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Merge tag 'amd-drm-fixes-5.12-2021-03-03' of https://gitlab.freedesktop.org/agd5f...
[mirror_ubuntu-jammy-kernel.git] / crypto / algapi.c
CommitLineData
2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
cce9e06d
HX
2/*
3 * Cryptographic API for algorithms (i.e., low-level API).
4 *
5 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
cce9e06d
HX
6 */
7
13c935bb 8#include <crypto/algapi.h>
6bfd4809 9#include <linux/err.h>
cce9e06d 10#include <linux/errno.h>
3133d76f 11#include <linux/fips.h>
cce9e06d
HX
12#include <linux/init.h>
13#include <linux/kernel.h>
4cc7720c 14#include <linux/list.h>
cce9e06d 15#include <linux/module.h>
7fed0bf2 16#include <linux/rtnetlink.h>
5a0e3ad6 17#include <linux/slab.h>
cce9e06d
HX
18#include <linux/string.h>
19
20#include "internal.h"
21
4cc7720c
HX
22static LIST_HEAD(crypto_template_list);
23
002c77a4
JW
24static inline void crypto_check_module_sig(struct module *mod)
25{
59afdc7b 26 if (fips_enabled && mod && !module_sig_ok(mod))
002c77a4 27 panic("Module %s signature verification failed in FIPS mode\n",
bd4a7c69 28 module_name(mod));
002c77a4
JW
29}
30
4cc7720c 31static int crypto_check_alg(struct crypto_alg *alg)
cce9e06d 32{
002c77a4
JW
33 crypto_check_module_sig(alg->cra_module);
34
177f87d0
EB
35 if (!alg->cra_name[0] || !alg->cra_driver_name[0])
36 return -EINVAL;
37
cce9e06d
HX
38 if (alg->cra_alignmask & (alg->cra_alignmask + 1))
39 return -EINVAL;
40
a9f7f88a
KC
41 /* General maximums for all algs. */
42 if (alg->cra_alignmask > MAX_ALGAPI_ALIGNMASK)
cce9e06d
HX
43 return -EINVAL;
44
a9f7f88a
KC
45 if (alg->cra_blocksize > MAX_ALGAPI_BLOCKSIZE)
46 return -EINVAL;
47
48 /* Lower maximums for specific alg types. */
13c935bb
SM
49 if (!alg->cra_type && (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
50 CRYPTO_ALG_TYPE_CIPHER) {
51 if (alg->cra_alignmask > MAX_CIPHER_ALIGNMASK)
52 return -EINVAL;
53
54 if (alg->cra_blocksize > MAX_CIPHER_BLOCKSIZE)
55 return -EINVAL;
56 }
57
cce9e06d
HX
58 if (alg->cra_priority < 0)
59 return -EINVAL;
cce9e06d 60
ce8614a3 61 refcount_set(&alg->cra_refcnt, 1);
e9b8e5be 62
177f87d0 63 return 0;
4cc7720c
HX
64}
65
319382a6
HX
66static void crypto_free_instance(struct crypto_instance *inst)
67{
319382a6
HX
68 inst->alg.cra_type->free(inst);
69}
70
6bfd4809
HX
71static void crypto_destroy_instance(struct crypto_alg *alg)
72{
73 struct crypto_instance *inst = (void *)alg;
74 struct crypto_template *tmpl = inst->tmpl;
75
319382a6 76 crypto_free_instance(inst);
6bfd4809
HX
77 crypto_tmpl_put(tmpl);
78}
79
02244ba4
HX
80/*
81 * This function adds a spawn to the list secondary_spawns which
82 * will be used at the end of crypto_remove_spawns to unregister
83 * instances, unless the spawn happens to be one that is depended
84 * on by the new algorithm (nalg in crypto_remove_spawns).
85 *
86 * This function is also responsible for resurrecting any algorithms
87 * in the dependency chain of nalg by unsetting n->dead.
88 */
2bf29016
HX
89static struct list_head *crypto_more_spawns(struct crypto_alg *alg,
90 struct list_head *stack,
91 struct list_head *top,
92 struct list_head *secondary_spawns)
93{
94 struct crypto_spawn *spawn, *n;
95
304e4818
GT
96 spawn = list_first_entry_or_null(stack, struct crypto_spawn, list);
97 if (!spawn)
2bf29016
HX
98 return NULL;
99
4f87ee11
HX
100 n = list_prev_entry(spawn, list);
101 list_move(&spawn->list, secondary_spawns);
2bf29016 102
4f87ee11
HX
103 if (list_is_last(&n->list, stack))
104 return top;
2bf29016 105
4f87ee11
HX
106 n = list_next_entry(n, list);
107 if (!spawn->dead)
108 n->dead = false;
2bf29016 109
4f87ee11 110 return &n->inst->alg.cra_users;
2bf29016
HX
111}
112
1f723710
HX
113static void crypto_remove_instance(struct crypto_instance *inst,
114 struct list_head *list)
6bfd4809 115{
a73e6996 116 struct crypto_template *tmpl = inst->tmpl;
6bfd4809 117
a73e6996
HX
118 if (crypto_is_dead(&inst->alg))
119 return;
6bfd4809 120
a73e6996 121 inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
38cb2419 122
a73e6996
HX
123 if (!tmpl || !crypto_tmpl_get(tmpl))
124 return;
125
a73e6996
HX
126 list_move(&inst->alg.cra_list, list);
127 hlist_del(&inst->list);
128 inst->alg.cra_destroy = crypto_destroy_instance;
129
2bf29016 130 BUG_ON(!list_empty(&inst->alg.cra_users));
a73e6996
HX
131}
132
02244ba4
HX
133/*
134 * Given an algorithm alg, remove all algorithms that depend on it
135 * through spawns. If nalg is not null, then exempt any algorithms
136 * that is depended on by nalg. This is useful when nalg itself
137 * depends on alg.
