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crypto/algapi.c
29.2 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * Cryptographic API for algorithms (i.e., low-level API). * * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
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*/ |
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#include <crypto/algapi.h> |
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#include <linux/err.h> |
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#include <linux/errno.h> |
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#include <linux/fips.h> |
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#include <linux/init.h> #include <linux/kernel.h> |
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#include <linux/list.h> |
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#include <linux/module.h> |
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#include <linux/rtnetlink.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> #include "internal.h" |
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static LIST_HEAD(crypto_template_list); |
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static inline void crypto_check_module_sig(struct module *mod) { |
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if (fips_enabled && mod && !module_sig_ok(mod)) |
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panic("Module %s signature verification failed in FIPS mode ", |
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module_name(mod)); |
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} |
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static int crypto_check_alg(struct crypto_alg *alg) |
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{ |
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crypto_check_module_sig(alg->cra_module); |
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if (!alg->cra_name[0] || !alg->cra_driver_name[0]) return -EINVAL; |
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if (alg->cra_alignmask & (alg->cra_alignmask + 1)) return -EINVAL; |
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/* General maximums for all algs. */ if (alg->cra_alignmask > MAX_ALGAPI_ALIGNMASK) |
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return -EINVAL; |
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if (alg->cra_blocksize > MAX_ALGAPI_BLOCKSIZE) return -EINVAL; /* Lower maximums for specific alg types. */ |
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if (!alg->cra_type && (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_CIPHER) { if (alg->cra_alignmask > MAX_CIPHER_ALIGNMASK) return -EINVAL; if (alg->cra_blocksize > MAX_CIPHER_BLOCKSIZE) return -EINVAL; } |
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if (alg->cra_priority < 0) return -EINVAL; |
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|
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refcount_set(&alg->cra_refcnt, 1); |
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return 0; |
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} |
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static void crypto_free_instance(struct crypto_instance *inst) { |
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inst->alg.cra_type->free(inst); } |
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static void crypto_destroy_instance(struct crypto_alg *alg) { struct crypto_instance *inst = (void *)alg; struct crypto_template *tmpl = inst->tmpl; |
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crypto_free_instance(inst); |
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crypto_tmpl_put(tmpl); } |
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/* * This function adds a spawn to the list secondary_spawns which * will be used at the end of crypto_remove_spawns to unregister * instances, unless the spawn happens to be one that is depended * on by the new algorithm (nalg in crypto_remove_spawns). * * This function is also responsible for resurrecting any algorithms * in the dependency chain of nalg by unsetting n->dead. */ |
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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; |
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spawn = list_first_entry_or_null(stack, struct crypto_spawn, list); if (!spawn) |
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return NULL; |
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n = list_prev_entry(spawn, list); list_move(&spawn->list, secondary_spawns); |
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if (list_is_last(&n->list, stack)) return top; |
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n = list_next_entry(n, list); if (!spawn->dead) n->dead = false; |
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return &n->inst->alg.cra_users; |
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} |
