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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/internal/hash.h>
21#include <crypto/internal/aead.h>
22#include <crypto/internal/skcipher.h>
23#include <crypto/cryptd.h>
24#include <crypto/crypto_wq.h>
25#include <linux/atomic.h>
26#include <linux/err.h>
27#include <linux/init.h>
28#include <linux/kernel.h>
29#include <linux/list.h>
30#include <linux/module.h>
31#include <linux/scatterlist.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
34
35#define CRYPTD_MAX_CPU_QLEN 1000
36
37struct cryptd_cpu_queue {
38 struct crypto_queue queue;
39 struct work_struct work;
40};
41
42struct cryptd_queue {
43 struct cryptd_cpu_queue __percpu *cpu_queue;
44};
45
46struct cryptd_instance_ctx {
47 struct crypto_spawn spawn;
48 struct cryptd_queue *queue;
49};
50
51struct skcipherd_instance_ctx {
52 struct crypto_skcipher_spawn spawn;
53 struct cryptd_queue *queue;
54};
55
56struct hashd_instance_ctx {
57 struct crypto_shash_spawn spawn;
58 struct cryptd_queue *queue;
59};
60
61struct aead_instance_ctx {
62 struct crypto_aead_spawn aead_spawn;
63 struct cryptd_queue *queue;
64};
65
66struct cryptd_blkcipher_ctx {
67 atomic_t refcnt;
68 struct crypto_blkcipher *child;
69};
70
71struct cryptd_blkcipher_request_ctx {
72 crypto_completion_t complete;
73};
74
75struct cryptd_skcipher_ctx {
76 atomic_t refcnt;
77 struct crypto_skcipher *child;
78};
79
80struct cryptd_skcipher_request_ctx {
81 crypto_completion_t complete;
82};
83
84struct cryptd_hash_ctx {
85 atomic_t refcnt;
86 struct crypto_shash *child;
87};
88
89struct cryptd_hash_request_ctx {
90 crypto_completion_t complete;
91 struct shash_desc desc;
92};
93
94struct cryptd_aead_ctx {
95 atomic_t refcnt;
96 struct crypto_aead *child;
97};
98
99struct cryptd_aead_request_ctx {
100 crypto_completion_t complete;
101};
102
103static void cryptd_queue_worker(struct work_struct *work);
104
105static int cryptd_init_queue(struct cryptd_queue *queue,
106 unsigned int max_cpu_qlen)
107{
108 int cpu;
109 struct cryptd_cpu_queue *cpu_queue;
110
111 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
112 if (!queue->cpu_queue)
113 return -ENOMEM;
114 for_each_possible_cpu(cpu) {
115 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
116 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
117 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
118 }
119 return 0;
120}
121
122static void cryptd_fini_queue(struct cryptd_queue *queue)
123{
124 int cpu;
125 struct cryptd_cpu_queue *cpu_queue;
126
127 for_each_possible_cpu(cpu) {
128 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
129 BUG_ON(cpu_queue->queue.qlen);
130 }
131 free_percpu(queue->cpu_queue);
132}
133
134static int cryptd_enqueue_request(struct cryptd_queue *queue,
135 struct crypto_async_request *request)
136{
137 int cpu, err;
138 struct cryptd_cpu_queue *cpu_queue;
139 atomic_t *refcnt;
140 bool may_backlog;
141
142 cpu = get_cpu();
143 cpu_queue = this_cpu_ptr(queue->cpu_queue);
144 err = crypto_enqueue_request(&cpu_queue->queue, request);
145
146 refcnt = crypto_tfm_ctx(request->tfm);
147 may_backlog = request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG;
148
149 if (err == -EBUSY && !may_backlog)
150 goto out_put_cpu;
151
152 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
153
154 if (!atomic_read(refcnt))
155 goto out_put_cpu;
156
157 atomic_inc(refcnt);
158
159out_put_cpu:
160 put_cpu();
161
162 return err;
163}
164
165/* Called in workqueue context, do one real cryption work (via
166 * req->complete) and reschedule itself if there are more work to
167 * do. */
168static void cryptd_queue_worker(struct work_struct *work)
169{
170 struct cryptd_cpu_queue *cpu_queue;
171 struct crypto_async_request *req, *backlog;
172
173 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
174 /*
175 * Only handle one request at a time to avoid hogging crypto workqueue.
176 * preempt_disable/enable is used to prevent being preempted by
177 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
178 * cryptd_enqueue_request() being accessed from software interrupts.
