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