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1/*
2 * Software async crypto daemon.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * Added AEAD support to cryptd.
7 * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
8 * Adrian Hoban <adrian.hoban@intel.com>
9 * Gabriele Paoloni <gabriele.paoloni@intel.com>
10 * Aidan O'Mahony (aidan.o.mahony@intel.com)
11 * Copyright (c) 2010, Intel Corporation.
12 *
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)
16 * any later version.
17 *
18 */
19
20#include <crypto/algapi.h>
21#include <crypto/internal/hash.h>
22#include <crypto/internal/aead.h>
23#include <crypto/cryptd.h>
24#include <crypto/crypto_wq.h>
25#include <linux/err.h>
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/list.h>
29#include <linux/module.h>
30#include <linux/scatterlist.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
33
34#define CRYPTD_MAX_CPU_QLEN 100
35
36struct cryptd_cpu_queue {
37 struct crypto_queue queue;
38 struct work_struct work;
39};
40
41struct cryptd_queue {
42 struct cryptd_cpu_queue __percpu *cpu_queue;
43};
44
45struct cryptd_instance_ctx {
46 struct crypto_spawn spawn;
47 struct cryptd_queue *queue;
48};
49
50struct hashd_instance_ctx {
51 struct crypto_shash_spawn spawn;
52 struct cryptd_queue *queue;
53};
54
55struct aead_instance_ctx {
56 struct crypto_aead_spawn aead_spawn;
57 struct cryptd_queue *queue;
58};
59
60struct cryptd_blkcipher_ctx {
61 struct crypto_blkcipher *child;
62};
63
64struct cryptd_blkcipher_request_ctx {
65 crypto_completion_t complete;
66};
67
68struct cryptd_hash_ctx {
69 struct crypto_shash *child;
70};
71
72struct cryptd_hash_request_ctx {
73 crypto_completion_t complete;
74 struct shash_desc desc;
75};
76
77struct cryptd_aead_ctx {
78 struct crypto_aead *child;
79};
80
81struct cryptd_aead_request_ctx {
82 crypto_completion_t complete;
83};
84
85static void cryptd_queue_worker(struct work_struct *work);
86
87static int cryptd_init_queue(struct cryptd_queue *queue,
88 unsigned int max_cpu_qlen)
89{
90 int cpu;
91 struct cryptd_cpu_queue *cpu_queue;
92
93 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
94 if (!queue->cpu_queue)
95 return -ENOMEM;
96 for_each_possible_cpu(cpu) {
97 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
98 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
99 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
100 }
101 return 0;
102}
103
104static void cryptd_fini_queue(struct cryptd_queue *queue)
105{
106 int cpu;
107 struct cryptd_cpu_queue *cpu_queue;
108
109 for_each_possible_cpu(cpu) {
110 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
111 BUG_ON(cpu_queue->queue.qlen);
112 }
113 free_percpu(queue->cpu_queue);
114}
115
116static int cryptd_enqueue_request(struct cryptd_queue *queue,
117 struct crypto_async_request *request)
118{
119 int cpu, err;
120 struct cryptd_cpu_queue *cpu_queue;
121
122 cpu = get_cpu();
123 cpu_queue = this_cpu_ptr(queue->cpu_queue);
124 err = crypto_enqueue_request(&cpu_queue->queue, request);
125 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
126 put_cpu();
127
128 return err;
129}
130
131/* Called in workqueue context, do one real cryption work (via
132 * req->complete) and reschedule itself if there are more work to
133 * do. */
134static void cryptd_queue_worker(struct work_struct *work)
135{
136 struct cryptd_cpu_queue *cpu_queue;
137 struct crypto_async_request *req, *backlog;
138
139 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
140 /*
141 * Only handle one request at a time to avoid hogging crypto workqueue.
142 * preempt_disable/enable is used to prevent being preempted by
143 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
144 * cryptd_enqueue_request() being accessed from software interrupts.
145 */
146 local_bh_disable();
147 preempt_disable();
148 backlog = crypto_get_backlog(&cpu_queue->queue);
149 req = crypto_dequeue_request(&cpu_queue->queue);
150 preempt_enable();
151 local_bh_enable();
152
153 if (!req)
154 return;
155
156 if (backlog)
157 backlog->complete(backlog, -EINPROGRESS);
158 req->complete(req, 0);
159
160 if (cpu_queue->queue.qlen)
161 queue_work(kcrypto_wq, &cpu_queue->work);
162}
163
164static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
165{
166 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
167 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
168 return ictx->queue;
169}
170
171static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
172 u32 *mask)
173{
174 struct crypto_attr_type *algt;
175
176 algt = crypto_get_attr_type(tb);
177 if (IS_ERR(algt))
178 return;
179
180 *type |= algt->type & CRYPTO_ALG_INTERNAL;
181 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
182}
183
184static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
185 const u8 *key, unsigned int keylen)
186{
187 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
188 struct crypto_blkcipher *child = ctx->child;
189 int err;
190
191 crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
192 crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
193 CRYPTO_TFM_REQ_MASK);
194 err = crypto_blkcipher_setkey(child, key, keylen);
195 crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
196 CRYPTO_TFM_RES_MASK);
197 return err;
198}
199
200static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
201 struct crypto_blkcipher *child,
202 int err,
203 int (*crypt)(struct blkcipher_desc *desc,
204 struct scatterlist *dst,
205 struct scatterlist *src,
206 unsigned int len))
207{
208 struct cryptd_blkcipher_request_ctx *rctx;
209 struct blkcipher_desc desc;
210
211 rctx = ablkcipher_request_ctx(req);
212
213 if (unlikely(err == -EINPROGRESS))
214 goto out;
215
216 desc.tfm = child;
217 desc.info = req->info;
218 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
219
220 err = crypt(&desc, req->dst, req->src, req->nbytes);
221
222 req->base.complete = rctx->complete;
223
224out:
225 local_bh_disable();
226 rctx->complete(&req->base, err);
227 local_bh_enable();
228}
229
230static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
231{
232 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
233 struct crypto_blkcipher *child = ctx->child;
234
235 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
236 crypto_blkcipher_crt(child)->encrypt);
237}
238
239static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
240{
241 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
242 struct crypto_blkcipher *child = ctx->child;
243
244 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
245 crypto_blkcipher_crt(child)->decrypt);
246}
247
248static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
249 crypto_completion_t compl)
250{
251 struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
252 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
253 struct cryptd_queue *queue;
254
255 queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
256 rctx->complete = req->base.complete;
257 req->base.complete = compl;
258
259 return cryptd_enqueue_request(queue, &req->base);
260}
261
262static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
263{
264 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
