| /* |
| * Cryptographic API for algorithms (i.e., low-level API). |
| * |
| * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation; either version 2 of the License, or (at your option) |
| * any later version. |
| * |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/errno.h> |
| #include <linux/fips.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| |
| #include "internal.h" |
| |
| static LIST_HEAD(crypto_template_list); |
| |
| static inline int crypto_set_driver_name(struct crypto_alg *alg) |
| { |
| static const char suffix[] = "-generic"; |
| char *driver_name = alg->cra_driver_name; |
| int len; |
| |
| if (*driver_name) |
| return 0; |
| |
| len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); |
| if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME) |
| return -ENAMETOOLONG; |
| |
| memcpy(driver_name + len, suffix, sizeof(suffix)); |
| return 0; |
| } |
| |
| static inline void crypto_check_module_sig(struct module *mod) |
| { |
| if (fips_enabled && mod && !module_sig_ok(mod)) |
| panic("Module %s signature verification failed in FIPS mode\n", |
| module_name(mod)); |
| } |
| |
| static int crypto_check_alg(struct crypto_alg *alg) |
| { |
| crypto_check_module_sig(alg->cra_module); |
| |
| if (alg->cra_alignmask & (alg->cra_alignmask + 1)) |
| return -EINVAL; |
| |
| if (alg->cra_blocksize > PAGE_SIZE / 8) |
| return -EINVAL; |
| |
| if (alg->cra_priority < 0) |
| return -EINVAL; |
| |
| atomic_set(&alg->cra_refcnt, 1); |
| |
| return crypto_set_driver_name(alg); |
| } |
| |
| static void crypto_destroy_instance(struct crypto_alg *alg) |
| { |
| struct crypto_instance *inst = (void *)alg; |
| struct crypto_template *tmpl = inst->tmpl; |
| |
| tmpl->free(inst); |
| crypto_tmpl_put(tmpl); |
| } |
| |
| static struct list_head *crypto_more_spawns(struct crypto_alg *alg, |
| struct list_head *stack, |
| struct list_head *top, |
| struct list_head *secondary_spawns) |
| { |
| struct crypto_spawn *spawn, *n; |
| |
| if (list_empty(stack)) |
| return NULL; |
| |
| spawn = list_first_entry(stack, struct crypto_spawn, list); |
| n = list_entry(spawn->list.next, struct crypto_spawn, list); |
| |
| if (spawn->alg && &n->list != stack && !n->alg) |
| n->alg = (n->list.next == stack) ? alg : |
| &list_entry(n->list.next, struct crypto_spawn, |
| list)->inst->alg; |
| |
| list_move(&spawn->list, secondary_spawns); |
| |
| return &n->list == stack ? top : &n->inst->alg.cra_users; |
| } |
| |
| static void crypto_remove_instance(struct crypto_instance *inst, |
| struct list_head *list) |
| { |
| struct crypto_template *tmpl = inst->tmpl; |
| |
| if (crypto_is_dead(&inst->alg)) |
| return; |
| |
| inst->alg.cra_flags |= CRYPTO_ALG_DEAD; |
| if (hlist_unhashed(&inst->list)) |
| return; |
| |
| if (!tmpl || !crypto_tmpl_get(tmpl)) |
| return; |
| |
| crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg); |
| list_move(&inst->alg.cra_list, list); |
| hlist_del(&inst->list); |
| inst->alg.cra_destroy = crypto_destroy_instance; |
| |
| BUG_ON(!list_empty(&inst->alg.cra_users)); |
| } |
| |
| void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, |
| struct crypto_alg *nalg) |
| { |
| u32 new_type = (nalg ?: alg)->cra_flags; |
| struct crypto_spawn *spawn, *n; |
| LIST_HEAD(secondary_spawns); |
| struct list_head *spawns; |
| LIST_HEAD(stack); |
| LIST_HEAD(top); |