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static void crypto_remove_instance(struct crypto_instance *inst, struct list_head *list) |
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{ |
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struct crypto_template *tmpl = inst->tmpl; |
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if (crypto_is_dead(&inst->alg)) return; |
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inst->alg.cra_flags |= CRYPTO_ALG_DEAD; |
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if (!tmpl || !crypto_tmpl_get(tmpl)) return; |
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list_move(&inst->alg.cra_list, list); hlist_del(&inst->list); inst->alg.cra_destroy = crypto_destroy_instance; |
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BUG_ON(!list_empty(&inst->alg.cra_users)); |
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} |
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/* * Given an algorithm alg, remove all algorithms that depend on it * through spawns. If nalg is not null, then exempt any algorithms * that is depended on by nalg. This is useful when nalg itself * depends on alg. */ |
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void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, struct crypto_alg *nalg) |
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{ |
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u32 new_type = (nalg ?: alg)->cra_flags; |
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struct crypto_spawn *spawn, *n; LIST_HEAD(secondary_spawns); |
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struct list_head *spawns; LIST_HEAD(stack); LIST_HEAD(top); |
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spawns = &alg->cra_users; |
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list_for_each_entry_safe(spawn, n, spawns, list) { if ((spawn->alg->cra_flags ^ new_type) & spawn->mask) |
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continue; |
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list_move(&spawn->list, &top); |
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} |
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/* * Perform a depth-first walk starting from alg through * the cra_users tree. The list stack records the path * from alg to the current spawn. */ |
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spawns = ⊤ do { while (!list_empty(spawns)) { struct crypto_instance *inst; spawn = list_first_entry(spawns, struct crypto_spawn, list); inst = spawn->inst; |
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list_move(&spawn->list, &stack); |
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spawn->dead = !spawn->registered || &inst->alg != nalg; if (!spawn->registered) break; BUG_ON(&inst->alg == alg); |
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if (&inst->alg == nalg) break; |
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spawns = &inst->alg.cra_users; |
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/* |
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* Even if spawn->registered is true, the * instance itself may still be unregistered. * This is because it may have failed during * registration. Therefore we still need to * make the following test. * |
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* We may encounter an unregistered instance here, since * an instance's spawns are set up prior to the instance * being registered. An unregistered instance will have * NULL ->cra_users.next, since ->cra_users isn't * properly initialized until registration. But an * unregistered instance cannot have any users, so treat * it the same as ->cra_users being empty. */ if (spawns->next == NULL) break; |
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} } while ((spawns = crypto_more_spawns(alg, &stack, &top, &secondary_spawns))); |
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/* * Remove all instances that are marked as dead. Also * complete the resurrection of the others by moving them * back to the cra_users list. */ |
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list_for_each_entry_safe(spawn, n, &secondary_spawns, list) { |
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if (!spawn->dead) |
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list_move(&spawn->list, &spawn->alg->cra_users); |
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else if (spawn->registered) |
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crypto_remove_instance(spawn->inst, list); |
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} } |
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EXPORT_SYMBOL_GPL(crypto_remove_spawns); |
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static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg) |
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{ struct crypto_alg *q; |
