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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Software async crypto daemon.
4 *
5 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
6 *
7 * Added AEAD support to cryptd.
8 * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
9 * Adrian Hoban <adrian.hoban@intel.com>
10 * Gabriele Paoloni <gabriele.paoloni@intel.com>
11 * Aidan O'Mahony (aidan.o.mahony@intel.com)
12 * Copyright (c) 2010, Intel Corporation.
13 */
14
15#include <crypto/internal/hash.h>
16#include <crypto/internal/aead.h>
17#include <crypto/internal/skcipher.h>
18#include <crypto/cryptd.h>
19#include <linux/refcount.h>
20#include <linux/err.h>
21#include <linux/init.h>
22#include <linux/kernel.h>
23#include <linux/list.h>
24#include <linux/module.h>
25#include <linux/scatterlist.h>
26#include <linux/sched.h>
27#include <linux/slab.h>
28#include <linux/workqueue.h>
29
30static unsigned int cryptd_max_cpu_qlen = 1000;
31module_param(cryptd_max_cpu_qlen, uint, 0);
32MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
33
34static struct workqueue_struct *cryptd_wq;
35
36struct cryptd_cpu_queue {
37 struct crypto_queue queue;
38 struct work_struct work;
39};
40
41struct cryptd_queue {
42 /*
43 * Protected by disabling BH to allow enqueueing from softinterrupt and
44 * dequeuing from kworker (cryptd_queue_worker()).
45 */
46 struct cryptd_cpu_queue __percpu *cpu_queue;
47};
48
49struct cryptd_instance_ctx {
50 struct crypto_spawn spawn;
51 struct cryptd_queue *queue;
52};
53
54struct skcipherd_instance_ctx {
55 struct crypto_skcipher_spawn spawn;
56 struct cryptd_queue *queue;
57};
58
59struct hashd_instance_ctx {
60 struct crypto_shash_spawn spawn;
61 struct cryptd_queue *queue;
62};
63
64struct aead_instance_ctx {
65 struct crypto_aead_spawn aead_spawn;
66 struct cryptd_queue *queue;
67};
68
69struct cryptd_skcipher_ctx {
70 refcount_t refcnt;
71 struct crypto_skcipher *child;
72};
73
74struct cryptd_skcipher_request_ctx {
75 crypto_completion_t complete;
76 struct skcipher_request req;
77};
78
79struct cryptd_hash_ctx {
80 refcount_t refcnt;
81 struct crypto_shash *child;
82};
83
84struct cryptd_hash_request_ctx {
85 crypto_completion_t complete;
86 struct shash_desc desc;
87};
88
89struct cryptd_aead_ctx {
90 refcount_t refcnt;
91 struct crypto_aead *child;
92};
93
94struct cryptd_aead_request_ctx {
95 crypto_completion_t complete;
96};
97
98static void cryptd_queue_worker(struct work_struct *work);
99
100static int cryptd_init_queue(struct cryptd_queue *queue,
101 unsigned int max_cpu_qlen)
102{
103 int cpu;
104 struct cryptd_cpu_queue *cpu_queue;
105
106 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
107 if (!queue->cpu_queue)
108 return -ENOMEM;
109 for_each_possible_cpu(cpu) {
110 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
111 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
112 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
113 }
114 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
115 return 0;
116}
117
118static void cryptd_fini_queue(struct cryptd_queue *queue)
119{
120 int cpu;
121 struct cryptd_cpu_queue *cpu_queue;
122
123 for_each_possible_cpu(cpu) {
124 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
125 BUG_ON(cpu_queue->queue.qlen);
126 }
127 free_percpu(queue->cpu_queue);
128}
129
130static int cryptd_enqueue_request(struct cryptd_queue *queue,
131 struct crypto_async_request *request)
132{
133 int err;
134 struct cryptd_cpu_queue *cpu_queue;
135 refcount_t *refcnt;
136
137 local_bh_disable();
138 cpu_queue = this_cpu_ptr(queue->cpu_queue);
139 err = crypto_enqueue_request(&cpu_queue->queue, request);
140
141 refcnt = crypto_tfm_ctx(request->tfm);
142
143 if (err == -ENOSPC)
144 goto out;
145
146 queue_work_on(smp_processor_id(), cryptd_wq, &cpu_queue->work);
147
148 if (!refcount_read(refcnt))
149 goto out;
150
151 refcount_inc(refcnt);
152
153out:
154 local_bh_enable();
155
156 return err;
157}
158
159/* Called in workqueue context, do one real cryption work (via
160 * req->complete) and reschedule itself if there are more work to
161 * do. */
162static void cryptd_queue_worker(struct work_struct *work)
163{
164 struct cryptd_cpu_queue *cpu_queue;
165 struct crypto_async_request *req, *backlog;
166
167 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
168 /*
169 * Only handle one request at a time to avoid hogging crypto workqueue.
