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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 struct cryptd_cpu_queue __percpu *cpu_queue;
43};
44
45struct cryptd_instance_ctx {
46 struct crypto_spawn spawn;
47 struct cryptd_queue *queue;
48};
49
50struct skcipherd_instance_ctx {
51 struct crypto_skcipher_spawn spawn;
52 struct cryptd_queue *queue;
53};
54
55struct hashd_instance_ctx {
56 struct crypto_shash_spawn spawn;
57 struct cryptd_queue *queue;
58};
59
60struct aead_instance_ctx {
61 struct crypto_aead_spawn aead_spawn;
62 struct cryptd_queue *queue;
63};
64
65struct cryptd_skcipher_ctx {
66 refcount_t refcnt;
67 struct crypto_sync_skcipher *child;
68};
69
70struct cryptd_skcipher_request_ctx {
71 crypto_completion_t complete;
72};
73
74struct cryptd_hash_ctx {
75 refcount_t refcnt;
76 struct crypto_shash *child;
77};
78
79struct cryptd_hash_request_ctx {
80 crypto_completion_t complete;
81 struct shash_desc desc;
82};
83
84struct cryptd_aead_ctx {
85 refcount_t refcnt;
86 struct crypto_aead *child;
87};
88
89struct cryptd_aead_request_ctx {
90 crypto_completion_t complete;
91};
92
93static void cryptd_queue_worker(struct work_struct *work);
94
95static int cryptd_init_queue(struct cryptd_queue *queue,
96 unsigned int max_cpu_qlen)
97{
98 int cpu;
99 struct cryptd_cpu_queue *cpu_queue;
100
101 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
102 if (!queue->cpu_queue)
103 return -ENOMEM;
104 for_each_possible_cpu(cpu) {
105 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
106 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
107 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
108 }
109 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
110 return 0;
111}
112
113static void cryptd_fini_queue(struct cryptd_queue *queue)
114{
115 int cpu;
116 struct cryptd_cpu_queue *cpu_queue;
117
118 for_each_possible_cpu(cpu) {
119 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
120 BUG_ON(cpu_queue->queue.qlen);
121 }
122 free_percpu(queue->cpu_queue);
123}
124
125static int cryptd_enqueue_request(struct cryptd_queue *queue,
126 struct crypto_async_request *request)
127{
128 int cpu, err;
129 struct cryptd_cpu_queue *cpu_queue;
130 refcount_t *refcnt;
131
132 cpu = get_cpu();
133 cpu_queue = this_cpu_ptr(queue->cpu_queue);
134 err = crypto_enqueue_request(&cpu_queue->queue, request);
135
136 refcnt = crypto_tfm_ctx(request->tfm);
137
138 if (err == -ENOSPC)
139 goto out_put_cpu;
140
141 queue_work_on(cpu, cryptd_wq, &cpu_queue->work);
142
143 if (!refcount_read(refcnt))
144 goto out_put_cpu;
145
146 refcount_inc(refcnt);
147
148out_put_cpu:
149 put_cpu();
150
151 return err;
152}
153
154/* Called in workqueue context, do one real cryption work (via
155 * req->complete) and reschedule itself if there are more work to
156 * do. */
157static void cryptd_queue_worker(struct work_struct *work)
158{
159 struct cryptd_cpu_queue *cpu_queue;
160 struct crypto_async_request *req, *backlog;
161
162 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
163 /*
164 * Only handle one request at a time to avoid hogging crypto workqueue.
165 * preempt_disable/enable is used to prevent being preempted by
166 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
167 * cryptd_enqueue_request() being accessed from software interrupts.
