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Commit | Line | Data |
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124b53d0 HX |
1 | /* |
2 | * Software async crypto daemon. | |
3 | * | |
4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
298c926c AH |
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 | * | |
124b53d0 HX |
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 | ||
18e33e6d | 20 | #include <crypto/internal/hash.h> |
298c926c | 21 | #include <crypto/internal/aead.h> |
4e0958d1 | 22 | #include <crypto/internal/skcipher.h> |
1cac2cbc | 23 | #include <crypto/cryptd.h> |
254eff77 | 24 | #include <crypto/crypto_wq.h> |
81760ea6 | 25 | #include <linux/atomic.h> |
124b53d0 HX |
26 | #include <linux/err.h> |
27 | #include <linux/init.h> | |
28 | #include <linux/kernel.h> | |
124b53d0 HX |
29 | #include <linux/list.h> |
30 | #include <linux/module.h> | |
124b53d0 HX |
31 | #include <linux/scatterlist.h> |
32 | #include <linux/sched.h> | |
33 | #include <linux/slab.h> | |
124b53d0 | 34 | |
eaf356e4 | 35 | static unsigned int cryptd_max_cpu_qlen = 1000; |
c3a53605 JM |
36 | module_param(cryptd_max_cpu_qlen, uint, 0); |
37 | MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth"); | |
124b53d0 | 38 | |
254eff77 | 39 | struct cryptd_cpu_queue { |
124b53d0 | 40 | struct crypto_queue queue; |
254eff77 HY |
41 | struct work_struct work; |
42 | }; | |
43 | ||
44 | struct cryptd_queue { | |
a29d8b8e | 45 | struct cryptd_cpu_queue __percpu *cpu_queue; |
124b53d0 HX |
46 | }; |
47 | ||
48 | struct cryptd_instance_ctx { | |
49 | struct crypto_spawn spawn; | |
254eff77 | 50 | struct cryptd_queue *queue; |
124b53d0 HX |
51 | }; |
52 | ||
4e0958d1 HX |
53 | struct skcipherd_instance_ctx { |
54 | struct crypto_skcipher_spawn spawn; | |
55 | struct cryptd_queue *queue; | |
56 | }; | |
57 | ||
46309d89 HX |
58 | struct hashd_instance_ctx { |
59 | struct crypto_shash_spawn spawn; | |
60 | struct cryptd_queue *queue; | |
61 | }; | |
62 | ||
298c926c AH |
63 | struct aead_instance_ctx { |
64 | struct crypto_aead_spawn aead_spawn; | |
65 | struct cryptd_queue *queue; | |
66 | }; | |
67 | ||
4e0958d1 HX |
68 | struct cryptd_skcipher_ctx { |
69 | atomic_t refcnt; | |
36b3875a | 70 | struct crypto_sync_skcipher *child; |
4e0958d1 HX |
71 | }; |
72 | ||
73 | struct cryptd_skcipher_request_ctx { | |
74 | crypto_completion_t complete; | |
75 | }; | |
76 | ||
b8a28251 | 77 | struct cryptd_hash_ctx { |
81760ea6 | 78 | atomic_t refcnt; |
46309d89 | 79 | struct crypto_shash *child; |
b8a28251 LH |
80 | }; |
81 | ||
82 | struct cryptd_hash_request_ctx { | |
83 | crypto_completion_t complete; | |
46309d89 | 84 | struct shash_desc desc; |
b8a28251 | 85 | }; |
124b53d0 | 86 | |
298c926c | 87 | struct cryptd_aead_ctx { |
81760ea6 | 88 | atomic_t refcnt; |
298c926c AH |
89 | struct crypto_aead *child; |
90 | }; | |
91 | ||
92 | struct cryptd_aead_request_ctx { | |
93 | crypto_completion_t complete; | |
94 | }; | |
95 | ||
254eff77 HY |
96 | static void cryptd_queue_worker(struct work_struct *work); |
97 | ||
98 | static int cryptd_init_queue(struct cryptd_queue *queue, | |
99 | unsigned int max_cpu_qlen) | |
100 | { | |
101 | int cpu; | |
102 | struct cryptd_cpu_queue *cpu_queue; | |
103 | ||
104 | queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue); | |
105 | if (!queue->cpu_queue) | |
106 | return -ENOMEM; | |
107 | for_each_possible_cpu(cpu) { | |
108 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); | |
109 | crypto_init_queue(&cpu_queue->queue, max_cpu_qlen); | |
110 | INIT_WORK(&cpu_queue->work, cryptd_queue_worker); | |
111 | } | |
c3a53605 | 112 | pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen); |
254eff77 HY |
113 | return 0; |
114 | } | |
115 | ||
116 | static void cryptd_fini_queue(struct cryptd_queue *queue) | |
117 | { | |
118 | int cpu; | |
119 | struct cryptd_cpu_queue *cpu_queue; | |
120 | ||
121 | for_each_possible_cpu(cpu) { | |
122 | cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu); | |
123 | BUG_ON(cpu_queue->queue.qlen); | |
124 | } | |
125 | free_percpu(queue->cpu_queue); | |
126 | } | |
127 | ||
128 | static int cryptd_enqueue_request(struct cryptd_queue *queue, | |
129 | struct crypto_async_request *request) | |
130 | { | |
131 | int cpu, err; | |
132 | struct cryptd_cpu_queue *cpu_queue; | |
81760ea6 | 133 | atomic_t *refcnt; |
254eff77 HY |
134 | |
135 | cpu = get_cpu(); | |
0b44f486 | 136 | cpu_queue = this_cpu_ptr(queue->cpu_queue); |
254eff77 | 137 | err = crypto_enqueue_request(&cpu_queue->queue, request); |
81760ea6 HX |
138 | |
139 | refcnt = crypto_tfm_ctx(request->tfm); | |
81760ea6 | 140 | |
6b80ea38 | 141 | if (err == -ENOSPC) |
81760ea6 HX |
142 | goto out_put_cpu; |
143 | ||
254eff77 | 144 | queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); |
81760ea6 HX |
145 | |
146 | if (!atomic_read(refcnt)) | |
147 | goto out_put_cpu; | |
148 | ||
81760ea6 HX |
149 | atomic_inc(refcnt); |
150 | ||
151 | out_put_cpu: | |
254eff77 HY |
152 | put_cpu(); |
153 | ||
154 | return err; | |
155 | } | |
156 | ||
157 | /* Called in workqueue context, do one real cryption work (via | |
158 | * req->complete) and reschedule itself if there are more work to | |
159 | * do. */ | |
160 | static void cryptd_queue_worker(struct work_struct *work) | |
161 | { | |
162 | struct cryptd_cpu_queue *cpu_queue; | |
