2 * Cryptographic API for algorithms (i.e., low-level API).
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
13 #include <linux/err.h>
14 #include <linux/errno.h>
15 #include <linux/fips.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/slab.h>
22 #include <linux/string.h>
26 static LIST_HEAD(crypto_template_list
);
28 static inline int crypto_set_driver_name(struct crypto_alg
*alg
)
30 static const char suffix
[] = "-generic";
31 char *driver_name
= alg
->cra_driver_name
;
37 len
= strlcpy(driver_name
, alg
->cra_name
, CRYPTO_MAX_ALG_NAME
);
38 if (len
+ sizeof(suffix
) > CRYPTO_MAX_ALG_NAME
)
41 memcpy(driver_name
+ len
, suffix
, sizeof(suffix
));
45 static inline void crypto_check_module_sig(struct module
*mod
)
47 if (fips_enabled
&& mod
&& !module_sig_ok(mod
))
48 panic("Module %s signature verification failed in FIPS mode\n",
52 static int crypto_check_alg(struct crypto_alg
*alg
)
54 crypto_check_module_sig(alg
->cra_module
);
56 if (alg
->cra_alignmask
& (alg
->cra_alignmask
+ 1))
59 if (alg
->cra_blocksize
> PAGE_SIZE
/ 8)
62 if (alg
->cra_priority
< 0)
65 atomic_set(&alg
->cra_refcnt
, 1);
67 return crypto_set_driver_name(alg
);
70 static void crypto_free_instance(struct crypto_instance
*inst
)
72 if (!inst
->alg
.cra_type
->free
) {
73 inst
->tmpl
->free(inst
);
77 inst
->alg
.cra_type
->free(inst
);
80 static void crypto_destroy_instance(struct crypto_alg
*alg
)
82 struct crypto_instance
*inst
= (void *)alg
;
83 struct crypto_template
*tmpl
= inst
->tmpl
;
85 crypto_free_instance(inst
);
86 crypto_tmpl_put(tmpl
);
89 static 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
)
94 struct crypto_spawn
*spawn
, *n
;
96 if (list_empty(stack
))
99 spawn
= list_first_entry(stack
, struct crypto_spawn
, list
);
100 n
= list_entry(spawn
->list
.next
, struct crypto_spawn
, list
);
102 if (spawn
->alg
&& &n
->list
!= stack
&& !n
->alg
)
103 n
->alg
= (n
->list
.next
== stack
) ? alg
:
104 &list_entry(n
->list
.next
, struct crypto_spawn
,
107 list_move(&spawn
->list
, secondary_spawns
);
109 return &n
->list
== stack
? top
: &n
->inst
->alg
.cra_users
;
112 static void crypto_remove_instance(struct crypto_instance
*inst
,
113 struct list_head
*list
)
115 struct crypto_template
*tmpl
= inst
->tmpl
;
117 if (crypto_is_dead(&inst
->alg
))
120 inst
->alg
.cra_flags
|= CRYPTO_ALG_DEAD
;
121 if (hlist_unhashed(&inst
->list
))
124 if (!tmpl
|| !crypto_tmpl_get(tmpl
))
127 crypto_notify(CRYPTO_MSG_ALG_UNREGISTER
, &inst
->alg
);
128 list_move(&inst
->alg
.cra_list
, list
);
129 hlist_del(&inst
->list
);
130 inst
->alg
.cra_destroy
= crypto_destroy_instance
;
132 BUG_ON(!list_empty(&inst
->alg
.cra_users
));
135 void crypto_remove_spawns(struct crypto_alg
*alg
, struct list_head
*list
,
136 struct crypto_alg
*nalg
)
138 u32 new_type
= (nalg
?: alg