170 */
171 local_bh_disable();
172 backlog = crypto_get_backlog(&cpu_queue->queue);
173 req = crypto_dequeue_request(&cpu_queue->queue);
174 local_bh_enable();
175
176 if (!req)
177 return;
178
179 if (backlog)
180 backlog->complete(backlog, -EINPROGRESS);
181 req->complete(req, 0);
182
183 if (cpu_queue->queue.qlen)
184 queue_work(cryptd_wq, &cpu_queue->work);
185}
186
187static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
188{
189 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
190 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
191 return ictx->queue;
192}
193
194static void cryptd_type_and_mask(struct crypto_attr_type *algt,
195 u32 *type, u32 *mask)
196{
197 /*
198 * cryptd is allowed to wrap internal algorithms, but in that case the
199 * resulting cryptd instance will be marked as internal as well.
200 */
201 *type = algt->type & CRYPTO_ALG_INTERNAL;
202 *mask = algt->mask & CRYPTO_ALG_INTERNAL;
203
204 /* No point in cryptd wrapping an algorithm that's already async. */
205 *mask |= CRYPTO_ALG_ASYNC;
206
207 *mask |= crypto_algt_inherited_mask(algt);
208}
209
210static int cryptd_init_instance(struct crypto_instance *inst,
211 struct crypto_alg *alg)
212{
213 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
214 "cryptd(%s)",
215 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
216 return -ENAMETOOLONG;
217
218 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
219
220 inst->alg.cra_priority = alg->cra_priority + 50;
221 inst->alg.cra_blocksize = alg->cra_blocksize;
222 inst->alg.cra_alignmask = alg->cra_alignmask;
223
224 return 0;
225}
226
227static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
228 const u8 *key, unsigned int keylen)
229{
230 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
231 struct crypto_skcipher *child = ctx->child;
232
233 crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
234 crypto_skcipher_set_flags(child,
235 crypto_skcipher_get_flags(parent) &
236 CRYPTO_TFM_REQ_MASK);
237 return crypto_skcipher_setkey(child, key, keylen);
238}
239
240static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
241{
242 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
243 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
244 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
245 int refcnt = refcount_read(&ctx->refcnt);
246
247 local_bh_disable();
248 rctx->complete(&req->base, err);
249 local_bh_enable();
250
251 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
252 crypto_free_skcipher(tfm);
253}
254
255static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
256 int err)
257{
258 struct skcipher_request *req = skcipher_request_cast(base);
259 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
260 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
261 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
262 struct skcipher_request *subreq = &rctx->req;
263 struct crypto_skcipher *child = ctx->child;
264
265 if (unlikely(err == -EINPROGRESS))
266 goto out;
267
268 skcipher_request_set_tfm(subreq, child);
269 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
270 NULL, NULL);
271 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
272 req->iv);
273
274 err = crypto_skcipher_encrypt(subreq);
275 skcipher_request_zero(subreq);
276
277 req->base.complete = rctx->complete;
278
279out:
280 cryptd_skcipher_complete(req, err);
281}
282
283static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
284 int err)
285{
286 struct skcipher_request *req = skcipher_request_cast(base);
287 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
288 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
289 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
290 struct skcipher_request *subreq = &rctx->req;
291 struct crypto_skcipher *child = ctx->child;
292
293 if (unlikely(err == -EINPROGRESS))
294 goto out;
295
296 skcipher_request_set_tfm(subreq, child);
297 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
298 NULL, NULL);
299 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
300 req->iv);
301
302 err = crypto_skcipher_decrypt(subreq);
303 skcipher_request_zero(subreq);
304
305 req->base.complete = rctx->complete;
306
307out:
308 cryptd_skcipher_complete(req, err);
309}
310
311static int cryptd_skcipher_enqueue(struct skcipher_request *req,
312 crypto_completion_t compl)
313{
314 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
315 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
316 struct cryptd_queue *queue;
317
318 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
319 rctx->complete = req->base.complete;