163 | struct crypto_async_request *req, *backlog; | |
164 | ||
165 | cpu_queue = container_of(work, struct cryptd_cpu_queue, work); | |
9efade1b JK |
166 | /* |
167 | * Only handle one request at a time to avoid hogging crypto workqueue. | |
168 | * preempt_disable/enable is used to prevent being preempted by | |
169 | * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent | |
170 | * cryptd_enqueue_request() being accessed from software interrupts. | |
171 | */ | |
172 | local_bh_disable(); | |
254eff77 HY |
173 | preempt_disable(); |
174 | backlog = crypto_get_backlog(&cpu_queue->queue); | |
175 | req = crypto_dequeue_request(&cpu_queue->queue); | |
176 | preempt_enable(); | |
9efade1b | 177 | local_bh_enable(); |
254eff77 HY |
178 | |
179 | if (!req) | |
180 | return; | |
181 | ||
182 | if (backlog) | |
183 | backlog->complete(backlog, -EINPROGRESS); | |
184 | req->complete(req, 0); | |
185 | ||
186 | if (cpu_queue->queue.qlen) | |
187 | queue_work(kcrypto_wq, &cpu_queue->work); | |
188 | } | |
189 | ||
190 | static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm) | |
124b53d0 HX |
191 | { |
192 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); | |
193 | struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst); | |
254eff77 | 194 | return ictx->queue; |
124b53d0 HX |
195 | } |
196 | ||
466a7b9e SM |
197 | static inline void cryptd_check_internal(struct rtattr **tb, u32 *type, |
198 | u32 *mask) | |
199 | { | |
200 | struct crypto_attr_type *algt; | |
201 | ||
202 | algt = crypto_get_attr_type(tb); | |
203 | if (IS_ERR(algt)) | |
204 | return; | |
f6da3205 | 205 | |
5e4b8c1f HX |
206 | *type |= algt->type & CRYPTO_ALG_INTERNAL; |
207 | *mask |= algt->mask & CRYPTO_ALG_INTERNAL; | |
466a7b9e SM |
208 | } |
209 | ||
9b8c456e HX |
210 | static int cryptd_init_instance(struct crypto_instance *inst, |
211 | struct crypto_alg *alg) | |
212 | { | |
213 | if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, | |
214 | "cryptd(%s)", | |
215 | alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) | |
216 | return -ENAMETOOLONG; | |
217 | ||
218 | memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); | |
219 | ||
220 | inst->alg.cra_priority = alg->cra_priority + 50; | |
221 | inst->alg.cra_blocksize = alg->cra_blocksize; | |
222 | inst->alg.cra_alignmask = alg->cra_alignmask; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
0b535adf HX |
227 | static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head, |
228 | unsigned int tail) | |
124b53d0 | 229 | { |
0b535adf | 230 | char *p; |
124b53d0 | 231 | struct crypto_instance *inst; |
124b53d0 HX |
232 | int err; |
233 | ||
0b535adf HX |
234 | p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL); |
235 | if (!p) | |
236 | return ERR_PTR(-ENOMEM); | |
237 | ||
238 | inst = (void *)(p + head); | |
124b53d0 | 239 | |
9b8c456e HX |
240 | err = cryptd_init_instance(inst, alg); |
241 | if (err) | |
124b53d0 HX |
242 | goto out_free_inst; |
243 | ||
124b53d0 | 244 | out: |
0b535adf | 245 | return p; |
124b53d0 HX |
246 | |
247 | out_free_inst: | |
0b535adf HX |
248 | kfree(p); |
249 | p = ERR_PTR(err); | |
124b53d0 HX |
250 | goto out; |
251 | } | |
252 | ||
4e0958d1 HX |
253 | static int cryptd_skcipher_setkey(struct crypto_skcipher *parent, |
254 | const u8 *key, unsigned int keylen) | |
255 | { | |
256 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent); | |
36b3875a | 257 | struct crypto_sync_skcipher *child = ctx->child; |
4e0958d1 HX |
258 | int err; |
259 | ||
36b3875a KC |
260 | crypto_sync_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
261 | crypto_sync_skcipher_set_flags(child, | |
262 | crypto_skcipher_get_flags(parent) & | |
4e0958d1 | 263 | CRYPTO_TFM_REQ_MASK); |
36b3875a KC |
264 | err = crypto_sync_skcipher_setkey(child, key, keylen); |
265 | crypto_skcipher_set_flags(parent, | |
266 | crypto_sync_skcipher_get_flags(child) & | |
4e0958d1 HX |
267 | CRYPTO_TFM_RES_MASK); |
268 | return err; | |
269 | } | |
270 | ||
271 | static void cryptd_skcipher_complete(struct skcipher_request *req, int err) | |
272 | { | |
273 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
274 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
275 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
276 | int refcnt = atomic_read(&ctx->refcnt); | |
277 | ||
278 | local_bh_disable(); | |
279 | rctx->complete(&req->base, err); | |
280 | local_bh_enable(); | |
281 | ||
282 | if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) | |
283 | crypto_free_skcipher(tfm); | |
284 | } | |
285 | ||
286 | static void cryptd_skcipher_encrypt(struct crypto_async_request *base, | |
287 | int err) | |
288 | { | |
289 | struct skcipher_request *req = skcipher_request_cast(base); | |
290 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
291 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
292 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
36b3875a KC |
293 | struct crypto_sync_skcipher *child = ctx->child; |
294 | SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); | |
4e0958d1 HX |
295 | |
296 | if (unlikely(err == -EINPROGRESS)) | |
297 | goto out; | |
298 | ||
36b3875a | 299 | skcipher_request_set_sync_tfm(subreq, child); |
4e0958d1 HX |
300 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, |
301 | NULL, NULL); | |
302 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, | |
