blob: addca7bae33f40e9111fc855a5851537373a03f9 [file] [log] [blame]
Herbert Xu124b53d2007-04-16 20:49:20 +10001/*
2 * Software async crypto daemon.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
Adrian Hoban298c9262010-09-20 16:05:12 +08006 * 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 *
Herbert Xu124b53d2007-04-16 20:49:20 +100013 * 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
Herbert Xu18e33e62008-07-10 16:01:22 +080020#include <crypto/internal/hash.h>
Adrian Hoban298c9262010-09-20 16:05:12 +080021#include <crypto/internal/aead.h>
Herbert Xu4e0958d2016-11-22 20:08:23 +080022#include <crypto/internal/skcipher.h>
Huang Ying1cac2cb2009-01-18 16:19:46 +110023#include <crypto/cryptd.h>
Huang Ying254eff72009-02-19 14:42:19 +080024#include <crypto/crypto_wq.h>
Herbert Xu81760ea2016-06-21 16:55:13 +080025#include <linux/atomic.h>
Herbert Xu124b53d2007-04-16 20:49:20 +100026#include <linux/err.h>
27#include <linux/init.h>
28#include <linux/kernel.h>
Herbert Xu124b53d2007-04-16 20:49:20 +100029#include <linux/list.h>
30#include <linux/module.h>
Herbert Xu124b53d2007-04-16 20:49:20 +100031#include <linux/scatterlist.h>
32#include <linux/sched.h>
33#include <linux/slab.h>
Herbert Xu124b53d2007-04-16 20:49:20 +100034
Colin Ian Kingeaf356e2017-11-30 11:26:14 +000035static unsigned int cryptd_max_cpu_qlen = 1000;
Jon Maxwellc3a53602017-11-22 16:08:17 +110036module_param(cryptd_max_cpu_qlen, uint, 0);
37MODULE_PARM_DESC(cryptd_max_cpu_qlen, "Set cryptd Max queue depth");
Herbert Xu124b53d2007-04-16 20:49:20 +100038
Huang Ying254eff72009-02-19 14:42:19 +080039struct cryptd_cpu_queue {
Herbert Xu124b53d2007-04-16 20:49:20 +100040 struct crypto_queue queue;
Huang Ying254eff72009-02-19 14:42:19 +080041 struct work_struct work;
42};
43
44struct cryptd_queue {
Tejun Heoa29d8b82010-02-02 14:39:15 +090045 struct cryptd_cpu_queue __percpu *cpu_queue;
Herbert Xu124b53d2007-04-16 20:49:20 +100046};
47
48struct cryptd_instance_ctx {
49 struct crypto_spawn spawn;
Huang Ying254eff72009-02-19 14:42:19 +080050 struct cryptd_queue *queue;
Herbert Xu124b53d2007-04-16 20:49:20 +100051};
52
Herbert Xu4e0958d2016-11-22 20:08:23 +080053struct skcipherd_instance_ctx {
54 struct crypto_skcipher_spawn spawn;
55 struct cryptd_queue *queue;
56};
57
Herbert Xu46309d82009-07-12 21:38:59 +080058struct hashd_instance_ctx {
59 struct crypto_shash_spawn spawn;
60 struct cryptd_queue *queue;
61};
62
Adrian Hoban298c9262010-09-20 16:05:12 +080063struct aead_instance_ctx {
64 struct crypto_aead_spawn aead_spawn;
65 struct cryptd_queue *queue;
66};
67
Herbert Xu124b53d2007-04-16 20:49:20 +100068struct cryptd_blkcipher_ctx {
Herbert Xu81760ea2016-06-21 16:55:13 +080069 atomic_t refcnt;
Herbert Xu124b53d2007-04-16 20:49:20 +100070 struct crypto_blkcipher *child;
71};
72
73struct cryptd_blkcipher_request_ctx {
74 crypto_completion_t complete;
75};
76
Herbert Xu4e0958d2016-11-22 20:08:23 +080077struct cryptd_skcipher_ctx {
78 atomic_t refcnt;
79 struct crypto_skcipher *child;
80};
81
82struct cryptd_skcipher_request_ctx {
83 crypto_completion_t complete;
84};
85
Loc Hob8a28252008-05-14 21:23:00 +080086struct cryptd_hash_ctx {
Herbert Xu81760ea2016-06-21 16:55:13 +080087 atomic_t refcnt;
Herbert Xu46309d82009-07-12 21:38:59 +080088 struct crypto_shash *child;
Loc Hob8a28252008-05-14 21:23:00 +080089};
90
91struct cryptd_hash_request_ctx {
92 crypto_completion_t complete;
Herbert Xu46309d82009-07-12 21:38:59 +080093 struct shash_desc desc;
Loc Hob8a28252008-05-14 21:23:00 +080094};
Herbert Xu124b53d2007-04-16 20:49:20 +100095
Adrian Hoban298c9262010-09-20 16:05:12 +080096struct cryptd_aead_ctx {
Herbert Xu81760ea2016-06-21 16:55:13 +080097 atomic_t refcnt;
Adrian Hoban298c9262010-09-20 16:05:12 +080098 struct crypto_aead *child;
99};
100
101struct cryptd_aead_request_ctx {
102 crypto_completion_t complete;
103};
104
Huang Ying254eff72009-02-19 14:42:19 +0800105static void cryptd_queue_worker(struct work_struct *work);
106
107static int cryptd_init_queue(struct cryptd_queue *queue,
108 unsigned int max_cpu_qlen)
109{
110 int cpu;
111 struct cryptd_cpu_queue *cpu_queue;
112
113 queue->cpu_queue = alloc_percpu(struct cryptd_cpu_queue);
114 if (!queue->cpu_queue)
115 return -ENOMEM;
116 for_each_possible_cpu(cpu) {
117 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
118 crypto_init_queue(&cpu_queue->queue, max_cpu_qlen);
119 INIT_WORK(&cpu_queue->work, cryptd_queue_worker);
120 }
Jon Maxwellc3a53602017-11-22 16:08:17 +1100121 pr_info("cryptd: max_cpu_qlen set to %d\n", max_cpu_qlen);
Huang Ying254eff72009-02-19 14:42:19 +0800122 return 0;
123}
124
125static void cryptd_fini_queue(struct cryptd_queue *queue)
126{
127 int cpu;
128 struct cryptd_cpu_queue *cpu_queue;
129
130 for_each_possible_cpu(cpu) {
131 cpu_queue = per_cpu_ptr(queue->cpu_queue, cpu);
132 BUG_ON(cpu_queue->queue.qlen);
133 }
134 free_percpu(queue->cpu_queue);
135}
136
137static int cryptd_enqueue_request(struct cryptd_queue *queue,
138 struct crypto_async_request *request)
139{
140 int cpu, err;
141 struct cryptd_cpu_queue *cpu_queue;
Herbert Xu81760ea2016-06-21 16:55:13 +0800142 atomic_t *refcnt;
Huang Ying254eff72009-02-19 14:42:19 +0800143
144 cpu = get_cpu();
Christoph Lameter0b44f482009-10-03 19:48:23 +0900145 cpu_queue = this_cpu_ptr(queue->cpu_queue);
Huang Ying254eff72009-02-19 14:42:19 +0800146 err = crypto_enqueue_request(&cpu_queue->queue, request);
Herbert Xu81760ea2016-06-21 16:55:13 +0800147
148 refcnt = crypto_tfm_ctx(request->tfm);
Herbert Xu81760ea2016-06-21 16:55:13 +0800149
Gilad Ben-Yossef6b80ea32017-10-18 08:00:33 +0100150 if (err == -ENOSPC)
Herbert Xu81760ea2016-06-21 16:55:13 +0800151 goto out_put_cpu;
152
Huang Ying254eff72009-02-19 14:42:19 +0800153 queue_work_on(cpu, kcrypto_wq, &cpu_queue->work);
Herbert Xu81760ea2016-06-21 16:55:13 +0800154
155 if (!atomic_read(refcnt))
156 goto out_put_cpu;
157
Herbert Xu81760ea2016-06-21 16:55:13 +0800158 atomic_inc(refcnt);
159
160out_put_cpu:
Huang Ying254eff72009-02-19 14:42:19 +0800161 put_cpu();
162
163 return err;
164}
165
166/* Called in workqueue context, do one real cryption work (via
167 * req->complete) and reschedule itself if there are more work to
168 * do. */
169static void cryptd_queue_worker(struct work_struct *work)
170{
171 struct cryptd_cpu_queue *cpu_queue;
172 struct crypto_async_request *req, *backlog;
173
174 cpu_queue = container_of(work, struct cryptd_cpu_queue, work);
Jussi Kivilinna9efade12012-10-21 20:42:28 +0300175 /*
176 * Only handle one request at a time to avoid hogging crypto workqueue.
