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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
124b53d0 HX |
2 | /* |
3 | * Software async crypto daemon. | |
4 | * | |
5 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> | |
6 | * | |
298c926c AH |
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. | |
124b53d0 HX |
13 | */ |
14 | ||
18e33e6d | 15 | #include <crypto/internal/hash.h> |
298c926c | 16 | #include <crypto/internal/aead.h> |
4e0958d1 | 17 | #include <crypto/internal/skcipher.h> |
1cac2cbc | 18 | #include <crypto/cryptd.h> |
254eff77 | 19 | #include <crypto/crypto_wq.h> |
81760ea6 | 20 | #include <linux/atomic.h> |
124b53d0 HX |
21 | #include <linux/err.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/kernel.h> | |
124b53d0 HX |
24 | #include <linux/list.h> |
25 | #include <linux/module.h> | |
124b53d0 HX |
26 | #include <linux/scatterlist.h> |
27 | #include <linux/sched.h> | |
28 | #include <linux/slab.h> | |
124b53d0 | 29 | |
eaf356e4 | 30 | static unsigned int cryptd_max_cpu_qlen = 1000; |
c3a53605 JM |
31 | module_param(cryptd_max_cpu_qlen, uint, 0); |
32 | MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth"); | |
124b53d0 | 33 | |
254eff77 | 34 | struct cryptd_cpu_queue { |
124b53d0 | 35 | struct crypto_queue queue; |
254eff77 HY |
36 | struct work_struct work; |
37 | }; | |
38 | ||
39 | struct cryptd_queue { | |
a29d8b8e | 40 | struct cryptd_cpu_queue __percpu *cpu_queue; |
124b53d0 HX |
41 | }; |
42 | ||
43 | struct cryptd_instance_ctx { | |
44 | struct crypto_spawn spawn; | |
254eff77 | 45 | struct cryptd_queue *queue; |
124b53d0 HX |
46 | }; |
47 | ||
4e0958d1 HX |
48 | struct skcipherd_instance_ctx { |
49 | struct crypto_skcipher_spawn spawn; | |
50 | struct cryptd_queue *queue; | |
51 | }; | |
52 | ||
46309d89 HX |
53 | struct hashd_instance_ctx { |
54 | struct crypto_shash_spawn spawn; | |
55 | struct cryptd_queue *queue; | |
56 | }; | |
57 | ||
298c926c AH |
58 | struct aead_instance_ctx { |
59 | struct crypto_aead_spawn aead_spawn; | |
60 | struct cryptd_queue *queue; | |
61 | }; | |
62 | ||
4e0958d1 HX |
63 | struct cryptd_skcipher_ctx { |
64 | atomic_t refcnt; | |
36b3875a | 65 | struct crypto_sync_skcipher *child; |
4e0958d1 HX |
66 | }; |
67 | ||
68 | struct cryptd_skcipher_request_ctx { | |
69 | crypto_completion_t complete; | |
70 | }; | |
71 | ||
b8a28251 | 72 | struct cryptd_hash_ctx { |
81760ea6 | 73 | atomic_t refcnt; |
46309d89 | 74 | struct crypto_shash *child; |
b8a28251 LH |
75 | }; |
76 | ||
77 | struct cryptd_hash_request_ctx { | |
78 | crypto_completion_t complete; | |
46309d89 | 79 | struct shash_desc desc; |
b8a28251 | 80 | }; |
124b53d0 | 81 | |
298c926c | 82 | struct cryptd_aead_ctx { |
81760ea6 | 83 | atomic_t refcnt; |
298c926c AH |
84 | struct crypto_aead *child; |
85 | }; | |
86 | ||
87 | struct cryptd_aead_request_ctx { | |
88 | crypto_completion_t complete; | |
89 | }; | |
90 | ||
254eff77 HY |
91 | static void cryptd_queue_worker(struct work_struct *work); |
92 | ||
93 | static int cryptd_init_queue(struct cryptd_queue *queue, | |
94 | unsigned int max_cpu_qlen) | |
95 | { | |
96 | int cpu; | |
97 | struct cryptd_cpu_queue *cpu_queue; | |
98 | ||
99 | queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); | |
100 | if (!queue->cpu_queue) | |
101 | return -ENOMEM; | |
102 | for_each_possible_cpu(cpu) { | |
103 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); | |
104 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); | |
105 | INIT_WORK(&cpu_queue->work, cryptd_queue_worker); | |
106 | } | |
c3a53605 | 107 | pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen); |
254eff77 HY |
108 | return 0; |
109 | } | |
110 | ||
111 | static void cryptd_fini_queue(struct cryptd_queue *queue) | |
112 | { | |
113 | int cpu; | |
114 | struct cryptd_cpu_queue *cpu_queue; | |
115 | ||
116 | for_each_possible_cpu(cpu) { | |
117 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); | |
118 | BUG_ON(cpu_queue->queue.qlen); | |
119 | } | |
120 | free_percpu(queue->cpu_queue); | |
121 | } | |
122 | ||
123 | static int cryptd_enqueue_request(struct cryptd_queue *queue, | |
124 | struct crypto_async_request *request) | |
125 | { | |
126 | int cpu, err; | |
127 | struct cryptd_cpu_queue *cpu_queue; | |
81760ea6 | 128 | atomic_t *refcnt; |
254eff77 HY |
129 | |
130 | cpu = get_cpu(); | |
0b44f486 | 131 | cpu_queue = this_cpu_ptr(queue->cpu_queue); |
254eff77 | 132 | err = crypto_enqueue_request(&cpu_queue->queue, request); |
81760ea6 HX |
133 | |
134 | refcnt = crypto_tfm_ctx(request->tfm); | |
81760ea6 | 135 | |
6b80ea38 | 136 | if (err == -ENOSPC) |
81760ea6 HX |
137 | goto out_put_cpu; |
138 | ||
254eff77 | 139 | queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |
81760ea6 HX |
140 | |
141 | if (!atomic_read(refcnt)) | |
142 | goto out_put_cpu; | |
143 | ||
81760ea6 HX |
144 | atomic_inc(refcnt); |
145 | ||
146 | out_put_cpu: | |
254eff77 HY |
147 | put_cpu(); |
148 | ||
149 | return err; | |
150 | } | |
151 | ||
152 | /* Called in workqueue context, do one real cryption work (via | |
153 | * req->complete) and reschedule itself if there are more work to | |
154 | * do. */ | |
155 | static void cryptd_queue_worker(struct work_struct *work) | |
156 | { | |
157 | struct cryptd_cpu_queue *cpu_queue; | |
