2 * Software async crypto daemon.
6 * Added AEAD support to cryptd.
11 * Copyright (c) 2010, Intel Corporation.
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
20 #include <crypto/internal/hash.h>
21 #include <crypto/internal/aead.h>
22 #include <crypto/internal/skcipher.h>
23 #include <crypto/cryptd.h>
24 #include <crypto/crypto_wq.h>
25 #include <linux/atomic.h>
26 #include <linux/err.h>
27 #include <linux/init.h>
28 #include <linux/kernel.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/scatterlist.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
35 static unsigned int cryptd_max_cpu_qlen = 1000;
36 module_param(cryptd_max_cpu_qlen, uint, 0);
37 MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
39 struct cryptd_cpu_queue {
40 struct crypto_queue queue;
41 struct work_struct work;
45 struct cryptd_cpu_queue __percpu *cpu_queue;
48 struct cryptd_instance_ctx {
49 struct crypto_spawn spawn;
50 struct cryptd_queue *queue;
53 struct skcipherd_instance_ctx {
54 struct crypto_skcipher_spawn spawn;
55 struct cryptd_queue *queue;
58 struct hashd_instance_ctx {
59 struct crypto_shash_spawn spawn;
60 struct cryptd_queue *queue;
63 struct aead_instance_ctx {
64 struct crypto_aead_spawn aead_spawn;
65 struct cryptd_queue *queue;
68 struct cryptd_skcipher_ctx {
70 struct crypto_sync_skcipher *child;
73 struct cryptd_skcipher_request_ctx {
74 crypto_completion_t complete;
77 struct cryptd_hash_ctx {
79 struct crypto_shash *child;
82 struct cryptd_hash_request_ctx {
83 crypto_completion_t complete;
84 struct shash_desc desc;
87 struct cryptd_aead_ctx {
89 struct crypto_aead *child;
92 struct cryptd_aead_request_ctx {
93 crypto_completion_t complete;
96 static void cryptd_queue_worker(struct work_struct *work);
98 static int cryptd_init_queue(struct cryptd_queue *queue,
99 unsigned int max_cpu_qlen)
102 struct cryptd_cpu_queue *cpu_queue;
104 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
105 if (!queue->cpu_queue)
107 for_each_possible_cpu(cpu) {
108 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
109 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
110 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
112 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
116 static void cryptd_fini_queue(struct cryptd_queue *queue)
119 struct cryptd_cpu_queue *cpu_queue;
121 for_each_possible_cpu(cpu) {
122 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
123 BUG_ON(cpu_queue->queue.qlen);
125 free_percpu(queue->cpu_queue);
128 static int cryptd_enqueue_request(struct cryptd_queue *queue,
129 struct crypto_async_request *request)
132 struct cryptd_cpu_queue *cpu_queue;
136 cpu_queue = this_cpu_ptr(queue->cpu_queue);
137 err = crypto_enqueue_request(&cpu_queue->queue, request);
139 refcnt = crypto_tfm_ctx(request->tfm);
144 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
146 if (!atomic_read(refcnt))
157 /* Called in workqueue context, do one real cryption work (via
158 * req->complete) and reschedule itself if there are more work to
160 static void cryptd_queue_worker(struct work_struct *work)
162 struct cryptd_cpu_queue *cpu_queue;
163 struct crypto_async_request *req, *backlog;
165 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
167 * Only handle one request at a time to avoid hogging crypto workqueue.
168 * preempt_disable/enable is used to prevent being preempted by
169 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
170 * cryptd_enqueue_request() being accessed from software interrupts.