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struct crypto_larval *larval; |
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int ret = -EAGAIN; if (crypto_is_dead(alg)) |
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goto err; |
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INIT_LIST_HEAD(&alg->cra_users); |
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/* No cheating! */ alg->cra_flags &= ~CRYPTO_ALG_TESTED; |
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ret = -EEXIST; |
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list_for_each_entry(q, &crypto_alg_list, cra_list) { |
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if (q == alg) |
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goto err; |
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if (crypto_is_moribund(q)) continue; |
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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; |
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refcount_set(&larval->alg.cra_refcnt, 1); |
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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); |
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crypto_stats_init(alg); |
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out: |
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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); |
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bool best; |
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down_write(&crypto_alg_sem); list_for_each_entry(q, &crypto_alg_list, cra_list) { |
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if (crypto_is_moribund(q) || !crypto_is_larval(q)) |
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continue; test = (struct crypto_larval *)q; if (!strcmp(q->cra_driver_name, name)) goto found; } |
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pr_err("alg: Unexpected test result for %s: %d ", name, err); |
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goto unlock; found: |
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q->cra_flags |= CRYPTO_ALG_DEAD; |
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alg = test->adult; if (err || list_empty(&alg->cra_list)) goto complete; alg->cra_flags |= CRYPTO_ALG_TESTED; |
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/* Only satisfy larval waiters if we are the best. */ best = true; list_for_each_entry(q, &crypto_alg_list, cra_list) { if (crypto_is_moribund(q) || !crypto_is_larval(q)) continue; if (strcmp(alg->cra_name, q->cra_name)) continue; if (q->cra_priority > alg->cra_priority) { best = false; break; } } |
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list_for_each_entry(q, &crypto_alg_list, cra_list) { if (q == alg) continue; |
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if (crypto_is_moribund(q)) continue; if (crypto_is_larval(q)) { |
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struct crypto_larval *larval = (void *)q; |
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/* * Check to see if either our generic name or * specific name can satisfy the name requested * by the larval entry q. */ |
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if (strcmp(alg->cra_name, q->cra_name) && strcmp(alg->cra_driver_name, q->cra_name)) continue; if (larval->adult) continue; |
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if ((q->cra_flags ^ alg->cra_flags) & larval->mask) continue; |
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if (best && crypto_mod_get(alg)) larval->adult = alg; else larval->adult = ERR_PTR(-EAGAIN); |
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continue; |
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} |
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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; |
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crypto_remove_spawns(q, &list, alg); |
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} |
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complete: complete_all(&test->completion); |
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unlock: up_write(&crypto_alg_sem); crypto_remove_final(&list); |
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} |
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EXPORT_SYMBOL_GPL(crypto_alg_tested); |
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void crypto_remove_final(struct list_head *list) |
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{ 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); } } |
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EXPORT_SYMBOL_GPL(crypto_remove_final); |
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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); } |
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err = wait_for_completion_killable(&larval->completion); |
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WARN_ON(err); |