320 req->base.complete = compl;
321
322 return cryptd_enqueue_request(queue, &req->base);
323}
324
325static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
326{
327 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
328}
329
330static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
331{
332 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
333}
334
335static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
336{
337 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
338 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
339 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
340 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
341 struct crypto_skcipher *cipher;
342
343 cipher = crypto_spawn_skcipher(spawn);
344 if (IS_ERR(cipher))
345 return PTR_ERR(cipher);
346
347 ctx->child = cipher;
348 crypto_skcipher_set_reqsize(
349 tfm, sizeof(struct cryptd_skcipher_request_ctx) +
350 crypto_skcipher_reqsize(cipher));
351 return 0;
352}
353
354static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
355{
356 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
357
358 crypto_free_skcipher(ctx->child);
359}
360
361static void cryptd_skcipher_free(struct skcipher_instance *inst)
362{
363 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
364
365 crypto_drop_skcipher(&ctx->spawn);
366 kfree(inst);
367}
368
369static int cryptd_create_skcipher(struct crypto_template *tmpl,
370 struct rtattr **tb,
371 struct crypto_attr_type *algt,
372 struct cryptd_queue *queue)
373{
374 struct skcipherd_instance_ctx *ctx;
375 struct skcipher_instance *inst;
376 struct skcipher_alg *alg;
377 u32 type;
378 u32 mask;
379 int err;
380
381 cryptd_type_and_mask(algt, &type, &mask);
382
383 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
384 if (!inst)
385 return -ENOMEM;
386
387 ctx = skcipher_instance_ctx(inst);
388 ctx->queue = queue;
389
390 err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
391 crypto_attr_alg_name(tb[1]), type, mask);
392 if (err)
393 goto err_free_inst;
394
395 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
396 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
397 if (err)
398 goto err_free_inst;
399
400 inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
401 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
402 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
403 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
404 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
405 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
406
407 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
408
409 inst->alg.init = cryptd_skcipher_init_tfm;
410 inst->alg.exit = cryptd_skcipher_exit_tfm;
411
412 inst->alg.setkey = cryptd_skcipher_setkey;
413 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
414 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
415
416 inst->free = cryptd_skcipher_free;
417
418 err = skcipher_register_instance(tmpl, inst);
419 if (err) {
420err_free_inst:
421 cryptd_skcipher_free(inst);
422 }
423 return err;
424}
425
426static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
427{
428 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
429 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
430 struct crypto_shash_spawn *spawn = &ictx->spawn;
431 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
432 struct crypto_shash *hash;
433
434 hash = crypto_spawn_shash(spawn);
435 if (IS_ERR(hash))
436 return PTR_ERR(hash);
437
438 ctx->child = hash;
439 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
440 sizeof(struct cryptd_hash_request_ctx) +
441 crypto_shash_descsize(hash));
442 return 0;
443}
444
445static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
446{
447 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
448
449 crypto_free_shash(ctx->child);
450}
451
452static int cryptd_hash_setkey(struct crypto_ahash *parent,
453 const u8 *key, unsigned int keylen)
454{
455 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
456 struct crypto_shash *child = ctx->child;
457
458 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
459 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
460 CRYPTO_TFM_REQ_MASK);
461 return crypto_shash_setkey(child, key, keylen);
462}
463
464static int cryptd_hash_enqueue(struct ahash_request *req,
465 crypto_completion_t compl)
466{
467 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
468 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
469 struct cryptd_queue *queue =
470 cryptd_get_queue(crypto_ahash_tfm(tfm));
471
472 rctx->complete = req->base.complete;
