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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Software async crypto daemon.
4 *
5 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
6 *
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.
13 */
14
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>
29
30static unsigned int cryptd_max_cpu_qlen = 1000;
31module_param(cryptd_max_cpu_qlen, uint, 0);
32MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
33
34static struct workqueue_struct *cryptd_wq;
35
36struct cryptd_cpu_queue {
37 struct crypto_queue queue;
38 struct work_struct work;
39};
40
41struct cryptd_queue {
42 /*
43 * Protected by disabling BH to allow enqueueing from softinterrupt and
44 * dequeuing from kworker (cryptd_queue_worker()).
45 */
46 struct cryptd_cpu_queue __percpu *cpu_queue;
47};
48
49struct cryptd_instance_ctx {
50 struct crypto_spawn spawn;
51 struct cryptd_queue *queue;
52};
53
54struct skcipherd_instance_ctx {
55 struct crypto_skcipher_spawn spawn;
56 struct cryptd_queue *queue;
57};
58
59struct hashd_instance_ctx {
60 struct crypto_shash_spawn spawn;
61 struct cryptd_queue *queue;
62};
63
64struct aead_instance_ctx {
65 struct crypto_aead_spawn aead_spawn;
66 struct cryptd_queue *queue;
67};
68
69struct cryptd_skcipher_ctx {
70 refcount_t refcnt;
71 struct crypto_skcipher *child;
72};
73
74struct cryptd_skcipher_request_ctx {
75 struct skcipher_request req;
76};
77
78struct cryptd_hash_ctx {
79 refcount_t refcnt;
80 struct crypto_shash *child;
81};
82
83struct cryptd_hash_request_ctx {
84 crypto_completion_t complete;
85 void *data;
86 struct shash_desc desc;
87};
88
89struct cryptd_aead_ctx {
90 refcount_t refcnt;
91 struct crypto_aead *child;
92};
93
94struct cryptd_aead_request_ctx {
95 struct aead_request req;
96};
97
98static void cryptd_queue_worker(struct work_struct *work);
99
100static int cryptd_init_queue(struct cryptd_queue *queue,
101 unsigned int max_cpu_qlen)
102{
103 int cpu;
104 struct cryptd_cpu_queue *cpu_queue;
105
106 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
107 if (!queue->cpu_queue)
108 return -ENOMEM;
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);
113 }
114 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
115 return 0;
116}
117
118static void cryptd_fini_queue(struct cryptd_queue *queue)
119{
120 int cpu;
121 struct cryptd_cpu_queue *cpu_queue;
122
123 for_each_possible_cpu(cpu) {
124 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
125 BUG_ON(cpu_queue->queue.qlen);
126 }
127 free_percpu(queue->cpu_queue);
128}
129
130static int cryptd_enqueue_request(struct cryptd_queue *queue,
131 struct crypto_async_request *request)
132{
133 int err;
134 struct cryptd_cpu_queue *cpu_queue;
135 refcount_t *refcnt;
136
137 local_bh_disable();
138 cpu_queue = this_cpu_ptr(queue->cpu_queue);
139 err = crypto_enqueue_request(&cpu_queue->queue, request);
140
141 refcnt = crypto_tfm_ctx(request->tfm);
142
143 if (err == -ENOSPC)
144 goto out;
145
146 queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work);
147
148 if (!refcount_read(refcnt))
149 goto out;
150
151 refcount_inc(refcnt);
152
153out:
154 local_bh_enable();
155
156 return err;
157}
158
159/* Called in workqueue context, do one real cryption work (via
160 * req->complete) and reschedule itself if there are more work to
161 * do. */
162static void cryptd_queue_worker(struct work_struct *work)
163{
164 struct cryptd_cpu_queue *cpu_queue;
165 struct crypto_async_request *req, *backlog;
166
167 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
168 /*
169 * Only handle one request at a time to avoid hogging crypto workqueue.
