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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 crypto_completion_t complete;
76 struct skcipher_request req;
77};
78
79struct cryptd_hash_ctx {
80 refcount_t refcnt;
81 struct crypto_shash *child;
82};
83
84struct cryptd_hash_request_ctx {
85 crypto_completion_t complete;
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 crypto_completion_t complete;
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 backlog->complete(backlog, -EINPROGRESS);
181 req->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 void cryptd_skcipher_complete(struct skcipher_request *req, int err)
241{
242 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
243 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
244 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
245 int refcnt = refcount_read(&ctx->refcnt);
246
247 local_bh_disable();
248 rctx->complete(&req->base, err);
249 local_bh_enable();
250
251 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
252 crypto_free_skcipher(tfm);
253}
254
255static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
256 int err)
257{
258 struct skcipher_request *req = skcipher_request_cast(base);
259 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
260 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
261 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
262 struct skcipher_request *subreq = &rctx->req;
263 struct crypto_skcipher *child = ctx->child;
264
265 if (unlikely(err == -EINPROGRESS))
266 goto out;
267
268 skcipher_request_set_tfm(subreq, child);
269 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
270 NULL, NULL);
271 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
272 req->iv);
273
274 err = crypto_skcipher_encrypt(subreq);
275 skcipher_request_zero(subreq);
276
277 req->base.complete = rctx->complete;
278
279out:
280 cryptd_skcipher_complete(req, err);
281}
282
283static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
284 int err)
285{
286 struct skcipher_request *req = skcipher_request_cast(base);
287 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
288 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
289 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
290 struct skcipher_request *subreq = &rctx->req;
291 struct crypto_skcipher *child = ctx->child;
292
293 if (unlikely(err == -EINPROGRESS))
294 goto out;
295
296 skcipher_request_set_tfm(subreq, child);
297 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
298 NULL, NULL);
299 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
300 req->iv);
301
302 err = crypto_skcipher_decrypt(subreq);
303 skcipher_request_zero(subreq);
304
305 req->base.complete = rctx->complete;
306
307out:
308 cryptd_skcipher_complete(req, err);
309}
310
311static int cryptd_skcipher_enqueue(struct skcipher_request *req,
312 crypto_completion_t compl)
313{
314 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
315 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
316 struct cryptd_queue *queue;
317
318 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
319 rctx->complete = req->base.complete;
320 req->base.complete = compl;
321
322 return cryptd_enqueue_request(queue, &req->base);
323}
324
325static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
326{
327 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
328}
329
330static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
331{
332 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
333}
334
335static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
336{
337 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
338 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
339 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
340 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
341 struct crypto_skcipher *cipher;
342
343 cipher = crypto_spawn_skcipher(spawn);
344 if (IS_ERR(cipher))
345 return PTR_ERR(cipher);
346
347 ctx->child = cipher;
348 crypto_skcipher_set_reqsize(
349 tfm, sizeof(struct cryptd_skcipher_request_ctx) +
350 crypto_skcipher_reqsize(cipher));
351 return 0;
352}
353
354static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
355{
356 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
357
358 crypto_free_skcipher(ctx->child);
359}
360
361static void cryptd_skcipher_free(struct skcipher_instance *inst)
362{
363 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
364
365 crypto_drop_skcipher(&ctx->spawn);
366 kfree(inst);
367}
368
369static int cryptd_create_skcipher(struct crypto_template *tmpl,
370 struct rtattr **tb,
371 struct crypto_attr_type *algt,
372 struct cryptd_queue *queue)
373{
374 struct skcipherd_instance_ctx *ctx;
375 struct skcipher_instance *inst;
376 struct skcipher_alg *alg;
377 u32 type;
378 u32 mask;
379 int err;
380
381 cryptd_type_and_mask(algt, &type, &mask);
382
383 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
384 if (!inst)
385 return -ENOMEM;
386
387 ctx = skcipher_instance_ctx(inst);
388 ctx->queue = queue;
389
390 err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
