Release 4.11 crypto/algapi.c
/*
* Cryptographic API for algorithms (i.e., low-level API).
*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/fips.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/string.h>
#include "internal.h"
static LIST_HEAD(crypto_template_list);
static inline int crypto_set_driver_name(struct crypto_alg *alg)
{
static const char suffix[] = "-generic";
char *driver_name = alg->cra_driver_name;
int len;
if (*driver_name)
return 0;
len = strlcpy(driver_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
if (len + sizeof(suffix) > CRYPTO_MAX_ALG_NAME)
return -ENAMETOOLONG;
memcpy(driver_name + len, suffix, sizeof(suffix));
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 84 | 100.00% | 1 | 100.00% |
Total | 84 | 100.00% | 1 | 100.00% |
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));
}
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Jarod Wilson | 28 | 82.35% | 1 | 33.33% |
Herbert Xu | 6 | 17.65% | 2 | 66.67% |
Total | 34 | 100.00% | 3 | 100.00% |
static int crypto_check_alg(struct crypto_alg *alg)
{
crypto_check_module_sig(alg->cra_module);
if (alg->cra_alignmask & (alg->cra_alignmask + 1))
return -EINVAL;
if (alg->cra_blocksize > PAGE_SIZE / 8)
return -EINVAL;
if (alg->cra_priority < 0)
return -EINVAL;
atomic_set(&alg->cra_refcnt, 1);
return crypto_set_driver_name(alg);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 71 | 91.03% | 3 | 75.00% |
Jarod Wilson | 7 | 8.97% | 1 | 25.00% |
Total | 78 | 100.00% | 4 | 100.00% |
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 45 | 100.00% | 1 | 100.00% |
Total | 45 | 100.00% | 1 | 100.00% |
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 41 | 100.00% | 5 | 100.00% |
Total | 41 | 100.00% | 5 | 100.00% |
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;
}
Contributors
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Herbert Xu | 129 | 92.14% | 1 | 50.00% |
Geliang Tang | 11 | 7.86% | 1 | 50.00% |
Total | 140 | 100.00% | 2 | 100.00% |
static void crypto_remove_instance(struct crypto_instance *inst,
struct list_head *list)
{
struct crypto_template *tmpl = inst->tmpl;
if (crypto_is_dead(&inst->alg))
return;
inst->alg.cra_flags |= CRYPTO_ALG_DEAD;
if (hlist_unhashed(&inst->list))
return;
if (!tmpl || !crypto_tmpl_get(tmpl))
return;
crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, &inst->alg);
list_move(&inst->alg.cra_list, list);
hlist_del(&inst->list);
inst->alg.cra_destroy = crypto_destroy_instance;
BUG_ON(!list_empty(&inst->alg.cra_users));
}
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Herbert Xu | 119 | 100.00% | 9 | 100.00% |
Total | 119 | 100.00% | 9 | 100.00% |
void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
struct crypto_alg *nalg)
{
u32 new_type = (nalg ?: alg)->cra_flags;
struct crypto_spawn *spawn, *n;
LIST_HEAD(secondary_spawns);
struct list_head *spawns;
LIST_HEAD(stack);
LIST_HEAD(top);
spawns = &alg->cra_users;
list_for_each_entry_safe(spawn, n, spawns, list) {
if ((spawn->alg->cra_flags ^ new_type) & spawn->mask)
continue;
list_move(&spawn->list, &top);
}
spawns = ⊤
do {
while (!list_empty(spawns)) {
struct crypto_instance *inst;
spawn = list_first_entry(spawns, struct crypto_spawn,
list);
inst = spawn->inst;
BUG_ON(&inst->alg == alg);
list_move(&spawn->list, &stack);
if (&inst->alg == nalg)
break;
spawn->alg = NULL;
spawns = &inst->alg.cra_users;
}
} while ((spawns = crypto_more_spawns(alg, &stack, &top,
&secondary_spawns)));
list_for_each_entry_safe(spawn, n, &secondary_spawns, list) {
if (spawn->alg)
list_move(&spawn->list, &spawn->alg->cra_users);
else
crypto_remove_instance(spawn->inst, list);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 258 | 100.00% | 6 | 100.00% |
Total | 258 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_remove_spawns);
static struct crypto_larval *__crypto_register_alg(struct crypto_alg *alg)
{
struct crypto_alg *q;
struct crypto_larval *larval;
int ret = -EAGAIN;
if (crypto_is_dead(alg))
goto err;
INIT_LIST_HEAD(&alg->cra_users);
/* No cheating! */
alg->cra_flags &= ~CRYPTO_ALG_TESTED;
ret = -EEXIST;
list_for_each_entry(q, &crypto_alg_list, cra_list) {
if (q == alg)
goto err;
if (crypto_is_moribund(q))
continue;
if (crypto_is_larval(q)) {
