projects/linux·blob v2.6.34 · refs

752 lines · 19.1 KiB

1/*
2 * Software async crypto daemon.
3 *
4 * Copyright (c) 2006 Herbert Xu <[email protected]>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 *
11 */
12
13#include <crypto/algapi.h>
14#include <crypto/internal/hash.h>
15#include <crypto/cryptd.h>
16#include <crypto/crypto_wq.h>
17#include <linux/err.h>
18#include <linux/init.h>
19#include <linux/kernel.h>
20#include <linux/list.h>
21#include <linux/module.h>
22#include <linux/scatterlist.h>
23#include <linux/sched.h>
24#include <linux/slab.h>
25
26#define CRYPTD_MAX_CPU_QLEN 100
27
28struct cryptd_cpu_queue {
29 struct crypto_queue queue;
30 struct work_struct work;
31};
32
33struct cryptd_queue {
34 struct cryptd_cpu_queue __percpu *cpu_queue;
35};
36
37struct cryptd_instance_ctx {
38 struct crypto_spawn spawn;
39 struct cryptd_queue *queue;
40};
41
42struct hashd_instance_ctx {
43 struct crypto_shash_spawn spawn;
44 struct cryptd_queue *queue;
45};
46
47struct cryptd_blkcipher_ctx {
48 struct crypto_blkcipher *child;
49};
50
51struct cryptd_blkcipher_request_ctx {
52 crypto_completion_t complete;
53};
54
55struct cryptd_hash_ctx {
56 struct crypto_shash *child;
57};
58
59struct cryptd_hash_request_ctx {
60 crypto_completion_t complete;
61 struct shash_desc desc;
62};
63
64static void cryptd_queue_worker(struct work_struct *work);
65
66static int cryptd_init_queue(struct cryptd_queue *queue,
67 unsigned int max_cpu_qlen)
68{
69 int cpu;
70 struct cryptd_cpu_queue *cpu_queue;
71
72 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
73 if (!queue->cpu_queue)
74 return -ENOMEM;
75 for_each_possible_cpu(cpu) {
76 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
77 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
78 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
79 }
80 return 0;
81}
82
83static void cryptd_fini_queue(struct cryptd_queue *queue)
84{
85 int cpu;
86 struct cryptd_cpu_queue *cpu_queue;
87
88 for_each_possible_cpu(cpu) {
89 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
90 BUG_ON(cpu_queue->queue.qlen);
91 }
92 free_percpu(queue->cpu_queue);
93}
94
95static int cryptd_enqueue_request(struct cryptd_queue *queue,
96 struct crypto_async_request *request)
97{
98 int cpu, err;
99 struct cryptd_cpu_queue *cpu_queue;
100
101 cpu = get_cpu();
102 cpu_queue = this_cpu_ptr(queue->cpu_queue);
103 err = crypto_enqueue_request(&cpu_queue->queue, request);
104 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
105 put_cpu();
106
107 return err;
108}
109
110/* Called in workqueue context, do one real cryption work (via
111 * req->complete) and reschedule itself if there are more work to
112 * do. */
113static void cryptd_queue_worker(struct work_struct *work)
114{
115 struct cryptd_cpu_queue *cpu_queue;
116 struct crypto_async_request *req, *backlog;
117
118 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
119 /* Only handle one request at a time to avoid hogging crypto
120 * workqueue. preempt_disable/enable is used to prevent
121 * being preempted by cryptd_enqueue_request() */
122 preempt_disable();
123 backlog = crypto_get_backlog(&cpu_queue->queue);
124 req = crypto_dequeue_request(&cpu_queue->queue);
125 preempt_enable();
126
127 if (!req)
128 return;
129
130 if (backlog)
131 backlog->complete(backlog, -EINPROGRESS);
132 req->complete(req, 0);
133
134 if (cpu_queue->queue.qlen)
135 queue_work(kcrypto_wq, &cpu_queue->work);
136}
137
138static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
139{
140 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
141 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
142 return ictx->queue;
143}
144
145static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
146 const u8 *key, unsigned int keylen)
147{
148 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
149 struct crypto_blkcipher *child = ctx->child;
150 int err;
151
152 crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
153 crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
154 CRYPTO_TFM_REQ_MASK);
155 err = crypto_blkcipher_setkey(child, key, keylen);
156 crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
157 CRYPTO_TFM_RES_MASK);
158 return err;
159}
160
161static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
162 struct crypto_blkcipher *child,
163 int err,
164 int (*crypt)(struct blkcipher_desc *desc,
165 struct scatterlist *dst,
166 struct scatterlist *src,
167 unsigned int len))
168{
169 struct cryptd_blkcipher_request_ctx *rctx;
170 struct blkcipher_desc desc;
171
172 rctx = ablkcipher_request_ctx(req);
173
174 if (unlikely(err == -EINPROGRESS))
175 goto out;
176
177 desc.tfm = child;
178 desc.info = req->info;
179 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
180
181 err = crypt(&desc, req->dst, req->src, req->nbytes);
182
183 req->base.complete = rctx->complete;
184
185out:
186 local_bh_disable();
187 rctx->complete(&req->base, err);
188 local_bh_enable();
189}
190
191static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
192{
193 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
194 struct crypto_blkcipher *child = ctx->child;
195
196 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