303 | req->iv); | |
304 | ||
305 | err = crypto_skcipher_encrypt(subreq); | |
306 | skcipher_request_zero(subreq); | |
307 | ||
308 | req->base.complete = rctx->complete; | |
309 | ||
310 | out: | |
311 | cryptd_skcipher_complete(req, err); | |
312 | } | |
313 | ||
314 | static void cryptd_skcipher_decrypt(struct crypto_async_request *base, | |
315 | int err) | |
316 | { | |
317 | struct skcipher_request *req = skcipher_request_cast(base); | |
318 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
319 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
320 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
36b3875a KC |
321 | struct crypto_sync_skcipher *child = ctx->child; |
322 | SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, child); | |
4e0958d1 HX |
323 | |
324 | if (unlikely(err == -EINPROGRESS)) | |
325 | goto out; | |
326 | ||
36b3875a | 327 | skcipher_request_set_sync_tfm(subreq, child); |
4e0958d1 HX |
328 | skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP, |
329 | NULL, NULL); | |
330 | skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, | |
331 | req->iv); | |
332 | ||
333 | err = crypto_skcipher_decrypt(subreq); | |
334 | skcipher_request_zero(subreq); | |
335 | ||
336 | req->base.complete = rctx->complete; | |
337 | ||
338 | out: | |
339 | cryptd_skcipher_complete(req, err); | |
340 | } | |
341 | ||
342 | static int cryptd_skcipher_enqueue(struct skcipher_request *req, | |
343 | crypto_completion_t compl) | |
344 | { | |
345 | struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req); | |
346 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); | |
347 | struct cryptd_queue *queue; | |
348 | ||
349 | queue = cryptd_get_queue(crypto_skcipher_tfm(tfm)); | |
350 | rctx->complete = req->base.complete; | |
351 | req->base.complete = compl; | |
352 | ||
353 | return cryptd_enqueue_request(queue, &req->base); | |
354 | } | |
355 | ||
356 | static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req) | |
357 | { | |
358 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt); | |
359 | } | |
360 | ||
361 | static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req) | |
362 | { | |
363 | return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt); | |
364 | } | |
365 | ||
366 | static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm) | |
367 | { | |
368 | struct skcipher_instance *inst = skcipher_alg_instance(tfm); | |
369 | struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst); | |
370 | struct crypto_skcipher_spawn *spawn = &ictx->spawn; | |
371 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
372 | struct crypto_skcipher *cipher; | |
373 | ||
374 | cipher = crypto_spawn_skcipher(spawn); | |
375 | if (IS_ERR(cipher)) | |
376 | return PTR_ERR(cipher); | |
377 | ||
36b3875a | 378 | ctx->child = (struct crypto_sync_skcipher *)cipher; |
4e0958d1 HX |
379 | crypto_skcipher_set_reqsize( |
380 | tfm, sizeof(struct cryptd_skcipher_request_ctx)); | |
381 | return 0; | |
382 | } | |
383 | ||
384 | static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm) | |
385 | { | |
386 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm); | |
387 | ||
36b3875a | 388 | crypto_free_sync_skcipher(ctx->child); |
4e0958d1 HX |
389 | } |
390 | ||
391 | static void cryptd_skcipher_free(struct skcipher_instance *inst) | |
392 | { | |
393 | struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst); | |
394 | ||
395 | crypto_drop_skcipher(&ctx->spawn); | |
396 | } | |
397 | ||
398 | static int cryptd_create_skcipher(struct crypto_template *tmpl, | |
399 | struct rtattr **tb, | |
400 | struct cryptd_queue *queue) | |
401 | { | |
402 | struct skcipherd_instance_ctx *ctx; | |
403 | struct skcipher_instance *inst; | |
404 | struct skcipher_alg *alg; | |
405 | const char *name; | |
406 | u32 type; | |
407 | u32 mask; | |
408 | int err; | |
409 | ||
410 | type = 0; | |
411 | mask = CRYPTO_ALG_ASYNC; | |
412 | ||
413 | cryptd_check_internal(tb, &type, &mask); | |
414 | ||
415 | name = crypto_attr_alg_name(tb[1]); | |
416 | if (IS_ERR(name)) | |
417 | return PTR_ERR(name); | |
418 | ||
419 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); | |
420 | if (!inst) | |
421 | return -ENOMEM; | |
422 | ||
423 | ctx = skcipher_instance_ctx(inst); | |
424 | ctx->queue = queue; | |
425 | ||
426 | crypto_set_skcipher_spawn(&ctx->spawn, skcipher_crypto_instance(inst)); | |
427 | err = crypto_grab_skcipher(&ctx->spawn, name, type, mask); | |
428 | if (err) | |
429 | goto out_free_inst; | |
430 | ||
431 | alg = crypto_spawn_skcipher_alg(&ctx->spawn); | |
432 | err = cryptd_init_instance(skcipher_crypto_instance(inst), &alg->base); | |
433 | if (err) | |
434 | goto out_drop_skcipher; | |
435 | ||
436 | inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC | | |
437 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); | |
438 | ||
439 | inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg); | |
440 | inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg); | |
441 | inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); | |
442 | inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); | |
443 | ||
444 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_skcipher_ctx); | |
445 | ||
446 | inst->alg.init = cryptd_skcipher_init_tfm; | |
447 | inst->alg.exit = cryptd_skcipher_exit_tfm; | |
