summaryrefslogtreecommitdiffstats
path: root/crypto/algapi.c
diff options
context:
space:
mode:
Diffstat (limited to 'crypto/algapi.c')
-rw-r--r--crypto/algapi.c1071
1 files changed, 1071 insertions, 0 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
new file mode 100644
index 000000000..346557a3f
--- /dev/null
+++ b/crypto/algapi.c
@@ -0,0 +1,1071 @@
+/*
+ * Cryptographic API for algorithms (i.e., low-level API).
+ *
+ * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <crypto/algapi.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/fips.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/rtnetlink.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include "internal.h"
+
+static LIST_HEAD(crypto_template_list);
+
+static inline int crypto_set_driver_name(struct crypto_alg *alg)
+{
+ static const char suffix[] = "-generic";
+ char *driver_name = alg->cra_driver_name;
+ int len;
+
+ if (*driver_name)
+ return 0;
+
+ len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
+ if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME)
+ return -ENAMETOOLONG;
+
+ memcpy(driver_name + len, suffix, sizeof(suffix));
+ return 0;
+}
+
+static inline void crypto_check_module_sig(struct module *mod)
+{
+ if (fips_enabled && mod && !module_sig_ok(mod))
+ panic("Module %s signature verification failed in FIPS mode\n",
+ module_name(mod));
+}
+
+static int crypto_check_alg(struct crypto_alg *alg)
+{
+ crypto_check_module_sig(alg->cra_module);
+
+ if (alg->cra_alignmask & (alg->cra_alignmask + 1))
+ return -EINVAL;
+
+ if (alg->cra_blocksize > PAGE_SIZE / 8)
+ return -EINVAL;
+
+ if (!alg->cra_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;
+ }
+
+ if (alg->cra_priority < 0)
+ return -EINVAL;
+
+ refcount_set(&alg->cra_refcnt, 1);
+
+ return crypto_set_driver_name(alg);
+}
+
+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);
+}
+
+static void crypto_destroy_instance(struct crypto_alg *alg)
+{
+ struct crypto_instance *inst = (void *)alg;
+ struct crypto_template *tmpl = inst->tmpl;
+
+ crypto_free_instance(inst);
+ crypto_tmpl_put(tmpl);
+}
+
+static struct list_head *crypto_more_spawns(struct crypto_alg *alg,
+ struct list_head *stack,
+ struct list_head *top,
+ struct list_head *secondary_spawns)
+{
+ struct crypto_spawn *spawn, *n;
+
+ spawn = list_first_entry_or_null(stack, struct crypto_spawn, list);
+ if (!spawn)
+ return NULL;
+
+ n = list_next_entry(spawn, list);
+
+ if (spawn->alg && &n->list != stack && !n->alg)
+ n->alg = (n->list.next == stack) ? alg :
+ &list_next_entry(n, list)->inst->alg;
+
+ list_move(&spawn->list, secondary_spawns);
+
+ return &n->list == stack ? top : &n->inst->alg.cra_users;
+}
+
+static void crypto_remove_instance(struct crypto_instance *inst,
+ struct list_head *list)
+{
+ struct crypto_template *tmpl = inst->tmpl;
+
+ if (crypto_is_dead(&inst->alg))
+ return;
+
+ inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
+ if (hlist_unhashed(&inst->list))
+ return;
+
+ if (!tmpl || !crypto_tmpl_get(tmpl))
+ return;
+
+ list_move(&inst->alg.cra_list, list);
+ hlist_del(&inst->list);
+ inst->alg.cra_destroy = crypto_destroy_instance;
+
+ BUG_ON(!list_empty(&inst->alg.cra_users));