391 crypto_attr_alg_name(tb[1]), type, mask);
392 if (err)
393 goto err_free_inst;
394
395 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
396 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
397 if (err)
398 goto err_free_inst;
399
400 inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
401 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
402 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
403 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
404 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
405 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
406
407 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
408
409 inst->alg.init = cryptd_skcipher_init_tfm;
410 inst->alg.exit = cryptd_skcipher_exit_tfm;
411
412 inst->alg.setkey = cryptd_skcipher_setkey;
413 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
414 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
415
416 inst->free = cryptd_skcipher_free;
417
418 err = skcipher_register_instance(tmpl, inst);
419 if (err) {
420err_free_inst:
421 cryptd_skcipher_free(inst);
422 }
423 return err;
424}
425
426static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
427{
428 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
429 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
430 struct crypto_shash_spawn *spawn = &ictx->spawn;
431 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
432 struct crypto_shash *hash;
433
434 hash = crypto_spawn_shash(spawn);
435 if (IS_ERR(hash))
436 return PTR_ERR(hash);
437
438 ctx->child = hash;
439 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
440 sizeof(struct cryptd_hash_request_ctx) +
441 crypto_shash_descsize(hash));
442 return 0;
443}
444
445static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
446{
447 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
448
449 crypto_free_shash(ctx->child);
450}
451
452static int cryptd_hash_setkey(struct crypto_ahash *parent,
453 const u8 *key, unsigned int keylen)
454{
455 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
456 struct crypto_shash *child = ctx->child;
457
458 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
459 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
460 CRYPTO_TFM_REQ_MASK);
461 return crypto_shash_setkey(child, key, keylen);
462}
463
464static int cryptd_hash_enqueue(struct ahash_request *req,
465 crypto_completion_t compl)
466{
467 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
468 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
469 struct cryptd_queue *queue =
470 cryptd_get_queue(crypto_ahash_tfm(tfm));
471
472 rctx->complete = req->base.complete;
473 req->base.complete = compl;
474
475 return cryptd_enqueue_request(queue, &req->base);
476}
477
478static void cryptd_hash_complete(struct ahash_request *req, int err)
479{
480 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
481 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
482 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
483 int refcnt = refcount_read(&ctx->refcnt);
484
485 local_bh_disable();
486 rctx->complete(&req->base, err);
487 local_bh_enable();
488
489 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
490 crypto_free_ahash(tfm);
491}
492
493static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
494{
495 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
496 struct crypto_shash *child = ctx->child;
497 struct ahash_request *req = ahash_request_cast(req_async);
498 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
499 struct shash_desc *desc = &rctx->desc;
500
501 if (unlikely(err == -EINPROGRESS))
502 goto out;
503
504 desc->tfm = child;
505
506 err = crypto_shash_init(desc);
507
508 req->base.complete = rctx->complete;
509
510out:
511 cryptd_hash_complete(req, err);
512}
513
514static int cryptd_hash_init_enqueue(struct ahash_request *req)
515{
516 return cryptd_hash_enqueue(req, cryptd_hash_init);
517}
518
519static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
520{
521 struct ahash_request *req = ahash_request_cast(req_async);
522 struct cryptd_hash_request_ctx *rctx;
523
524 rctx = ahash_request_ctx(req);
525
526 if (unlikely(err == -EINPROGRESS))
527 goto out;
528
529 err = shash_ahash_update(req, &rctx->desc);
530
531 req->base.complete = rctx->complete;
532
533out:
534 cryptd_hash_complete(req, err);
535}
536
537static int cryptd_hash_update_enqueue(struct ahash_request *req)
538{
539 return cryptd_hash_enqueue(req, cryptd_hash_update);
540}
541
542static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
543{
544 struct ahash_request *req = ahash_request_cast(req_async);
545 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
546
547 if (unlikely(err == -EINPROGRESS))
548 goto out;
549
550 err = crypto_shash_final(&rctx->desc, req->result);
551
552 req->base.complete = rctx->complete;
553
554out:
555 cryptd_hash_complete(req, err);
556}
557
558static int cryptd_hash_final_enqueue(struct ahash_request *req)
559{
560 return cryptd_hash_enqueue(req, cryptd_hash_final);
561}
562
563static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
564{