| |
| spawns = &alg->cra_users; |
| list_for_each_entry_safe(spawn, n, spawns, list) { |
| if ((spawn->alg->cra_flags ^ new_type) & spawn->mask) |
| continue; |
| |
| list_move(&spawn->list, &top); |
| } |
| |
| spawns = ⊤ |
| do { |
| while (!list_empty(spawns)) { |
| struct crypto_instance *inst; |
| |
| spawn = list_first_entry(spawns, struct crypto_spawn, |
| list); |
| inst = spawn->inst; |
| |
| BUG_ON(&inst->alg == alg); |
| |
| list_move(&spawn->list, &stack); |
| |
| if (&inst->alg == nalg) |
| break; |
| |
| spawn->alg = NULL; |
| spawns = &inst->alg.cra_users; |
| } |
| } while ((spawns = crypto_more_spawns(alg, &stack, &top, |
| &secondary_spawns))); |
| |
| list_for_each_entry_safe(spawn, n, &secondary_spawns, list) { |
| if (spawn->alg) |
| list_move(&spawn->list, &spawn->alg->cra_users); |
| else |
| crypto_remove_instance(spawn->inst, list); |
| } |
| } |
| EXPORT_SYMBOL_GPL(crypto_remove_spawns); |
| |
| static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg) |
| { |
| struct crypto_alg *q; |
| struct crypto_larval *larval; |
| int ret = -EAGAIN; |
| |
| if (crypto_is_dead(alg)) |
| goto err; |
| |
| INIT_LIST_HEAD(&alg->cra_users); |
| |
| /* No cheating! */ |
| alg->cra_flags &= ~CRYPTO_ALG_TESTED; |
| |
| ret = -EEXIST; |
| |
| list_for_each_entry(q, &crypto_alg_list, cra_list) { |
| if (q == alg) |
| goto err; |
| |
| if (crypto_is_moribund(q)) |
| continue; |
| |
| if (crypto_is_larval(q)) { |
| if (!strcmp(alg->cra_driver_name, q->cra_driver_name)) |
| goto err; |
| continue; |
| } |
| |
| if (!strcmp(q->cra_driver_name, alg->cra_name) || |
| !strcmp(q->cra_name, alg->cra_driver_name)) |
| goto err; |
| } |
| |
| larval = crypto_larval_alloc(alg->cra_name, |
| alg->cra_flags | CRYPTO_ALG_TESTED, 0); |
| if (IS_ERR(larval)) |
| goto out; |
| |
| ret = -ENOENT; |
| larval->adult = crypto_mod_get(alg); |
| if (!larval->adult) |
| goto free_larval; |
| |
| atomic_set(&larval->alg.cra_refcnt, 1); |
| memcpy(larval->alg.cra_driver_name, alg->cra_driver_name, |
| CRYPTO_MAX_ALG_NAME); |
| larval->alg.cra_priority = alg->cra_priority; |
| |
| list_add(&alg->cra_list, &crypto_alg_list); |
| list_add(&larval->alg.cra_list, &crypto_alg_list); |
| |
| out: |
| return larval; |
| |
| free_larval: |
| kfree(larval); |
| err: |
| larval = ERR_PTR(ret); |
| goto out; |
| } |
| |
| void crypto_alg_tested(const char *name, int err) |
| { |
| struct crypto_larval *test; |
| struct crypto_alg *alg; |
| struct crypto_alg *q; |
| LIST_HEAD(list); |
| |
| down_write(&crypto_alg_sem); |
| list_for_each_entry(q, &crypto_alg_list, cra_list) { |
| if (crypto_is_moribund(q) || !crypto_is_larval(q)) |
| continue; |
| |
| test = (struct crypto_larval *)q; |
| |
| if (!strcmp(q->cra_driver_name, name)) |
| goto found; |
| } |
| |
| printk(KERN_ERR "alg: Unexpected test result for %s: %d\n", name, err); |
| goto unlock; |
| |
| found: |
| q->cra_flags |= CRYPTO_ALG_DEAD; |
| alg = test->adult; |
| if (err || list_empty(&alg->cra_list)) |
| goto complete; |
| |
| alg->cra_flags |= CRYPTO_ALG_TESTED; |
| |
| list_for_each_entry(q, &crypto_alg_list, cra_list) { |
| if (q == alg) |
| continue; |
| |
| if (crypto_is_moribund(q)) |
| continue; |
| |
| if (crypto_is_larval(q)) { |
| struct crypto_larval *larval = (void *)q; |
| |
| /* |
| * Check to see if either our generic name or |
