1 /*
2 * Software async crypto daemon.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * Added AEAD support to cryptd.
7 * Authors: Tadeusz Struk (tadeusz.struk@intel.com)
8 * Adrian Hoban <adrian.hoban@intel.com>
9 * Gabriele Paoloni <gabriele.paoloni@intel.com>
10 * Aidan O'Mahony (aidan.o.mahony@intel.com)
11 * Copyright (c) 2010, Intel Corporation.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
16 * any later version.
17 *
18 */
19
20 #include <crypto/internal/hash.h>
21 #include <crypto/internal/aead.h>
22 #include <crypto/internal/skcipher.h>
23 #include <crypto/cryptd.h>
24 #include <crypto/crypto_wq.h>
25 #include <linux/atomic.h>
26 #include <linux/err.h>
27 #include <linux/init.h>
28 #include <linux/kernel.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/scatterlist.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34
35 #define CRYPTD_MAX_CPU_QLEN 1000
36
37 struct cryptd_cpu_queue {
38 struct crypto_queue queue;
39 struct work_struct work;
40 };
41
42 struct cryptd_queue {
43 struct cryptd_cpu_queue __percpu *cpu_queue;
44 };
45
46 struct cryptd_instance_ctx {
47 struct crypto_spawn spawn;
48 struct cryptd_queue *queue;
49 };
50
51 struct skcipherd_instance_ctx {
52 struct crypto_skcipher_spawn spawn;
53 struct cryptd_queue *queue;
54 };
55
56 struct hashd_instance_ctx {
57 struct crypto_shash_spawn spawn;
58 struct cryptd_queue *queue;
59 };
60
61 struct aead_instance_ctx {
62 struct crypto_aead_spawn aead_spawn;
63 struct cryptd_queue *queue;
64 };
65
66 struct cryptd_blkcipher_ctx {
67 atomic_t refcnt;
68 struct crypto_blkcipher *child;
69 };
70
71 struct cryptd_blkcipher_request_ctx {
72 crypto_completion_t complete;
73 };
74
75 struct cryptd_skcipher_ctx {
76 atomic_t refcnt;
77 struct crypto_skcipher *child;
78 };
79
80 struct cryptd_skcipher_request_ctx {
81 crypto_completion_t complete;
82 };
83
84 struct cryptd_hash_ctx {
85 atomic_t refcnt;
86 struct crypto_shash *child;
87 };
88
89 struct cryptd_hash_request_ctx {
90 crypto_completion_t complete;
91 struct shash_desc desc;
92 };
93
94 struct cryptd_aead_ctx {
95 atomic_t refcnt;
96 struct crypto_aead *child;
97 };
98
99 struct cryptd_aead_request_ctx {
100 crypto_completion_t complete;
101 };
102
103 static void cryptd_queue_worker(struct work_struct *work);
104
cryptd_init_queue(struct cryptd_queue * queue,unsigned int max_cpu_qlen)105 static int cryptd_init_queue(struct cryptd_queue *queue,
106 unsigned int max_cpu_qlen)
107 {
108 int cpu;
109 struct cryptd_cpu_queue *cpu_queue;
110
111 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
112 if (!queue->cpu_queue)
113 return -ENOMEM;
114 for_each_possible_cpu(cpu) {
115 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
116 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
117 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
118 }
119 return 0;
120 }
121
cryptd_fini_queue(struct cryptd_queue * queue)122 static void cryptd_fini_queue(struct cryptd_queue *queue)
123 {
124 int cpu;
125 struct cryptd_cpu_queue *cpu_queue;
126
127 for_each_possible_cpu(cpu) {
128 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
129 BUG_ON(cpu_queue->queue.qlen);
130 }
131 free_percpu(queue->cpu_queue);
132 }
133
cryptd_enqueue_request(struct cryptd_queue * queue,struct crypto_async_request * request)134 static int cryptd_enqueue_request(struct cryptd_queue *queue,
135 struct crypto_async_request *request)
136 {
137 int cpu, err;
138 struct cryptd_cpu_queue *cpu_queue;
139 atomic_t *refcnt;
140 bool may_backlog;
141
142 cpu = get_cpu();
143 cpu_queue = this_cpu_ptr(queue->cpu_queue);
144 err = crypto_enqueue_request(&cpu_queue->queue, request);
145
146 refcnt = crypto_tfm_ctx(request->tfm);
147 may_backlog = request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG;
148
149 if (err == -EBUSY && !may_backlog)
150 goto out_put_cpu;
151
152 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
153
154 if (!atomic_read(refcnt))
155 goto out_put_cpu;
156
157 atomic_inc(refcnt);
158
159 out_put_cpu:
160 put_cpu();
161
162 return err;
163 }
164
165 /* Called in workqueue context, do one real cryption work (via
166 * req->complete) and reschedule itself if there are more work to
167 * do. */
cryptd_queue_worker(struct work_struct * work)168 static void cryptd_queue_worker(struct work_struct *work)
169 {
170 struct cryptd_cpu_queue *cpu_queue;
171 struct crypto_async_request *req, *backlog;
172
173 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
174 /*
175 * Only handle one request at a time to avoid hogging crypto workqueue.
176 * preempt_disable/enable is used to prevent being preempted by
177 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
178 * cryptd_enqueue_request() being accessed from software interrupts.