448 | ||
449 | inst->alg.setkey = cryptd_skcipher_setkey; | |
450 | inst->alg.encrypt = cryptd_skcipher_encrypt_enqueue; | |
451 | inst->alg.decrypt = cryptd_skcipher_decrypt_enqueue; | |
452 | ||
453 | inst->free = cryptd_skcipher_free; | |
454 | ||
455 | err = skcipher_register_instance(tmpl, inst); | |
456 | if (err) { | |
457 | out_drop_skcipher: | |
458 | crypto_drop_skcipher(&ctx->spawn); | |
459 | out_free_inst: | |
460 | kfree(inst); | |
461 | } | |
462 | return err; | |
463 | } | |
464 | ||
b8a28251 LH |
465 | static int cryptd_hash_init_tfm(struct crypto_tfm *tfm) |
466 | { | |
467 | struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); | |
46309d89 HX |
468 | struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst); |
469 | struct crypto_shash_spawn *spawn = &ictx->spawn; | |
b8a28251 | 470 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); |
46309d89 | 471 | struct crypto_shash *hash; |
b8a28251 | 472 | |
46309d89 HX |
473 | hash = crypto_spawn_shash(spawn); |
474 | if (IS_ERR(hash)) | |
475 | return PTR_ERR(hash); | |
b8a28251 | 476 | |
46309d89 | 477 | ctx->child = hash; |
0d6669e2 HX |
478 | crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
479 | sizeof(struct cryptd_hash_request_ctx) + | |
480 | crypto_shash_descsize(hash)); | |
b8a28251 LH |
481 | return 0; |
482 | } | |
483 | ||
484 | static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm) | |
485 | { | |
486 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm); | |
b8a28251 | 487 | |
46309d89 | 488 | crypto_free_shash(ctx->child); |
b8a28251 LH |
489 | } |
490 | ||
491 | static int cryptd_hash_setkey(struct crypto_ahash *parent, | |
492 | const u8 *key, unsigned int keylen) | |
493 | { | |
494 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(parent); | |
46309d89 | 495 | struct crypto_shash *child = ctx->child; |
b8a28251 LH |
496 | int err; |
497 | ||
46309d89 HX |
498 | crypto_shash_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
499 | crypto_shash_set_flags(child, crypto_ahash_get_flags(parent) & | |
500 | CRYPTO_TFM_REQ_MASK); | |
501 | err = crypto_shash_setkey(child, key, keylen); | |
502 | crypto_ahash_set_flags(parent, crypto_shash_get_flags(child) & | |
503 | CRYPTO_TFM_RES_MASK); | |
b8a28251 LH |
504 | return err; |
505 | } | |
506 | ||
507 | static int cryptd_hash_enqueue(struct ahash_request *req, | |
3e3dc25f | 508 | crypto_completion_t compl) |
b8a28251 LH |
509 | { |
510 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
511 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
254eff77 HY |
512 | struct cryptd_queue *queue = |
513 | cryptd_get_queue(crypto_ahash_tfm(tfm)); | |
b8a28251 LH |
514 | |
515 | rctx->complete = req->base.complete; | |
3e3dc25f | 516 | req->base.complete = compl; |
b8a28251 | 517 | |
254eff77 | 518 | return cryptd_enqueue_request(queue, &req->base); |
b8a28251 LH |
519 | } |
520 | ||
81760ea6 HX |
521 | static void cryptd_hash_complete(struct ahash_request *req, int err) |
522 | { | |
523 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); | |
524 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); | |
525 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
526 | int refcnt = atomic_read(&ctx->refcnt); | |
527 | ||
528 | local_bh_disable(); | |
529 | rctx->complete(&req->base, err); | |
530 | local_bh_enable(); | |
531 | ||
532 | if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) | |
533 | crypto_free_ahash(tfm); | |
534 | } | |
535 | ||
b8a28251 LH |
536 | static void cryptd_hash_init(struct crypto_async_request *req_async, int err) |
537 | { | |
46309d89 HX |
538 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
539 | struct crypto_shash *child = ctx->child; | |
540 | struct ahash_request *req = ahash_request_cast(req_async); | |
541 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
542 | struct shash_desc *desc = &rctx->desc; | |
b8a28251 LH |
543 | |
544 | if (unlikely(err == -EINPROGRESS)) | |
545 | goto out; | |
546 | ||
46309d89 | 547 | desc->tfm = child; |
b8a28251 | 548 | |
46309d89 | 549 | err = crypto_shash_init(desc); |
b8a28251 LH |
550 | |
551 | req->base.complete = rctx->complete; | |
552 | ||
553 | out: | |
81760ea6 | 554 | cryptd_hash_complete(req, err); |
b8a28251 LH |
555 | } |
556 | ||
557 | static int cryptd_hash_init_enqueue(struct ahash_request *req) | |
558 | { | |
559 | return cryptd_hash_enqueue(req, cryptd_hash_init); | |
560 | } | |
561 | ||
562 | static void cryptd_hash_update(struct crypto_async_request *req_async, int err) | |
563 | { | |
46309d89 | 564 | struct ahash_request *req = ahash_request_cast(req_async); |
b8a28251 | 565 | struct cryptd_hash_request_ctx *rctx; |
b8a28251 LH |
566 | |
567 | rctx = ahash_request_ctx(req); | |
568 | ||
569 | if (unlikely(err == -EINPROGRESS)) | |
570 | goto out; | |
571 | ||
46309d89 | 572 | err = shash_ahash_update(req, &rctx->desc); |
b8a28251 LH |
573 | |
574 | req->base.complete = rctx->complete; | |
575 | ||
576 | out: | |
81760ea6 | 577 | cryptd_hash_complete(req, err); |
b8a28251 LH |
578 | } |
579 | ||
580 | static int cryptd_hash_update_enqueue(struct ahash_request *req) | |
581 | { | |
582 | return cryptd_hash_enqueue(req, cryptd_hash_update); | |
583 | } | |
584 | ||
585 | static void cryptd_hash_final(struct crypto_async_request *req_async, int err) | |
586 | { | |
46309d89 HX |
