security/integrity/ima/ima_mok.c

   1 /*
   2  * Copyright (C) 2015 Juniper Networks, Inc.
   3  *
   4  * Author:
   5  * Petko Manolov <petko.manolov@konsulko.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation, version 2 of the
  10  * License.
  11  *
  12  */
  13
  14 #include <linux/export.h>
  15 #include <linux/kernel.h>
  16 #include <linux/sched.h>
  17 #include <linux/cred.h>
  18 #include <linux/err.h>
  19 #include <linux/init.h>
  20 #include <keys/system_keyring.h>
  21
  22
  23 struct key *ima_blacklist_keyring;
  24
  25 /*
  26  * Allocate the IMA blacklist keyring
  27  */
  28 __init int ima_mok_init(void)
  29 {
  30         pr_notice("Allocating IMA blacklist keyring.\n");
  31
  32         ima_blacklist_keyring = keyring_alloc(".ima_blacklist",
  33                                 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
  34                                 (KEY_POS_ALL & ~KEY_POS_SETATTR) |
  35                                 KEY_USR_VIEW | KEY_USR_READ |
  36                                 KEY_USR_WRITE | KEY_USR_SEARCH,
  37                                 KEY_ALLOC_NOT_IN_QUOTA,
  38                                 restrict_link_by_builtin_trusted, NULL);
  39
  40         if (IS_ERR(ima_blacklist_keyring))
  41                 panic("Can't allocate IMA blacklist keyring.");
  42
  43         set_bit(KEY_FLAG_KEEP, &ima_blacklist_keyring->flags);
  44         return 0;
  45 }
  46 device_initcall(ima_mok_init);