158 | struct crypto_async_request *req, *backlog; | |
159 | ||
160 | cpu_queue = container_of(work, struct cryptd_cpu_queue, work); | |
9efade1b JK |
161 | /* |
162 | * Only handle one request at a time to avoid hogging crypto workqueue. | |
163 | * preempt_disable/enable is used to prevent being preempted by | |
164 | * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent | |
165 | * cryptd_enqueue_request() being accessed from software interrupts. | |
166 | */ | |
167 | local_bh_disable(); | |
254eff77 HY |
168 | preempt_disable(); |
169 | backlog = crypto_get_backlog(&cpu_queue->queue); | |
170 | req = crypto_dequeue_request(&cpu_queue->queue); | |
171 | preempt_enable(); | |
9efade1b | 172 | local_bh_enable(); |
254eff77 HY |
173 | |
174 | if (!req) | |
175 | return; | |
176 | ||
177 | if (backlog) | |
178 | backlog->complete(backlog, -EINPROGRESS); | |
179 | req->complete(req, 0); | |
180 | ||
181 | if (cpu_queue->queue.qlen) | |
182 | queue_work(kcrypto_wq, &cpu_queue->work); | |
183 | } | |
184 | ||
185 | static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) | |
124b53d0 HX |
186 | { |
187 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); | |
188 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); | |
254eff77 | 189 | return ictx->queue; |
124b53d0 HX |
190 | } |
191 | ||
466a7b9e SM |
192 | static inline void cryptd_check_internal(struct rtattr **tb, u32 *type, |
193 | u32 *mask) | |
194 | { | |
195 | struct crypto_attr_type *algt; | |
196 | ||
197 | algt = crypto_get_attr_type(tb); | |
198 | if (IS_ERR(algt)) | |
199 | return; | |
f6da3205 | 200 | |
5e4b8c1f HX |
201 | *type |= algt->type & CRYPTO_ALG_INTERNAL; |
202 | *mask |= algt->mask & CRYPTO_ALG_INTERNAL; | |
466a7b9e SM |
203 | } |
204 | ||
9b8c456e HX |
205 | static int cryptd_init_instance(struct crypto_instance *inst, |
206 | struct crypto_alg *alg) | |
207 | { | |
208 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, | |
209 | "cryptd(%s)", | |
210 | alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) | |
211 | return -ENAMETOOLONG; | |
212 | ||
213 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); | |
214 | ||
215 | inst->alg.cra_priority = alg->cra_priority + 50; | |
216 | inst->alg.cra_blocksize = alg->cra_blocksize; | |
217 | inst->alg.cra_alignmask = alg->cra_alignmask; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
0b535adf HX |
222 | static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head, |
223 | unsigned int tail) | |
124b53d0 | 224 | { |
0b535adf | 225 | char *p; |
124b53d0 | 226 | struct crypto_instance *inst; |
124b53d0 HX |
227 | int err; |
228 | ||
0b535adf HX |
229 | p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL); |
230 | if (!p) | |
231 | return ERR_PTR(-ENOMEM); | |
232 | ||
233 | inst = (void *)(p + head); | |
124b53d0 | 234 | |
9b8c456e HX |
235 | err = cryptd_init_instance(inst, alg); |
236 | if (err) | |
124b53d0 HX |
237 | goto out_free_inst; |
238 | ||
124b53d0 | 239 | out: |
0b535adf | 240 | return p; |
124b53d0 HX |
241 | |
242 | out_free_inst: | |
0b535adf HX |
243 | kfree(p); |
244 | p = ERR_PTR(err); | |
124b53d0 HX |
245 | goto out; |
246 | } | |
247 | ||
4e0958d1 HX |
248 | static int cryptd_skcipher_setkey(struct crypto_skcipher *parent, |
249 | const u8 *key, unsigned int keylen) | |
250 | { | |
251 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent); | |
36b3875a | 252 | struct crypto_sync_skcipher *child = ctx->child; |
4e0958d1 HX |
253 | int err; |
254 | ||
36b3875a KC |
255 | crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
256 | crypto_sync_skcipher_set_flags(child, | |
257 | crypto_skcipher_get_flags(parent) & | |
4e0958d1 | 258 | CRYPTO_TFM_REQ_MASK); |
36b3875a KC |
259 | err = crypto_sync_skcipher_setkey(child, key, keylen); |
260 | crypto_skcipher_set_flags(parent, | |
261 | crypto_sync_skcipher_get_flags(child) & | |
4e0958d1 HX |
262 | CRYPTO_TFM_RES_MASK); |
263 | return err; | |
264 | } | |
265 | ||
266 | static void cryptd_skcipher_complete(struct skcipher_request *req, int err) | |
267 | { | |
268 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
269 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
270 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
271 | int refcnt = atomic_read(&ctx->refcnt); | |
272 | ||
273 | local_bh_disable(); | |
274 | rctx->complete(&req->base, err); | |
275 | local_bh_enable(); | |
276 | ||
277 | if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) | |
278 | crypto_free_skcipher(tfm); | |
279 | } | |
280 | ||
281 | static void cryptd_skcipher_encrypt(struct crypto_async_request *base, | |
282 | int err) | |
283 | { | |
284 | struct skcipher_request *req = skcipher_request_cast(base); | |
285 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
286 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
287 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
36b3875a KC |
288 | struct crypto_sync_skcipher *child = ctx->child; |
289 | SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); | |
4e0958d1 HX |
290 | |
291 | if (unlikely(err == -EINPROGRESS)) | |
292 | goto out; | |
293 | ||
36b3875a | 294 | skcipher_request_set_sync_tfm(subreq, child); |
4e0958d1 HX |
295 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, |
296 | NULL, NULL); | |
