1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Cryptographic API for algorithms (i.e., low-level API).
5 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
8 #include <crypto/algapi.h>
9 #include <crypto/internal/simd.h>
10 #include <linux/err.h>
11 #include <linux/errno.h>
12 #include <linux/fips.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/list.h>
16 #include <linux/module.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/slab.h>
19 #include <linux/string.h>
23 static LIST_HEAD(crypto_template_list);
25 #ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
26 DEFINE_PER_CPU(bool, crypto_simd_disabled_for_test);
27 EXPORT_PER_CPU_SYMBOL_GPL(crypto_simd_disabled_for_test);
30 static inline void crypto_check_module_sig(struct module *mod)
32 if (fips_enabled && mod && !module_sig_ok(mod))
33 panic("Module %s signature verification failed in FIPS mode\n",
37 static int crypto_check_alg(struct crypto_alg *alg)
39 crypto_check_module_sig(alg->cra_module);
41 if (!alg->cra_name[0] || !alg->cra_driver_name[0])
44 if (alg->cra_alignmask & (alg->cra_alignmask + 1))
47 /* General maximums for all algs. */
48 if (alg->cra_alignmask > MAX_ALGAPI_ALIGNMASK)
51 if (alg->cra_blocksize > MAX_ALGAPI_BLOCKSIZE)
54 /* Lower maximums for specific alg types. */
55 if (!alg->cra_type && (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
56 CRYPTO_ALG_TYPE_CIPHER) {
57 if (alg->cra_alignmask > MAX_CIPHER_ALIGNMASK)
60 if (alg->cra_blocksize > MAX_CIPHER_BLOCKSIZE)
64 if (alg->cra_priority < 0)
67 refcount_set(&alg->cra_refcnt, 1);
72 static void crypto_free_instance(struct crypto_instance *inst)
74 inst->alg.cra_type->free(inst);
77 static void crypto_destroy_instance(struct crypto_alg *alg)
79 struct crypto_instance *inst = (void *)alg;
80 struct crypto_template *tmpl = inst->tmpl;
82 crypto_free_instance(inst);
83 crypto_tmpl_put(tmpl);
87 * This function adds a spawn to the list secondary_spawns which
88 * will be used at the end of crypto_remove_spawns to unregister
89 * instances, unless the spawn happens to be one that is depended
90 * on by the new algorithm (nalg in crypto_remove_spawns).
92 * This function is also responsible for resurrecting any algorithms
93 * in the dependency chain of nalg by unsetting n->dead.
95 static struct list_head *crypto_more_spawns(struct crypto_alg *alg,
96 struct list_head *stack,
97 struct list_head *top,
98 struct list_head *secondary_spawns)
100 struct crypto_spawn *spawn, *n;
102 spawn = list_first_entry_or_null(stack, struct crypto_spawn, list);
106 n = list_prev_entry(spawn, list);
107 list_move(&spawn->list, secondary_spawns);
109 if (list_is_last(&n->list, stack))
112 n = list_next_entry(n, list);
116 return &n->inst->alg.cra_users;
119 static void crypto_remove_instance(struct crypto_instance *inst,
120 struct list_head *list)
122 struct crypto_template *tmpl = inst->tmpl;
124 if (crypto_is_dead(&inst->alg))
127 inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
129 if (!tmpl || !crypto_tmpl_get(tmpl))
132 list_move(&inst->alg.cra_list, list);
133 hlist_del(&inst->list);
134 inst->alg.cra_destroy = crypto_destroy_instance;
136 BUG_ON(!list_empty(&inst->alg.cra_users));
140 * Given an algorithm alg, remove all algorithms that depend on it
141 * through spawns. If nalg is not null, then exempt any algorithms
142 * that is depended on by nalg. This is useful when nalg itself
145 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
146 struct crypto_alg *nalg)
148 u32 new_type = (nalg ?: alg)->cra_flags;
149 struct crypto_spawn *spawn, *n;
150 LIST_HEAD(secondary_spawns);
151 struct list_head *spawns;
155 spawns = &alg->cra_users;
156 list_for_each_entry_safe(spawn, n, spawns, list) {
157 if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
160 list_move(&spawn->list, &top);
164 * Perform a depth-first walk starting from alg through
165 * the cra_users tree. The list stack records the path
166 * from alg to the current spawn.