179 */
180 local_bh_disable();
181 preempt_disable();
182 backlog = crypto_get_backlog(&cpu_queue->queue);
183 req = crypto_dequeue_request(&cpu_queue->queue);
184 preempt_enable();
185 local_bh_enable();
186
187 if (!req)
188 return;
189
190 if (backlog)
191 backlog->complete(backlog, -EINPROGRESS);
192 req->complete(req, 0);
193
194 if (cpu_queue->queue.qlen)
195 queue_work(kcrypto_wq, &cpu_queue->work);
196 }
197
cryptd_get_queue(struct crypto_tfm * tfm)198 static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
199 {
200 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
201 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
202 return ictx->queue;
203 }
204
cryptd_check_internal(struct rtattr ** tb,u32 * type,u32 * mask)205 static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
206 u32 *mask)
207 {
208 struct crypto_attr_type *algt;
209
210 algt = crypto_get_attr_type(tb);
211 if (IS_ERR(algt))
212 return;
213
214 *type |= algt->type & CRYPTO_ALG_INTERNAL;
215 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
216 }
217
cryptd_blkcipher_setkey(struct crypto_ablkcipher * parent,const u8 * key,unsigned int keylen)218 static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
219 const u8 *key, unsigned int keylen)
220 {
221 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
222 struct crypto_blkcipher *child = ctx->child;
223 int err;
224
225 crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
226 crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
227 CRYPTO_TFM_REQ_MASK);
228 err = crypto_blkcipher_setkey(child, key, keylen);
229 crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
230 CRYPTO_TFM_RES_MASK);
231 return err;
232 }
233
cryptd_blkcipher_crypt(struct ablkcipher_request * req,struct crypto_blkcipher * child,int err,int (* crypt)(struct blkcipher_desc * desc,struct scatterlist * dst,struct scatterlist * src,unsigned int len))234 static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
235 struct crypto_blkcipher *child,
236 int err,
237 int (*crypt)(struct blkcipher_desc *desc,
238 struct scatterlist *dst,
239 struct scatterlist *src,
240 unsigned int len))
241 {
242 struct cryptd_blkcipher_request_ctx *rctx;
243 struct cryptd_blkcipher_ctx *ctx;
244 struct crypto_ablkcipher *tfm;
245 struct blkcipher_desc desc;
246 int refcnt;
247
248 rctx = ablkcipher_request_ctx(req);
249
250 if (unlikely(err == -EINPROGRESS))
251 goto out;
252
253 desc.tfm = child;
254 desc.info = req->info;
255 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
256
257 err = crypt(&desc, req->dst, req->src, req->nbytes);
258
259 req->base.complete = rctx->complete;
260
261 out:
262 tfm = crypto_ablkcipher_reqtfm(req);
263 ctx = crypto_ablkcipher_ctx(tfm);
264 refcnt = atomic_read(&ctx->refcnt);
265
266 local_bh_disable();
267 rctx->complete(&req->base, err);
268 local_bh_enable();
269
270 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
271 crypto_free_ablkcipher(tfm);
272 }
273
cryptd_blkcipher_encrypt(struct crypto_async_request * req,int err)274 static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
275 {
276 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
277 struct crypto_blkcipher *child = ctx->child;
278
279 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
280 crypto_blkcipher_crt(child)->encrypt);
281 }
282
cryptd_blkcipher_decrypt(struct crypto_async_request * req,int err)283 static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
284 {
285 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
286 struct crypto_blkcipher *child = ctx->child;
287
288 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
289 crypto_blkcipher_crt(child)->decrypt);
290 }
291
cryptd_blkcipher_enqueue(struct ablkcipher_request * req,crypto_completion_t compl)292 static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
293 crypto_completion_t compl)
294 {
295 struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
296 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
297 struct cryptd_queue *queue;
298
299 queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
300 rctx->complete = req->base.complete;
301 req->base.complete = compl;
302
303 return cryptd_enqueue_request(queue, &req->base);
304 }
305
cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request * req)306 static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
307 {
308 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
309 }
310
cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request * req)311 static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
312 {
313 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
314 }
315
cryptd_blkcipher_init_tfm(struct crypto_tfm * tfm)316 static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
317 {
318 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
319 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
320 struct crypto_spawn *spawn = &ictx->spawn;
321 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
322 struct crypto_blkcipher *cipher;
323
324 cipher = crypto_spawn_blkcipher(spawn);
325 if (IS_ERR(cipher))
326 return PTR_ERR(cipher);
327
328 ctx->child = cipher;
329 tfm->crt_ablkcipher.reqsize =
330 sizeof(struct cryptd_blkcipher_request_ctx);
331 return 0;
332 }
333
cryptd_blkcipher_exit_tfm(struct crypto_tfm * tfm)334 static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
335 {
336 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
337
338 crypto_free_blkcipher(ctx->child);
339 }
340
cryptd_init_instance(struct crypto_instance * inst,struct crypto_alg * alg)341 static int cryptd_init_instance(struct crypto_instance *inst,
342 struct crypto_alg *alg)
343 {
344 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
345 "cryptd(%s)",
346 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
347 return -ENAMETOOLONG;