197 crypto_blkcipher_crt(child)->encrypt);
198}
199
200static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
201{
202 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
203 struct crypto_blkcipher *child = ctx->child;
204
205 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
206 crypto_blkcipher_crt(child)->decrypt);
207}
208
209static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
210 crypto_completion_t complete)
211{
212 struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
213 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
214 struct cryptd_queue *queue;
215
216 queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
217 rctx->complete = req->base.complete;
218 req->base.complete = complete;
219
220 return cryptd_enqueue_request(queue, &req->base);
221}
222
223static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
224{
225 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
226}
227
228static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
229{
230 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
231}
232
233static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
234{
235 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
236 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
237 struct crypto_spawn *spawn = &ictx->spawn;
238 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
239 struct crypto_blkcipher *cipher;
240
241 cipher = crypto_spawn_blkcipher(spawn);
242 if (IS_ERR(cipher))
243 return PTR_ERR(cipher);
244
245 ctx->child = cipher;
246 tfm->crt_ablkcipher.reqsize =
247 sizeof(struct cryptd_blkcipher_request_ctx);
248 return 0;
249}
250
251static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
252{
253 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
254
255 crypto_free_blkcipher(ctx->child);
256}
257
258static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
259 unsigned int tail)
260{
261 char *p;
262 struct crypto_instance *inst;
263 int err;
264
265 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
266 if (!p)
267 return ERR_PTR(-ENOMEM);
268
269 inst = (void *)(p + head);
270
271 err = -ENAMETOOLONG;
272 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
273 "cryptd(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
274 goto out_free_inst;
275
276 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
277
278 inst->alg.cra_priority = alg->cra_priority + 50;
279 inst->alg.cra_blocksize = alg->cra_blocksize;
280 inst->alg.cra_alignmask = alg->cra_alignmask;
281
282out:
283 return p;
284
285out_free_inst:
286 kfree(p);
287 p = ERR_PTR(err);
288 goto out;
289}
290
291static int cryptd_create_blkcipher(struct crypto_template *tmpl,
292 struct rtattr **tb,
293 struct cryptd_queue *queue)
294{
295 struct cryptd_instance_ctx *ctx;
296 struct crypto_instance *inst;
297 struct crypto_alg *alg;
298 int err;
299
300 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER,
301 CRYPTO_ALG_TYPE_MASK);
302 if (IS_ERR(alg))
303 return PTR_ERR(alg);
304
305 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
306 err = PTR_ERR(inst);
307 if (IS_ERR(inst))
308 goto out_put_alg;
309
310 ctx = crypto_instance_ctx(inst);
311 ctx->queue = queue;
312
313 err = crypto_init_spawn(&ctx->spawn, alg, inst,
314 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
315 if (err)
316 goto out_free_inst;
317
318 inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
319 inst->alg.cra_type = &crypto_ablkcipher_type;
320
321 inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
322 inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
323 inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
324
325 inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
326
327 inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
328
329 inst->alg.cra_init = cryptd_blkcipher_init_tfm;
330 inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
331
332 inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
333 inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
334 inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
335
336 err = crypto_register_instance(tmpl, inst);
337 if (err) {
338 crypto_drop_spawn(&ctx->spawn);
339out_free_inst:
340 kfree(inst);
341 }
342
343out_put_alg:
344 crypto_mod_put(alg);
345 return err;
346}
347
348static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
349{
350 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
351 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
352 struct crypto_shash_spawn *spawn = &ictx->spawn;
353 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
354 struct crypto_shash *hash;
355
356 hash = crypto_spawn_shash(spawn);
357 if (IS_ERR(hash))
358 return PTR_ERR(hash);
359
360 ctx->child = hash;
361 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
362 sizeof(struct cryptd_hash_request_ctx) +
363 crypto_shash_descsize(hash));
364 return 0;
365}
366
367static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
368{
369 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
370
371 crypto_free_shash(ctx->child);
372}
373
374static int cryptd_hash_setkey(struct crypto_ahash *parent,
375 const u8 *key, unsigned int keylen)
376{