170 */
171 local_bh_disable();
172 backlog = crypto_get_backlog(&cpu_queue->queue);
173 req = crypto_dequeue_request(&cpu_queue->queue);
174 local_bh_enable();
175
176 if (!req)
177 return;
178
179 if (backlog)
180 crypto_request_complete(backlog, -EINPROGRESS);
181 crypto_request_complete(req, 0);
182
183 if (cpu_queue->queue.qlen)
184 queue_work(cryptd_wq, &cpu_queue->work);
185}
186
187static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
188{
189 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
190 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
191 return ictx->queue;
192}
193
194static void cryptd_type_and_mask(struct crypto_attr_type *algt,
195 u32 *type, u32 *mask)
196{
197 /*
198 * cryptd is allowed to wrap internal algorithms, but in that case the
199 * resulting cryptd instance will be marked as internal as well.
200 */
201 *type = algt->type & CRYPTO_ALG_INTERNAL;
202 *mask = algt->mask & CRYPTO_ALG_INTERNAL;
203
204 /* No point in cryptd wrapping an algorithm that's already async. */
205 *mask |= CRYPTO_ALG_ASYNC;
206
207 *mask |= crypto_algt_inherited_mask(algt);
208}
209
210static int cryptd_init_instance(struct crypto_instance *inst,
211 struct crypto_alg *alg)
212{
213 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
214 "cryptd(%s)",
215 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
216 return -ENAMETOOLONG;
217
218 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
219
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;
223
224 return 0;
225}
226
227static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
228 const u8 *key, unsigned int keylen)
229{
230 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
231 struct crypto_skcipher *child = ctx->child;
232
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);
238}
239
240static struct skcipher_request *cryptd_skcipher_prepare(
241 struct skcipher_request *req, int err)
242{
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;
247
248 req->base.complete = subreq->base.complete;
249 req->base.data = subreq->base.data;
250
251 if (unlikely(err == -EINPROGRESS))
252 return NULL;
253
254 ctx = crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
255 child = ctx->child;
256
257 skcipher_request_set_tfm(subreq, child);
258 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
259 NULL, NULL);
260 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
261 req->iv);
262
263 return subreq;
264}
265
266static void cryptd_skcipher_complete(struct skcipher_request *req, int err,
267 crypto_completion_t complete)
268{
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);
274
275 local_bh_disable();
276 skcipher_request_complete(req, err);
277 local_bh_enable();
278
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);
286}
287
288static void cryptd_skcipher_encrypt(void *data, int err)
289{
290 struct skcipher_request *req = data;
291 struct skcipher_request *subreq;
292
293 subreq = cryptd_skcipher_prepare(req, err);
294 if (likely(subreq))
295 err = crypto_skcipher_encrypt(subreq);
296
297 cryptd_skcipher_complete(req, err, cryptd_skcipher_encrypt);
298}
299
300static void cryptd_skcipher_decrypt(void *data, int err)
301{
302 struct skcipher_request *req = data;
303 struct skcipher_request *subreq;
304
305 subreq = cryptd_skcipher_prepare(req, err);
306 if (likely(subreq))
307 err = crypto_skcipher_decrypt(subreq);
308
309 cryptd_skcipher_complete(req, err, cryptd_skcipher_decrypt);
310}
311
312static int cryptd_skcipher_enqueue(struct skcipher_request *req,
313 crypto_completion_t compl)
314{
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;
319
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;
325
326 return cryptd_enqueue_request(queue, &req->base);
327}
328
329static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
330{
331 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
332}
333
334static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
335{
336 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
337}
338
339static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
340{
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;
346
347 cipher = crypto_spawn_skcipher(spawn);
348 if (IS_ERR(cipher))
349 return PTR_ERR(cipher);
350
351 ctx->child = cipher;
352 crypto_skcipher_set_reqsize(
353 tfm, sizeof(struct cryptd_skcipher_request_ctx) +
354 crypto_skcipher_reqsize(cipher));
355 return 0;
356}
357
358static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
359{
360 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
361
362 crypto_free_skcipher(ctx->child);
363}
364
