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 spawn
= list_first_entry_or_null(stack
, struct crypto_spawn
, list
);
100 n
= list_next_entry(spawn
, list
);
102 if (spawn
->alg
&& &n
->list
!= stack
&& !n
->alg
)
103 n
->alg
= (n
->list
.next
== stack
) ? alg
:
104 &list_next_entry(n
, list
)->inst
->alg
;
106 list_move(&spawn
->list
, secondary_spawns
);
108 return &n
->list
== stack
? top
: &n
->inst
->alg
.cra_users
;
111 static void crypto_remove_instance(struct crypto_instance
*inst
,
112 struct list_head
*list
)
114 struct crypto_template
*tmpl
= inst
->tmpl
;
116 if (crypto_is_dead(&inst
->alg
))
119 inst
->alg
.cra_flags
|= CRYPTO_ALG_DEAD
;
120 if (hlist_unhashed(&inst
->list
))
123 if (!tmpl
|| !crypto_tmpl_get(tmpl
))
126 crypto_notify(CRYPTO_MSG_ALG_UNREGISTER
, &inst
->alg
);
127 list_move(&inst
->alg
.cra_list
, list
);
128 hlist_del(&inst
->list
);
129 inst
->alg
.cra_destroy
= crypto_destroy_instance
;
131 BUG_ON(!list_empty(&inst
->alg
.cra_users
));
134 void crypto_remove_spawns(struct crypto_alg
*alg
, struct list_head
*list
,
135 struct crypto_alg
*nalg
)
137 u32 new_type
= (nalg
?: alg
)->cra_flags
;
138 struct crypto_spawn
*spawn
, *n
;
139 LIST_HEAD(secondary_spawns
);
140 struct list_head
*spawns
;
144 spawns
= &alg
->cra_users
;
145 list_for_each_entry_safe(spawn
, n
, spawns
, list
) {
146 if ((spawn
->alg
->cra_flags
^ new_type
) & spawn
->mask
)
149 list_move(&spawn
->list
, &top
);
154 while (!list_empty(spawns
)) {
155 struct crypto_instance
*inst
;
157 spawn
= list_first_entry(spawns
, struct crypto_spawn
,
161 BUG_ON(&inst
->alg
== alg
);
163 list_move(&spawn
->list
, &stack
);
165 if (&inst
->alg
== nalg
)
169 spawns
= &inst
->alg
.cra_users
;
171 } while ((spawns
= crypto_more_spawns(alg
, &stack
, &top
,
172 &secondary_spawns
)));
174 list_for_each_entry_safe(spawn
, n
, &secondary_spawns
, list
) {
176 list_move(&spawn
->list
, &spawn
->alg
->cra_users
);
178 crypto_remove_instance(spawn
->inst
, list
);
181 EXPORT_SYMBOL_GPL(crypto_remove_spawns
);
183 static struct crypto_larval
*__crypto_register_alg(struct crypto_alg
*alg
)
185 struct crypto_alg
*q
;
186 struct crypto_larval
*larval
;
189 if (crypto_is_dead(alg
))
192 INIT_LIST_HEAD(&alg
->cra_users
);
195 alg
->cra_flags
&= ~CRYPTO_ALG_TESTED
;
199 list_for_each_entry(q
, &crypto_alg_list
, cra_list
) {
203 if (crypto_is_moribund(q
))
206 if (crypto_is_larval(q
)) {
207 if (!strcmp(alg
->cra_driver_name
, q
->cra_driver_name
))
212 if (!strcmp(q
->cra_driver_name
, alg
->cra_name
) ||
213 !strcmp(q
->cra_name
, alg
->cra_driver_name
))
217 larval
= crypto_larval_alloc(alg
->cra_name
,
218 alg
->cra_flags
| CRYPTO_ALG_TESTED
, 0);
223 larval
->adult
= crypto_mod_get(alg
);
227 atomic_set(&larval
->alg
.cra_refcnt
, 1);
228 memcpy(larval
->alg
.cra_driver_name
, alg
->cra_driver_name
,
229 CRYPTO_MAX_ALG_NAME
);
230 larval