348
349 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
350
351 inst->alg.cra_priority = alg->cra_priority + 50;
352 inst->alg.cra_blocksize = alg->cra_blocksize;
353 inst->alg.cra_alignmask = alg->cra_alignmask;
354
355 return 0;
356 }
357
cryptd_alloc_instance(struct crypto_alg * alg,unsigned int head,unsigned int tail)358 static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
359 unsigned int tail)
360 {
361 char *p;
362 struct crypto_instance *inst;
363 int err;
364
365 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
366 if (!p)
367 return ERR_PTR(-ENOMEM);
368
369 inst = (void *)(p + head);
370
371 err = cryptd_init_instance(inst, alg);
372 if (err)
373 goto out_free_inst;
374
375 out:
376 return p;
377
378 out_free_inst:
379 kfree(p);
380 p = ERR_PTR(err);
381 goto out;
382 }
383
cryptd_create_blkcipher(struct crypto_template * tmpl,struct rtattr ** tb,struct cryptd_queue * queue)384 static int cryptd_create_blkcipher(struct crypto_template *tmpl,
385 struct rtattr **tb,
386 struct cryptd_queue *queue)
387 {
388 struct cryptd_instance_ctx *ctx;
389 struct crypto_instance *inst;
390 struct crypto_alg *alg;
391 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
392 u32 mask = CRYPTO_ALG_TYPE_MASK;
393 int err;
394
395 cryptd_check_internal(tb, &type, &mask);
396
397 alg = crypto_get_attr_alg(tb, type, mask);
398 if (IS_ERR(alg))
399 return PTR_ERR(alg);
400
401 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
402 err = PTR_ERR(inst);
403 if (IS_ERR(inst))
404 goto out_put_alg;
405
406 ctx = crypto_instance_ctx(inst);
407 ctx->queue = queue;
408
409 err = crypto_init_spawn(&ctx->spawn, alg, inst,
410 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
411 if (err)
412 goto out_free_inst;
413
414 type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
415 if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
416 type |= CRYPTO_ALG_INTERNAL;
417 inst->alg.cra_flags = type;
418 inst->alg.cra_type = &crypto_ablkcipher_type;
419
420 inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
421 inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
422 inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
423
424 inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
425
426 inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
427
428 inst->alg.cra_init = cryptd_blkcipher_init_tfm;
429 inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
430
431 inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
432 inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
433 inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
434
435 err = crypto_register_instance(tmpl, inst);
436 if (err) {
437 crypto_drop_spawn(&ctx->spawn);
438 out_free_inst:
439 kfree(inst);
440 }
441
442 out_put_alg:
443 crypto_mod_put(alg);
444 return err;
445 }
446
cryptd_skcipher_setkey(struct crypto_skcipher * parent,const u8 * key,unsigned int keylen)447 static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
448 const u8 *key, unsigned int keylen)
449 {
450 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
451 struct crypto_skcipher *child = ctx->child;
452 int err;
453
454 crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
455 crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
456 CRYPTO_TFM_REQ_MASK);
457 err = crypto_skcipher_setkey(child, key, keylen);
458 crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) &
459 CRYPTO_TFM_RES_MASK);
460 return err;
461 }
462
cryptd_skcipher_complete(struct skcipher_request * req,int err)463 static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
464 {
465 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
466 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
467 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
468 int refcnt = atomic_read(&ctx->refcnt);
469
470 local_bh_disable();
471 rctx->complete(&req->base, err);
472 local_bh_enable();
473
474 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
475 crypto_free_skcipher(tfm);
476 }
477
cryptd_skcipher_encrypt(struct crypto_async_request * base,int err)478 static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
479 int err)
480 {
481 struct skcipher_request *req = skcipher_request_cast(base);
482 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
483 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
484 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
485 struct crypto_skcipher *child = ctx->child;
486 SKCIPHER_REQUEST_ON_STACK(subreq, child);
487
488 if (unlikely(err == -EINPROGRESS))
489 goto out;
490
491 skcipher_request_set_tfm(subreq, child);
492 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
493 NULL, NULL);
494 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
495 req->iv);
496
497 err = crypto_skcipher_encrypt(subreq);
498 skcipher_request_zero(subreq);
499
500 req->base.complete = rctx->complete;
501
502 out:
503 cryptd_skcipher_complete(req, err);
504 }
505
cryptd_skcipher_decrypt(struct crypto_async_request * base,int err)506 static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
507 int err)
508 {
509 struct skcipher_request *req = skcipher_request_cast(base);
510 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
511 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
512 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
513 struct crypto_skcipher *child = ctx->child;
514 SKCIPHER_REQUEST_ON_STACK(subreq, child);
515
516 if (unlikely(err == -EINPROGRESS))
517 goto out;
518
519 skcipher_request_set_tfm(subreq, child);
520 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
521 NULL, NULL);
522 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
523 req->iv);
524
525 err = crypto_skcipher_decrypt(subreq);
526 skcipher_request_zero(subreq);
527
528 req->base.complete = rctx->complete;
529
530 out:
531 cryptd_skcipher_complete(req, err);
532 }
533
cryptd_skcipher_enqueue(struct skcipher_request * req,crypto_completion_t compl)534 static int cryptd_skcipher_enqueue(struct skcipher_request *req,
535 crypto_completion_t compl)
536 {
537 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
538 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
539 struct cryptd_queue *queue;
540
541 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
542 rctx->complete = req->base.complete;
543 req->base.complete = compl;
544
545 return cryptd_enqueue_request(queue, &req->base);
546 }
547
cryptd_skcipher_encrypt_enqueue(struct skcipher_request * req)548 static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
549 {
550 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
551 }
552
cryptd_skcipher_decrypt_enqueue(struct skcipher_request * req)553 static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
554 {
555 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
556 }
557
cryptd_skcipher_init_tfm(struct crypto_skcipher * tfm)558 static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
559 {
560 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
561 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
562 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
563 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
564 struct crypto_skcipher *cipher;
565
566 cipher = crypto_spawn_skcipher(spawn);
567 if (IS_ERR(cipher))
568 return PTR_ERR(cipher);
569
570 ctx->child = cipher;
571 crypto_skcipher_set_reqsize(
572 tfm, sizeof(struct cryptd_skcipher_request_ctx));
573 return 0;
574 }
575
cryptd_skcipher_exit_tfm(struct crypto_skcipher * tfm)576 static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
577 {
578 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
579
580 crypto_free_skcipher(ctx->child);
581 }
582
cryptd_skcipher_free(struct skcipher_instance * inst)583 static void cryptd_skcipher_free(struct skcipher_instance *inst)
584 {
585 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
586
587 crypto_drop_skcipher(&ctx->spawn);
588 kfree(inst);
589 }
590
cryptd_create_skcipher(struct crypto_template * tmpl,struct rtattr ** tb,struct cryptd_queue * queue)591 static int cryptd_create_skcipher(struct crypto_template *tmpl,
592 struct rtattr **tb,
593 struct cryptd_queue *queue)
594 {
595 struct skcipherd_instance_ctx *ctx;
596 struct skcipher_instance *inst;
597 struct skcipher_alg *alg;
598 const char *name;
599 u32 type;
600 u32 mask;
601 int err;
602
603 type = 0;
604 mask = CRYPTO_ALG_ASYNC;
605
606 cryptd_check_internal(tb, &type, &mask);
607
608 name = crypto_attr_alg_name(tb[1]);
609 if (IS_ERR(name))
610 return PTR_ERR(name);
611
612 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
613 if (!inst)
614 return -ENOMEM;
615
616 ctx = skcipher_instance_ctx(inst);
617 ctx->queue = queue;
618
619 crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst));
620 err = crypto_grab_skcipher(&ctx->spawn, name, type, mask);
621 if (err)
622 goto out_free_inst;
623
624 alg = crypto_spawn_skcipher_alg(&ctx->spawn);
625 err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base);
626 if (err)
627 goto out_drop_skcipher;
628
629 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
630 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
631
632 inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg);
633 inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
634 inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg);
635 inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg);
636
637 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx);
638
639 inst->alg.init = cryptd_skcipher_init_tfm;
640 inst->alg.exit = cryptd_skcipher_exit_tfm;
641
642 inst->alg.setkey = cryptd_skcipher_setkey;
643 inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue;
644 inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue;
645
646 inst->free = cryptd_skcipher_free;
647
648 err = skcipher_register_instance(tmpl, inst);
649 if (err) {
650 out_drop_skcipher:
651 crypto_drop_skcipher(&ctx->spawn);
652 out_free_inst:
653 kfree(inst);
654 }
655 return err;
656 }
657
cryptd_hash_init_tfm(struct crypto_tfm * tfm)658 static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
659 {
660 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
661 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
662 struct crypto_shash_spawn *spawn = &ictx->spawn;
663 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
664 struct crypto_shash *hash;
665
666 hash = crypto_spawn_shash(spawn);
667 if (IS_ERR(hash))
668 return PTR_ERR(hash);
669
670 ctx->child = hash;
671 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
672 sizeof(struct cryptd_hash_request_ctx) +
673 crypto_shash_descsize(hash));
674 return 0;
675 }
676
cryptd_hash_exit_tfm(struct crypto_tfm * tfm)677 static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
678 {
679 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
680
681 crypto_free_shash(ctx->child);
682 }
683
cryptd_hash_setkey(struct crypto_ahash * parent,const u8 * key,unsigned int keylen)684 static int cryptd_hash_setkey(struct crypto_ahash *parent,
685 const u8 *key, unsigned int keylen)
686 {
687 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent);
688 struct crypto_shash *child = ctx->child;
689 int err;
690
691 crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
692 crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) &
693 CRYPTO_TFM_REQ_MASK);
694 err = crypto_shash_setkey(child, key, keylen);
695 crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) &
696 CRYPTO_TFM_RES_MASK);
697 return err;
698 }
699
cryptd_hash_enqueue(struct ahash_request * req,crypto_completion_t compl)700 static int cryptd_hash_enqueue(struct ahash_request *req,
701 crypto_completion_t compl)
702 {