365static void cryptd_skcipher_free(struct skcipher_instance *inst)
366{
367 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
368
369 crypto_drop_skcipher(&ctx->spawn);
370 kfree(inst);
371}
372
373static int cryptd_create_skcipher(struct crypto_template *tmpl,
374 struct rtattr **tb,
375 struct crypto_attr_type *algt,
376 struct cryptd_queue *queue)
377{
378 struct skcipherd_instance_ctx *ctx;
379 struct skcipher_instance *inst;
380 struct skcipher_alg_common *alg;
381 u32 type;
382 u32 mask;
383 int err;
384
385 cryptd_type_and_mask(algt, &type, &mask);
386
387 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
388 if (!inst)
389 return -ENOMEM;
390
391 ctx = skcipher_instance_ctx(inst);
392 ctx->queue = queue;
393
394 err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
395 crypto_attr_alg_name(tb[1]), type, mask);
396 if (err)
397 goto err_free_inst;
398
399 alg = crypto_spawn_skcipher_alg_common(&ctx->spawn);
400 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
401 if (err)
402 goto err_free_inst;
403
404 inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
405 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
406 inst->alg.ivsize = alg->ivsize;
407 inst->alg.chunksize = alg->chunksize;
408 inst->alg.min_keysize = alg->min_keysize;
409 inst->alg.max_keysize = alg->max_keysize;
410
411 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
412
413 inst->alg.init = cryptd_skcipher_init_tfm;
414 inst->alg.exit = cryptd_skcipher_exit_tfm;
415
416 inst->alg.setkey = cryptd_skcipher_setkey;
417 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
418 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
419
420 inst->free = cryptd_skcipher_free;
421
422 err = skcipher_register_instance(tmpl, inst);
423 if (err) {
424err_free_inst:
425 cryptd_skcipher_free(inst);
426 }
427 return err;
428}
429
430static int cryptd_hash_init_tfm(struct crypto_ahash *tfm)
431{
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;
437
438 hash = crypto_spawn_shash(spawn);
439 if (IS_ERR(hash))
440 return PTR_ERR(hash);
441
442 ctx->child = hash;
443 crypto_ahash_set_reqsize(tfm,
444 sizeof(struct cryptd_hash_request_ctx) +
445 crypto_shash_descsize(hash));
446 return 0;
447}
448
449static int cryptd_hash_clone_tfm(struct crypto_ahash *ntfm,
450 struct crypto_ahash *tfm)
451{
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;
455
456 hash = crypto_clone_shash(ctx->child);
457 if (IS_ERR(hash))
458 return PTR_ERR(hash);
459
460 nctx->child = hash;
461 return 0;
462}
463
464static void cryptd_hash_exit_tfm(struct crypto_ahash *tfm)
465{
466 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
467
468 crypto_free_shash(ctx->child);
469}
470
471static int cryptd_hash_setkey(struct crypto_ahash *parent,
472 const u8 *key, unsigned int keylen)
473{
474 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
475 struct crypto_shash *child = ctx->child;
476
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);
481}
482
483static int cryptd_hash_enqueue(struct ahash_request *req,
484 crypto_completion_t compl)
485{
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));
490
491 rctx->complete = req->base.complete;
492 rctx->data = req->base.data;
493 req->base.complete = compl;
494 req->base.data = req;
495
496 return cryptd_enqueue_request(queue, &req->base);
497}
498
499static struct shash_desc *cryptd_hash_prepare(struct ahash_request *req,
500 int err)
501{
502 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
503
504 req->base.complete = rctx->complete;
505 req->base.data = rctx->data;
506
507 if (unlikely(err == -EINPROGRESS))
508 return NULL;
509
510 return &rctx->desc;
511}
512
513static void cryptd_hash_complete(struct ahash_request *req, int err,
514 crypto_completion_t complete)
515{
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);
519
520 local_bh_disable();
521 ahash_request_complete(req, err);
522 local_bh_enable();
523
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);
529}
530
531static void cryptd_hash_init(void *data, int err)
532{
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;
538
539 desc = cryptd_hash_prepare(req, err);
540 if (unlikely(!desc))
541 goto out;
542
543 desc->tfm = child;
544
545 err = crypto_shash_init(desc);
546
547out:
548 cryptd_hash_complete(req, err, cryptd_hash_init);
549}
550
551static int cryptd_hash_init_enqueue(struct ahash_request *req)
552{
553 return cryptd_hash_enqueue(req, cryptd_hash_init);
554}
555
556static void cryptd_hash_update(void *data, int err)
557{
558 struct ahash_request *req = data;
559 struct shash_desc *desc;
560
561 desc = cryptd_hash_prepare(req, err);
562 if (likely(desc))