179 */
180 local_bh_disable();
181 preempt_disable();
182 backlog = crypto_get_backlog(&cpu_queue->queue);
183 req = crypto_dequeue_request(&cpu_queue->queue);
184 preempt_enable();
185 local_bh_enable();
186
187 if (!req)
188 return;
189
190 if (backlog)
191 backlog->complete(backlog, -EINPROGRESS);
192 req->complete(req, 0);
193
194 if (cpu_queue->queue.qlen)
195 queue_work(kcrypto_wq, &cpu_queue->work);
196}
197
198static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
199{
200 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
201 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
202 return ictx->queue;
203}
204
205static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
206 u32 *mask)
207{
208 struct crypto_attr_type *algt;
209
210 algt = crypto_get_attr_type(tb);
211 if (IS_ERR(algt))
212 return;
213
214 *type |= algt->type & CRYPTO_ALG_INTERNAL;
215 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
216}
217
218static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
219 const u8 *key, unsigned int keylen)
220{
221 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
222 struct crypto_blkcipher *child = ctx->child;
223 int err;
224
225 crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
226 crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
227 CRYPTO_TFM_REQ_MASK);
228 err = crypto_blkcipher_setkey(child, key, keylen);
229 crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
230 CRYPTO_TFM_RES_MASK);
231 return err;
232}
233
234static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
235 struct crypto_blkcipher *child,
236 int err,
237 int (*crypt)(struct blkcipher_desc *desc,
238 struct scatterlist *dst,
239 struct scatterlist *src,
240 unsigned int len))
241{
242 struct cryptd_blkcipher_request_ctx *rctx;
243 struct cryptd_blkcipher_ctx *ctx;
244 struct crypto_ablkcipher *tfm;
245 struct blkcipher_desc desc;
246 int refcnt;
247
248 rctx = ablkcipher_request_ctx(req);
249
250 if (unlikely(err == -EINPROGRESS))
251 goto out;
252
253 desc.tfm = child;
254 desc.info = req->info;
255 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
256
257 err = crypt(&desc, req->dst, req->src, req->nbytes);
258
259 req->base.complete = rctx->complete;
260
261out:
262 tfm = crypto_ablkcipher_reqtfm(req);
263 ctx = crypto_ablkcipher_ctx(tfm);
264 refcnt = atomic_read(&ctx->refcnt);
265
266 local_bh_disable();
267 rctx->complete(&req->base, err);
268 local_bh_enable();
269
270 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
271 crypto_free_ablkcipher(tfm);
272}
273
274static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
275{
276 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
277 struct crypto_blkcipher *child = ctx->child;
278
279 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
280 crypto_blkcipher_crt(child)->encrypt);
281}
282
283static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
284{
285 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
286 struct crypto_blkcipher *child = ctx->child;
287
288 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
289 crypto_blkcipher_crt(child)->decrypt);
290}
291
292static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
293 crypto_completion_t compl)
294{
295 struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
296 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
297 struct cryptd_queue *queue;
298
299 queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
300 rctx->complete = req->base.complete;
301 req->base.complete = compl;
302
303 return cryptd_enqueue_request(queue, &req->base);
304}
305
306static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
307{
308 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
309}
310
311static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
312{
313 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
314}
315
316static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
317{
318 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
319 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
320 struct crypto_spawn *spawn = &ictx->spawn;
321 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
322 struct crypto_blkcipher *cipher;
323
324 cipher = crypto_spawn_blkcipher(spawn);
325 if (IS_ERR(cipher))
326 return PTR_ERR(cipher);
327
328 ctx->child = cipher;
329 tfm->crt_ablkcipher.reqsize =
330 sizeof(struct cryptd_blkcipher_request_ctx);
331 return 0;
332}
333
334static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
335{
336 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
337
338 crypto_free_blkcipher(ctx->child);
339}
340
341static int cryptd_init_instance(struct crypto_instance *inst,
342 struct crypto_alg *alg)
343{
344 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
345 "cryptd(%s)",
346 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
347 return -ENAMETOOLONG;
348
349 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
350
351 inst->alg.cra_priority = alg->cra_priority + 50;
352 inst->alg.cra_blocksize = alg->cra_blocksize;
353 inst->alg.cra_alignmask = alg->cra_alignmask;