if (!strcmp(alg->cra_driver_name, q->cra_driver_name))
goto err;
continue;
}
if (!strcmp(q->cra_driver_name, alg->cra_name) ||
!strcmp(q->cra_name, alg->cra_driver_name))
goto err;
}
larval = crypto_larval_alloc(alg->cra_name,
alg->cra_flags | CRYPTO_ALG_TESTED, 0);
if (IS_ERR(larval))
goto out;
ret = -ENOENT;
larval->adult = crypto_mod_get(alg);
if (!larval->adult)
goto free_larval;
atomic_set(&larval->alg.cra_refcnt, 1);
memcpy(larval->alg.cra_driver_name, alg->cra_driver_name,
CRYPTO_MAX_ALG_NAME);
larval->alg.cra_priority = alg->cra_priority;
list_add(&alg->cra_list, &crypto_alg_list);
list_add(&larval->alg.cra_list, &crypto_alg_list);
out:
return larval;
free_larval:
kfree(larval);
err:
larval = ERR_PTR(ret);
goto out;
}
Contributors
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Herbert Xu | 279 | 100.00% | 4 | 100.00% |
Total | 279 | 100.00% | 4 | 100.00% |
void crypto_alg_tested(const char *name, int err)
{
struct crypto_larval *test;
struct crypto_alg *alg;
struct crypto_alg *q;
LIST_HEAD(list);
down_write(&crypto_alg_sem);
list_for_each_entry(q, &crypto_alg_list, cra_list) {
if (crypto_is_moribund(q) || !crypto_is_larval(q))
continue;
test = (struct crypto_larval *)q;
if (!strcmp(q->cra_driver_name, name))
goto found;
}
printk(KERN_ERR "alg: Unexpected test result for %s: %d\n", name, err);
goto unlock;
found:
q->cra_flags |= CRYPTO_ALG_DEAD;
alg = test->adult;
if (err || list_empty(&alg->cra_list))
goto complete;
alg->cra_flags |= CRYPTO_ALG_TESTED;
list_for_each_entry(q, &crypto_alg_list, cra_list) {
if (q == alg)
continue;
if (crypto_is_moribund(q))
continue;
if (crypto_is_larval(q)) {
struct crypto_larval *larval = (void *)q;
/*
* Check to see if either our generic name or
* specific name can satisfy the name requested
* by the larval entry q.
*/
if (strcmp(alg->cra_name, q->cra_name) &&
strcmp(alg->cra_driver_name, q->cra_name))
continue;
if (larval->adult)
continue;
if ((q->cra_flags ^ alg->cra_flags) & larval->mask)
continue;
if (!crypto_mod_get(alg))
continue;
larval->adult = alg;
continue;
}
if (strcmp(alg->cra_name, q->cra_name))
continue;
if (strcmp(alg->cra_driver_name, q->cra_driver_name) &&
q->cra_priority > alg->cra_priority)
continue;
crypto_remove_spawns(q, &list, alg);
}
complete:
complete_all(&test->completion);
unlock:
up_write(&crypto_alg_sem);
crypto_remove_final(&list);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 316 | 100.00% | 7 | 100.00% |
Total | 316 | 100.00% | 7 | 100.00% |
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);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 45 | 100.00% | 1 | 100.00% |
Total | 45 | 100.00% | 1 | 100.00% |
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);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 81 | 100.00% | 2 | 100.00% |
Total | 81 | 100.00% | 2 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 72 | 91.14% | 2 | 66.67% |
Salvatore Benedetto | 7 | 8.86% | 1 | 33.33% |
Total | 79 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_register_alg);
static int crypto_remove_alg(struct crypto_alg *alg, struct list_head *list)
{
if (unlikely(list_empty(&alg->cra_list)))
return -ENOENT;
alg->cra_flags |= CRYPTO_ALG_DEAD;
crypto_notify(CRYPTO_MSG_ALG_UNREGISTER, alg);
list_del_init(&alg->cra_list);
crypto_remove_spawns(alg, list, NULL);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 66 | 100.00% | 4 | 100.00% |
Total | 66 | 100.00% | 4 | 100.00% |
int crypto_unregister_alg(struct crypto_alg *alg)
{
int ret;
LIST_HEAD(list);
down_write(&crypto_alg_sem);
ret = crypto_remove_alg(alg, &list);
up_write(&crypto_alg_sem);
if (ret)
return ret;
BUG_ON(atomic_read(&alg->cra_refcnt) != 1);
if (alg->cra_destroy)
alg->cra_destroy(alg);
crypto_remove_final(&list);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 82 | 100.00% | 2 | 100.00% |
Total | 82 | 100.00% | 2 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mark Brown | 80 | 100.00% | 1 | 100.00% |
Total | 80 | 100.00% | 1 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Mark Brown | 72 | 100.00% | 1 | 100.00% |
Total | 72 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_unregister_algs);
int crypto_register_template(struct crypto_template *tmpl)
{
struct crypto_template *q;
int err = -EEXIST;