177 * preempt_disable/enable is used to prevent being preempted by
178 * cryptd_enqueue_request(). local_bh_disable/enable is used to prevent
179 * cryptd_enqueue_request() being accessed from software interrupts.
180 */
181 local_bh_disable();
Huang Ying254eff72009-02-19 14:42:19 +0800182 preempt_disable();
183 backlog = crypto_get_backlog(&cpu_queue->queue);
184 req = crypto_dequeue_request(&cpu_queue->queue);
185 preempt_enable();
Jussi Kivilinna9efade12012-10-21 20:42:28 +0300186 local_bh_enable();
Huang Ying254eff72009-02-19 14:42:19 +0800187
188 if (!req)
189 return;
190
191 if (backlog)
192 backlog->complete(backlog, -EINPROGRESS);
193 req->complete(req, 0);
194
195 if (cpu_queue->queue.qlen)
196 queue_work(kcrypto_wq, &cpu_queue->work);
197}
198
199static inline struct cryptd_queue *cryptd_get_queue(struct crypto_tfm *tfm)
Herbert Xu124b53d2007-04-16 20:49:20 +1000200{
201 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
202 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
Huang Ying254eff72009-02-19 14:42:19 +0800203 return ictx->queue;
Herbert Xu124b53d2007-04-16 20:49:20 +1000204}
205
Stephan Mueller466a7b92015-03-30 21:57:06 +0200206static inline void cryptd_check_internal(struct rtattr **tb, u32 *type,
207 u32 *mask)
208{
209 struct crypto_attr_type *algt;
210
211 algt = crypto_get_attr_type(tb);
212 if (IS_ERR(algt))
213 return;
Herbert Xuf6da3202015-07-09 07:17:19 +0800214
Herbert Xu5e4b8c12015-08-13 17:29:06 +0800215 *type |= algt->type & CRYPTO_ALG_INTERNAL;
216 *mask |= algt->mask & CRYPTO_ALG_INTERNAL;
Stephan Mueller466a7b92015-03-30 21:57:06 +0200217}
218
Herbert Xu124b53d2007-04-16 20:49:20 +1000219static int cryptd_blkcipher_setkey(struct crypto_ablkcipher *parent,
220 const u8 *key, unsigned int keylen)
221{
222 struct cryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent);
223 struct crypto_blkcipher *child = ctx->child;
224 int err;
225
226 crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
227 crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) &
228 CRYPTO_TFM_REQ_MASK);
229 err = crypto_blkcipher_setkey(child, key, keylen);
230 crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) &
231 CRYPTO_TFM_RES_MASK);
232 return err;
233}
234
235static void cryptd_blkcipher_crypt(struct ablkcipher_request *req,
236 struct crypto_blkcipher *child,
237 int err,
238 int (*crypt)(struct blkcipher_desc *desc,
239 struct scatterlist *dst,
240 struct scatterlist *src,
241 unsigned int len))
242{
243 struct cryptd_blkcipher_request_ctx *rctx;
Herbert Xu81760ea2016-06-21 16:55:13 +0800244 struct cryptd_blkcipher_ctx *ctx;
245 struct crypto_ablkcipher *tfm;
Herbert Xu124b53d2007-04-16 20:49:20 +1000246 struct blkcipher_desc desc;
Herbert Xu81760ea2016-06-21 16:55:13 +0800247 int refcnt;
Herbert Xu124b53d2007-04-16 20:49:20 +1000248
249 rctx = ablkcipher_request_ctx(req);
250
Herbert Xu93aa7f82008-05-07 21:10:13 +0800251 if (unlikely(err == -EINPROGRESS))
252 goto out;
Herbert Xu124b53d2007-04-16 20:49:20 +1000253
254 desc.tfm = child;
255 desc.info = req->info;
256 desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
257
258 err = crypt(&desc, req->dst, req->src, req->nbytes);
259
260 req->base.complete = rctx->complete;
261
Herbert Xu93aa7f82008-05-07 21:10:13 +0800262out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800263 tfm = crypto_ablkcipher_reqtfm(req);
264 ctx = crypto_ablkcipher_ctx(tfm);
265 refcnt = atomic_read(&ctx->refcnt);
266
Herbert Xu124b53d2007-04-16 20:49:20 +1000267 local_bh_disable();
Herbert Xu93aa7f82008-05-07 21:10:13 +0800268 rctx->complete(&req->base, err);
Herbert Xu124b53d2007-04-16 20:49:20 +1000269 local_bh_enable();
Herbert Xu81760ea2016-06-21 16:55:13 +0800270
271 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
272 crypto_free_ablkcipher(tfm);
Herbert Xu124b53d2007-04-16 20:49:20 +1000273}
274
275static void cryptd_blkcipher_encrypt(struct crypto_async_request *req, int err)
276{
277 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
278 struct crypto_blkcipher *child = ctx->child;
279
280 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
281 crypto_blkcipher_crt(child)->encrypt);
282}
283
284static void cryptd_blkcipher_decrypt(struct crypto_async_request *req, int err)
285{
286 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm);
287 struct crypto_blkcipher *child = ctx->child;
288
289 cryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err,
290 crypto_blkcipher_crt(child)->decrypt);
291}
292
293static int cryptd_blkcipher_enqueue(struct ablkcipher_request *req,
Mark Rustad3e3dc252014-07-25 02:53:38 -0700294 crypto_completion_t compl)
Herbert Xu124b53d2007-04-16 20:49:20 +1000295{
296 struct cryptd_blkcipher_request_ctx *rctx = ablkcipher_request_ctx(req);
297 struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
Huang Ying254eff72009-02-19 14:42:19 +0800298 struct cryptd_queue *queue;
Herbert Xu124b53d2007-04-16 20:49:20 +1000299
Huang Ying254eff72009-02-19 14:42:19 +0800300 queue = cryptd_get_queue(crypto_ablkcipher_tfm(tfm));
Herbert Xu124b53d2007-04-16 20:49:20 +1000301 rctx->complete = req->base.complete;
Mark Rustad3e3dc252014-07-25 02:53:38 -0700302 req->base.complete = compl;
Herbert Xu124b53d2007-04-16 20:49:20 +1000303
Huang Ying254eff72009-02-19 14:42:19 +0800304 return cryptd_enqueue_request(queue, &req->base);
Herbert Xu124b53d2007-04-16 20:49:20 +1000305}
306
307static int cryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req)
308{
309 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_encrypt);
310}
311
312static int cryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req)
313{
314 return cryptd_blkcipher_enqueue(req, cryptd_blkcipher_decrypt);
315}
316
317static int cryptd_blkcipher_init_tfm(struct crypto_tfm *tfm)
318{
319 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
320 struct cryptd_instance_ctx *ictx = crypto_instance_ctx(inst);