703 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
704 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
705 struct cryptd_queue *queue =
706 cryptd_get_queue(crypto_ahash_tfm(tfm));
707
708 rctx->complete = req->base.complete;
709 req->base.complete = compl;
710
711 return cryptd_enqueue_request(queue, &req->base);
712 }
713
cryptd_hash_complete(struct ahash_request * req,int err)714 static void cryptd_hash_complete(struct ahash_request *req, int err)
715 {
716 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
717 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
718 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
719 int refcnt = atomic_read(&ctx->refcnt);
720
721 local_bh_disable();
722 rctx->complete(&req->base, err);
723 local_bh_enable();
724
725 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
726 crypto_free_ahash(tfm);
727 }
728
cryptd_hash_init(struct crypto_async_request * req_async,int err)729 static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
730 {
731 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
732 struct crypto_shash *child = ctx->child;
733 struct ahash_request *req = ahash_request_cast(req_async);
734 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
735 struct shash_desc *desc = &rctx->desc;
736
737 if (unlikely(err == -EINPROGRESS))
738 goto out;
739
740 desc->tfm = child;
741 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
742
743 err = crypto_shash_init(desc);
744
745 req->base.complete = rctx->complete;
746
747 out:
748 cryptd_hash_complete(req, err);
749 }
750
cryptd_hash_init_enqueue(struct ahash_request * req)751 static int cryptd_hash_init_enqueue(struct ahash_request *req)
752 {
753 return cryptd_hash_enqueue(req, cryptd_hash_init);
754 }
755
cryptd_hash_update(struct crypto_async_request * req_async,int err)756 static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
757 {
758 struct ahash_request *req = ahash_request_cast(req_async);
759 struct cryptd_hash_request_ctx *rctx;
760
761 rctx = ahash_request_ctx(req);
762
763 if (unlikely(err == -EINPROGRESS))
764 goto out;
765
766 err = shash_ahash_update(req, &rctx->desc);
767
768 req->base.complete = rctx->complete;
769
770 out:
771 cryptd_hash_complete(req, err);
772 }
773
cryptd_hash_update_enqueue(struct ahash_request * req)774 static int cryptd_hash_update_enqueue(struct ahash_request *req)
775 {
776 return cryptd_hash_enqueue(req, cryptd_hash_update);
777 }
778
cryptd_hash_final(struct crypto_async_request * req_async,int err)779 static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
780 {
781 struct ahash_request *req = ahash_request_cast(req_async);
782 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
783
784 if (unlikely(err == -EINPROGRESS))
785 goto out;
786
787 err = crypto_shash_final(&rctx->desc, req->result);
788
789 req->base.complete = rctx->complete;
790
791 out:
792 cryptd_hash_complete(req, err);
793 }
794
cryptd_hash_final_enqueue(struct ahash_request * req)795 static int cryptd_hash_final_enqueue(struct ahash_request *req)
796 {
797 return cryptd_hash_enqueue(req, cryptd_hash_final);
798 }
799
cryptd_hash_finup(struct crypto_async_request * req_async,int err)800 static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
801 {
802 struct ahash_request *req = ahash_request_cast(req_async);
803 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
804
805 if (unlikely(err == -EINPROGRESS))
806 goto out;
807
808 err = shash_ahash_finup(req, &rctx->desc);
809
810 req->base.complete = rctx->complete;
811
812 out:
813 cryptd_hash_complete(req, err);
814 }
815
cryptd_hash_finup_enqueue(struct ahash_request * req)816 static int cryptd_hash_finup_enqueue(struct ahash_request *req)
817 {
818 return cryptd_hash_enqueue(req, cryptd_hash_finup);
819 }
820
cryptd_hash_digest(struct crypto_async_request * req_async,int err)821 static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
822 {
823 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
824 struct crypto_shash *child = ctx->child;
825 struct ahash_request *req = ahash_request_cast(req_async);
826 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
827 struct shash_desc *desc = &rctx->desc;
828
829 if (unlikely(err == -EINPROGRESS))
830 goto out;
831
832 desc->tfm = child;
833 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
834
835 err = shash_ahash_digest(req, desc);
836
837 req->base.complete = rctx->complete;
838
839 out:
840 cryptd_hash_complete(req, err);
841 }
842
cryptd_hash_digest_enqueue(struct ahash_request * req)843 static int cryptd_hash_digest_enqueue(struct ahash_request *req)
844 {
845 return cryptd_hash_enqueue(req, cryptd_hash_digest);
846 }
847
cryptd_hash_export(struct ahash_request * req,void * out)848 static int cryptd_hash_export(struct ahash_request *req, void *out)
849 {
850 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
851
852 return crypto_shash_export(&rctx->desc, out);
853 }
854
cryptd_hash_import(struct ahash_request * req,const void * in)855 static int cryptd_hash_import(struct ahash_request *req, const void *in)
856 {
857 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
858 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
859 struct shash_desc *desc = cryptd_shash_desc(req);
860
861 desc->tfm = ctx->child;
862 desc->flags = req->base.flags;
863
864 return crypto_shash_import(desc, in);
865 }
866
cryptd_create_hash(struct crypto_template * tmpl,struct rtattr ** tb,struct cryptd_queue * queue)867 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
868 struct cryptd_queue *queue)
869 {
870 struct hashd_instance_ctx *ctx;
871 struct ahash_instance *inst;
872 struct shash_alg *salg;
873 struct crypto_alg *alg;
874 u32 type = 0;
875 u32 mask = 0;
876 int err;
877
878 cryptd_check_internal(tb, &type, &mask);
879
880 salg = shash_attr_alg(tb[1], type, mask);