| * specific name can satisfy the name requested |
| * by the larval entry q. |
| */ |
| if (strcmp(alg->cra_name, q->cra_name) && |
| strcmp(alg->cra_driver_name, q->cra_name)) |
| continue; |
| |
| if (larval->adult) |
| continue; |
| if ((q->cra_flags ^ alg->cra_flags) & larval->mask) |
| continue; |
| if (!crypto_mod_get(alg)) |
| continue; |
| |
| larval->adult = alg; |
| continue; |
| } |
| |
| if (strcmp(alg->cra_name, q->cra_name)) |
| continue; |
| |
| if (strcmp(alg->cra_driver_name, q->cra_driver_name) && |
| q->cra_priority > alg->cra_priority) |
| continue; |
| |
| crypto_remove_spawns(q, &list, alg); |
| } |
| |
| complete: |
| complete_all(&test->completion); |
| |
| unlock: |
| up_write(&crypto_alg_sem); |
| |
| crypto_remove_final(&list); |
| } |
| EXPORT_SYMBOL_GPL(crypto_alg_tested); |
| |
| void crypto_remove_final(struct list_head *list) |
| { |
| struct crypto_alg *alg; |
| struct crypto_alg *n; |
| |
| list_for_each_entry_safe(alg, n, list, cra_list) { |
| list_del_init(&alg->cra_list); |
| crypto_alg_put(alg); |
| } |
| } |
| EXPORT_SYMBOL_GPL(crypto_remove_final); |
| |
| static void crypto_wait_for_test(struct crypto_larval *larval) |
| { |
| int err; |
| |
| err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult); |
| if (err != NOTIFY_STOP) { |
| if (WARN_ON(err != NOTIFY_DONE)) |
| goto out; |
| crypto_alg_tested(larval->alg.cra_driver_name, 0); |
| } |
| |
| err = wait_for_completion_interruptible(&larval->completion); |
| WARN_ON(err); |
| |
| out: |
| crypto_larval_kill(&larval->alg); |
| } |
| |
| int crypto_register_alg(struct crypto_alg *alg) |
| { |
| struct crypto_larval *larval; |
| int err; |
| |
| err = crypto_check_alg(alg); |
| if (err) |
| return err; |
| |
| down_write(&crypto_alg_sem); |
| larval = __crypto_register_alg(alg); |
| up_write(&crypto_alg_sem); |
| |
| if (IS_ERR(larval)) |
| return PTR_ERR(larval); |
| |
| crypto_wait_for_test(larval); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_register_alg); |
| |
| static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list) |
| { |
| if (unlikely(list_empty(&alg->cra_list))) |
| return -ENOENT; |
| |
| alg->cra_flags |= CRYPTO_ALG_DEAD; |
| |
| crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg); |
| list_del_init(&alg->cra_list); |
| crypto_remove_spawns(alg, list, NULL); |
| |
| return 0; |
| } |
| |
| int crypto_unregister_alg(struct crypto_alg *alg) |
| { |
| int ret; |
| LIST_HEAD(list); |
| |
| down_write(&crypto_alg_sem); |
| ret = crypto_remove_alg(alg, &list); |
| up_write(&crypto_alg_sem); |
| |
| if (ret) |
| return ret; |
| |
| BUG_ON(atomic_read(&alg->cra_refcnt) != 1); |
| if (alg->cra_destroy) |
| alg->cra_destroy(alg); |
| |
| crypto_remove_final(&list); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_unregister_alg); |
| |
| int crypto_register_algs(struct crypto_alg *algs, int count) |
| { |
| int i, ret; |
| |
| for (i = 0; i < count; i++) { |
| ret = crypto_register_alg(&algs[i]); |
| if (ret) |
| goto err; |
| } |
| |
| return 0; |
| |
| err: |
| for (--i; i >= 0; --i) |
| crypto_unregister_alg(&algs[i]); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(crypto_register_algs); |
| |
| int crypto_unregister_algs(struct crypto_alg *algs, int count) |
| { |
| int i, ret; |
| |
| for (i = 0; i < count; i++) { |