170 while (!list_empty(spawns)) {
171 struct crypto_instance *inst;
173 spawn = list_first_entry(spawns, struct crypto_spawn,
177 list_move(&spawn->list, &stack);
178 spawn->dead = !spawn->registered || &inst->alg != nalg;
180 if (!spawn->registered)
183 BUG_ON(&inst->alg == alg);
185 if (&inst->alg == nalg)
188 spawns = &inst->alg.cra_users;
191 * Even if spawn->registered is true, the
192 * instance itself may still be unregistered.
193 * This is because it may have failed during
194 * registration. Therefore we still need to
195 * make the following test.
197 * We may encounter an unregistered instance here, since
198 * an instance's spawns are set up prior to the instance
199 * being registered. An unregistered instance will have
200 * NULL ->cra_users.next, since ->cra_users isn't
201 * properly initialized until registration. But an
202 * unregistered instance cannot have any users, so treat
203 * it the same as ->cra_users being empty.
205 if (spawns->next == NULL)
208 } while ((spawns = crypto_more_spawns(alg, &stack, &top,
209 &secondary_spawns)));
212 * Remove all instances that are marked as dead. Also
213 * complete the resurrection of the others by moving them
214 * back to the cra_users list.
216 list_for_each_entry_safe(spawn, n, &secondary_spawns, list) {
218 list_move(&spawn->list, &spawn->alg->cra_users);
219 else if (spawn->registered)
220 crypto_remove_instance(spawn->inst, list);
223 EXPORT_SYMBOL_GPL(crypto_remove_spawns);
225 static struct crypto_larval *crypto_alloc_test_larval(struct crypto_alg *alg)
227 struct crypto_larval *larval;
229 if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER))
232 larval = crypto_larval_alloc(alg->cra_name,
233 alg->cra_flags | CRYPTO_ALG_TESTED, 0);
237 larval->adult = crypto_mod_get(alg);
238 if (!larval->adult) {
240 return ERR_PTR(-ENOENT);
243 refcount_set(&larval->alg.cra_refcnt, 1);
244 memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
245 CRYPTO_MAX_ALG_NAME);
246 larval->alg.cra_priority = alg->cra_priority;
251 static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
253 struct crypto_alg *q;
254 struct crypto_larval *larval;
257 if (crypto_is_dead(alg))
260 INIT_LIST_HEAD(&alg->cra_users);
263 alg->cra_flags &= ~CRYPTO_ALG_TESTED;
267 list_for_each_entry(q, &crypto_alg_list, cra_list) {
271 if (crypto_is_moribund(q))
274 if (crypto_is_larval(q)) {
275 if (!strcmp(alg->cra_driver_name, q->cra_driver_name))
280 if (!strcmp(q->cra_driver_name, alg->cra_name) ||
281 !strcmp(q->cra_name, alg->cra_driver_name))
285 larval = crypto_alloc_test_larval(alg);
289 list_add(&alg->cra_list, &crypto_alg_list);
292 list_add(&larval->alg.cra_list, &crypto_alg_list);
294 alg->cra_flags |= CRYPTO_ALG_TESTED;
296 crypto_stats_init(alg);
302 larval = ERR_PTR(ret);
306 void crypto_alg_tested(const char *name, int err)
308 struct crypto_larval *test;
309 struct crypto_alg *alg;
310 struct crypto_alg *q;
314 down_write(&crypto_alg_sem);
315 list_for_each_entry(q, &crypto_alg_list, cra_list) {
316 if (crypto_is_moribund(q) || !crypto_is_larval(q))
319 test = (struct crypto_larval *)q;
321 if (!strcmp(q->cra_driver_name, name))
325 pr_err("alg: Unexpected test result for %s: %d\n", name, err);
329 q->cra_flags |= CRYPTO_ALG_DEAD;
332 if (list_empty(&alg->cra_list))
335 if (err == -ECANCELED)
336 alg->cra_flags |= CRYPTO_ALG_FIPS_INTERNAL;
340 alg->cra_flags &= ~CRYPTO_ALG_FIPS_INTERNAL;
342 alg->cra_flags |= CRYPTO_ALG_TESTED;
344 /* Only satisfy larval waiters if we are the best. */
346 list_for_each_entry(q, &crypto_alg_list, cra_list) {
347 if (crypto_is_moribund(q) || !crypto_is_larval(q))
350 if (strcmp(alg->cra_name, q->cra_name))
353 if (q->cra_priority > alg->cra_priority) {
359 list_for_each_entry(q, &crypto_alg_list, cra_list) {
363 if (crypto_is_moribund(q))
366 if (crypto_is_larval(q)) {
367 struct crypto_larval *larval = (void *)q;
370 * Check to see if either our generic name or
371 * specific name can satisfy the name requested
372 * by the larval entry q.