->alg
.cra_priority
= alg
->cra_priority
;
232 list_add(&alg
->cra_list
, &crypto_alg_list
);
233 list_add(&larval
->alg
.cra_list
, &crypto_alg_list
);
241 larval
= ERR_PTR(ret
);
245 void crypto_alg_tested(const char *name
, int err
)
247 struct crypto_larval
*test
;
248 struct crypto_alg
*alg
;
249 struct crypto_alg
*q
;
252 down_write(&crypto_alg_sem
);
253 list_for_each_entry(q
, &crypto_alg_list
, cra_list
) {
254 if (crypto_is_moribund(q
) || !crypto_is_larval(q
))
257 test
= (struct crypto_larval
*)q
;
259 if (!strcmp(q
->cra_driver_name
, name
))
263 printk(KERN_ERR
"alg: Unexpected test result for %s: %d\n", name
, err
);
267 q
->cra_flags
|= CRYPTO_ALG_DEAD
;
269 if (err
|| list_empty(&alg
->cra_list
))
272 alg
->cra_flags
|= CRYPTO_ALG_TESTED
;
274 list_for_each_entry(q
, &crypto_alg_list
, cra_list
) {
278 if (crypto_is_moribund(q
))
281 if (crypto_is_larval(q
)) {
282 struct crypto_larval
*larval
= (void *)q
;
285 * Check to see if either our generic name or
286 * specific name can satisfy the name requested
287 * by the larval entry q.
289 if (strcmp(alg
->cra_name
, q
->cra_name
) &&
290 strcmp(alg
->cra_driver_name
, q
->cra_name
))
295 if ((q
->cra_flags
^ alg
->cra_flags
) & larval
->mask
)
297 if (!crypto_mod_get(alg
))
304 if (strcmp(alg
->cra_name
, q
->cra_name
))
307 if (strcmp(alg
->cra_driver_name
, q
->cra_driver_name
) &&
308 q
->cra_priority
> alg
->cra_priority
)
311 crypto_remove_spawns(q
, &list
, alg
);
315 complete_all(&test
->completion
);
318 up_write(&crypto_alg_sem
);
320 crypto_remove_final(&list
);
322 EXPORT_SYMBOL_GPL(crypto_alg_tested
);
324 void crypto_remove_final(struct list_head
*list
)
326 struct crypto_alg
*alg
;
327 struct crypto_alg
*n
;
329 list_for_each_entry_safe(alg
, n
, list
, cra_list
) {
330 list_del_init(&alg
->cra_list
);
334 EXPORT_SYMBOL_GPL(crypto_remove_final
);
336 static void crypto_wait_for_test(struct crypto_larval
*larval
)
340 err
= crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER
, larval
->adult
);
341 if (err
!= NOTIFY_STOP
) {
342 if (WARN_ON(err
!= NOTIFY_DONE
))
344 crypto_alg_tested(larval
->alg
.cra_driver_name
, 0);
347 err
= wait_for_completion_killable(&larval
->completion
);
351 crypto_larval_kill(&larval
->alg
);
354 int crypto_register_alg(struct crypto_alg
*alg
)
356 struct crypto_larval
*larval
;
359 err
= crypto_check_alg(alg
);
363 down_write(&crypto_alg_sem
);
364 larval
= __crypto_register_alg(alg
);
365 up_write(&crypto_alg_sem
);
368 return PTR_ERR(larval
);
370 crypto_wait_for_test(larval
);
373 EXPORT_SYMBOL_GPL(crypto_register_alg
);
375 static int crypto_remove_alg(struct crypto_alg
*alg
, struct list_head
*list
)
377 if (unlikely(list_empty(&alg
->cra_list
)))
380 alg
->cra_flags
|= CRYPTO_ALG_DEAD
;
382 crypto_notify(CRYPTO_MSG_ALG_UNREGISTER
, alg
);
383 list_del_init(&alg
->cra_list
);
384 crypto_remove_spawns(alg
