// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Juniper Networks, Inc.
 *
 * Author:
 * Petko Manolov <petko.manolov@konsulko.com>
 */

#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/cred.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <keys/system_keyring.h>


struct key *ima_blacklist_keyring;

/*
 * Allocate the IMA blacklist keyring
 */
static __init int ima_mok_init(void)
{
        struct key_restriction *restriction;

        pr_notice("Allocating IMA blacklist keyring.\n");

        restriction = kzalloc_obj(struct key_restriction);
        if (!restriction)
                panic("Can't allocate IMA blacklist restriction.");

        restriction->check = restrict_link_by_builtin_trusted;

        ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
                                KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
                                (KEY_POS_ALL & ~KEY_POS_SETATTR) |
                                KEY_USR_VIEW | KEY_USR_READ |
                                KEY_USR_WRITE | KEY_USR_SEARCH,
                                KEY_ALLOC_NOT_IN_QUOTA |
                                KEY_ALLOC_SET_KEEP,
                                restriction, NULL);

        if (IS_ERR(ima_blacklist_keyring))
                panic("Can't allocate IMA blacklist keyring.");
        return 0;
}
device_initcall(ima_mok_init);