374 if (strcmp(alg->cra_name, q->cra_name) &&
375 strcmp(alg->cra_driver_name, q->cra_name))
380 if ((q->cra_flags ^ alg->cra_flags) & larval->mask)
383 if (best && crypto_mod_get(alg))
386 larval->adult = ERR_PTR(-EAGAIN);
391 if (strcmp(alg->cra_name, q->cra_name))
394 if (strcmp(alg->cra_driver_name, q->cra_driver_name) &&
395 q->cra_priority > alg->cra_priority)
398 crypto_remove_spawns(q, &list, alg);
402 complete_all(&test->completion);
405 up_write(&crypto_alg_sem);
407 crypto_remove_final(&list);
409 EXPORT_SYMBOL_GPL(crypto_alg_tested);
411 void crypto_remove_final(struct list_head *list)
413 struct crypto_alg *alg;
414 struct crypto_alg *n;
416 list_for_each_entry_safe(alg, n, list, cra_list) {
417 list_del_init(&alg->cra_list);
421 EXPORT_SYMBOL_GPL(crypto_remove_final);
423 int crypto_register_alg(struct crypto_alg *alg)
425 struct crypto_larval *larval;
429 alg->cra_flags &= ~CRYPTO_ALG_DEAD;
430 err = crypto_check_alg(alg);
434 down_write(&crypto_alg_sem);
435 larval = __crypto_register_alg(alg);
436 test_started = static_key_enabled(&crypto_boot_test_finished);
437 if (!IS_ERR_OR_NULL(larval))
438 larval->test_started = test_started;
439 up_write(&crypto_alg_sem);
441 if (IS_ERR_OR_NULL(larval))
442 return PTR_ERR(larval);
445 crypto_wait_for_test(larval);
448 EXPORT_SYMBOL_GPL(crypto_register_alg);
450 static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list)
452 if (unlikely(list_empty(&alg->cra_list)))
455 alg->cra_flags |= CRYPTO_ALG_DEAD;
457 list_del_init(&alg->cra_list);
458 crypto_remove_spawns(alg, list, NULL);
463 void crypto_unregister_alg(struct crypto_alg *alg)
468 down_write(&crypto_alg_sem);
469 ret = crypto_remove_alg(alg, &list);
470 up_write(&crypto_alg_sem);
472 if (WARN(ret, "Algorithm %s is not registered", alg->cra_driver_name))
475 if (WARN_ON(refcount_read(&alg->cra_refcnt) != 1))
478 if (alg->cra_destroy)
479 alg->cra_destroy(alg);
481 crypto_remove_final(&list);
483 EXPORT_SYMBOL_GPL(crypto_unregister_alg);
485 int crypto_register_algs(struct crypto_alg *algs, int count)
489 for (i = 0; i < count; i++) {
490 ret = crypto_register_alg(&algs[i]);
498 for (--i; i >= 0; --i)
499 crypto_unregister_alg(&algs[i]);
503 EXPORT_SYMBOL_GPL(crypto_register_algs);
505 void crypto_unregister_algs(struct crypto_alg *algs, int count)
509 for (i = 0; i < count; i++)
510 crypto_unregister_alg(&algs[i]);
512 EXPORT_SYMBOL_GPL(crypto_unregister_algs);
514 int crypto_register_template(struct crypto_template *tmpl)
516 struct crypto_template *q;
519 down_write(&crypto_alg_sem);
521 crypto_check_module_sig(tmpl->module);
523 list_for_each_entry(q, &crypto_template_list, list) {
528 list_add(&tmpl->list, &crypto_template_list);
531 up_write(&crypto_alg_sem);
534 EXPORT_SYMBOL_GPL(crypto_register_template);
536 int crypto_register_templates(struct crypto_template *tmpls, int count)
540 for (i = 0; i < count; i++) {
541 err = crypto_register_template(&tmpls[i]);
548 for (--i; i >= 0; --i)
549 crypto_unregister_template(&tmpls[i]);