, list
, NULL
);
389 int crypto_unregister_alg(struct crypto_alg
*alg
)
394 down_write(&crypto_alg_sem
);
395 ret
= crypto_remove_alg(alg
, &list
);
396 up_write(&crypto_alg_sem
);
401 BUG_ON(atomic_read(&alg
->cra_refcnt
) != 1);
402 if (alg
->cra_destroy
)
403 alg
->cra_destroy(alg
);
405 crypto_remove_final(&list
);
408 EXPORT_SYMBOL_GPL(crypto_unregister_alg
);
410 int crypto_register_algs(struct crypto_alg
*algs
, int count
)
414 for (i
= 0; i
< count
; i
++) {
415 ret
= crypto_register_alg(&algs
[i
]);
423 for (--i
; i
>= 0; --i
)
424 crypto_unregister_alg(&algs
[i
]);
428 EXPORT_SYMBOL_GPL(crypto_register_algs
);
430 int crypto_unregister_algs(struct crypto_alg
*algs
, int count
)
434 for (i
= 0; i
< count
; i
++) {
435 ret
= crypto_unregister_alg(&algs
[i
]);
437 pr_err("Failed to unregister %s %s: %d\n",
438 algs
[i
].cra_driver_name
, algs
[i
].cra_name
, ret
);
443 EXPORT_SYMBOL_GPL(crypto_unregister_algs
);
445 int crypto_register_template(struct crypto_template
*tmpl
)
447 struct crypto_template
*q
;
450 down_write(&crypto_alg_sem
);
452 crypto_check_module_sig(tmpl
->module
);
454 list_for_each_entry(q
, &crypto_template_list
, list
) {
459 list_add(&tmpl
->list
, &crypto_template_list
);
460 crypto_notify(CRYPTO_MSG_TMPL_REGISTER
, tmpl
);
463 up_write(&crypto_alg_sem
);
466 EXPORT_SYMBOL_GPL(crypto_register_template
);
468 void crypto_unregister_template(struct crypto_template
*tmpl
)
470 struct crypto_instance
*inst
;
471 struct hlist_node
*n
;
472 struct hlist_head
*list
;
475 down_write(&crypto_alg_sem
);
477 BUG_ON(list_empty(&tmpl
->list
));
478 list_del_init(&tmpl
->list
);
480 list
= &tmpl
->instances
;
481 hlist_for_each_entry(inst
, list
, list
) {
482 int err
= crypto_remove_alg(&inst
->alg
, &users
);
487 crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER
, tmpl
);
489 up_write(&crypto_alg_sem
);
491 hlist_for_each_entry_safe(inst
, n
, list
, list
) {
492 BUG_ON(atomic_read(&inst
->alg
.cra_refcnt
) != 1);
493 crypto_free_instance(inst
);
495 crypto_remove_final(&users
);
497 EXPORT_SYMBOL_GPL(crypto_unregister_template
);
499 static struct crypto_template
*__crypto_lookup_template(const char *name
)
501 struct crypto_template
*q
, *tmpl
= NULL
;
503 down_read(&crypto_alg_sem
);
504 list_for_each_entry(q
, &crypto_template_list
, list
) {
505 if (strcmp(q
->name
, name
))
507 if (unlikely(!crypto_tmpl_get(q
)))
513 up_read(&crypto_alg_sem
);
518 struct crypto_template
*crypto_lookup_template(const char *name
)
520 return try_then_request_module(__crypto_lookup_template(name
),
523 EXPORT_SYMBOL_GPL(crypto_lookup_template
);
525 int crypto_register_instance(struct crypto_template
*tmpl
,
526 struct crypto_instance
*inst
)
528 struct crypto_larval
*larval
;
531 err
= crypto_check_alg(&inst
->alg
);
535 inst
->alg
.cra_module
= tmpl
->module
;
536 inst
->alg
.cra_flags
|= CRYPTO_ALG_INSTANCE