+}
+
+void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
+ struct crypto_alg *nalg)
+{
+ u32 new_type = (nalg ?: alg)->cra_flags;
+ struct crypto_spawn *spawn, *n;
+ LIST_HEAD(secondary_spawns);
+ struct list_head *spawns;
+ LIST_HEAD(stack);
+ LIST_HEAD(top);
+
+ spawns = &alg->cra_users;
+ list_for_each_entry_safe(spawn, n, spawns, list) {
+ if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
+ continue;
+
+ list_move(&spawn->list, &top);
+ }
+
+ spawns = &top;
+ 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;
+
+ /*
+ * 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;
+ }
+ } while ((spawns = crypto_more_spawns(alg, &stack, &top,
+ &secondary_spawns)));
+
+ list_for_each_entry_safe(spawn, n, &secondary_spawns, list) {
+ if (spawn->alg)
+ list_move(&spawn->list, &spawn->alg->cra_users);
+ else
+ crypto_remove_instance(spawn->inst, list);
+ }
+}
+EXPORT_SYMBOL_GPL(crypto_remove_spawns);
+
+static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
+{
+ struct crypto_alg *q;
+ struct crypto_larval *larval;
+ int ret = -EAGAIN;
+
+ if (crypto_is_dead(alg))
+ goto err;
+
+ INIT_LIST_HEAD(&alg->cra_users);
+
+ /* No cheating! */
+ alg->cra_flags &= ~CRYPTO_ALG_TESTED;
+
+ ret = -EEXIST;
+
+ list_for_each_entry(q, &crypto_alg_list, cra_list) {
+ if (q == alg)
+ goto err;
+
+ if (crypto_is_moribund(q))
+ continue;
+
+ if (crypto_is_larval(q)) {
+ if (!strcmp(alg->cra_driver_name, q->cra_driver_name))
+ goto err;
+ continue;
+ }
+
+ if (!strcmp(q->cra_driver_name, alg->cra_name) ||
+ !strcmp(q->cra_name, alg->cra_driver_name))
+ goto err;
+ }
+
+ larval = crypto_larval_alloc(alg->cra_name,
+ alg->cra_flags | CRYPTO_ALG_TESTED, 0);
+ if (IS_ERR(larval))
+ goto out;
+
+ ret = -ENOENT;
+ larval->adult = crypto_mod_get(alg);
+ if (!larval->adult)
+ goto free_larval;
+
+ refcount_set(&larval->alg.cra_refcnt, 1);
+ memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
+ CRYPTO_MAX_ALG_NAME);
+ larval->alg.cra_priority = alg->cra_priority;
+
+ list_add(&alg->cra_list, &crypto_alg_list);
+ list_add(&larval->alg.cra_list, &crypto_alg_list);
+
+out:
+ return larval;
+
+free_larval:
+ kfree(larval);
+err:
+ larval = ERR_PTR(ret);
+ goto out;
+}
+
+void crypto_alg_tested(const char *name, int err)
+{
+ struct crypto_larval *test;
+ struct crypto_alg *alg;
+ struct crypto_alg *q;
+ LIST_HEAD(list);
+
+ down_write(&crypto_alg_sem);
+ list_for_each_entry(q, &crypto_alg_list, cra_list) {
+ if (crypto_is_moribund(q) || !crypto_is_larval(q))
+ continue;
+
+ test = (struct crypto_larval *)q;
+
+ if (!strcmp(q->cra_driver_name, name))
+ goto found;
+ }
+
+ pr_err("alg: Unexpected test result for %s: %d\n", name, err);
+ goto unlock;
+
+found:
+ q->cra_flags |= CRYPTO_ALG_DEAD;
+ alg = test->adult;
+ if (err || list_empty(&alg->cra_list))
+ goto complete;
+
+ alg->cra_flags |= CRYPTO_ALG_TESTED;
+
+ list_for_each_entry(q, &crypto_alg_list, cra_list) {
+ if (q == alg)
+ continue;
+
+ if (crypto_is_moribund(q))
+ continue;
+
+ if (crypto_is_larval(q)) {
+ struct crypto_larval *larval = (void *)q;
+
+ /*
+ * Check to see if either our generic name or
+ * specific name can satisfy the name requested
+ * by the larval entry q.