552 EXPORT_SYMBOL_GPL(crypto_register_templates);
554 void crypto_unregister_template(struct crypto_template *tmpl)
556 struct crypto_instance *inst;
557 struct hlist_node *n;
558 struct hlist_head *list;
561 down_write(&crypto_alg_sem);
563 BUG_ON(list_empty(&tmpl->list));
564 list_del_init(&tmpl->list);
566 list = &tmpl->instances;
567 hlist_for_each_entry(inst, list, list) {
568 int err = crypto_remove_alg(&inst->alg, &users);
573 up_write(&crypto_alg_sem);
575 hlist_for_each_entry_safe(inst, n, list, list) {
576 BUG_ON(refcount_read(&inst->alg.cra_refcnt) != 1);
577 crypto_free_instance(inst);
579 crypto_remove_final(&users);
581 EXPORT_SYMBOL_GPL(crypto_unregister_template);
583 void crypto_unregister_templates(struct crypto_template *tmpls, int count)
587 for (i = count - 1; i >= 0; --i)
588 crypto_unregister_template(&tmpls[i]);
590 EXPORT_SYMBOL_GPL(crypto_unregister_templates);
592 static struct crypto_template *__crypto_lookup_template(const char *name)
594 struct crypto_template *q, *tmpl = NULL;
596 down_read(&crypto_alg_sem);
597 list_for_each_entry(q, &crypto_template_list, list) {
598 if (strcmp(q->name, name))
600 if (unlikely(!crypto_tmpl_get(q)))
606 up_read(&crypto_alg_sem);
611 struct crypto_template *crypto_lookup_template(const char *name)
613 return try_then_request_module(__crypto_lookup_template(name),
616 EXPORT_SYMBOL_GPL(crypto_lookup_template);
618 int crypto_register_instance(struct crypto_template *tmpl,
619 struct crypto_instance *inst)
621 struct crypto_larval *larval;
622 struct crypto_spawn *spawn;
623 u32 fips_internal = 0;
626 err = crypto_check_alg(&inst->alg);
630 inst->alg.cra_module = tmpl->module;
631 inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE;
633 down_write(&crypto_alg_sem);
635 larval = ERR_PTR(-EAGAIN);
636 for (spawn = inst->spawns; spawn;) {
637 struct crypto_spawn *next;
644 spawn->registered = true;
646 fips_internal |= spawn->alg->cra_flags;
648 crypto_mod_put(spawn->alg);
653 inst->alg.cra_flags |= (fips_internal & CRYPTO_ALG_FIPS_INTERNAL);
655 larval = __crypto_register_alg(&inst->alg);
659 larval->test_started = true;
661 hlist_add_head(&inst->list, &tmpl->instances);
665 up_write(&crypto_alg_sem);
667 err = PTR_ERR(larval);
668 if (IS_ERR_OR_NULL(larval))
671 crypto_wait_for_test(larval);
677 EXPORT_SYMBOL_GPL(crypto_register_instance);
679 void crypto_unregister_instance(struct crypto_instance *inst)
683 down_write(&crypto_alg_sem);
685 crypto_remove_spawns(&inst->alg, &list, NULL);
686 crypto_remove_instance(inst, &list);
688 up_write(&crypto_alg_sem);
690 crypto_remove_final(&list);
692 EXPORT_SYMBOL_GPL(crypto_unregister_instance);
694 int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst,
695 const char *name, u32 type, u32 mask)
697 struct crypto_alg *alg;
700 if (WARN_ON_ONCE(inst == NULL))
703 /* Allow the result of crypto_attr_alg_name() to be passed directly */
705 return PTR_ERR(name);
707 alg = crypto_find_alg(name, spawn->frontend,