297 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, | |
298 | req->iv); | |
299 | ||
300 | err = crypto_skcipher_encrypt(subreq); | |
301 | skcipher_request_zero(subreq); | |
302 | ||
303 | req->base.complete = rctx->complete; | |
304 | ||
305 | out: | |
306 | cryptd_skcipher_complete(req, err); | |
307 | } | |
308 | ||
309 | static void cryptd_skcipher_decrypt(struct crypto_async_request *base, | |
310 | int err) | |
311 | { | |
312 | struct skcipher_request *req = skcipher_request_cast(base); | |
313 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
314 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
315 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
36b3875a KC |
316 | struct crypto_sync_skcipher *child = ctx->child; |
317 | SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); | |
4e0958d1 HX |
318 | |
319 | if (unlikely(err == -EINPROGRESS)) | |
320 | goto out; | |
321 | ||
36b3875a | 322 | skcipher_request_set_sync_tfm(subreq, child); |
4e0958d1 HX |
323 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, |
324 | NULL, NULL); | |
325 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, | |
326 | req->iv); | |
327 | ||
328 | err = crypto_skcipher_decrypt(subreq); | |
329 | skcipher_request_zero(subreq); | |
330 | ||
331 | req->base.complete = rctx->complete; | |
332 | ||
333 | out: | |
334 | cryptd_skcipher_complete(req, err); | |
335 | } | |
336 | ||
337 | static int cryptd_skcipher_enqueue(struct skcipher_request *req, | |
338 | crypto_completion_t compl) | |
339 | { | |
340 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
341 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
342 | struct cryptd_queue *queue; | |
343 | ||
344 | queue = cryptd_get_queue(crypto_skcipher_tfm(tfm)); | |
345 | rctx->complete = req->base.complete; | |
346 | req->base.complete = compl; | |
347 | ||
348 | return cryptd_enqueue_request(queue, &req->base); | |
349 | } | |
350 | ||
351 | static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req) | |
352 | { | |
353 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt); | |
354 | } | |
355 | ||
356 | static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req) | |
357 | { | |
358 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt); | |
359 | } | |
360 | ||
361 | static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm) | |
362 | { | |
363 | struct skcipher_instance *inst = skcipher_alg_instance(tfm); | |
364 | struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst); | |
365 | struct crypto_skcipher_spawn *spawn = &ictx->spawn; | |
366 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
367 | struct crypto_skcipher *cipher; | |
368 | ||
369 | cipher = crypto_spawn_skcipher(spawn); | |
370 | if (IS_ERR(cipher)) | |
371 | return PTR_ERR(cipher); | |
372 | ||
36b3875a | 373 | ctx->child = (struct crypto_sync_skcipher *)cipher; |
4e0958d1 HX |
374 | crypto_skcipher_set_reqsize( |
375 | tfm, sizeof(struct cryptd_skcipher_request_ctx)); | |
376 | return 0; | |
377 | } | |
378 | ||
379 | static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm) | |
380 | { | |
381 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
382 | ||
36b3875a | 383 | crypto_free_sync_skcipher(ctx->child); |
4e0958d1 HX |
384 | } |
385 | ||
386 | static void cryptd_skcipher_free(struct skcipher_instance *inst) | |
387 | { | |
388 | struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst); | |
389 | ||
390 | crypto_drop_skcipher(&ctx->spawn); | |
391 | } | |
392 | ||
393 | static int cryptd_create_skcipher(struct crypto_template *tmpl, | |
394 | struct rtattr **tb, | |
395 | struct cryptd_queue *queue) | |
396 | { | |
397 | struct skcipherd_instance_ctx *ctx; | |
398 | struct skcipher_instance *inst; | |
399 | struct skcipher_alg *alg; | |
400 | const char *name; | |
401 | u32 type; | |
402 | u32 mask; | |
403 | int err; | |
404 | ||
405 | type = 0; | |
406 | mask = CRYPTO_ALG_ASYNC; | |
407 | ||
408 | cryptd_check_internal(tb, &type, &mask); | |
409 | ||
410 | name = crypto_attr_alg_name(tb[1]); | |
411 | if (IS_ERR(name)) | |
412 | return PTR_ERR(name); | |
413 | ||
414 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); | |
415 | if (!inst) | |
416 | return -ENOMEM; | |
417 | ||
418 | ctx = skcipher_instance_ctx(inst); | |
419 | ctx->queue = queue; | |
420 | ||
421 | crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst)); | |
422 | err = crypto_grab_skcipher(&ctx->spawn, name, type, mask); | |
423 | if (err) | |
424 | goto out_free_inst; | |
425 | ||
426 | alg = crypto_spawn_skcipher_alg(&ctx->spawn); | |
427 | err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base); | |
428 | if (err) | |
429 | goto out_drop_skcipher; | |
430 | ||
431 | inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC | | |
432 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); | |
433 | ||
434 | inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg); | |
435 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); | |
436 | inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); | |
437 | inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); | |
438 | ||
439 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx); | |
440 | ||
441 | inst->alg.init = cryptd_skcipher_init_tfm; | |
442 | inst->alg.exit = cryptd_skcipher_exit_tfm; | |
443 | ||