265}
266
267static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
268{
269 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
270}
271
272static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
273{
274 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
275 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
276 struct crypto_spawn *spawn = &ictx->spawn;
277 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
278 struct crypto_blkcipher *cipher;
279
280 cipher = crypto_spawn_blkcipher(spawn);
281 if (IS_ERR(cipher))
282 return PTR_ERR(cipher);
283
284 ctx->child = cipher;
285 tfm->crt_ablkcipher.reqsize =
286 sizeof(struct cryptd_blkcipher_request_ctx);
287 return 0;
288}
289
290static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
291{
292 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
293
294 crypto_free_blkcipher(ctx->child);
295}
296
297static int cryptd_init_instance(struct crypto_instance *inst,
298 struct crypto_alg *alg)
299{
300 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
301 "cryptd(%s)",
302 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
303 return -ENAMETOOLONG;
304
305 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
306
307 inst->alg.cra_priority = alg->cra_priority + 50;
308 inst->alg.cra_blocksize = alg->cra_blocksize;
309 inst->alg.cra_alignmask = alg->cra_alignmask;
310
311 return 0;
312}
313
314static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
315 unsigned int tail)
316{
317 char *p;
318 struct crypto_instance *inst;
319 int err;
320
321 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
322 if (!p)
323 return ERR_PTR(-ENOMEM);
324
325 inst = (void *)(p + head);
326
327 err = cryptd_init_instance(inst, alg);
328 if (err)
329 goto out_free_inst;
330
331out:
332 return p;
333
334out_free_inst:
335 kfree(p);
336 p = ERR_PTR(err);
337 goto out;
338}
339
340static int cryptd_create_blkcipher(struct crypto_template *tmpl,
341 struct rtattr **tb,
342 struct cryptd_queue *queue)
343{
344 struct cryptd_instance_ctx *ctx;
345 struct crypto_instance *inst;
346 struct crypto_alg *alg;
347 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
348 u32 mask = CRYPTO_ALG_TYPE_MASK;
349 int err;
350
351 cryptd_check_internal(tb, &type, &mask);
352
353 alg = crypto_get_attr_alg(tb, type, mask);
354 if (IS_ERR(alg))
355 return PTR_ERR(alg);
356
357 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
358 err = PTR_ERR(inst);
359 if (IS_ERR(inst))
360 goto out_put_alg;
361
362 ctx = crypto_instance_ctx(inst);
363 ctx->queue = queue;
364
365 err = crypto_init_spawn(&ctx->spawn, alg, inst,
366 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
367 if (err)
368 goto out_free_inst;
369
370 type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
371 if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
372 type |= CRYPTO_ALG_INTERNAL;
373 inst->alg.cra_flags = type;
374 inst->alg.cra_type = &crypto_ablkcipher_type;
375
376 inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
377 inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
378 inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
379
380 inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
381
382 inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
383
384 inst->alg.cra_init = cryptd_blkcipher_init_tfm;
385 inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
386
387 inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
388 inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
389 inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
390
391 err = crypto_register_instance(tmpl, inst);
392 if (err) {
393 crypto_drop_spawn(&ctx->spawn);
394out_free_inst:
395 kfree(inst);
396 }
397
398out_put_alg:
399 crypto_mod_put(alg);
400 return err;
401}
402
403static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
404{
405 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
406 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
407 struct crypto_shash_spawn *spawn = &ictx->spawn;
408 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
409 struct crypto_shash *hash;
410
411 hash = crypto_spawn_shash(spawn);
412 if (IS_ERR(hash))
413 return PTR_ERR(hash);
414
415 ctx->child = hash;
416 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
417 sizeof(struct cryptd_hash_request_ctx) +
418 crypto_shash_descsize(hash));
419 return 0;
420}
421
422static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
423{
424 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
425
426 crypto_free_shash(ctx->child);
427}
428
429static int cryptd_hash_setkey(struct crypto_ahash *parent,
430 const u8 *key, unsigned int keylen)
431{
432 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
433 struct crypto_shash *child = ctx->child;
434 int err;
435
436 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
437 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
438 CRYPTO_TFM_REQ_MASK);
439 err = crypto_shash_setkey(child, key, keylen);
440 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
441 CRYPTO_TFM_RES_MASK);
442 return err;
443}
444
445static int cryptd_hash_enqueue(struct ahash_request *req,
446 crypto_completion_t compl)
447{
448 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
449 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
450 struct cryptd_queue *queue =
451 cryptd_get_queue(crypto_ahash_tfm(tfm));
452
453 rctx->complete = req->base.complete;
454 req->base.complete = compl;
455
456 return cryptd_enqueue_request(queue, &req->base);
457}
458
459static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
460{
461 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
462 struct crypto_shash *child = ctx->child;
463 struct ahash_request *req = ahash_request_cast(req_async);
464 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
465 struct shash_desc *desc = &rctx->desc;
466
467 if (unlikely(err == -EINPROGRESS))
468 goto out;
469
470 desc->tfm = child;
471 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
472
473 err = crypto_shash_init(desc);
474
475 req->base.complete = rctx->complete;
476
477out:
478 local_bh_disable();
479 rctx->complete(&req->base, err);
480 local_bh_enable();
481}
482
483static int cryptd_hash_init_enqueue(struct ahash_request *req)
484{
485 return cryptd_hash_enqueue(req, cryptd_hash_init);
486}
487
488static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
489{
490 struct ahash_request *req = ahash_request_cast(req_async);
491 struct cryptd_hash_request_ctx *rctx;
492
493 rctx = ahash_request_ctx(req);
494
495 if (unlikely(err == -EINPROGRESS))
496 goto out;
497
498 err = shash_ahash_update(req, &rctx->desc);
499
500 req->base.complete = rctx->complete;
501
502out:
503 local_bh_disable();
504 rctx->complete(&req->base, err);
505 local_bh_enable();
506}
507
508static int cryptd_hash_update_enqueue(struct ahash_request *req)
509{
510 return cryptd_hash_enqueue(req, cryptd_hash_update);
511}
512
513static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
514{
515 struct ahash_request *req = ahash_request_cast(req_async);
516 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
517
518 if (unlikely(err == -EINPROGRESS))
519 goto out;
