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crypto/algapi.c
22.5 KB
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/* * 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. * */ |
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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 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; } |
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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_alignmask & (alg->cra_alignmask + 1)) return -EINVAL; |
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if (alg->cra_blocksize > PAGE_SIZE / 8) return -EINVAL; if (alg->cra_priority < 0) return -EINVAL; |
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|
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atomic_set(&alg->cra_refcnt, 1); |
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return crypto_set_driver_name(alg); } |
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static void crypto_free_instance(struct crypto_instance *inst) { if (!inst->alg.cra_type->free) { inst->tmpl->free(inst); return; } 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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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_next_entry(spawn, list); |
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if (spawn->alg && &n->list != stack && !n->alg) n->alg = (n->list.next == stack) ? alg : |
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&list_next_entry(n, list)->inst->alg; |
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list_move(&spawn->list, secondary_spawns); return &n->list == stack ? top : &n->inst->alg.cra_users; } |
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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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|
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if (crypto_is_dead(&inst->alg)) return; |
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|
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inst->alg.cra_flags |= CRYPTO_ALG_DEAD; |
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if (hlist_unhashed(&inst->list)) return; |
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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; |
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BUG_ON(!list_empty(&inst->alg.cra_users)); |
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} |
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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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|
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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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|
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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; BUG_ON(&inst->alg == alg); list_move(&spawn->list, &stack); if (&inst->alg == nalg) break; spawn->alg = NULL; spawns = &inst->alg.cra_users; |
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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))); list_for_each_entry_safe(spawn, n, &secondary_spawns, list) { if (spawn->alg) list_move(&spawn->list, &spawn->alg->cra_users); else |
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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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|
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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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|
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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; 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); |
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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); 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; 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 (!crypto_mod_get(alg)) continue; |
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|
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larval->adult = alg; |
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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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|
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complete: complete_all(&test->completion); |
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|
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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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|
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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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|
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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); 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; crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg); 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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int crypto_unregister_alg(struct crypto_alg *alg) { |