444 | inst->alg.setkey = cryptd_skcipher_setkey; | |
445 | inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue; | |
446 | inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue; | |
447 | ||
448 | inst->free = cryptd_skcipher_free; | |
449 | ||
450 | err = skcipher_register_instance(tmpl, inst); | |
451 | if (err) { | |
452 | out_drop_skcipher: | |
453 | crypto_drop_skcipher(&ctx->spawn); | |
454 | out_free_inst: | |
455 | kfree(inst); | |
456 | } | |
457 | return err; | |
458 | } | |
459 | ||
b8a28251 LH |
460 | static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) |
461 | { | |
462 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); | |
46309d89 HX |
463 | struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); |
464 | struct crypto_shash_spawn *spawn = &ictx->spawn; | |
b8a28251 | 465 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
46309d89 | 466 | struct crypto_shash *hash; |
b8a28251 | 467 | |
46309d89 HX |
468 | hash = crypto_spawn_shash(spawn); |
469 | if (IS_ERR(hash)) | |
470 | return PTR_ERR(hash); | |
b8a28251 | 471 | |
46309d89 | 472 | ctx->child = hash; |
0d6669e2 HX |
473 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
474 | sizeof(struct cryptd_hash_request_ctx) + | |
475 | crypto_shash_descsize(hash)); | |
b8a28251 LH |
476 | return 0; |
477 | } | |
478 | ||
479 | static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) | |
480 | { | |
481 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); | |
b8a28251 | 482 | |
46309d89 | 483 | crypto_free_shash(ctx->child); |
b8a28251 LH |
484 | } |
485 | ||
486 | static int cryptd_hash_setkey(struct crypto_ahash *parent, | |
487 | const u8 *key, unsigned int keylen) | |
488 | { | |
489 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); | |
46309d89 | 490 | struct crypto_shash *child = ctx->child; |
b8a28251 LH |
491 | int err; |
492 | ||
46309d89 HX |
493 | crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
494 | crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & | |
495 | CRYPTO_TFM_REQ_MASK); | |
496 | err = crypto_shash_setkey(child, key, keylen); | |
497 | crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) & | |
498 | CRYPTO_TFM_RES_MASK); | |
b8a28251 LH |
499 | return err; |
500 | } | |
501 | ||
502 | static int cryptd_hash_enqueue(struct ahash_request *req, | |
3e3dc25f | 503 | crypto_completion_t compl) |
b8a28251 LH |
504 | { |
505 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
506 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
254eff77 HY |
507 | struct cryptd_queue *queue = |
508 | cryptd_get_queue(crypto_ahash_tfm(tfm)); | |
b8a28251 LH |
509 | |
510 | rctx->complete = req->base.complete; | |
3e3dc25f | 511 | req->base.complete = compl; |
b8a28251 | 512 | |
254eff77 | 513 | return cryptd_enqueue_request(queue, &req->base); |
b8a28251 LH |
514 | } |
515 | ||
81760ea6 HX |
516 | static void cryptd_hash_complete(struct ahash_request *req, int err) |
517 | { | |
518 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
519 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); | |
520 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
521 | int refcnt = atomic_read(&ctx->refcnt); | |
522 | ||
523 | local_bh_disable(); | |
524 | rctx->complete(&req->base, err); | |
525 | local_bh_enable(); | |
526 | ||
527 | if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) | |
528 | crypto_free_ahash(tfm); | |
529 | } | |
530 | ||
b8a28251 LH |
531 | static void cryptd_hash_init(struct crypto_async_request *req_async, int err) |
532 | { | |
46309d89 HX |
533 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
534 | struct crypto_shash *child = ctx->child; | |
535 | struct ahash_request *req = ahash_request_cast(req_async); | |
536 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
537 | struct shash_desc *desc = &rctx->desc; | |
b8a28251 LH |
538 | |
539 | if (unlikely(err == -EINPROGRESS)) | |
540 | goto out; | |
541 | ||
46309d89 | 542 | desc->tfm = child; |
b8a28251 | 543 | |
46309d89 | 544 | err = crypto_shash_init(desc); |
b8a28251 LH |
545 | |
546 | req->base.complete = rctx->complete; | |
547 | ||
548 | out: | |
81760ea6 | 549 | cryptd_hash_complete(req, err); |
b8a28251 LH |
550 | } |
551 | ||
552 | static int cryptd_hash_init_enqueue(struct ahash_request *req) | |
553 | { | |
554 | return cryptd_hash_enqueue(req, cryptd_hash_init); | |
555 | } | |
556 | ||
557 | static void cryptd_hash_update(struct crypto_async_request *req_async, int err) | |
558 | { | |
46309d89 | 559 | struct ahash_request *req = ahash_request_cast(req_async); |
b8a28251 | 560 | struct cryptd_hash_request_ctx *rctx; |
b8a28251 LH |
561 | |
562 | rctx = ahash_request_ctx(req); | |
563 | ||
564 | if (unlikely(err == -EINPROGRESS)) | |
565 | goto out; | |
566 | ||
46309d89 | 567 | err = shash_ahash_update(req, &rctx->desc); |
b8a28251 LH |
568 | |
569 | req->base.complete = rctx->complete; | |
570 | ||
571 | out: | |
81760ea6 | 572 | cryptd_hash_complete(req, err); |
b8a28251 LH |
573 | } |
574 | ||
575 | static int cryptd_hash_update_enqueue(struct ahash_request *req) | |
576 | { | |
577 | return cryptd_hash_enqueue(req, cryptd_hash_update); | |
578 | } | |
579 | ||
580 | static void cryptd_hash_final(struct crypto_async_request *req_async, int err) | |
581 | { | |
46309d89 HX |