down_write(&crypto_alg_sem);
crypto_check_module_sig(tmpl->module);
list_for_each_entry(q, &crypto_template_list, list) {
if (q == tmpl)
goto out;
}
list_add(&tmpl->list, &crypto_template_list);
crypto_notify(CRYPTO_MSG_TMPL_REGISTER, tmpl);
err = 0;
out:
up_write(&crypto_alg_sem);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 79 | 91.86% | 2 | 66.67% |
Jarod Wilson | 7 | 8.14% | 1 | 33.33% |
Total | 86 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_register_template);
void crypto_unregister_template(struct crypto_template *tmpl)
{
struct crypto_instance *inst;
struct hlist_node *n;
struct hlist_head *list;
LIST_HEAD(users);
down_write(&crypto_alg_sem);
BUG_ON(list_empty(&tmpl->list));
list_del_init(&tmpl->list);
list = &tmpl->instances;
hlist_for_each_entry(inst, list, list) {
int err = crypto_remove_alg(&inst->alg, &users);
BUG_ON(err);
}
crypto_notify(CRYPTO_MSG_TMPL_UNREGISTER, tmpl);
up_write(&crypto_alg_sem);
hlist_for_each_entry_safe(inst, n, list, list) {
BUG_ON(atomic_read(&inst->alg.cra_refcnt) != 1);
crypto_free_instance(inst);
}
crypto_remove_final(&users);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 142 | 100.00% | 4 | 100.00% |
Total | 142 | 100.00% | 4 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 77 | 100.00% | 1 | 100.00% |
Total | 77 | 100.00% | 1 | 100.00% |
struct crypto_template *crypto_lookup_template(const char *name)
{
return try_then_request_module(__crypto_lookup_template(name),
"crypto-%s", name);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 23 | 92.00% | 1 | 33.33% |
Kees Cook | 2 | 8.00% | 2 | 66.67% |
Total | 25 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_lookup_template);
int crypto_register_instance(struct crypto_template *tmpl,
struct crypto_instance *inst)
{
struct crypto_larval *larval;
int err;
err = crypto_check_alg(&inst->alg);
if (err)
return err;
inst->alg.cra_module = tmpl->module;
inst->alg.cra_flags |= CRYPTO_ALG_INSTANCE;
if (unlikely(!crypto_mod_get(&inst->alg)))
return -EAGAIN;
down_write(&crypto_alg_sem);
larval = __crypto_register_alg(&inst->alg);
if (IS_ERR(larval))
goto unlock;
hlist_add_head(&inst->list, &tmpl->instances);
inst->tmpl = tmpl;
unlock:
up_write(&crypto_alg_sem);
err = PTR_ERR(larval);
if (IS_ERR(larval))
goto err;
crypto_wait_for_test(larval);
/* Remove instance if test failed */
if (!(inst->alg.cra_flags & CRYPTO_ALG_TESTED))
crypto_unregister_instance(inst);
err = 0;
err:
crypto_mod_put(&inst->alg);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 150 | 80.21% | 4 | 66.67% |
Stephan Mueller | 29 | 15.51% | 1 | 16.67% |
Steffen Klassert | 8 | 4.28% | 1 | 16.67% |
Total | 187 | 100.00% | 6 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Steffen Klassert | 42 | 73.68% | 1 | 33.33% |
Herbert Xu | 15 | 26.32% | 2 | 66.67% |
Total | 57 | 100.00% | 3 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 89 | 100.00% | 2 | 100.00% |
Total | 89 | 100.00% | 2 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 77 | 100.00% | 1 | 100.00% |
Total | 77 | 100.00% | 1 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 80 | 100.00% | 1 | 100.00% |
Total | 80 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_grab_spawn);
void crypto_drop_spawn(struct crypto_spawn *spawn)
{
if (!spawn->alg)
return;
down_write(&crypto_alg_sem);
list_del(&spawn->list);
up_write(&crypto_alg_sem);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 38 | 100.00% | 2 | 100.00% |
Total | 38 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_drop_spawn);
static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
{
struct crypto_alg *alg;
struct crypto_alg *alg2;
down_read(&crypto_alg_sem);
alg = spawn->alg;
alg2 = alg;
if (alg2)
alg2 = crypto_mod_get(alg2);
up_read(&crypto_alg_sem);
if (!alg2) {
if (alg)
crypto_shoot_alg(alg);
return ERR_PTR(-EAGAIN);
}
return alg;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 82 | 100.00% | 2 | 100.00% |
Total | 82 | 100.00% | 2 | 100.00% |
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Herbert Xu | 108 | 100.00% | 4 | 100.00% |
Total | 108 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(crypto_spawn_tfm);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn)
{
struct crypto_alg *alg;
struct crypto_tfm *tfm;