168 */
169 local_bh_disable();
170 preempt_disable();
171 backlog = crypto_get_backlog(&cpu_queue->queue);
172 req = crypto_dequeue_request(&cpu_queue->queue);
173 preempt_enable();
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 inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
195 u32 *mask)
196{
197 struct crypto_attr_type *algt;
198
199 algt = crypto_get_attr_type(tb);
200 if (IS_ERR(algt))
201 return;
202
203 *type |= algt->type & CRYPTO_ALG_INTERNAL;
204 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
205}
206
207static int cryptd_init_instance(struct crypto_instance *inst,
208 struct crypto_alg *alg)
209{
210 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
211 "cryptd(%s)",
212 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
213 return -ENAMETOOLONG;
214
215 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
216
217 inst->alg.cra_priority = alg->cra_priority + 50;
218 inst->alg.cra_blocksize = alg->cra_blocksize;
219 inst->alg.cra_alignmask = alg->cra_alignmask;
220
221 return 0;
222}
223
224static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
225 unsigned int tail)
226{
227 char *p;
228 struct crypto_instance *inst;
229 int err;
230
231 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
232 if (!p)
233 return ERR_PTR(-ENOMEM);
234
235 inst = (void *)(p + head);
236
237 err = cryptd_init_instance(inst, alg);
238 if (err)
239 goto out_free_inst;
240
241out:
242 return p;
243
244out_free_inst:
245 kfree(p);
246 p = ERR_PTR(err);
247 goto out;
248}
249
250static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
251 const u8 *key, unsigned int keylen)
252{
253 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
254 struct crypto_sync_skcipher *child = ctx->child;
255 int err;
256
257 crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
258 crypto_sync_skcipher_set_flags(child,
259 crypto_skcipher_get_flags(parent) &
260 CRYPTO_TFM_REQ_MASK);
261 err = crypto_sync_skcipher_setkey(child, key, keylen);
262 crypto_skcipher_set_flags(parent,
263 crypto_sync_skcipher_get_flags(child) &
264 CRYPTO_TFM_RES_MASK);
265 return err;
266}
267
268static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
269{
270 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
271 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
272 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
273 int refcnt = refcount_read(&ctx->refcnt);
274
275 local_bh_disable();
276 rctx->complete(&req->base, err);
277 local_bh_enable();
278
279 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
280 crypto_free_skcipher(tfm);
281}
282
283static void cryptd_skcipher_encrypt(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 crypto_sync_skcipher *child = ctx->child;
291 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
292
293 if (unlikely(err == -EINPROGRESS))
294 goto out;
295
296 skcipher_request_set_sync_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_encrypt(subreq);
303 skcipher_request_zero(subreq);
304
305 req->base.complete = rctx->complete;
306
307out:
308 cryptd_skcipher_complete(req, err);
309}
310
311static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
312 int err)
313{
314 struct skcipher_request *req = skcipher_request_cast(base);
315 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
316 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
317 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
318 struct crypto_sync_skcipher *child = ctx->child;
319 SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child);
320
321 if (unlikely(err == -EINPROGRESS))
322 goto out;
323
324 skcipher_request_set_sync_tfm(subreq, child);
325 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
326 NULL, NULL);
327 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
328 req->iv);
329
330 err = crypto_skcipher_decrypt(subreq);
331 skcipher_request_zero(subreq);
332
333 req->base.complete = rctx->complete;
334
335out:
336 cryptd_skcipher_complete(req, err);
337}
338
339static int cryptd_skcipher_enqueue(struct skcipher_request *req,
340 crypto_completion_t compl)
341{
342 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
343 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
344 struct cryptd_queue *queue;
345
346 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
347 rctx->complete = req->base.complete;
348 req->base.complete = compl;
349
350 return cryptd_enqueue_request(queue, &req->base);
351}
352
353static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
354{
355 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
356}
357