)->cra_flags
;
139 struct crypto_spawn
*spawn
, *n
;
140 LIST_HEAD(secondary_spawns
);
141 struct list_head
*spawns
;
145 spawns
= &alg
->cra_users
;
146 list_for_each_entry_safe(spawn
, n
, spawns
, list
) {
147 if ((spawn
->alg
->cra_flags
^ new_type
) & spawn
->mask
)
150 list_move(&spawn
->list
, &top
);
155 while (!list_empty(spawns
)) {
156 struct crypto_instance
*inst
;
158 spawn
= list_first_entry(spawns
, struct crypto_spawn
,
162 BUG_ON(&inst
->alg
== alg
);
164 list_move(&spawn
->list
, &stack
);
166 if (&inst
->alg
== nalg
)
170 spawns
= &inst
->alg
.cra_users
;
172 } while ((spawns
= crypto_more_spawns(alg
, &stack
, &top
,
173 &secondary_spawns
)));
175 list_for_each_entry_safe(spawn
, n
, &secondary_spawns
, list
) {
177 list_move(&spawn
->list
, &spawn
->alg
->cra_users
);
179 crypto_remove_instance(spawn
->inst
, list
);
182 EXPORT_SYMBOL_GPL(crypto_remove_spawns
);
184 static struct crypto_larval
*__crypto_register_alg(struct crypto_alg
*alg
)
186 struct crypto_alg
*q
;
187 struct crypto_larval
*larval
;
190 if (crypto_is_dead(alg
))
193 INIT_LIST_HEAD(&alg
->cra_users
);
196 alg
->cra_flags
&= ~CRYPTO_ALG_TESTED
;
200 list_for_each_entry(q
, &crypto_alg_list
, cra_list
) {
204 if (crypto_is_moribund(q
))
207 if (crypto_is_larval(q
)) {
208 if (!strcmp(alg
->cra_driver_name
, q
->cra_driver_name
))
213 if (!strcmp(q
->cra_driver_name
, alg
->cra_name
) ||
214 !strcmp(q
->cra_name
, alg
->cra_driver_name
))
218 larval
= crypto_larval_alloc(alg
->cra_name
,
219 alg
->cra_flags
| CRYPTO_ALG_TESTED
, 0);
224 larval
->adult
= crypto_mod_get(alg
);
228 atomic_set(&larval
->alg
.cra_refcnt
, 1);
229 memcpy(larval
->alg
.cra_driver_name
, alg
->cra_driver_name
,
230 CRYPTO_MAX_ALG_NAME
);
231 larval
->alg
.cra_priority
= alg
->cra_priority
;
233 list_add(&alg
->cra_list
, &crypto_alg_list
);
234 list_add(&larval
->alg
.cra_list
, &crypto_alg_list
);
242 larval
= ERR_PTR(ret
);
246 void crypto_alg_tested(const char *name
, int err
)
248 struct crypto_larval
*test
;
249 struct crypto_alg
*alg
;
250 struct crypto_alg
*q
;
253 down_write(&crypto_alg_sem
);
254 list_for_each_entry(q
, &crypto_alg_list
, cra_list
) {
255 if (crypto_is_moribund(q
) || !crypto_is_larval(q
))
258 test
= (struct crypto_larval
*)q
;
260 if (!strcmp(q
->cra_driver_name
, name
))
264 printk(KERN_ERR
"alg: Unexpected test result for %s: %d\n", name
, err
);
268 q
->cra_flags
|= CRYPTO_ALG_DEAD
;
270 if (err
|| list_empty(&alg
->cra_list
))
273 alg
->cra_flags
|= CRYPTO_ALG_TESTED
;
275 list_for_each_entry(q
, &crypto_alg_list
, cra_list
) {
279 if (crypto_is_moribund(q
))
282 if (crypto_is_larval(q
)) {
283 struct crypto_larval
*larval
= (void *)q
;
286 * Check to see if either our generic name or
287 * specific name can satisfy the name requested
288 * by the larval entry q.
