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crypto/algapi.c
20.1 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> #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) { #ifdef CONFIG_CRYPTO_FIPS if (fips_enabled && mod && !mod->sig_ok) panic("Module %s signature verification failed in FIPS mode ", mod->name); #endif return; } |
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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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return crypto_set_driver_name(alg); } |
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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; tmpl->free(inst); 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; 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; } |
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static void crypto_remove_spawn(struct crypto_spawn *spawn, |
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struct list_head *list) |
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{ |
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struct crypto_instance *inst = spawn->inst; 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 (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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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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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_spawn(spawn, 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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atomic_set(&alg->cra_refcnt, 1); |
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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; } printk(KERN_ERR "alg: Unexpected test result for %s: %d ", name, err); 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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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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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); } err = wait_for_completion_interruptible(&larval->completion); 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; 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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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); 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); tmpl->free(inst); } |
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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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err = crypto_check_alg(&inst->alg); if (err) goto err; inst->alg.cra_module = tmpl->module; |
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inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE; |
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down_write(&crypto_alg_sem); |
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larval = __crypto_register_alg(&inst->alg); if (IS_ERR(larval)) |
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goto unlock; hlist_add_head(&inst->list, &tmpl->instances); inst->tmpl = tmpl; unlock: up_write(&crypto_alg_sem); |
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err = PTR_ERR(larval); if (IS_ERR(larval)) goto err; crypto_wait_for_test(larval); err = 0; |
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err: return err; } EXPORT_SYMBOL_GPL(crypto_register_instance); |
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int crypto_unregister_instance(struct crypto_alg *alg) { int err; struct crypto_instance *inst = (void *)alg; struct crypto_template *tmpl = inst->tmpl; LIST_HEAD(users); if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE)) return -EINVAL; BUG_ON(atomic_read(&alg->cra_refcnt) != 1); down_write(&crypto_alg_sem); hlist_del_init(&inst->list); err = crypto_remove_alg(alg, &users); up_write(&crypto_alg_sem); if (err) return err; tmpl->free(inst); crypto_remove_final(&users); return 0; } EXPORT_SYMBOL_GPL(crypto_unregister_instance); |
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int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
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struct crypto_instance *inst, u32 mask) |
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{ int err = -EAGAIN; spawn->inst = inst; |
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spawn->mask = mask; |
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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); |
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int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, struct crypto_instance *inst, const struct crypto_type *frontend) { int err = -EINVAL; |
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if ((alg->cra_flags ^ frontend->type) & frontend->maskset) |
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goto out; spawn->frontend = frontend; err = crypto_init_spawn(spawn, alg, inst, frontend->maskset); out: return err; } EXPORT_SYMBOL_GPL(crypto_init_spawn2); |
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void crypto_drop_spawn(struct crypto_spawn *spawn) { |
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if (!spawn->alg) return; |
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down_write(&crypto_alg_sem); list_del(&spawn->list); up_write(&crypto_alg_sem); } EXPORT_SYMBOL_GPL(crypto_drop_spawn); |
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static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn) |
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{ struct crypto_alg *alg; struct crypto_alg *alg2; |
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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); } |
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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); |
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tfm = ERR_PTR(-EINVAL); if (unlikely((alg->cra_flags ^ type) & mask)) goto out_put_alg; |
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tfm = __crypto_alloc_tfm(alg, type, mask); |
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if (IS_ERR(tfm)) |
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goto out_put_alg; return tfm; |
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out_put_alg: crypto_mod_put(alg); |
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return tfm; } EXPORT_SYMBOL_GPL(crypto_spawn_tfm); |
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637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 |
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
|
657 658 659 660 661 662 663 664 665 666 667 |
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
|
668 |
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb) |
7fed0bf27
|
669 |
{ |
39e1ee011
|
670 |
struct rtattr *rta = tb[0]; |
ebc610e5b
|
671 672 673 674 675 676 |
struct crypto_attr_type *algt; if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*algt)) return ERR_PTR(-EINVAL); |
39e1ee011
|
677 678 |
if (rta->rta_type != CRYPTOA_TYPE) return ERR_PTR(-EINVAL); |
ebc610e5b
|
679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 |
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
|
700 |
const char *crypto_attr_alg_name(struct rtattr *rta) |
ebc610e5b
|
701 |
{ |
7fed0bf27
|
702 |
struct crypto_attr_alg *alga; |
ebc610e5b
|
703 704 705 |
if (!rta) return ERR_PTR(-ENOENT); if (RTA_PAYLOAD(rta) < sizeof(*alga)) |
7fed0bf27
|
706 |
return ERR_PTR(-EINVAL); |
39e1ee011
|
707 708 |
if (rta->rta_type != CRYPTOA_ALG) return ERR_PTR(-EINVAL); |
7fed0bf27
|
709 710 711 |
alga = RTA_DATA(rta); alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0; |
68b6c7d69
|
712 713 714 |
return alga->name; } EXPORT_SYMBOL_GPL(crypto_attr_alg_name); |
d06854f02
|
715 716 717 |
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, const struct crypto_type *frontend, u32 type, u32 mask) |
68b6c7d69
|
718 719 |
{ const char *name; |
68b6c7d69
|
720 721 |
name = crypto_attr_alg_name(rta); |
68b6c7d69
|
722 |
if (IS_ERR(name)) |
3e8afe35c
|
723 |
return ERR_CAST(name); |
68b6c7d69
|
724 |
|
d06854f02
|
725 |
return crypto_find_alg(name, frontend, type, mask); |
7fed0bf27
|
726 |
} |
d06854f02
|
727 |
EXPORT_SYMBOL_GPL(crypto_attr_alg2); |
3c09f17c3
|
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 |
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
|
746 |
|
70ec7bb91
|
747 748 |
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, unsigned int head) |
7fed0bf27
|
749 750 |
{ struct crypto_instance *inst; |
70ec7bb91
|
751 |
char *p; |
7fed0bf27
|
752 |
int err; |
70ec7bb91
|
753 754 755 |
p = kzalloc(head + sizeof(*inst) + sizeof(struct crypto_spawn), GFP_KERNEL); if (!p) |
7fed0bf27
|
756 |
return ERR_PTR(-ENOMEM); |
70ec7bb91
|
757 |
inst = (void *)(p + head); |
7fed0bf27
|
758 759 760 761 762 763 764 765 |
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; |
70ec7bb91
|
766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 |
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
|
784 |
spawn = crypto_instance_ctx(inst); |
a73e69965
|
785 786 |
err = crypto_init_spawn(spawn, alg, inst, CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); |
7fed0bf27
|
787 788 789 790 791 792 793 794 |
if (err) goto err_free_inst; return inst; err_free_inst: kfree(inst); |
70ec7bb91
|
795 796 797 798 |
inst = ERR_PTR(err); out: return inst; |
7fed0bf27
|
799 800 |
} EXPORT_SYMBOL_GPL(crypto_alloc_instance); |
b5b7f0886
|
801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 |
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); |
0c7d400fa
|
830 |
void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset) |
b5b7f0886
|
831 832 833 834 835 836 837 838 839 840 841 842 843 |
{ 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); |
0c7d400fa
|
844 845 846 847 848 849 850 851 |
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); |
b5b7f0886
|
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 |
} 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
|
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 |
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); |
cce9e06d1
|
913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 |
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"); |