358static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
359{
360 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
361}
362
363static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
364{
365 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
366 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
367 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
368 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
369 struct crypto_skcipher *cipher;
370
371 cipher = crypto_spawn_skcipher(spawn);
372 if (IS_ERR(cipher))
373 return PTR_ERR(cipher);
374
375 ctx->child = (struct crypto_sync_skcipher *)cipher;
376 crypto_skcipher_set_reqsize(
377 tfm, sizeof(struct cryptd_skcipher_request_ctx));
378 return 0;
379}
380
381static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
382{
383 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
384
385 crypto_free_sync_skcipher(ctx->child);
386}
387
388static void cryptd_skcipher_free(struct skcipher_instance *inst)
389{
390 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
391
392 crypto_drop_skcipher(&ctx->spawn);
393 kfree(inst);
394}
395
396static int cryptd_create_skcipher(struct crypto_template *tmpl,
397 struct rtattr **tb,
398 struct cryptd_queue *queue)
399{
400 struct skcipherd_instance_ctx *ctx;
401 struct skcipher_instance *inst;
402 struct skcipher_alg *alg;
403 const char *name;
404 u32 type;
405 u32 mask;
406 int err;
407
408 type = 0;
409 mask = CRYPTO_ALG_ASYNC;
410
411 cryptd_check_internal(tb, &type, &mask);
412
413 name = crypto_attr_alg_name(tb[1]);
414 if (IS_ERR(name))
415 return PTR_ERR(name);
416
417 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
418 if (!inst)
419 return -ENOMEM;
420
421 ctx = skcipher_instance_ctx(inst);
422 ctx->queue = queue;
423
424 crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
425 err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
426 if (err)
427 goto out_free_inst;
428
429 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
430 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
431 if (err)
432 goto out_drop_skcipher;
433
434 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
435 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
436
437 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
438 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
439 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
440 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
441
442 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
443
444 inst->alg.init = cryptd_skcipher_init_tfm;
445 inst->alg.exit = cryptd_skcipher_exit_tfm;
446
447 inst->alg.setkey = cryptd_skcipher_setkey;
448 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
449 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
450
451 inst->free = cryptd_skcipher_free;
452
453 err = skcipher_register_instance(tmpl, inst);
454 if (err) {
455out_drop_skcipher:
456 crypto_drop_skcipher(&ctx->spawn);
457out_free_inst:
458 kfree(inst);
459 }
460 return err;
461}
462
463static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
464{
465 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
466 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
467 struct crypto_shash_spawn *spawn = &ictx->spawn;
468 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
469 struct crypto_shash *hash;
470
471 hash = crypto_spawn_shash(spawn);
472 if (IS_ERR(hash))
473 return PTR_ERR(hash);
474
475 ctx->child = hash;
476 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
477 sizeof(struct cryptd_hash_request_ctx) +
478 crypto_shash_descsize(hash));
479 return 0;
480}
481
482static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
483{
484 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
485
486 crypto_free_shash(ctx->child);
487}
488
489static int cryptd_hash_setkey(struct crypto_ahash *parent,
490 const u8 *key, unsigned int keylen)
491{
492 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
493 struct crypto_shash *child = ctx->child;
494 int err;
495
496 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
497 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
498 CRYPTO_TFM_REQ_MASK);
499 err = crypto_shash_setkey(child, key, keylen);
500 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
501 CRYPTO_TFM_RES_MASK);
502 return err;
503}
504
505static int cryptd_hash_enqueue(struct ahash_request *req,
506 crypto_completion_t compl)
507{
508 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
509 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
510 struct cryptd_queue *queue =