354
355 return 0;
356}
357
358static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
359 unsigned int tail)
360{
361 char *p;
362 struct crypto_instance *inst;
363 int err;
364
365 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
366 if (!p)
367 return ERR_PTR(-ENOMEM);
368
369 inst = (void *)(p + head);
370
371 err = cryptd_init_instance(inst, alg);
372 if (err)
373 goto out_free_inst;
374
375out:
376 return p;
377
378out_free_inst:
379 kfree(p);
380 p = ERR_PTR(err);
381 goto out;
382}
383
384static int cryptd_create_blkcipher(struct crypto_template *tmpl,
385 struct rtattr **tb,
386 struct cryptd_queue *queue)
387{
388 struct cryptd_instance_ctx *ctx;
389 struct crypto_instance *inst;
390 struct crypto_alg *alg;
391 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
392 u32 mask = CRYPTO_ALG_TYPE_MASK;
393 int err;
394
395 cryptd_check_internal(tb, &type, &mask);
396
397 alg = crypto_get_attr_alg(tb, type, mask);
398 if (IS_ERR(alg))
399 return PTR_ERR(alg);
400
401 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
402 err = PTR_ERR(inst);
403 if (IS_ERR(inst))
404 goto out_put_alg;
405
406 ctx = crypto_instance_ctx(inst);
407 ctx->queue = queue;
408
409 err = crypto_init_spawn(&ctx->spawn, alg, inst,
410 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
411 if (err)
412 goto out_free_inst;
413
414 type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
415 if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
416 type |= CRYPTO_ALG_INTERNAL;
417 inst->alg.cra_flags = type;
418 inst->alg.cra_type = &crypto_ablkcipher_type;
419
420 inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
421 inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
422 inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
423
424 inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
425
426 inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
427
428 inst->alg.cra_init = cryptd_blkcipher_init_tfm;
429 inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
430
431 inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
432 inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
433 inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
434
435 err = crypto_register_instance(tmpl, inst);
436 if (err) {
437 crypto_drop_spawn(&ctx->spawn);
438out_free_inst:
439 kfree(inst);
440 }
441
442out_put_alg:
443 crypto_mod_put(alg);
444 return err;
445}
446
447static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
448 const u8 *key, unsigned int keylen)
449{
450 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
451 struct crypto_skcipher *child = ctx->child;
452 int err;
453
454 crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
455 crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
456 CRYPTO_TFM_REQ_MASK);
457 err = crypto_skcipher_setkey(child, key, keylen);
458 crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) &
459 CRYPTO_TFM_RES_MASK);
460 return err;
461}
462
463static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
464{
465 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
466 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
467 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
468 int refcnt = atomic_read(&ctx->refcnt);
469
470 local_bh_disable();
471 rctx->complete(&req->base, err);
472 local_bh_enable();
473
474 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
475 crypto_free_skcipher(tfm);
476}
477
478static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
479 int err)
480{
481 struct skcipher_request *req = skcipher_request_cast(base);
482 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
483 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
484 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
485 struct crypto_skcipher *child = ctx->child;
486 SKCIPHER_REQUEST_ON_STACK(subreq, child);
487
488 if (unlikely(err == -EINPROGRESS))
489 goto out;
490
491 skcipher_request_set_tfm(subreq, child);
492 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
493 NULL, NULL);
494 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
495 req->iv);
496
497 err = crypto_skcipher_encrypt(subreq);
498 skcipher_request_zero(subreq);
499
500 req->base.complete = rctx->complete;
501
502out:
503 cryptd_skcipher_complete(req, err);
504}
505
506static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
507 int err)
508{
509 struct skcipher_request *req = skcipher_request_cast(base);
510 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
511 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
512 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
513 struct crypto_skcipher *child = ctx->child;
514 SKCIPHER_REQUEST_ON_STACK(subreq, child);
515
516 if (unlikely(err == -EINPROGRESS))
517 goto out;
518
519 skcipher_request_set_tfm(subreq, child);
520 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
521 NULL, NULL);
522 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
523 req->iv);
524
525 err = crypto_skcipher_decrypt(subreq);
526 skcipher_request_zero(subreq);
527
528 req->base.complete = rctx->complete;