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if (!err) |
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crypto_notify(CRYPTO_MSG_ALG_LOADED, larval); |
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out: crypto_larval_kill(&larval->alg); } |
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int crypto_register_alg(struct crypto_alg *alg) { |
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struct crypto_larval *larval; |
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int err; |
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alg->cra_flags &= ~CRYPTO_ALG_DEAD; |
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err = crypto_check_alg(alg); if (err) return err; down_write(&crypto_alg_sem); |
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larval = __crypto_register_alg(alg); |
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up_write(&crypto_alg_sem); |
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if (IS_ERR(larval)) return PTR_ERR(larval); crypto_wait_for_test(larval); return 0; |
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} |
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EXPORT_SYMBOL_GPL(crypto_register_alg); |
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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; |
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list_del_init(&alg->cra_list); |
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crypto_remove_spawns(alg, list, NULL); |
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return 0; } |
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void crypto_unregister_alg(struct crypto_alg *alg) |
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{ |
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int ret; LIST_HEAD(list); |
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down_write(&crypto_alg_sem); |
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ret = crypto_remove_alg(alg, &list); |
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up_write(&crypto_alg_sem); |
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if (WARN(ret, "Algorithm %s is not registered", alg->cra_driver_name)) return; |
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BUG_ON(refcount_read(&alg->cra_refcnt) != 1); |
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if (alg->cra_destroy) alg->cra_destroy(alg); |
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crypto_remove_final(&list); |
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} EXPORT_SYMBOL_GPL(crypto_unregister_alg); |
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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); |
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void crypto_unregister_algs(struct crypto_alg *algs, int count) |
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{ |
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int i; |
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for (i = 0; i < count; i++) crypto_unregister_alg(&algs[i]); |
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} EXPORT_SYMBOL_GPL(crypto_unregister_algs); |
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int crypto_register_template(struct crypto_template *tmpl) { struct crypto_template *q; int err = -EEXIST; down_write(&crypto_alg_sem); |
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crypto_check_module_sig(tmpl->module); |
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list_for_each_entry(q, &crypto_template_list, list) { if (q == tmpl) goto out; } list_add(&tmpl->list, &crypto_template_list); err = 0; out: up_write(&crypto_alg_sem); return err; } EXPORT_SYMBOL_GPL(crypto_register_template); |
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int crypto_register_templates(struct crypto_template *tmpls, int count) { int i, err; for (i = 0; i < count; i++) { err = crypto_register_template(&tmpls[i]); if (err) goto out; } return 0; out: for (--i; i >= 0; --i) crypto_unregister_template(&tmpls[i]); return err; } EXPORT_SYMBOL_GPL(crypto_register_templates); |
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void crypto_unregister_template(struct crypto_template *tmpl) { struct crypto_instance *inst; |
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struct hlist_node *n; |
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struct hlist_head *list; |
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LIST_HEAD(users); |
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down_write(&crypto_alg_sem); BUG_ON(list_empty(&tmpl->list)); list_del_init(&tmpl->list); list = &tmpl->instances; |
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hlist_for_each_entry(inst, list, list) { |
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int err = crypto_remove_alg(&inst->alg, &users); |
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BUG_ON(err); |