377 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
378 struct crypto_shash *child = ctx->child;
379 int err;
380
381 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
382 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
383 CRYPTO_TFM_REQ_MASK);
384 err = crypto_shash_setkey(child, key, keylen);
385 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
386 CRYPTO_TFM_RES_MASK);
387 return err;
388}
389
390static int cryptd_hash_enqueue(struct ahash_request *req,
391 crypto_completion_t complete)
392{
393 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
394 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
395 struct cryptd_queue *queue =
396 cryptd_get_queue(crypto_ahash_tfm(tfm));
397
398 rctx->complete = req->base.complete;
399 req->base.complete = complete;
400
401 return cryptd_enqueue_request(queue, &req->base);
402}
403
404static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
405{
406 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
407 struct crypto_shash *child = ctx->child;
408 struct ahash_request *req = ahash_request_cast(req_async);
409 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
410 struct shash_desc *desc = &rctx->desc;
411
412 if (unlikely(err == -EINPROGRESS))
413 goto out;
414
415 desc->tfm = child;
416 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
417
418 err = crypto_shash_init(desc);
419
420 req->base.complete = rctx->complete;
421
422out:
423 local_bh_disable();
424 rctx->complete(&req->base, err);
425 local_bh_enable();
426}
427
428static int cryptd_hash_init_enqueue(struct ahash_request *req)
429{
430 return cryptd_hash_enqueue(req, cryptd_hash_init);
431}
432
433static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
434{
435 struct ahash_request *req = ahash_request_cast(req_async);
436 struct cryptd_hash_request_ctx *rctx;
437
438 rctx = ahash_request_ctx(req);
439
440 if (unlikely(err == -EINPROGRESS))
441 goto out;
442
443 err = shash_ahash_update(req, &rctx->desc);
444
445 req->base.complete = rctx->complete;
446
447out:
448 local_bh_disable();
449 rctx->complete(&req->base, err);
450 local_bh_enable();
451}
452
453static int cryptd_hash_update_enqueue(struct ahash_request *req)
454{
455 return cryptd_hash_enqueue(req, cryptd_hash_update);
456}
457
458static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
459{
460 struct ahash_request *req = ahash_request_cast(req_async);
461 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
462
463 if (unlikely(err == -EINPROGRESS))
464 goto out;
465
466 err = crypto_shash_final(&rctx->desc, req->result);
467
468 req->base.complete = rctx->complete;
469
470out:
471 local_bh_disable();
472 rctx->complete(&req->base, err);
473 local_bh_enable();
474}
475
476static int cryptd_hash_final_enqueue(struct ahash_request *req)
477{
478 return cryptd_hash_enqueue(req, cryptd_hash_final);
479}
480
481static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
482{
483 struct ahash_request *req = ahash_request_cast(req_async);
484 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
485
486 if (unlikely(err == -EINPROGRESS))
487 goto out;
488
489 err = shash_ahash_finup(req, &rctx->desc);
490
491 req->base.complete = rctx->complete;
492
493out:
494 local_bh_disable();
495 rctx->complete(&req->base, err);
496 local_bh_enable();
497}
498
499static int cryptd_hash_finup_enqueue(struct ahash_request *req)
500{
501 return cryptd_hash_enqueue(req, cryptd_hash_finup);
502}
503
504static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
505{
506 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
507 struct crypto_shash *child = ctx->child;
508 struct ahash_request *req = ahash_request_cast(req_async);
509 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
510 struct shash_desc *desc = &rctx->desc;
511
512 if (unlikely(err == -EINPROGRESS))
513 goto out;
514
515 desc->tfm = child;
516 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
517
518 err = shash_ahash_digest(req, desc);
519
520 req->base.complete = rctx->complete;
521
522out:
523 local_bh_disable();
524 rctx->complete(&req->base, err);
525 local_bh_enable();
526}
527
528static int cryptd_hash_digest_enqueue(struct ahash_request *req)
529{
530 return cryptd_hash_enqueue(req, cryptd_hash_digest);
531}
532
533static int cryptd_hash_export(struct ahash_request *req, void *out)
534{
535 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
536
537 return crypto_shash_export(&rctx->desc, out);
538}
539
540static int cryptd_hash_import(struct ahash_request *req, const void *in)
541{
542 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
543
544 return crypto_shash_import(&rctx->desc, in);
545}
546
547static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
548 struct cryptd_queue *queue)
549{
550 struct hashd_instance_ctx *ctx;
551 struct ahash_instance *inst;
552 struct shash_alg *salg;
553 struct crypto_alg *alg;
554 int err;
555
556 salg = shash_attr_alg(tb[1], 0, 0);
557 if (IS_ERR(salg))
558 return PTR_ERR(salg);
559
560 alg = &salg->base;
561 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
562 sizeof(*ctx));
563 err = PTR_ERR(inst);
564 if (IS_ERR(inst))
565 goto out_put_alg;
566