;
538 if (unlikely(!crypto_mod_get(&inst
->alg
)))
541 down_write(&crypto_alg_sem
);
543 larval
= __crypto_register_alg(&inst
->alg
);
547 hlist_add_head(&inst
->list
, &tmpl
->instances
);
551 up_write(&crypto_alg_sem
);
553 err
= PTR_ERR(larval
);
557 crypto_wait_for_test(larval
);
559 /* Remove instance if test failed */
560 if (!(inst
->alg
.cra_flags
& CRYPTO_ALG_TESTED
))
561 crypto_unregister_instance(inst
);
565 crypto_mod_put(&inst
->alg
);
568 EXPORT_SYMBOL_GPL(crypto_register_instance
);
570 int crypto_unregister_instance(struct crypto_instance
*inst
)
574 down_write(&crypto_alg_sem
);
576 crypto_remove_spawns(&inst
->alg
, &list
, NULL
);
577 crypto_remove_instance(inst
, &list
);
579 up_write(&crypto_alg_sem
);
581 crypto_remove_final(&list
);
585 EXPORT_SYMBOL_GPL(crypto_unregister_instance
);
587 int crypto_init_spawn(struct crypto_spawn
*spawn
, struct crypto_alg
*alg
,
588 struct crypto_instance
*inst
, u32 mask
)
595 down_write(&crypto_alg_sem
);
596 if (!crypto_is_moribund(alg
)) {
597 list_add(&spawn
->list
, &alg
->cra_users
);
601 up_write(&crypto_alg_sem
);
605 EXPORT_SYMBOL_GPL(crypto_init_spawn
);
607 int crypto_init_spawn2(struct crypto_spawn
*spawn
, struct crypto_alg
*alg
,
608 struct crypto_instance
*inst
,
609 const struct crypto_type
*frontend
)
613 if ((alg
->cra_flags
^ frontend
->type
) & frontend
->maskset
)
616 spawn
->frontend
= frontend
;
617 err
= crypto_init_spawn(spawn
, alg
, inst
, frontend
->maskset
);
622 EXPORT_SYMBOL_GPL(crypto_init_spawn2
);
624 int crypto_grab_spawn(struct crypto_spawn
*spawn
, const char *name
,
627 struct crypto_alg
*alg
;
630 alg
= crypto_find_alg(name
, spawn
->frontend
, type
, mask
);
634 err
= crypto_init_spawn(spawn
, alg
, spawn
->inst
, mask
);
638 EXPORT_SYMBOL_GPL(crypto_grab_spawn
);
640 void crypto_drop_spawn(struct crypto_spawn
*spawn
)
645 down_write(&crypto_alg_sem
);
646 list_del(&spawn
->list
);
647 up_write(&crypto_alg_sem
);
649 EXPORT_SYMBOL_GPL(crypto_drop_spawn
);
651 static struct crypto_alg
*crypto_spawn_alg(struct crypto_spawn
*spawn
)
653 struct crypto_alg
*alg
;
654 struct crypto_alg
*alg2
;
656 down_read(&crypto_alg_sem
);
660 alg2
= crypto_mod_get(alg2
);
661 up_read(&crypto_alg_sem
);
665 crypto_shoot_alg(alg
);
666 return ERR_PTR(-EAGAIN
);
672 struct crypto_tfm
*crypto_spawn_tfm(struct crypto_spawn
*spawn
, u32 type
,
675 struct crypto_alg
*alg
;
676 struct crypto_tfm
*tfm
;
678 alg
= crypto_spawn_alg(spawn
);
680 return ERR_CAST(alg
);
682 tfm
= ERR_PTR(-EINVAL
);
683 if (unlikely((alg
->cra_flags
^ type
) & mask
))
686 tfm
= __crypto_alloc_tfm(alg
, type
, mask
);
696 EXPORT_SYMBOL_GPL(crypto_spawn_tfm
);
698 void *crypto_spawn_tfm2(struct crypto_spawn
*spawn
)
700 struct crypto_alg
*alg
;
701 struct crypto_tfm
*tfm
;
703 alg
= crypto_spawn_alg(spawn
);
705 return ERR_CAST(alg
);
707 tfm
= crypto_create_tfm(alg