| ret = crypto_unregister_alg(&algs[i]); |
| if (ret) |
| pr_err("Failed to unregister %s %s: %d\n", |
| algs[i].cra_driver_name, algs[i].cra_name, ret); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_unregister_algs); |
| |
| int crypto_register_template(struct crypto_template *tmpl) |
| { |
| struct crypto_template *q; |
| int err = -EEXIST; |
| |
| down_write(&crypto_alg_sem); |
| |
| crypto_check_module_sig(tmpl->module); |
| |
| list_for_each_entry(q, &crypto_template_list, list) { |
| if (q == tmpl) |
| goto out; |
| } |
| |
| list_add(&tmpl->list, &crypto_template_list); |
| crypto_notify(CRYPTO_MSG_TMPL_REGISTER, tmpl); |
| err = 0; |
| out: |
| up_write(&crypto_alg_sem); |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(crypto_register_template); |
| |
| void crypto_unregister_template(struct crypto_template *tmpl) |
| { |
| struct crypto_instance *inst; |
| struct hlist_node *n; |
| struct hlist_head *list; |
| LIST_HEAD(users); |
| |
| down_write(&crypto_alg_sem); |
| |
| BUG_ON(list_empty(&tmpl->list)); |
| list_del_init(&tmpl->list); |
| |
| list = &tmpl->instances; |
| hlist_for_each_entry(inst, list, list) { |
| int err = crypto_remove_alg(&inst->alg, &users); |
| |
| BUG_ON(err); |
| } |
| |
| crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER, tmpl); |
| |
| up_write(&crypto_alg_sem); |
| |
| hlist_for_each_entry_safe(inst, n, list, list) { |
| BUG_ON(atomic_read(&inst->alg.cra_refcnt) != 1); |
| tmpl->free(inst); |
| } |
| crypto_remove_final(&users); |
| } |
| EXPORT_SYMBOL_GPL(crypto_unregister_template); |
| |
| static struct crypto_template *__crypto_lookup_template(const char *name) |
| { |
| struct crypto_template *q, *tmpl = NULL; |
| |
| down_read(&crypto_alg_sem); |
| list_for_each_entry(q, &crypto_template_list, list) { |
| if (strcmp(q->name, name)) |
| continue; |
| if (unlikely(!crypto_tmpl_get(q))) |
| continue; |
| |
| tmpl = q; |
| break; |
| } |
| up_read(&crypto_alg_sem); |
| |
| return tmpl; |
| } |
| |
| struct crypto_template *crypto_lookup_template(const char *name) |
| { |
| return try_then_request_module(__crypto_lookup_template(name), |
| "crypto-%s", name); |
| } |
| EXPORT_SYMBOL_GPL(crypto_lookup_template); |
| |
| int crypto_register_instance(struct crypto_template *tmpl, |
| struct crypto_instance *inst) |
| { |
| struct crypto_larval *larval; |
| int err; |
| |
| err = crypto_check_alg(&inst->alg); |
| if (err) |
| return err; |
| |
| inst->alg.cra_module = tmpl->module; |
| inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE; |
| |
| if (unlikely(!crypto_mod_get(&inst->alg))) |
| return -EAGAIN; |
| |
| down_write(&crypto_alg_sem); |
| |
| larval = __crypto_register_alg(&inst->alg); |
| if (IS_ERR(larval)) |
| goto unlock; |
| |
| hlist_add_head(&inst->list, &tmpl->instances); |
| inst->tmpl = tmpl; |
| |
| unlock: |
| up_write(&crypto_alg_sem); |
| |
| err = PTR_ERR(larval); |
| if (IS_ERR(larval)) |
| goto err; |
| |
| crypto_wait_for_test(larval); |
| |
| /* Remove instance if test failed */ |
| if (!(inst->alg.cra_flags & CRYPTO_ALG_TESTED)) |
| crypto_unregister_instance(inst); |
| err = 0; |
| |
| err: |
| crypto_mod_put(&inst->alg); |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(crypto_register_instance); |
| |
| int crypto_unregister_instance(struct crypto_instance *inst) |
| { |
| LIST_HEAD(list); |
| |