321 struct crypto_spawn *spawn = &ictx->spawn;
322 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
323 struct crypto_blkcipher *cipher;
324
325 cipher = crypto_spawn_blkcipher(spawn);
326 if (IS_ERR(cipher))
327 return PTR_ERR(cipher);
328
329 ctx->child = cipher;
330 tfm->crt_ablkcipher.reqsize =
331 sizeof(struct cryptd_blkcipher_request_ctx);
332 return 0;
333}
334
335static void cryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm)
336{
337 struct cryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm);
Herbert Xu124b53d2007-04-16 20:49:20 +1000338
339 crypto_free_blkcipher(ctx->child);
340}
341
Herbert Xu9b8c4562015-05-21 15:10:57 +0800342static int cryptd_init_instance(struct crypto_instance *inst,
343 struct crypto_alg *alg)
344{
345 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
346 "cryptd(%s)",
347 alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
348 return -ENAMETOOLONG;
349
350 memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
351
352 inst->alg.cra_priority = alg->cra_priority + 50;
353 inst->alg.cra_blocksize = alg->cra_blocksize;
354 inst->alg.cra_alignmask = alg->cra_alignmask;
355
356 return 0;
357}
358
Herbert Xu0b535ad2009-07-14 19:11:32 +0800359static void *cryptd_alloc_instance(struct crypto_alg *alg, unsigned int head,
360 unsigned int tail)
Herbert Xu124b53d2007-04-16 20:49:20 +1000361{
Herbert Xu0b535ad2009-07-14 19:11:32 +0800362 char *p;
Herbert Xu124b53d2007-04-16 20:49:20 +1000363 struct crypto_instance *inst;
Herbert Xu124b53d2007-04-16 20:49:20 +1000364 int err;
365
Herbert Xu0b535ad2009-07-14 19:11:32 +0800366 p = kzalloc(head + sizeof(*inst) + tail, GFP_KERNEL);
367 if (!p)
368 return ERR_PTR(-ENOMEM);
369
370 inst = (void *)(p + head);
Herbert Xu124b53d2007-04-16 20:49:20 +1000371
Herbert Xu9b8c4562015-05-21 15:10:57 +0800372 err = cryptd_init_instance(inst, alg);
373 if (err)
Herbert Xu124b53d2007-04-16 20:49:20 +1000374 goto out_free_inst;
375
Herbert Xu124b53d2007-04-16 20:49:20 +1000376out:
Herbert Xu0b535ad2009-07-14 19:11:32 +0800377 return p;
Herbert Xu124b53d2007-04-16 20:49:20 +1000378
379out_free_inst:
Herbert Xu0b535ad2009-07-14 19:11:32 +0800380 kfree(p);
381 p = ERR_PTR(err);
Herbert Xu124b53d2007-04-16 20:49:20 +1000382 goto out;
383}
384
Herbert Xu9cd899a2009-07-14 18:45:45 +0800385static int cryptd_create_blkcipher(struct crypto_template *tmpl,
386 struct rtattr **tb,
387 struct cryptd_queue *queue)
Herbert Xu124b53d2007-04-16 20:49:20 +1000388{
Herbert Xu46309d82009-07-12 21:38:59 +0800389 struct cryptd_instance_ctx *ctx;
Herbert Xu124b53d2007-04-16 20:49:20 +1000390 struct crypto_instance *inst;
391 struct crypto_alg *alg;
Stephan Mueller466a7b92015-03-30 21:57:06 +0200392 u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
393 u32 mask = CRYPTO_ALG_TYPE_MASK;
Herbert Xu46309d82009-07-12 21:38:59 +0800394 int err;
Herbert Xu124b53d2007-04-16 20:49:20 +1000395
Stephan Mueller466a7b92015-03-30 21:57:06 +0200396 cryptd_check_internal(tb, &type, &mask);
397
398 alg = crypto_get_attr_alg(tb, type, mask);
Herbert Xu124b53d2007-04-16 20:49:20 +1000399 if (IS_ERR(alg))
Herbert Xu9cd899a2009-07-14 18:45:45 +0800400 return PTR_ERR(alg);
Herbert Xu124b53d2007-04-16 20:49:20 +1000401
Herbert Xu0b535ad2009-07-14 19:11:32 +0800402 inst = cryptd_alloc_instance(alg, 0, sizeof(*ctx));
Steffen Klassert05ed8752009-07-15 16:51:04 +0800403 err = PTR_ERR(inst);
Herbert Xu124b53d2007-04-16 20:49:20 +1000404 if (IS_ERR(inst))
405 goto out_put_alg;
406
Herbert Xu46309d82009-07-12 21:38:59 +0800407 ctx = crypto_instance_ctx(inst);
408 ctx->queue = queue;
409
410 err = crypto_init_spawn(&ctx->spawn, alg, inst,
411 CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
412 if (err)
413 goto out_free_inst;
414
Stephan Mueller466a7b92015-03-30 21:57:06 +0200415 type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
416 if (alg->cra_flags & CRYPTO_ALG_INTERNAL)
417 type |= CRYPTO_ALG_INTERNAL;
418 inst->alg.cra_flags = type;
Herbert Xu124b53d2007-04-16 20:49:20 +1000419 inst->alg.cra_type = &crypto_ablkcipher_type;
420
421 inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize;
422 inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize;
423 inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize;
424
Herbert Xu927eead2007-11-27 21:15:31 +0800425 inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv;
426
Herbert Xu124b53d2007-04-16 20:49:20 +1000427 inst->alg.cra_ctxsize = sizeof(struct cryptd_blkcipher_ctx);
428
429 inst->alg.cra_init = cryptd_blkcipher_init_tfm;
430 inst->alg.cra_exit = cryptd_blkcipher_exit_tfm;
431
432 inst->alg.cra_ablkcipher.setkey = cryptd_blkcipher_setkey;
433 inst->alg.cra_ablkcipher.encrypt = cryptd_blkcipher_encrypt_enqueue;
434 inst->alg.cra_ablkcipher.decrypt = cryptd_blkcipher_decrypt_enqueue;
435
Herbert Xu9cd899a2009-07-14 18:45:45 +0800436 err = crypto_register_instance(tmpl, inst);
437 if (err) {
438 crypto_drop_spawn(&ctx->spawn);
439out_free_inst:
440 kfree(inst);
441 }
442
Herbert Xu124b53d2007-04-16 20:49:20 +1000443out_put_alg:
444 crypto_mod_put(alg);
Herbert Xu9cd899a2009-07-14 18:45:45 +0800445 return err;
Herbert Xu124b53d2007-04-16 20:49:20 +1000446}
447
Herbert Xu4e0958d2016-11-22 20:08:23 +0800448static int cryptd_skcipher_setkey(struct crypto_skcipher *parent,
449 const u8 *key, unsigned int keylen)
450{
451 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(parent);
452 struct crypto_skcipher *child = ctx->child;
453 int err;
454
455 crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
456 crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
457 CRYPTO_TFM_REQ_MASK);
458 err = crypto_skcipher_setkey(child, key, keylen);
459 crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) &
460 CRYPTO_TFM_RES_MASK);
461 return err;
462}
463
464static void cryptd_skcipher_complete(struct skcipher_request *req, int err)
465{
466 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