587 | struct ahash_request *req = ahash_request_cast(req_async); |
588 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
b8a28251 LH |
589 | |
590 | if (unlikely(err == -EINPROGRESS)) | |
591 | goto out; | |
592 | ||
46309d89 | 593 | err = crypto_shash_final(&rctx->desc, req->result); |
b8a28251 LH |
594 | |
595 | req->base.complete = rctx->complete; | |
596 | ||
597 | out: | |
81760ea6 | 598 | cryptd_hash_complete(req, err); |
b8a28251 LH |
599 | } |
600 | ||
601 | static int cryptd_hash_final_enqueue(struct ahash_request *req) | |
602 | { | |
603 | return cryptd_hash_enqueue(req, cryptd_hash_final); | |
604 | } | |
605 | ||
6fba00d1 HX |
606 | static void cryptd_hash_finup(struct crypto_async_request *req_async, int err) |
607 | { | |
608 | struct ahash_request *req = ahash_request_cast(req_async); | |
609 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
610 | ||
611 | if (unlikely(err == -EINPROGRESS)) | |
612 | goto out; | |
613 | ||
614 | err = shash_ahash_finup(req, &rctx->desc); | |
615 | ||
616 | req->base.complete = rctx->complete; | |
617 | ||
618 | out: | |
81760ea6 | 619 | cryptd_hash_complete(req, err); |
6fba00d1 HX |
620 | } |
621 | ||
622 | static int cryptd_hash_finup_enqueue(struct ahash_request *req) | |
623 | { | |
624 | return cryptd_hash_enqueue(req, cryptd_hash_finup); | |
625 | } | |
626 | ||
b8a28251 LH |
627 | static void cryptd_hash_digest(struct crypto_async_request *req_async, int err) |
628 | { | |
46309d89 HX |
629 | struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm); |
630 | struct crypto_shash *child = ctx->child; | |
631 | struct ahash_request *req = ahash_request_cast(req_async); | |
632 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
633 | struct shash_desc *desc = &rctx->desc; | |
b8a28251 LH |
634 | |
635 | if (unlikely(err == -EINPROGRESS)) | |
636 | goto out; | |
637 | ||
46309d89 | 638 | desc->tfm = child; |
b8a28251 | 639 | |
46309d89 | 640 | err = shash_ahash_digest(req, desc); |
b8a28251 LH |
641 | |
642 | req->base.complete = rctx->complete; | |
643 | ||
644 | out: | |
81760ea6 | 645 | cryptd_hash_complete(req, err); |
b8a28251 LH |
646 | } |
647 | ||
648 | static int cryptd_hash_digest_enqueue(struct ahash_request *req) | |
649 | { | |
650 | return cryptd_hash_enqueue(req, cryptd_hash_digest); | |
651 | } | |
652 | ||
6fba00d1 HX |
653 | static int cryptd_hash_export(struct ahash_request *req, void *out) |
654 | { | |
655 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
656 | ||
657 | return crypto_shash_export(&rctx->desc, out); | |
658 | } | |
659 | ||
660 | static int cryptd_hash_import(struct ahash_request *req, const void *in) | |
661 | { | |
0bd22235 AB |
662 | struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
663 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm); | |
664 | struct shash_desc *desc = cryptd_shash_desc(req); | |
665 | ||
666 | desc->tfm = ctx->child; | |
6fba00d1 | 667 | |
0bd22235 | 668 | return crypto_shash_import(desc, in); |
6fba00d1 HX |
669 | } |
670 | ||
9cd899a3 HX |
671 | static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, |
672 | struct cryptd_queue *queue) | |
b8a28251 | 673 | { |
46309d89 | 674 | struct hashd_instance_ctx *ctx; |
0b535adf | 675 | struct ahash_instance *inst; |
46309d89 | 676 | struct shash_alg *salg; |
b8a28251 | 677 | struct crypto_alg *alg; |
466a7b9e SM |
678 | u32 type = 0; |
679 | u32 mask = 0; | |
46309d89 | 680 | int err; |
b8a28251 | 681 | |
466a7b9e SM |
682 | cryptd_check_internal(tb, &type, &mask); |
683 | ||
684 | salg = shash_attr_alg(tb[1], type, mask); | |
46309d89 | 685 | if (IS_ERR(salg)) |
9cd899a3 | 686 | return PTR_ERR(salg); |
b8a28251 | 687 | |
46309d89 | 688 | alg = &salg->base; |
0b535adf HX |
689 | inst = cryptd_alloc_instance(alg, ahash_instance_headroom(), |
690 | sizeof(*ctx)); | |
05ed8758 | 691 | err = PTR_ERR(inst); |
b8a28251 LH |
692 | if (IS_ERR(inst)) |
693 | goto out_put_alg; | |
694 | ||
0b535adf | 695 | ctx = ahash_instance_ctx(inst); |
46309d89 HX |
696 | ctx->queue = queue; |
697 | ||
0b535adf HX |
698 | err = crypto_init_shash_spawn(&ctx->spawn, salg, |
699 | ahash_crypto_instance(inst)); | |
46309d89 HX |
700 | if (err) |
701 | goto out_free_inst; | |
702 | ||
a208fa8f EB |
703 | inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC | |
704 | (alg->cra_flags & (CRYPTO_ALG_INTERNAL | | |
705 | CRYPTO_ALG_OPTIONAL_KEY)); | |
b8a28251 | 706 | |
0b535adf | 707 | inst->alg.halg.digestsize = salg->digestsize; |
1a078340 | 708 | inst->alg.halg.statesize = salg->statesize; |
0b535adf | 709 | inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx); |
b8a28251 | 710 | |
0b535adf HX |
711 | inst->alg.halg.base.cra_init = cryptd_hash_init_tfm; |
712 | inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm; | |
b8a28251 | 713 | |
0b535adf HX |
714 | inst->alg.init = cryptd_hash_init_enqueue; |
715 | inst->alg.update = cryptd_hash_update_enqueue; | |
716 | inst->alg.final = cryptd_hash_final_enqueue; | |
6fba00d1 HX |
717 | inst->alg.finup = cryptd_hash_finup_enqueue; |
718 | inst->alg.export = cryptd_hash_export; | |
719 | inst->alg.import = cryptd_hash_import; | |
841a3ff3 EB |
720 | if (crypto_shash_alg_has_setkey(salg)) |
721 | inst->alg.setkey = cryptd_hash_setkey; | |
0b535adf | 722 | inst->alg.digest = cryptd_hash_digest_enqueue; |
b8a28251 | 723 | |