708 type | CRYPTO_ALG_FIPS_INTERNAL, mask);
712 down_write(&crypto_alg_sem);
713 if (!crypto_is_moribund(alg)) {
714 list_add(&spawn->list, &alg->cra_users);
717 spawn->next = inst->spawns;
718 inst->spawns = spawn;
719 inst->alg.cra_flags |=
720 (alg->cra_flags & CRYPTO_ALG_INHERITED_FLAGS);
723 up_write(&crypto_alg_sem);
728 EXPORT_SYMBOL_GPL(crypto_grab_spawn);
730 void crypto_drop_spawn(struct crypto_spawn *spawn)
732 if (!spawn->alg) /* not yet initialized? */
735 down_write(&crypto_alg_sem);
737 list_del(&spawn->list);
738 up_write(&crypto_alg_sem);
740 if (!spawn->registered)
741 crypto_mod_put(spawn->alg);
743 EXPORT_SYMBOL_GPL(crypto_drop_spawn);
745 static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
747 struct crypto_alg *alg = ERR_PTR(-EAGAIN);
748 struct crypto_alg *target;
751 down_read(&crypto_alg_sem);
754 if (!crypto_mod_get(alg)) {
755 target = crypto_alg_get(alg);
757 alg = ERR_PTR(-EAGAIN);
760 up_read(&crypto_alg_sem);
763 crypto_shoot_alg(target);
764 crypto_alg_put(target);
770 struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
773 struct crypto_alg *alg;
774 struct crypto_tfm *tfm;
776 alg = crypto_spawn_alg(spawn);
778 return ERR_CAST(alg);
780 tfm = ERR_PTR(-EINVAL);
781 if (unlikely((alg->cra_flags ^ type) & mask))
784 tfm = __crypto_alloc_tfm(alg, type, mask);
794 EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
796 void *crypto_spawn_tfm2(struct crypto_spawn *spawn)
798 struct crypto_alg *alg;
799 struct crypto_tfm *tfm;
801 alg = crypto_spawn_alg(spawn);
803 return ERR_CAST(alg);
805 tfm = crypto_create_tfm(alg, spawn->frontend);
815 EXPORT_SYMBOL_GPL(crypto_spawn_tfm2);
817 int crypto_register_notifier(struct notifier_block *nb)
819 return blocking_notifier_chain_register(&crypto_chain, nb);
821 EXPORT_SYMBOL_GPL(crypto_register_notifier);
823 int crypto_unregister_notifier(struct notifier_block *nb)
825 return blocking_notifier_chain_unregister(&crypto_chain, nb);
827 EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
829 struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb)
831 struct rtattr *rta = tb[0];
832 struct crypto_attr_type *algt;
835 return ERR_PTR(-ENOENT);
836 if (RTA_PAYLOAD(rta) < sizeof(*algt))
837 return ERR_PTR(-EINVAL);
838 if (rta->rta_type != CRYPTOA_TYPE)
839 return ERR_PTR(-EINVAL);
841 algt = RTA_DATA(rta);
845 EXPORT_SYMBOL_GPL(crypto_get_attr_type);
848 * crypto_check_attr_type() - check algorithm type and compute inherited mask
849 * @tb: the template parameters
850 * @type: the algorithm type the template would be instantiated as
851 * @mask_ret: (output) the mask that should be passed to crypto_grab_*()
852 * to restrict the flags of any inner algorithms
854 * Validate that the algorithm type the user requested is compatible with the
855 * one the template would actually be instantiated as. E.g., if the user is
856 * doing crypto_alloc_shash("cbc(aes)", ...), this would return an error because
857 * the "cbc" template creates an "skcipher" algorithm, not an "shash" algorithm.