520
521 err = crypto_shash_final(&rctx->desc, req->result);
522
523 req->base.complete = rctx->complete;
524
525out:
526 local_bh_disable();
527 rctx->complete(&req->base, err);
528 local_bh_enable();
529}
530
531static int cryptd_hash_final_enqueue(struct ahash_request *req)
532{
533 return cryptd_hash_enqueue(req, cryptd_hash_final);
534}
535
536static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
537{
538 struct ahash_request *req = ahash_request_cast(req_async);
539 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
540
541 if (unlikely(err == -EINPROGRESS))
542 goto out;
543
544 err = shash_ahash_finup(req, &rctx->desc);
545
546 req->base.complete = rctx->complete;
547
548out:
549 local_bh_disable();
550 rctx->complete(&req->base, err);
551 local_bh_enable();
552}
553
554static int cryptd_hash_finup_enqueue(struct ahash_request *req)
555{
556 return cryptd_hash_enqueue(req, cryptd_hash_finup);
557}
558
559static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
560{
561 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
562 struct crypto_shash *child = ctx->child;
563 struct ahash_request *req = ahash_request_cast(req_async);
564 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
565 struct shash_desc *desc = &rctx->desc;
566
567 if (unlikely(err == -EINPROGRESS))
568 goto out;
569
570 desc->tfm = child;
571 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
572
573 err = shash_ahash_digest(req, desc);
574
575 req->base.complete = rctx->complete;
576
577out:
578 local_bh_disable();
579 rctx->complete(&req->base, err);
580 local_bh_enable();
581}
582
583static int cryptd_hash_digest_enqueue(struct ahash_request *req)
584{
585 return cryptd_hash_enqueue(req, cryptd_hash_digest);
586}
587
588static int cryptd_hash_export(struct ahash_request *req, void *out)
589{
590 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
591
592 return crypto_shash_export(&rctx->desc, out);
593}
594
595static int cryptd_hash_import(struct ahash_request *req, const void *in)
596{
597 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
598
599 return crypto_shash_import(&rctx->desc, in);
600}
601
602static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
603 struct cryptd_queue *queue)
604{
605 struct hashd_instance_ctx *ctx;
606 struct ahash_instance *inst;
607 struct shash_alg *salg;
608 struct crypto_alg *alg;
609 u32 type = 0;
610 u32 mask = 0;
611 int err;
612
613 cryptd_check_internal(tb, &type, &mask);
614
615 salg = shash_attr_alg(tb[1], type, mask);
616 if (IS_ERR(salg))
617 return PTR_ERR(salg);
618
619 alg = &salg->base;
620 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
621 sizeof(*ctx));
622 err = PTR_ERR(inst);
623 if (IS_ERR(inst))
624 goto out_put_alg;
625
626 ctx = ahash_instance_ctx(inst);
627 ctx->queue = queue;
628
629 err = crypto_init_shash_spawn(&ctx->spawn, salg,
630 ahash_crypto_instance(inst));
631 if (err)
632 goto out_free_inst;
633
634 type = CRYPTO_ALG_ASYNC;
635 if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
636 type |= CRYPTO_ALG_INTERNAL;
637 inst->alg.halg.base.cra_flags = type;
638
639 inst->alg.halg.digestsize = salg->digestsize;
640 inst->alg.halg.statesize = salg->statesize;
641 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
642
643 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
644 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
645
646 inst->alg.init = cryptd_hash_init_enqueue;
647 inst->alg.update = cryptd_hash_update_enqueue;
648 inst->alg.final = cryptd_hash_final_enqueue;
649 inst->alg.finup = cryptd_hash_finup_enqueue;
650 inst->alg.export = cryptd_hash_export;
651 inst->alg.import = cryptd_hash_import;
652 inst->alg.setkey = cryptd_hash_setkey;
653 inst->alg.digest = cryptd_hash_digest_enqueue;
654
655 err = ahash_register_instance(tmpl, inst);
656 if (err) {
657 crypto_drop_shash(&ctx->spawn);
658out_free_inst:
659 kfree(inst);
660 }
661
662out_put_alg:
663 crypto_mod_put(alg);
664 return err;
665}
666
667static int cryptd_aead_setkey(struct crypto_aead *parent,
668 const u8 *key, unsigned int keylen)
669{
670 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
671 struct crypto_aead *child = ctx->child;
672
673 return crypto_aead_setkey(child, key, keylen);
674}
675
676static int cryptd_aead_setauthsize(struct crypto_aead *parent,
677 unsigned int authsize)
678{
679 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
680 struct crypto_aead *child = ctx->child;
681
682 return crypto_aead_setauthsize(child, authsize);
683}
684
685static void cryptd_aead_crypt(struct aead_request *req,
686 struct crypto_aead *child,
687 int err,
688 int (*crypt)(struct aead_request *req))
689{
690 struct cryptd_aead_request_ctx *rctx;
691 crypto_completion_t compl;
692
693 rctx = aead_request_ctx(req);
694 compl = rctx->complete;
695
696 if (unlikely(err == -EINPROGRESS))
697 goto out;
698 aead_request_set_tfm(req, child);
699 err = crypt( req );
700out:
701 local_bh_disable();
702 compl(&req->base, err);
703 local_bh_enable();
704}
705
706static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
707{
708 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
709 struct crypto_aead *child = ctx->child;
710 struct aead_request *req;
711
712 req = container_of(areq, struct aead_request, base);
713 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
714}
715
716static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
717{
718 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
719 struct crypto_aead *child = ctx->child;
720 struct aead_request *req;
721
722 req = container_of(areq, struct aead_request, base);
723 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
724}
725
726static int cryptd_aead_enqueue(struct aead_request *req,
727 crypto_completion_t compl)
728{
729 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
730 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
731 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
732
733 rctx->complete = req->base.complete;
734 req->base.complete = compl;
735 return cryptd_enqueue_request(queue, &req->base);
736}
737
738static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
739{
740 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
741}
742
743static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
744{
745 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
746}
747
748static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
749{
750 struct aead_instance *inst = aead_alg_instance(tfm);
751 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
752 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
753 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
754 struct crypto_aead *cipher;
755
756 cipher = crypto_spawn_aead(spawn);
757 if (IS_ERR(cipher))
758 return PTR_ERR(cipher);
759
760 ctx->child = cipher;
761 crypto_aead_set_reqsize(
762 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
763 crypto_aead_reqsize(cipher)));
764 return 0;
765}
766
767static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
768{
769 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
770 crypto_free_aead(ctx->child);
771}
772
773static int cryptd_create_aead(struct crypto_template *tmpl,