529
530out:
531 cryptd_skcipher_complete(req, err);
532}
533
534static int cryptd_skcipher_enqueue(struct skcipher_request *req,
535 crypto_completion_t compl)
536{
537 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
538 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
539 struct cryptd_queue *queue;
540
541 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
542 rctx->complete = req->base.complete;
543 req->base.complete = compl;
544
545 return cryptd_enqueue_request(queue, &req->base);
546}
547
548static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
549{
550 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
551}
552
553static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
554{
555 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
556}
557
558static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
559{
560 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
561 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
562 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
563 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
564 struct crypto_skcipher *cipher;
565
566 cipher = crypto_spawn_skcipher(spawn);
567 if (IS_ERR(cipher))
568 return PTR_ERR(cipher);
569
570 ctx->child = cipher;
571 crypto_skcipher_set_reqsize(
572 tfm, sizeof(struct cryptd_skcipher_request_ctx));
573 return 0;
574}
575
576static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
577{
578 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
579
580 crypto_free_skcipher(ctx->child);
581}
582
583static void cryptd_skcipher_free(struct skcipher_instance *inst)
584{
585 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
586
587 crypto_drop_skcipher(&ctx->spawn);
588}
589
590static int cryptd_create_skcipher(struct crypto_template *tmpl,
591 struct rtattr **tb,
592 struct cryptd_queue *queue)
593{
594 struct skcipherd_instance_ctx *ctx;
595 struct skcipher_instance *inst;
596 struct skcipher_alg *alg;
597 const char *name;
598 u32 type;
599 u32 mask;
600 int err;
601
602 type = 0;
603 mask = CRYPTO_ALG_ASYNC;
604
605 cryptd_check_internal(tb, &type, &mask);
606
607 name = crypto_attr_alg_name(tb[1]);
608 if (IS_ERR(name))
609 return PTR_ERR(name);
610
611 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
612 if (!inst)
613 return -ENOMEM;
614
615 ctx = skcipher_instance_ctx(inst);
616 ctx->queue = queue;
617
618 crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
619 err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
620 if (err)
621 goto out_free_inst;
622
623 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
624 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
625 if (err)
626 goto out_drop_skcipher;
627
628 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
629 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
630
631 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
632 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
633 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
634 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
635
636 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
637
638 inst->alg.init = cryptd_skcipher_init_tfm;
639 inst->alg.exit = cryptd_skcipher_exit_tfm;
640
641 inst->alg.setkey = cryptd_skcipher_setkey;
642 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
643 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
644
645 inst->free = cryptd_skcipher_free;
646
647 err = skcipher_register_instance(tmpl, inst);
648 if (err) {
649out_drop_skcipher:
650 crypto_drop_skcipher(&ctx->spawn);
651out_free_inst:
652 kfree(inst);
653 }
654 return err;
655}
656
657static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
658{
659 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
660 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
661 struct crypto_shash_spawn *spawn = &ictx->spawn;
662 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
663 struct crypto_shash *hash;
664
665 hash = crypto_spawn_shash(spawn);
666 if (IS_ERR(hash))
667 return PTR_ERR(hash);
668
669 ctx->child = hash;
670 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
671 sizeof(struct cryptd_hash_request_ctx) +
672 crypto_shash_descsize(hash));
673 return 0;
674}
675
676static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
677{
678 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
679
680 crypto_free_shash(ctx->child);
681}
682
683static int cryptd_hash_setkey(struct crypto_ahash *parent,
684 const u8 *key, unsigned int keylen)
685{
686 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
687 struct crypto_shash *child = ctx->child;
688 int err;
689
690 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
691 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
692 CRYPTO_TFM_REQ_MASK);
693 err = crypto_shash_setkey(child, key, keylen);
694 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
695 CRYPTO_TFM_RES_MASK);
696 return err;
697}
698
699static int cryptd_hash_enqueue(struct ahash_request *req,
700 crypto_completion_t compl)
701{
702 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