859 * Also compute the mask to use to restrict the flags of any inner algorithms.
861 * Return: 0 on success; -errno on failure
863 int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret)
865 struct crypto_attr_type *algt;
867 algt = crypto_get_attr_type(tb);
869 return PTR_ERR(algt);
871 if ((algt->type ^ type) & algt->mask)
874 *mask_ret = crypto_algt_inherited_mask(algt);
877 EXPORT_SYMBOL_GPL(crypto_check_attr_type);
879 const char *crypto_attr_alg_name(struct rtattr *rta)
881 struct crypto_attr_alg *alga;
884 return ERR_PTR(-ENOENT);
885 if (RTA_PAYLOAD(rta) < sizeof(*alga))
886 return ERR_PTR(-EINVAL);
887 if (rta->rta_type != CRYPTOA_ALG)
888 return ERR_PTR(-EINVAL);
890 alga = RTA_DATA(rta);
891 alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
895 EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
897 int crypto_inst_setname(struct crypto_instance *inst, const char *name,
898 struct crypto_alg *alg)
900 if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name,
901 alg->cra_name) >= CRYPTO_MAX_ALG_NAME)
902 return -ENAMETOOLONG;
904 if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
905 name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
906 return -ENAMETOOLONG;
910 EXPORT_SYMBOL_GPL(crypto_inst_setname);
912 void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)
914 INIT_LIST_HEAD(&queue->list);
915 queue->backlog = &queue->list;
917 queue->max_qlen = max_qlen;
919 EXPORT_SYMBOL_GPL(crypto_init_queue);
921 int crypto_enqueue_request(struct crypto_queue *queue,
922 struct crypto_async_request *request)
924 int err = -EINPROGRESS;
926 if (unlikely(queue->qlen >= queue->max_qlen)) {
927 if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
932 if (queue->backlog == &queue->list)
933 queue->backlog = &request->list;
937 list_add_tail(&request->list, &queue->list);
942 EXPORT_SYMBOL_GPL(crypto_enqueue_request);
944 void crypto_enqueue_request_head(struct crypto_queue *queue,
945 struct crypto_async_request *request)
947 if (unlikely(queue->qlen >= queue->max_qlen))
948 queue->backlog = queue->backlog->prev;
951 list_add(&request->list, &queue->list);
953 EXPORT_SYMBOL_GPL(crypto_enqueue_request_head);
955 struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
957 struct list_head *request;
959 if (unlikely(!queue->qlen))
964 if (queue->backlog != &queue->list)
965 queue->backlog = queue->backlog->next;
967 request = queue->list.next;
970 return list_entry(request, struct crypto_async_request, list);
972 EXPORT_SYMBOL_GPL(crypto_dequeue_request);
974 static inline void crypto_inc_byte(u8 *a, unsigned int size)
979 for (; size; size--) {
987 void crypto_inc(u8 *a, unsigned int size)
989 __be32 *b = (__be32 *)(a + size);
992 if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) ||
993 IS_ALIGNED((unsigned long)b, __alignof__(*b)))
994 for (; size >= 4; size -= 4) {
995 c = be32_to_cpu(*--b) + 1;
1001 crypto_inc_byte(a, size);
1003 EXPORT_SYMBOL_GPL(crypto_inc);
1005 unsigned int crypto_alg_extsize(struct crypto_alg *alg)
1007 return alg->cra_ctxsize +
1008 (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1));
1010 EXPORT_SYMBOL_GPL(crypto_alg_extsize);
1012 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
1016 struct crypto_alg *alg = crypto_find_alg(name, frontend, type, mask);
1019 crypto_mod_put(alg);
1025 EXPORT_SYMBOL_GPL(crypto_type_has_alg);
1027 #ifdef CONFIG_CRYPTO_STATS
1028 void crypto_stats_init(struct crypto_alg *alg)