138 */
89b596ba
SK
139void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
140 struct crypto_alg *nalg)
a73e6996 141{
2bf29016 142 u32 new_type = (nalg ?: alg)->cra_flags;
a73e6996
HX
143 struct crypto_spawn *spawn, *n;
144 LIST_HEAD(secondary_spawns);
2bf29016
HX
145 struct list_head *spawns;
146 LIST_HEAD(stack);
147 LIST_HEAD(top);
6bfd4809 148
2bf29016 149 spawns = &alg->cra_users;
a73e6996
HX
150 list_for_each_entry_safe(spawn, n, spawns, list) {
151 if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
6bfd4809
HX
152 continue;
153
2bf29016 154 list_move(&spawn->list, &top);
a73e6996 155 }
6bfd4809 156
02244ba4
HX
157 /*
158 * Perform a depth-first walk starting from alg through
159 * the cra_users tree. The list stack records the path
160 * from alg to the current spawn.
161 */
2bf29016
HX
162 spawns = &top;
163 do {
164 while (!list_empty(spawns)) {
165 struct crypto_instance *inst;
166
167 spawn = list_first_entry(spawns, struct crypto_spawn,
168 list);
169 inst = spawn->inst;
170
2bf29016 171 list_move(&spawn->list, &stack);
5f567fff
HX
172 spawn->dead = !spawn->registered || &inst->alg != nalg;
173
174 if (!spawn->registered)
175 break;
176
177 BUG_ON(&inst->alg == alg);
2bf29016
HX
178
179 if (&inst->alg == nalg)
180 break;
181
2bf29016 182 spawns = &inst->alg.cra_users;
9a006742
EB
183
184 /*
5f567fff
HX
185 * Even if spawn->registered is true, the
186 * instance itself may still be unregistered.
187 * This is because it may have failed during
188 * registration. Therefore we still need to
189 * make the following test.
190 *
9a006742
EB
191 * We may encounter an unregistered instance here, since
192 * an instance's spawns are set up prior to the instance
193 * being registered. An unregistered instance will have
194 * NULL ->cra_users.next, since ->cra_users isn't
195 * properly initialized until registration. But an
196 * unregistered instance cannot have any users, so treat
197 * it the same as ->cra_users being empty.
198 */
199 if (spawns->next == NULL)
200 break;
2bf29016
HX
201 }
202 } while ((spawns = crypto_more_spawns(alg, &stack, &top,
203 &secondary_spawns)));
204
02244ba4
HX
205 /*
206 * Remove all instances that are marked as dead. Also
207 * complete the resurrection of the others by moving them
208 * back to the cra_users list.
209 */
2bf29016 210 list_for_each_entry_safe(spawn, n, &secondary_spawns, list) {
4f87ee11 211 if (!spawn->dead)
2bf29016 212 list_move(&spawn->list, &spawn->alg->cra_users);
5f567fff 213 else if (spawn->registered)
1f723710 214 crypto_remove_instance(spawn->inst, list);
6bfd4809
HX
215 }
216}
89b596ba 217EXPORT_SYMBOL_GPL(crypto_remove_spawns);
6bfd4809 218
73d3864a 219static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
4cc7720c
HX
220{
221 struct crypto_alg *q;
73d3864a 222 struct crypto_larval *larval;
6bfd4809
HX
223 int ret = -EAGAIN;
224
225 if (crypto_is_dead(alg))
73d3864a 226 goto err;
6bfd4809
HX
227
228 INIT_LIST_HEAD(&alg->cra_users);
229
73d3864a
HX
230 /* No cheating! */
231 alg->cra_flags &= ~CRYPTO_ALG_TESTED;
232
6bfd4809 233 ret = -EEXIST;
4cc7720c 234
cce9e06d 235 list_for_each_entry(q, &crypto_alg_list, cra_list) {
4cc7720c 236 if (q == alg)
73d3864a
HX
237 goto err;
238
b8e15992
HX
239 if (crypto_is_moribund(q))
240 continue;
241
73d3864a
HX
242 if (crypto_is_larval(q)) {
243 if (!strcmp(alg->cra_driver_name, q->cra_driver_name))
244 goto err;
245 continue;
246 }
247
248 if (!strcmp(q->cra_driver_name, alg->cra_name) ||
249 !strcmp(q->cra_name, alg->cra_driver_name))
250 goto err;
251 }
252
253 larval = crypto_larval_alloc(alg->cra_name,
254 alg->cra_flags | CRYPTO_ALG_TESTED, 0);
255 if (IS_ERR(larval))
256 goto out;
257
258 ret = -ENOENT;
259 larval->adult = crypto_mod_get(alg);
260 if (!larval->adult)
261 goto free_larval;
262
ce8614a3 263 refcount_set(&larval->alg.cra_refcnt, 1);
73d3864a
HX
264 memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
265 CRYPTO_MAX_ALG_NAME);
266 larval->alg.cra_priority = alg->cra_priority;
267
268 list_add(&alg->cra_list, &crypto_alg_list);
269 list_add(&larval->alg.cra_list, &crypto_alg_list);
270
1f6669b9 271 crypto_stats_init(alg);
cac5818c 272
5357c6c4 273out:
73d3864a
HX
274 return larval;
275
276free_larval:
277 kfree(larval);
278err:
279 larval = ERR_PTR(ret);
280 goto out;
281}
282
283void crypto_alg_tested(const char *name, int err)
284{
285 struct crypto_larval *test;
286 struct crypto_alg *alg;
287 struct crypto_alg *q;
288 LIST_HEAD(list);
2bbb3375 289 bool best;
73d3864a
HX
290
291 down_write(&crypto_alg_sem);
292 list_for_each_entry(q, &crypto_alg_list, cra_list) {
b8e15992 293 if (crypto_is_moribund(q) || !crypto_is_larval(q))
73d3864a
HX
294 continue;
295
296 test = (struct crypto_larval *)q;
297
298 if (!strcmp(q->cra_driver_name, name))
299 goto found;
300 }
301
c7235857 302 pr_err("alg: Unexpected test result for %s: %d\n", name, err);
73d3864a
HX
303 goto unlock;
304
305found:
b8e15992 306 q->cra_flags |= CRYPTO_ALG_DEAD;
73d3864a
HX
307 alg = test->adult;
308 if (err || list_empty(&alg->cra_list))
309 goto complete;
310
311 alg->cra_flags |= CRYPTO_ALG_TESTED;
312
2bbb3375
HX
313 /* Only satisfy larval waiters if we are the best. */
314 best = true;
315 list_for_each_entry(q, &crypto_alg_list, cra_list) {
316 if (crypto_is_moribund(q) || !crypto_is_larval(q))
317 continue;
318
319 if (strcmp(alg->cra_name, q->cra_name))
320 continue;
321
322 if (q->cra_priority > alg->cra_priority) {
323 best = false;
324 break;
325 }
326 }
327
73d3864a
HX
328 list_for_each_entry(q, &crypto_alg_list, cra_list) {
329 if (q == alg)
330 continue;
6bfd4809
HX
331
332 if (crypto_is_moribund(q))
333 continue;
334
335 if (crypto_is_larval(q)) {
2825982d
HX
336 struct crypto_larval *larval = (void *)q;
337
d8058480
HX
338 /*
339 * Check to see if either our generic name or
340 * specific name can satisfy the name requested
341 * by the larval entry q.