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int ret; LIST_HEAD(list); |
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|
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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); if (ret) return ret; BUG_ON(atomic_read(&alg->cra_refcnt) != 1); if (alg->cra_destroy) alg->cra_destroy(alg); |
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crypto_remove_final(&list); |
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return 0; } 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); 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 ", algs[i].cra_driver_name, algs[i].cra_name, ret); } return 0; } 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); |
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crypto_notify(CRYPTO_MSG_TMPL_REGISTER, tmpl); |
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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; |
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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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|
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BUG_ON(err); |
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} |
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crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER, tmpl); |
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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(atomic_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); 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) { |
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return try_then_request_module(__crypto_lookup_template(name), "crypto-%s", name); |
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} EXPORT_SYMBOL_GPL(crypto_lookup_template); int crypto_register_instance(struct crypto_template *tmpl, struct crypto_instance *inst) { |
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struct crypto_larval *larval; int err; |
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|
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err = crypto_check_alg(&inst->alg); if (err) |
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return err; |
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inst->alg.cra_module = tmpl->module; |
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inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE; |
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if (unlikely(!crypto_mod_get(&inst->alg))) return -EAGAIN; |
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down_write(&crypto_alg_sem); |
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larval = __crypto_register_alg(&inst->alg); if (IS_ERR(larval)) |
4cc7720cd [CRYPTO] api: Add... |
517 518 519 520 521 522 523 |
goto unlock; hlist_add_head(&inst->list, &tmpl->instances); inst->tmpl = tmpl; unlock: up_write(&crypto_alg_sem); |
73d3864a4 crypto: api - Use... |
524 525 526 527 528 |
err = PTR_ERR(larval); if (IS_ERR(larval)) goto err; crypto_wait_for_test(larval); |
9c521a200 crypto: api - rem... |
529 530 531 532 |
/* Remove instance if test failed */ if (!(inst->alg.cra_flags & CRYPTO_ALG_TESTED)) crypto_unregister_instance(inst); |
73d3864a4 crypto: api - Use... |
533 |
err = 0; |
6bfd48096 [CRYPTO] api: Add... |
534 |
|
4cc7720cd [CRYPTO] api: Add... |
535 |
err: |
9c521a200 crypto: api - rem... |
536 |
crypto_mod_put(&inst->alg); |
4cc7720cd [CRYPTO] api: Add... |
537 538 539 |
return err; } EXPORT_SYMBOL_GPL(crypto_register_instance); |
ce3fd840f crypto: Unlink an... |
540 |
|
87b167563 crypto: api - Cha... |
541 |
int crypto_unregister_instance(struct crypto_instance *inst) |
ce3fd840f crypto: Unlink an... |
542 |
{ |
1f7237109 crypto: api - Fix... |
543 |
LIST_HEAD(list); |
ce3fd840f crypto: Unlink an... |
544 |
|
ce3fd840f crypto: Unlink an... |
545 |
down_write(&crypto_alg_sem); |
87b167563 crypto: api - Cha... |
546 |
crypto_remove_spawns(&inst->alg, &list, NULL); |
1f7237109 crypto: api - Fix... |
547 |
crypto_remove_instance(inst, &list); |
ce3fd840f crypto: Unlink an... |
548 549 |
up_write(&crypto_alg_sem); |
1f7237109 crypto: api - Fix... |
550 |
crypto_remove_final(&list); |
ce3fd840f crypto: Unlink an... |
551 552 553 554 |
return 0; } EXPORT_SYMBOL_GPL(crypto_unregister_instance); |
4cc7720cd [CRYPTO] api: Add... |
555 |
|
6bfd48096 [CRYPTO] api: Add... |
556 |
int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e69965 [CRYPTO] api: Do ... |
557 |
struct crypto_instance *inst, u32 mask) |
6bfd48096 [CRYPTO] api: Add... |
558 559 560 561 |
{ int err = -EAGAIN; spawn->inst = inst; |
a73e69965 [CRYPTO] api: Do ... |
562 |
spawn->mask = mask; |
6bfd48096 [CRYPTO] api: Add... |
563 564 565 566 567 568 569 570 571 572 573 574 |
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); |
97eedce1a crypto: api - Add... |
575 576 577 578 579 |