1030 memset(&alg->stats, 0, sizeof(alg->stats));
1032 EXPORT_SYMBOL_GPL(crypto_stats_init);
1034 void crypto_stats_get(struct crypto_alg *alg)
1036 crypto_alg_get(alg);
1038 EXPORT_SYMBOL_GPL(crypto_stats_get);
1040 void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg,
1043 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1044 atomic64_inc(&alg->stats.aead.err_cnt);
1046 atomic64_inc(&alg->stats.aead.encrypt_cnt);
1047 atomic64_add(cryptlen, &alg->stats.aead.encrypt_tlen);
1049 crypto_alg_put(alg);
1051 EXPORT_SYMBOL_GPL(crypto_stats_aead_encrypt);
1053 void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg,
1056 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1057 atomic64_inc(&alg->stats.aead.err_cnt);
1059 atomic64_inc(&alg->stats.aead.decrypt_cnt);
1060 atomic64_add(cryptlen, &alg->stats.aead.decrypt_tlen);
1062 crypto_alg_put(alg);
1064 EXPORT_SYMBOL_GPL(crypto_stats_aead_decrypt);
1066 void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret,
1067 struct crypto_alg *alg)
1069 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1070 atomic64_inc(&alg->stats.akcipher.err_cnt);
1072 atomic64_inc(&alg->stats.akcipher.encrypt_cnt);
1073 atomic64_add(src_len, &alg->stats.akcipher.encrypt_tlen);
1075 crypto_alg_put(alg);
1077 EXPORT_SYMBOL_GPL(crypto_stats_akcipher_encrypt);
1079 void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret,
1080 struct crypto_alg *alg)
1082 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1083 atomic64_inc(&alg->stats.akcipher.err_cnt);
1085 atomic64_inc(&alg->stats.akcipher.decrypt_cnt);
1086 atomic64_add(src_len, &alg->stats.akcipher.decrypt_tlen);
1088 crypto_alg_put(alg);
1090 EXPORT_SYMBOL_GPL(crypto_stats_akcipher_decrypt);
1092 void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg)
1094 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
1095 atomic64_inc(&alg->stats.akcipher.err_cnt);
1097 atomic64_inc(&alg->stats.akcipher.sign_cnt);
1098 crypto_alg_put(alg);
1100 EXPORT_SYMBOL_GPL(crypto_stats_akcipher_sign);
1102 void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg)
1104 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
1105 atomic64_inc(&alg->stats.akcipher.err_cnt);
1107 atomic64_inc(&alg->stats.akcipher.verify_cnt);
1108 crypto_alg_put(alg);
1110 EXPORT_SYMBOL_GPL(crypto_stats_akcipher_verify);
1112 void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg)
1114 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1115 atomic64_inc(&alg->stats.compress.err_cnt);
1117 atomic64_inc(&alg->stats.compress.compress_cnt);
1118 atomic64_add(slen, &alg->stats.compress.compress_tlen);
1120 crypto_alg_put(alg);
1122 EXPORT_SYMBOL_GPL(crypto_stats_compress);
1124 void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg)
1126 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1127 atomic64_inc(&alg->stats.compress.err_cnt);
1129 atomic64_inc(&alg->stats.compress.decompress_cnt);
1130 atomic64_add(slen, &alg->stats.compress.decompress_tlen);
1132 crypto_alg_put(alg);
1134 EXPORT_SYMBOL_GPL(crypto_stats_decompress);
1136 void crypto_stats_ahash_update(unsigned int nbytes, int ret,
1137 struct crypto_alg *alg)
1139 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
1140 atomic64_inc(&alg->stats.hash.err_cnt);
1142 atomic64_add(nbytes, &alg->stats.hash.hash_tlen);
1143 crypto_alg_put(alg);
1145 EXPORT_SYMBOL_GPL(crypto_stats_ahash_update);
1147 void crypto_stats_ahash_final(unsigned int nbytes, int ret,