774 struct rtattr **tb,
775 struct cryptd_queue *queue)
776{
777 struct aead_instance_ctx *ctx;
778 struct aead_instance *inst;
779 struct aead_alg *alg;
780 const char *name;
781 u32 type = 0;
782 u32 mask = CRYPTO_ALG_ASYNC;
783 int err;
784
785 cryptd_check_internal(tb, &type, &mask);
786
787 name = crypto_attr_alg_name(tb[1]);
788 if (IS_ERR(name))
789 return PTR_ERR(name);
790
791 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
792 if (!inst)
793 return -ENOMEM;
794
795 ctx = aead_instance_ctx(inst);
796 ctx->queue = queue;
797
798 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
799 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
800 if (err)
801 goto out_free_inst;
802
803 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
804 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
805 if (err)
806 goto out_drop_aead;
807
808 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
809 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
810 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
811
812 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
813 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
814
815 inst->alg.init = cryptd_aead_init_tfm;
816 inst->alg.exit = cryptd_aead_exit_tfm;
817 inst->alg.setkey = cryptd_aead_setkey;
818 inst->alg.setauthsize = cryptd_aead_setauthsize;
819 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
820 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
821
822 err = aead_register_instance(tmpl, inst);
823 if (err) {
824out_drop_aead:
825 crypto_drop_aead(&ctx->aead_spawn);
826out_free_inst:
827 kfree(inst);
828 }
829 return err;
830}
831
832static struct cryptd_queue queue;
833
834static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
835{
836 struct crypto_attr_type *algt;
837
838 algt = crypto_get_attr_type(tb);
839 if (IS_ERR(algt))
840 return PTR_ERR(algt);
841
842 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
843 case CRYPTO_ALG_TYPE_BLKCIPHER:
844 return cryptd_create_blkcipher(tmpl, tb, &queue);
845 case CRYPTO_ALG_TYPE_DIGEST:
846 return cryptd_create_hash(tmpl, tb, &queue);
847 case CRYPTO_ALG_TYPE_AEAD:
848 return cryptd_create_aead(tmpl, tb, &queue);
849 }
850
851 return -EINVAL;
852}
853
854static void cryptd_free(struct crypto_instance *inst)
855{
856 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
857 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
858 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
859
860 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
861 case CRYPTO_ALG_TYPE_AHASH:
862 crypto_drop_shash(&hctx->spawn);
863 kfree(ahash_instance(inst));
864 return;
865 case CRYPTO_ALG_TYPE_AEAD:
866 crypto_drop_aead(&aead_ctx->aead_spawn);
867 kfree(aead_instance(inst));
868 return;
869 default:
870 crypto_drop_spawn(&ctx->spawn);
871 kfree(inst);
872 }
873}
874
875static struct crypto_template cryptd_tmpl = {
876 .name = "cryptd",
877 .create = cryptd_create,
878 .free = cryptd_free,
879 .module = THIS_MODULE,
880};
881
882struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
883 u32 type, u32 mask)
884{
885 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
886 struct crypto_tfm *tfm;
887
888 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
889 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
890 return ERR_PTR(-EINVAL);
891 type = crypto_skcipher_type(type);
892 mask &= ~CRYPTO_ALG_TYPE_MASK;
893 mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
894 tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
895 if (IS_ERR(tfm))
896 return ERR_CAST(tfm);
897 if (tfm->__crt_alg->cra_module != THIS_MODULE) {
898 crypto_free_tfm(tfm);
899 return ERR_PTR(-EINVAL);
900 }
901
902 return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
903}
904EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
905
906struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
907{
908 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
909 return ctx->child;
910}
911EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
912
913void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
914{
915 crypto_free_ablkcipher(&tfm->base);
916}
917EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
918
919struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
920 u32 type, u32 mask)
921{
922 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
923 struct crypto_ahash *tfm;
924
925 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
926 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
927 return ERR_PTR(-EINVAL);
928 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
929 if (IS_ERR(tfm))
930 return ERR_CAST(tfm);
931 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
932 crypto_free_ahash(tfm);
933 return ERR_PTR(-EINVAL);
934 }
935
936 return __cryptd_ahash_cast(tfm);
937}
938EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
939
940struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
941{
942 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
943
944 return ctx->child;
945}
946EXPORT_SYMBOL_GPL(cryptd_ahash_child);
947
948struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
949{
950 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
951 return &rctx->desc;
952}
953EXPORT_SYMBOL_GPL(cryptd_shash_desc);
954
955void cryptd_free_ahash(struct cryptd_ahash *tfm)
956{
957 crypto_free_ahash(&tfm->base);
958}
959EXPORT_SYMBOL_GPL(cryptd_free_ahash);
960
961struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
962 u32 type, u32 mask)
963{
964 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
965 struct crypto_aead *tfm;
966
967 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
968 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
969 return ERR_PTR(-EINVAL);
970 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
971 if (IS_ERR(tfm))
972 return ERR_CAST(tfm);
973 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
974 crypto_free_aead(tfm);
975 return ERR_PTR(-EINVAL);
976 }
977 return __cryptd_aead_cast(tfm);
978}
979EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
980
981struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
982{
983 struct cryptd_aead_ctx *ctx;
984 ctx = crypto_aead_ctx(&tfm->base);
985 return ctx->child;
986}
987EXPORT_SYMBOL_GPL(cryptd_aead_child);
988
989void cryptd_free_aead(struct cryptd_aead *tfm)
990{
991 crypto_free_aead(&tfm->base);
992}
993EXPORT_SYMBOL_GPL(cryptd_free_aead);
994
995static int __init cryptd_init(void)
996{
997 int err;
998
999 err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
1000 if (err)
1001 return err;
1002
1003 err = crypto_register_template(&cryptd_tmpl);
1004 if (err)
1005 cryptd_fini_queue(&queue);
1006
1007 return err;
1008}
1009
1010static void __exit cryptd_exit(void)
1011{
1012 cryptd_fini_queue(&queue);
1013 crypto_unregister_template(&cryptd_tmpl);
1014}
1015
1016subsys_initcall(cryptd_init);
1017module_exit(cryptd_exit);
1018
1019MODULE_LICENSE("GPL");
1020MODULE_DESCRIPTION("Software async crypto daemon");
1021MODULE_ALIAS_CRYPTO("cryptd");
1/*
2 * Software async crypto daemon.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * Added AEAD support to cryptd.
