LXR linux/security/integrity/ima/ima

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2015 Juniper Networks, Inc.
   4 *
   5 * Author:
   6 * Petko Manolov <petko.manolov@konsulko.com>
   7 */
   8
   9#include <linux/export.h>
  10#include <linux/kernel.h>
  11#include <linux/sched.h>
  12#include <linux/cred.h>
  13#include <linux/err.h>
  14#include <linux/init.h>
  15#include <linux/slab.h>
  16#include <keys/system_keyring.h>
  17
  18
  19struct key *ima_blacklist_keyring;
  20
  21/*
  22 * Allocate the IMA blacklist keyring
  23 */
  24__init int ima_mok_init(void)
  25{
  26        struct key_restriction *restriction;
  27
  28        pr_notice("Allocating IMA blacklist keyring.\n");
  29
  30        restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
  31        if (!restriction)
  32                panic("Can't allocate IMA blacklist restriction.");
  33
  34        restriction->check = restrict_link_by_builtin_trusted;
  35
  36        ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
  37                                KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
  38                                (KEY_POS_ALL & ~KEY_POS_SETATTR) |
  39                                KEY_USR_VIEW | KEY_USR_READ |
  40                                KEY_USR_WRITE | KEY_USR_SEARCH,
  41                                KEY_ALLOC_NOT_IN_QUOTA |
  42                                KEY_ALLOC_SET_KEEP,
  43                                restriction, NULL);
  44
  45        if (IS_ERR(ima_blacklist_keyring))
  46                panic("Can't allocate IMA blacklist keyring.");
  47        return 0;
  48}
  49device_initcall(ima_mok_init);
  50