174 backlog = crypto_get_backlog(&cpu_queue->queue);
175 req = crypto_dequeue_request(&cpu_queue->queue);
183 backlog->complete(backlog, -EINPROGRESS);
184 req->complete(req, 0);
186 if (cpu_queue->queue.qlen)
187 queue_work(kcrypto_wq, &cpu_queue->work);
190 static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
192 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
193 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
197 static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
200 struct crypto_attr_type *algt;
202 algt = crypto_get_attr_type(tb);
206 *type |= algt->type & CRYPTO_ALG_INTERNAL;
207 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
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 void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
231 struct crypto_instance *inst;
234 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
236 return ERR_PTR(-ENOMEM);
238 inst = (void *)(p + head);
240 err = cryptd_init_instance(inst, alg);
253 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
254 const u8 *key, unsigned int keylen)
256 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
257 struct crypto_sync_skcipher *child = ctx->child;
260 crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
261 crypto_sync_skcipher_set_flags(child,
262 crypto_skcipher_get_flags(parent) &
263 CRYPTO_TFM_REQ_MASK);
264 err = crypto_sync_skcipher_setkey(child, key, keylen);
265 crypto_skcipher_set_flags(parent,
266 crypto_sync_skcipher_get_flags(child) &
267 CRYPTO_TFM_RES_MASK);
271 static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
273 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
274 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
275 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
276 int refcnt = atomic_read(&ctx->refcnt);
279 rctx->complete(&req->base, err);
282 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
283 crypto_free_skcipher(tfm);
286 static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
289 struct skcipher_request *req = skcipher_request_cast(base);
290 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
291 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
292 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
293 struct crypto_sync_skcipher *child = ctx->child;
294 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
296 if (unlikely(err == -EINPROGRESS))
299 skcipher_request_set_sync_tfm(subreq, child);
300 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
302 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
305 err = crypto_skcipher_encrypt(subreq);
306 skcipher_request_zero(subreq);
308 req->base.complete = rctx->complete;
311 cryptd_skcipher_complete(req, err);
314 static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
317 struct skcipher_request *req = skcipher_request_cast(base);
318 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
319 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
320 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
321 struct crypto_sync_skcipher *child = ctx->child;
322 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
324 if (unlikely(err == -EINPROGRESS))
327 skcipher_request_set_sync_tfm(subreq, child);
328 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
330 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
333 err = crypto_skcipher_decrypt(subreq);
334 skcipher_request_zero(subreq);
336 req->base.complete = rctx->complete;
339 cryptd_skcipher_complete(req, err);
342 static int cryptd_skcipher_enqueue(struct skcipher_request *req,
343 crypto_completion_t compl)
345 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
346 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
347 struct cryptd_queue *queue;
349 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
350 rctx->complete = req->base.complete;
351 req->base.complete = compl;
353 return cryptd_enqueue_request(queue, &req->base);
356 static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
358 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
361 static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
363 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
366 static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
368 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
369 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
370 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
371 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
372 struct crypto_skcipher *cipher;
374 cipher = crypto_spawn_skcipher(spawn);
376 return PTR_ERR(cipher);
378 ctx->child = (struct crypto_sync_skcipher *)cipher;
379 crypto_skcipher_set_reqsize(
380 tfm, sizeof(struct cryptd_skcipher_request_ctx));
384 static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
386 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
388 crypto_free_sync_skcipher(ctx->child);
391 static void cryptd_skcipher_free(struct skcipher_instance *inst)
393 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
395 crypto_drop_skcipher(&ctx->spawn);
398 static int cryptd_create_skcipher(struct crypto_template *tmpl,
400 struct cryptd_queue *queue)
402 struct skcipherd_instance_ctx *ctx;
403 struct skcipher_instance *inst;
404 struct skcipher_alg *alg;
411 mask = CRYPTO_ALG_ASYNC;
413 cryptd_check_internal(tb, &type, &mask);
415 name = crypto_attr_alg_name(tb[1]);
417 return PTR_ERR(name);
419 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
423 ctx = skcipher_instance_ctx(inst);
426 crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
427 err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
431 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
432 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
434 goto out_drop_skcipher;
436 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
437 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