582 | struct ahash_request *req = ahash_request_cast(req_async); |
583 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
b8a28251 LH |
584 | |
585 | if (unlikely(err == -EINPROGRESS)) | |
586 | goto out; | |
587 | ||
46309d89 | 588 | err = crypto_shash_final(&rctx->desc, req->result); |
b8a28251 LH |
589 | |
590 | req->base.complete = rctx->complete; | |
591 | ||
592 | out: | |
81760ea6 | 593 | cryptd_hash_complete(req, err); |
b8a28251 LH |
594 | } |
595 | ||
596 | static int cryptd_hash_final_enqueue(struct ahash_request *req) | |
597 | { | |
598 | return cryptd_hash_enqueue(req, cryptd_hash_final); | |
599 | } | |
600 | ||
6fba00d1 HX |
601 | static void cryptd_hash_finup(struct crypto_async_request *req_async, int err) |
602 | { | |
603 | struct ahash_request *req = ahash_request_cast(req_async); | |
604 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
605 | ||
606 | if (unlikely(err == -EINPROGRESS)) | |
607 | goto out; | |
608 | ||
609 | err = shash_ahash_finup(req, &rctx->desc); | |
610 | ||
611 | req->base.complete = rctx->complete; | |
612 | ||
613 | out: | |
81760ea6 | 614 | cryptd_hash_complete(req, err); |
6fba00d1 HX |
615 | } |
616 | ||
617 | static int cryptd_hash_finup_enqueue(struct ahash_request *req) | |
618 | { | |
619 | return cryptd_hash_enqueue(req, cryptd_hash_finup); | |
620 | } | |
621 | ||
b8a28251 LH |
622 | static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) |
623 | { | |
46309d89 HX |
624 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
625 | struct crypto_shash *child = ctx->child; | |
626 | struct ahash_request *req = ahash_request_cast(req_async); | |
627 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
628 | struct shash_desc *desc = &rctx->desc; | |
b8a28251 LH |
629 | |
630 | if (unlikely(err == -EINPROGRESS)) | |
631 | goto out; | |
632 | ||
46309d89 | 633 | desc->tfm = child; |
b8a28251 | 634 | |
46309d89 | 635 | err = shash_ahash_digest(req, desc); |
b8a28251 LH |
636 | |
637 | req->base.complete = rctx->complete; | |
638 | ||
639 | out: | |
81760ea6 | 640 | cryptd_hash_complete(req, err); |
b8a28251 LH |
641 | } |
642 | ||
643 | static int cryptd_hash_digest_enqueue(struct ahash_request *req) | |
644 | { | |
645 | return cryptd_hash_enqueue(req, cryptd_hash_digest); | |
646 | } | |
647 | ||
6fba00d1 HX |
648 | static int cryptd_hash_export(struct ahash_request *req, void *out) |
649 | { | |
650 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
651 | ||
652 | return crypto_shash_export(&rctx->desc, out); | |
653 | } | |
654 | ||
655 | static int cryptd_hash_import(struct ahash_request *req, const void *in) | |
656 | { | |
0bd22235 AB |
657 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
658 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); | |
659 | struct shash_desc *desc = cryptd_shash_desc(req); | |
660 | ||
661 | desc->tfm = ctx->child; | |
6fba00d1 | 662 | |
0bd22235 | 663 | return crypto_shash_import(desc, in); |
6fba00d1 HX |
664 | } |
665 | ||
9cd899a3 HX |
666 | static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, |
667 | struct cryptd_queue *queue) | |
b8a28251 | 668 | { |
46309d89 | 669 | struct hashd_instance_ctx *ctx; |
0b535adf | 670 | struct ahash_instance *inst; |
46309d89 | 671 | struct shash_alg *salg; |
b8a28251 | 672 | struct crypto_alg *alg; |
466a7b9e SM |
673 | u32 type = 0; |
674 | u32 mask = 0; | |
46309d89 | 675 | int err; |
b8a28251 | 676 | |
466a7b9e SM |
677 | cryptd_check_internal(tb, &type, &mask); |
678 | ||
679 | salg = shash_attr_alg(tb[1], type, mask); | |
46309d89 | 680 | if (IS_ERR(salg)) |
9cd899a3 | 681 | return PTR_ERR(salg); |
b8a28251 | 682 | |
46309d89 | 683 | alg = &salg->base; |
0b535adf HX |
684 | inst = cryptd_alloc_instance(alg, ahash_instance_headroom(), |
685 | sizeof(*ctx)); | |
05ed8758 | 686 | err = PTR_ERR(inst); |
b8a28251 LH |
687 | if (IS_ERR(inst)) |
688 | goto out_put_alg; | |
689 | ||
0b535adf | 690 | ctx = ahash_instance_ctx(inst); |
46309d89 HX |
691 | ctx->queue = queue; |
692 | ||
0b535adf HX |
693 | err = crypto_init_shash_spawn(&ctx->spawn, salg, |
694 | ahash_crypto_instance(inst)); | |
46309d89 HX |
695 | if (err) |
696 | goto out_free_inst; | |
697 | ||
a208fa8f EB |
698 | inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC | |
699 | (alg->cra_flags & (CRYPTO_ALG_INTERNAL | | |
700 | CRYPTO_ALG_OPTIONAL_KEY)); | |
b8a28251 | 701 | |
0b535adf | 702 | inst->alg.halg.digestsize = salg->digestsize; |
1a078340 | 703 | inst->alg.halg.statesize = salg->statesize; |
0b535adf | 704 | inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
b8a28251 | 705 | |
0b535adf HX |
706 | inst->alg.halg.base.cra_init = cryptd_hash_init_tfm; |
707 | inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm; | |
b8a28251 | 708 | |
0b535adf HX |
709 | inst->alg.init = cryptd_hash_init_enqueue; |
710 | inst->alg.update = cryptd_hash_update_enqueue; | |
711 | inst->alg.final = cryptd_hash_final_enqueue; | |
6fba00d1 HX |
712 | inst->alg.finup = cryptd_hash_finup_enqueue; |
713 | inst->alg.export = cryptd_hash_export; | |
714 | inst->alg.import = cryptd_hash_import; | |
841a3ff3 EB |
715 | if (crypto_shash_alg_has_setkey(salg)) |
716 | inst->alg.setkey = cryptd_hash_setkey; | |
0b535adf | 717 | inst->alg.digest = cryptd_hash_digest_enqueue; |
b8a28251 | 718 | |