+ */
+ if (strcmp(alg->cra_name, q->cra_name) &&
+ strcmp(alg->cra_driver_name, q->cra_name))
+ continue;
+
+ if (larval->adult)
+ continue;
+ if ((q->cra_flags ^ alg->cra_flags) & larval->mask)
+ continue;
+ if (!crypto_mod_get(alg))
+ continue;
+
+ larval->adult = alg;
+ continue;
+ }
+
+ if (strcmp(alg->cra_name, q->cra_name))
+ continue;
+
+ if (strcmp(alg->cra_driver_name, q->cra_driver_name) &&
+ q->cra_priority > alg->cra_priority)
+ continue;
+
+ crypto_remove_spawns(q, &list, alg);
+ }
+
+complete:
+ complete_all(&test->completion);
+
+unlock:
+ up_write(&crypto_alg_sem);
+
+ crypto_remove_final(&list);
+}
+EXPORT_SYMBOL_GPL(crypto_alg_tested);
+
+void crypto_remove_final(struct list_head *list)
+{
+ struct crypto_alg *alg;
+ struct crypto_alg *n;
+
+ list_for_each_entry_safe(alg, n, list, cra_list) {
+ list_del_init(&alg->cra_list);
+ crypto_alg_put(alg);
+ }
+}
+EXPORT_SYMBOL_GPL(crypto_remove_final);
+
+static void crypto_wait_for_test(struct crypto_larval *larval)
+{
+ int err;
+
+ err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult);
+ if (err != NOTIFY_STOP) {
+ if (WARN_ON(err != NOTIFY_DONE))
+ goto out;
+ crypto_alg_tested(larval->alg.cra_driver_name, 0);
+ }
+
+ err = wait_for_completion_killable(&larval->completion);
+ WARN_ON(err);
+
+out:
+ crypto_larval_kill(&larval->alg);
+}
+
+int crypto_register_alg(struct crypto_alg *alg)
+{
+ struct crypto_larval *larval;
+ int err;
+
+ alg->cra_flags &= ~CRYPTO_ALG_DEAD;
+ err = crypto_check_alg(alg);
+ if (err)
+ return err;
+
+ down_write(&crypto_alg_sem);
+ larval = __crypto_register_alg(alg);
+ up_write(&crypto_alg_sem);
+
+ if (IS_ERR(larval))
+ return PTR_ERR(larval);
+
+ crypto_wait_for_test(larval);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_register_alg);
+
+static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list)
+{
+ if (unlikely(list_empty(&alg->cra_list)))
+ return -ENOENT;
+
+ alg->cra_flags |= CRYPTO_ALG_DEAD;
+
+ list_del_init(&alg->cra_list);
+ crypto_remove_spawns(alg, list, NULL);
+
+ return 0;
+}
+
+int crypto_unregister_alg(struct crypto_alg *alg)
+{
+ int ret;
+ LIST_HEAD(list);
+
+ down_write(&crypto_alg_sem);
+ ret = crypto_remove_alg(alg, &list);
+ up_write(&crypto_alg_sem);
+
+ if (ret)
+ return ret;
+
+ BUG_ON(refcount_read(&alg->cra_refcnt) != 1);
+ if (alg->cra_destroy)
+ alg->cra_destroy(alg);
+
+ crypto_remove_final(&list);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_alg);
+
+int crypto_register_algs(struct crypto_alg *algs, int count)
+{
+ int i, ret;
+
+ for (i = 0; i < count; i++) {
+ ret = crypto_register_alg(&algs[i]);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+
+err:
+ for (--i; i >= 0; --i)
+ crypto_unregister_alg(&algs[i]);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(crypto_register_algs);
+
+int crypto_unregister_algs(struct crypto_alg *algs, int count)
+{
+ int i, ret;
+
+ for (i = 0; i < count; i++) {
+ ret = crypto_unregister_alg(&algs[i]);
+ if (ret)
+ pr_err("Failed to unregister %s %s: %d\n",
+ algs[i].cra_driver_name, algs[i].cra_name, ret);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_algs);
+
+int crypto_register_template(struct crypto_template *tmpl)
+{
+ struct crypto_template *q;
+ int err = -EEXIST;
+
+ down_write(&crypto_alg_sem);
+
+ crypto_check_module_sig(tmpl->module);
+
+ list_for_each_entry(q, &crypto_template_list, list) {
+ if (q == tmpl)
+ goto out;
+ }
+
+ list_add(&tmpl->list, &crypto_template_list);
+ err = 0;
+out:
+ up_write(&crypto_alg_sem);
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_register_template);
+
+void crypto_unregister_template(struct crypto_template *tmpl)
+{
+ struct crypto_instance *inst;
+ struct hlist_node *n;