| down_write(&crypto_alg_sem); |
| |
| crypto_remove_spawns(&inst->alg, &list, NULL); |
| crypto_remove_instance(inst, &list); |
| |
| up_write(&crypto_alg_sem); |
| |
| crypto_remove_final(&list); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_unregister_instance); |
| |
| int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
| struct crypto_instance *inst, u32 mask) |
| { |
| int err = -EAGAIN; |
| |
| spawn->inst = inst; |
| spawn->mask = mask; |
| |
| down_write(&crypto_alg_sem); |
| if (!crypto_is_moribund(alg)) { |
| list_add(&spawn->list, &alg->cra_users); |
| spawn->alg = alg; |
| err = 0; |
| } |
| up_write(&crypto_alg_sem); |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(crypto_init_spawn); |
| |
| int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, |
| struct crypto_instance *inst, |
| const struct crypto_type *frontend) |
| { |
| int err = -EINVAL; |
| |
| if ((alg->cra_flags ^ frontend->type) & frontend->maskset) |
| goto out; |
| |
| spawn->frontend = frontend; |
| err = crypto_init_spawn(spawn, alg, inst, frontend->maskset); |
| |
| out: |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(crypto_init_spawn2); |
| |
| int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, |
| u32 type, u32 mask) |
| { |
| struct crypto_alg *alg; |
| int err; |
| |
| alg = crypto_find_alg(name, spawn->frontend, type, mask); |
| if (IS_ERR(alg)) |
| return PTR_ERR(alg); |
| |
| err = crypto_init_spawn(spawn, alg, spawn->inst, mask); |
| crypto_mod_put(alg); |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(crypto_grab_spawn); |
| |
| void crypto_drop_spawn(struct crypto_spawn *spawn) |
| { |
| if (!spawn->alg) |
| return; |
| |
| down_write(&crypto_alg_sem); |
| list_del(&spawn->list); |
| up_write(&crypto_alg_sem); |
| } |
| EXPORT_SYMBOL_GPL(crypto_drop_spawn); |
| |
| static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn) |
| { |
| struct crypto_alg *alg; |
| struct crypto_alg *alg2; |
| |
| down_read(&crypto_alg_sem); |
| alg = spawn->alg; |
| alg2 = alg; |
| if (alg2) |
| alg2 = crypto_mod_get(alg2); |
| up_read(&crypto_alg_sem); |
| |
| if (!alg2) { |
| if (alg) |
| crypto_shoot_alg(alg); |
| return ERR_PTR(-EAGAIN); |
| } |
| |
| return alg; |
| } |
| |
| struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
| u32 mask) |
| { |
| struct crypto_alg *alg; |
| struct crypto_tfm *tfm; |
| |
| alg = crypto_spawn_alg(spawn); |
| if (IS_ERR(alg)) |
| return ERR_CAST(alg); |
| |
| tfm = ERR_PTR(-EINVAL); |
| if (unlikely((alg->cra_flags ^ type) & mask)) |
| goto out_put_alg; |
| |
| tfm = __crypto_alloc_tfm(alg, type, mask); |
| if (IS_ERR(tfm)) |
| goto out_put_alg; |
| |
| return tfm; |
| |
| out_put_alg: |
| crypto_mod_put(alg); |
| return tfm; |
| } |
| EXPORT_SYMBOL_GPL(crypto_spawn_tfm); |
| |
| void *crypto_spawn_tfm2(struct crypto_spawn *spawn) |
| { |
| struct crypto_alg *alg; |
| struct crypto_tfm *tfm; |
| |
| alg = crypto_spawn_alg(spawn); |
| if (IS_ERR(alg)) |
| return ERR_CAST(alg); |
| |
| tfm = crypto_create_tfm(alg, spawn->frontend); |
| if (IS_ERR(tfm)) |
| goto out_put_alg; |
| |
| return tfm; |
| |
| out_put_alg: |
| crypto_mod_put(alg); |
| return tfm; |
| } |
| EXPORT_SYMBOL_GPL(crypto_spawn_tfm2); |
| |
| int crypto_register_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_register(&crypto_chain, nb); |
| } |