342 */
6bfd4809
HX
343 if (strcmp(alg->cra_name, q->cra_name) &&
344 strcmp(alg->cra_driver_name, q->cra_name))
345 continue;
346
347 if (larval->adult)
348 continue;
492e2b63
HX
349 if ((q->cra_flags ^ alg->cra_flags) & larval->mask)
350 continue;
6bfd4809 351
2bbb3375
HX
352 if (best && crypto_mod_get(alg))
353 larval->adult = alg;
354 else
355 larval->adult = ERR_PTR(-EAGAIN);
356
6bfd4809 357 continue;
2825982d 358 }
6bfd4809
HX
359
360 if (strcmp(alg->cra_name, q->cra_name))
361 continue;
362
363 if (strcmp(alg->cra_driver_name, q->cra_driver_name) &&
364 q->cra_priority > alg->cra_priority)
365 continue;
366
2bf29016 367 crypto_remove_spawns(q, &list, alg);
cce9e06d 368 }
2825982d 369
73d3864a
HX
370complete:
371 complete_all(&test->completion);
2825982d 372
73d3864a
HX
373unlock:
374 up_write(&crypto_alg_sem);
375
376 crypto_remove_final(&list);
cce9e06d 377}
73d3864a 378EXPORT_SYMBOL_GPL(crypto_alg_tested);
4cc7720c 379
22e5b20b 380void crypto_remove_final(struct list_head *list)
6bfd4809
HX
381{
382 struct crypto_alg *alg;
383 struct crypto_alg *n;
384
385 list_for_each_entry_safe(alg, n, list, cra_list) {
386 list_del_init(&alg->cra_list);
387 crypto_alg_put(alg);
388 }
389}
22e5b20b 390EXPORT_SYMBOL_GPL(crypto_remove_final);
6bfd4809 391
73d3864a
HX
392static void crypto_wait_for_test(struct crypto_larval *larval)
393{
394 int err;
395
396 err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult);
397 if (err != NOTIFY_STOP) {
398 if (WARN_ON(err != NOTIFY_DONE))
399 goto out;
400 crypto_alg_tested(larval->alg.cra_driver_name, 0);
401 }
402
3fc89adb 403 err = wait_for_completion_killable(&larval->completion);
73d3864a 404 WARN_ON(err);
dd8b083f 405 if (!err)
beeb460c 406 crypto_notify(CRYPTO_MSG_ALG_LOADED, larval);
73d3864a
HX
407
408out:
409 crypto_larval_kill(&larval->alg);
410}
411
4cc7720c
HX
412int crypto_register_alg(struct crypto_alg *alg)
413{
73d3864a 414 struct crypto_larval *larval;
4cc7720c
HX
415 int err;
416
d6040764 417 alg->cra_flags &= ~CRYPTO_ALG_DEAD;
4cc7720c
HX
418 err = crypto_check_alg(alg);
419 if (err)
420 return err;
421
422 down_write(&crypto_alg_sem);
73d3864a 423 larval = __crypto_register_alg(alg);
4cc7720c
HX
424 up_write(&crypto_alg_sem);
425
73d3864a
HX
426 if (IS_ERR(larval))
427 return PTR_ERR(larval);
428
429 crypto_wait_for_test(larval);
430 return 0;
4cc7720c 431}
cce9e06d
HX
432EXPORT_SYMBOL_GPL(crypto_register_alg);
433
6bfd4809
HX
434static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list)
435{
436 if (unlikely(list_empty(&alg->cra_list)))
437 return -ENOENT;
438
439 alg->cra_flags |= CRYPTO_ALG_DEAD;
440
6bfd4809 441 list_del_init(&alg->cra_list);
2bf29016 442 crypto_remove_spawns(alg, list, NULL);
6bfd4809
HX
443
444 return 0;
445}
446
c6d633a9 447void crypto_unregister_alg(struct crypto_alg *alg)
cce9e06d 448{
6bfd4809
HX
449 int ret;
450 LIST_HEAD(list);
5357c6c4 451
cce9e06d 452 down_write(&crypto_alg_sem);
6bfd4809 453 ret = crypto_remove_alg(alg, &list);
cce9e06d
HX
454 up_write(&crypto_alg_sem);
455
c6d633a9
EB
456 if (WARN(ret, "Algorithm %s is not registered", alg->cra_driver_name))
457 return;
cce9e06d 458
ce8614a3 459 BUG_ON(refcount_read(&alg->cra_refcnt) != 1);
cce9e06d
HX
460 if (alg->cra_destroy)
461 alg->cra_destroy(alg);
462
6bfd4809 463 crypto_remove_final(&list);
cce9e06d
HX
464}
465EXPORT_SYMBOL_GPL(crypto_unregister_alg);
466
4b004346
MB
467int crypto_register_algs(struct crypto_alg *algs, int count)
468{
469 int i, ret;
470
471 for (i = 0; i < count; i++) {
472 ret = crypto_register_alg(&algs[i]);
473 if (ret)
474 goto err;
475 }
476
477 return 0;
478
479err:
480 for (--i; i >= 0; --i)
481 crypto_unregister_alg(&algs[i]);
482
483 return ret;
484}
485EXPORT_SYMBOL_GPL(crypto_register_algs);
486
c6d633a9 487void crypto_unregister_algs(struct crypto_alg *algs, int count)
4b004346 488{
c6d633a9 489 int i;
4b004346 490
c6d633a9
EB
491 for (i = 0; i < count; i++)
492 crypto_unregister_alg(&algs[i]);
4b004346
MB
493}
494EXPORT_SYMBOL_GPL(crypto_unregister_algs);
495
4cc7720c
HX
496int crypto_register_template(struct crypto_template *tmpl)
497{
498 struct crypto_template *q;
499 int err = -EEXIST;
500
501 down_write(&crypto_alg_sem);
502
002c77a4
JW
503 crypto_check_module_sig(tmpl->module);
504
4cc7720c
HX
505 list_for_each_entry(q, &crypto_template_list, list) {
506 if (q == tmpl)
507 goto out;
508 }
509
510 list_add(&tmpl->list, &crypto_template_list);
511 err = 0;
512out:
513 up_write(&crypto_alg_sem);
514 return err;
515}
516EXPORT_SYMBOL_GPL(crypto_register_template);
517
9572442d
XW
518int crypto_register_templates(struct crypto_template *tmpls, int count)
519{
520 int i, err;
521
522 for (i = 0; i < count; i++) {
523 err = crypto_register_template(&tmpls[i]);
524 if (err)
525 goto out;
526 }
527 return 0;
528
529out:
530 for (--i; i >= 0; --i)
531 crypto_unregister_template(&tmpls[i]);
532 return err;
533}
534EXPORT_SYMBOL_GPL(crypto_register_templates);
535
4cc7720c
HX
536void crypto_unregister_template(struct crypto_template *tmpl)
537{
538 struct crypto_instance *inst;
b67bfe0d 539 struct hlist_node *n;
4cc7720c 540 struct hlist_head *list;
6bfd4809 541 LIST_HEAD(users);
4cc7720c
HX
542
543 down_write(&crypto_alg_sem);
544
545 BUG_ON(list_empty(&tmpl->list));
546 list_del_init(&tmpl->list);
547
548 list = &tmpl->instances;
b67bfe0d 549 hlist_for_each_entry(inst, list, list) {
6bfd4809 550 int err = crypto_remove_alg(&inst->alg, &users);
0efcb8d5 551
6bfd4809 552 BUG_ON(err);
4cc7720c
HX
553 }
554
555 up_write(&crypto_alg_sem);
556
b67bfe0d 557 hlist_for_each_entry_safe(inst, n, list, list) {
ce8614a3 558 BUG_ON(refcount_read(&inst->alg.cra_refcnt) != 1);
319382a6 559 crypto_free_instance(inst);
4cc7720c 560 }
6bfd4809 561 crypto_remove_final(&users);
4cc7720c
HX
562}
563EXPORT_SYMBOL_GPL(crypto_unregister_template);
564
9572442d
XW
565void crypto_unregister_templates(struct crypto_template *tmpls, int count)
566{
567 int i;
568
569 for (i = count - 1; i >= 0; --i)
570 crypto_unregister_template(&tmpls[i]);
571}
572EXPORT_SYMBOL_GPL(crypto_unregister_templates);
573
4cc7720c
HX
574static struct crypto_template *__crypto_lookup_template(const char *name)
575{
576 struct crypto_template *q, *tmpl = NULL;
577
578 down_read(&crypto_alg_sem);
579 list_for_each_entry(q, &crypto_template_list, list) {
580 if (strcmp(q->name, name))
581 continue;
582 if (unlikely(!crypto_tmpl_get(q)))
583 continue;
584
585 tmpl = q;
586 break;
587 }
588 up_read(&crypto_alg_sem);
589
590 return tmpl;
591}
592
593struct crypto_template *crypto_lookup_template(const char *name)
594{
4943ba16
KC
595 return try_then_request_module(__crypto_lookup_template(name),
596 "crypto-%s", name);
4cc7720c
HX
597}
598EXPORT_SYMBOL_GPL(crypto_lookup_template);
599
600int crypto_register_instance(struct crypto_template *tmpl,
601 struct crypto_instance *inst)
602{
73d3864a 603 struct crypto_larval *larval;
5f567fff 604 struct crypto_spawn *spawn;
73d3864a 605 int err;
4cc7720c 606
4cc7720c
HX
607 err = crypto_check_alg(&inst->alg);
608 if (err)
9c521a20
SM
609 return err;
610
4cc7720c 611 inst->alg.cra_module = tmpl->module;
64a947b1 612 inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE;
4cc7720c
HX
613
614 down_write(&crypto_alg_sem);
615
5f567fff
HX
616 larval = ERR_PTR(-EAGAIN);
617 for (spawn = inst->spawns; spawn;) {
618 struct crypto_spawn *next;
619
620 if (spawn->dead)
621 goto unlock;
622
623 next = spawn->next;
624 spawn->inst = inst;
625 spawn->registered = true;
626
aed11cf5 627 crypto_mod_put(spawn->alg);
5f567fff
HX
628
629 spawn = next;
630 }
631
73d3864a
HX
632 larval = __crypto_register_alg(&inst->alg);
633 if (IS_ERR(larval))
4cc7720c
HX
634 goto unlock;
635
636 hlist_add_head(&inst->list, &tmpl->instances);
637 inst->tmpl = tmpl;
638
639unlock:
640 up_write(&crypto_alg_sem);
641
73d3864a
HX
642 err = PTR_ERR(larval);
643 if (IS_ERR(larval))
644 goto err;
645
646 crypto_wait_for_test(larval);
647 err = 0;
6bfd4809 648
4cc7720c
HX
649err:
650 return err;
651}
652EXPORT_SYMBOL_GPL(crypto_register_instance);
ce3fd840 653
c6d633a9 654void crypto_unregister_instance(struct crypto_instance *inst)
ce3fd840 655{
1f723710 656 LIST_HEAD(list);
ce3fd840 657
ce3fd840
SK
658 down_write(&crypto_alg_sem);
659
87b16756 660 crypto_remove_spawns(&inst->alg, &list, NULL);
1f723710 661 crypto_remove_instance(inst, &list);
ce3fd840
SK
662
663 up_write(&crypto_alg_sem);
664
1f723710 665 crypto_remove_final(&list);
ce3fd840
SK
666}
667EXPORT_SYMBOL_GPL(crypto_unregister_instance);
4cc7720c 668
aed11cf5
EB
669int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
670 const char *name, u32 type, u32 mask)
6bfd4809 671{
aed11cf5 672 struct crypto_alg *alg;
6bfd4809
HX
673 int err = -EAGAIN;
674
6b476662
EB
675 if (WARN_ON_ONCE(inst == NULL))
676 return -EINVAL;
677
aed11cf5
EB
678 /* Allow the result of crypto_attr_alg_name() to be passed directly */