511 cryptd_get_queue(crypto_ahash_tfm(tfm));
512
513 rctx->complete = req->base.complete;
514 req->base.complete = compl;
515
516 return cryptd_enqueue_request(queue, &req->base);
517}
518
519static void cryptd_hash_complete(struct ahash_request *req, int err)
520{
521 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
522 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
523 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
524 int refcnt = refcount_read(&ctx->refcnt);
525
526 local_bh_disable();
527 rctx->complete(&req->base, err);
528 local_bh_enable();
529
530 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
531 crypto_free_ahash(tfm);
532}
533
534static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
535{
536 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
537 struct crypto_shash *child = ctx->child;
538 struct ahash_request *req = ahash_request_cast(req_async);
539 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
540 struct shash_desc *desc = &rctx->desc;
541
542 if (unlikely(err == -EINPROGRESS))
543 goto out;
544
545 desc->tfm = child;
546
547 err = crypto_shash_init(desc);
548
549 req->base.complete = rctx->complete;
550
551out:
552 cryptd_hash_complete(req, err);
553}
554
555static int cryptd_hash_init_enqueue(struct ahash_request *req)
556{
557 return cryptd_hash_enqueue(req, cryptd_hash_init);
558}
559
560static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
561{
562 struct ahash_request *req = ahash_request_cast(req_async);
563 struct cryptd_hash_request_ctx *rctx;
564
565 rctx = ahash_request_ctx(req);
566
567 if (unlikely(err == -EINPROGRESS))
568 goto out;
569
570 err = shash_ahash_update(req, &rctx->desc);
571
572 req->base.complete = rctx->complete;
573
574out:
575 cryptd_hash_complete(req, err);
576}
577
578static int cryptd_hash_update_enqueue(struct ahash_request *req)
579{
580 return cryptd_hash_enqueue(req, cryptd_hash_update);
581}
582
583static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
584{
585 struct ahash_request *req = ahash_request_cast(req_async);
586 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
587
588 if (unlikely(err == -EINPROGRESS))
589 goto out;
590
591 err = crypto_shash_final(&rctx->desc, req->result);
592
593 req->base.complete = rctx->complete;
594
595out:
596 cryptd_hash_complete(req, err);
597}
598
599static int cryptd_hash_final_enqueue(struct ahash_request *req)
600{
601 return cryptd_hash_enqueue(req, cryptd_hash_final);
602}
603
604static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
605{
606 struct ahash_request *req = ahash_request_cast(req_async);
607 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
608
609 if (unlikely(err == -EINPROGRESS))
610 goto out;
611
612 err = shash_ahash_finup(req, &rctx->desc);
613
614 req->base.complete = rctx->complete;
615
616out:
617 cryptd_hash_complete(req, err);
618}
619
620static int cryptd_hash_finup_enqueue(struct ahash_request *req)
621{
622 return cryptd_hash_enqueue(req, cryptd_hash_finup);
623}
624
625static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
626{
627 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
628 struct crypto_shash *child = ctx->child;
629 struct ahash_request *req = ahash_request_cast(req_async);
630 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
631 struct shash_desc *desc = &rctx->desc;
632
633 if (unlikely(err == -EINPROGRESS))
634 goto out;
635
636 desc->tfm = child;
637
638 err = shash_ahash_digest(req, desc);
639
640 req->base.complete = rctx->complete;
641
642out:
643 cryptd_hash_complete(req, err);
644}
645
646static int cryptd_hash_digest_enqueue(struct ahash_request *req)
647{
648 return cryptd_hash_enqueue(req, cryptd_hash_digest);
649}
650
651static int cryptd_hash_export(struct ahash_request *req, void *out)
652{
653 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
654
655 return crypto_shash_export(&rctx->desc, out);
656}
657
658static int cryptd_hash_import(struct ahash_request *req, const void *in)
659{
660 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
661 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
662 struct shash_desc *desc = cryptd_shash_desc(req);
663
664 desc->tfm = ctx->child;
665
666 return crypto_shash_import(desc, in);
667}
668
669static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
670 struct cryptd_queue *queue)
671{
672 struct hashd_instance_ctx *ctx;
673 struct ahash_instance *inst;
674 struct shash_alg *salg;
675 struct crypto_alg *alg;
676 u32 type = 0;
677 u32 mask = 0;
678 int err;
679
680 cryptd_check_internal(tb, &type, &mask);
681