290 if (strcmp(alg
->cra_name
, q
->cra_name
) &&
291 strcmp(alg
->cra_driver_name
, q
->cra_name
))
296 if ((q
->cra_flags
^ alg
->cra_flags
) & larval
->mask
)
298 if (!crypto_mod_get(alg
))
305 if (strcmp(alg
->cra_name
, q
->cra_name
))
308 if (strcmp(alg
->cra_driver_name
, q
->cra_driver_name
) &&
309 q
->cra_priority
> alg
->cra_priority
)
312 crypto_remove_spawns(q
, &list
, alg
);
316 complete_all(&test
->completion
);
319 up_write(&crypto_alg_sem
);
321 crypto_remove_final(&list
);
323 EXPORT_SYMBOL_GPL(crypto_alg_tested
);
325 void crypto_remove_final(struct list_head
*list
)
327 struct crypto_alg
*alg
;
328 struct crypto_alg
*n
;
330 list_for_each_entry_safe(alg
, n
, list
, cra_list
) {
331 list_del_init(&alg
->cra_list
);
335 EXPORT_SYMBOL_GPL(crypto_remove_final
);
337 static void crypto_wait_for_test(struct crypto_larval
*larval
)
341 err
= crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER
, larval
->adult
);
342 if (err
!= NOTIFY_STOP
) {
343 if (WARN_ON(err
!= NOTIFY_DONE
))
345 crypto_alg_tested(larval
->alg
.cra_driver_name
, 0);
348 err
= wait_for_completion_killable(&larval
->completion
);
352 crypto_larval_kill(&larval
->alg
);
355 int crypto_register_alg(struct crypto_alg
*alg
)
357 struct crypto_larval
*larval
;
360 alg
->cra_flags
&= ~CRYPTO_ALG_DEAD
;
361 err
= crypto_check_alg(alg
);
365 down_write(&crypto_alg_sem
);
366 larval
= __crypto_register_alg(alg
);
367 up_write(&crypto_alg_sem
);
370 return PTR_ERR(larval
);
372 crypto_wait_for_test(larval
);
375 EXPORT_SYMBOL_GPL(crypto_register_alg
);
377 static int crypto_remove_alg(struct crypto_alg
*alg
, struct list_head
*list
)
379 if (unlikely(list_empty(&alg
->cra_list
)))
382 alg
->cra_flags
|= CRYPTO_ALG_DEAD
;
384 crypto_notify(CRYPTO_MSG_ALG_UNREGISTER
, alg
);
385 list_del_init(&alg
->cra_list
);
386 crypto_remove_spawns(alg
, list
, NULL
);
391 int crypto_unregister_alg(struct crypto_alg
*alg
)
396 down_write(&crypto_alg_sem
);
397 ret
= crypto_remove_alg(alg
, &list
);
398 up_write(&crypto_alg_sem
);
403 BUG_ON(atomic_read(&alg
->cra_refcnt
) != 1);
404 if (alg
->cra_destroy
)
405 alg
->cra_destroy(alg
);
407 crypto_remove_final(&list
);
410 EXPORT_SYMBOL_GPL(crypto_unregister_alg
);
412 int crypto_register_algs(struct crypto_alg
*algs
, int count
)
416 for (i
= 0; i
< count
; i
++) {
417 ret
= crypto_register_alg(&algs
[i
]);
425 for (--i
; i
>= 0; --i
)
426 crypto_unregister_alg(&algs
[i
]);
430 EXPORT_SYMBOL_GPL(crypto_register_algs
);
432 int crypto_unregister_algs(struct crypto_alg
*algs
, int count
)
436 for (i
= 0; i
< count
; i
++) {
437 ret
= crypto_unregister_alg(&algs
[i
]);
439 pr_err("Failed to unregister %s %s: %d\n",
440 algs
[i
].cra_driver_name
, algs
[i
].cra_name
, ret
);
445 EXPORT_SYMBOL_GPL(crypto_unregister_algs
);
447 int crypto_register_template(struct crypto_template
*tmpl
)
449 struct crypto_template
*q
;
452 down_write(&crypto_alg_sem
);
454 crypto_check_module_sig(tmpl
->module
);
456 list_for_each_entry(q
, &crypto_template_list
, list
) {
461 list_add(&tmpl
->list
, &crypto_template_list
);
462 crypto_notify(CRYPTO_MSG_TMPL_REGISTER
, tmpl
);
465 up_write(&crypto_alg_sem
);
468 EXPORT_SYMBOL_GPL(crypto_register_template
);