439 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
440 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
441 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
442 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
444 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
446 inst->alg.init = cryptd_skcipher_init_tfm;
447 inst->alg.exit = cryptd_skcipher_exit_tfm;
449 inst->alg.setkey = cryptd_skcipher_setkey;
450 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
451 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
453 inst->free = cryptd_skcipher_free;
455 err = skcipher_register_instance(tmpl, inst);
458 crypto_drop_skcipher(&ctx->spawn);
465 static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
467 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
468 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
469 struct crypto_shash_spawn *spawn = &ictx->spawn;
470 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
471 struct crypto_shash *hash;
473 hash = crypto_spawn_shash(spawn);
475 return PTR_ERR(hash);
478 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
479 sizeof(struct cryptd_hash_request_ctx) +
480 crypto_shash_descsize(hash));
484 static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
486 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
488 crypto_free_shash(ctx->child);
491 static int cryptd_hash_setkey(struct crypto_ahash *parent,
492 const u8 *key, unsigned int keylen)
494 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
495 struct crypto_shash *child = ctx->child;
498 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
499 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
500 CRYPTO_TFM_REQ_MASK);
501 err = crypto_shash_setkey(child, key, keylen);
502 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
503 CRYPTO_TFM_RES_MASK);
507 static int cryptd_hash_enqueue(struct ahash_request *req,
508 crypto_completion_t compl)
510 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
511 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
512 struct cryptd_queue *queue =
513 cryptd_get_queue(crypto_ahash_tfm(tfm));
515 rctx->complete = req->base.complete;
516 req->base.complete = compl;
518 return cryptd_enqueue_request(queue, &req->base);
521 static void cryptd_hash_complete(struct ahash_request *req, int err)
523 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
524 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
525 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
526 int refcnt = atomic_read(&ctx->refcnt);
529 rctx->complete(&req->base, err);
532 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
533 crypto_free_ahash(tfm);
536 static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
538 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
539 struct crypto_shash *child = ctx->child;
540 struct ahash_request *req = ahash_request_cast(req_async);
541 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
542 struct shash_desc *desc = &rctx->desc;
544 if (unlikely(err == -EINPROGRESS))
549 err = crypto_shash_init(desc);
551 req->base.complete = rctx->complete;
554 cryptd_hash_complete(req, err);
557 static int cryptd_hash_init_enqueue(struct ahash_request *req)
559 return cryptd_hash_enqueue(req, cryptd_hash_init);
562 static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
564 struct ahash_request *req = ahash_request_cast(req_async);
565 struct cryptd_hash_request_ctx *rctx;
567 rctx = ahash_request_ctx(req);
569 if (unlikely(err == -EINPROGRESS))
572 err = shash_ahash_update(req, &rctx->desc);
574 req->base.complete = rctx->complete;
577 cryptd_hash_complete(req, err);
580 static int cryptd_hash_update_enqueue(struct ahash_request *req)
582 return cryptd_hash_enqueue(req, cryptd_hash_update);
585 static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
587 struct ahash_request *req = ahash_request_cast(req_async);
588 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
590 if (unlikely(err == -EINPROGRESS))
593 err = crypto_shash_final(&rctx->desc, req->result);
595 req->base.complete = rctx->complete;
598 cryptd_hash_complete(req, err);
601 static int cryptd_hash_final_enqueue(struct ahash_request *req)
603 return cryptd_hash_enqueue(req, cryptd_hash_final);
606 static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
608 struct ahash_request *req = ahash_request_cast(req_async);
609 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
611 if (unlikely(err == -EINPROGRESS))
614 err = shash_ahash_finup(req, &rctx->desc);
616 req->base.complete = rctx->complete;
619 cryptd_hash_complete(req, err);
622 static int cryptd_hash_finup_enqueue(struct ahash_request *req)
624 return cryptd_hash_enqueue(req, cryptd_hash_finup);
627 static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
629 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
630 struct crypto_shash *child = ctx->child;
631 struct ahash_request *req = ahash_request_cast(req_async);
632 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
633 struct shash_desc *desc = &rctx->desc;
635 if (unlikely(err == -EINPROGRESS))
640 err = shash_ahash_digest(req, desc);
642 req->base.complete = rctx->complete;
645 cryptd_hash_complete(req, err);
648 static int cryptd_hash_digest_enqueue(struct ahash_request *req)
650 return cryptd_hash_enqueue(req, cryptd_hash_digest);
653 static int cryptd_hash_export(struct ahash_request *req, void *out)
655 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
657 return crypto_shash_export(&rctx->desc, out);
660 static int cryptd_hash_import(struct ahash_request *req, const void *in)
662 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
663 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
664 struct shash_desc *desc = cryptd_shash_desc(req);
666 desc->tfm = ctx->child;
668 return crypto_shash_import(desc, in);