563 err = shash_ahash_update(req, desc);
564
565 cryptd_hash_complete(req, err, cryptd_hash_update);
566}
567
568static int cryptd_hash_update_enqueue(struct ahash_request *req)
569{
570 return cryptd_hash_enqueue(req, cryptd_hash_update);
571}
572
573static void cryptd_hash_final(void *data, int err)
574{
575 struct ahash_request *req = data;
576 struct shash_desc *desc;
577
578 desc = cryptd_hash_prepare(req, err);
579 if (likely(desc))
580 err = crypto_shash_final(desc, req->result);
581
582 cryptd_hash_complete(req, err, cryptd_hash_final);
583}
584
585static int cryptd_hash_final_enqueue(struct ahash_request *req)
586{
587 return cryptd_hash_enqueue(req, cryptd_hash_final);
588}
589
590static void cryptd_hash_finup(void *data, int err)
591{
592 struct ahash_request *req = data;
593 struct shash_desc *desc;
594
595 desc = cryptd_hash_prepare(req, err);
596 if (likely(desc))
597 err = shash_ahash_finup(req, desc);
598
599 cryptd_hash_complete(req, err, cryptd_hash_finup);
600}
601
602static int cryptd_hash_finup_enqueue(struct ahash_request *req)
603{
604 return cryptd_hash_enqueue(req, cryptd_hash_finup);
605}
606
607static void cryptd_hash_digest(void *data, int err)
608{
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;
614
615 desc = cryptd_hash_prepare(req, err);
616 if (unlikely(!desc))
617 goto out;
618
619 desc->tfm = child;
620
621 err = shash_ahash_digest(req, desc);
622
623out:
624 cryptd_hash_complete(req, err, cryptd_hash_digest);
625}
626
627static int cryptd_hash_digest_enqueue(struct ahash_request *req)
628{
629 return cryptd_hash_enqueue(req, cryptd_hash_digest);
630}
631
632static int cryptd_hash_export(struct ahash_request *req, void *out)
633{
634 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
635
636 return crypto_shash_export(&rctx->desc, out);
637}
638
639static int cryptd_hash_import(struct ahash_request *req, const void *in)
640{
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);
644
645 desc->tfm = ctx->child;
646
647 return crypto_shash_import(desc, in);
648}
649
650static void cryptd_hash_free(struct ahash_instance *inst)
651{
652 struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst);
653
654 crypto_drop_shash(&ctx->spawn);
655 kfree(inst);
656}
657
658static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
659 struct crypto_attr_type *algt,
660 struct cryptd_queue *queue)
661{
662 struct hashd_instance_ctx *ctx;
663 struct ahash_instance *inst;
664 struct shash_alg *alg;
665 u32 type;
666 u32 mask;
667 int err;
668
669 cryptd_type_and_mask(algt, &type, &mask);
670
671 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
672 if (!inst)
673 return -ENOMEM;
674
675 ctx = ahash_instance_ctx(inst);
676 ctx->queue = queue;
677
678 err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst),
679 crypto_attr_alg_name(tb[1]), type, mask);
680 if (err)
681 goto err_free_inst;
682 alg = crypto_spawn_shash_alg(&ctx->spawn);
683
684 err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base);
685 if (err)
686 goto err_free_inst;
687
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);
694
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;
698
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;
708
709 inst->free = cryptd_hash_free;
710
711 err = ahash_register_instance(tmpl, inst);
712 if (err) {
713err_free_inst:
714 cryptd_hash_free(inst);
715 }
716 return err;
717}
718
719static int cryptd_aead_setkey(struct crypto_aead *parent,
720 const u8 *key, unsigned int keylen)
721{
722 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
723 struct crypto_aead *child = ctx->child;
724
725 return crypto_aead_setkey(child, key, keylen);
726}
727
728static int cryptd_aead_setauthsize(struct crypto_aead *parent,
729 unsigned int authsize)
730{
731 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
732 struct crypto_aead *child = ctx->child;
733
734 return crypto_aead_setauthsize(child, authsize);
735}
736
737static 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)
741{
742 struct cryptd_aead_request_ctx *rctx;
743 struct aead_request *subreq;
744 struct cryptd_aead_ctx *ctx;
745 struct crypto_aead *tfm;
746 int refcnt;
747
748 rctx = aead_request_ctx(req);
749 subreq = &rctx->req;
750 req->base.complete = subreq->base.complete;
751 req->base.data = subreq->base.data;
752
753 tfm = crypto_aead_reqtfm(req);
754
755 if (unlikely(err == -EINPROGRESS))
756 goto out;
757
758 aead_request_set_tfm(subreq, child);
759 aead_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
760 NULL, NULL);
761 aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
762 req->iv);