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} up_write(&crypto_alg_sem); |
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hlist_for_each_entry_safe(inst, n, list, list) { |
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BUG_ON(refcount_read(&inst->alg.cra_refcnt) != 1); |
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crypto_free_instance(inst); |
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} |
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crypto_remove_final(&users); |
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} EXPORT_SYMBOL_GPL(crypto_unregister_template); |
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void crypto_unregister_templates(struct crypto_template *tmpls, int count) { int i; for (i = count - 1; i >= 0; --i) crypto_unregister_template(&tmpls[i]); } EXPORT_SYMBOL_GPL(crypto_unregister_templates); |
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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) { |
4943ba16b
|
543 544 |
return try_then_request_module(__crypto_lookup_template(name), "crypto-%s", name); |
4cc7720cd
|
545 546 547 548 549 550 |
} EXPORT_SYMBOL_GPL(crypto_lookup_template); int crypto_register_instance(struct crypto_template *tmpl, struct crypto_instance *inst) { |
73d3864a4
|
551 |
struct crypto_larval *larval; |
5f567fffa
|
552 |
struct crypto_spawn *spawn; |
73d3864a4
|
553 |
int err; |
4cc7720cd
|
554 |
|
4cc7720cd
|
555 556 |
err = crypto_check_alg(&inst->alg); if (err) |
9c521a200
|
557 |
return err; |
4cc7720cd
|
558 |
inst->alg.cra_module = tmpl->module; |
64a947b13
|
559 |
inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE; |
4cc7720cd
|
560 561 |
down_write(&crypto_alg_sem); |
5f567fffa
|
562 563 564 565 566 567 568 569 570 571 |
larval = ERR_PTR(-EAGAIN); for (spawn = inst->spawns; spawn;) { struct crypto_spawn *next; if (spawn->dead) goto unlock; next = spawn->next; spawn->inst = inst; spawn->registered = true; |
aed11cf57
|
572 |
crypto_mod_put(spawn->alg); |
5f567fffa
|
573 574 575 |
spawn = next; } |
73d3864a4
|
576 577 |
larval = __crypto_register_alg(&inst->alg); if (IS_ERR(larval)) |
4cc7720cd
|
578 579 580 581 582 583 584 |
goto unlock; hlist_add_head(&inst->list, &tmpl->instances); inst->tmpl = tmpl; unlock: up_write(&crypto_alg_sem); |
73d3864a4
|
585 586 587 588 589 590 |
err = PTR_ERR(larval); if (IS_ERR(larval)) goto err; crypto_wait_for_test(larval); err = 0; |
6bfd48096
|
591 |
|
4cc7720cd
|
592 593 594 595 |
err: return err; } EXPORT_SYMBOL_GPL(crypto_register_instance); |
ce3fd840f
|
596 |
|
c6d633a92
|
597 |
void crypto_unregister_instance(struct crypto_instance *inst) |
ce3fd840f
|
598 |
{ |
1f7237109
|
599 |
LIST_HEAD(list); |
ce3fd840f
|
600 |
|
ce3fd840f
|
601 |
down_write(&crypto_alg_sem); |
87b167563
|
602 |
crypto_remove_spawns(&inst->alg, &list, NULL); |
1f7237109
|
603 |
crypto_remove_instance(inst, &list); |
ce3fd840f
|
604 605 |
up_write(&crypto_alg_sem); |
1f7237109
|
606 |
crypto_remove_final(&list); |
ce3fd840f
|
607 608 |
} EXPORT_SYMBOL_GPL(crypto_unregister_instance); |
4cc7720cd
|
609 |
|
aed11cf57
|
610 611 |
int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst, const char *name, u32 type, u32 mask) |
6bfd48096
|
612 |
{ |
aed11cf57
|
613 |
struct crypto_alg *alg; |
6bfd48096
|
614 |
int err = -EAGAIN; |
6b476662b
|
615 616 |
if (WARN_ON_ONCE(inst == NULL)) return -EINVAL; |
aed11cf57
|
617 618 619 |
/* Allow the result of crypto_attr_alg_name() to be passed directly */ if (IS_ERR(name)) return PTR_ERR(name); |
5f567fffa
|
620 |
|
aed11cf57
|
621 622 623 |
alg = crypto_find_alg(name, spawn->frontend, type, mask); if (IS_ERR(alg)) return PTR_ERR(alg); |
6bfd48096
|
624 625 626 627 628 |
down_write(&crypto_alg_sem); if (!crypto_is_moribund(alg)) { list_add(&spawn->list, &alg->cra_users); spawn->alg = alg; |
aed11cf57
|
629 630 631 |
spawn->mask = mask; spawn->next = inst->spawns; inst->spawns = spawn; |
7bcb2c99f
|
632 633 |
inst->alg.cra_flags |= (alg->cra_flags & CRYPTO_ALG_INHERITED_FLAGS); |
6bfd48096
|
634 635 636 |
err = 0; } up_write(&crypto_alg_sem); |
5f567fffa
|
637 638 |
if (err) crypto_mod_put(alg); |
d6ef2f198
|
639 640 641 |
return err; } EXPORT_SYMBOL_GPL(crypto_grab_spawn); |
6bfd48096
|
642 643 |
void crypto_drop_spawn(struct crypto_spawn *spawn) { |
ff6706279
|
644 645 |
if (!spawn->alg) /* not yet initialized? */ return; |
6bfd48096
|
646 |
down_write(&crypto_alg_sem); |
4f87ee118
|
647 |
if (!spawn->dead) |
7db3b61b6
|
648 |
list_del(&spawn->list); |
6bfd48096
|
649 |
up_write(&crypto_alg_sem); |
5f567fffa
|
650 |
|
aed11cf57
|
651 |
if (!spawn->registered) |
5f567fffa
|
652 |
crypto_mod_put(spawn->alg); |
6bfd48096
|
653 654 |
} EXPORT_SYMBOL_GPL(crypto_drop_spawn); |
97eedce1a
|
655 |
static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn) |
6bfd48096
|
656 |
{ |
6603523bf
|
657 658 659 |
struct crypto_alg *alg = ERR_PTR(-EAGAIN); struct crypto_alg *target; bool shoot = false; |
6bfd48096
|
660 661 |