567 ctx = ahash_instance_ctx(inst);
568 ctx->queue = queue;
569
570 err = crypto_init_shash_spawn(&ctx->spawn, salg,
571 ahash_crypto_instance(inst));
572 if (err)
573 goto out_free_inst;
574
575 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC;
576
577 inst->alg.halg.digestsize = salg->digestsize;
578 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
579
580 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
581 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
582
583 inst->alg.init = cryptd_hash_init_enqueue;
584 inst->alg.update = cryptd_hash_update_enqueue;
585 inst->alg.final = cryptd_hash_final_enqueue;
586 inst->alg.finup = cryptd_hash_finup_enqueue;
587 inst->alg.export = cryptd_hash_export;
588 inst->alg.import = cryptd_hash_import;
589 inst->alg.setkey = cryptd_hash_setkey;
590 inst->alg.digest = cryptd_hash_digest_enqueue;
591
592 err = ahash_register_instance(tmpl, inst);
593 if (err) {
594 crypto_drop_shash(&ctx->spawn);
595out_free_inst:
596 kfree(inst);
597 }
598
599out_put_alg:
600 crypto_mod_put(alg);
601 return err;
602}
603
604static struct cryptd_queue queue;
605
606static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
607{
608 struct crypto_attr_type *algt;
609
610 algt = crypto_get_attr_type(tb);
611 if (IS_ERR(algt))
612 return PTR_ERR(algt);
613
614 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
615 case CRYPTO_ALG_TYPE_BLKCIPHER:
616 return cryptd_create_blkcipher(tmpl, tb, &queue);
617 case CRYPTO_ALG_TYPE_DIGEST:
618 return cryptd_create_hash(tmpl, tb, &queue);
619 }
620
621 return -EINVAL;
622}
623
624static void cryptd_free(struct crypto_instance *inst)
625{
626 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
627 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
628
629 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
630 case CRYPTO_ALG_TYPE_AHASH:
631 crypto_drop_shash(&hctx->spawn);
632 kfree(ahash_instance(inst));
633 return;
634 }
635
636 crypto_drop_spawn(&ctx->spawn);
637 kfree(inst);
638}
639
640static struct crypto_template cryptd_tmpl = {
641 .name = "cryptd",
642 .create = cryptd_create,
643 .free = cryptd_free,
644 .module = THIS_MODULE,
645};
646
647struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
648 u32 type, u32 mask)
649{
650 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
651 struct crypto_tfm *tfm;
652
653 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
654 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
655 return ERR_PTR(-EINVAL);
656 type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
657 type |= CRYPTO_ALG_TYPE_BLKCIPHER;
658 mask &= ~CRYPTO_ALG_TYPE_MASK;
659 mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
660 tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
661 if (IS_ERR(tfm))
662 return ERR_CAST(tfm);
663 if (tfm->__crt_alg->cra_module != THIS_MODULE) {
664 crypto_free_tfm(tfm);
665 return ERR_PTR(-EINVAL);
666 }
667
668 return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
669}
670EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
671
672struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
673{
674 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
675 return ctx->child;
676}
677EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
678
679void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
680{
681 crypto_free_ablkcipher(&tfm->base);
682}
683EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
684
685struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
686 u32 type, u32 mask)
687{
688 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
689 struct crypto_ahash *tfm;
690
691 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
692 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
693 return ERR_PTR(-EINVAL);
694 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
695 if (IS_ERR(tfm))
696 return ERR_CAST(tfm);
697 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
698 crypto_free_ahash(tfm);
699 return ERR_PTR(-EINVAL);
700 }
701
702 return __cryptd_ahash_cast(tfm);
703}
704EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
705
706struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
707{
708 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
709
710 return ctx->child;
711}
712EXPORT_SYMBOL_GPL(cryptd_ahash_child);
713
714struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
715{
716 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
717 return &rctx->desc;
718}
719EXPORT_SYMBOL_GPL(cryptd_shash_desc);
720
721void cryptd_free_ahash(struct cryptd_ahash *tfm)
722{
723 crypto_free_ahash(&tfm->base);
724}
725EXPORT_SYMBOL_GPL(cryptd_free_ahash);
726
727static int __init cryptd_init(void)
728{
729 int err;
730
731 err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
732 if (err)
733 return err;
734
735 err = crypto_register_template(&cryptd_tmpl);
736 if (err)
737 cryptd_fini_queue(&queue);
738
739 return err;
740}
741
742static void __exit cryptd_exit(void)
743{
744 cryptd_fini_queue(&queue);
745 crypto_unregister_template(&cryptd_tmpl);
746}
747
748module_init(cryptd_init);
749module_exit(cryptd_exit);
750
751MODULE_LICENSE("GPL");
752MODULE_DESCRIPTION("Software async crypto daemon");