763 aead_request_set_ad(subreq, req->assoclen);
764
765 err = crypt(subreq);
766
767out:
768 ctx = crypto_aead_ctx(tfm);
769 refcnt = refcount_read(&ctx->refcnt);
770
771 local_bh_disable();
772 aead_request_complete(req, err);
773 local_bh_enable();
774
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);
782}
783
784static void cryptd_aead_encrypt(void *data, int err)
785{
786 struct aead_request *req = data;
787 struct cryptd_aead_ctx *ctx;
788 struct crypto_aead *child;
789
790 ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
791 child = ctx->child;
792 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt,
793 cryptd_aead_encrypt);
794}
795
796static void cryptd_aead_decrypt(void *data, int err)
797{
798 struct aead_request *req = data;
799 struct cryptd_aead_ctx *ctx;
800 struct crypto_aead *child;
801
802 ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
803 child = ctx->child;
804 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt,
805 cryptd_aead_decrypt);
806}
807
808static int cryptd_aead_enqueue(struct aead_request *req,
809 crypto_completion_t compl)
810{
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;
815
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);
821}
822
823static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
824{
825 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
826}
827
828static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
829{
830 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
831}
832
833static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
834{
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;
840
841 cipher = crypto_spawn_aead(spawn);
842 if (IS_ERR(cipher))
843 return PTR_ERR(cipher);
844
845 ctx->child = cipher;
846 crypto_aead_set_reqsize(
847 tfm, sizeof(struct cryptd_aead_request_ctx) +
848 crypto_aead_reqsize(cipher));
849 return 0;
850}
851
852static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
853{
854 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
855 crypto_free_aead(ctx->child);
856}
857
858static void cryptd_aead_free(struct aead_instance *inst)
859{
860 struct aead_instance_ctx *ctx = aead_instance_ctx(inst);
861
862 crypto_drop_aead(&ctx->aead_spawn);
863 kfree(inst);
864}
865
866static int cryptd_create_aead(struct crypto_template *tmpl,
867 struct rtattr **tb,
868 struct crypto_attr_type *algt,
869 struct cryptd_queue *queue)
870{
871 struct aead_instance_ctx *ctx;
872 struct aead_instance *inst;
873 struct aead_alg *alg;
874 u32 type;
875 u32 mask;
876 int err;
877
878 cryptd_type_and_mask(algt, &type, &mask);
879
880 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
881 if (!inst)
882 return -ENOMEM;
883
884 ctx = aead_instance_ctx(inst);
885 ctx->queue = queue;
886
887 err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
888 crypto_attr_alg_name(tb[1]), type, mask);
889 if (err)
890 goto err_free_inst;
891
892 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
893 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
894 if (err)
895 goto err_free_inst;
896
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);
900
901 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
902 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
903
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;
910
911 inst->free = cryptd_aead_free;
912
913 err = aead_register_instance(tmpl, inst);
914 if (err) {
915err_free_inst:
916 cryptd_aead_free(inst);
917 }
918 return err;
919}
920
921static struct cryptd_queue queue;
922
923static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
924{
925 struct crypto_attr_type *algt;
926
927 algt = crypto_get_attr_type(tb);
928 if (IS_ERR(algt))
929 return PTR_ERR(algt);
930
931 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
932 case CRYPTO_ALG_TYPE_LSKCIPHER:
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);
938 }
939
940 return -EINVAL;
941}
942
943static struct crypto_template cryptd_tmpl = {
944 .name = "cryptd",
945 .create = cryptd_create,
946 .module = THIS_MODULE,
947};
948
949struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
950 u32 type, u32 mask)
951{
952 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
953 struct cryptd_skcipher_ctx *ctx;
954 struct crypto_skcipher *tfm;
955
956 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
957 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
958 return ERR_PTR(-EINVAL);
959
960 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
961 if (IS_ERR(tfm))
962 return ERR_CAST(tfm);
963
964 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
965 crypto_free_skcipher(tfm);
966 return ERR_PTR(-EINVAL);
967 }