7 * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
8 * Adrian Hoban <adrian.hoban@intel.com>
9 * Gabriele Paoloni <gabriele.paoloni@intel.com>
10 * Aidan O'Mahony (aidan.o.mahony@intel.com)
11 * Copyright (c) 2010, Intel Corporation.
12 *
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)
16 * any later version.
17 *
18 */
19
20#include <crypto/algapi.h>
21#include <crypto/internal/hash.h>
22#include <crypto/internal/aead.h>
23#include <crypto/cryptd.h>
24#include <crypto/crypto_wq.h>
25#include <linux/err.h>
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/list.h>
29#include <linux/module.h>
30#include <linux/scatterlist.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
33
34#define CRYPTD_MAX_CPU_QLEN 100
35
36struct cryptd_cpu_queue {
37 struct crypto_queue queue;
38 struct work_struct work;
39};
40
41struct cryptd_queue {
42 struct cryptd_cpu_queue __percpu *cpu_queue;
43};
44
45struct cryptd_instance_ctx {
46 struct crypto_spawn spawn;
47 struct cryptd_queue *queue;
48};
49
50struct hashd_instance_ctx {
51 struct crypto_shash_spawn spawn;
52 struct cryptd_queue *queue;
53};
54
55struct aead_instance_ctx {
56 struct crypto_aead_spawn aead_spawn;
57 struct cryptd_queue *queue;
58};
59
60struct cryptd_blkcipher_ctx {
61 struct crypto_blkcipher *child;
62};
63
64struct cryptd_blkcipher_request_ctx {
65 crypto_completion_t complete;
66};
67
68struct cryptd_hash_ctx {
69 struct crypto_shash *child;
70};
71
72struct cryptd_hash_request_ctx {
73 crypto_completion_t complete;
74 struct shash_desc desc;
75};
76
77struct cryptd_aead_ctx {
78 struct crypto_aead *child;
79};
80
81struct cryptd_aead_request_ctx {
82 crypto_completion_t complete;
83};
84
85static void cryptd_queue_worker(struct work_struct *work);
86
87static int cryptd_init_queue(struct cryptd_queue *queue,
88 unsigned int max_cpu_qlen)
89{
90 int cpu;
91 struct cryptd_cpu_queue *cpu_queue;
92
93 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
94 if (!queue->cpu_queue)
95 return -ENOMEM;
96 for_each_possible_cpu(cpu) {
97 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
98 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
99 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
100 }
101 return 0;
102}
103
104static void cryptd_fini_queue(struct cryptd_queue *queue)
105{
106 int cpu;
107 struct cryptd_cpu_queue *cpu_queue;
108
109 for_each_possible_cpu(cpu) {
110 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
111 BUG_ON(cpu_queue->queue.qlen);
112 }
113 free_percpu(queue->cpu_queue);
114}
115
116static int cryptd_enqueue_request(struct cryptd_queue *queue,
117 struct crypto_async_request *request)
118{
119 int cpu, err;
120 struct cryptd_cpu_queue *cpu_queue;
121
122 cpu = get_cpu();
123 cpu_queue = this_cpu_ptr(queue->cpu_queue);
124 err = crypto_enqueue_request(&cpu_queue->queue, request);
125 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
126 put_cpu();
127
128 return err;
129}
130
131/* Called in workqueue context, do one real cryption work (via
132 * req->complete) and reschedule itself if there are more work to
133 * do. */
134static void cryptd_queue_worker(struct work_struct *work)
135{
136 struct cryptd_cpu_queue *cpu_queue;
137 struct crypto_async_request *req, *backlog;
138
139 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
140 /* Only handle one request at a time to avoid hogging crypto
141 * workqueue. preempt_disable/enable is used to prevent
142 * being preempted by cryptd_enqueue_request() */
143 preempt_disable();
144 backlog = crypto_get_backlog(&cpu_queue->queue);
145 req = crypto_dequeue_request(&cpu_queue->queue);
146 preempt_enable();
147
148 if (!req)
149 return;
150
151 if (backlog)
152 backlog->complete(backlog, -EINPROGRESS);
153 req->complete(req, 0);
154
155 if (cpu_queue->queue.qlen)
156 queue_work(kcrypto_wq, &cpu_queue->work);
157}
158
159static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
160{
161 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
162 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
163 return ictx->queue;
164}
165
166static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
167 const u8 *key, unsigned int keylen)
168{
169 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
170 struct crypto_blkcipher *child = ctx->child;
171 int err;
172
173 crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
174 crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
175 CRYPTO_TFM_REQ_MASK);
176 err = crypto_blkcipher_setkey(child, key, keylen);
177 crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
178 CRYPTO_TFM_RES_MASK);
179 return err;
180}
181
182static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
183 struct crypto_blkcipher *child,
184 int err,
185 int (*crypt)(struct blkcipher_desc *desc,
186 struct scatterlist *dst,
187 struct scatterlist *src,
188 unsigned int len))
189{
190 struct cryptd_blkcipher_request_ctx *rctx;
191 struct blkcipher_desc desc;
192
193 rctx = ablkcipher_request_ctx(req);
194
195 if (unlikely(err == -EINPROGRESS))
196 goto out;
197
198 desc.tfm = child;
199 desc.info = req->info;
200 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
201
202 err = crypt(&desc, req->dst, req->src, req->nbytes);
203
204 req->base.complete = rctx->complete;
205
206out:
207 local_bh_disable();
208 rctx->complete(&req->base, err);
209 local_bh_enable();
210}
211
212static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
213{
214 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
215 struct crypto_blkcipher *child = ctx->child;
216
217 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
218 crypto_blkcipher_crt(child)->encrypt);
219}
220
221static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
222{
223 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
224 struct crypto_blkcipher *child = ctx->child;
225
226 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
227 crypto_blkcipher_crt(child)->decrypt);
228}
229
230static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
231 crypto_completion_t complete)
232{
233 struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
234 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
235 struct cryptd_queue *queue;
236
237 queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
238 rctx->complete = req->base.complete;
239 req->base.complete = complete;
240
241 return cryptd_enqueue_request(queue, &req->base);
242}
243
244static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
245{
246 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
247}
248
249static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
250{
251 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
252}
253