470 void crypto_unregister_template(struct crypto_template
*tmpl
)
472 struct crypto_instance
*inst
;
473 struct hlist_node
*n
;
474 struct hlist_head
*list
;
477 down_write(&crypto_alg_sem
);
479 BUG_ON(list_empty(&tmpl
->list
));
480 list_del_init(&tmpl
->list
);
482 list
= &tmpl
->instances
;
483 hlist_for_each_entry(inst
, list
, list
) {
484 int err
= crypto_remove_alg(&inst
->alg
, &users
);
489 crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER
, tmpl
);
491 up_write(&crypto_alg_sem
);
493 hlist_for_each_entry_safe(inst
, n
, list
, list
) {
494 BUG_ON(atomic_read(&inst
->alg
.cra_refcnt
) != 1);
495 crypto_free_instance(inst
);
497 crypto_remove_final(&users
);
499 EXPORT_SYMBOL_GPL(crypto_unregister_template
);
501 static struct crypto_template
*__crypto_lookup_template(const char *name
)
503 struct crypto_template
*q
, *tmpl
= NULL
;
505 down_read(&crypto_alg_sem
);
506 list_for_each_entry(q
, &crypto_template_list
, list
) {
507 if (strcmp(q
->name
, name
))
509 if (unlikely(!crypto_tmpl_get(q
)))
515 up_read(&crypto_alg_sem
);
520 struct crypto_template
*crypto_lookup_template(const char *name
)
522 return try_then_request_module(__crypto_lookup_template(name
),
525 EXPORT_SYMBOL_GPL(crypto_lookup_template
);
527 int crypto_register_instance(struct crypto_template
*tmpl
,
528 struct crypto_instance
*inst
)
530 struct crypto_larval
*larval
;
533 err
= crypto_check_alg(&inst
->alg
);
537 inst
->alg
.cra_module
= tmpl
->module
;
538 inst
->alg
.cra_flags
|= CRYPTO_ALG_INSTANCE
;
540 if (unlikely(!crypto_mod_get(&inst
->alg
)))
543 down_write(&crypto_alg_sem
);
545 larval
= __crypto_register_alg(&inst
->alg
);
549 hlist_add_head(&inst
->list
, &tmpl
->instances
);
553 up_write(&crypto_alg_sem
);
555 err
= PTR_ERR(larval
);
559 crypto_wait_for_test(larval
);
561 /* Remove instance if test failed */
562 if (!(inst
->alg
.cra_flags
& CRYPTO_ALG_TESTED
))
563 crypto_unregister_instance(inst
);
567 crypto_mod_put(&inst
->alg
);
570 EXPORT_SYMBOL_GPL(crypto_register_instance
);
572 int crypto_unregister_instance(struct crypto_instance
*inst
)
576 down_write(&crypto_alg_sem
);
578 crypto_remove_spawns(&inst
->alg
, &list
, NULL
);
579 crypto_remove_instance(inst
, &list
);
581 up_write(&crypto_alg_sem
);
583 crypto_remove_final(&list
);
587 EXPORT_SYMBOL_GPL(crypto_unregister_instance
);
589 int crypto_init_spawn(struct crypto_spawn
*spawn
, struct crypto_alg
*alg
,
590 struct crypto_instance
*inst
, u32 mask
)
597 down_write(&crypto_alg_sem
);
598 if (!crypto_is_moribund(alg
)) {
599 list_add(&spawn
->list
, &alg
->cra_users
);
603 up_write(&crypto_alg_sem
);
607 EXPORT_SYMBOL_GPL(crypto_init_spawn
);
609 int crypto_init_spawn2(struct crypto_spawn
*spawn
, struct crypto_alg
*alg
,
610 struct crypto_instance
*inst
,
611 const struct crypto_type
*frontend
)
615 if ((alg
->cra_flags
^ frontend
->type
) & frontend
->maskset
)
618 spawn
->frontend
= frontend
;
619 err
= crypto_init_spawn(spawn
, alg
, inst
, frontend
->maskset
);
624 EXPORT_SYMBOL_GPL(crypto_init_spawn2
);
626 int crypto_grab_spawn(struct crypto_spawn
*spawn
, const char *name
,
629 struct crypto_alg
*alg
;
632 alg
= crypto_find_alg(name
, spawn
->frontend
, type
, mask
);
636 err