0b535adf | 719 | err = ahash_register_instance(tmpl, inst); |
9cd899a3 HX |
720 | if (err) { |
721 | crypto_drop_shash(&ctx->spawn); | |
722 | out_free_inst: | |
723 | kfree(inst); | |
724 | } | |
725 | ||
b8a28251 LH |
726 | out_put_alg: |
727 | crypto_mod_put(alg); | |
9cd899a3 | 728 | return err; |
b8a28251 LH |
729 | } |
730 | ||
92b9876b HX |
731 | static int cryptd_aead_setkey(struct crypto_aead *parent, |
732 | const u8 *key, unsigned int keylen) | |
733 | { | |
734 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); | |
735 | struct crypto_aead *child = ctx->child; | |
736 | ||
737 | return crypto_aead_setkey(child, key, keylen); | |
738 | } | |
739 | ||
740 | static int cryptd_aead_setauthsize(struct crypto_aead *parent, | |
741 | unsigned int authsize) | |
742 | { | |
743 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); | |
744 | struct crypto_aead *child = ctx->child; | |
745 | ||
746 | return crypto_aead_setauthsize(child, authsize); | |
747 | } | |
748 | ||
298c926c AH |
749 | static void cryptd_aead_crypt(struct aead_request *req, |
750 | struct crypto_aead *child, | |
751 | int err, | |
752 | int (*crypt)(struct aead_request *req)) | |
753 | { | |
754 | struct cryptd_aead_request_ctx *rctx; | |
81760ea6 | 755 | struct cryptd_aead_ctx *ctx; |
ec9f2006 | 756 | crypto_completion_t compl; |
81760ea6 HX |
757 | struct crypto_aead *tfm; |
758 | int refcnt; | |
ec9f2006 | 759 | |
298c926c | 760 | rctx = aead_request_ctx(req); |
ec9f2006 | 761 | compl = rctx->complete; |
298c926c | 762 | |
31bd44e7 HX |
763 | tfm = crypto_aead_reqtfm(req); |
764 | ||
298c926c AH |
765 | if (unlikely(err == -EINPROGRESS)) |
766 | goto out; | |
767 | aead_request_set_tfm(req, child); | |
768 | err = crypt( req ); | |
81760ea6 | 769 | |
298c926c | 770 | out: |
81760ea6 HX |
771 | ctx = crypto_aead_ctx(tfm); |
772 | refcnt = atomic_read(&ctx->refcnt); | |
773 | ||
298c926c | 774 | local_bh_disable(); |
ec9f2006 | 775 | compl(&req->base, err); |
298c926c | 776 | local_bh_enable(); |
81760ea6 HX |
777 | |
778 | if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) | |
779 | crypto_free_aead(tfm); | |
298c926c AH |
780 | } |
781 | ||
782 | static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err) | |
783 | { | |
784 | struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm); | |
785 | struct crypto_aead *child = ctx->child; | |
786 | struct aead_request *req; | |
787 | ||
788 | req = container_of(areq, struct aead_request, base); | |
ba3749a7 | 789 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt); |
298c926c AH |
790 | } |
791 | ||
792 | static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err) | |
793 | { | |
794 | struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm); | |
795 | struct crypto_aead *child = ctx->child; | |
796 | struct aead_request *req; | |
797 | ||
798 | req = container_of(areq, struct aead_request, base); | |
ba3749a7 | 799 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt); |
298c926c AH |
800 | } |
801 | ||
802 | static int cryptd_aead_enqueue(struct aead_request *req, | |
3e3dc25f | 803 | crypto_completion_t compl) |
298c926c AH |
804 | { |
805 | struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req); | |
806 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
807 | struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm)); | |
808 | ||
809 | rctx->complete = req->base.complete; | |
3e3dc25f | 810 | req->base.complete = compl; |
298c926c AH |
811 | return cryptd_enqueue_request(queue, &req->base); |
812 | } | |
813 | ||
814 | static int cryptd_aead_encrypt_enqueue(struct aead_request *req) | |
815 | { | |
816 | return cryptd_aead_enqueue(req, cryptd_aead_encrypt ); | |
817 | } | |
818 | ||
819 | static int cryptd_aead_decrypt_enqueue(struct aead_request *req) | |
820 | { | |
821 | return cryptd_aead_enqueue(req, cryptd_aead_decrypt ); | |
822 | } | |
823 | ||
f614e546 | 824 | static int cryptd_aead_init_tfm(struct crypto_aead *tfm) |
298c926c | 825 | { |
f614e546 HX |
826 | struct aead_instance *inst = aead_alg_instance(tfm); |
827 | struct aead_instance_ctx *ictx = aead_instance_ctx(inst); | |
298c926c | 828 | struct crypto_aead_spawn *spawn = &ictx->aead_spawn; |
f614e546 | 829 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c AH |
830 | struct crypto_aead *cipher; |
831 | ||
832 | cipher = crypto_spawn_aead(spawn); | |
833 | if (IS_ERR(cipher)) | |
834 | return PTR_ERR(cipher); | |
835 | ||
298c926c | 836 | ctx->child = cipher; |
ec9f2006 HX |
837 | crypto_aead_set_reqsize( |
838 | tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx), | |
839 | crypto_aead_reqsize(cipher))); | |
298c926c AH |
840 | return 0; |
841 | } | |
842 | ||
f614e546 | 843 | static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) |
298c926c | 844 | { |
f614e546 | 845 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c AH |
846 | crypto_free_aead(ctx->child); |
847 | } | |
848 | ||
849 | static int cryptd_create_aead(struct crypto_template *tmpl, | |
850 | struct rtattr **tb, | |
851 | struct cryptd_queue *queue) | |
852 | { | |
853 | struct aead_instance_ctx *ctx; | |
f614e546 HX |
854 | struct aead_instance *inst; |
855 | struct aead_alg *alg; | |
9b8c456e HX |
856 | const char *name; |
857 | u32 type = 0; | |