679 if (IS_ERR(name))
680 return PTR_ERR(name);
5f567fff 681
aed11cf5
EB
682 alg = crypto_find_alg(name, spawn->frontend, type, mask);
683 if (IS_ERR(alg))
684 return PTR_ERR(alg);
6bfd4809
HX
685
686 down_write(&crypto_alg_sem);
687 if (!crypto_is_moribund(alg)) {
688 list_add(&spawn->list, &alg->cra_users);
689 spawn->alg = alg;
aed11cf5
EB
690 spawn->mask = mask;
691 spawn->next = inst->spawns;
692 inst->spawns = spawn;
7bcb2c99
EB
693 inst->alg.cra_flags |=
694 (alg->cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
6bfd4809
HX
695 err = 0;
696 }
697 up_write(&crypto_alg_sem);
5f567fff
HX
698 if (err)
699 crypto_mod_put(alg);
d6ef2f19
HX
700 return err;
701}
702EXPORT_SYMBOL_GPL(crypto_grab_spawn);
703
6bfd4809
HX
704void crypto_drop_spawn(struct crypto_spawn *spawn)
705{
ff670627
EB
706 if (!spawn->alg) /* not yet initialized? */
707 return;
708
6bfd4809 709 down_write(&crypto_alg_sem);
4f87ee11 710 if (!spawn->dead)
7db3b61b 711 list_del(&spawn->list);
6bfd4809 712 up_write(&crypto_alg_sem);
5f567fff 713
aed11cf5 714 if (!spawn->registered)
5f567fff 715 crypto_mod_put(spawn->alg);
6bfd4809
HX
716}
717EXPORT_SYMBOL_GPL(crypto_drop_spawn);
718
97eedce1 719static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
6bfd4809 720{
6603523b
HX
721 struct crypto_alg *alg = ERR_PTR(-EAGAIN);
722 struct crypto_alg *target;
723 bool shoot = false;
6bfd4809
HX
724
725 down_read(&crypto_alg_sem);
6603523b
HX
726 if (!spawn->dead) {
727 alg = spawn->alg;
728 if (!crypto_mod_get(alg)) {
729 target = crypto_alg_get(alg);
730 shoot = true;
731 alg = ERR_PTR(-EAGAIN);
732 }
6bfd4809 733 }
73669cc5 734 up_read(&crypto_alg_sem);
6bfd4809 735
6603523b
HX
736 if (shoot) {
737 crypto_shoot_alg(target);
738 crypto_alg_put(target);
739 }
740
741 return alg;
97eedce1
HX
742}
743
744struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
745 u32 mask)
746{
747 struct crypto_alg *alg;
748 struct crypto_tfm *tfm;
749
750 alg = crypto_spawn_alg(spawn);
751 if (IS_ERR(alg))
752 return ERR_CAST(alg);
753
2e306ee0
HX
754 tfm = ERR_PTR(-EINVAL);
755 if (unlikely((alg->cra_flags ^ type) & mask))
756 goto out_put_alg;
757
27d2a330 758 tfm = __crypto_alloc_tfm(alg, type, mask);
6bfd4809 759 if (IS_ERR(tfm))
2e306ee0
HX
760 goto out_put_alg;
761
762 return tfm;
6bfd4809 763
2e306ee0
HX
764out_put_alg:
765 crypto_mod_put(alg);
6bfd4809
HX
766 return tfm;
767}
768EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
769
97eedce1
HX
770void *crypto_spawn_tfm2(struct crypto_spawn *spawn)
771{
772 struct crypto_alg *alg;
773 struct crypto_tfm *tfm;
774
775 alg = crypto_spawn_alg(spawn);
776 if (IS_ERR(alg))
777 return ERR_CAST(alg);
778
779 tfm = crypto_create_tfm(alg, spawn->frontend);
780 if (IS_ERR(tfm))
781 goto out_put_alg;
782
783 return tfm;
784
785out_put_alg:
786 crypto_mod_put(alg);
787 return tfm;
788}
789EXPORT_SYMBOL_GPL(crypto_spawn_tfm2);
790
2825982d
HX
791int crypto_register_notifier(struct notifier_block *nb)
792{
793 return blocking_notifier_chain_register(&crypto_chain, nb);
794}
795EXPORT_SYMBOL_GPL(crypto_register_notifier);
796
797int crypto_unregister_notifier(struct notifier_block *nb)
798{
799 return blocking_notifier_chain_unregister(&crypto_chain, nb);
800}
801EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
802
ebc610e5 803struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb)
7fed0bf2 804{
39e1ee01 805 struct rtattr *rta = tb[0];
ebc610e5
HX
806 struct crypto_attr_type *algt;
807
808 if (!rta)
809 return ERR_PTR(-ENOENT);
810 if (RTA_PAYLOAD(rta) < sizeof(*algt))
811 return ERR_PTR(-EINVAL);
39e1ee01
HX
812 if (rta->rta_type != CRYPTOA_TYPE)
813 return ERR_PTR(-EINVAL);
ebc610e5
HX
814
815 algt = RTA_DATA(rta);
816
817 return algt;
818}
819EXPORT_SYMBOL_GPL(crypto_get_attr_type);
820
7bcb2c99
EB
821/**
822 * crypto_check_attr_type() - check algorithm type and compute inherited mask
823 * @tb: the template parameters
824 * @type: the algorithm type the template would be instantiated as
825 * @mask_ret: (output) the mask that should be passed to crypto_grab_*()
826 * to restrict the flags of any inner algorithms
827 *
828 * Validate that the algorithm type the user requested is compatible with the
829 * one the template would actually be instantiated as. E.g., if the user is
830 * doing crypto_alloc_shash("cbc(aes)", ...), this would return an error because
831 * the "cbc" template creates an "skcipher" algorithm, not an "shash" algorithm.