467 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
468 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
469 int refcnt = atomic_read(&ctx->refcnt);
470
471 local_bh_disable();
472 rctx->complete(&req->base, err);
473 local_bh_enable();
474
475 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
476 crypto_free_skcipher(tfm);
477}
478
479static void cryptd_skcipher_encrypt(struct crypto_async_request *base,
480 int err)
481{
482 struct skcipher_request *req = skcipher_request_cast(base);
483 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
484 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
485 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
486 struct crypto_skcipher *child = ctx->child;
487 SKCIPHER_REQUEST_ON_STACK(subreq, child);
488
489 if (unlikely(err == -EINPROGRESS))
490 goto out;
491
492 skcipher_request_set_tfm(subreq, child);
493 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
494 NULL, NULL);
495 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
496 req->iv);
497
498 err = crypto_skcipher_encrypt(subreq);
499 skcipher_request_zero(subreq);
500
501 req->base.complete = rctx->complete;
502
503out:
504 cryptd_skcipher_complete(req, err);
505}
506
507static void cryptd_skcipher_decrypt(struct crypto_async_request *base,
508 int err)
509{
510 struct skcipher_request *req = skcipher_request_cast(base);
511 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
512 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
513 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
514 struct crypto_skcipher *child = ctx->child;
515 SKCIPHER_REQUEST_ON_STACK(subreq, child);
516
517 if (unlikely(err == -EINPROGRESS))
518 goto out;
519
520 skcipher_request_set_tfm(subreq, child);
521 skcipher_request_set_callback(subreq, CRYPTO_TFM_REQ_MAY_SLEEP,
522 NULL, NULL);
523 skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
524 req->iv);
525
526 err = crypto_skcipher_decrypt(subreq);
527 skcipher_request_zero(subreq);
528
529 req->base.complete = rctx->complete;
530
531out:
532 cryptd_skcipher_complete(req, err);
533}
534
535static int cryptd_skcipher_enqueue(struct skcipher_request *req,
536 crypto_completion_t compl)
537{
538 struct cryptd_skcipher_request_ctx *rctx = skcipher_request_ctx(req);
539 struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
540 struct cryptd_queue *queue;
541
542 queue = cryptd_get_queue(crypto_skcipher_tfm(tfm));
543 rctx->complete = req->base.complete;
544 req->base.complete = compl;
545
546 return cryptd_enqueue_request(queue, &req->base);
547}
548
549static int cryptd_skcipher_encrypt_enqueue(struct skcipher_request *req)
550{
551 return cryptd_skcipher_enqueue(req, cryptd_skcipher_encrypt);
552}
553
554static int cryptd_skcipher_decrypt_enqueue(struct skcipher_request *req)
555{
556 return cryptd_skcipher_enqueue(req, cryptd_skcipher_decrypt);
557}
558
559static int cryptd_skcipher_init_tfm(struct crypto_skcipher *tfm)
560{
561 struct skcipher_instance *inst = skcipher_alg_instance(tfm);
562 struct skcipherd_instance_ctx *ictx = skcipher_instance_ctx(inst);
563 struct crypto_skcipher_spawn *spawn = &ictx->spawn;
564 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
565 struct crypto_skcipher *cipher;
566
567 cipher = crypto_spawn_skcipher(spawn);
568 if (IS_ERR(cipher))
569 return PTR_ERR(cipher);
570
571 ctx->child = cipher;
572 crypto_skcipher_set_reqsize(
573 tfm, sizeof(struct cryptd_skcipher_request_ctx));
574 return 0;
575}
576
577static void cryptd_skcipher_exit_tfm(struct crypto_skcipher *tfm)
578{
579 struct cryptd_skcipher_ctx *ctx = crypto_skcipher_ctx(tfm);
580
581 crypto_free_skcipher(ctx->child);
582}
583
584static void cryptd_skcipher_free(struct skcipher_instance *inst)
585{
586 struct skcipherd_instance_ctx *ctx = skcipher_instance_ctx(inst);
587
588 crypto_drop_skcipher(&ctx->spawn);
589}
590
591static 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) {
650out_drop_skcipher:
651 crypto_drop_skcipher(&ctx->spawn);
652out_free_inst:
653 kfree(inst);
654 }
655 return err;
656}
657
Loc Hob8a28252008-05-14 21:23:00 +0800658static int cryptd_hash_init_tfm(struct crypto_tfm *tfm)
659{
660 struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
Herbert Xu46309d82009-07-12 21:38:59 +0800661 struct hashd_instance_ctx *ictx = crypto_instance_ctx(inst);
662 struct crypto_shash_spawn *spawn = &ictx->spawn;
Loc Hob8a28252008-05-14 21:23:00 +0800663 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
Herbert Xu46309d82009-07-12 21:38:59 +0800664 struct crypto_shash *hash;
Loc Hob8a28252008-05-14 21:23:00 +0800665
Herbert Xu46309d82009-07-12 21:38:59 +0800666 hash = crypto_spawn_shash(spawn);
667 if (IS_ERR(hash))
668 return PTR_ERR(hash);
Loc Hob8a28252008-05-14 21:23:00 +0800669
Herbert Xu46309d82009-07-12 21:38:59 +0800670 ctx->child = hash;
Herbert Xu0d6669e2009-07-12 23:06:33 +0800671 crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
672 sizeof(struct cryptd_hash_request_ctx) +
673 crypto_shash_descsize(hash));
Loc Hob8a28252008-05-14 21:23:00 +0800674 return 0;
675}
676
677static void cryptd_hash_exit_tfm(struct crypto_tfm *tfm)
678{
679 struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(tfm);
Loc Hob8a28252008-05-14 21:23:00 +0800680
Herbert Xu46309d82009-07-12 21:38:59 +0800681 crypto_free_shash(ctx->child);
Loc Hob8a28252008-05-14 21:23:00 +0800682}
683
684static 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);
Herbert Xu46309d82009-07-12 21:38:59 +0800688 struct crypto_shash *child = ctx->child;
Loc Hob8a28252008-05-14 21:23:00 +0800689 int err;
690
Herbert Xu46309d82009-07-12 21:38:59 +0800691 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);
Loc Hob8a28252008-05-14 21:23:00 +0800697 return err;
698}
699
700static int cryptd_hash_enqueue(struct ahash_request *req,
Mark Rustad3e3dc252014-07-25 02:53:38 -0700701 crypto_completion_t compl)
Loc Hob8a28252008-05-14 21:23:00 +0800702{
