 *key, unsigned int keylen)
722 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
723 struct crypto_aead *child = ctx->child;
725 return crypto_aead_setkey(child, key, keylen);
728 static int cryptd_aead_setauthsize(struct crypto_aead *parent,
729 unsigned int authsize)
731 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
732 struct crypto_aead *child = ctx->child;
734 return crypto_aead_setauthsize(child, authsize);
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)
742 struct cryptd_aead_request_ctx *rctx;
743 struct aead_request *subreq;
744 struct cryptd_aead_ctx *ctx;
745 struct crypto_aead *tfm;
748 rctx = aead_request_ctx(req);
750 req->base.complete = subreq->base.complete;
751 req->base.data = subreq->base.data;
753 tfm = crypto_aead_reqtfm(req);
755 if (unlikely(err == -EINPROGRESS))
758 aead_request_set_tfm(subreq, child);
759 aead_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
761 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
763 aead_request_set_ad(subreq, req->assoclen);
768 ctx = crypto_aead_ctx(tfm);
769 refcnt = refcount_read(&ctx->refcnt);
772 aead_request_complete(req, err);
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);
784 static void cryptd_aead_encrypt(void *data, int err)
786 struct aead_request *req = data;
787 struct cryptd_aead_ctx *ctx;
788 struct crypto_aead *child;
790 ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
792 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt,
793 cryptd_aead_encrypt);
796 static void cryptd_aead_decrypt(void *data, int err)
798 struct aead_request *req = data;
799 struct cryptd_aead_ctx *ctx;
800 struct crypto_aead *child;
802 ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
804 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt,
805 cryptd_aead_decrypt);
808 static int cryptd_aead_enqueue(struct aead_request *req,
809 crypto_completion_t compl)
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;
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);
823 static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
825 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
828 static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
830 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
833 static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
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;
841 cipher = crypto_spawn_aead(spawn);
843 return PTR_ERR(cipher);
846 crypto_aead_set_reqsize(
847 tfm, sizeof(struct cryptd_aead_request_ctx) +
848 crypto_aead_reqsize(cipher));
852 static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
854 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
855 crypto_free_aead(ctx->child);
858 static void cryptd_aead_free(struct aead_instance *inst)
860 struct aead_instance_ctx *ctx = aead_instance_ctx(inst);
862 crypto_drop_aead(&ctx->aead_spawn);
866 static int cryptd_create_aead(struct crypto_template *tmpl,
868 struct crypto_attr_type *algt,
869 struct cryptd_queue *queue)
871 struct aead_instance_ctx *ctx;
872 struct aead_instance *inst;
873 struct aead_alg *alg;
878 cryptd_type_and_mask(algt, &type, &mask);
880 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
884 ctx = aead_instance_ctx(inst);
887 err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
888 crypto_attr_alg_name(tb[1]), type, mask);
892 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
893 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
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);
901 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
902 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
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;
911 inst->free = cryptd_aead_free;
913 err = aead_register_instance(tmpl, inst);
916 cryptd_aead_free(inst);
921 static struct cryptd_queue queue;
923 static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
925 struct crypto_attr_type *algt;
927 algt = crypto_get_attr_type(tb);
929 return PTR_ERR(algt);
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);
943 static struct crypto_template cryptd_tmpl = {
945 .create = cryptd_create,
946 .module = THIS_MODULE,
949 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
952 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
953 struct cryptd_skcipher_ctx *ctx;
954 struct crypto_skcipher *tfm;
956 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
957 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
958 return ERR_PTR(-EINVAL);
960 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
962 return ERR_CAST(tfm);
964 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
965 crypto_free_skcipher(tfm);
966 return ERR_PTR(-EINVAL);
969 ctx = crypto_skcipher_ctx(tfm);
970 refcount_set(&ctx->refcnt, 1);
972 return container_of(tfm, struct cryptd_skcipher, base);
974 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
976 struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
978 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
982 EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
984 bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
986 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
988 return refcount_read(&ctx->refcnt) - 1;
990 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
992 void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
994 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
996 if (refcount_dec_and_test(&ctx->refcnt))
997 crypto_free_skcipher(&tfm->base);
999 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1001 struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1004 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1005 struct cryptd_hash_ctx *ctx;
1006 struct crypto_ahash *tfm;
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);
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);
1019 ctx = crypto_ahash_ctx(tfm);
1020 refcount_set(&ctx->refcnt, 1);
1022 return __cryptd_ahash_cast(tfm);
1024 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1026 struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1028 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1032 EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1034 struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1036 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1039 EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1041 bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1043 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1045 return refcount_read(&ctx->refcnt) - 1;
1047 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1049 void cryptd_free_ahash(struct cryptd_ahash *tfm)
1051 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1053 if (refcount_dec_and_test(&ctx->refcnt))
1054 crypto_free_ahash(&tfm->base);
1056 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1058 struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1061 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1062 struct cryptd_aead_ctx *ctx;
1063 struct crypto_aead *tfm;
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);
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);
1076 ctx = crypto_aead_ctx(tfm);
1077 refcount_set(&ctx->refcnt, 1);
1079 return __cryptd_aead_cast(tfm);
1081 EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1083 struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1085 struct cryptd_aead_ctx *ctx;
1086 ctx = crypto_aead_ctx(&tfm->base);
1089 EXPORT_SYMBOL_GPL(cryptd_aead_child);
1091 bool cryptd_aead_queued(struct cryptd_aead *tfm)
1093 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1095 return refcount_read(&ctx->refcnt) - 1;
1097 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1099 void cryptd_free_aead(struct cryptd_aead *tfm)
1101 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1103 if (refcount_dec_and_test(&ctx->refcnt))
1104 crypto_free_aead(&tfm->base);
1106 EXPORT_SYMBOL_GPL(cryptd_free_aead);
1108 static int __init cryptd_init(void)
1112 cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1117 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1119 goto err_destroy_wq;
1121 err = crypto_register_template(&cryptd_tmpl);
1123 goto err_fini_queue;
1128 cryptd_fini_queue(&queue);
1130 destroy_workqueue(cryptd_wq);
1134 static void __exit cryptd_exit(void)
1136 destroy_workqueue(cryptd_wq);
1137 cryptd_fini_queue(&queue);
1138 crypto_unregister_template(&cryptd_tmpl);
1141 subsys_initcall(cryptd_init);
1142 module_exit(cryptd_exit);
1144 MODULE_LICENSE("GPL");
1145 MODULE_DESCRIPTION("Software async crypto daemon");
1146 MODULE_ALIAS_CRYPTO("cryptd");