832 *
833 * Also compute the mask to use to restrict the flags of any inner algorithms.
834 *
835 * Return: 0 on success; -errno on failure
836 */
837int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret)
ebc610e5
HX
838{
839 struct crypto_attr_type *algt;
840
841 algt = crypto_get_attr_type(tb);
842 if (IS_ERR(algt))
843 return PTR_ERR(algt);
844
845 if ((algt->type ^ type) & algt->mask)
846 return -EINVAL;
847
7bcb2c99 848 *mask_ret = crypto_algt_inherited_mask(algt);
ebc610e5
HX
849 return 0;
850}
851EXPORT_SYMBOL_GPL(crypto_check_attr_type);
852
68b6c7d6 853const char *crypto_attr_alg_name(struct rtattr *rta)
ebc610e5 854{
7fed0bf2
HX
855 struct crypto_attr_alg *alga;
856
ebc610e5
HX
857 if (!rta)
858 return ERR_PTR(-ENOENT);
859 if (RTA_PAYLOAD(rta) < sizeof(*alga))
7fed0bf2 860 return ERR_PTR(-EINVAL);
39e1ee01
HX
861 if (rta->rta_type != CRYPTOA_ALG)
862 return ERR_PTR(-EINVAL);
7fed0bf2
HX
863
864 alga = RTA_DATA(rta);
865 alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
866
68b6c7d6
HX
867 return alga->name;
868}
869EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
870
3c09f17c
HX
871int crypto_attr_u32(struct rtattr *rta, u32 *num)
872{
873 struct crypto_attr_u32 *nu32;
874
875 if (!rta)
876 return -ENOENT;
877 if (RTA_PAYLOAD(rta) < sizeof(*nu32))
878 return -EINVAL;
879 if (rta->rta_type != CRYPTOA_U32)
880 return -EINVAL;
881
882 nu32 = RTA_DATA(rta);
883 *num = nu32->num;
884
885 return 0;
886}
887EXPORT_SYMBOL_GPL(crypto_attr_u32);
7fed0bf2 888
32f27c74
HX
889int crypto_inst_setname(struct crypto_instance *inst, const char *name,
890 struct crypto_alg *alg)
891{
892 if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name,
893 alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
894 return -ENAMETOOLONG;
895
896 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
897 name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
898 return -ENAMETOOLONG;
899
900 return 0;
901}
902EXPORT_SYMBOL_GPL(crypto_inst_setname);
903
b5b7f088
HX
904void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)
905{
906 INIT_LIST_HEAD(&queue->list);
907 queue->backlog = &queue->list;
908 queue->qlen = 0;
909 queue->max_qlen = max_qlen;
910}
911EXPORT_SYMBOL_GPL(crypto_init_queue);
912
913int crypto_enqueue_request(struct crypto_queue *queue,
914 struct crypto_async_request *request)
915{
916 int err = -EINPROGRESS;
917
918 if (unlikely(queue->qlen >= queue->max_qlen)) {
6b80ea38
GBY
919 if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
920 err = -ENOSPC;
b5b7f088 921 goto out;
6b80ea38
GBY
922 }
923 err = -EBUSY;
b5b7f088
HX
924 if (queue->backlog == &queue->list)
925 queue->backlog = &request->list;
926 }
927
928 queue->qlen++;
929 list_add_tail(&request->list, &queue->list);
930
931out:
932 return err;
933}
934EXPORT_SYMBOL_GPL(crypto_enqueue_request);
935
ec6e2bf3
IP
936void crypto_enqueue_request_head(struct crypto_queue *queue,
937 struct crypto_async_request *request)
938{
939 queue->qlen++;
940 list_add(&request->list, &queue->list);
941}
942EXPORT_SYMBOL_GPL(crypto_enqueue_request_head);
943
31d228cc 944struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
b5b7f088
HX
945{
946 struct list_head *request;
947
948 if (unlikely(!queue->qlen))
949 return NULL;
950
951 queue->qlen--;
952
953 if (queue->backlog != &queue->list)
954 queue->backlog = queue->backlog->next;
955
956 request = queue->list.next;
957 list_del(request);
958
31d228cc 959 return list_entry(request, struct crypto_async_request, list);
b5b7f088
HX
960}
961EXPORT_SYMBOL_GPL(crypto_dequeue_request);
962
7613636d
HX
963static inline void crypto_inc_byte(u8 *a, unsigned int size)
964{
965 u8 *b = (a + size);
966 u8 c;
967
968 for (; size; size--) {
969 c = *--b + 1;
970 *b = c;
971 if (c)
972 break;
973 }
974}
975
976void crypto_inc(u8 *a, unsigned int size)
977{
978 __be32 *b = (__be32 *)(a + size);
979 u32 c;
980
db91af0f 981 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) ||
27c539ae 982 IS_ALIGNED((unsigned long)b, __alignof__(*b)))
db91af0f
AB
983 for (; size >= 4; size -= 4) {
984 c = be32_to_cpu(*--b) + 1;
985 *b = cpu_to_be32(c);
27c539ae 986 if (likely(c))
db91af0f
AB
987 return;
988 }
7613636d
HX
989
990 crypto_inc_byte(a, size);
991}
992EXPORT_SYMBOL_GPL(crypto_inc);
993
a7c391f0 994void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int len)
7613636d 995{
db91af0f
AB
996 int relalign = 0;
997
998 if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)) {
999 int size = sizeof(unsigned long);
a7c391f0
AB
1000 int d = (((unsigned long)dst ^ (unsigned long)src1) |
1001 ((unsigned long)dst ^ (unsigned long)src2)) &
1002 (size - 1);
db91af0f
AB
1003
1004 relalign = d ? 1 << __ffs(d) : size;
1005
1006 /*
1007 * If we care about alignment, process as many bytes as
1008 * needed to advance dst and src to values whose alignments
1009 * equal their relative alignment. This will allow us to
1010 * process the remainder of the input using optimal strides.