671 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
672 struct cryptd_queue *queue)
674 struct hashd_instance_ctx *ctx;
675 struct ahash_instance *inst;
676 struct shash_alg *salg;
677 struct crypto_alg *alg;
682 cryptd_check_internal(tb, &type, &mask);
684 salg = shash_attr_alg(tb[1], type, mask);
686 return PTR_ERR(salg);
689 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
695 ctx = ahash_instance_ctx(inst);
698 err = crypto_init_shash_spawn(&ctx->spawn, salg,
699 ahash_crypto_instance(inst));
703 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
704 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
705 CRYPTO_ALG_OPTIONAL_KEY));
707 inst->alg.halg.digestsize = salg->digestsize;
708 inst->alg.halg.statesize = salg->statesize;
709 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
711 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
712 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
714 inst->alg.init = cryptd_hash_init_enqueue;
715 inst->alg.update = cryptd_hash_update_enqueue;
716 inst->alg.final = cryptd_hash_final_enqueue;
717 inst->alg.finup = cryptd_hash_finup_enqueue;
718 inst->alg.export = cryptd_hash_export;
719 inst->alg.import = cryptd_hash_import;
720 if (crypto_shash_alg_has_setkey(salg))
721 inst->alg.setkey = cryptd_hash_setkey;
722 inst->alg.digest = cryptd_hash_digest_enqueue;
724 err = ahash_register_instance(tmpl, inst);
726 crypto_drop_shash(&ctx->spawn);
736 static int cryptd_aead_setkey(struct crypto_aead *parent,
737 const u8 *key, unsigned int keylen)
739 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
740 struct crypto_aead *child = ctx->child;
742 return crypto_aead_setkey(child, key, keylen);
745 static int cryptd_aead_setauthsize(struct crypto_aead *parent,
746 unsigned int authsize)
748 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
749 struct crypto_aead *child = ctx->child;
751 return crypto_aead_setauthsize(child, authsize);
754 static void cryptd_aead_crypt(struct aead_request *req,
755 struct crypto_aead *child,
757 int (*crypt)(struct aead_request *req))
759 struct cryptd_aead_request_ctx *rctx;
760 struct cryptd_aead_ctx *ctx;
761 crypto_completion_t compl;
762 struct crypto_aead *tfm;
765 rctx = aead_request_ctx(req);
766 compl = rctx->complete;
768 tfm = crypto_aead_reqtfm(req);
770 if (unlikely(err == -EINPROGRESS))
772 aead_request_set_tfm(req, child);
776 ctx = crypto_aead_ctx(tfm);
777 refcnt = atomic_read(&ctx->refcnt);
780 compl(&req->base, err);
783 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
784 crypto_free_aead(tfm);
787 static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
789 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
790 struct crypto_aead *child = ctx->child;
791 struct aead_request *req;
793 req = container_of(areq, struct aead_request, base);
794 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
797 static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
799 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
800 struct crypto_aead *child = ctx->child;
801 struct aead_request *req;
803 req = container_of(areq, struct aead_request, base);
804 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
807 static int cryptd_aead_enqueue(struct aead_request *req,
808 crypto_completion_t compl)
810 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
811 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
812 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
814 rctx->complete = req->base.complete;
815 req->base.complete = compl;
816 return cryptd_enqueue_request(queue, &req->base);
819 static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
821 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
824 static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
826 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
829 static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
831 struct aead_instance *inst = aead_alg_instance(tfm);
832 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
833 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
834 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
835 struct crypto_aead *cipher;
837 cipher = crypto_spawn_aead(spawn);
839 return PTR_ERR(cipher);
842 crypto_aead_set_reqsize(
843 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
844 crypto_aead_reqsize(cipher)));
848 static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
850 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
851 crypto_free_aead(ctx->child);
854 static int cryptd_create_aead(struct crypto_template *tmpl,
856 struct cryptd_queue *queue)
858 struct aead_instance_ctx *ctx;
859 struct aead_instance *inst;
860 struct aead_alg *alg;
863 u32 mask = CRYPTO_ALG_ASYNC;
866 cryptd_check_internal(tb, &type, &mask);
868 name = crypto_attr_alg_name(tb[1]);
870 return PTR_ERR(name);
872 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
876 ctx = aead_instance_ctx(inst);
879 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
880 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
884 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
885 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
889 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
890 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
891 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
893 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
894 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
896 inst->alg.init = cryptd_aead_init_tfm;
897 inst->alg.exit = cryptd_aead_exit_tfm;
898 inst->alg.setkey = cryptd_aead_setkey;
899 inst->alg.setauthsize = cryptd_aead_setauthsize;
900 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
901 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
903 err = aead_register_instance(tmpl, inst);
906 crypto_drop_aead(&ctx->aead_spawn);
913 static struct cryptd_queue queue;