682 salg = shash_attr_alg(tb[1], type, mask);
683 if (IS_ERR(salg))
684 return PTR_ERR(salg);
685
686 alg = &salg->base;
687 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
688 sizeof(*ctx));
689 err = PTR_ERR(inst);
690 if (IS_ERR(inst))
691 goto out_put_alg;
692
693 ctx = ahash_instance_ctx(inst);
694 ctx->queue = queue;
695
696 err = crypto_init_shash_spawn(&ctx->spawn, salg,
697 ahash_crypto_instance(inst));
698 if (err)
699 goto out_free_inst;
700
701 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
702 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
703 CRYPTO_ALG_OPTIONAL_KEY));
704
705 inst->alg.halg.digestsize = salg->digestsize;
706 inst->alg.halg.statesize = salg->statesize;
707 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
708
709 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
710 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
711
712 inst->alg.init = cryptd_hash_init_enqueue;
713 inst->alg.update = cryptd_hash_update_enqueue;
714 inst->alg.final = cryptd_hash_final_enqueue;
715 inst->alg.finup = cryptd_hash_finup_enqueue;
716 inst->alg.export = cryptd_hash_export;
717 inst->alg.import = cryptd_hash_import;
718 if (crypto_shash_alg_has_setkey(salg))
719 inst->alg.setkey = cryptd_hash_setkey;
720 inst->alg.digest = cryptd_hash_digest_enqueue;
721
722 err = ahash_register_instance(tmpl, inst);
723 if (err) {
724 crypto_drop_shash(&ctx->spawn);
725out_free_inst:
726 kfree(inst);
727 }
728
729out_put_alg:
730 crypto_mod_put(alg);
731 return err;
732}
733
734static int cryptd_aead_setkey(struct crypto_aead *parent,
735 const u8 *key, unsigned int keylen)
736{
737 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
738 struct crypto_aead *child = ctx->child;
739
740 return crypto_aead_setkey(child, key, keylen);
741}
742
743static int cryptd_aead_setauthsize(struct crypto_aead *parent,
744 unsigned int authsize)
745{
746 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
747 struct crypto_aead *child = ctx->child;
748
749 return crypto_aead_setauthsize(child, authsize);
750}
751
752static void cryptd_aead_crypt(struct aead_request *req,
753 struct crypto_aead *child,
754 int err,
755 int (*crypt)(struct aead_request *req))
756{
757 struct cryptd_aead_request_ctx *rctx;
758 struct cryptd_aead_ctx *ctx;
759 crypto_completion_t compl;
760 struct crypto_aead *tfm;
761 int refcnt;
762
763 rctx = aead_request_ctx(req);
764 compl = rctx->complete;
765
766 tfm = crypto_aead_reqtfm(req);
767
768 if (unlikely(err == -EINPROGRESS))
769 goto out;
770 aead_request_set_tfm(req, child);
771 err = crypt( req );
772
773out:
774 ctx = crypto_aead_ctx(tfm);
775 refcnt = refcount_read(&ctx->refcnt);
776
777 local_bh_disable();
778 compl(&req->base, err);
779 local_bh_enable();
780
781 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
782 crypto_free_aead(tfm);
783}
784
785static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
786{
787 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
788 struct crypto_aead *child = ctx->child;
789 struct aead_request *req;
790
791 req = container_of(areq, struct aead_request, base);
792 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
793}
794
795static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
796{
797 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
798 struct crypto_aead *child = ctx->child;
799 struct aead_request *req;
800
801 req = container_of(areq, struct aead_request, base);
802 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
803}
804
805static int cryptd_aead_enqueue(struct aead_request *req,
806 crypto_completion_t compl)
807{
808 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
809 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
810 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
811
812 rctx->complete = req->base.complete;
813 req->base.complete = compl;
814 return cryptd_enqueue_request(queue, &req->base);
815}
816
817static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
818{
819 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
820}
821
822static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
823{
824 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
825}
826
827static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
828{
829 struct aead_instance *inst = aead_alg_instance(tfm);
830 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
831 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
832 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
833 struct crypto_aead *cipher;
834
835 cipher = crypto_spawn_aead(spawn);
836 if (IS_ERR(cipher))