703 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
704 struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
Huang Ying254eff72009-02-19 14:42:19 +0800705 struct cryptd_queue *queue =
706 cryptd_get_queue(crypto_ahash_tfm(tfm));
Loc Hob8a28252008-05-14 21:23:00 +0800707
708 rctx->complete = req->base.complete;
Mark Rustad3e3dc252014-07-25 02:53:38 -0700709 req->base.complete = compl;
Loc Hob8a28252008-05-14 21:23:00 +0800710
Huang Ying254eff72009-02-19 14:42:19 +0800711 return cryptd_enqueue_request(queue, &req->base);
Loc Hob8a28252008-05-14 21:23:00 +0800712}
713
Herbert Xu81760ea2016-06-21 16:55:13 +0800714static 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
Loc Hob8a28252008-05-14 21:23:00 +0800729static void cryptd_hash_init(struct crypto_async_request *req_async, int err)
730{
Herbert Xu46309d82009-07-12 21:38:59 +0800731 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;
Loc Hob8a28252008-05-14 21:23:00 +0800736
737 if (unlikely(err == -EINPROGRESS))
738 goto out;
739
Herbert Xu46309d82009-07-12 21:38:59 +0800740 desc->tfm = child;
741 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
Loc Hob8a28252008-05-14 21:23:00 +0800742
Herbert Xu46309d82009-07-12 21:38:59 +0800743 err = crypto_shash_init(desc);
Loc Hob8a28252008-05-14 21:23:00 +0800744
745 req->base.complete = rctx->complete;
746
747out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800748 cryptd_hash_complete(req, err);
Loc Hob8a28252008-05-14 21:23:00 +0800749}
750
751static int cryptd_hash_init_enqueue(struct ahash_request *req)
752{
753 return cryptd_hash_enqueue(req, cryptd_hash_init);
754}
755
756static void cryptd_hash_update(struct crypto_async_request *req_async, int err)
757{
Herbert Xu46309d82009-07-12 21:38:59 +0800758 struct ahash_request *req = ahash_request_cast(req_async);
Loc Hob8a28252008-05-14 21:23:00 +0800759 struct cryptd_hash_request_ctx *rctx;
Loc Hob8a28252008-05-14 21:23:00 +0800760
761 rctx = ahash_request_ctx(req);
762
763 if (unlikely(err == -EINPROGRESS))
764 goto out;
765
Herbert Xu46309d82009-07-12 21:38:59 +0800766 err = shash_ahash_update(req, &rctx->desc);
Loc Hob8a28252008-05-14 21:23:00 +0800767
768 req->base.complete = rctx->complete;
769
770out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800771 cryptd_hash_complete(req, err);
Loc Hob8a28252008-05-14 21:23:00 +0800772}
773
774static int cryptd_hash_update_enqueue(struct ahash_request *req)
775{
776 return cryptd_hash_enqueue(req, cryptd_hash_update);
777}
778
779static void cryptd_hash_final(struct crypto_async_request *req_async, int err)
780{
Herbert Xu46309d82009-07-12 21:38:59 +0800781 struct ahash_request *req = ahash_request_cast(req_async);
782 struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
Loc Hob8a28252008-05-14 21:23:00 +0800783
784 if (unlikely(err == -EINPROGRESS))
785 goto out;
786
Herbert Xu46309d82009-07-12 21:38:59 +0800787 err = crypto_shash_final(&rctx->desc, req->result);
Loc Hob8a28252008-05-14 21:23:00 +0800788
789 req->base.complete = rctx->complete;
790
791out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800792 cryptd_hash_complete(req, err);
Loc Hob8a28252008-05-14 21:23:00 +0800793}
794
795static int cryptd_hash_final_enqueue(struct ahash_request *req)
796{
797 return cryptd_hash_enqueue(req, cryptd_hash_final);
798}
799
Herbert Xu6fba00d2009-07-22 11:10:22 +0800800static 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
812out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800813 cryptd_hash_complete(req, err);
Herbert Xu6fba00d2009-07-22 11:10:22 +0800814}
815
816static int cryptd_hash_finup_enqueue(struct ahash_request *req)
817{
818 return cryptd_hash_enqueue(req, cryptd_hash_finup);
819}
820
Loc Hob8a28252008-05-14 21:23:00 +0800821static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
822{
Herbert Xu46309d82009-07-12 21:38:59 +0800823 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;
Loc Hob8a28252008-05-14 21:23:00 +0800828
829 if (unlikely(err == -EINPROGRESS))
830 goto out;
831
Herbert Xu46309d82009-07-12 21:38:59 +0800832 desc->tfm = child;
833 desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
Loc Hob8a28252008-05-14 21:23:00 +0800834
Herbert Xu46309d82009-07-12 21:38:59 +0800835 err = shash_ahash_digest(req, desc);
Loc Hob8a28252008-05-14 21:23:00 +0800836
837 req->base.complete = rctx->complete;
838
839out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800840 cryptd_hash_complete(req, err);
Loc Hob8a28252008-05-14 21:23:00 +0800841}
842
843static int cryptd_hash_digest_enqueue(struct ahash_request *req)
844{
845 return cryptd_hash_enqueue(req, cryptd_hash_digest);
846}
847
Herbert Xu6fba00d2009-07-22 11:10:22 +0800848static 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
855static int cryptd_hash_import(struct ahash_request *req, const void *in)
856{
Ard Biesheuvel0bd22232016-09-01 14:25:43 +0100857 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);
Herbert Xu6fba00d2009-07-22 11:10:22 +0800860
Ard Biesheuvel0bd22232016-09-01 14:25:43 +0100861 desc->tfm = ctx->child;
862 desc->flags = req->base.flags;
863
864 return crypto_shash_import(desc, in);
Herbert Xu6fba00d2009-07-22 11:10:22 +0800865}
866
Herbert Xu9cd899a2009-07-14 18:45:45 +0800867static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
868 struct cryptd_queue *queue)
Loc Hob8a28252008-05-14 21:23:00 +0800869{
Herbert Xu46309d82009-07-12 21:38:59 +0800870 struct hashd_instance_ctx *ctx;
Herbert Xu0b535ad2009-07-14 19:11:32 +0800871 struct ahash_instance *inst;
Herbert Xu46309d82009-07-12 21:38:59 +0800872 struct shash_alg *salg;
Loc Hob8a28252008-05-14 21:23:00 +0800873 struct crypto_alg *alg;
Stephan Mueller466a7b92015-03-30 21:57:06 +0200874 u32 type = 0;
875 u32 mask = 0;
Herbert Xu46309d82009-07-12 21:38:59 +0800876 int err;
Loc Hob8a28252008-05-14 21:23:00 +0800877
Stephan Mueller466a7b92015-03-30 21:57:06 +0200878 cryptd_check_internal(tb, &type, &mask);