915 static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
917 struct crypto_attr_type *algt;
919 algt = crypto_get_attr_type(tb);
921 return PTR_ERR(algt);
923 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
924 case CRYPTO_ALG_TYPE_BLKCIPHER:
925 return cryptd_create_skcipher(tmpl, tb, &queue);
926 case CRYPTO_ALG_TYPE_DIGEST:
927 return cryptd_create_hash(tmpl, tb, &queue);
928 case CRYPTO_ALG_TYPE_AEAD:
929 return cryptd_create_aead(tmpl, tb, &queue);
935 static void cryptd_free(struct crypto_instance *inst)
937 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
938 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
939 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
941 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
942 case CRYPTO_ALG_TYPE_AHASH:
943 crypto_drop_shash(&hctx->spawn);
944 kfree(ahash_instance(inst));
946 case CRYPTO_ALG_TYPE_AEAD:
947 crypto_drop_aead(&aead_ctx->aead_spawn);
948 kfree(aead_instance(inst));
951 crypto_drop_spawn(&ctx->spawn);
956 static struct crypto_template cryptd_tmpl = {
958 .create = cryptd_create,
960 .module = THIS_MODULE,
963 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
966 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
967 struct cryptd_skcipher_ctx *ctx;
968 struct crypto_skcipher *tfm;
970 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
971 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
972 return ERR_PTR(-EINVAL);
974 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
976 return ERR_CAST(tfm);
978 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
979 crypto_free_skcipher(tfm);
980 return ERR_PTR(-EINVAL);
983 ctx = crypto_skcipher_ctx(tfm);
984 atomic_set(&ctx->refcnt, 1);
986 return container_of(tfm, struct cryptd_skcipher, base);
988 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
990 struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
992 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
994 return &ctx->child->base;
996 EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
998 bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
1000 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1002 return atomic_read(&ctx->refcnt) - 1;
1004 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1006 void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1008 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1010 if (atomic_dec_and_test(&ctx->refcnt))
1011 crypto_free_skcipher(&tfm->base);
1013 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1015 struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1018 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1019 struct cryptd_hash_ctx *ctx;
1020 struct crypto_ahash *tfm;
1022 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1023 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1024 return ERR_PTR(-EINVAL);
1025 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1027 return ERR_CAST(tfm);
1028 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1029 crypto_free_ahash(tfm);
1030 return ERR_PTR(-EINVAL);
1033 ctx = crypto_ahash_ctx(tfm);
1034 atomic_set(&ctx->refcnt, 1);
1036 return __cryptd_ahash_cast(tfm);
1038 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1040 struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1042 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1046 EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1048 struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1050 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1053 EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1055 bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1057 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1059 return atomic_read(&ctx->refcnt) - 1;
1061 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1063 void cryptd_free_ahash(struct cryptd_ahash *tfm)
1065 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1067 if (atomic_dec_and_test(&ctx->refcnt))
1068 crypto_free_ahash(&tfm->base);
1070 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1072 struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1075 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1076 struct cryptd_aead_ctx *ctx;
1077 struct crypto_aead *tfm;
1079 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1080 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1081 return ERR_PTR(-EINVAL);
1082 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1084 return ERR_CAST(tfm);
1085 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1086 crypto_free_aead(tfm);
1087 return ERR_PTR(-EINVAL);
1090 ctx = crypto_aead_ctx(tfm);
1091 atomic_set(&ctx->refcnt, 1);
1093 return __cryptd_aead_cast(tfm);
1095 EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1097 struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1099 struct cryptd_aead_ctx *ctx;
1100 ctx = crypto_aead_ctx(&tfm->base);
1103 EXPORT_SYMBOL_GPL(cryptd_aead_child);
1105 bool cryptd_aead_queued(struct cryptd_aead *tfm)
1107 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1109 return atomic_read(&ctx->refcnt) - 1;
1111 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1113 void cryptd_free_aead(struct cryptd_aead *tfm)
1115 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1117 if (atomic_dec_and_test(&ctx->refcnt))
1118 crypto_free_aead(&tfm->base);
1120 EXPORT_SYMBOL_GPL(cryptd_free_aead);
1122 static int __init cryptd_init(void)
1126 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1130 err = crypto_register_template(&cryptd_tmpl);
1132 cryptd_fini_queue(&queue);
1137 static void __exit cryptd_exit(void)
1139 cryptd_fini_queue(&queue);
1140 crypto_unregister_template(&cryptd_tmpl);
1143 subsys_initcall(cryptd_init);
1144 module_exit(cryptd_exit);
1146 MODULE_LICENSE("GPL");
1147 MODULE_DESCRIPTION("Software async crypto daemon");
1148 MODULE_ALIAS_CRYPTO("cryptd");