| EXPORT_SYMBOL_GPL(crypto_register_notifier); |
| |
| int crypto_unregister_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_unregister(&crypto_chain, nb); |
| } |
| EXPORT_SYMBOL_GPL(crypto_unregister_notifier); |
| |
| struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) |
| { |
| struct rtattr *rta = tb[0]; |
| struct crypto_attr_type *algt; |
| |
| if (!rta) |
| return ERR_PTR(-ENOENT); |
| if (RTA_PAYLOAD(rta) < sizeof(*algt)) |
| return ERR_PTR(-EINVAL); |
| if (rta->rta_type != CRYPTOA_TYPE) |
| return ERR_PTR(-EINVAL); |
| |
| algt = RTA_DATA(rta); |
| |
| return algt; |
| } |
| EXPORT_SYMBOL_GPL(crypto_get_attr_type); |
| |
| int crypto_check_attr_type(struct rtattr **tb, u32 type) |
| { |
| struct crypto_attr_type *algt; |
| |
| algt = crypto_get_attr_type(tb); |
| if (IS_ERR(algt)) |
| return PTR_ERR(algt); |
| |
| if ((algt->type ^ type) & algt->mask) |
| return -EINVAL; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_check_attr_type); |
| |
| const char *crypto_attr_alg_name(struct rtattr *rta) |
| { |
| struct crypto_attr_alg *alga; |
| |
| if (!rta) |
| return ERR_PTR(-ENOENT); |
| if (RTA_PAYLOAD(rta) < sizeof(*alga)) |
| return ERR_PTR(-EINVAL); |
| if (rta->rta_type != CRYPTOA_ALG) |
| return ERR_PTR(-EINVAL); |
| |
| alga = RTA_DATA(rta); |
| alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; |
| |
| return alga->name; |
| } |
| EXPORT_SYMBOL_GPL(crypto_attr_alg_name); |
| |
| struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, |
| const struct crypto_type *frontend, |
| u32 type, u32 mask) |
| { |
| const char *name; |
| |
| name = crypto_attr_alg_name(rta); |
| if (IS_ERR(name)) |
| return ERR_CAST(name); |
| |
| return crypto_find_alg(name, frontend, type, mask); |
| } |
| EXPORT_SYMBOL_GPL(crypto_attr_alg2); |
| |
| int crypto_attr_u32(struct rtattr *rta, u32 *num) |
| { |
| struct crypto_attr_u32 *nu32; |
| |
| if (!rta) |
| return -ENOENT; |
| if (RTA_PAYLOAD(rta) < sizeof(*nu32)) |
| return -EINVAL; |
| if (rta->rta_type != CRYPTOA_U32) |
| return -EINVAL; |
| |
| nu32 = RTA_DATA(rta); |
| *num = nu32->num; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_attr_u32); |
| |
| void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, |
| unsigned int head) |
| { |
| struct crypto_instance *inst; |
| char *p; |
| int err; |
| |
| p = kzalloc(head + sizeof(*inst) + sizeof(struct crypto_spawn), |
| GFP_KERNEL); |
| if (!p) |
| return ERR_PTR(-ENOMEM); |
| |
| inst = (void *)(p + head); |
| |
| err = -ENAMETOOLONG; |
| if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name, |
| alg->cra_name) >= CRYPTO_MAX_ALG_NAME) |
| goto err_free_inst; |
| |
| if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", |
| name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) |
| goto err_free_inst; |
| |
| return p; |
| |
| err_free_inst: |
| kfree(p); |
| return ERR_PTR(err); |
| } |
| EXPORT_SYMBOL_GPL(crypto_alloc_instance2); |
| |
| struct crypto_instance *crypto_alloc_instance(const char *name, |
| struct crypto_alg *alg) |
| { |
| struct crypto_instance *inst; |
| struct crypto_spawn *spawn; |
| int err; |
| |
| inst = crypto_alloc_instance2(name, alg, 0); |
| if (IS_ERR(inst)) |
| goto out; |
| |
| spawn = crypto_instance_ctx(inst); |
| err = crypto_init_spawn(spawn, alg, inst, |
| CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); |