down_read(&crypto_alg_sem); |
6603523bf
|
662 663 664 665 666 667 668 |
if (!spawn->dead) { alg = spawn->alg; if (!crypto_mod_get(alg)) { target = crypto_alg_get(alg); shoot = true; alg = ERR_PTR(-EAGAIN); } |
6bfd48096
|
669 |
} |
73669cc55
|
670 |
up_read(&crypto_alg_sem); |
6bfd48096
|
671 |
|
6603523bf
|
672 673 674 675 676 677 |
if (shoot) { crypto_shoot_alg(target); crypto_alg_put(target); } return alg; |
97eedce1a
|
678 679 680 681 682 683 684 685 686 687 688 |
} 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); |
2e306ee01
|
689 690 691 |
tfm = ERR_PTR(-EINVAL); if (unlikely((alg->cra_flags ^ type) & mask)) goto out_put_alg; |
27d2a3300
|
692 |
tfm = __crypto_alloc_tfm(alg, type, mask); |
6bfd48096
|
693 |
if (IS_ERR(tfm)) |
2e306ee01
|
694 695 696 |
goto out_put_alg; return tfm; |
6bfd48096
|
697 |
|
2e306ee01
|
698 699 |
out_put_alg: crypto_mod_put(alg); |
6bfd48096
|
700 701 702 |
return tfm; } EXPORT_SYMBOL_GPL(crypto_spawn_tfm); |
97eedce1a
|
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 |
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); |
2825982d9
|
723 724 725 726 727 728 729 730 731 732 733 |
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); |
ebc610e5b
|
734 |
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) |
7fed0bf27
|
735 |
{ |
39e1ee011
|
736 |
struct rtattr *rta = tb[0]; |
ebc610e5b
|
737 738 739 740 741 742 |
struct crypto_attr_type *algt; if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*algt)) return ERR_PTR(-EINVAL); |
39e1ee011
|
743 744 |
if (rta->rta_type != CRYPTOA_TYPE) return ERR_PTR(-EINVAL); |
ebc610e5b
|
745 746 747 748 749 750 |
algt = RTA_DATA(rta); return algt; } EXPORT_SYMBOL_GPL(crypto_get_attr_type); |
7bcb2c99f
|
751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 |
/** * crypto_check_attr_type() - check algorithm type and compute inherited mask * @tb: the template parameters * @type: the algorithm type the template would be instantiated as * @mask_ret: (output) the mask that should be passed to crypto_grab_*() * to restrict the flags of any inner algorithms * * Validate that the algorithm type the user requested is compatible with the * one the template would actually be instantiated as. E.g., if the user is * doing crypto_alloc_shash("cbc(aes)", ...), this would return an error because * the "cbc" template creates an "skcipher" algorithm, not an "shash" algorithm. * * Also compute the mask to use to restrict the flags of any inner algorithms. * * Return: 0 on success; -errno on failure */ int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret) |
ebc610e5b
|
768 769 770 771 772 773 774 775 776 |
{ 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; |
7bcb2c99f
|
777 |
*mask_ret = crypto_algt_inherited_mask(algt); |
ebc610e5b
|
778 779 780 |
return 0; } EXPORT_SYMBOL_GPL(crypto_check_attr_type); |
68b6c7d69
|
781 |
const char *crypto_attr_alg_name(struct rtattr *rta) |
ebc610e5b
|
782 |
{ |
7fed0bf27
|
783 |
struct crypto_attr_alg *alga; |
ebc610e5b
|
784 785 786 |
if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*alga)) |
7fed0bf27
|
787 |
return ERR_PTR(-EINVAL); |
39e1ee011
|
788 789 |
if (rta->rta_type != CRYPTOA_ALG) return ERR_PTR(-EINVAL); |
7fed0bf27
|
790 791 792 |
alga = RTA_DATA(rta); alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; |
68b6c7d69
|
793 794 795 |
return alga->name; } EXPORT_SYMBOL_GPL(crypto_attr_alg_name); |
32f27c745
|
796 797 798 799 800 801 802 803 804 805 806 807 808 809 |
int crypto_inst_setname(struct crypto_instance *inst, const char *name, struct crypto_alg *alg) { if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name, alg->cra_name) >= CRYPTO_MAX_ALG_NAME) return -ENAMETOOLONG; if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", name, alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) return -ENAMETOOLONG; return 0; } EXPORT_SYMBOL_GPL(crypto_inst_setname); |
b5b7f0886
|
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 |
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)) { |
6b80ea389
|
825 826 |
if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { err = -ENOSPC; |
b5b7f0886
|
827 |
goto out; |
6b80ea389
|
828 829 |
} err = -EBUSY; |
b5b7f0886
|
830 831 832 833 834 835 836 837 838 839 840 |
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); |
ec6e2bf33
|
841 842 843 844 845 846 847 |
void crypto_enqueue_request_head(struct crypto_queue *queue, struct crypto_async_request *request) { queue->qlen++; list_add(&request->list, &queue->list); } EXPORT_SYMBOL_GPL(crypto_enqueue_request_head); |
31d228cc6
|
848 |
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue) |
b5b7f0886
|
849 850 851 852 853 854 855 856 857 858 859 860 861 |
{ 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); |
31d228cc6
|
862 |
return list_entry(request, struct crypto_async_request, list); |
b5b7f0886
|
863 864 |
} EXPORT_SYMBOL_GPL(crypto_dequeue_request); |
7613636de
|
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 |