837 return PTR_ERR(cipher);
838
839 ctx->child = cipher;
840 crypto_aead_set_reqsize(
841 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
842 crypto_aead_reqsize(cipher)));
843 return 0;
844}
845
846static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
847{
848 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
849 crypto_free_aead(ctx->child);
850}
851
852static int cryptd_create_aead(struct crypto_template *tmpl,
853 struct rtattr **tb,
854 struct cryptd_queue *queue)
855{
856 struct aead_instance_ctx *ctx;
857 struct aead_instance *inst;
858 struct aead_alg *alg;
859 const char *name;
860 u32 type = 0;
861 u32 mask = CRYPTO_ALG_ASYNC;
862 int err;
863
864 cryptd_check_internal(tb, &type, &mask);
865
866 name = crypto_attr_alg_name(tb[1]);
867 if (IS_ERR(name))
868 return PTR_ERR(name);
869
870 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
871 if (!inst)
872 return -ENOMEM;
873
874 ctx = aead_instance_ctx(inst);
875 ctx->queue = queue;
876
877 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
878 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
879 if (err)
880 goto out_free_inst;
881
882 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
883 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
884 if (err)
885 goto out_drop_aead;
886
887 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
888 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
889 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
890
891 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
892 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
893
894 inst->alg.init = cryptd_aead_init_tfm;
895 inst->alg.exit = cryptd_aead_exit_tfm;
896 inst->alg.setkey = cryptd_aead_setkey;
897 inst->alg.setauthsize = cryptd_aead_setauthsize;
898 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
899 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
900
901 err = aead_register_instance(tmpl, inst);
902 if (err) {
903out_drop_aead:
904 crypto_drop_aead(&ctx->aead_spawn);
905out_free_inst:
906 kfree(inst);
907 }
908 return err;
909}
910
911static struct cryptd_queue queue;
912
913static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
914{
915 struct crypto_attr_type *algt;
916
917 algt = crypto_get_attr_type(tb);
918 if (IS_ERR(algt))
919 return PTR_ERR(algt);
920
921 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
922 case CRYPTO_ALG_TYPE_BLKCIPHER:
923 return cryptd_create_skcipher(tmpl, tb, &queue);
924 case CRYPTO_ALG_TYPE_HASH:
925 return cryptd_create_hash(tmpl, tb, &queue);
926 case CRYPTO_ALG_TYPE_AEAD:
927 return cryptd_create_aead(tmpl, tb, &queue);
928 }
929
930 return -EINVAL;
931}
932
933static void cryptd_free(struct crypto_instance *inst)
934{
935 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
936 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
937 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
938
939 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
940 case CRYPTO_ALG_TYPE_AHASH:
941 crypto_drop_shash(&hctx->spawn);
942 kfree(ahash_instance(inst));
943 return;
944 case CRYPTO_ALG_TYPE_AEAD:
945 crypto_drop_aead(&aead_ctx->aead_spawn);
946 kfree(aead_instance(inst));
947 return;
948 default:
949 crypto_drop_spawn(&ctx->spawn);
950 kfree(inst);
951 }
952}
953
954static struct crypto_template cryptd_tmpl = {
955 .name = "cryptd",
956 .create = cryptd_create,
957 .free = cryptd_free,
958 .module = THIS_MODULE,
959};
960
961struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
962 u32 type, u32 mask)
963{
964 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
965 struct cryptd_skcipher_ctx *ctx;
966 struct crypto_skcipher *tfm;
967
968 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
969 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
970 return ERR_PTR(-EINVAL);
971
972 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
973 if (IS_ERR(tfm))
974 return ERR_CAST(tfm);
975
976 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
977 crypto_free_skcipher(tfm);
978 return ERR_PTR(-EINVAL);
979 }
980
981 ctx = crypto_skcipher_ctx(tfm);
982 refcount_set(&ctx->refcnt, 1);
983
984 return container_of(tfm, struct cryptd_skcipher, base);
985}
986EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
987
988struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
989{
990 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
991
992 return &ctx->child->base;
993}
994EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
995
996bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
997{
998 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