881 if (IS_ERR(salg))
882 return PTR_ERR(salg);
883
884 alg = &salg->base;
885 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
886 sizeof(*ctx));
887 err = PTR_ERR(inst);
888 if (IS_ERR(inst))
889 goto out_put_alg;
890
891 ctx = ahash_instance_ctx(inst);
892 ctx->queue = queue;
893
894 err = crypto_init_shash_spawn(&ctx->spawn, salg,
895 ahash_crypto_instance(inst));
896 if (err)
897 goto out_free_inst;
898
899 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
900 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
901 CRYPTO_ALG_OPTIONAL_KEY));
902
903 inst->alg.halg.digestsize = salg->digestsize;
904 inst->alg.halg.statesize = salg->statesize;
905 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
906
907 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
908 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
909
910 inst->alg.init = cryptd_hash_init_enqueue;
911 inst->alg.update = cryptd_hash_update_enqueue;
912 inst->alg.final = cryptd_hash_final_enqueue;
913 inst->alg.finup = cryptd_hash_finup_enqueue;
914 inst->alg.export = cryptd_hash_export;
915 inst->alg.import = cryptd_hash_import;
916 if (crypto_shash_alg_has_setkey(salg))
917 inst->alg.setkey = cryptd_hash_setkey;
918 inst->alg.digest = cryptd_hash_digest_enqueue;
919
920 err = ahash_register_instance(tmpl, inst);
921 if (err) {
922 crypto_drop_shash(&ctx->spawn);
923 out_free_inst:
924 kfree(inst);
925 }
926
927 out_put_alg:
928 crypto_mod_put(alg);
929 return err;
930 }
931
cryptd_aead_setkey(struct crypto_aead * parent,const u8 * key,unsigned int keylen)932 static int cryptd_aead_setkey(struct crypto_aead *parent,
933 const u8 *key, unsigned int keylen)
934 {
935 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
936 struct crypto_aead *child = ctx->child;
937
938 return crypto_aead_setkey(child, key, keylen);
939 }
940
cryptd_aead_setauthsize(struct crypto_aead * parent,unsigned int authsize)941 static int cryptd_aead_setauthsize(struct crypto_aead *parent,
942 unsigned int authsize)
943 {
944 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent);
945 struct crypto_aead *child = ctx->child;
946
947 return crypto_aead_setauthsize(child, authsize);
948 }
949
cryptd_aead_crypt(struct aead_request * req,struct crypto_aead * child,int err,int (* crypt)(struct aead_request * req))950 static void cryptd_aead_crypt(struct aead_request *req,
951 struct crypto_aead *child,
952 int err,
953 int (*crypt)(struct aead_request *req))
954 {
955 struct cryptd_aead_request_ctx *rctx;
956 struct cryptd_aead_ctx *ctx;
957 crypto_completion_t compl;
958 struct crypto_aead *tfm;
959 int refcnt;
960
961 rctx = aead_request_ctx(req);
962 compl = rctx->complete;
963
964 tfm = crypto_aead_reqtfm(req);
965
966 if (unlikely(err == -EINPROGRESS))
967 goto out;
968 aead_request_set_tfm(req, child);
969 err = crypt( req );
970
971 out:
972 ctx = crypto_aead_ctx(tfm);
973 refcnt = atomic_read(&ctx->refcnt);
974
975 local_bh_disable();
976 compl(&req->base, err);
977 local_bh_enable();
978
979 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
980 crypto_free_aead(tfm);
981 }
982
cryptd_aead_encrypt(struct crypto_async_request * areq,int err)983 static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err)
984 {
985 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
986 struct crypto_aead *child = ctx->child;
987 struct aead_request *req;
988
989 req = container_of(areq, struct aead_request, base);
990 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
991 }
992
cryptd_aead_decrypt(struct crypto_async_request * areq,int err)993 static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err)
994 {
995 struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm);
996 struct crypto_aead *child = ctx->child;
997 struct aead_request *req;
998
999 req = container_of(areq, struct aead_request, base);
1000 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
1001 }
1002
cryptd_aead_enqueue(struct aead_request * req,crypto_completion_t compl)1003 static int cryptd_aead_enqueue(struct aead_request *req,
1004 crypto_completion_t compl)
1005 {
1006 struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req);
1007 struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1008 struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm));
1009
1010 rctx->complete = req->base.complete;
1011 req->base.complete = compl;
1012 return cryptd_enqueue_request(queue, &req->base);
1013 }
1014
cryptd_aead_encrypt_enqueue(struct aead_request * req)1015 static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
1016 {
1017 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
1018 }
1019
cryptd_aead_decrypt_enqueue(struct aead_request * req)1020 static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
1021 {
1022 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
1023 }
1024
cryptd_aead_init_tfm(struct crypto_aead * tfm)1025 static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
1026 {
1027 struct aead_instance *inst = aead_alg_instance(tfm);
1028 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
1029 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
1030 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
1031 struct crypto_aead *cipher;
1032
1033 cipher = crypto_spawn_aead(spawn);
1034 if (IS_ERR(cipher))
1035 return PTR_ERR(cipher);
1036
1037 ctx->child = cipher;
1038 crypto_aead_set_reqsize(
1039 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
1040 crypto_aead_reqsize(cipher)));
1041 return 0;
1042 }
1043
cryptd_aead_exit_tfm(struct crypto_aead * tfm)1044 static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
1045 {
1046 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
1047 crypto_free_aead(ctx->child);
1048 }
1049
cryptd_create_aead(struct crypto_template * tmpl,struct rtattr ** tb,struct cryptd_queue * queue)1050 static int cryptd_create_aead(struct crypto_template *tmpl,