703 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
704 struct cryptd_queue *queue =
705 cryptd_get_queue(crypto_ahash_tfm(tfm));
706
707 rctx->complete = req->base.complete;
708 req->base.complete = compl;
709
710 return cryptd_enqueue_request(queue, &req->base);
711}
712
713static void cryptd_hash_complete(struct ahash_request *req, int err)
714{
715 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
716 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
717 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
718 int refcnt = atomic_read(&ctx->refcnt);
719
720 local_bh_disable();
721 rctx->complete(&req->base, err);
722 local_bh_enable();
723
724 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
725 crypto_free_ahash(tfm);
726}
727
728static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
729{
730 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
731 struct crypto_shash *child = ctx->child;
732 struct ahash_request *req = ahash_request_cast(req_async);
733 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
734 struct shash_desc *desc = &rctx->desc;
735
736 if (unlikely(err == -EINPROGRESS))
737 goto out;
738
739 desc->tfm = child;
740 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
741
742 err = crypto_shash_init(desc);
743
744 req->base.complete = rctx->complete;
745
746out:
747 cryptd_hash_complete(req, err);
748}
749
750static int cryptd_hash_init_enqueue(struct ahash_request *req)
751{
752 return cryptd_hash_enqueue(req, cryptd_hash_init);
753}
754
755static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
756{
757 struct ahash_request *req = ahash_request_cast(req_async);
758 struct cryptd_hash_request_ctx *rctx;
759
760 rctx = ahash_request_ctx(req);
761
762 if (unlikely(err == -EINPROGRESS))
763 goto out;
764
765 err = shash_ahash_update(req, &rctx->desc);
766
767 req->base.complete = rctx->complete;
768
769out:
770 cryptd_hash_complete(req, err);
771}
772
773static int cryptd_hash_update_enqueue(struct ahash_request *req)
774{
775 return cryptd_hash_enqueue(req, cryptd_hash_update);
776}
777
778static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
779{
780 struct ahash_request *req = ahash_request_cast(req_async);
781 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
782
783 if (unlikely(err == -EINPROGRESS))
784 goto out;
785
786 err = crypto_shash_final(&rctx->desc, req->result);
787
788 req->base.complete = rctx->complete;
789
790out:
791 cryptd_hash_complete(req, err);
792}
793
794static int cryptd_hash_final_enqueue(struct ahash_request *req)
795{
796 return cryptd_hash_enqueue(req, cryptd_hash_final);
797}
798
799static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
800{
801 struct ahash_request *req = ahash_request_cast(req_async);
802 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
803
804 if (unlikely(err == -EINPROGRESS))
805 goto out;
806
807 err = shash_ahash_finup(req, &rctx->desc);
808
809 req->base.complete = rctx->complete;
810
811out:
812 cryptd_hash_complete(req, err);
813}
814
815static int cryptd_hash_finup_enqueue(struct ahash_request *req)
816{
817 return cryptd_hash_enqueue(req, cryptd_hash_finup);
818}
819
820static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
821{
822 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
823 struct crypto_shash *child = ctx->child;
824 struct ahash_request *req = ahash_request_cast(req_async);
825 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
826 struct shash_desc *desc = &rctx->desc;
827
828 if (unlikely(err == -EINPROGRESS))
829 goto out;
830
831 desc->tfm = child;
832 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
833
834 err = shash_ahash_digest(req, desc);
835
836 req->base.complete = rctx->complete;
837
838out:
839 cryptd_hash_complete(req, err);
840}
841
842static int cryptd_hash_digest_enqueue(struct ahash_request *req)
843{
844 return cryptd_hash_enqueue(req, cryptd_hash_digest);
845}
846
847static int cryptd_hash_export(struct ahash_request *req, void *out)
848{
849 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
850
851 return crypto_shash_export(&rctx->desc, out);
852}
853
854static int cryptd_hash_import(struct ahash_request *req, const void *in)
855{
856 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
857 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
858 struct shash_desc *desc = cryptd_shash_desc(req);
859
860 desc->tfm = ctx->child;
861 desc->flags = req->base.flags;
862
863 return crypto_shash_import(desc, in);
864}
865
866static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
867 struct cryptd_queue *queue)
868{
869 struct hashd_instance_ctx *ctx;
870 struct ahash_instance *inst;
871 struct shash_alg *salg;
872 struct crypto_alg *alg;
873 u32 type = 0;
874 u32 mask = 0;
875 int err;
876
877 cryptd_check_internal(tb, &type, &mask);
878
879 salg = shash_attr_alg(tb[1], type, mask);
880 if (IS_ERR(salg))
881 return PTR_ERR(salg);
882
883 alg = &salg->base;
884 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
885 sizeof(*ctx));
886 err = PTR_ERR(inst);
