1 /* Public keys for module signature verification
3 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
12 #include <linux/kernel.h>
13 #include <linux/sched.h>
14 #include <linux/cred.h>
15 #include <linux/err.h>
16 #include <keys/asymmetric-type.h>
17 #include "module-internal.h"
19 struct key
*modsign_keyring
;
21 extern __initdata
const u8 modsign_certificate_list
[];
22 extern __initdata
const u8 modsign_certificate_list_end
[];
25 * We need to make sure ccache doesn't cache the .o file as it doesn't notice
26 * if modsign.pub changes.
28 static __initdata
const char annoy_ccache
[] = __TIME__
"foo";
31 * Load the compiled-in keys
33 static __init
int module_verify_init(void)
35 pr_notice("Initialise module verification\n");
37 modsign_keyring
= key_alloc(&key_type_keyring
, ".module_sign",
38 KUIDT_INIT(0), KGIDT_INIT(0),
40 (KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
41 KEY_USR_VIEW
| KEY_USR_READ
,
42 KEY_ALLOC_NOT_IN_QUOTA
);
43 if (IS_ERR(modsign_keyring
))
44 panic("Can't allocate module signing keyring\n");
46 if (key_instantiate_and_link(modsign_keyring
, NULL
, 0, NULL
, NULL
) < 0)
47 panic("Can't instantiate module signing keyring\n");
53 * Must be initialised before we try and load the keys into the keyring.
55 device_initcall(module_verify_init
);
58 * Load the compiled-in keys
60 static __init
int load_module_signing_keys(void)
66 pr_notice("Loading module verification certificates\n");
68 end
= modsign_certificate_list_end
;
69 p
= modsign_certificate_list
;
71 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
72 * than 256 bytes in size.
79 plen
= (p
[2] << 8) | p
[3];
84 key
= key_create_or_update(make_key_ref(modsign_keyring
, 1),
89 (KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
91 KEY_ALLOC_NOT_IN_QUOTA
);
93 pr_err("MODSIGN: Problem loading in-kernel X.509 certificate (%ld)\n",
96 pr_notice("MODSIGN: Loaded cert '%s'\n",
97 key_ref_to_ptr(key
)->description
);
104 pr_err("MODSIGN: Problem parsing in-kernel X.509 certificate list\n");
107 late_initcall(load_module_signing_keys
);