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, struct crypto_instance *inst, const struct crypto_type *frontend) { int err = -EINVAL; |
c614e109c crypto: algapi - ... |
580 |
if ((alg->cra_flags ^ frontend->type) & frontend->maskset) |
97eedce1a crypto: api - Add... |
581 582 583 584 585 586 587 588 589 |
goto out; spawn->frontend = frontend; err = crypto_init_spawn(spawn, alg, inst, frontend->maskset); out: return err; } EXPORT_SYMBOL_GPL(crypto_init_spawn2); |
d6ef2f198 crypto: api - Add... |
590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 |
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); |
6bfd48096 [CRYPTO] api: Add... |
605 606 |
void crypto_drop_spawn(struct crypto_spawn *spawn) { |
7ede5a5ba crypto: api - Fix... |
607 608 |
if (!spawn->alg) return; |
6bfd48096 [CRYPTO] api: Add... |
609 610 611 612 613 |
down_write(&crypto_alg_sem); list_del(&spawn->list); up_write(&crypto_alg_sem); } EXPORT_SYMBOL_GPL(crypto_drop_spawn); |
97eedce1a crypto: api - Add... |
614 |
static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn) |
6bfd48096 [CRYPTO] api: Add... |
615 616 617 |
{ struct crypto_alg *alg; struct crypto_alg *alg2; |
6bfd48096 [CRYPTO] api: Add... |
618 619 620 621 622 623 624 625 626 627 628 629 630 |
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); } |
97eedce1a crypto: api - Add... |
631 632 633 634 635 636 637 638 639 640 641 642 |
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); |
2e306ee01 [CRYPTO] api: Add... |
643 644 645 |
tfm = ERR_PTR(-EINVAL); if (unlikely((alg->cra_flags ^ type) & mask)) goto out_put_alg; |
27d2a3300 [CRYPTO] api: All... |
646 |
tfm = __crypto_alloc_tfm(alg, type, mask); |
6bfd48096 [CRYPTO] api: Add... |
647 |
if (IS_ERR(tfm)) |
2e306ee01 [CRYPTO] api: Add... |
648 649 650 |
goto out_put_alg; return tfm; |
6bfd48096 [CRYPTO] api: Add... |
651 |
|
2e306ee01 [CRYPTO] api: Add... |
652 653 |
out_put_alg: crypto_mod_put(alg); |
6bfd48096 [CRYPTO] api: Add... |
654 655 656 |
return tfm; } EXPORT_SYMBOL_GPL(crypto_spawn_tfm); |
97eedce1a crypto: api - Add... |
657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 |
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 [CRYPTO] api: Add... |
677 678 679 680 681 682 683 684 685 686 687 |
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 [CRYPTO] template... |
688 |
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) |
7fed0bf27 [CRYPTO] api: Add... |
689 |
{ |
39e1ee011 [CRYPTO] api: Add... |
690 |
struct rtattr *rta = tb[0]; |
ebc610e5b [CRYPTO] template... |
691 692 693 694 695 696 |
struct crypto_attr_type *algt; if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*algt)) return ERR_PTR(-EINVAL); |
39e1ee011 [CRYPTO] api: Add... |
697 698 |
if (rta->rta_type != CRYPTOA_TYPE) return ERR_PTR(-EINVAL); |
ebc610e5b [CRYPTO] template... |
699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 |
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); |
68b6c7d69 [CRYPTO] api: Add... |
720 |
const char *crypto_attr_alg_name(struct rtattr *rta) |
ebc610e5b [CRYPTO] template... |
721 |
{ |
7fed0bf27 [CRYPTO] api: Add... |
722 |
struct crypto_attr_alg *alga; |
ebc610e5b [CRYPTO] template... |
723 724 725 |
if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*alga)) |
7fed0bf27 [CRYPTO] api: Add... |
726 |
return ERR_PTR(-EINVAL); |
39e1ee011 [CRYPTO] api: Add... |
727 728 |
if (rta->rta_type != CRYPTOA_ALG) return ERR_PTR(-EINVAL); |
7fed0bf27 [CRYPTO] api: Add... |
729 730 731 |
alga = RTA_DATA(rta); alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; |
68b6c7d69 [CRYPTO] api: Add... |
732 733 734 |
return alga->name; } EXPORT_SYMBOL_GPL(crypto_attr_alg_name); |
d06854f02 crypto: api - Add... |
735 736 737 |
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, const struct crypto_type *frontend, u32 type, u32 mask) |
68b6c7d69 [CRYPTO] api: Add... |
738 739 |
{ const char *name; |
68b6c7d69 [CRYPTO] api: Add... |
740 741 |
name = crypto_attr_alg_name(rta); |
68b6c7d69 [CRYPTO] api: Add... |
742 |
if (IS_ERR(name)) |
3e8afe35c crypto: use ERR_CAST |
743 |
return ERR_CAST(name); |
68b6c7d69 [CRYPTO] api: Add... |
744 |
|
d06854f02 crypto: api - Add... |
745 |
return crypto_find_alg(name, frontend, type, mask); |
7fed0bf27 [CRYPTO] api: Add... |
746 |
} |
d06854f02 crypto: api - Add... |
747 |
EXPORT_SYMBOL_GPL(crypto_attr_alg2); |
3c09f17c3 [CRYPTO] aead: Ad... |
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 |
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); |
7fed0bf27 [CRYPTO] api: Add... |
766 |
|
32f27c745 crypto: api - Add... |
767 768 769 770 771 772 773 774 775 776 777 778 779 780 |
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); |
70ec7bb91 crypto: api - Add... |
781 782 |
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, unsigned int head) |
7fed0bf27 [CRYPTO] api: Add... |
783 784 |
{ struct crypto_instance *inst; |
70ec7bb91 crypto: api - Add... |
785 |
char *p; |
7fed0bf27 [CRYPTO] api: Add... |
786 |
int err; |
70ec7bb91 crypto: api - Add... |
787 788 789 |
p = kzalloc(head + sizeof(*inst) + sizeof(struct crypto_spawn), GFP_KERNEL); if (!p) |
