linux/security/keys/persistent.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* General persistent per-UID keyrings register
 *
 * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#include <linux/user_namespace.h>
#include <linux/cred.h>

#include "internal.h"

unsigned persistent_keyring_expiry = …; /* Expire after 3 days of non-use */

/*
 * Create the persistent keyring register for the current user namespace.
 *
 * Called with the namespace's sem locked for writing.
 */
static int key_create_persistent_register(struct user_namespace *ns)
{ … }

/*
 * Create the persistent keyring for the specified user.
 *
 * Called with the namespace's sem locked for writing.
 */
static key_ref_t key_create_persistent(struct user_namespace *ns, kuid_t uid,
				       struct keyring_index_key *index_key)
{ … }

/*
 * Get the persistent keyring for a specific UID and link it to the nominated
 * keyring.
 */
static long key_get_persistent(struct user_namespace *ns, kuid_t uid,
			       key_ref_t dest_ref)
{ … }

/*
 * Get the persistent keyring for a specific UID and link it to the nominated
 * keyring.
 */
long keyctl_get_persistent(uid_t _uid, key_serial_t destid)
{ … }