+ struct hlist_head *list;
+ LIST_HEAD(users);
+
+ down_write(&crypto_alg_sem);
+
+ BUG_ON(list_empty(&tmpl->list));
+ list_del_init(&tmpl->list);
+
+ list = &tmpl->instances;
+ hlist_for_each_entry(inst, list, list) {
+ int err = crypto_remove_alg(&inst->alg, &users);
+
+ BUG_ON(err);
+ }
+
+ up_write(&crypto_alg_sem);
+
+ hlist_for_each_entry_safe(inst, n, list, list) {
+ BUG_ON(refcount_read(&inst->alg.cra_refcnt) != 1);
+ crypto_free_instance(inst);
+ }
+ crypto_remove_final(&users);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_template);
+
+static struct crypto_template *__crypto_lookup_template(const char *name)
+{
+ struct crypto_template *q, *tmpl = NULL;
+
+ down_read(&crypto_alg_sem);
+ list_for_each_entry(q, &crypto_template_list, list) {
+ if (strcmp(q->name, name))
+ continue;
+ if (unlikely(!crypto_tmpl_get(q)))
+ continue;
+
+ tmpl = q;
+ break;
+ }
+ up_read(&crypto_alg_sem);
+
+ return tmpl;
+}
+
+struct crypto_template *crypto_lookup_template(const char *name)
+{
+ return try_then_request_module(__crypto_lookup_template(name),
+ "crypto-%s", name);
+}
+EXPORT_SYMBOL_GPL(crypto_lookup_template);
+
+int crypto_register_instance(struct crypto_template *tmpl,
+ struct crypto_instance *inst)
+{
+ struct crypto_larval *larval;
+ int err;
+
+ err = crypto_check_alg(&inst->alg);
+ if (err)
+ return err;
+
+ inst->alg.cra_module = tmpl->module;
+ inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE;
+
+ down_write(&crypto_alg_sem);
+
+ larval = __crypto_register_alg(&inst->alg);
+ if (IS_ERR(larval))
+ goto unlock;
+
+ hlist_add_head(&inst->list, &tmpl->instances);
+ inst->tmpl = tmpl;
+
+unlock:
+ up_write(&crypto_alg_sem);
+
+ err = PTR_ERR(larval);
+ if (IS_ERR(larval))
+ goto err;
+
+ crypto_wait_for_test(larval);
+ err = 0;
+
+err:
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_register_instance);
+
+int crypto_unregister_instance(struct crypto_instance *inst)
+{
+ LIST_HEAD(list);
+
+ down_write(&crypto_alg_sem);
+
+ crypto_remove_spawns(&inst->alg, &list, NULL);
+ crypto_remove_instance(inst, &list);
+
+ up_write(&crypto_alg_sem);
+
+ crypto_remove_final(&list);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_instance);
+
+int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
+ struct crypto_instance *inst, u32 mask)
+{
+ int err = -EAGAIN;
+
+ spawn->inst = inst;
+ spawn->mask = mask;
+
+ down_write(&crypto_alg_sem);
+ if (!crypto_is_moribund(alg)) {
+ list_add(&spawn->list, &alg->cra_users);
+ spawn->alg = alg;
+ err = 0;
+ }
+ up_write(&crypto_alg_sem);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_init_spawn);
+
+int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
+ struct crypto_instance *inst,
+ const struct crypto_type *frontend)
+{
+ int err = -EINVAL;
+
+ if ((alg->cra_flags ^ frontend->type) & frontend->maskset)
+ goto out;
+
+ spawn->frontend = frontend;
+ err = crypto_init_spawn(spawn, alg, inst, frontend->maskset);
+
+out:
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_init_spawn2);
+
+int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
+ u32 type, u32 mask)
+{
+ struct crypto_alg *alg;
+ int err;
+
+ alg = crypto_find_alg(name, spawn->frontend, type, mask);
+ if (IS_ERR(alg))
+ return PTR_ERR(alg);
+
+ err = crypto_init_spawn(spawn, alg, spawn->inst, mask);
+ crypto_mod_put(alg);
+ return err;
+}
+EXPORT_SYMBOL_GPL(crypto_grab_spawn);
+
+void crypto_drop_spawn(struct crypto_spawn *spawn)
+{
+ down_write(&crypto_alg_sem);
+ if (spawn->alg)
+ list_del(&spawn->list);
+ up_write(&crypto_alg_sem);
+}
+EXPORT_SYMBOL_GPL(crypto_drop_spawn);
+
+static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
+{
+ struct crypto_alg *alg;
+
+ down_read(&crypto_alg_sem);