, spawn
->frontend
);
717 EXPORT_SYMBOL_GPL(crypto_spawn_tfm2
);
719 int crypto_register_notifier(struct notifier_block
*nb
)
721 return blocking_notifier_chain_register(&crypto_chain
, nb
);
723 EXPORT_SYMBOL_GPL(crypto_register_notifier
);
725 int crypto_unregister_notifier(struct notifier_block
*nb
)
727 return blocking_notifier_chain_unregister(&crypto_chain
, nb
);
729 EXPORT_SYMBOL_GPL(crypto_unregister_notifier
);
731 struct crypto_attr_type
*crypto_get_attr_type(struct rtattr
**tb
)
733 struct rtattr
*rta
= tb
[0];
734 struct crypto_attr_type
*algt
;
737 return ERR_PTR(-ENOENT
);
738 if (RTA_PAYLOAD(rta
) < sizeof(*algt
))
739 return ERR_PTR(-EINVAL
);
740 if (rta
->rta_type
!= CRYPTOA_TYPE
)
741 return ERR_PTR(-EINVAL
);
743 algt
= RTA_DATA(rta
);
747 EXPORT_SYMBOL_GPL(crypto_get_attr_type
);
749 int crypto_check_attr_type(struct rtattr
**tb
, u32 type
)
751 struct crypto_attr_type
*algt
;
753 algt
= crypto_get_attr_type(tb
);
755 return PTR_ERR(algt
);
757 if ((algt
->type
^ type
) & algt
->mask
)
762 EXPORT_SYMBOL_GPL(crypto_check_attr_type
);
764 const char *crypto_attr_alg_name(struct rtattr
*rta
)
766 struct crypto_attr_alg
*alga
;
769 return ERR_PTR(-ENOENT
);
770 if (RTA_PAYLOAD(rta
) < sizeof(*alga
))
771 return ERR_PTR(-EINVAL
);
772 if (rta
->rta_type
!= CRYPTOA_ALG
)
773 return ERR_PTR(-EINVAL
);
775 alga
= RTA_DATA(rta
);
776 alga
->name
[CRYPTO_MAX_ALG_NAME
- 1] = 0;
780 EXPORT_SYMBOL_GPL(crypto_attr_alg_name
);
782 struct crypto_alg
*crypto_attr_alg2(struct rtattr
*rta
,
783 const struct crypto_type
*frontend
,
788 name
= crypto_attr_alg_name(rta
);
790 return ERR_CAST(name
);
792 return crypto_find_alg(name
, frontend
, type
, mask
);
794 EXPORT_SYMBOL_GPL(crypto_attr_alg2
);
796 int crypto_attr_u32(struct rtattr
*rta
, u32
*num
)
798 struct crypto_attr_u32
*nu32
;
802 if (RTA_PAYLOAD(rta
) < sizeof(*nu32
))
804 if (rta
->rta_type
!= CRYPTOA_U32
)
807 nu32
= RTA_DATA(rta
);
812 EXPORT_SYMBOL_GPL(crypto_attr_u32
);
814 int crypto_inst_setname(struct crypto_instance
*inst
, const char *name
,
815 struct crypto_alg
*alg
)
817 if (snprintf(inst
->alg
.cra_name
, CRYPTO_MAX_ALG_NAME
, "%s(%s)", name
,
818 alg
->cra_name
) >= CRYPTO_MAX_ALG_NAME
)
819 return -ENAMETOOLONG
;
821 if (snprintf(inst
->alg
.cra_driver_name
, CRYPTO_MAX_ALG_NAME
, "%s(%s)",
822 name
, alg
->cra_driver_name
) >= CRYPTO_MAX_ALG_NAME
)
823 return -ENAMETOOLONG
;
827 EXPORT_SYMBOL_GPL(crypto_inst_setname
);
829 void *crypto_alloc_instance2(const char *name
, struct crypto_alg
*alg
,
832 struct crypto_instance
*inst
;
836 p
= kzalloc(head
+ sizeof(*inst
) + sizeof(struct crypto_spawn
),
839 return ERR_PTR(-ENOMEM
);
841 inst
= (void *)(p
+ head
);
843 err
= crypto_inst_setname(inst
, name
, alg
);
853 EXPORT_SYMBOL_GPL(crypto_alloc_instance2
);
855 struct crypto_instance
*crypto_alloc_instance(const char *name
,
856 struct crypto_alg