887 if (IS_ERR(inst))
888 goto out_put_alg;
889
890 ctx = ahash_instance_ctx(inst);
891 ctx->queue = queue;
892
893 err = crypto_init_shash_spawn(&ctx->spawn, salg,
894 ahash_crypto_instance(inst));
895 if (err)
896 goto out_free_inst;
897
898 type = CRYPTO_ALG_ASYNC;
899 if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
900 type |= CRYPTO_ALG_INTERNAL;
901 inst->alg.halg.base.cra_flags = type;
902
903 inst->alg.halg.digestsize = salg->digestsize;
904 inst->alg.halg.statesize = salg->statesize;
905 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
906
907 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
908 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
909
910 inst->alg.init = cryptd_hash_init_enqueue;
911 inst->alg.update = cryptd_hash_update_enqueue;
912 inst->alg.final = cryptd_hash_final_enqueue;
913 inst->alg.finup = cryptd_hash_finup_enqueue;
914 inst->alg.export = cryptd_hash_export;
915 inst->alg.import = cryptd_hash_import;
916 inst->alg.setkey = cryptd_hash_setkey;
917 inst->alg.digest = cryptd_hash_digest_enqueue;
918
919 err = ahash_register_instance(tmpl, inst);
920 if (err) {
921 crypto_drop_shash(&ctx->spawn);
922out_free_inst:
923 kfree(inst);
924 }
925
926out_put_alg:
927 crypto_mod_put(alg);
928 return err;
929}
930
931static int cryptd_aead_setkey(struct crypto_aead *parent,
932 const u8 *key, unsigned int keylen)
933{
934 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
935 struct crypto_aead *child = ctx->child;
936
937 return crypto_aead_setkey(child, key, keylen);
938}
939
940static int cryptd_aead_setauthsize(struct crypto_aead *parent,
941 unsigned int authsize)
942{
943 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
944 struct crypto_aead *child = ctx->child;
945
946 return crypto_aead_setauthsize(child, authsize);
947}
948
949static void cryptd_aead_crypt(struct aead_request *req,
950 struct crypto_aead *child,
951 int err,
952 int (*crypt)(struct aead_request *req))
953{
954 struct cryptd_aead_request_ctx *rctx;
955 struct cryptd_aead_ctx *ctx;
956 crypto_completion_t compl;
957 struct crypto_aead *tfm;
958 int refcnt;
959
960 rctx = aead_request_ctx(req);
961 compl = rctx->complete;
962
963 tfm = crypto_aead_reqtfm(req);
964
965 if (unlikely(err == -EINPROGRESS))
966 goto out;
967 aead_request_set_tfm(req, child);
968 err = crypt( req );
969
970out:
971 ctx = crypto_aead_ctx(tfm);
972 refcnt = atomic_read(&ctx->refcnt);
973
974 local_bh_disable();
975 compl(&req->base, err);
976 local_bh_enable();
977
978 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
979 crypto_free_aead(tfm);
980}
981
982static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
983{
984 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
985 struct crypto_aead *child = ctx->child;
986 struct aead_request *req;
987
988 req = container_of(areq, struct aead_request, base);
989 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
990}
991
992static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
993{
994 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
995 struct crypto_aead *child = ctx->child;
996 struct aead_request *req;
997
998 req = container_of(areq, struct aead_request, base);
999 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
1000}
1001
1002static int cryptd_aead_enqueue(struct aead_request *req,
1003 crypto_completion_t compl)
1004{
1005 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
1006 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1007 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
1008
1009 rctx->complete = req->base.complete;
1010 req->base.complete = compl;
1011 return cryptd_enqueue_request(queue, &req->base);
1012}
1013
1014static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
1015{
1016 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
1017}
1018
1019static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
1020{
1021 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
1022}
1023
1024static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
1025{
1026 struct aead_instance *inst = aead_alg_instance(tfm);
1027 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
1028 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
1029 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
1030 struct crypto_aead *cipher;
1031
1032 cipher = crypto_spawn_aead(spawn);
1033 if (IS_ERR(cipher))
1034 return PTR_ERR(cipher);
1035
1036 ctx->child = cipher;
1037 crypto_aead_set_reqsize(
1038 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
1039 crypto_aead_reqsize(cipher)));
1040 return 0;
1041}
1042
1043static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
1044{
1045 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
1046 crypto_free_aead(ctx->child);
1047}
1048
1049static int cryptd_create_aead(struct crypto_template *tmpl,
1050 struct rtattr **tb,
1051 struct cryptd_queue *queue)
1052{
1053 struct aead_instance_ctx *ctx;
1054 struct aead_instance *inst;
1055 struct aead_alg *alg;
1056 const char *name;
1057 u32 type = 0;
1058 u32 mask = CRYPTO_ALG_ASYNC;