7fed0bf27 [CRYPTO] api: Add... |
790 |
return ERR_PTR(-ENOMEM); |
70ec7bb91 crypto: api - Add... |
791 |
inst = (void *)(p + head); |
32f27c745 crypto: api - Add... |
792 793 |
err = crypto_inst_setname(inst, name, alg); if (err) |
7fed0bf27 [CRYPTO] api: Add... |
794 |
goto err_free_inst; |
70ec7bb91 crypto: api - Add... |
795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 |
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; |
7fed0bf27 [CRYPTO] api: Add... |
813 |
spawn = crypto_instance_ctx(inst); |
a73e69965 [CRYPTO] api: Do ... |
814 815 |
err = crypto_init_spawn(spawn, alg, inst, CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); |
7fed0bf27 [CRYPTO] api: Add... |
816 817 818 819 820 821 822 823 |
if (err) goto err_free_inst; return inst; err_free_inst: kfree(inst); |
70ec7bb91 crypto: api - Add... |
824 825 826 827 |
inst = ERR_PTR(err); out: return inst; |
7fed0bf27 [CRYPTO] api: Add... |
828 829 |
} EXPORT_SYMBOL_GPL(crypto_alloc_instance); |
b5b7f0886 [CRYPTO] api: Add... |
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 |
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); |
31d228cc6 crypto: api - Rem... |
859 |
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue) |
b5b7f0886 [CRYPTO] api: Add... |
860 861 862 863 864 865 866 867 868 869 870 871 872 |
{ 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 crypto: api - Rem... |
873 |
return list_entry(request, struct crypto_async_request, list); |
b5b7f0886 [CRYPTO] api: Add... |
874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 |
} 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); |
7613636de [CRYPTO] api: Add... |
889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 |
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 crypto: algapi - ... |
906 |
if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) || |
27c539aef crypto: algapi - ... |
907 |
IS_ALIGNED((unsigned long)b, __alignof__(*b))) |
db91af0fb crypto: algapi - ... |
908 909 910 |
for (; size >= 4; size -= 4) { c = be32_to_cpu(*--b) + 1; *b = cpu_to_be32(c); |
27c539aef crypto: algapi - ... |
911 |
if (likely(c)) |
db91af0fb crypto: algapi - ... |
912 913 |
return; } |
7613636de [CRYPTO] api: Add... |
914 915 916 917 |
crypto_inc_byte(a, size); } EXPORT_SYMBOL_GPL(crypto_inc); |
a7c391f04 crypto: algapi - ... |
918 |
void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int len) |
7613636de [CRYPTO] api: Add... |
919 |
{ |
db91af0fb crypto: algapi - ... |
920 921 922 923 |
int relalign = 0; if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)) { int size = sizeof(unsigned long); |
a7c391f04 crypto: algapi - ... |
924 925 926 |
int d = (((unsigned long)dst ^ (unsigned long)src1) | ((unsigned long)dst ^ (unsigned long)src2)) & (size - 1); |
db91af0fb crypto: algapi - ... |
927 928 929 930 931 932 933 934 935 936 |
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 crypto: algapi - ... |
937 |
*dst++ = *src1++ ^ *src2++; |
db91af0fb crypto: algapi - ... |
938 939 940 |
len--; } } |
7613636de [CRYPTO] api: Add... |
941 |
|
db91af0fb crypto: algapi - ... |
942 |
while (IS_ENABLED(CONFIG_64BIT) && len >= 8 && !(relalign & 7)) { |
a7c391f04 crypto: algapi - ... |
943 |
*(u64 *)dst = *(u64 *)src1 ^ *(u64 *)src2; |
db91af0fb crypto: algapi - ... |
944 |
dst += 8; |
a7c391f04 crypto: algapi - ... |
945 946 |
src1 += 8; src2 += 8; |
db91af0fb crypto: algapi - ... |
947 948 |
len -= 8; } |
7613636de [CRYPTO] api: Add... |
949 |
|
db91af0fb crypto: algapi - ... |
950 |
while (len >= 4 && !(relalign & 3)) { |
a7c391f04 crypto: algapi - ... |
951 |
*(u32 *)dst = *(u32 *)src1 ^ *(u32 *)src2; |
db91af0fb crypto: algapi - ... |
952 |
dst += 4; |
a7c391f04 crypto: algapi - ... |
953 954 |
src1 += 4; src2 += 4; |
db91af0fb crypto: algapi - ... |
955 956 957 958 |
len -= 4; } while (len >= 2 && !(relalign & 1)) { |
a7c391f04 crypto: algapi - ... |
959 |
*(u16 *)dst = *(u16 *)src1 ^ *(u16 *)src2; |
db91af0fb crypto: algapi - ... |
960 |
dst += 2; |
a7c391f04 crypto: algapi - ... |
961 962 |
src1 += 2; src2 += 2; |
db91af0fb crypto: algapi - ... |
963 964 |
len -= 2; } |
7613636de [CRYPTO] api: Add... |
965 |
|
db91af0fb crypto: algapi - ... |
966 |
while (len--) |
a7c391f04 crypto: algapi - ... |
967 |
*dst++ = *src1++ ^ *src2++; |
7613636de [CRYPTO] api: Add... |
968 |
} |
db91af0fb crypto: algapi - ... |
969 |
EXPORT_SYMBOL_GPL(__crypto_xor); |
7613636de [CRYPTO] api: Add... |
970 |
|
38d214331 crypto: api - Add... |
971 972 |
unsigned int crypto_alg_extsize(struct crypto_alg *alg) { |
c2110f283 crypto: api - Inc... |
973 974 |
return alg->cra_ctxsize + (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1)); |
38d214331 crypto: api - Add... |
975 976 |
} EXPORT_SYMBOL_GPL(crypto_alg_extsize); |
f2aefdab5 crypto: api - Add... |
977 978 979 980 981 982 983 984 985 986 987 988 989 990 |
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); |
cce9e06d1 [CRYPTO] api: Spl... |
991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 |
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"); |