0b535adf | 724 | err = ahash_register_instance(tmpl, inst); |
9cd899a3 HX |
725 | if (err) { |
726 | crypto_drop_shash(&ctx->spawn); | |
727 | out_free_inst: | |
728 | kfree(inst); | |
729 | } | |
730 | ||
b8a28251 LH |
731 | out_put_alg: |
732 | crypto_mod_put(alg); | |
9cd899a3 | 733 | return err; |
b8a28251 LH |
734 | } |
735 | ||
92b9876b HX |
736 | static int cryptd_aead_setkey(struct crypto_aead *parent, |
737 | const u8 *key, unsigned int keylen) | |
738 | { | |
739 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); | |
740 | struct crypto_aead *child = ctx->child; | |
741 | ||
742 | return crypto_aead_setkey(child, key, keylen); | |
743 | } | |
744 | ||
745 | static int cryptd_aead_setauthsize(struct crypto_aead *parent, | |
746 | unsigned int authsize) | |
747 | { | |
748 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(parent); | |
749 | struct crypto_aead *child = ctx->child; | |
750 | ||
751 | return crypto_aead_setauthsize(child, authsize); | |
752 | } | |
753 | ||
298c926c AH |
754 | static void cryptd_aead_crypt(struct aead_request *req, |
755 | struct crypto_aead *child, | |
756 | int err, | |
757 | int (*crypt)(struct aead_request *req)) | |
758 | { | |
759 | struct cryptd_aead_request_ctx *rctx; | |
81760ea6 | 760 | struct cryptd_aead_ctx *ctx; |
ec9f2006 | 761 | crypto_completion_t compl; |
81760ea6 HX |
762 | struct crypto_aead *tfm; |
763 | int refcnt; | |
ec9f2006 | 764 | |
298c926c | 765 | rctx = aead_request_ctx(req); |
ec9f2006 | 766 | compl = rctx->complete; |
298c926c | 767 | |
31bd44e7 HX |
768 | tfm = crypto_aead_reqtfm(req); |
769 | ||
298c926c AH |
770 | if (unlikely(err == -EINPROGRESS)) |
771 | goto out; | |
772 | aead_request_set_tfm(req, child); | |
773 | err = crypt( req ); | |
81760ea6 | 774 | |
298c926c | 775 | out: |
81760ea6 HX |
776 | ctx = crypto_aead_ctx(tfm); |
777 | refcnt = atomic_read(&ctx->refcnt); | |
778 | ||
298c926c | 779 | local_bh_disable(); |
ec9f2006 | 780 | compl(&req->base, err); |
298c926c | 781 | local_bh_enable(); |
81760ea6 HX |
782 | |
783 | if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt)) | |
784 | crypto_free_aead(tfm); | |
298c926c AH |
785 | } |
786 | ||
787 | static void cryptd_aead_encrypt(struct crypto_async_request *areq, int err) | |
788 | { | |
789 | struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm); | |
790 | struct crypto_aead *child = ctx->child; | |
791 | struct aead_request *req; | |
792 | ||
793 | req = container_of(areq, struct aead_request, base); | |
ba3749a7 | 794 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt); |
298c926c AH |
795 | } |
796 | ||
797 | static void cryptd_aead_decrypt(struct crypto_async_request *areq, int err) | |
798 | { | |
799 | struct cryptd_aead_ctx *ctx = crypto_tfm_ctx(areq->tfm); | |
800 | struct crypto_aead *child = ctx->child; | |
801 | struct aead_request *req; | |
802 | ||
803 | req = container_of(areq, struct aead_request, base); | |
ba3749a7 | 804 | cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt); |
298c926c AH |
805 | } |
806 | ||
807 | static int cryptd_aead_enqueue(struct aead_request *req, | |
3e3dc25f | 808 | crypto_completion_t compl) |
298c926c AH |
809 | { |
810 | struct cryptd_aead_request_ctx *rctx = aead_request_ctx(req); | |
811 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
812 | struct cryptd_queue *queue = cryptd_get_queue(crypto_aead_tfm(tfm)); | |
813 | ||
814 | rctx->complete = req->base.complete; | |
3e3dc25f | 815 | req->base.complete = compl; |
298c926c AH |
816 | return cryptd_enqueue_request(queue, &req->base); |
817 | } | |
818 | ||
819 | static int cryptd_aead_encrypt_enqueue(struct aead_request *req) | |
820 | { | |
821 | return cryptd_aead_enqueue(req, cryptd_aead_encrypt ); | |
822 | } | |
823 | ||
824 | static int cryptd_aead_decrypt_enqueue(struct aead_request *req) | |
825 | { | |
826 | return cryptd_aead_enqueue(req, cryptd_aead_decrypt ); | |
827 | } | |
828 | ||
f614e546 | 829 | static int cryptd_aead_init_tfm(struct crypto_aead *tfm) |
298c926c | 830 | { |
f614e546 HX |
831 | struct aead_instance *inst = aead_alg_instance(tfm); |
832 | struct aead_instance_ctx *ictx = aead_instance_ctx(inst); | |
298c926c | 833 | struct crypto_aead_spawn *spawn = &ictx->aead_spawn; |
f614e546 | 834 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c AH |
835 | struct crypto_aead *cipher; |
836 | ||
837 | cipher = crypto_spawn_aead(spawn); | |
838 | if (IS_ERR(cipher)) | |
839 | return PTR_ERR(cipher); | |
840 | ||
298c926c | 841 | ctx->child = cipher; |
ec9f2006 HX |
842 | crypto_aead_set_reqsize( |
843 | tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx), | |
844 | crypto_aead_reqsize(cipher))); | |
298c926c AH |
845 | return 0; |
846 | } | |
847 | ||
f614e546 | 848 | static void cryptd_aead_exit_tfm(struct crypto_aead *tfm) |
298c926c | 849 | { |
f614e546 | 850 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm); |
298c926c AH |
851 | crypto_free_aead(ctx->child); |
852 | } | |
853 | ||
854 | static int cryptd_create_aead(struct crypto_template *tmpl, | |
855 | struct rtattr **tb, | |
856 | struct cryptd_queue *queue) | |
857 | { | |
858 | struct aead_instance_ctx *ctx; | |
f614e546 HX |
859 | struct aead_instance *inst; |
860 | struct aead_alg *alg; | |
9b8c456e HX |
861 | const char *name; |
862 | u32 type = 0; | |
ec9f2006 | 863 | u32 mask = CRYPTO_ALG_ASYNC; |
298c926c AH |