*alg
)
858 struct crypto_instance
*inst
;
859 struct crypto_spawn
*spawn
;
862 inst
= crypto_alloc_instance2(name
, alg
, 0);
866 spawn
= crypto_instance_ctx(inst
);
867 err
= crypto_init_spawn(spawn
, alg
, inst
,
868 CRYPTO_ALG_TYPE_MASK
| CRYPTO_ALG_ASYNC
);
882 EXPORT_SYMBOL_GPL(crypto_alloc_instance
);
884 void crypto_init_queue(struct crypto_queue
*queue
, unsigned int max_qlen
)
886 INIT_LIST_HEAD(&queue
->list
);
887 queue
->backlog
= &queue
->list
;
889 queue
->max_qlen
= max_qlen
;
891 EXPORT_SYMBOL_GPL(crypto_init_queue
);
893 int crypto_enqueue_request(struct crypto_queue
*queue
,
894 struct crypto_async_request
*request
)
896 int err
= -EINPROGRESS
;
898 if (unlikely(queue
->qlen
>= queue
->max_qlen
)) {
900 if (!(request
->flags
& CRYPTO_TFM_REQ_MAY_BACKLOG
))
902 if (queue
->backlog
== &queue
->list
)
903 queue
->backlog
= &request
->list
;
907 list_add_tail(&request
->list
, &queue
->list
);
912 EXPORT_SYMBOL_GPL(crypto_enqueue_request
);
914 struct crypto_async_request
*crypto_dequeue_request(struct crypto_queue
*queue
)
916 struct list_head
*request
;
918 if (unlikely(!queue
->qlen
))
923 if (queue
->backlog
!= &queue
->list
)
924 queue
->backlog
= queue
->backlog
->next
;
926 request
= queue
->list
.next
;
929 return list_entry(request
, struct crypto_async_request
, list
);
931 EXPORT_SYMBOL_GPL(crypto_dequeue_request
);
933 int crypto_tfm_in_queue(struct crypto_queue
*queue
, struct crypto_tfm
*tfm
)
935 struct crypto_async_request
*req
;
937 list_for_each_entry(req
, &queue
->list
, list
) {
944 EXPORT_SYMBOL_GPL(crypto_tfm_in_queue
);
946 static inline void crypto_inc_byte(u8
*a
, unsigned int size
)
951 for (; size
; size
--) {
959 void crypto_inc(u8
*a
, unsigned int size
)
961 __be32
*b
= (__be32
*)(a
+ size
);
964 for (; size
>= 4; size
-= 4) {
965 c
= be32_to_cpu(*--b
) + 1;
971 crypto_inc_byte(a
, size
);
973 EXPORT_SYMBOL_GPL(crypto_inc
);
975 static inline void crypto_xor_byte(u8
*a
, const u8
*b
, unsigned int size
)
981 void crypto_xor(u8
*dst
, const u8
*src
, unsigned int size
)
986 for (; size
>= 4; size
-= 4)
989 crypto_xor_byte((u8
*)a
, (u8
*)b
, size
);
991 EXPORT_SYMBOL_GPL(crypto_xor
);
993 unsigned int crypto_alg_extsize(struct crypto_alg
*alg
)
995 return alg
->cra_ctxsize
+
996 (alg
->cra_alignmask
& ~(crypto_tfm_ctx_alignment() - 1));
998 EXPORT_SYMBOL_GPL(crypto_alg_extsize
);
1000 int crypto_type_has_alg(const char *name
, const struct crypto_type
*frontend
,
1004 struct crypto_alg
*alg
= crypto_find_alg(name
, frontend
, type
, mask
);
1007 crypto_mod_put(alg
);
1013 EXPORT_SYMBOL_GPL(crypto_type_has_alg
);
1015 static int __init
crypto_algapi_init(void)
1021 static void __exit
crypto_algapi_exit(void)
1026 module_init(crypto_algapi_init
);
1027 module_exit(crypto_algapi_exit
);
1029 MODULE_LICENSE("GPL");
1030 MODULE_DESCRIPTION("Cryptographic algorithms API");