879
880 salg = shash_attr_alg(tb[1], type, mask);
Herbert Xu46309d82009-07-12 21:38:59 +0800881 if (IS_ERR(salg))
Herbert Xu9cd899a2009-07-14 18:45:45 +0800882 return PTR_ERR(salg);
Loc Hob8a28252008-05-14 21:23:00 +0800883
Herbert Xu46309d82009-07-12 21:38:59 +0800884 alg = &salg->base;
Herbert Xu0b535ad2009-07-14 19:11:32 +0800885 inst = cryptd_alloc_instance(alg, ahash_instance_headroom(),
886 sizeof(*ctx));
Steffen Klassert05ed8752009-07-15 16:51:04 +0800887 err = PTR_ERR(inst);
Loc Hob8a28252008-05-14 21:23:00 +0800888 if (IS_ERR(inst))
889 goto out_put_alg;
890
Herbert Xu0b535ad2009-07-14 19:11:32 +0800891 ctx = ahash_instance_ctx(inst);
Herbert Xu46309d82009-07-12 21:38:59 +0800892 ctx->queue = queue;
893
Herbert Xu0b535ad2009-07-14 19:11:32 +0800894 err = crypto_init_shash_spawn(&ctx->spawn, salg,
895 ahash_crypto_instance(inst));
Herbert Xu46309d82009-07-12 21:38:59 +0800896 if (err)
897 goto out_free_inst;
898
Eric Biggersa208fa82018-01-03 11:16:26 -0800899 inst->alg.halg.base.cra_flags = CRYPTO_ALG_ASYNC |
900 (alg->cra_flags & (CRYPTO_ALG_INTERNAL |
901 CRYPTO_ALG_OPTIONAL_KEY));
Loc Hob8a28252008-05-14 21:23:00 +0800902
Herbert Xu0b535ad2009-07-14 19:11:32 +0800903 inst->alg.halg.digestsize = salg->digestsize;
Wang, Rui Y1a078342015-11-29 22:45:34 +0800904 inst->alg.halg.statesize = salg->statesize;
Herbert Xu0b535ad2009-07-14 19:11:32 +0800905 inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);
Loc Hob8a28252008-05-14 21:23:00 +0800906
Herbert Xu0b535ad2009-07-14 19:11:32 +0800907 inst->alg.halg.base.cra_init = cryptd_hash_init_tfm;
908 inst->alg.halg.base.cra_exit = cryptd_hash_exit_tfm;
Loc Hob8a28252008-05-14 21:23:00 +0800909
Herbert Xu0b535ad2009-07-14 19:11:32 +0800910 inst->alg.init = cryptd_hash_init_enqueue;
911 inst->alg.update = cryptd_hash_update_enqueue;
912 inst->alg.final = cryptd_hash_final_enqueue;
Herbert Xu6fba00d2009-07-22 11:10:22 +0800913 inst->alg.finup = cryptd_hash_finup_enqueue;
914 inst->alg.export = cryptd_hash_export;
915 inst->alg.import = cryptd_hash_import;
Eric Biggers841a3ff2018-01-03 11:16:23 -0800916 if (crypto_shash_alg_has_setkey(salg))
917 inst->alg.setkey = cryptd_hash_setkey;
Herbert Xu0b535ad2009-07-14 19:11:32 +0800918 inst->alg.digest = cryptd_hash_digest_enqueue;
Loc Hob8a28252008-05-14 21:23:00 +0800919
Herbert Xu0b535ad2009-07-14 19:11:32 +0800920 err = ahash_register_instance(tmpl, inst);
Herbert Xu9cd899a2009-07-14 18:45:45 +0800921 if (err) {
922 crypto_drop_shash(&ctx->spawn);
923out_free_inst:
924 kfree(inst);
925 }
926
Loc Hob8a28252008-05-14 21:23:00 +0800927out_put_alg:
928 crypto_mod_put(alg);
Herbert Xu9cd899a2009-07-14 18:45:45 +0800929 return err;
Loc Hob8a28252008-05-14 21:23:00 +0800930}
931
Herbert Xu92b98762015-05-28 22:08:01 +0800932static 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
941static 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
Adrian Hoban298c9262010-09-20 16:05:12 +0800950static 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;
Herbert Xu81760ea2016-06-21 16:55:13 +0800956 struct cryptd_aead_ctx *ctx;
Herbert Xuec9f2002015-07-06 19:11:03 +0800957 crypto_completion_t compl;
Herbert Xu81760ea2016-06-21 16:55:13 +0800958 struct crypto_aead *tfm;
959 int refcnt;
Herbert Xuec9f2002015-07-06 19:11:03 +0800960
Adrian Hoban298c9262010-09-20 16:05:12 +0800961 rctx = aead_request_ctx(req);
Herbert Xuec9f2002015-07-06 19:11:03 +0800962 compl = rctx->complete;
Adrian Hoban298c9262010-09-20 16:05:12 +0800963
Herbert Xu31bd44e2016-08-25 16:49:51 +0800964 tfm = crypto_aead_reqtfm(req);
965
Adrian Hoban298c9262010-09-20 16:05:12 +0800966 if (unlikely(err == -EINPROGRESS))
967 goto out;
968 aead_request_set_tfm(req, child);
969 err = crypt( req );
Herbert Xu81760ea2016-06-21 16:55:13 +0800970
Adrian Hoban298c9262010-09-20 16:05:12 +0800971out:
Herbert Xu81760ea2016-06-21 16:55:13 +0800972 ctx = crypto_aead_ctx(tfm);
973 refcnt = atomic_read(&ctx->refcnt);
974
Adrian Hoban298c9262010-09-20 16:05:12 +0800975 local_bh_disable();
Herbert Xuec9f2002015-07-06 19:11:03 +0800976 compl(&req->base, err);
Adrian Hoban298c9262010-09-20 16:05:12 +0800977 local_bh_enable();
Herbert Xu81760ea2016-06-21 16:55:13 +0800978
979 if (err != -EINPROGRESS && refcnt && atomic_dec_and_test(&ctx->refcnt))
980 crypto_free_aead(tfm);
Adrian Hoban298c9262010-09-20 16:05:12 +0800981}
982
983static 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);
Herbert Xuba3749a2015-08-13 17:29:02 +0800990 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->encrypt);
Adrian Hoban298c9262010-09-20 16:05:12 +0800991}
992
993static 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);
Herbert Xuba3749a2015-08-13 17:29:02 +08001000 cryptd_aead_crypt(req, child, err, crypto_aead_alg(child)->decrypt);
Adrian Hoban298c9262010-09-20 16:05:12 +08001001}
1002
1003static int cryptd_aead_enqueue(struct aead_request *req,
Mark Rustad3e3dc252014-07-25 02:53:38 -07001004 crypto_completion_t compl)
Adrian Hoban298c9262010-09-20 16:05:12 +08001005{
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;
Mark Rustad3e3dc252014-07-25 02:53:38 -07001011 req->base.complete = compl;
Adrian Hoban298c9262010-09-20 16:05:12 +08001012 return cryptd_enqueue_request(queue, &req->base);
1013}
1014
1015static int cryptd_aead_encrypt_enqueue(struct aead_request *req)
1016{
1017 return cryptd_aead_enqueue(req, cryptd_aead_encrypt );
1018}
1019
1020static int cryptd_aead_decrypt_enqueue(struct aead_request *req)
1021{
1022 return cryptd_aead_enqueue(req, cryptd_aead_decrypt );
1023}
1024
Herbert Xuf614e542015-05-28 22:08:04 +08001025static int cryptd_aead_init_tfm(struct crypto_aead *tfm)
Adrian Hoban298c9262010-09-20 16:05:12 +08001026{
Herbert Xuf614e542015-05-28 22:08:04 +08001027 struct aead_instance *inst = aead_alg_instance(tfm);
1028 struct aead_instance_ctx *ictx = aead_instance_ctx(inst);