864 | int err; |
865 | ||
466a7b9e SM |
866 | cryptd_check_internal(tb, &type, &mask); |
867 | ||
9b8c456e HX |
868 | name = crypto_attr_alg_name(tb[1]); |
869 | if (IS_ERR(name)) | |
870 | return PTR_ERR(name); | |
298c926c | 871 | |
9b8c456e HX |
872 | inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); |
873 | if (!inst) | |
874 | return -ENOMEM; | |
298c926c | 875 | |
f614e546 | 876 | ctx = aead_instance_ctx(inst); |
298c926c AH |
877 | ctx->queue = queue; |
878 | ||
f614e546 | 879 | crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst)); |
9b8c456e | 880 | err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask); |
298c926c AH |
881 | if (err) |
882 | goto out_free_inst; | |
883 | ||
f614e546 HX |
884 | alg = crypto_spawn_aead_alg(&ctx->aead_spawn); |
885 | err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base); | |
9b8c456e HX |
886 | if (err) |
887 | goto out_drop_aead; | |
888 | ||
f614e546 | 889 | inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC | |
5e4b8c1f | 890 | (alg->base.cra_flags & CRYPTO_ALG_INTERNAL); |
f614e546 | 891 | inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx); |
298c926c | 892 | |
f614e546 HX |
893 | inst->alg.ivsize = crypto_aead_alg_ivsize(alg); |
894 | inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); | |
895 | ||
896 | inst->alg.init = cryptd_aead_init_tfm; | |
897 | inst->alg.exit = cryptd_aead_exit_tfm; | |
898 | inst->alg.setkey = cryptd_aead_setkey; | |
899 | inst->alg.setauthsize = cryptd_aead_setauthsize; | |
900 | inst->alg.encrypt = cryptd_aead_encrypt_enqueue; | |
901 | inst->alg.decrypt = cryptd_aead_decrypt_enqueue; | |
902 | ||
903 | err = aead_register_instance(tmpl, inst); | |
298c926c | 904 | if (err) { |
9b8c456e HX |
905 | out_drop_aead: |
906 | crypto_drop_aead(&ctx->aead_spawn); | |
298c926c AH |
907 | out_free_inst: |
908 | kfree(inst); | |
909 | } | |
298c926c AH |
910 | return err; |
911 | } | |
912 | ||
254eff77 | 913 | static struct cryptd_queue queue; |
124b53d0 | 914 | |
9cd899a3 | 915 | static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb) |
124b53d0 HX |
916 | { |
917 | struct crypto_attr_type *algt; | |
918 | ||
919 | algt = crypto_get_attr_type(tb); | |
920 | if (IS_ERR(algt)) | |
9cd899a3 | 921 | return PTR_ERR(algt); |
124b53d0 HX |
922 | |
923 | switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { | |
924 | case CRYPTO_ALG_TYPE_BLKCIPHER: | |
4e0958d1 | 925 | return cryptd_create_skcipher(tmpl, tb, &queue); |
b8a28251 | 926 | case CRYPTO_ALG_TYPE_DIGEST: |
9cd899a3 | 927 | return cryptd_create_hash(tmpl, tb, &queue); |
298c926c AH |
928 | case CRYPTO_ALG_TYPE_AEAD: |
929 | return cryptd_create_aead(tmpl, tb, &queue); | |
124b53d0 HX |
930 | } |
931 | ||
9cd899a3 | 932 | return -EINVAL; |
124b53d0 HX |
933 | } |
934 | ||
935 | static void cryptd_free(struct crypto_instance *inst) | |
936 | { | |
937 | struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst); | |
0b535adf | 938 | struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst); |
298c926c | 939 | struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst); |
0b535adf HX |
940 | |
941 | switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) { | |
942 | case CRYPTO_ALG_TYPE_AHASH: | |
943 | crypto_drop_shash(&hctx->spawn); | |
944 | kfree(ahash_instance(inst)); | |
945 | return; | |
298c926c | 946 | case CRYPTO_ALG_TYPE_AEAD: |
f614e546 HX |
947 | crypto_drop_aead(&aead_ctx->aead_spawn); |
948 | kfree(aead_instance(inst)); | |
298c926c AH |
949 | return; |
950 | default: | |
951 | crypto_drop_spawn(&ctx->spawn); | |
952 | kfree(inst); | |
0b535adf | 953 | } |
124b53d0 HX |
954 | } |
955 | ||
956 | static struct crypto_template cryptd_tmpl = { | |
957 | .name = "cryptd", | |
9cd899a3 | 958 | .create = cryptd_create, |
124b53d0 HX |
959 | .free = cryptd_free, |
960 | .module = THIS_MODULE, | |
961 | }; | |
962 | ||
4e0958d1 HX |
963 | struct cryptd_skcipher *cryptd_alloc_skcipher(const char *alg_name, |
964 | u32 type, u32 mask) | |
965 | { | |
966 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
967 | struct cryptd_skcipher_ctx *ctx; | |
968 | struct crypto_skcipher *tfm; | |
969 | ||
970 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
971 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
972 | return ERR_PTR(-EINVAL); | |
973 | ||
974 | tfm = crypto_alloc_skcipher(cryptd_alg_name, type, mask); | |
975 | if (IS_ERR(tfm)) | |
976 | return ERR_CAST(tfm); | |
977 | ||
978 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
979 | crypto_free_skcipher(tfm); | |
980 | return ERR_PTR(-EINVAL); | |
981 | } | |
982 | ||
983 | ctx = crypto_skcipher_ctx(tfm); | |
984 | atomic_set(&ctx->refcnt, 1); | |
985 | ||
986 | return container_of(tfm, struct cryptd_skcipher, base); | |
987 | } | |
988 | EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher); | |
989 | ||
990 | struct crypto_skcipher *cryptd_skcipher_child(struct cryptd_skcipher *tfm) | |
991 | { | |
992 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
993 | ||
36b3875a | 994 | return &ctx->child->base; |
4e0958d1 HX |
995 | } |
996 | EXPORT_SYMBOL_GPL(cryptd_skcipher_child); | |
997 | ||
998 | bool cryptd_skcipher_queued(struct cryptd_skcipher *tfm) | |
999 | { | |
1000 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
1001 | ||
1002 | return atomic_read(&ctx->refcnt) - 1; | |