999
1000 return refcount_read(&ctx->refcnt) - 1;
1001}
1002EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1003
1004void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1005{
1006 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1007
1008 if (refcount_dec_and_test(&ctx->refcnt))
1009 crypto_free_skcipher(&tfm->base);
1010}
1011EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1012
1013struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1014 u32 type, u32 mask)
1015{
1016 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1017 struct cryptd_hash_ctx *ctx;
1018 struct crypto_ahash *tfm;
1019
1020 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1021 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1022 return ERR_PTR(-EINVAL);
1023 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1024 if (IS_ERR(tfm))
1025 return ERR_CAST(tfm);
1026 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1027 crypto_free_ahash(tfm);
1028 return ERR_PTR(-EINVAL);
1029 }
1030
1031 ctx = crypto_ahash_ctx(tfm);
1032 refcount_set(&ctx->refcnt, 1);
1033
1034 return __cryptd_ahash_cast(tfm);
1035}
1036EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1037
1038struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1039{
1040 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1041
1042 return ctx->child;
1043}
1044EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1045
1046struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1047{
1048 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1049 return &rctx->desc;
1050}
1051EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1052
1053bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1054{
1055 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1056
1057 return refcount_read(&ctx->refcnt) - 1;
1058}
1059EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1060
1061void cryptd_free_ahash(struct cryptd_ahash *tfm)
1062{
1063 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1064
1065 if (refcount_dec_and_test(&ctx->refcnt))
1066 crypto_free_ahash(&tfm->base);
1067}
1068EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1069
1070struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1071 u32 type, u32 mask)
1072{
1073 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1074 struct cryptd_aead_ctx *ctx;
1075 struct crypto_aead *tfm;
1076
1077 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1078 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1079 return ERR_PTR(-EINVAL);
1080 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1081 if (IS_ERR(tfm))
1082 return ERR_CAST(tfm);
1083 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1084 crypto_free_aead(tfm);
1085 return ERR_PTR(-EINVAL);
1086 }
1087
1088 ctx = crypto_aead_ctx(tfm);
1089 refcount_set(&ctx->refcnt, 1);
1090
1091 return __cryptd_aead_cast(tfm);
1092}
1093EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1094
1095struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1096{
1097 struct cryptd_aead_ctx *ctx;
1098 ctx = crypto_aead_ctx(&tfm->base);
1099 return ctx->child;
1100}
1101EXPORT_SYMBOL_GPL(cryptd_aead_child);
1102
1103bool cryptd_aead_queued(struct cryptd_aead *tfm)
1104{
1105 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1106
1107 return refcount_read(&ctx->refcnt) - 1;
1108}
1109EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1110
1111void cryptd_free_aead(struct cryptd_aead *tfm)
1112{
1113 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1114
1115 if (refcount_dec_and_test(&ctx->refcnt))
1116 crypto_free_aead(&tfm->base);
1117}
1118EXPORT_SYMBOL_GPL(cryptd_free_aead);
1119
1120static int __init cryptd_init(void)
1121{
1122 int err;
1123
1124 cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1125 1);
1126 if (!cryptd_wq)
1127 return -ENOMEM;
1128
1129 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1130 if (err)
1131 goto err_destroy_wq;
1132
1133 err = crypto_register_template(&cryptd_tmpl);
1134 if (err)
1135 goto err_fini_queue;
1136
1137 return 0;
1138
1139err_fini_queue:
1140 cryptd_fini_queue(&queue);
1141err_destroy_wq:
1142 destroy_workqueue(cryptd_wq);
1143 return err;
1144}
1145
1146static void __exit cryptd_exit(void)
1147{
1148 destroy_workqueue(cryptd_wq);
1149 cryptd_fini_queue(&queue);
1150 crypto_unregister_template(&cryptd_tmpl);
1151}
1152
1153subsys_initcall(cryptd_init);
1154module_exit(cryptd_exit);
1155
1156MODULE_LICENSE("GPL");
1157MODULE_DESCRIPTION("Software async crypto daemon");
1158MODULE_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");