Adrian Hoban298c9262010-09-20 16:05:12 +08001029 struct crypto_aead_spawn *spawn = &ictx->aead_spawn;
Herbert Xuf614e542015-05-28 22:08:04 +08001030 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
Adrian Hoban298c9262010-09-20 16:05:12 +08001031 struct crypto_aead *cipher;
1032
1033 cipher = crypto_spawn_aead(spawn);
1034 if (IS_ERR(cipher))
1035 return PTR_ERR(cipher);
1036
Adrian Hoban298c9262010-09-20 16:05:12 +08001037 ctx->child = cipher;
Herbert Xuec9f2002015-07-06 19:11:03 +08001038 crypto_aead_set_reqsize(
1039 tfm, max((unsigned)sizeof(struct cryptd_aead_request_ctx),
1040 crypto_aead_reqsize(cipher)));
Adrian Hoban298c9262010-09-20 16:05:12 +08001041 return 0;
1042}
1043
Herbert Xuf614e542015-05-28 22:08:04 +08001044static void cryptd_aead_exit_tfm(struct crypto_aead *tfm)
Adrian Hoban298c9262010-09-20 16:05:12 +08001045{
Herbert Xuf614e542015-05-28 22:08:04 +08001046 struct cryptd_aead_ctx *ctx = crypto_aead_ctx(tfm);
Adrian Hoban298c9262010-09-20 16:05:12 +08001047 crypto_free_aead(ctx->child);
1048}
1049
1050static int cryptd_create_aead(struct crypto_template *tmpl,
1051 struct rtattr **tb,
1052 struct cryptd_queue *queue)
1053{
1054 struct aead_instance_ctx *ctx;
Herbert Xuf614e542015-05-28 22:08:04 +08001055 struct aead_instance *inst;
1056 struct aead_alg *alg;
Herbert Xu9b8c4562015-05-21 15:10:57 +08001057 const char *name;
1058 u32 type = 0;
Herbert Xuec9f2002015-07-06 19:11:03 +08001059 u32 mask = CRYPTO_ALG_ASYNC;
Adrian Hoban298c9262010-09-20 16:05:12 +08001060 int err;
1061
Stephan Mueller466a7b92015-03-30 21:57:06 +02001062 cryptd_check_internal(tb, &type, &mask);
1063
Herbert Xu9b8c4562015-05-21 15:10:57 +08001064 name = crypto_attr_alg_name(tb[1]);
1065 if (IS_ERR(name))
1066 return PTR_ERR(name);
Adrian Hoban298c9262010-09-20 16:05:12 +08001067
Herbert Xu9b8c4562015-05-21 15:10:57 +08001068 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
1069 if (!inst)
1070 return -ENOMEM;
Adrian Hoban298c9262010-09-20 16:05:12 +08001071
Herbert Xuf614e542015-05-28 22:08:04 +08001072 ctx = aead_instance_ctx(inst);
Adrian Hoban298c9262010-09-20 16:05:12 +08001073 ctx->queue = queue;
1074
Herbert Xuf614e542015-05-28 22:08:04 +08001075 crypto_set_aead_spawn(&ctx->aead_spawn, aead_crypto_instance(inst));
Herbert Xu9b8c4562015-05-21 15:10:57 +08001076 err = crypto_grab_aead(&ctx->aead_spawn, name, type, mask);
Adrian Hoban298c9262010-09-20 16:05:12 +08001077 if (err)
1078 goto out_free_inst;
1079
Herbert Xuf614e542015-05-28 22:08:04 +08001080 alg = crypto_spawn_aead_alg(&ctx->aead_spawn);
1081 err = cryptd_init_instance(aead_crypto_instance(inst), &alg->base);
Herbert Xu9b8c4562015-05-21 15:10:57 +08001082 if (err)
1083 goto out_drop_aead;
1084
Herbert Xuf614e542015-05-28 22:08:04 +08001085 inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC |
Herbert Xu5e4b8c12015-08-13 17:29:06 +08001086 (alg->base.cra_flags & CRYPTO_ALG_INTERNAL);
Herbert Xuf614e542015-05-28 22:08:04 +08001087 inst->alg.base.cra_ctxsize = sizeof(struct cryptd_aead_ctx);
Adrian Hoban298c9262010-09-20 16:05:12 +08001088
Herbert Xuf614e542015-05-28 22:08:04 +08001089 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);
Adrian Hoban298c9262010-09-20 16:05:12 +08001100 if (err) {
Herbert Xu9b8c4562015-05-21 15:10:57 +08001101out_drop_aead:
1102 crypto_drop_aead(&ctx->aead_spawn);
Adrian Hoban298c9262010-09-20 16:05:12 +08001103out_free_inst:
1104 kfree(inst);
1105 }
Adrian Hoban298c9262010-09-20 16:05:12 +08001106 return err;
1107}
1108
Huang Ying254eff72009-02-19 14:42:19 +08001109static struct cryptd_queue queue;
Herbert Xu124b53d2007-04-16 20:49:20 +10001110
Herbert Xu9cd899a2009-07-14 18:45:45 +08001111static int cryptd_create(struct crypto_template *tmpl, struct rtattr **tb)
Herbert Xu124b53d2007-04-16 20:49:20 +10001112{
1113 struct crypto_attr_type *algt;
1114
1115 algt = crypto_get_attr_type(tb);
1116 if (IS_ERR(algt))
Herbert Xu9cd899a2009-07-14 18:45:45 +08001117 return PTR_ERR(algt);
Herbert Xu124b53d2007-04-16 20:49:20 +10001118
1119 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
1120 case CRYPTO_ALG_TYPE_BLKCIPHER:
Herbert Xu4e0958d2016-11-22 20:08:23 +08001121 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);
Loc Hob8a28252008-05-14 21:23:00 +08001126 case CRYPTO_ALG_TYPE_DIGEST:
Herbert Xu9cd899a2009-07-14 18:45:45 +08001127 return cryptd_create_hash(tmpl, tb, &queue);
Adrian Hoban298c9262010-09-20 16:05:12 +08001128 case CRYPTO_ALG_TYPE_AEAD:
1129 return cryptd_create_aead(tmpl, tb, &queue);
Herbert Xu124b53d2007-04-16 20:49:20 +10001130 }
1131
Herbert Xu9cd899a2009-07-14 18:45:45 +08001132 return -EINVAL;
Herbert Xu124b53d2007-04-16 20:49:20 +10001133}
1134
1135static void cryptd_free(struct crypto_instance *inst)
1136{
1137 struct cryptd_instance_ctx *ctx = crypto_instance_ctx(inst);
Herbert Xu0b535ad2009-07-14 19:11:32 +08001138 struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst);
Adrian Hoban298c9262010-09-20 16:05:12 +08001139 struct aead_instance_ctx *aead_ctx = crypto_instance_ctx(inst);
Herbert Xu0b535ad2009-07-14 19:11:32 +08001140
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;
Adrian Hoban298c9262010-09-20 16:05:12 +08001146 case CRYPTO_ALG_TYPE_AEAD:
Herbert Xuf614e542015-05-28 22:08:04 +08001147 crypto_drop_aead(&aead_ctx->aead_spawn);
1148 kfree(aead_instance(inst));
Adrian Hoban298c9262010-09-20 16:05:12 +08001149 return;
1150 default:
1151 crypto_drop_spawn(&ctx->spawn);
1152 kfree(inst);
Herbert Xu0b535ad2009-07-14 19:11:32 +08001153 }
Herbert Xu124b53d2007-04-16 20:49:20 +10001154}
1155
1156static struct crypto_template cryptd_tmpl = {
1157 .name = "cryptd",
Herbert Xu9cd899a2009-07-14 18:45:45 +08001158 .create = cryptd_create,
Herbert Xu124b53d2007-04-16 20:49:20 +10001159 .free = cryptd_free,
1160 .module = THIS_MODULE,
1161};
1162
Huang Ying1cac2cb2009-01-18 16:19:46 +11001163struct cryptd_ablkcipher *cryptd_alloc_ablkcipher(const char *alg_name,
1164 u32 type, u32 mask)
1165{