968
969 ctx = crypto_skcipher_ctx(tfm);
970 refcount_set(&ctx->refcnt, 1);
971
972 return container_of(tfm, struct cryptd_skcipher, base);
973}
974EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
975
976struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
977{
978 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
979
980 return ctx->child;
981}
982EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
983
984bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
985{
986 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
987
988 return refcount_read(&ctx->refcnt) - 1;
989}
990EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
991
992void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
993{
994 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
995
996 if (refcount_dec_and_test(&ctx->refcnt))
997 crypto_free_skcipher(&tfm->base);
998}
999EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1000
1001struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1002 u32 type, u32 mask)
1003{
1004 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1005 struct cryptd_hash_ctx *ctx;
1006 struct crypto_ahash *tfm;
1007
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);
1012 if (IS_ERR(tfm))
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);
1017 }
1018
1019 ctx = crypto_ahash_ctx(tfm);
1020 refcount_set(&ctx->refcnt, 1);
1021
1022 return __cryptd_ahash_cast(tfm);
1023}
1024EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1025
1026struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1027{
1028 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1029
1030 return ctx->child;
1031}
1032EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1033
1034struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1035{
1036 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1037 return &rctx->desc;
1038}
1039EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1040
1041bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1042{
1043 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1044
1045 return refcount_read(&ctx->refcnt) - 1;
1046}
1047EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1048
1049void cryptd_free_ahash(struct cryptd_ahash *tfm)
1050{
1051 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1052
1053 if (refcount_dec_and_test(&ctx->refcnt))
1054 crypto_free_ahash(&tfm->base);
1055}
1056EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1057
1058struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1059 u32 type, u32 mask)
1060{
1061 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1062 struct cryptd_aead_ctx *ctx;
1063 struct crypto_aead *tfm;
1064
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);
1069 if (IS_ERR(tfm))
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);
1074 }
1075
1076 ctx = crypto_aead_ctx(tfm);
1077 refcount_set(&ctx->refcnt, 1);
1078
1079 return __cryptd_aead_cast(tfm);
1080}
1081EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1082
1083struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1084{
1085 struct cryptd_aead_ctx *ctx;
1086 ctx = crypto_aead_ctx(&tfm->base);
1087 return ctx->child;
1088}
1089EXPORT_SYMBOL_GPL(cryptd_aead_child);
1090
1091bool cryptd_aead_queued(struct cryptd_aead *tfm)
1092{
1093 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1094
1095 return refcount_read(&ctx->refcnt) - 1;
1096}
1097EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1098
1099void cryptd_free_aead(struct cryptd_aead *tfm)
1100{
1101 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1102
1103 if (refcount_dec_and_test(&ctx->refcnt))
1104 crypto_free_aead(&tfm->base);
1105}
1106EXPORT_SYMBOL_GPL(cryptd_free_aead);
1107
1108static int __init cryptd_init(void)
1109{
1110 int err;
1111
1112 cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1113 1);
1114 if (!cryptd_wq)
1115 return -ENOMEM;
1116
1117 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1118 if (err)
1119 goto err_destroy_wq;
1120
1121 err = crypto_register_template(&cryptd_tmpl);
1122 if (err)
1123 goto err_fini_queue;
1124
1125 return 0;
1126
1127err_fini_queue:
1128 cryptd_fini_queue(&queue);
1129err_destroy_wq:
1130 destroy_workqueue(cryptd_wq);
1131 return err;
1132}
1133
1134static void __exit cryptd_exit(void)
1135{
1136 destroy_workqueue(cryptd_wq);
1137 cryptd_fini_queue(&queue);
1138 crypto_unregister_template(&cryptd_tmpl);
1139}
1140
1141subsys_initcall(cryptd_init);
1142module_exit(cryptd_exit);
1143
1144MODULE_LICENSE("GPL");
1145MODULE_DESCRIPTION("Software async crypto daemon");
1146MODULE_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");