1051 struct rtattr **tb,
1052 struct cryptd_queue *queue)
1053 {
1054 struct aead_instance_ctx *ctx;
1055 struct aead_instance *inst;
1056 struct aead_alg *alg;
1057 const char *name;
1058 u32 type = 0;
1059 u32 mask = CRYPTO_ALG_ASYNC;
1060 int err;
1061
1062 cryptd_check_internal(tb, &type, &mask);
1063
1064 name = crypto_attr_alg_name(tb[1]);
1065 if (IS_ERR(name))
1066 return PTR_ERR(name);
1067
1068 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
1069 if (!inst)
1070 return -ENOMEM;
1071
1072 ctx = aead_instance_ctx(inst);
1073 ctx->queue = queue;
1074
1075 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
1076 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
1077 if (err)
1078 goto out_free_inst;
1079
1080 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
1081 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
1082 if (err)
1083 goto out_drop_aead;
1084
1085 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
1086 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
1087 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
1088
1089 inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
1090 inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
1091
1092 inst->alg.init = cryptd_aead_init_tfm;
1093 inst->alg.exit = cryptd_aead_exit_tfm;
1094 inst->alg.setkey = cryptd_aead_setkey;
1095 inst->alg.setauthsize = cryptd_aead_setauthsize;
1096 inst->alg.encrypt = cryptd_aead_encrypt_enqueue;
1097 inst->alg.decrypt = cryptd_aead_decrypt_enqueue;
1098
1099 err = aead_register_instance(tmpl, inst);
1100 if (err) {
1101 out_drop_aead:
1102 crypto_drop_aead(&ctx->aead_spawn);
1103 out_free_inst:
1104 kfree(inst);
1105 }
1106 return err;
1107 }
1108
1109 static struct cryptd_queue queue;
1110
cryptd_create(struct crypto_template * tmpl,struct rtattr ** tb)1111 static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
1112 {
1113 struct crypto_attr_type *algt;
1114
1115 algt = crypto_get_attr_type(tb);
1116 if (IS_ERR(algt))
1117 return PTR_ERR(algt);
1118
1119 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
1120 case CRYPTO_ALG_TYPE_BLKCIPHER:
1121 if ((algt->type & CRYPTO_ALG_TYPE_MASK) ==
1122 CRYPTO_ALG_TYPE_BLKCIPHER)
1123 return cryptd_create_blkcipher(tmpl, tb, &queue);
1124
1125 return cryptd_create_skcipher(tmpl, tb, &queue);
1126 case CRYPTO_ALG_TYPE_DIGEST:
1127 return cryptd_create_hash(tmpl, tb, &queue);
1128 case CRYPTO_ALG_TYPE_AEAD:
1129 return cryptd_create_aead(tmpl, tb, &queue);
1130 }
1131
1132 return -EINVAL;
1133 }
1134
cryptd_free(struct crypto_instance * inst)1135 static void cryptd_free(struct crypto_instance *inst)
1136 {
1137 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
1138 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
1139 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
1140
1141 switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) {
1142 case CRYPTO_ALG_TYPE_AHASH:
1143 crypto_drop_shash(&hctx->spawn);
1144 kfree(ahash_instance(inst));
1145 return;
1146 case CRYPTO_ALG_TYPE_AEAD:
1147 crypto_drop_aead(&aead_ctx->aead_spawn);
1148 kfree(aead_instance(inst));
1149 return;
1150 default:
1151 crypto_drop_spawn(&ctx->spawn);
1152 kfree(inst);
1153 }
1154 }
1155
1156 static struct crypto_template cryptd_tmpl = {
1157 .name = "cryptd",
1158 .create = cryptd_create,
1159 .free = cryptd_free,
1160 .module = THIS_MODULE,
1161 };
1162
cryptd_alloc_ablkcipher(const char * alg_name,u32 type,u32 mask)1163 struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
1164 u32 type, u32 mask)
1165 {
1166 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1167 struct cryptd_blkcipher_ctx *ctx;
1168 struct crypto_tfm *tfm;
1169
1170 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1171 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1172 return ERR_PTR(-EINVAL);
1173 type = crypto_skcipher_type(type);
1174 mask &= ~CRYPTO_ALG_TYPE_MASK;
1175 mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK);
1176 tfm = crypto_alloc_base(cryptd_alg_name, type, mask);
1177 if (IS_ERR(tfm))
1178 return ERR_CAST(tfm);
1179 if (tfm->__crt_alg->cra_module != THIS_MODULE) {
1180 crypto_free_tfm(tfm);
1181 return ERR_PTR(-EINVAL);
1182 }
1183
1184 ctx = crypto_tfm_ctx(tfm);
1185 atomic_set(&ctx->refcnt, 1);
1186
1187 return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
1188 }
1189 EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
1190
cryptd_ablkcipher_child(struct cryptd_ablkcipher * tfm)1191 struct crypto_blkcipher *cryptd_ablkcipher_child(struct cryptd_ablkcipher *tfm)
1192 {
1193 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1194 return ctx->child;
1195 }
1196 EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
1197
cryptd_ablkcipher_queued(struct cryptd_ablkcipher * tfm)1198 bool cryptd_ablkcipher_queued(struct cryptd_ablkcipher *tfm)
1199 {
1200 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1201
1202 return atomic_read(&ctx->refcnt) - 1;
1203 }
1204 EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued);
1205
cryptd_free_ablkcipher(struct cryptd_ablkcipher * tfm)1206 void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
1207 {
1208 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base);
1209
1210 if (atomic_dec_and_test(&ctx->refcnt))
1211 crypto_free_ablkcipher(&tfm->base);
1212 }
1213 EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
1214
cryptd_alloc_skcipher(const char * alg_name,u32 type,u32 mask)1215 struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name,
1216 u32 type, u32 mask)
1217 {
1218 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1219 struct cryptd_skcipher_ctx *ctx;
1220 struct crypto_skcipher *tfm;
1221
1222 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1223 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1224 return ERR_PTR(-EINVAL);