1148 struct crypto_alg *alg)
1150 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1151 atomic64_inc(&alg->stats.hash.err_cnt);
1153 atomic64_inc(&alg->stats.hash.hash_cnt);
1154 atomic64_add(nbytes, &alg->stats.hash.hash_tlen);
1156 crypto_alg_put(alg);
1158 EXPORT_SYMBOL_GPL(crypto_stats_ahash_final);
1160 void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret)
1163 atomic64_inc(&alg->stats.kpp.err_cnt);
1165 atomic64_inc(&alg->stats.kpp.setsecret_cnt);
1166 crypto_alg_put(alg);
1168 EXPORT_SYMBOL_GPL(crypto_stats_kpp_set_secret);
1170 void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret)
1173 atomic64_inc(&alg->stats.kpp.err_cnt);
1175 atomic64_inc(&alg->stats.kpp.generate_public_key_cnt);
1176 crypto_alg_put(alg);
1178 EXPORT_SYMBOL_GPL(crypto_stats_kpp_generate_public_key);
1180 void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret)
1183 atomic64_inc(&alg->stats.kpp.err_cnt);
1185 atomic64_inc(&alg->stats.kpp.compute_shared_secret_cnt);
1186 crypto_alg_put(alg);
1188 EXPORT_SYMBOL_GPL(crypto_stats_kpp_compute_shared_secret);
1190 void crypto_stats_rng_seed(struct crypto_alg *alg, int ret)
1192 if (ret && ret != -EINPROGRESS && ret != -EBUSY)
1193 atomic64_inc(&alg->stats.rng.err_cnt);
1195 atomic64_inc(&alg->stats.rng.seed_cnt);
1196 crypto_alg_put(alg);
1198 EXPORT_SYMBOL_GPL(crypto_stats_rng_seed);
1200 void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen,
1203 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1204 atomic64_inc(&alg->stats.rng.err_cnt);
1206 atomic64_inc(&alg->stats.rng.generate_cnt);
1207 atomic64_add(dlen, &alg->stats.rng.generate_tlen);
1209 crypto_alg_put(alg);
1211 EXPORT_SYMBOL_GPL(crypto_stats_rng_generate);
1213 void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret,
1214 struct crypto_alg *alg)
1216 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1217 atomic64_inc(&alg->stats.cipher.err_cnt);
1219 atomic64_inc(&alg->stats.cipher.encrypt_cnt);
1220 atomic64_add(cryptlen, &alg->stats.cipher.encrypt_tlen);
1222 crypto_alg_put(alg);
1224 EXPORT_SYMBOL_GPL(crypto_stats_skcipher_encrypt);
1226 void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret,
1227 struct crypto_alg *alg)
1229 if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
1230 atomic64_inc(&alg->stats.cipher.err_cnt);
1232 atomic64_inc(&alg->stats.cipher.decrypt_cnt);
1233 atomic64_add(cryptlen, &alg->stats.cipher.decrypt_tlen);
1235 crypto_alg_put(alg);
1237 EXPORT_SYMBOL_GPL(crypto_stats_skcipher_decrypt);
1240 static void __init crypto_start_tests(void)
1243 struct crypto_larval *larval = NULL;
1244 struct crypto_alg *q;
1246 down_write(&crypto_alg_sem);
1248 list_for_each_entry(q, &crypto_alg_list, cra_list) {
1249 struct crypto_larval *l;
1251 if (!crypto_is_larval(q))
1256 if (!crypto_is_test_larval(l))
1259 if (l->test_started)
1262 l->test_started = true;
1267 up_write(&crypto_alg_sem);
1272 crypto_wait_for_test(larval);
1275 static_branch_enable(&crypto_boot_test_finished);
1278 static int __init crypto_algapi_init(void)
1281 crypto_start_tests();
1285 static void __exit crypto_algapi_exit(void)
1291 * We run this at late_initcall so that all the built-in algorithms
1292 * have had a chance to register themselves first.
1294 late_initcall(crypto_algapi_init);
1295 module_exit(crypto_algapi_exit);
1297 MODULE_LICENSE("GPL");
1298 MODULE_DESCRIPTION("Cryptographic algorithms API");
1299 MODULE_SOFTDEP("pre: cryptomgr");