1003 | } | |
1004 | EXPORT_SYMBOL_GPL(cryptd_skcipher_queued); | |
1005 | ||
1006 | void cryptd_free_skcipher(struct cryptd_skcipher *tfm) | |
1007 | { | |
1008 | struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(&tfm->base); | |
1009 | ||
1010 | if (atomic_dec_and_test(&ctx->refcnt)) | |
1011 | crypto_free_skcipher(&tfm->base); | |
1012 | } | |
1013 | EXPORT_SYMBOL_GPL(cryptd_free_skcipher); | |
1014 | ||
ace13663 HY |
1015 | struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name, |
1016 | u32 type, u32 mask) | |
1017 | { | |
1018 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
81760ea6 | 1019 | struct cryptd_hash_ctx *ctx; |
ace13663 HY |
1020 | struct crypto_ahash *tfm; |
1021 | ||
1022 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
1023 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
1024 | return ERR_PTR(-EINVAL); | |
1025 | tfm = crypto_alloc_ahash(cryptd_alg_name, type, mask); | |
1026 | if (IS_ERR(tfm)) | |
1027 | return ERR_CAST(tfm); | |
1028 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
1029 | crypto_free_ahash(tfm); | |
1030 | return ERR_PTR(-EINVAL); | |
1031 | } | |
1032 | ||
81760ea6 HX |
1033 | ctx = crypto_ahash_ctx(tfm); |
1034 | atomic_set(&ctx->refcnt, 1); | |
1035 | ||
ace13663 HY |
1036 | return __cryptd_ahash_cast(tfm); |
1037 | } | |
1038 | EXPORT_SYMBOL_GPL(cryptd_alloc_ahash); | |
1039 | ||
1040 | struct crypto_shash *cryptd_ahash_child(struct cryptd_ahash *tfm) | |
1041 | { | |
1042 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
1043 | ||
1044 | return ctx->child; | |
1045 | } | |
1046 | EXPORT_SYMBOL_GPL(cryptd_ahash_child); | |
1047 | ||
0e1227d3 HY |
1048 | struct shash_desc *cryptd_shash_desc(struct ahash_request *req) |
1049 | { | |
1050 | struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req); | |
1051 | return &rctx->desc; | |
1052 | } | |
1053 | EXPORT_SYMBOL_GPL(cryptd_shash_desc); | |
1054 | ||
81760ea6 HX |
1055 | bool cryptd_ahash_queued(struct cryptd_ahash *tfm) |
1056 | { | |
1057 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); | |
1058 | ||
1059 | return atomic_read(&ctx->refcnt) - 1; | |
1060 | } | |
1061 | EXPORT_SYMBOL_GPL(cryptd_ahash_queued); | |
1062 | ||
ace13663 HY |
1063 | void cryptd_free_ahash(struct cryptd_ahash *tfm) |
1064 | { | |
81760ea6 HX |
1065 | struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(&tfm->base); |
1066 | ||
1067 | if (atomic_dec_and_test(&ctx->refcnt)) | |
1068 | crypto_free_ahash(&tfm->base); | |
ace13663 HY |
1069 | } |
1070 | EXPORT_SYMBOL_GPL(cryptd_free_ahash); | |
1071 | ||
298c926c AH |
1072 | struct cryptd_aead *cryptd_alloc_aead(const char *alg_name, |
1073 | u32 type, u32 mask) | |
1074 | { | |
1075 | char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; | |
81760ea6 | 1076 | struct cryptd_aead_ctx *ctx; |
298c926c AH |
1077 | struct crypto_aead *tfm; |
1078 | ||
1079 | if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, | |
1080 | "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) | |
1081 | return ERR_PTR(-EINVAL); | |
1082 | tfm = crypto_alloc_aead(cryptd_alg_name, type, mask); | |
1083 | if (IS_ERR(tfm)) | |
1084 | return ERR_CAST(tfm); | |
1085 | if (tfm->base.__crt_alg->cra_module != THIS_MODULE) { | |
1086 | crypto_free_aead(tfm); | |
1087 | return ERR_PTR(-EINVAL); | |
1088 | } | |
81760ea6 HX |
1089 | |
1090 | ctx = crypto_aead_ctx(tfm); | |
1091 | atomic_set(&ctx->refcnt, 1); | |
1092 | ||
298c926c AH |
1093 | return __cryptd_aead_cast(tfm); |
1094 | } | |
1095 | EXPORT_SYMBOL_GPL(cryptd_alloc_aead); | |
1096 | ||
1097 | struct crypto_aead *cryptd_aead_child(struct cryptd_aead *tfm) | |
1098 | { | |
1099 | struct cryptd_aead_ctx *ctx; | |
1100 | ctx = crypto_aead_ctx(&tfm->base); | |
1101 | return ctx->child; | |
1102 | } | |
1103 | EXPORT_SYMBOL_GPL(cryptd_aead_child); | |
1104 | ||
81760ea6 HX |
1105 | bool cryptd_aead_queued(struct cryptd_aead *tfm) |
1106 | { | |
1107 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); | |
1108 | ||
1109 | return atomic_read(&ctx->refcnt) - 1; | |
1110 | } | |
1111 | EXPORT_SYMBOL_GPL(cryptd_aead_queued); | |
1112 | ||
298c926c AH |
1113 | void cryptd_free_aead(struct cryptd_aead *tfm) |
1114 | { | |
81760ea6 HX |
1115 | struct cryptd_aead_ctx *ctx = crypto_aead_ctx(&tfm->base); |
1116 | ||
1117 | if (atomic_dec_and_test(&ctx->refcnt)) | |
1118 | crypto_free_aead(&tfm->base); | |
298c926c AH |
1119 | } |
1120 | EXPORT_SYMBOL_GPL(cryptd_free_aead); | |
1121 | ||
124b53d0 HX |
1122 | static int __init cryptd_init(void) |
1123 | { | |
1124 | int err; | |
1125 | ||
c3a53605 | 1126 | err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen); |
124b53d0 HX |
1127 | if (err) |
1128 | return err; | |
1129 | ||
1130 | err = crypto_register_template(&cryptd_tmpl); | |
1131 | if (err) | |
254eff77 | 1132 | cryptd_fini_queue(&queue); |
124b53d0 HX |
1133 | |
1134 | return err; | |
1135 | } | |
1136 | ||
1137 | static void __exit cryptd_exit(void) | |
1138 | { | |
254eff77 | 1139 | cryptd_fini_queue(&queue); |
124b53d0 HX |
1140 | crypto_unregister_template(&cryptd_tmpl); |
1141 | } | |
1142 | ||
b2bac6ac | 1143 | subsys_initcall(cryptd_init); |
124b53d0 HX |
1144 | module_exit(cryptd_exit); |
1145 | ||
1146 | MODULE_LICENSE("GPL"); | |
1147 | MODULE_DESCRIPTION("Software async crypto daemon"); | |
4943ba16 | 1148 | MODULE_ALIAS_CRYPTO("cryptd"); |