= crypto_init_spawn(spawn
, alg
, spawn
->inst
, mask
);
640 EXPORT_SYMBOL_GPL(crypto_grab_spawn
);
642 void crypto_drop_spawn(struct crypto_spawn
*spawn
)
647 down_write(&crypto_alg_sem
);
648 list_del(&spawn
->list
);
649 up_write(&crypto_alg_sem
);
651 EXPORT_SYMBOL_GPL(crypto_drop_spawn
);
653 static struct crypto_alg
*crypto_spawn_alg(struct crypto_spawn
*spawn
)
655 struct crypto_alg
*alg
;
656 struct crypto_alg
*alg2
;
658 down_read(&crypto_alg_sem
);
662 alg2
= crypto_mod_get(alg2
);
663 up_read(&crypto_alg_sem
);
667 crypto_shoot_alg(alg
);
668 return ERR_PTR(-EAGAIN
);
674 struct crypto_tfm
*crypto_spawn_tfm(struct crypto_spawn
*spawn
, u32 type
,
677 struct crypto_alg
*alg
;
678 struct crypto_tfm
*tfm
;
680 alg
= crypto_spawn_alg(spawn
);
682 return ERR_CAST(alg
);
684 tfm
= ERR_PTR(-EINVAL
);
685 if (unlikely((alg
->cra_flags
^ type
) & mask
))
688 tfm
= __crypto_alloc_tfm(alg
, type
, mask
);
698 EXPORT_SYMBOL_GPL(crypto_spawn_tfm
);
700 void *crypto_spawn_tfm2(struct crypto_spawn
*spawn
)
702 struct crypto_alg
*alg
;
703 struct crypto_tfm
*tfm
;
705 alg
= crypto_spawn_alg(spawn
);
707 return ERR_CAST(alg
);
709 tfm
= crypto_create_tfm(alg
, spawn
->frontend
);
719 EXPORT_SYMBOL_GPL(crypto_spawn_tfm2
);
721 int crypto_register_notifier(struct notifier_block
*nb
)
723 return blocking_notifier_chain_register(&crypto_chain
, nb
);
725 EXPORT_SYMBOL_GPL(crypto_register_notifier
);
727 int crypto_unregister_notifier(struct notifier_block
*nb
)
729 return blocking_notifier_chain_unregister(&crypto_chain
, nb
);
731 EXPORT_SYMBOL_GPL(crypto_unregister_notifier
);
733 struct crypto_attr_type
*crypto_get_attr_type(struct rtattr
**tb
)
735 struct rtattr
*rta
= tb
[0];
736 struct crypto_attr_type
*algt
;
739 return ERR_PTR(-ENOENT
);
740 if (RTA_PAYLOAD(rta
) < sizeof(*algt
))
741 return ERR_PTR(-EINVAL
);
742 if (rta
->rta_type
!= CRYPTOA_TYPE
)
743 return ERR_PTR(-EINVAL
);
745 algt
= RTA_DATA(rta
);
749 EXPORT_SYMBOL_GPL(crypto_get_attr_type
);
751 int crypto_check_attr_type(struct rtattr
**tb
, u32 type
)
753 struct crypto_attr_type
*algt
;
755 algt
= crypto_get_attr_type(tb
);
757 return PTR_ERR(algt
);
759 if ((algt
->type
^ type
) & algt
->mask
)
764 EXPORT_SYMBOL_GPL(crypto_check_attr_type
);
766 const char *crypto_attr_alg_name(struct rtattr
*rta
)
768 struct crypto_attr_alg
*alga
;
771 return ERR_PTR(-ENOENT
);
772 if (RTA_PAYLOAD(rta
) < sizeof(*alga
))
773 return ERR_PTR(-EINVAL
);
774 if (rta
->rta_type
!= CRYPTOA_ALG
)
775 return ERR_PTR(-EINVAL
);
777 alga
= RTA_DATA(rta
);
778 alga
->name
[CRYPTO_MAX_ALG_NAME
- 1] = 0;
782 EXPORT_SYMBOL_GPL(crypto_attr_alg_name
);
784 struct crypto_alg
*crypto_attr_alg2(struct rtattr
*rta
,
785 const struct crypto_type
*frontend
,
790 name
= crypto_attr_alg_name(rta
);
792 return ERR_CAST(name
);
794 return crypto_find_alg(name
, frontend
, type
, mask
);
796 EXPORT_SYMBOL_GPL(crypto_attr_alg2
);
798 int crypto_attr_u32(struct rtattr
*rta
, u32
*num
)
800 struct crypto_attr_u32
*nu32
;
804 if (RTA_PAYLOAD(rta
) < sizeof(*nu32
))
806 if (rta
->rta_type
!= CRYPTOA_U32
)
809 nu32
= RTA_DATA(rta
);
814 EXPORT_SYMBOL_GPL(crypto_attr_u32
);
816 void *crypto_alloc_instance2(const char *name
, struct crypto_alg