473 req->base.complete = compl;
474
475 return cryptd_enqueue_request(queue, &req->base);
476}
477
478static void cryptd_hash_complete(struct ahash_request *req, int err)
479{
480 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
481 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
482 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
483 int refcnt = refcount_read(&ctx->refcnt);
484
485 local_bh_disable();
486 rctx->complete(&req->base, err);
487 local_bh_enable();
488
489 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
490 crypto_free_ahash(tfm);
491}
492
493static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
494{
495 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
496 struct crypto_shash *child = ctx->child;
497 struct ahash_request *req = ahash_request_cast(req_async);
498 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
499 struct shash_desc *desc = &rctx->desc;
500
501 if (unlikely(err == -EINPROGRESS))
502 goto out;
503
504 desc->tfm = child;
505
506 err = crypto_shash_init(desc);
507
508 req->base.complete = rctx->complete;
509
510out:
511 cryptd_hash_complete(req, err);
512}
513
514static int cryptd_hash_init_enqueue(struct ahash_request *req)
515{
516 return cryptd_hash_enqueue(req, cryptd_hash_init);
517}
518
519static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
520{
521 struct ahash_request *req = ahash_request_cast(req_async);
522 struct cryptd_hash_request_ctx *rctx;
523
524 rctx = ahash_request_ctx(req);
525
526 if (unlikely(err == -EINPROGRESS))
527 goto out;
528
529 err = shash_ahash_update(req, &rctx->desc);
530
531 req->base.complete = rctx->complete;
532
533out:
534 cryptd_hash_complete(req, err);
535}
536
537static int cryptd_hash_update_enqueue(struct ahash_request *req)
538{
539 return cryptd_hash_enqueue(req, cryptd_hash_update);
540}
541
542static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
543{
544 struct ahash_request *req = ahash_request_cast(req_async);
545 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
546
547 if (unlikely(err == -EINPROGRESS))
548 goto out;
549
550 err = crypto_shash_final(&rctx->desc, req->result);
551
552 req->base.complete = rctx->complete;
553
554out:
555 cryptd_hash_complete(req, err);
556}
557
558static int cryptd_hash_final_enqueue(struct ahash_request *req)
559{
560 return cryptd_hash_enqueue(req, cryptd_hash_final);
561}
562
563static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
564{
565 struct ahash_request *req = ahash_request_cast(req_async);
566 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
567
568 if (unlikely(err == -EINPROGRESS))
569 goto out;
570
571 err = shash_ahash_finup(req, &rctx->desc);
572
573 req->base.complete = rctx->complete;
574
575out:
576 cryptd_hash_complete(req, err);
577}
578
579static int cryptd_hash_finup_enqueue(struct ahash_request *req)
580{
581 return cryptd_hash_enqueue(req, cryptd_hash_finup);
582}
583
584static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
585{
586 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
587 struct crypto_shash *child = ctx->child;
588 struct ahash_request *req = ahash_request_cast(req_async);
589 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
590 struct shash_desc *desc = &rctx->desc;
591
592 if (unlikely(err == -EINPROGRESS))
593 goto out;
594
595 desc->tfm = child;
596
597 err = shash_ahash_digest(req, desc);
598
599 req->base.complete = rctx->complete;
600
601out:
602 cryptd_hash_complete(req, err);
603}
604
605static int cryptd_hash_digest_enqueue(struct ahash_request *req)
606{
607 return cryptd_hash_enqueue(req, cryptd_hash_digest);
608}
609
610static int cryptd_hash_export(struct ahash_request *req, void *out)
611{
612 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
613
614 return crypto_shash_export(&rctx->desc, out);
615}
616
617static int cryptd_hash_import(struct ahash_request *req, const void *in)
618{
619 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
620 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
621 struct shash_desc *desc = cryptd_shash_desc(req);
622
623 desc->tfm = ctx->child;
624
625 return crypto_shash_import(desc, in);
626}
627
628static void cryptd_hash_free(struct ahash_instance *inst)
629{
630 struct hashd_instance_ctx *ctx = ahash_instance_ctx(inst);
631
632 crypto_drop_shash(&ctx->spawn);
633 kfree(inst);
634}
635
636static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
637 struct crypto_attr_type *algt,
638 struct cryptd_queue *queue)
639{
640 struct hashd_instance_ctx *ctx;
641 struct ahash_instance *inst;