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; |
db91af0fb
|
882 |
if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) || |
27c539aef
|
883 |
IS_ALIGNED((unsigned long)b, __alignof__(*b))) |
db91af0fb
|
884 885 886 |
for (; size >= 4; size -= 4) { c = be32_to_cpu(*--b) + 1; *b = cpu_to_be32(c); |
27c539aef
|
887 |
if (likely(c)) |
db91af0fb
|
888 889 |
return; } |
7613636de
|
890 891 892 893 |
crypto_inc_byte(a, size); } EXPORT_SYMBOL_GPL(crypto_inc); |
a7c391f04
|
894 |
void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int len) |
7613636de
|
895 |
{ |
db91af0fb
|
896 897 898 899 |
int relalign = 0; if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)) { int size = sizeof(unsigned long); |
a7c391f04
|
900 901 902 |
int d = (((unsigned long)dst ^ (unsigned long)src1) | ((unsigned long)dst ^ (unsigned long)src2)) & (size - 1); |
db91af0fb
|
903 904 905 906 907 908 909 910 911 912 |
relalign = d ? 1 << __ffs(d) : size; /* * If we care about alignment, process as many bytes as * needed to advance dst and src to values whose alignments * equal their relative alignment. This will allow us to * process the remainder of the input using optimal strides. */ while (((unsigned long)dst & (relalign - 1)) && len > 0) { |
a7c391f04
|
913 |
*dst++ = *src1++ ^ *src2++; |
db91af0fb
|
914 915 916 |
len--; } } |
7613636de
|
917 |
|
db91af0fb
|
918 |
while (IS_ENABLED(CONFIG_64BIT) && len >= 8 && !(relalign & 7)) { |
a7c391f04
|
919 |
*(u64 *)dst = *(u64 *)src1 ^ *(u64 *)src2; |
db91af0fb
|
920 |
dst += 8; |
a7c391f04
|
921 922 |
src1 += 8; src2 += 8; |
db91af0fb
|
923 924 |
len -= 8; } |
7613636de
|
925 |
|
db91af0fb
|
926 |
while (len >= 4 && !(relalign & 3)) { |
a7c391f04
|
927 |
*(u32 *)dst = *(u32 *)src1 ^ *(u32 *)src2; |
db91af0fb
|
928 |
dst += 4; |
a7c391f04
|
929 930 |
src1 += 4; src2 += 4; |
db91af0fb
|
931 932 933 934 |
len -= 4; } while (len >= 2 && !(relalign & 1)) { |
a7c391f04
|
935 |
*(u16 *)dst = *(u16 *)src1 ^ *(u16 *)src2; |
db91af0fb
|
936 |
dst += 2; |
a7c391f04
|
937 938 |
src1 += 2; src2 += 2; |
db91af0fb
|
939 940 |
len -= 2; } |
7613636de
|
941 |
|
db91af0fb
|
942 |
while (len--) |
a7c391f04
|
943 |
*dst++ = *src1++ ^ *src2++; |
7613636de
|
944 |
} |
db91af0fb
|
945 |
EXPORT_SYMBOL_GPL(__crypto_xor); |
7613636de
|
946 |
|
38d214331
|
947 948 |
unsigned int crypto_alg_extsize(struct crypto_alg *alg) { |
c2110f283
|
949 950 |
return alg->cra_ctxsize + (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
38d214331
|
951 952 |
} EXPORT_SYMBOL_GPL(crypto_alg_extsize); |
f2aefdab5
|
953 954 955 956 957 958 959 960 961 962 963 964 965 966 |
int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, u32 type, u32 mask) { int ret = 0; struct crypto_alg *alg = crypto_find_alg(name, frontend, type, mask); if (!IS_ERR(alg)) { crypto_mod_put(alg); ret = 1; } return ret; } EXPORT_SYMBOL_GPL(crypto_type_has_alg); |
f7d76e05d
|
967 |
#ifdef CONFIG_CRYPTO_STATS |
1f6669b97
|
968 969 970 971 972 |
void crypto_stats_init(struct crypto_alg *alg) { memset(&alg->stats, 0, sizeof(alg->stats)); } EXPORT_SYMBOL_GPL(crypto_stats_init); |
f7d76e05d
|
973 974 975 976 977 |
void crypto_stats_get(struct crypto_alg *alg) { crypto_alg_get(alg); } EXPORT_SYMBOL_GPL(crypto_stats_get); |
f7d76e05d
|
978 979 980 981 |
void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
982 |
atomic64_inc(&alg->stats.aead.err_cnt); |
f7d76e05d
|
983 |
} else { |
17c18f9e3
|
984 985 |
atomic64_inc(&alg->stats.aead.encrypt_cnt); atomic64_add(cryptlen, &alg->stats.aead.encrypt_tlen); |
f7d76e05d
|
986 987 988 989 990 991 992 993 994 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_aead_encrypt); void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
995 |
atomic64_inc(&alg->stats.aead.err_cnt); |
f7d76e05d
|
996 |
} else { |
17c18f9e3
|
997 998 |
atomic64_inc(&alg->stats.aead.decrypt_cnt); atomic64_add(cryptlen, &alg->stats.aead.decrypt_tlen); |
f7d76e05d
|
999 1000 1001 1002 1003 1004 1005 1006 1007 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_aead_decrypt); void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1008 |
atomic64_inc(&alg->stats.akcipher.err_cnt); |
f7d76e05d
|
1009 |
} else { |
17c18f9e3
|
1010 1011 |
atomic64_inc(&alg->stats.akcipher.encrypt_cnt); atomic64_add(src_len, &alg->stats.akcipher.encrypt_tlen); |
f7d76e05d
|
1012 1013 1014 1015 1016 1017 1018 1019 1020 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_akcipher_encrypt); void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1021 |
atomic64_inc(&alg->stats.akcipher.err_cnt); |
f7d76e05d
|
1022 |
} else { |
17c18f9e3
|
1023 1024 |
atomic64_inc(&alg->stats.akcipher.decrypt_cnt); atomic64_add(src_len, &alg->stats.akcipher.decrypt_tlen); |
f7d76e05d
|
1025 1026 1027 1028 1029 1030 1031 1032 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_akcipher_decrypt); void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) |
44f13133c
|
1033 |