1011 */
1012 while (((unsigned long)dst & (relalign - 1)) && len > 0) {
a7c391f0 1013 *dst++ = *src1++ ^ *src2++;
db91af0f
AB
1014 len--;
1015 }
1016 }
7613636d 1017
db91af0f 1018 while (IS_ENABLED(CONFIG_64BIT) && len >= 8 && !(relalign & 7)) {
a7c391f0 1019 *(u64 *)dst = *(u64 *)src1 ^ *(u64 *)src2;
db91af0f 1020 dst += 8;
a7c391f0
AB
1021 src1 += 8;
1022 src2 += 8;
db91af0f
AB
1023 len -= 8;
1024 }
7613636d 1025
db91af0f 1026 while (len >= 4 && !(relalign & 3)) {
a7c391f0 1027 *(u32 *)dst = *(u32 *)src1 ^ *(u32 *)src2;
db91af0f 1028 dst += 4;
a7c391f0
AB
1029 src1 += 4;
1030 src2 += 4;
db91af0f
AB
1031 len -= 4;
1032 }
1033
1034 while (len >= 2 && !(relalign & 1)) {
a7c391f0 1035 *(u16 *)dst = *(u16 *)src1 ^ *(u16 *)src2;
db91af0f 1036 dst += 2;
a7c391f0
AB
1037 src1 += 2;
1038 src2 += 2;
db91af0f
AB
1039 len -= 2;
1040 }
7613636d 1041
db91af0f 1042 while (len--)
a7c391f0 1043 *dst++ = *src1++ ^ *src2++;
7613636d 1044}
db91af0f 1045EXPORT_SYMBOL_GPL(__crypto_xor);
7613636d 1046
38d21433
HX
1047unsigned int crypto_alg_extsize(struct crypto_alg *alg)
1048{
c2110f28
HX
1049 return alg->cra_ctxsize +
1050 (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1));
38d21433
HX
1051}
1052EXPORT_SYMBOL_GPL(crypto_alg_extsize);
1053
f2aefdab
HX
1054int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
1055 u32 type, u32 mask)
1056{
1057 int ret = 0;
1058 struct crypto_alg *alg = crypto_find_alg(name, frontend, type, mask);
1059
1060 if (!IS_ERR(alg)) {
1061 crypto_mod_put(alg);
1062 ret = 1;
1063 }
1064
1065 return ret;
1066}
1067EXPORT_SYMBOL_GPL(crypto_type_has_alg);
1068
f7d76e05 1069#ifdef CONFIG_CRYPTO_STATS
1f6669b9
CL
1070void crypto_stats_init(struct crypto_alg *alg)
1071{
1072 memset(&alg->stats, 0, sizeof(alg->stats));
1073}
1074EXPORT_SYMBOL_GPL(crypto_stats_init);
1075
f7d76e05
CL
1076void crypto_stats_get(struct crypto_alg *alg)
1077{
1078 crypto_alg_get(alg);
1079}
1080EXPORT_SYMBOL_GPL(crypto_stats_get);
1081
f7d76e05
CL
1082void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg,
1083 int ret)
1084{
1085 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1086 atomic64_inc(&alg->stats.aead.err_cnt);
f7d76e05 1087 } else {
17c18f9e
CL
1088 atomic64_inc(&alg->stats.aead.encrypt_cnt);
1089 atomic64_add(cryptlen, &alg->stats.aead.encrypt_tlen);
f7d76e05
CL
1090 }
1091 crypto_alg_put(alg);
1092}
1093EXPORT_SYMBOL_GPL(crypto_stats_aead_encrypt);
1094
1095void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg,
1096 int ret)
1097{
1098 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1099 atomic64_inc(&alg->stats.aead.err_cnt);
f7d76e05 1100 } else {
17c18f9e
CL
1101 atomic64_inc(&alg->stats.aead.decrypt_cnt);
1102 atomic64_add(cryptlen, &alg->stats.aead.decrypt_tlen);
f7d76e05
CL
1103 }
1104 crypto_alg_put(alg);
1105}
1106EXPORT_SYMBOL_GPL(crypto_stats_aead_decrypt);
1107
1108void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret,
1109 struct crypto_alg *alg)
1110{
1111 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1112 atomic64_inc(&alg->stats.akcipher.err_cnt);
f7d76e05 1113 } else {
17c18f9e
CL
1114 atomic64_inc(&alg->stats.akcipher.encrypt_cnt);
1115 atomic64_add(src_len, &alg->stats.akcipher.encrypt_tlen);
f7d76e05
CL
1116 }
1117 crypto_alg_put(alg);
1118}
1119EXPORT_SYMBOL_GPL(crypto_stats_akcipher_encrypt);
1120
1121void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret,
1122 struct crypto_alg *alg)
1123{
1124 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1125 atomic64_inc(&alg->stats.akcipher.err_cnt);
f7d76e05 1126 } else {
17c18f9e
CL
1127 atomic64_inc(&alg->stats.akcipher.decrypt_cnt);
1128 atomic64_add(src_len, &alg->stats.akcipher.decrypt_tlen);
f7d76e05
CL
1129 }
1130 crypto_alg_put(alg);
1131}
1132EXPORT_SYMBOL_GPL(crypto_stats_akcipher_decrypt);
1133
1134void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg)
1135{
1136 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
44f13133 1137 atomic64_inc(&alg->stats.akcipher.err_cnt);
f7d76e05 1138 else
17c18f9e 1139 atomic64_inc(&alg->stats.akcipher.sign_cnt);
f7d76e05
CL
1140 crypto_alg_put(alg);
1141}
1142EXPORT_SYMBOL_GPL(crypto_stats_akcipher_sign);
1143
1144void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg)
1145{
1146 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
44f13133 1147 atomic64_inc(&alg->stats.akcipher.err_cnt);
f7d76e05 1148 else
17c18f9e 1149 atomic64_inc(&alg->stats.akcipher.verify_cnt);
f7d76e05
CL
1150 crypto_alg_put(alg);
1151}
1152EXPORT_SYMBOL_GPL(crypto_stats_akcipher_verify);
1153
1154void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg)
1155{
1156 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1157 atomic64_inc(&alg->stats.compress.err_cnt);