1059 int err;
1060
1061 cryptd_check_internal(tb, &type, &mask);
1062
1063 name = crypto_attr_alg_name(tb[1]);
1064 if (IS_ERR(name))
1065 return PTR_ERR(name);
1066
1067 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
1068 if (!inst)
1069 return -ENOMEM;
1070
1071 ctx = aead_instance_ctx(inst);
1072 ctx->queue = queue;
1073
1074 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
1075 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
1076 if (err)
1077 goto out_free_inst;
1078
1079 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
1080 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
1081 if (err)
1082 goto out_drop_aead;
1083
1084 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
1085 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
1086 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
1087
1088 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
1089 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
1090
1091 inst->alg.init = cryptd_aead_init_tfm;
1092 inst->alg.exit = cryptd_aead_exit_tfm;
1093 inst->alg.setkey = cryptd_aead_setkey;
1094 inst->alg.setauthsize = cryptd_aead_setauthsize;
1095 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
1096 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
1097
1098 err = aead_register_instance(tmpl, inst);
1099 if (err) {
1100out_drop_aead:
1101 crypto_drop_aead(&ctx->aead_spawn);
1102out_free_inst:
1103 kfree(inst);
1104 }
1105 return err;
1106}
1107
1108static struct cryptd_queue queue;
1109
1110static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
1111{
1112 struct crypto_attr_type *algt;
1113
1114 algt = crypto_get_attr_type(tb);
1115 if (IS_ERR(algt))
1116 return PTR_ERR(algt);
1117
1118 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
1119 case CRYPTO_ALG_TYPE_BLKCIPHER:
1120 if ((algt->type & CRYPTO_ALG_TYPE_MASK) ==
1121 CRYPTO_ALG_TYPE_BLKCIPHER)
1122 return cryptd_create_blkcipher(tmpl, tb, &queue);
1123
1124 return cryptd_create_skcipher(tmpl, tb, &queue);
1125 case CRYPTO_ALG_TYPE_DIGEST:
1126 return cryptd_create_hash(tmpl, tb, &queue);
1127 case CRYPTO_ALG_TYPE_AEAD:
1128 return cryptd_create_aead(tmpl, tb, &queue);
1129 }
1130
1131 return -EINVAL;
1132}
1133
1134static void cryptd_free(struct crypto_instance *inst)
1135{
1136 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
1137 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
1138 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
1139
1140 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
1141 case CRYPTO_ALG_TYPE_AHASH:
1142 crypto_drop_shash(&hctx->spawn);
1143 kfree(ahash_instance(inst));
1144 return;
1145 case CRYPTO_ALG_TYPE_AEAD:
1146 crypto_drop_aead(&aead_ctx->aead_spawn);
1147 kfree(aead_instance(inst));
1148 return;
1149 default:
1150 crypto_drop_spawn(&ctx->spawn);
1151 kfree(inst);
1152 }
1153}
1154
1155static struct crypto_template cryptd_tmpl = {
1156 .name = "cryptd",
1157 .create = cryptd_create,
1158 .free = cryptd_free,
1159 .module = THIS_MODULE,
1160};
1161
1162struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
1163 u32 type, u32 mask)
1164{
1165 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1166 struct cryptd_blkcipher_ctx *ctx;
1167 struct crypto_tfm *tfm;
1168
1169 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1170 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1171 return ERR_PTR(-EINVAL);
1172 type = crypto_skcipher_type(type);
1173 mask &= ~CRYPTO_ALG_TYPE_MASK;
1174 mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
1175 tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
1176 if (IS_ERR(tfm))
1177 return ERR_CAST(tfm);
1178 if (tfm->__crt_alg->cra_module != THIS_MODULE) {
1179 crypto_free_tfm(tfm);
1180 return ERR_PTR(-EINVAL);
1181 }
1182
1183 ctx = crypto_tfm_ctx(tfm);
1184 atomic_set(&ctx->refcnt, 1);
1185
1186 return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
1187}
1188EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
1189
1190struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
1191{
1192 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1193 return ctx->child;
1194}
1195EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
1196
1197bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm)
1198{
1199 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1200
1201 return atomic_read(&ctx->refcnt) - 1;
1202}
1203EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued);
1204
1205void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
1206{
1207 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1208
1209 if (atomic_dec_and_test(&ctx->refcnt))
1210 crypto_free_ablkcipher(&tfm->base);
1211}
1212EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
1213
1214struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
1215 u32 type, u32 mask)
1216{
1217 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1218 struct cryptd_skcipher_ctx *ctx;
1219 struct crypto_skcipher *tfm;
1220
1221 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1222 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1223 return ERR_PTR(-EINVAL);