1225
1226 tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask);
1227 if (IS_ERR(tfm))
1228 return ERR_CAST(tfm);
1229
1230 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1231 crypto_free_skcipher(tfm);
1232 return ERR_PTR(-EINVAL);
1233 }
1234
1235 ctx = crypto_skcipher_ctx(tfm);
1236 atomic_set(&ctx->refcnt, 1);
1237
1238 return container_of(tfm, struct cryptd_skcipher, base);
1239 }
1240 EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
1241
cryptd_skcipher_child(struct cryptd_skcipher * tfm)1242 struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm)
1243 {
1244 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1245
1246 return ctx->child;
1247 }
1248 EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
1249
cryptd_skcipher_queued(struct cryptd_skcipher * tfm)1250 bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm)
1251 {
1252 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1253
1254 return atomic_read(&ctx->refcnt) - 1;
1255 }
1256 EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1257
cryptd_free_skcipher(struct cryptd_skcipher * tfm)1258 void cryptd_free_skcipher(struct cryptd_skcipher *tfm)
1259 {
1260 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base);
1261
1262 if (atomic_dec_and_test(&ctx->refcnt))
1263 crypto_free_skcipher(&tfm->base);
1264 }
1265 EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1266
cryptd_alloc_ahash(const char * alg_name,u32 type,u32 mask)1267 struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1268 u32 type, u32 mask)
1269 {
1270 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1271 struct cryptd_hash_ctx *ctx;
1272 struct crypto_ahash *tfm;
1273
1274 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1275 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1276 return ERR_PTR(-EINVAL);
1277 tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask);
1278 if (IS_ERR(tfm))
1279 return ERR_CAST(tfm);
1280 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1281 crypto_free_ahash(tfm);
1282 return ERR_PTR(-EINVAL);
1283 }
1284
1285 ctx = crypto_ahash_ctx(tfm);
1286 atomic_set(&ctx->refcnt, 1);
1287
1288 return __cryptd_ahash_cast(tfm);
1289 }
1290 EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1291
cryptd_ahash_child(struct cryptd_ahash * tfm)1292 struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm)
1293 {
1294 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1295
1296 return ctx->child;
1297 }
1298 EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1299
cryptd_shash_desc(struct ahash_request * req)1300 struct shash_desc *cryptd_shash_desc(struct ahash_request *req)
1301 {
1302 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
1303 return &rctx->desc;
1304 }
1305 EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1306
cryptd_ahash_queued(struct cryptd_ahash * tfm)1307 bool cryptd_ahash_queued(struct cryptd_ahash *tfm)
1308 {
1309 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1310
1311 return atomic_read(&ctx->refcnt) - 1;
1312 }
1313 EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1314
cryptd_free_ahash(struct cryptd_ahash * tfm)1315 void cryptd_free_ahash(struct cryptd_ahash *tfm)
1316 {
1317 struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base);
1318
1319 if (atomic_dec_and_test(&ctx->refcnt))
1320 crypto_free_ahash(&tfm->base);
1321 }
1322 EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1323
cryptd_alloc_aead(const char * alg_name,u32 type,u32 mask)1324 struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1325 u32 type, u32 mask)
1326 {
1327 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
1328 struct cryptd_aead_ctx *ctx;
1329 struct crypto_aead *tfm;
1330
1331 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1332 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1333 return ERR_PTR(-EINVAL);
1334 tfm = crypto_alloc_aead(cryptd_alg_name, type, mask);
1335 if (IS_ERR(tfm))
1336 return ERR_CAST(tfm);
1337 if (tfm->base.__crt_alg->cra_module != THIS_MODULE) {
1338 crypto_free_aead(tfm);
1339 return ERR_PTR(-EINVAL);
1340 }
1341
1342 ctx = crypto_aead_ctx(tfm);
1343 atomic_set(&ctx->refcnt, 1);
1344
1345 return __cryptd_aead_cast(tfm);
1346 }
1347 EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1348
cryptd_aead_child(struct cryptd_aead * tfm)1349 struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm)
1350 {
1351 struct cryptd_aead_ctx *ctx;
1352 ctx = crypto_aead_ctx(&tfm->base);
1353 return ctx->child;
1354 }
1355 EXPORT_SYMBOL_GPL(cryptd_aead_child);
1356
cryptd_aead_queued(struct cryptd_aead * tfm)1357 bool cryptd_aead_queued(struct cryptd_aead *tfm)
1358 {
1359 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1360
1361 return atomic_read(&ctx->refcnt) - 1;
1362 }
1363 EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1364
cryptd_free_aead(struct cryptd_aead * tfm)1365 void cryptd_free_aead(struct cryptd_aead *tfm)
1366 {
1367 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base);
1368
1369 if (atomic_dec_and_test(&ctx->refcnt))
1370 crypto_free_aead(&tfm->base);
1371 }
1372 EXPORT_SYMBOL_GPL(cryptd_free_aead);
1373
cryptd_init(void)1374 static int __init cryptd_init(void)
1375 {
1376 int err;
1377
1378 err = cryptd_init_queue(&queue, CRYPTD_MAX_CPU_QLEN);
1379 if (err)
1380 return err;
1381
1382 err = crypto_register_template(&cryptd_tmpl);
1383 if (err)
1384 cryptd_fini_queue(&queue);
1385
1386 return err;
1387 }
1388
cryptd_exit(void)1389 static void __exit cryptd_exit(void)
1390 {
1391 cryptd_fini_queue(&queue);
1392 crypto_unregister_template(&cryptd_tmpl);
1393 }
1394
1395 subsys_initcall(cryptd_init);
1396 module_exit(cryptd_exit);
1397
1398 MODULE_LICENSE("GPL");
1399 MODULE_DESCRIPTION("Software async crypto daemon");
1400 MODULE_ALIAS_CRYPTO("cryptd");
1401