ec9f2006 | 858 | u32 mask = CRYPTO_ALG_ASYNC; |
298c926c AH |
859 | int err; |
860 | ||
466a7b9e SM |
861 | cryptd_check_internal(tb, &type, &mask); |
862 | ||
9b8c456e HX |
863 | name = crypto_attr_alg_name(tb[1]); |
864 | if (IS_ERR(name)) | |
865 | return PTR_ERR(name); | |
298c926c | 866 | |
9b8c456e HX |
867 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
868 | if (!inst) | |
869 | return -ENOMEM; | |
298c926c | 870 | |
f614e546 | 871 | ctx = aead_instance_ctx(inst); |
298c926c AH |
872 | ctx->queue = queue; |
873 | ||
f614e546 | 874 | crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst)); |
9b8c456e | 875 | err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask); |
298c926c AH |
876 | if (err) |
877 | goto out_free_inst; | |
878 | ||
f614e546 HX |
879 | alg = crypto_spawn_aead_alg(&ctx->aead_spawn); |
880 | err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); | |
9b8c456e HX |
881 | if (err) |
882 | goto out_drop_aead; | |
883 | ||
f614e546 | 884 | inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC | |
5e4b8c1f | 885 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); |
f614e546 | 886 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); |
298c926c | 887 | |
f614e546 HX |
888 | inst->alg.ivsize = crypto_aead_alg_ivsize(alg); |
889 | inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); | |
890 | ||
891 | inst->alg.init = cryptd_aead_init_tfm; | |
892 | inst->alg.exit = cryptd_aead_exit_tfm; | |
893 | inst->alg.setkey = cryptd_aead_setkey; | |
894 | inst->alg.setauthsize = cryptd_aead_setauthsize; | |
895 | inst->alg.encrypt = cryptd_aead_encrypt_enqueue; | |
896 | inst->alg.decrypt = cryptd_aead_decrypt_enqueue; | |
897 | ||
898 | err = aead_register_instance(tmpl, inst); | |
298c926c | 899 | if (err) { |
9b8c456e HX |
900 | out_drop_aead: |
901 | crypto_drop_aead(&ctx->aead_spawn); | |
298c926c AH |
902 | out_free_inst: |
903 | kfree(inst); | |
904 | } | |
298c926c AH |
905 | return err; |
906 | } | |
907 | ||
254eff77 | 908 | static struct cryptd_queue queue; |
124b53d0 | 909 | |
9cd899a3 | 910 | static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) |
124b53d0 HX |
911 | { |
912 | struct crypto_attr_type *algt; | |
913 | ||
914 | algt = crypto_get_attr_type(tb); | |
915 | if (IS_ERR(algt)) | |
9cd899a3 | 916 | return PTR_ERR(algt); |
124b53d0 HX |
917 | |
918 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { | |
919 | case CRYPTO_ALG_TYPE_BLKCIPHER: | |
4e0958d1 | 920 | return cryptd_create_skcipher(tmpl, tb, &queue); |
b8a28251 | 921 | case CRYPTO_ALG_TYPE_DIGEST: |
9cd899a3 | 922 | return cryptd_create_hash(tmpl, tb, &queue); |
298c926c AH |
923 | case CRYPTO_ALG_TYPE_AEAD: |
924 | return cryptd_create_aead(tmpl, tb, &queue); | |
124b53d0 HX |
925 | } |
926 | ||
9cd899a3 | 927 | return -EINVAL; |
124b53d0 HX |
928 | } |
929 | ||
930 | static void cryptd_free(struct crypto_instance *inst) | |
931 | { | |
932 | struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst); | |
0b535adf | 933 | struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst); |
298c926c | 934 | struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst); |
0b535adf HX |
935 | |
936 | switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) { | |
937 | case CRYPTO_ALG_TYPE_AHASH: | |
938 | crypto_drop_shash(&hctx->spawn); | |
939 | kfree(ahash_instance(inst)); | |
940 | return; | |
298c926c | 941 | case CRYPTO_ALG_TYPE_AEAD: |
f614e546 HX |
942 | crypto_drop_aead(&aead_ctx->aead_spawn); |
943 | kfree(aead_instance(inst)); | |
298c926c AH |
944 | return; |
945 | default: | |
946 | crypto_drop_spawn(&ctx->spawn); | |
947 | kfree(inst); | |
0b535adf | 948 | } |
124b53d0 HX |
949 | } |
950 | ||
951 | static struct crypto_template cryptd_tmpl = { | |
952 | .name = "cryptd", | |
9cd899a3 | 953 | .create = cryptd_create, |
124b53d0 HX |
954 | .free = cryptd_free, |
955 | .module = THIS_MODULE, | |
956 | }; | |
957 | ||
4e0958d1 HX |
958 | struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name, |
959 | u32 type, u32 mask) | |
960 | { | |
961 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
962 | struct cryptd_skcipher_ctx *ctx; | |
963 | struct crypto_skcipher *tfm; | |
964 | ||
965 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
966 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
967 | return ERR_PTR(-EINVAL); | |
968 | ||
969 | tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask); | |
970 | if (IS_ERR(tfm)) | |
971 | return ERR_CAST(tfm); | |
972 | ||
973 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
974 | crypto_free_skcipher(tfm); | |
975 | return ERR_PTR(-EINVAL); | |
976 | } | |
977 | ||
978 | ctx = crypto_skcipher_ctx(tfm); | |
979 | atomic_set(&ctx->refcnt, 1); | |
980 | ||
981 | return container_of(tfm, struct cryptd_skcipher, base); | |
982 | } | |
983 | EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher); | |
984 | ||
985 | struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm) | |
986 | { | |
987 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
988 | ||
36b3875a | 989 | return &ctx->child->base; |
4e0958d1 HX |
990 | } |
991 | EXPORT_SYMBOL_GPL(cryptd_skcipher_child); | |
992 | ||
993 | bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm) | |
994 | { | |
995 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
996 | ||