642 struct shash_alg *alg;
643 u32 type;
644 u32 mask;
645 int err;
646
647 cryptd_type_and_mask(algt, &type, &mask);
648
649 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
650 if (!inst)
651 return -ENOMEM;
652
653 ctx = ahash_instance_ctx(inst);
654 ctx->queue = queue;
655
656 err = crypto_grab_shash(&ctx->spawn, ahash_crypto_instance(inst),
657 crypto_attr_alg_name(tb[1]), type, mask);
658 if (err)
659 goto err_free_inst;
660 alg = crypto_spawn_shash_alg(&ctx->spawn);
661
662 err = cryptd_init_instance(ahash_crypto_instance(inst), &alg->base);
663 if (err)
664 goto err_free_inst;
665
666 inst->alg.halg.base.cra_flags |= CRYPTO_ALG_ASYNC |
667 (alg->base.cra_flags & (CRYPTO_ALG_INTERNAL|
668 CRYPTO_ALG_OPTIONAL_KEY));
669 inst->alg.halg.digestsize = alg->digestsize;
670 inst->alg.halg.statesize = alg->statesize;
671 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
672
673 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
674 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
675
676 inst->alg.init = cryptd_hash_init_enqueue;
677 inst->alg.update = cryptd_hash_update_enqueue;
678 inst->alg.final = cryptd_hash_final_enqueue;
679 inst->alg.finup = cryptd_hash_finup_enqueue;
680 inst->alg.export = cryptd_hash_export;
681 inst->alg.import = cryptd_hash_import;
682 if (crypto_shash_alg_has_setkey(alg))
683 inst->alg.setkey = cryptd_hash_setkey;
684 inst->alg.digest = cryptd_hash_digest_enqueue;
685
686 inst->free = cryptd_hash_free;
687
688 err = ahash_register_instance(tmpl, inst);
689 if (err) {
690err_free_inst:
691 cryptd_hash_free(inst);
692 }
693 return err;
694}
695
696static int cryptd_aead_setkey(struct crypto_aead *parent,
697 const u8 *key, unsigned int keylen)
698{
699 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
700 struct crypto_aead *child = ctx->child;
701
702 return crypto_aead_setkey(child, key, keylen);
703}
704
705static int cryptd_aead_setauthsize(struct crypto_aead *parent,
706 unsigned int authsize)
707{
708 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
709 struct crypto_aead *child = ctx->child;
710
711 return crypto_aead_setauthsize(child, authsize);
712}
713
714static void cryptd_aead_crypt(struct aead_request *req,
715 struct crypto_aead *child,
716 int err,
717 int (*crypt)(struct aead_request *req))
718{
719 struct cryptd_aead_request_ctx *rctx;
720 struct cryptd_aead_ctx *ctx;
721 crypto_completion_t compl;
722 struct crypto_aead *tfm;
723 int refcnt;
724
725 rctx = aead_request_ctx(req);
726 compl = rctx->complete;
727
728 tfm = crypto_aead_reqtfm(req);
729
730 if (unlikely(err == -EINPROGRESS))
731 goto out;
732 aead_request_set_tfm(req, child);
733 err = crypt( req );
734
735out:
736 ctx = crypto_aead_ctx(tfm);
737 refcnt = refcount_read(&ctx->refcnt);
738
739 local_bh_disable();
740 compl(&req->base, err);
741 local_bh_enable();
742
743 if (err != -EINPROGRESS && refcnt && refcount_dec_and_test(&ctx->refcnt))
744 crypto_free_aead(tfm);
745}
746
747static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
748{
749 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
750 struct crypto_aead *child = ctx->child;
751 struct aead_request *req;
752
753 req = container_of(areq, struct aead_request, base);
754 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
755}
756
757static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
758{
759 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
760 struct crypto_aead *child = ctx->child;
761 struct aead_request *req;
762
763 req = container_of(areq, struct aead_request, base);
764 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
765}
766
767static int cryptd_aead_enqueue(struct aead_request *req,
768 crypto_completion_t compl)
769{
770 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
771 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
772 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
773
774 rctx->complete = req->base.complete;
775 req->base.complete = compl;
776 return cryptd_enqueue_request(queue, &req->base);
777}
778
779static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
780{
781 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
782}
783
784static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
785{
786 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
787}
788
789static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
790{
791 struct aead_instance *inst = aead_alg_instance(tfm);
792 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
793 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
794 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