1224
1225 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
1226 if (IS_ERR(tfm))
1227 return ERR_CAST(tfm);
1228
1229 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1230 crypto_free_skcipher(tfm);
1231 return ERR_PTR(-EINVAL);
1232 }
1233
1234 ctx = crypto_skcipher_ctx(tfm);
1235 atomic_set(&ctx->refcnt, 1);
1236
1237 return container_of(tfm, struct cryptd_skcipher, base);
1238}
1239EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
1240
1241struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
1242{
1243 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1244
1245 return ctx->child;
1246}
1247EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
1248
1249bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
1250{
1251 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1252
1253 return atomic_read(&ctx->refcnt) - 1;
1254}
1255EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1256
1257void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1258{
1259 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1260
1261 if (atomic_dec_and_test(&ctx->refcnt))
1262 crypto_free_skcipher(&tfm->base);
1263}
1264EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1265
1266struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1267 u32 type, u32 mask)
1268{
1269 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1270 struct cryptd_hash_ctx *ctx;
1271 struct crypto_ahash *tfm;
1272
1273 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1274 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1275 return ERR_PTR(-EINVAL);
1276 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1277 if (IS_ERR(tfm))
1278 return ERR_CAST(tfm);
1279 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1280 crypto_free_ahash(tfm);
1281 return ERR_PTR(-EINVAL);
1282 }
1283
1284 ctx = crypto_ahash_ctx(tfm);
1285 atomic_set(&ctx->refcnt, 1);
1286
1287 return __cryptd_ahash_cast(tfm);
1288}
1289EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1290
1291struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1292{
1293 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1294
1295 return ctx->child;
1296}
1297EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1298
1299struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1300{
1301 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1302 return &rctx->desc;
1303}
1304EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1305
1306bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1307{
1308 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1309
1310 return atomic_read(&ctx->refcnt) - 1;
1311}
1312EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1313
1314void cryptd_free_ahash(struct cryptd_ahash *tfm)
1315{
1316 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1317
1318 if (atomic_dec_and_test(&ctx->refcnt))
1319 crypto_free_ahash(&tfm->base);
1320}
1321EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1322
1323struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1324 u32 type, u32 mask)
1325{
1326 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1327 struct cryptd_aead_ctx *ctx;
1328 struct crypto_aead *tfm;
1329
1330 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1331 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1332 return ERR_PTR(-EINVAL);
1333 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1334 if (IS_ERR(tfm))
1335 return ERR_CAST(tfm);
1336 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1337 crypto_free_aead(tfm);
1338 return ERR_PTR(-EINVAL);
1339 }
1340
1341 ctx = crypto_aead_ctx(tfm);
1342 atomic_set(&ctx->refcnt, 1);
1343
1344 return __cryptd_aead_cast(tfm);
1345}
1346EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1347
1348struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1349{
1350 struct cryptd_aead_ctx *ctx;
1351 ctx = crypto_aead_ctx(&tfm->base);
1352 return ctx->child;
1353}
1354EXPORT_SYMBOL_GPL(cryptd_aead_child);
1355
1356bool cryptd_aead_queued(struct cryptd_aead *tfm)
1357{
1358 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1359
1360 return atomic_read(&ctx->refcnt) - 1;
1361}
1362EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1363
1364void cryptd_free_aead(struct cryptd_aead *tfm)
1365{
1366 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1367
1368 if (atomic_dec_and_test(&ctx->refcnt))
1369 crypto_free_aead(&tfm->base);
1370}
1371EXPORT_SYMBOL_GPL(cryptd_free_aead);
1372
1373static int __init cryptd_init(void)
1374{
1375 int err;
1376
1377 err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
1378 if (err)
1379 return err;
1380
1381 err = crypto_register_template(&cryptd_tmpl);
1382 if (err)
1383 cryptd_fini_queue(&queue);
1384
1385 return err;
1386}
1387
1388static void __exit cryptd_exit(void)
1389{
1390 cryptd_fini_queue(&queue);
1391 crypto_unregister_template(&cryptd_tmpl);
1392}
1393
1394subsys_initcall(cryptd_init);
1395module_exit(cryptd_exit);
1396
1397MODULE_LICENSE("GPL");
1398MODULE_DESCRIPTION("Software async crypto daemon");
1399MODULE_ALIAS_CRYPTO("cryptd");