254static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
255{
256 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
257 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
258 struct crypto_spawn *spawn = &ictx->spawn;
259 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
260 struct crypto_blkcipher *cipher;
261
262 cipher = crypto_spawn_blkcipher(spawn);
263 if (IS_ERR(cipher))
264 return PTR_ERR(cipher);
265
266 ctx->child = cipher;
267 tfm->crt_ablkcipher.reqsize =
268 sizeof(struct cryptd_blkcipher_request_ctx);
269 return 0;
270}
271
272static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
273{
274 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
275
276 crypto_free_blkcipher(ctx->child);
277}
278
279static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
280 unsigned int tail)
281{
282 char *p;
283 struct crypto_instance *inst;
284 int err;
285
286 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
287 if (!p)
288 return ERR_PTR(-ENOMEM);
289
290 inst = (void *)(p + head);
291
292 err = -ENAMETOOLONG;
293 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
294 "cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
295 goto out_free_inst;
296
297 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
298
299 inst->alg.cra_priority = alg->cra_priority + 50;
300 inst->alg.cra_blocksize = alg->cra_blocksize;
301 inst->alg.cra_alignmask = alg->cra_alignmask;
302
303out:
304 return p;
305
306out_free_inst:
307 kfree(p);
308 p = ERR_PTR(err);
309 goto out;
310}
311
312static int cryptd_create_blkcipher(struct crypto_template *tmpl,
313 struct rtattr **tb,
314 struct cryptd_queue *queue)
315{
316 struct cryptd_instance_ctx *ctx;
317 struct crypto_instance *inst;
318 struct crypto_alg *alg;
319 int err;
320
321 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER,
322 CRYPTO_ALG_TYPE_MASK);
323 if (IS_ERR(alg))
324 return PTR_ERR(alg);
325
326 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
327 err = PTR_ERR(inst);
328 if (IS_ERR(inst))
329 goto out_put_alg;
330
331 ctx = crypto_instance_ctx(inst);
332 ctx->queue = queue;
333
334 err = crypto_init_spawn(&ctx->spawn, alg, inst,
335 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
336 if (err)
337 goto out_free_inst;
338
339 inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
340 inst->alg.cra_type = &crypto_ablkcipher_type;
341
342 inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
343 inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
344 inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
345
346 inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
347
348 inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
349
350 inst->alg.cra_init = cryptd_blkcipher_init_tfm;
351 inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
352
353 inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
354 inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
355 inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
356
357 err = crypto_register_instance(tmpl, inst);
358 if (err) {
359 crypto_drop_spawn(&ctx->spawn);
360out_free_inst:
361 kfree(inst);
362 }
363
364out_put_alg:
365 crypto_mod_put(alg);
366 return err;
367}
368
369static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
370{
371 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
372 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
373 struct crypto_shash_spawn *spawn = &ictx->spawn;
374 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
375 struct crypto_shash *hash;
376
377 hash = crypto_spawn_shash(spawn);
378 if (IS_ERR(hash))
379 return PTR_ERR(hash);
380
381 ctx->child = hash;
382 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
383 sizeof(struct cryptd_hash_request_ctx) +
384 crypto_shash_descsize(hash));
385 return 0;
386}
387
388static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
389{
390 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
391
392 crypto_free_shash(ctx->child);
393}
394
395static int cryptd_hash_setkey(struct crypto_ahash *parent,
396 const u8 *key, unsigned int keylen)
397{
398 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
399 struct crypto_shash *child = ctx->child;
400 int err;
401
402 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
403 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
404 CRYPTO_TFM_REQ_MASK);
405 err = crypto_shash_setkey(child, key, keylen);
406 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
407 CRYPTO_TFM_RES_MASK);
408 return err;
409}
410
411static int cryptd_hash_enqueue(struct ahash_request *req,
412 crypto_completion_t complete)
413{
414 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
415 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
416 struct cryptd_queue *queue =
417 cryptd_get_queue(crypto_ahash_tfm(tfm));
418
419 rctx->complete = req->base.complete;
420 req->base.complete = complete;
421
422 return cryptd_enqueue_request(queue, &req->base);
423}
424
425static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
426{
427 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
428 struct crypto_shash *child = ctx->child;
429 struct ahash_request *req = ahash_request_cast(req_async);
430 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
431 struct shash_desc *desc = &rctx->desc;
432
433 if (unlikely(err == -EINPROGRESS))
434 goto out;
435
436 desc->tfm = child;
437 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
438
439 err = crypto_shash_init(desc);
440
441 req->base.complete = rctx->complete;
442
443out:
444 local_bh_disable();
445 rctx->complete(&req->base, err);
446 local_bh_enable();
447}
448
449static int cryptd_hash_init_enqueue(struct ahash_request *req)
450{
451 return cryptd_hash_enqueue(req, cryptd_hash_init);
452}
453
454static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
455{
456 struct ahash_request *req = ahash_request_cast(req_async);
457 struct cryptd_hash_request_ctx *rctx;
458
459 rctx = ahash_request_ctx(req);
460
461 if (unlikely(err == -EINPROGRESS))
462 goto out;
463
464 err = shash_ahash_update(req, &rctx->desc);
465
466 req->base.complete = rctx->complete;
467
468out:
469 local_bh_disable();
470 rctx->complete(&req->base, err);
471 local_bh_enable();
472}
473
474static int cryptd_hash_update_enqueue(struct ahash_request *req)
475{
476 return cryptd_hash_enqueue(req, cryptd_hash_update);
477}
478
479static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
480{
481 struct ahash_request *req = ahash_request_cast(req_async);
482 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
483
484 if (unlikely(err == -EINPROGRESS))
485 goto out;
486
487 err = crypto_shash_final(&rctx->desc, req->result);
488
489 req->base.complete = rctx->complete;
490
491out:
492 local_bh_disable();
493 rctx->complete(&req->base, err);
494 local_bh_enable();
495}
496
497static int cryptd_hash_final_enqueue(struct ahash_request *req)
498{
499 return cryptd_hash_enqueue(req, cryptd_hash_final);
500}
501
502static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
503{
504 struct ahash_request *req = ahash_request_cast(req_async);
505 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
506
507 if (unlikely(err == -EINPROGRESS))
508 goto out;
509
510 err = shash_ahash_finup(req, &rctx->desc);
511
512 req->base.complete = rctx->complete;
513
514out:
515 local_bh_disable();
516 rctx->complete(&req->base, err);
517 local_bh_enable();
518}
519
520static int cryptd_hash_finup_enqueue(struct ahash_request *req)
521{
522 return cryptd_hash_enqueue(req, cryptd_hash_finup);
523}
524
525static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
526{
527 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
528 struct crypto_shash *child = ctx->child;
529 struct ahash_request *req = ahash_request_cast(req_async);
530 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
531 struct shash_desc *desc = &rctx->desc;
532
533 if (unlikely(err == -EINPROGRESS))
534 goto out;
535
536 desc->tfm = child;
537 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
538
539 err = shash_ahash_digest(req, desc);
540
541 req->base.complete = rctx->complete;
542
543out:
544 local_bh_disable();
545 rctx->complete(&req->base, err);
546 local_bh_enable();
547}
548
549static int cryptd_hash_digest_enqueue(struct ahash_request *req)
550{
551 return cryptd_hash_enqueue(req, cryptd_hash_digest);
552}
553
554static int cryptd_hash_export(struct ahash_request *req, void *out)
555{
556 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
557
558 return crypto_shash_export(&rctx->desc, out);
559}
560
561static int cryptd_hash_import(struct ahash_request *req, const void *in)
562{
563 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
564
565 return crypto_shash_import(&rctx->desc, in);
566}
567
568static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
569 struct cryptd_queue *queue)
570{
571 struct hashd_instance_ctx *ctx;
572 struct ahash_instance *inst;
573 struct shash_alg *salg;
574 struct crypto_alg *alg;
575 int err;
576
577 salg = shash_attr_alg(tb[1], 0, 0);
578 if (IS_ERR(salg))
579 return PTR_ERR(salg);
580
581 alg = &salg->base;
582 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
583 sizeof(*ctx));
584 err = PTR_ERR(inst);
585 if (IS_ERR(inst))
586 goto out_put_alg;
587
588 ctx = ahash_instance_ctx(inst);
589 ctx->queue = queue;
590
591 err = crypto_init_shash_spawn(&ctx->spawn, salg,
592 ahash_crypto_instance(inst));
593 if (err)
594 goto out_free_inst;
595
596 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC;
597
598 inst->alg.halg.digestsize = salg->digestsize;
599 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
600
601 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
602 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
603
604 inst->alg.init = cryptd_hash_init_enqueue;
605 inst->alg.update = cryptd_hash_update_enqueue;
606 inst->alg.final = cryptd_hash_final_enqueue;
607 inst->alg.finup = cryptd_hash_finup_enqueue;
608 inst->alg.export = cryptd_hash_export;
609 inst->alg.import = cryptd_hash_import;
610 inst->alg.setkey = cryptd_hash_setkey;
611 inst->alg.digest = cryptd_hash_digest_enqueue;
612
613 err = ahash_register_instance(tmpl, inst);
614 if (err) {
615 crypto_drop_shash(&ctx->spawn);
616out_free_inst:
617 kfree(inst);
618 }
619
620out_put_alg:
621 crypto_mod_put(alg);
622 return err;
623}
624
625static void cryptd_aead_crypt(struct aead_request *req,
626 struct crypto_aead *child,
627 int err,
628 int (*crypt)(struct aead_request *req))
629{
630 struct cryptd_aead_request_ctx *rctx;
631 rctx = aead_request_ctx(req);
632
633 if (unlikely(err == -EINPROGRESS))
634 goto out;
635 aead_request_set_tfm(req, child);
636 err = crypt( req );
637 req->base.complete = rctx->complete;
638out:
639 local_bh_disable();
640 rctx->complete(&req->base, err);
641 local_bh_enable();
642}
643
644static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
645{
646 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
647 struct crypto_aead *child = ctx->child;
648 struct aead_request *req;
649
650 req = container_of(areq, struct aead_request, base);
651 cryptd_aead_crypt(req, child, err, crypto_aead_crt(child)->encrypt);
652}
653
654static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
655{
656 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
657 struct crypto_aead *child = ctx->child;
658 struct aead_request *req;
659
660 req = container_of(areq, struct aead_request, base);
661 cryptd_aead_crypt(req, child, err, crypto_aead_crt(child)->decrypt);
662}
663
664static int cryptd_aead_enqueue(struct aead_request *req,
665 crypto_completion_t complete)
666{
667 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
668 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
669 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
670
671 rctx->complete = req->base.complete;
672 req->base.complete = complete;
673 return cryptd_enqueue_request(queue, &req->base);
674}
675
676static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
677{
678 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
679}
680
681static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
682{
683 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
684}
685
686static int cryptd_aead_init_tfm(struct crypto_tfm *tfm)
687{
688 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
689 struct aead_instance_ctx *ictx = crypto_instance_ctx(inst);
690 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
691 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(tfm);
692 struct crypto_aead *cipher;
693
694 cipher = crypto_spawn_aead(spawn);
695 if (IS_ERR(cipher))
696 return PTR_ERR(cipher);
697
698 crypto_aead_set_flags(cipher, CRYPTO_TFM_REQ_MAY_SLEEP);
699 ctx->child = cipher;
700 tfm->crt_aead.reqsize = sizeof(struct cryptd_aead_request_ctx);
701 return 0;
702}
703
704static void cryptd_aead_exit_tfm(struct crypto_tfm *tfm)
705{
706 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(tfm);
707 crypto_free_aead(ctx->child);
708}
709
710static int cryptd_create_aead(struct crypto_template *tmpl,
711 struct rtattr **tb,
712 struct cryptd_queue *queue)
713{
714 struct aead_instance_ctx *ctx;
715 struct crypto_instance *inst;
716 struct crypto_alg *alg;
717 int err;
718
719 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_AEAD,
720 CRYPTO_ALG_TYPE_MASK);
721 if (IS_ERR(alg))
722 return PTR_ERR(alg);
723
724 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