565 struct ahash_request *req = ahash_request_cast(req_async);
566 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
567
568 if (unlikely(err == -EINPROGRESS))
569 goto out;
570
571 err = shash_ahash_finup(req, &rctx->desc);
572
573 req->base.complete = rctx->complete;
574
575out:
576 cryptd_hash_complete(req, err);
577}
578
579static int cryptd_hash_finup_enqueue(struct ahash_request *req)
580{
581 return cryptd_hash_enqueue(req, cryptd_hash_finup);
582}
583
584static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
585{
586 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
587 struct crypto_shash *child = ctx->child;
588 struct ahash_request *req = ahash_request_cast(req_async);
589 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
590 struct shash_desc *desc = &rctx->desc;
591
592 if (unlikely(err == -EINPROGRESS))
593 goto out;
594
595 desc->tfm = child;
596
597 err = shash_ahash_digest(req, desc);
598
599 req->base.complete = rctx->complete;
600
601out:
602 cryptd_hash_complete(req, err);
603}
604
605static int cryptd_hash_digest_enqueue(struct ahash_request *req)
606{
607 return cryptd_hash_enqueue(req, cryptd_hash_digest);
608}
609
610static int cryptd_hash_export(struct ahash_request *req, void *out)
611{
612 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
613
614 return crypto_shash_export(&rctx->desc, out);
615}
616
617static int cryptd_hash_import(struct ahash_request *req, const void *in)
618{
619 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
620 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
621 struct shash_desc *desc = cryptd_shash_desc(req);
622
623 desc->tfm = ctx->child;
624
625 return crypto_shash_import(desc, in);
626}
627
628static void cryptd_hash_free(struct ahash_instance *inst)
629{
630 struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst);
631
632 crypto_drop_shash(&ctx->spawn);
633 kfree(inst);
634}
635
636static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
637 struct crypto_attr_type *algt,
638 struct cryptd_queue *queue)
639{
640 struct hashd_instance_ctx *ctx;
641 struct ahash_instance *inst;
642 struct shash_alg *alg;
643 u32 type;
644 u32 mask;
645 int err;
646
647 cryptd_type_and_mask(algt, &type, &mask);
648
649 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
650 if (!inst)
651 return -ENOMEM;
652
653 ctx = ahash_instance_ctx(inst);
654 ctx->queue = queue;
655
656 err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst),
657 crypto_attr_alg_name(tb[1]), type, mask);
658 if (err)
659 goto err_free_inst;
660 alg = crypto_spawn_shash_alg(&ctx->spawn);
661
662 err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base);
663 if (err)
664 goto err_free_inst;
665
666 inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC |
667 (alg->base.cra_flags & (CRYPTO_ALG_INTERNAL|
668 CRYPTO_ALG_OPTIONAL_KEY));
669 inst->alg.halg.digestsize = alg->digestsize;
670 inst->alg.halg.statesize = alg->statesize;
671 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
672
673 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
674 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
675
676 inst->alg.init = cryptd_hash_init_enqueue;
677 inst->alg.update = cryptd_hash_update_enqueue;
678 inst->alg.final = cryptd_hash_final_enqueue;
679 inst->alg.finup = cryptd_hash_finup_enqueue;
680 inst->alg.export = cryptd_hash_export;
681 inst->alg.import = cryptd_hash_import;
682 if (crypto_shash_alg_has_setkey(alg))
683 inst->alg.setkey = cryptd_hash_setkey;
684 inst->alg.digest = cryptd_hash_digest_enqueue;
685
686 inst->free = cryptd_hash_free;
687
688 err = ahash_register_instance(tmpl, inst);
689 if (err) {
690err_free_inst:
691 cryptd_hash_free(inst);
692 }
693 return err;
694}
695
696static int cryptd_aead_setkey(struct crypto_aead *parent,
697 const u8 *key, unsigned int keylen)
698{
699 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
700 struct crypto_aead *child = ctx->child;
701
702 return crypto_aead_setkey(child, key, keylen);
703}
704
705static int cryptd_aead_setauthsize(struct crypto_aead *parent,
706 unsigned int authsize)
707{
708 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
709 struct crypto_aead *child = ctx->child;
710
711 return crypto_aead_setauthsize(child, authsize);
712}
713
714static void cryptd_aead_crypt(struct aead_request *req,
715 struct crypto_aead *child,
716 int err,
717 int (*crypt)(struct aead_request *req))
718{
719 struct cryptd_aead_request_ctx *rctx;
720 struct cryptd_aead_ctx *ctx;
721 crypto_completion_t compl;
722 struct crypto_aead *tfm;
723 int refcnt;
724
725 rctx = aead_request_ctx(req);
726 compl = rctx->complete;
727
728 tfm = crypto_aead_reqtfm(req);
729
730 if (unlikely(err == -EINPROGRESS))
731 goto out;
732 aead_request_set_tfm(req, child);
733 err = crypt( req );
734
735out:
736 ctx = crypto_aead_ctx(tfm);
737 refcnt = refcount_read(&ctx->refcnt);
738
739 local_bh_disable();
740 compl(&req->base, err);
741 local_bh_enable();
742
743 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
744 crypto_free_aead(tfm);
745}
746
747static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
748{