f7d76e05 1158 } else {
17c18f9e
CL
1159 atomic64_inc(&alg->stats.compress.compress_cnt);
1160 atomic64_add(slen, &alg->stats.compress.compress_tlen);
f7d76e05
CL
1161 }
1162 crypto_alg_put(alg);
1163}
1164EXPORT_SYMBOL_GPL(crypto_stats_compress);
1165
1166void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg)
1167{
1168 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1169 atomic64_inc(&alg->stats.compress.err_cnt);
f7d76e05 1170 } else {
17c18f9e
CL
1171 atomic64_inc(&alg->stats.compress.decompress_cnt);
1172 atomic64_add(slen, &alg->stats.compress.decompress_tlen);
f7d76e05
CL
1173 }
1174 crypto_alg_put(alg);
1175}
1176EXPORT_SYMBOL_GPL(crypto_stats_decompress);
1177
1178void crypto_stats_ahash_update(unsigned int nbytes, int ret,
1179 struct crypto_alg *alg)
1180{
1181 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
44f13133 1182 atomic64_inc(&alg->stats.hash.err_cnt);
f7d76e05 1183 else
17c18f9e 1184 atomic64_add(nbytes, &alg->stats.hash.hash_tlen);
f7d76e05
CL
1185 crypto_alg_put(alg);
1186}
1187EXPORT_SYMBOL_GPL(crypto_stats_ahash_update);
1188
1189void crypto_stats_ahash_final(unsigned int nbytes, int ret,
1190 struct crypto_alg *alg)
1191{
1192 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1193 atomic64_inc(&alg->stats.hash.err_cnt);
f7d76e05 1194 } else {
17c18f9e
CL
1195 atomic64_inc(&alg->stats.hash.hash_cnt);
1196 atomic64_add(nbytes, &alg->stats.hash.hash_tlen);
f7d76e05
CL
1197 }
1198 crypto_alg_put(alg);
1199}
1200EXPORT_SYMBOL_GPL(crypto_stats_ahash_final);
1201
1202void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret)
1203{
1204 if (ret)
44f13133 1205 atomic64_inc(&alg->stats.kpp.err_cnt);
f7d76e05 1206 else
17c18f9e 1207 atomic64_inc(&alg->stats.kpp.setsecret_cnt);
f7d76e05
CL
1208 crypto_alg_put(alg);
1209}
1210EXPORT_SYMBOL_GPL(crypto_stats_kpp_set_secret);
1211
1212void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret)
1213{
1214 if (ret)
44f13133 1215 atomic64_inc(&alg->stats.kpp.err_cnt);
f7d76e05 1216 else
17c18f9e 1217 atomic64_inc(&alg->stats.kpp.generate_public_key_cnt);
f7d76e05
CL
1218 crypto_alg_put(alg);
1219}
1220EXPORT_SYMBOL_GPL(crypto_stats_kpp_generate_public_key);
1221
1222void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret)
1223{
1224 if (ret)
44f13133 1225 atomic64_inc(&alg->stats.kpp.err_cnt);
f7d76e05 1226 else
17c18f9e 1227 atomic64_inc(&alg->stats.kpp.compute_shared_secret_cnt);
f7d76e05
CL
1228 crypto_alg_put(alg);
1229}
1230EXPORT_SYMBOL_GPL(crypto_stats_kpp_compute_shared_secret);
1231
1232void crypto_stats_rng_seed(struct crypto_alg *alg, int ret)
1233{
1234 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
44f13133 1235 atomic64_inc(&alg->stats.rng.err_cnt);
f7d76e05 1236 else
17c18f9e 1237 atomic64_inc(&alg->stats.rng.seed_cnt);
f7d76e05
CL
1238 crypto_alg_put(alg);
1239}
1240EXPORT_SYMBOL_GPL(crypto_stats_rng_seed);
1241
1242void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen,
1243 int ret)
1244{
1245 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1246 atomic64_inc(&alg->stats.rng.err_cnt);
f7d76e05 1247 } else {
17c18f9e
CL
1248 atomic64_inc(&alg->stats.rng.generate_cnt);
1249 atomic64_add(dlen, &alg->stats.rng.generate_tlen);
f7d76e05
CL
1250 }
1251 crypto_alg_put(alg);
1252}
1253EXPORT_SYMBOL_GPL(crypto_stats_rng_generate);
1254
1255void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret,
1256 struct crypto_alg *alg)
1257{
1258 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1259 atomic64_inc(&alg->stats.cipher.err_cnt);
f7d76e05 1260 } else {
17c18f9e
CL
1261 atomic64_inc(&alg->stats.cipher.encrypt_cnt);
1262 atomic64_add(cryptlen, &alg->stats.cipher.encrypt_tlen);
f7d76e05
CL
1263 }
1264 crypto_alg_put(alg);
1265}
1266EXPORT_SYMBOL_GPL(crypto_stats_skcipher_encrypt);
1267
1268void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret,
1269 struct crypto_alg *alg)
1270{
1271 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
44f13133 1272 atomic64_inc(&alg->stats.cipher.err_cnt);
f7d76e05 1273 } else {
17c18f9e
CL
1274 atomic64_inc(&alg->stats.cipher.decrypt_cnt);
1275 atomic64_add(cryptlen, &alg->stats.cipher.decrypt_tlen);
f7d76e05
CL
1276 }
1277 crypto_alg_put(alg);
1278}
1279EXPORT_SYMBOL_GPL(crypto_stats_skcipher_decrypt);
1280#endif
1281
cce9e06d
HX
1282static int __init crypto_algapi_init(void)
1283{
1284 crypto_init_proc();
1285 return 0;
1286}
1287
1288static void __exit crypto_algapi_exit(void)
1289{
1290 crypto_exit_proc();
1291}
1292
1293module_init(crypto_algapi_init);
1294module_exit(crypto_algapi_exit);
1295
1296MODULE_LICENSE("GPL");
1297MODULE_DESCRIPTION("Cryptographic algorithms API");