+ alg = spawn->alg;
+ if (alg && !crypto_mod_get(alg)) {
+ alg->cra_flags |= CRYPTO_ALG_DYING;
+ alg = NULL;
+ }
+ up_read(&crypto_alg_sem);
+
+ return alg ?: ERR_PTR(-EAGAIN);
+}
+
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
+ u32 mask)
+{
+ struct crypto_alg *alg;
+ struct crypto_tfm *tfm;
+
+ alg = crypto_spawn_alg(spawn);
+ if (IS_ERR(alg))
+ return ERR_CAST(alg);
+
+ tfm = ERR_PTR(-EINVAL);
+ if (unlikely((alg->cra_flags ^ type) & mask))
+ goto out_put_alg;
+
+ tfm = __crypto_alloc_tfm(alg, type, mask);
+ if (IS_ERR(tfm))
+ goto out_put_alg;
+
+ return tfm;
+
+out_put_alg:
+ crypto_mod_put(alg);
+ return tfm;
+}
+EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
+
+void *crypto_spawn_tfm2(struct crypto_spawn *spawn)
+{
+ struct crypto_alg *alg;
+ struct crypto_tfm *tfm;
+
+ alg = crypto_spawn_alg(spawn);
+ if (IS_ERR(alg))
+ return ERR_CAST(alg);
+
+ tfm = crypto_create_tfm(alg, spawn->frontend);
+ if (IS_ERR(tfm))
+ goto out_put_alg;
+
+ return tfm;
+
+out_put_alg:
+ crypto_mod_put(alg);
+ return tfm;
+}
+EXPORT_SYMBOL_GPL(crypto_spawn_tfm2);
+
+int crypto_register_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&crypto_chain, nb);
+}
+EXPORT_SYMBOL_GPL(crypto_register_notifier);
+
+int crypto_unregister_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&crypto_chain, nb);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_notifier);
+
+struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb)
+{
+ struct rtattr *rta = tb[0];
+ struct crypto_attr_type *algt;
+
+ if (!rta)
+ return ERR_PTR(-ENOENT);
+ if (RTA_PAYLOAD(rta) < sizeof(*algt))
+ return ERR_PTR(-EINVAL);
+ if (rta->rta_type != CRYPTOA_TYPE)
+ return ERR_PTR(-EINVAL);
+
+ algt = RTA_DATA(rta);
+
+ return algt;
+}
+EXPORT_SYMBOL_GPL(crypto_get_attr_type);
+
+int crypto_check_attr_type(struct rtattr **tb, u32 type)
+{
+ struct crypto_attr_type *algt;
+
+ algt = crypto_get_attr_type(tb);
+ if (IS_ERR(algt))
+ return PTR_ERR(algt);
+
+ if ((algt->type ^ type) & algt->mask)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_check_attr_type);
+
+const char *crypto_attr_alg_name(struct rtattr *rta)
+{
+ struct crypto_attr_alg *alga;
+
+ if (!rta)
+ return ERR_PTR(-ENOENT);
+ if (RTA_PAYLOAD(rta) < sizeof(*alga))
+ return ERR_PTR(-EINVAL);
+ if (rta->rta_type != CRYPTOA_ALG)
+ return ERR_PTR(-EINVAL);
+
+ alga = RTA_DATA(rta);
+ alga->name[CRYPTO_MAX_ALG_NAME - 1] = 0;
+
+ return alga->name;
+}
+EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
+
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+ const struct crypto_type *frontend,
+ u32 type, u32 mask)
+{
+ const char *name;
+
+ name = crypto_attr_alg_name(rta);
+ if (IS_ERR(name))
+ return ERR_CAST(name);
+
+ return crypto_find_alg(name, frontend, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_attr_alg2);
+
+int crypto_attr_u32(struct rtattr *rta, u32 *num)
+{
+ struct crypto_attr_u32 *nu32;
+
+ if (!rta)
+ return -ENOENT;
+ if (RTA_PAYLOAD(rta) < sizeof(*nu32))
+ return -EINVAL;
+ if (rta->rta_type != CRYPTOA_U32)
+ return -EINVAL;
+
+ nu32 = RTA_DATA(rta);
+ *num = nu32->num;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_attr_u32);
+
+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);
+
+void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
+ unsigned int head)
+{
+ struct crypto_instance *inst;
+ char *p;
+ int err;
+
+ p = kzalloc(head + sizeof(*inst) + sizeof(struct crypto_spawn),
+ GFP_KERNEL);
+ if (!p)
+ return ERR_PTR(-ENOMEM);
+
+ inst = (void *)(p + head);
+
+ err = crypto_inst_setname(inst, name, alg);
+ if (err)
+ goto err_free_inst;
+
+ return p;
+
+err_free_inst:
+ kfree(p);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_instance2);
+