749 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
750 struct crypto_aead *child = ctx->child;
751 struct aead_request *req;
752
753 req = container_of(areq, struct aead_request, base);
754 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
755}
756
757static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
758{
759 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
760 struct crypto_aead *child = ctx->child;
761 struct aead_request *req;
762
763 req = container_of(areq, struct aead_request, base);
764 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
765}
766
767static int cryptd_aead_enqueue(struct aead_request *req,
768 crypto_completion_t compl)
769{
770 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
771 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
772 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
773
774 rctx->complete = req->base.complete;
775 req->base.complete = compl;
776 return cryptd_enqueue_request(queue, &req->base);
777}
778
779static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
780{
781 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
782}
783
784static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
785{
786 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
787}
788
789static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
790{
791 struct aead_instance *inst = aead_alg_instance(tfm);
792 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
793 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
794 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
795 struct crypto_aead *cipher;
796
797 cipher = crypto_spawn_aead(spawn);
798 if (IS_ERR(cipher))
799 return PTR_ERR(cipher);
800
801 ctx->child = cipher;
802 crypto_aead_set_reqsize(
803 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
804 crypto_aead_reqsize(cipher)));
805 return 0;
806}
807
808static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
809{
810 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
811 crypto_free_aead(ctx->child);
812}
813
814static void cryptd_aead_free(struct aead_instance *inst)
815{
816 struct aead_instance_ctx *ctx = aead_instance_ctx(inst);
817
818 crypto_drop_aead(&ctx->aead_spawn);
819 kfree(inst);
820}
821
822static int cryptd_create_aead(struct crypto_template *tmpl,
823 struct rtattr **tb,
824 struct crypto_attr_type *algt,
825 struct cryptd_queue *queue)
826{
827 struct aead_instance_ctx *ctx;
828 struct aead_instance *inst;
829 struct aead_alg *alg;
830 u32 type;
831 u32 mask;
832 int err;
833
834 cryptd_type_and_mask(algt, &type, &mask);
835
836 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
837 if (!inst)
838 return -ENOMEM;
839
840 ctx = aead_instance_ctx(inst);
841 ctx->queue = queue;
842
843 err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
844 crypto_attr_alg_name(tb[1]), type, mask);
845 if (err)
846 goto err_free_inst;
847
848 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
849 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
850 if (err)
851 goto err_free_inst;
852
853 inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
854 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
855 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
856
857 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
858 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
859
860 inst->alg.init = cryptd_aead_init_tfm;
861 inst->alg.exit = cryptd_aead_exit_tfm;
862 inst->alg.setkey = cryptd_aead_setkey;
863 inst->alg.setauthsize = cryptd_aead_setauthsize;
864 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
865 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
866
867 inst->free = cryptd_aead_free;
868
869 err = aead_register_instance(tmpl, inst);
870 if (err) {
871err_free_inst:
872 cryptd_aead_free(inst);
873 }
874 return err;
875}
876
877static struct cryptd_queue queue;
878
879static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
880{
881 struct crypto_attr_type *algt;
882
883 algt = crypto_get_attr_type(tb);
884 if (IS_ERR(algt))
885 return PTR_ERR(algt);
886
887 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
888 case CRYPTO_ALG_TYPE_SKCIPHER:
889 return cryptd_create_skcipher(tmpl, tb, algt, &queue);
890 case CRYPTO_ALG_TYPE_HASH:
891 return cryptd_create_hash(tmpl, tb, algt, &queue);
892 case CRYPTO_ALG_TYPE_AEAD:
893 return cryptd_create_aead(tmpl, tb, algt, &queue);
894 }
895
896 return -EINVAL;
897}
898
899static struct crypto_template cryptd_tmpl = {
900 .name = "cryptd",
901 .create = cryptd_create,
902 .module = THIS_MODULE,
903};
904
905struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
906 u32 type, u32 mask)
907{
908 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
909 struct cryptd_skcipher_ctx *ctx;
910 struct crypto_skcipher *tfm;
911
912 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
913 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
914 return ERR_PTR(-EINVAL);
915
916 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
917 if (IS_ERR(tfm))
918 return ERR_CAST(tfm);
919
920 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