atomic64_inc(&alg->stats.akcipher.err_cnt); |
f7d76e05d
|
1034 |
else |
17c18f9e3
|
1035 |
atomic64_inc(&alg->stats.akcipher.sign_cnt); |
f7d76e05d
|
1036 1037 1038 1039 1040 1041 1042 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_akcipher_sign); void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) |
44f13133c
|
1043 |
atomic64_inc(&alg->stats.akcipher.err_cnt); |
f7d76e05d
|
1044 |
else |
17c18f9e3
|
1045 |
atomic64_inc(&alg->stats.akcipher.verify_cnt); |
f7d76e05d
|
1046 1047 1048 1049 1050 1051 1052 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_akcipher_verify); void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1053 |
atomic64_inc(&alg->stats.compress.err_cnt); |
f7d76e05d
|
1054 |
} else { |
17c18f9e3
|
1055 1056 |
atomic64_inc(&alg->stats.compress.compress_cnt); atomic64_add(slen, &alg->stats.compress.compress_tlen); |
f7d76e05d
|
1057 1058 1059 1060 1061 1062 1063 1064 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_compress); void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1065 |
atomic64_inc(&alg->stats.compress.err_cnt); |
f7d76e05d
|
1066 |
} else { |
17c18f9e3
|
1067 1068 |
atomic64_inc(&alg->stats.compress.decompress_cnt); atomic64_add(slen, &alg->stats.compress.decompress_tlen); |
f7d76e05d
|
1069 1070 1071 1072 1073 1074 1075 1076 1077 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_decompress); void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) |
44f13133c
|
1078 |
atomic64_inc(&alg->stats.hash.err_cnt); |
f7d76e05d
|
1079 |
else |
17c18f9e3
|
1080 |
atomic64_add(nbytes, &alg->stats.hash.hash_tlen); |
f7d76e05d
|
1081 1082 1083 1084 1085 1086 1087 1088 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_ahash_update); void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1089 |
atomic64_inc(&alg->stats.hash.err_cnt); |
f7d76e05d
|
1090 |
} else { |
17c18f9e3
|
1091 1092 |
atomic64_inc(&alg->stats.hash.hash_cnt); atomic64_add(nbytes, &alg->stats.hash.hash_tlen); |
f7d76e05d
|
1093 1094 1095 1096 1097 1098 1099 1100 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_ahash_final); void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret) { if (ret) |
44f13133c
|
1101 |
atomic64_inc(&alg->stats.kpp.err_cnt); |
f7d76e05d
|
1102 |
else |
17c18f9e3
|
1103 |
atomic64_inc(&alg->stats.kpp.setsecret_cnt); |
f7d76e05d
|
1104 1105 1106 1107 1108 1109 1110 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_kpp_set_secret); void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret) { if (ret) |
44f13133c
|
1111 |
atomic64_inc(&alg->stats.kpp.err_cnt); |
f7d76e05d
|
1112 |
else |
17c18f9e3
|
1113 |
atomic64_inc(&alg->stats.kpp.generate_public_key_cnt); |
f7d76e05d
|
1114 1115 1116 1117 1118 1119 1120 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_kpp_generate_public_key); void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret) { if (ret) |
44f13133c
|
1121 |
atomic64_inc(&alg->stats.kpp.err_cnt); |
f7d76e05d
|
1122 |
else |
17c18f9e3
|
1123 |
atomic64_inc(&alg->stats.kpp.compute_shared_secret_cnt); |
f7d76e05d
|
1124 1125 1126 1127 1128 1129 1130 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_kpp_compute_shared_secret); void crypto_stats_rng_seed(struct crypto_alg *alg, int ret) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) |
44f13133c
|
1131 |
atomic64_inc(&alg->stats.rng.err_cnt); |
f7d76e05d
|
1132 |
else |
17c18f9e3
|
1133 |
atomic64_inc(&alg->stats.rng.seed_cnt); |
f7d76e05d
|
1134 1135 1136 1137 1138 1139 1140 1141 |
crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_rng_seed); void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1142 |
atomic64_inc(&alg->stats.rng.err_cnt); |
f7d76e05d
|
1143 |
} else { |
17c18f9e3
|
1144 1145 |
atomic64_inc(&alg->stats.rng.generate_cnt); atomic64_add(dlen, &alg->stats.rng.generate_tlen); |
f7d76e05d
|
1146 1147 1148 1149 1150 1151 1152 1153 1154 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_rng_generate); void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1155 |
atomic64_inc(&alg->stats.cipher.err_cnt); |
f7d76e05d
|
1156 |
} else { |
17c18f9e3
|
1157 1158 |
atomic64_inc(&alg->stats.cipher.encrypt_cnt); atomic64_add(cryptlen, &alg->stats.cipher.encrypt_tlen); |
f7d76e05d
|
1159 1160 1161 1162 1163 1164 1165 1166 1167 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_skcipher_encrypt); void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg) { if (ret && ret != -EINPROGRESS && ret != -EBUSY) { |
44f13133c
|
1168 |
atomic64_inc(&alg->stats.cipher.err_cnt); |
f7d76e05d
|
1169 |
} else { |
17c18f9e3
|
1170 1171 |
atomic64_inc(&alg->stats.cipher.decrypt_cnt); atomic64_add(cryptlen, &alg->stats.cipher.decrypt_tlen); |
f7d76e05d
|
1172 1173 1174 1175 1176 |
} crypto_alg_put(alg); } EXPORT_SYMBOL_GPL(crypto_stats_skcipher_decrypt); #endif |
cce9e06d1
|
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 |
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"); |
40eb05e5e
|
1193 |
MODULE_SOFTDEP("pre: cryptomgr"); |