mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-23 20:24:12 +08:00
2b6aa412ff
Replace struct key's restrict_link function pointer with a pointer to the new struct key_restriction. The structure contains pointers to the restriction function as well as relevant data for evaluating the restriction. The garbage collector checks restrict_link->keytype when key types are unregistered. Restrictions involving a removed key type are converted to use restrict_link_reject so that restrictions cannot be removed by unregistering key types. Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2015 Juniper Networks, Inc.
|
|
*
|
|
* Author:
|
|
* Petko Manolov <petko.manolov@konsulko.com>
|
|
*
|
|
* 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, version 2 of the
|
|
* License.
|
|
*
|
|
*/
|
|
|
|
#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
|
|
*/
|
|
__init int ima_mok_init(void)
|
|
{
|
|
struct key_restriction *restriction;
|
|
|
|
pr_notice("Allocating IMA blacklist keyring.\n");
|
|
|
|
restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
|
|
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,
|
|
restriction, NULL);
|
|
|
|
if (IS_ERR(ima_blacklist_keyring))
|
|
panic("Can't allocate IMA blacklist keyring.");
|
|
|
|
set_bit(KEY_FLAG_KEEP, &ima_blacklist_keyring->flags);
|
|
return 0;
|
|
}
|
|
device_initcall(ima_mok_init);
|