+struct crypto_instance *crypto_alloc_instance(const char *name,
+ struct crypto_alg *alg)
+{
+ struct crypto_instance *inst;
+ struct crypto_spawn *spawn;
+ int err;
+
+ inst = crypto_alloc_instance2(name, alg, 0);
+ if (IS_ERR(inst))
+ goto out;
+
+ spawn = crypto_instance_ctx(inst);
+ err = crypto_init_spawn(spawn, alg, inst,
+ CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
+
+ if (err)
+ goto err_free_inst;
+
+ return inst;
+
+err_free_inst:
+ kfree(inst);
+ inst = ERR_PTR(err);
+
+out:
+ return inst;
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_instance);
+
+void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen)
+{
+ INIT_LIST_HEAD(&queue->list);
+ queue->backlog = &queue->list;
+ queue->qlen = 0;
+ queue->max_qlen = max_qlen;
+}
+EXPORT_SYMBOL_GPL(crypto_init_queue);
+
+int crypto_enqueue_request(struct crypto_queue *queue,
+ struct crypto_async_request *request)
+{
+ int err = -EINPROGRESS;
+
+ if (unlikely(queue->qlen >= queue->max_qlen)) {
+ if (!(request->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
+ err = -ENOSPC;
+ goto out;
+ }
+ err = -EBUSY;
+ 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);
+
+struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue)
+{
+ struct list_head *request;
+
+ if (unlikely(!queue->qlen))
+ return NULL;
+
+ queue->qlen--;
+
+ if (queue->backlog != &queue->list)
+ queue->backlog = queue->backlog->next;
+
+ request = queue->list.next;
+ list_del(request);
+
+ return list_entry(request, struct crypto_async_request, list);
+}
+EXPORT_SYMBOL_GPL(crypto_dequeue_request);
+
+int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm)
+{
+ struct crypto_async_request *req;
+
+ list_for_each_entry(req, &queue->list, list) {
+ if (req->tfm == tfm)
+ return 1;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_tfm_in_queue);
+
+static inline void crypto_inc_byte(u8 *a, unsigned int size)
+{
+ u8 *b = (a + size);
+ u8 c;
+
+ for (; size; size--) {
+ c = *--b + 1;
+ *b = c;
+ if (c)
+ break;
+ }
+}
+
+void crypto_inc(u8 *a, unsigned int size)
+{
+ __be32 *b = (__be32 *)(a + size);
+ u32 c;
+
+ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) ||
+ IS_ALIGNED((unsigned long)b, __alignof__(*b)))
+ for (; size >= 4; size -= 4) {
+ c = be32_to_cpu(*--b) + 1;
+ *b = cpu_to_be32(c);
+ if (likely(c))
+ return;
+ }
+
+ crypto_inc_byte(a, size);
+}
+EXPORT_SYMBOL_GPL(crypto_inc);
+
+void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int len)
+{
+ int relalign = 0;
+
+ if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)) {
+ int size = sizeof(unsigned long);
+ int d = (((unsigned long)dst ^ (unsigned long)src1) |
+ ((unsigned long)dst ^ (unsigned long)src2)) &
+ (size - 1);
+
+ 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) {
+ *dst++ = *src1++ ^ *src2++;
+ len--;
+ }
+ }
+
+ while (IS_ENABLED(CONFIG_64BIT) && len >= 8 && !(relalign & 7)) {
+ *(u64 *)dst = *(u64 *)src1 ^ *(u64 *)src2;
+ dst += 8;
+ src1 += 8;
+ src2 += 8;
+ len -= 8;
+ }
+
+ while (len >= 4 && !(relalign & 3)) {
+ *(u32 *)dst = *(u32 *)src1 ^ *(u32 *)src2;
+ dst += 4;
+ src1 += 4;
+ src2 += 4;
+ len -= 4;
+ }
+
+ while (len >= 2 && !(relalign & 1)) {
+ *(u16 *)dst = *(u16 *)src1 ^ *(u16 *)src2;
+ dst += 2;
+ src1 += 2;
+ src2 += 2;
+ len -= 2;
+ }
+
+ while (len--)
+ *dst++ = *src1++ ^ *src2++;
+}
+EXPORT_SYMBOL_GPL(__crypto_xor);
+
+unsigned int crypto_alg_extsize(struct crypto_alg *alg)
+{
+ return alg->cra_ctxsize +
+ (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1));
+}
+EXPORT_SYMBOL_GPL(crypto_alg_extsize);
+
+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);
+
+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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 19:15:41 +0000