997 | return atomic_read(&ctx->refcnt) - 1; | |
998 | } | |
999 | EXPORT_SYMBOL_GPL(cryptd_skcipher_queued); | |
1000 | ||
1001 | void cryptd_free_skcipher(struct cryptd_skcipher *tfm) | |
1002 | { | |
1003 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
1004 | ||
1005 | if (atomic_dec_and_test(&ctx->refcnt)) | |
1006 | crypto_free_skcipher(&tfm->base); | |
1007 | } | |
1008 | EXPORT_SYMBOL_GPL(cryptd_free_skcipher); | |
1009 | ||
ace13663 HY |
1010 | struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, |
1011 | u32 type, u32 mask) | |
1012 | { | |
1013 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
81760ea6 | 1014 | struct cryptd_hash_ctx *ctx; |
ace13663 HY |
1015 | struct crypto_ahash *tfm; |
1016 | ||
1017 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
1018 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
1019 | return ERR_PTR(-EINVAL); | |
1020 | tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask); | |
1021 | if (IS_ERR(tfm)) | |
1022 | return ERR_CAST(tfm); | |
1023 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
1024 | crypto_free_ahash(tfm); | |
1025 | return ERR_PTR(-EINVAL); | |
1026 | } | |
1027 | ||
81760ea6 HX |
1028 | ctx = crypto_ahash_ctx(tfm); |
1029 | atomic_set(&ctx->refcnt, 1); | |
1030 | ||
ace13663 HY |
1031 | return __cryptd_ahash_cast(tfm); |
1032 | } | |
1033 | EXPORT_SYMBOL_GPL(cryptd_alloc_ahash); | |
1034 | ||
1035 | struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm) | |
1036 | { | |
1037 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
1038 | ||
1039 | return ctx->child; | |
1040 | } | |
1041 | EXPORT_SYMBOL_GPL(cryptd_ahash_child); | |
1042 | ||
0e1227d3 HY |
1043 | struct shash_desc *cryptd_shash_desc(struct ahash_request *req) |
1044 | { | |
1045 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
1046 | return &rctx->desc; | |
1047 | } | |
1048 | EXPORT_SYMBOL_GPL(cryptd_shash_desc); | |
1049 | ||
81760ea6 HX |
1050 | bool cryptd_ahash_queued(struct cryptd_ahash *tfm) |
1051 | { | |
1052 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
1053 | ||
1054 | return atomic_read(&ctx->refcnt) - 1; | |
1055 | } | |
1056 | EXPORT_SYMBOL_GPL(cryptd_ahash_queued); | |
1057 | ||
ace13663 HY |
1058 | void cryptd_free_ahash(struct cryptd_ahash *tfm) |
1059 | { | |
81760ea6 HX |
1060 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
1061 | ||
1062 | if (atomic_dec_and_test(&ctx->refcnt)) | |
1063 | crypto_free_ahash(&tfm->base); | |
ace13663 HY |
1064 | } |
1065 | EXPORT_SYMBOL_GPL(cryptd_free_ahash); | |
1066 | ||
298c926c AH |
1067 | struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, |
1068 | u32 type, u32 mask) | |
1069 | { | |
1070 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
81760ea6 | 1071 | struct cryptd_aead_ctx *ctx; |
298c926c AH |
1072 | struct crypto_aead *tfm; |
1073 | ||
1074 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
1075 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
1076 | return ERR_PTR(-EINVAL); | |
1077 | tfm = crypto_alloc_aead(cryptd_alg_name, type, mask); | |
1078 | if (IS_ERR(tfm)) | |
1079 | return ERR_CAST(tfm); | |
1080 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
1081 | crypto_free_aead(tfm); | |
1082 | return ERR_PTR(-EINVAL); | |
1083 | } | |
81760ea6 HX |
1084 | |
1085 | ctx = crypto_aead_ctx(tfm); | |
1086 | atomic_set(&ctx->refcnt, 1); | |
1087 | ||
298c926c AH |
1088 | return __cryptd_aead_cast(tfm); |
1089 | } | |
1090 | EXPORT_SYMBOL_GPL(cryptd_alloc_aead); | |
1091 | ||
1092 | struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm) | |
1093 | { | |
1094 | struct cryptd_aead_ctx *ctx; | |
1095 | ctx = crypto_aead_ctx(&tfm->base); | |
1096 | return ctx->child; | |
1097 | } | |
1098 | EXPORT_SYMBOL_GPL(cryptd_aead_child); | |
1099 | ||
81760ea6 HX |
1100 | bool cryptd_aead_queued(struct cryptd_aead *tfm) |
1101 | { | |
1102 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); | |
1103 | ||
1104 | return atomic_read(&ctx->refcnt) - 1; | |
1105 | } | |
1106 | EXPORT_SYMBOL_GPL(cryptd_aead_queued); | |
1107 | ||
298c926c AH |
1108 | void cryptd_free_aead(struct cryptd_aead *tfm) |
1109 | { | |
81760ea6 HX |
1110 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); |
1111 | ||
1112 | if (atomic_dec_and_test(&ctx->refcnt)) | |
1113 | crypto_free_aead(&tfm->base); | |
298c926c AH |
1114 | } |
1115 | EXPORT_SYMBOL_GPL(cryptd_free_aead); | |
1116 | ||
124b53d0 HX |
1117 | static int __init cryptd_init(void) |
1118 | { | |
1119 | int err; | |
1120 | ||
c3a53605 | 1121 | err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen); |
124b53d0 HX |
1122 | if (err) |
1123 | return err; | |
1124 | ||
1125 | err = crypto_register_template(&cryptd_tmpl); | |
1126 | if (err) | |
254eff77 | 1127 | cryptd_fini_queue(&queue); |
124b53d0 HX |
1128 | |
1129 | return err; | |
1130 | } | |
1131 | ||
1132 | static void __exit cryptd_exit(void) | |
1133 | { | |
254eff77 | 1134 | cryptd_fini_queue(&queue); |
124b53d0 HX |
1135 | crypto_unregister_template(&cryptd_tmpl); |
1136 | } | |
1137 | ||
b2bac6ac | 1138 | subsys_initcall(cryptd_init); |
124b53d0 HX |
1139 | module_exit(cryptd_exit); |
1140 | ||
1141 | MODULE_LICENSE("GPL"); | |
1142 | MODULE_DESCRIPTION("Software async crypto daemon"); | |
4943ba16 | 1143 | MODULE_ALIAS_CRYPTO("cryptd"); |