*alg
,
819 struct crypto_instance
*inst
;
823 p
= kzalloc(head
+ sizeof(*inst
) + sizeof(struct crypto_spawn
),
826 return ERR_PTR(-ENOMEM
);
828 inst
= (void *)(p
+ head
);
831 if (snprintf(inst
->alg
.cra_name
, CRYPTO_MAX_ALG_NAME
, "%s(%s)", name
,
832 alg
->cra_name
) >= CRYPTO_MAX_ALG_NAME
)
835 if (snprintf(inst
->alg
.cra_driver_name
, CRYPTO_MAX_ALG_NAME
, "%s(%s)",
836 name
, alg
->cra_driver_name
) >= CRYPTO_MAX_ALG_NAME
)
845 EXPORT_SYMBOL_GPL(crypto_alloc_instance2
);
847 struct crypto_instance
*crypto_alloc_instance(const char *name
,
848 struct crypto_alg
*alg
)
850 struct crypto_instance
*inst
;
851 struct crypto_spawn
*spawn
;
854 inst
= crypto_alloc_instance2(name
, alg
, 0);
858 spawn
= crypto_instance_ctx(inst
);
859 err
= crypto_init_spawn(spawn
, alg
, inst
,
860 CRYPTO_ALG_TYPE_MASK
| CRYPTO_ALG_ASYNC
);
874 EXPORT_SYMBOL_GPL(crypto_alloc_instance
);
876 void crypto_init_queue(struct crypto_queue
*queue
, unsigned int max_qlen
)
878 INIT_LIST_HEAD(&queue
->list
);
879 queue
->backlog
= &queue
->list
;
881 queue
->max_qlen
= max_qlen
;
883 EXPORT_SYMBOL_GPL(crypto_init_queue
);
885 int crypto_enqueue_request(struct crypto_queue
*queue
,
886 struct crypto_async_request
*request
)
888 int err
= -EINPROGRESS
;
890 if (unlikely(queue
->qlen
>= queue
->max_qlen
)) {
892 if (!(request
->flags
& CRYPTO_TFM_REQ_MAY_BACKLOG
))
894 if (queue
->backlog
== &queue
->list
)
895 queue
->backlog
= &request
->list
;
899 list_add_tail(&request
->list
, &queue
->list
);
904 EXPORT_SYMBOL_GPL(crypto_enqueue_request
);
906 struct crypto_async_request
*crypto_dequeue_request(struct crypto_queue
*queue
)
908 struct list_head
*request
;
910 if (unlikely(!queue
->qlen
))
915 if (queue
->backlog
!= &queue
->list
)
916 queue
->backlog
= queue
->backlog
->next
;
918 request
= queue
->list
.next
;
921 return list_entry(request
, struct crypto_async_request
, list
);
923 EXPORT_SYMBOL_GPL(crypto_dequeue_request
);
925 int crypto_tfm_in_queue(struct crypto_queue
*queue
, struct crypto_tfm
*tfm
)
927 struct crypto_async_request
*req
;
929 list_for_each_entry(req
, &queue
->list
, list
) {
936 EXPORT_SYMBOL_GPL(crypto_tfm_in_queue
);
938 static inline void crypto_inc_byte(u8
*a
, unsigned int size
)
943 for (; size
; size
--) {
951 void crypto_inc(u8
*a
, unsigned int size
)
953 __be32
*b
= (__be32
*)(a
+ size
);
956 for (; size
>= 4; size
-= 4) {
957 c
= be32_to_cpu(*--b
) + 1;
963 crypto_inc_byte(a
, size
);
965 EXPORT_SYMBOL_GPL(crypto_inc
);
967 static inline void crypto_xor_byte(u8
*a
, const u8
*b
, unsigned int size
)
973 void crypto_xor(u8
*dst
, const u8
*src
, unsigned int size
)
978 for (; size
>= 4; size
-= 4)
981 crypto_xor_byte((u8
*)a
, (u8
*)b
, size
);
983 EXPORT_SYMBOL_GPL(crypto_xor
);
985 unsigned int crypto_alg_extsize(struct crypto_alg
*alg
)
987 return alg
->cra_ctxsize
+
988 (alg
->cra_alignmask
& ~(crypto_tfm_ctx_alignment() - 1));
990 EXPORT_SYMBOL_GPL(crypto_alg_extsize
);
992 static int __init
crypto_algapi_init(void)
998 static void __exit
crypto_algapi_exit(void)
1003 module_init(crypto_algapi_init
);
1004 module_exit(crypto_algapi_exit
);
1006 MODULE_LICENSE("GPL");
1007 MODULE_DESCRIPTION("Cryptographic algorithms API");