| |
| if (err) |
| goto err_free_inst; |
| |
| return inst; |
| |
| err_free_inst: |
| kfree(inst); |
| inst = ERR_PTR(err); |
| |
| out: |
| return inst; |
| } |
| EXPORT_SYMBOL_GPL(crypto_alloc_instance); |
| |
| void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen) |
| { |
| INIT_LIST_HEAD(&queue->list); |
| queue->backlog = &queue->list; |
| queue->qlen = 0; |
| queue->max_qlen = max_qlen; |
| } |
| EXPORT_SYMBOL_GPL(crypto_init_queue); |
| |
| int crypto_enqueue_request(struct crypto_queue *queue, |
| struct crypto_async_request *request) |
| { |
| int err = -EINPROGRESS; |
| |
| if (unlikely(queue->qlen >= queue->max_qlen)) { |
| err = -EBUSY; |
| if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) |
| goto out; |
| if (queue->backlog == &queue->list) |
| queue->backlog = &request->list; |
| } |
| |
| queue->qlen++; |
| list_add_tail(&request->list, &queue->list); |
| |
| out: |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(crypto_enqueue_request); |
| |
| void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset) |
| { |
| struct list_head *request; |
| |
| if (unlikely(!queue->qlen)) |
| return NULL; |
| |
| queue->qlen--; |
| |
| if (queue->backlog != &queue->list) |
| queue->backlog = queue->backlog->next; |
| |
| request = queue->list.next; |
| list_del(request); |
| |
| return (char *)list_entry(request, struct crypto_async_request, list) - |
| offset; |
| } |
| EXPORT_SYMBOL_GPL(__crypto_dequeue_request); |
| |
| struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue) |
| { |
| return __crypto_dequeue_request(queue, 0); |
| } |
| EXPORT_SYMBOL_GPL(crypto_dequeue_request); |
| |
| int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm) |
| { |
| struct crypto_async_request *req; |
| |
| list_for_each_entry(req, &queue->list, list) { |
| if (req->tfm == tfm) |
| return 1; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(crypto_tfm_in_queue); |
| |
| static inline void crypto_inc_byte(u8 *a, unsigned int size) |
| { |
| u8 *b = (a + size); |
| u8 c; |
| |
| for (; size; size--) { |
| c = *--b + 1; |
| *b = c; |
| if (c) |
| break; |
| } |
| } |
| |
| void crypto_inc(u8 *a, unsigned int size) |
| { |
| __be32 *b = (__be32 *)(a + size); |
| u32 c; |
| |
| for (; size >= 4; size -= 4) { |
| c = be32_to_cpu(*--b) + 1; |
| *b = cpu_to_be32(c); |
| if (c) |
| return; |
| } |
| |
| crypto_inc_byte(a, size); |
| } |
| EXPORT_SYMBOL_GPL(crypto_inc); |
| |
| static inline void crypto_xor_byte(u8 *a, const u8 *b, unsigned int size) |
| { |
| for (; size; size--) |
| *a++ ^= *b++; |
| } |
| |
| void crypto_xor(u8 *dst, const u8 *src, unsigned int size) |
| { |
| u32 *a = (u32 *)dst; |
| u32 *b = (u32 *)src; |
| |
| for (; size >= 4; size -= 4) |
| *a++ ^= *b++; |
| |
| crypto_xor_byte((u8 *)a, (u8 *)b, size); |
| } |
| EXPORT_SYMBOL_GPL(crypto_xor); |
| |
| unsigned int crypto_alg_extsize(struct crypto_alg *alg) |
| { |
| return alg->cra_ctxsize; |
| } |
| EXPORT_SYMBOL_GPL(crypto_alg_extsize); |
| |
| static int __init crypto_algapi_init(void) |
| { |
| crypto_init_proc(); |
| return 0; |
| } |
| |
| static void __exit crypto_algapi_exit(void) |
| { |
| crypto_exit_proc(); |
| } |
| |
| module_init(crypto_algapi_init); |
| module_exit(crypto_algapi_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Cryptographic algorithms API"); |