795 struct crypto_aead *cipher;
796
797 cipher = crypto_spawn_aead(spawn);
798 if (IS_ERR(cipher))
799 return PTR_ERR(cipher);
800
801 ctx->child = cipher;
802 crypto_aead_set_reqsize(
803 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
804 crypto_aead_reqsize(cipher)));
805 return 0;
806}
807
808static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
809{
810 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
811 crypto_free_aead(ctx->child);
812}
813
814static void cryptd_aead_free(struct aead_instance *inst)
815{
816 struct aead_instance_ctx *ctx = aead_instance_ctx(inst);
817
818 crypto_drop_aead(&ctx->aead_spawn);
819 kfree(inst);
820}
821
822static int cryptd_create_aead(struct crypto_template *tmpl,
823 struct rtattr **tb,
824 struct crypto_attr_type *algt,
825 struct cryptd_queue *queue)
826{
827 struct aead_instance_ctx *ctx;
828 struct aead_instance *inst;
829 struct aead_alg *alg;
830 u32 type;
831 u32 mask;
832 int err;
833
834 cryptd_type_and_mask(algt, &type, &mask);
835
836 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
837 if (!inst)
838 return -ENOMEM;
839
840 ctx = aead_instance_ctx(inst);
841 ctx->queue = queue;
842
843 err = crypto_grab_aead(&ctx->aead_spawn, aead_crypto_instance(inst),
844 crypto_attr_alg_name(tb[1]), type, mask);
845 if (err)
846 goto err_free_inst;
847
848 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
849 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
850 if (err)
851 goto err_free_inst;
852
853 inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC |
854 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
855 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
856
857 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
858 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
859
860 inst->alg.init = cryptd_aead_init_tfm;
861 inst->alg.exit = cryptd_aead_exit_tfm;
862 inst->alg.setkey = cryptd_aead_setkey;
863 inst->alg.setauthsize = cryptd_aead_setauthsize;
864 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
865 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
866
867 inst->free = cryptd_aead_free;
868
869 err = aead_register_instance(tmpl, inst);
870 if (err) {
871err_free_inst:
872 cryptd_aead_free(inst);
873 }
874 return err;
875}
876
877static struct cryptd_queue queue;
878
879static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
880{
881 struct crypto_attr_type *algt;
882
883 algt = crypto_get_attr_type(tb);
884 if (IS_ERR(algt))
885 return PTR_ERR(algt);
886
887 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
888 case CRYPTO_ALG_TYPE_SKCIPHER:
889 return cryptd_create_skcipher(tmpl, tb, algt, &queue);
890 case CRYPTO_ALG_TYPE_HASH:
891 return cryptd_create_hash(tmpl, tb, algt, &queue);
892 case CRYPTO_ALG_TYPE_AEAD:
893 return cryptd_create_aead(tmpl, tb, algt, &queue);
894 }
895
896 return -EINVAL;
897}
898
899static struct crypto_template cryptd_tmpl = {
900 .name = "cryptd",
901 .create = cryptd_create,
902 .module = THIS_MODULE,
903};
904
905struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
906 u32 type, u32 mask)
907{
908 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
909 struct cryptd_skcipher_ctx *ctx;
910 struct crypto_skcipher *tfm;
911
912 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
913 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
914 return ERR_PTR(-EINVAL);
915
916 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
917 if (IS_ERR(tfm))
918 return ERR_CAST(tfm);
919
920 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
921 crypto_free_skcipher(tfm);
922 return ERR_PTR(-EINVAL);
923 }
924
925 ctx = crypto_skcipher_ctx(tfm);
926 refcount_set(&ctx->refcnt, 1);
927
928 return container_of(tfm, struct cryptd_skcipher, base);
929}
930EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
931
932struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
933{
934 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
935
936 return ctx->child;
937}
938EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
939
940bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
941{
942 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
943
944 return refcount_read(&ctx->refcnt) - 1;
945}
946EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
947
948void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
949{
950 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
951
952 if (refcount_dec_and_test(&ctx->refcnt))
953 crypto_free_skcipher(&tfm->base);
954}
955EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
956
957struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