725 err = PTR_ERR(inst);
726 if (IS_ERR(inst))
727 goto out_put_alg;
728
729 ctx = crypto_instance_ctx(inst);
730 ctx->queue = queue;
731
732 err = crypto_init_spawn(&ctx->aead_spawn.base, alg, inst,
733 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
734 if (err)
735 goto out_free_inst;
736
737 inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
738 inst->alg.cra_type = alg->cra_type;
739 inst->alg.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
740 inst->alg.cra_init = cryptd_aead_init_tfm;
741 inst->alg.cra_exit = cryptd_aead_exit_tfm;
742 inst->alg.cra_aead.setkey = alg->cra_aead.setkey;
743 inst->alg.cra_aead.setauthsize = alg->cra_aead.setauthsize;
744 inst->alg.cra_aead.geniv = alg->cra_aead.geniv;
745 inst->alg.cra_aead.ivsize = alg->cra_aead.ivsize;
746 inst->alg.cra_aead.maxauthsize = alg->cra_aead.maxauthsize;
747 inst->alg.cra_aead.encrypt = cryptd_aead_encrypt_enqueue;
748 inst->alg.cra_aead.decrypt = cryptd_aead_decrypt_enqueue;
749 inst->alg.cra_aead.givencrypt = alg->cra_aead.givencrypt;
750 inst->alg.cra_aead.givdecrypt = alg->cra_aead.givdecrypt;
751
752 err = crypto_register_instance(tmpl, inst);
753 if (err) {
754 crypto_drop_spawn(&ctx->aead_spawn.base);
755out_free_inst:
756 kfree(inst);
757 }
758out_put_alg:
759 crypto_mod_put(alg);
760 return err;
761}
762
763static struct cryptd_queue queue;
764
765static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
766{
767 struct crypto_attr_type *algt;
768
769 algt = crypto_get_attr_type(tb);
770 if (IS_ERR(algt))
771 return PTR_ERR(algt);
772
773 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
774 case CRYPTO_ALG_TYPE_BLKCIPHER:
775 return cryptd_create_blkcipher(tmpl, tb, &queue);
776 case CRYPTO_ALG_TYPE_DIGEST:
777 return cryptd_create_hash(tmpl, tb, &queue);
778 case CRYPTO_ALG_TYPE_AEAD:
779 return cryptd_create_aead(tmpl, tb, &queue);
780 }
781
782 return -EINVAL;
783}
784
785static void cryptd_free(struct crypto_instance *inst)
786{
787 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
788 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
789 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
790
791 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
792 case CRYPTO_ALG_TYPE_AHASH:
793 crypto_drop_shash(&hctx->spawn);
794 kfree(ahash_instance(inst));
795 return;
796 case CRYPTO_ALG_TYPE_AEAD:
797 crypto_drop_spawn(&aead_ctx->aead_spawn.base);
798 kfree(inst);
799 return;
800 default:
801 crypto_drop_spawn(&ctx->spawn);
802 kfree(inst);
803 }
804}
805
806static struct crypto_template cryptd_tmpl = {
807 .name = "cryptd",
808 .create = cryptd_create,
809 .free = cryptd_free,
810 .module = THIS_MODULE,
811};
812
813struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
814 u32 type, u32 mask)
815{
816 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
817 struct crypto_tfm *tfm;
818
819 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
820 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
821 return ERR_PTR(-EINVAL);
822 type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
823 type |= CRYPTO_ALG_TYPE_BLKCIPHER;
824 mask &= ~CRYPTO_ALG_TYPE_MASK;
825 mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
826 tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
827 if (IS_ERR(tfm))
828 return ERR_CAST(tfm);
829 if (tfm->__crt_alg->cra_module != THIS_MODULE) {
830 crypto_free_tfm(tfm);
831 return ERR_PTR(-EINVAL);
832 }
833
834 return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
835}
836EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
837
838struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
839{
840 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
841 return ctx->child;
842}
843EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
844
845void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
846{
847 crypto_free_ablkcipher(&tfm->base);
848}
849EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
850
851struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
852 u32 type, u32 mask)
853{
854 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
855 struct crypto_ahash *tfm;
856
857 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
858 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
859 return ERR_PTR(-EINVAL);
860 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
861 if (IS_ERR(tfm))
862 return ERR_CAST(tfm);
863 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
864 crypto_free_ahash(tfm);
865 return ERR_PTR(-EINVAL);
866 }
867
868 return __cryptd_ahash_cast(tfm);
869}
870EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
871
872struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
873{
874 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
875
876 return ctx->child;
877}
878EXPORT_SYMBOL_GPL(cryptd_ahash_child);
879
880struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
881{
882 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
883 return &rctx->desc;
884}
885EXPORT_SYMBOL_GPL(cryptd_shash_desc);
886
887void cryptd_free_ahash(struct cryptd_ahash *tfm)
888{
889 crypto_free_ahash(&tfm->base);
890}
891EXPORT_SYMBOL_GPL(cryptd_free_ahash);
892
893struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
894 u32 type, u32 mask)
895{
896 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
897 struct crypto_aead *tfm;
898
899 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
900 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
901 return ERR_PTR(-EINVAL);
902 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
903 if (IS_ERR(tfm))
904 return ERR_CAST(tfm);
905 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
906 crypto_free_aead(tfm);
907 return ERR_PTR(-EINVAL);
908 }
909 return __cryptd_aead_cast(tfm);
910}
911EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
912
913struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
914{
915 struct cryptd_aead_ctx *ctx;
916 ctx = crypto_aead_ctx(&tfm->base);
917 return ctx->child;
918}
919EXPORT_SYMBOL_GPL(cryptd_aead_child);
920
921void cryptd_free_aead(struct cryptd_aead *tfm)
922{
923 crypto_free_aead(&tfm->base);
924}
925EXPORT_SYMBOL_GPL(cryptd_free_aead);
926
927static int __init cryptd_init(void)
928{
929 int err;
930
931 err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
932 if (err)
933 return err;
934
935 err = crypto_register_template(&cryptd_tmpl);
936 if (err)
937 cryptd_fini_queue(&queue);
938
939 return err;
940}
941
942static void __exit cryptd_exit(void)
943{
944 cryptd_fini_queue(&queue);
945 crypto_unregister_template(&cryptd_tmpl);
946}
947
948subsys_initcall(cryptd_init);
949module_exit(cryptd_exit);
950
951MODULE_LICENSE("GPL");
952MODULE_DESCRIPTION("Software async crypto daemon");