1166 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
Herbert Xu81760ea2016-06-21 16:55:13 +08001167 struct cryptd_blkcipher_ctx *ctx;
Huang Ying505fd212009-03-29 15:33:53 +08001168 struct crypto_tfm *tfm;
Huang Ying1cac2cb2009-01-18 16:19:46 +11001169
1170 if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME,
1171 "cryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME)
1172 return ERR_PTR(-EINVAL);
Alexander Kuleshovc012a792015-11-25 23:48:28 +06001173 type = crypto_skcipher_type(type);
Huang Ying505fd212009-03-29 15:33:53 +08001174 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);
Huang Ying1cac2cb2009-01-18 16:19:46 +11001177 if (IS_ERR(tfm))
1178 return ERR_CAST(tfm);
Huang Ying505fd212009-03-29 15:33:53 +08001179 if (tfm->__crt_alg->cra_module != THIS_MODULE) {
1180 crypto_free_tfm(tfm);
Huang Ying1cac2cb2009-01-18 16:19:46 +11001181 return ERR_PTR(-EINVAL);
1182 }
1183
Herbert Xu81760ea2016-06-21 16:55:13 +08001184 ctx = crypto_tfm_ctx(tfm);
1185 atomic_set(&ctx->refcnt, 1);
1186
Huang Ying505fd212009-03-29 15:33:53 +08001187 return __cryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm));
Huang Ying1cac2cb2009-01-18 16:19:46 +11001188}
1189EXPORT_SYMBOL_GPL(cryptd_alloc_ablkcipher);
1190
1191struct 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}
1196EXPORT_SYMBOL_GPL(cryptd_ablkcipher_child);
1197
Herbert Xu81760ea2016-06-21 16:55:13 +08001198bool 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}
1204EXPORT_SYMBOL_GPL(cryptd_ablkcipher_queued);
1205
Huang Ying1cac2cb2009-01-18 16:19:46 +11001206void cryptd_free_ablkcipher(struct cryptd_ablkcipher *tfm)
1207{
Herbert Xu81760ea2016-06-21 16:55:13 +08001208 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);
Huang Ying1cac2cb2009-01-18 16:19:46 +11001212}
1213EXPORT_SYMBOL_GPL(cryptd_free_ablkcipher);
1214
Herbert Xu4e0958d2016-11-22 20:08:23 +08001215struct 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}
1240EXPORT_SYMBOL_GPL(cryptd_alloc_skcipher);
1241
1242struct 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}
1248EXPORT_SYMBOL_GPL(cryptd_skcipher_child);
1249
1250bool 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}
1256EXPORT_SYMBOL_GPL(cryptd_skcipher_queued);
1257
1258void 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}
1265EXPORT_SYMBOL_GPL(cryptd_free_skcipher);
1266
Huang Yingace13662009-08-06 15:35:20 +10001267struct cryptd_ahash *cryptd_alloc_ahash(const char *alg_name,
1268 u32 type, u32 mask)
1269{
1270 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
Herbert Xu81760ea2016-06-21 16:55:13 +08001271 struct cryptd_hash_ctx *ctx;
Huang Yingace13662009-08-06 15:35:20 +10001272 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
Herbert Xu81760ea2016-06-21 16:55:13 +08001285 ctx = crypto_ahash_ctx(tfm);
1286 atomic_set(&ctx->refcnt, 1);
1287
Huang Yingace13662009-08-06 15:35:20 +10001288 return __cryptd_ahash_cast(tfm);
1289}
1290EXPORT_SYMBOL_GPL(cryptd_alloc_ahash);
1291
1292struct 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}
1298EXPORT_SYMBOL_GPL(cryptd_ahash_child);
1299
Huang Ying0e1227d2009-10-19 11:53:06 +09001300struct 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}
1305EXPORT_SYMBOL_GPL(cryptd_shash_desc);
1306
Herbert Xu81760ea2016-06-21 16:55:13 +08001307bool 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}
1313EXPORT_SYMBOL_GPL(cryptd_ahash_queued);
1314
Huang Yingace13662009-08-06 15:35:20 +10001315void cryptd_free_ahash(struct cryptd_ahash *tfm)
1316{
Herbert Xu81760ea2016-06-21 16:55:13 +08001317 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);
Huang Yingace13662009-08-06 15:35:20 +10001321}
1322EXPORT_SYMBOL_GPL(cryptd_free_ahash);
1323
Adrian Hoban298c9262010-09-20 16:05:12 +08001324struct cryptd_aead *cryptd_alloc_aead(const char *alg_name,
1325 u32 type, u32 mask)
1326{
1327 char cryptd_alg_name[CRYPTO_MAX_ALG_NAME];
Herbert Xu81760ea2016-06-21 16:55:13 +08001328 struct cryptd_aead_ctx *ctx;
Adrian Hoban298c9262010-09-20 16:05:12 +08001329 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 }
Herbert Xu81760ea2016-06-21 16:55:13 +08001341
1342 ctx = crypto_aead_ctx(tfm);
1343 atomic_set(&ctx->refcnt, 1);
1344
Adrian Hoban298c9262010-09-20 16:05:12 +08001345 return __cryptd_aead_cast(tfm);
1346}
1347EXPORT_SYMBOL_GPL(cryptd_alloc_aead);
1348
1349struct 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}
1355EXPORT_SYMBOL_GPL(cryptd_aead_child);
1356
Herbert Xu81760ea2016-06-21 16:55:13 +08001357bool 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}
1363EXPORT_SYMBOL_GPL(cryptd_aead_queued);
1364
Adrian Hoban298c9262010-09-20 16:05:12 +08001365void cryptd_free_aead(struct cryptd_aead *tfm)
1366{
Herbert Xu81760ea2016-06-21 16:55:13 +08001367 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);
Adrian Hoban298c9262010-09-20 16:05:12 +08001371}
1372EXPORT_SYMBOL_GPL(cryptd_free_aead);
1373
Herbert Xu124b53d2007-04-16 20:49:20 +10001374static int __init cryptd_init(void)
1375{
1376 int err;
1377
Jon Maxwellc3a53602017-11-22 16:08:17 +11001378 err = cryptd_init_queue(&queue, cryptd_max_cpu_qlen);
Herbert Xu124b53d2007-04-16 20:49:20 +10001379 if (err)
1380 return err;
1381
1382 err = crypto_register_template(&cryptd_tmpl);
1383 if (err)
Huang Ying254eff72009-02-19 14:42:19 +08001384 cryptd_fini_queue(&queue);
Herbert Xu124b53d2007-04-16 20:49:20 +10001385
1386 return err;
1387}
1388
1389static void __exit cryptd_exit(void)
1390{
Huang Ying254eff72009-02-19 14:42:19 +08001391 cryptd_fini_queue(&queue);
Herbert Xu124b53d2007-04-16 20:49:20 +10001392 crypto_unregister_template(&cryptd_tmpl);
1393}
1394
Herbert Xub2bac6ac2011-08-19 16:11:23 +08001395subsys_initcall(cryptd_init);
Herbert Xu124b53d2007-04-16 20:49:20 +10001396module_exit(cryptd_exit);
1397
1398MODULE_LICENSE("GPL");
1399MODULE_DESCRIPTION("Software async crypto daemon");
Kees Cook4943ba12014-11-24 16:32:38 -08001400MODULE_ALIAS_CRYPTO("cryptd");