958 u32 type, u32 mask)
959{
960 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
961 struct cryptd_hash_ctx *ctx;
962 struct crypto_ahash *tfm;
963
964 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
965 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
966 return ERR_PTR(-EINVAL);
967 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
968 if (IS_ERR(tfm))
969 return ERR_CAST(tfm);
970 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
971 crypto_free_ahash(tfm);
972 return ERR_PTR(-EINVAL);
973 }
974
975 ctx = crypto_ahash_ctx(tfm);
976 refcount_set(&ctx->refcnt, 1);
977
978 return __cryptd_ahash_cast(tfm);
979}
980EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
981
982struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
983{
984 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
985
986 return ctx->child;
987}
988EXPORT_SYMBOL_GPL(cryptd_ahash_child);
989
990struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
991{
992 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
993 return &rctx->desc;
994}
995EXPORT_SYMBOL_GPL(cryptd_shash_desc);
996
997bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
998{
999 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1000
1001 return refcount_read(&ctx->refcnt) - 1;
1002}
1003EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1004
1005void cryptd_free_ahash(struct cryptd_ahash *tfm)
1006{
1007 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1008
1009 if (refcount_dec_and_test(&ctx->refcnt))
1010 crypto_free_ahash(&tfm->base);
1011}
1012EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1013
1014struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1015 u32 type, u32 mask)
1016{
1017 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1018 struct cryptd_aead_ctx *ctx;
1019 struct crypto_aead *tfm;
1020
1021 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1022 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1023 return ERR_PTR(-EINVAL);
1024 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1025 if (IS_ERR(tfm))
1026 return ERR_CAST(tfm);
1027 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1028 crypto_free_aead(tfm);
1029 return ERR_PTR(-EINVAL);
1030 }
1031
1032 ctx = crypto_aead_ctx(tfm);
1033 refcount_set(&ctx->refcnt, 1);
1034
1035 return __cryptd_aead_cast(tfm);
1036}
1037EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1038
1039struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1040{
1041 struct cryptd_aead_ctx *ctx;
1042 ctx = crypto_aead_ctx(&tfm->base);
1043 return ctx->child;
1044}
1045EXPORT_SYMBOL_GPL(cryptd_aead_child);
1046
1047bool cryptd_aead_queued(struct cryptd_aead *tfm)
1048{
1049 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1050
1051 return refcount_read(&ctx->refcnt) - 1;
1052}
1053EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1054
1055void cryptd_free_aead(struct cryptd_aead *tfm)
1056{
1057 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1058
1059 if (refcount_dec_and_test(&ctx->refcnt))
1060 crypto_free_aead(&tfm->base);
1061}
1062EXPORT_SYMBOL_GPL(cryptd_free_aead);
1063
1064static int __init cryptd_init(void)
1065{
1066 int err;
1067
1068 cryptd_wq = alloc_workqueue("cryptd", WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE,
1069 1);
1070 if (!cryptd_wq)
1071 return -ENOMEM;
1072
1073 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
1074 if (err)
1075 goto err_destroy_wq;
1076
1077 err = crypto_register_template(&cryptd_tmpl);
1078 if (err)
1079 goto err_fini_queue;
1080
1081 return 0;
1082
1083err_fini_queue:
1084 cryptd_fini_queue(&queue);
1085err_destroy_wq:
1086 destroy_workqueue(cryptd_wq);
1087 return err;
1088}
1089
1090static void __exit cryptd_exit(void)
1091{
1092 destroy_workqueue(cryptd_wq);
1093 cryptd_fini_queue(&queue);
1094 crypto_unregister_template(&cryptd_tmpl);
1095}
1096
1097subsys_initcall(cryptd_init);
1098module_exit(cryptd_exit);
1099
1100MODULE_LICENSE("GPL");
1101MODULE_DESCRIPTION("Software async crypto daemon");
1102MODULE_ALIAS_CRYPTO("cryptd");
1/*
2 * Software async crypto daemon.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * Added AEAD support to cryptd.
7 * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
8 * Adrian Hoban <adrian.hoban@intel.com>
9 * Gabriele Paoloni <gabriele.paoloni@intel.com>
10 * Aidan O'Mahony (aidan.o.mahony@intel.com)
11 * Copyright (c) 2010, Intel Corporation.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
16 * any later version.
17 *
18 */
19
20#include <crypto/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");