921 crypto_free_skcipher(tfm);
922 return ERR_PTR(-EINVAL);
923 }
924
925 ctx = crypto_skcipher_ctx(tfm);
926 refcount_set(&ctx->refcnt, 1);
927
928 return container_of(tfm, struct cryptd_skcipher, base);
929}
930EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
931
932struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
933{
934 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
935
936 return ctx->child;
937}
938EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
939
940bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
941{
942 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
943
944 return refcount_read(&ctx->refcnt) - 1;
945}
946EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
947
948void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
949{
950 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
951
952 if (refcount_dec_and_test(&ctx->refcnt))
953 crypto_free_skcipher(&tfm->base);
954}
955EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
956
957struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
958 u32 type, u32 mask)
959{
960 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
961 struct cryptd_hash_ctx *ctx;
962 struct crypto_ahash *tfm;
963
964 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
965 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
966 return ERR_PTR(-EINVAL);
967 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
968 if (IS_ERR(tfm))
969 return ERR_CAST(tfm);
970 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
971 crypto_free_ahash(tfm);
972 return ERR_PTR(-EINVAL);
973 }
974
975 ctx = crypto_ahash_ctx(tfm);
976 refcount_set(&ctx->refcnt, 1);
977
978 return __cryptd_ahash_cast(tfm);
979}
980EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
981
982struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
983{
984 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
985
986 return ctx->child;
987}
988EXPORT_SYMBOL_GPL(cryptd_ahash_child);
989
990struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
991{
992 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
993 return &rctx->desc;
994}
995EXPORT_SYMBOL_GPL(cryptd_shash_desc);
996
997bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
998{
999 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1000
1001 return refcount_read(&ctx->refcnt) - 1;
1002}
1003EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1004
1005void cryptd_free_ahash(struct cryptd_ahash *tfm)
1006{
1007 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1008
1009 if (refcount_dec_and_test(&ctx->refcnt))
1010 crypto_free_ahash(&tfm->base);
1011}
1012EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1013
1014struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1015 u32 type, u32 mask)
1016{
1017 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1018 struct cryptd_aead_ctx *ctx;
1019 struct crypto_aead *tfm;
1020
1021 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1022 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1023 return ERR_PTR(-EINVAL);
1024 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1025 if (IS_ERR(tfm))
1026 return ERR_CAST(tfm);
1027 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1028 crypto_free_aead(tfm);
1029 return ERR_PTR(-EINVAL);
1030 }
1031
1032 ctx = crypto_aead_ctx(tfm);
1033 refcount_set(&ctx->refcnt, 1);
1034
1035 return __cryptd_aead_cast(tfm);
1036}
1037EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1038
1039struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1040{
1041 struct cryptd_aead_ctx *ctx;
1042 ctx = crypto_aead_ctx(&tfm->base);
1043 return ctx->child;
1044}
1045EXPORT_SYMBOL_GPL(cryptd_aead_child);
1046
1047bool cryptd_aead_queued(struct cryptd_aead *tfm)
1048{
1049 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1050
1051 return refcount_read(&ctx->refcnt) - 1;
1052}
1053EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1054
1055void cryptd_free_aead(struct cryptd_aead *tfm)
1056{
1057 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1058
1059 if (refcount_dec_and_test(&ctx->refcnt))
1060 crypto_free_aead(&tfm->base);
1061}
1062EXPORT_SYMBOL_GPL(cryptd_free_aead);
1063
1064static int __init cryptd_init(void)
1065{
1066 int err;
1067
1068 cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1069 1);
1070 if (!cryptd_wq)
1071 return -ENOMEM;
1072
1073 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1074 if (err)
1075 goto err_destroy_wq;
1076
1077 err = crypto_register_template(&cryptd_tmpl);
1078 if (err)
1079 goto err_fini_queue;
1080
1081 return 0;
1082
1083err_fini_queue:
1084 cryptd_fini_queue(&queue);
1085err_destroy_wq:
1086 destroy_workqueue(cryptd_wq);
1087 return err;
1088}
1089
1090static void __exit cryptd_exit(void)
1091{
1092 destroy_workqueue(cryptd_wq);
1093 cryptd_fini_queue(&queue);
1094 crypto_unregister_template(&cryptd_tmpl);
1095}
1096
1097subsys_initcall(cryptd_init);
1098module_exit(cryptd_exit);
1099
1100MODULE_LICENSE("GPL");
1101MODULE_DESCRIPTION("Software async crypto daemon");
1102MODULE_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");