| 1 | |
| 2 | *
|
| 3 | * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
|
| 4 | * Written by David Howells ([email protected])
|
| 5 | *
|
| 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.
|
| 10 |
|
| 11 |
|
| 12 | #include <linux/export.h>
|
| 13 | #include <linux/kernel.h>
|
| 14 | #include <linux/sched.h>
|
| 15 | #include <linux/cred.h>
|
| 16 | #include <linux/err.h>
|
| 17 | #include <keys/asymmetric-type.h>
|
| 18 | #include <keys/system_keyring.h>
|
| 19 | #include "module-internal.h"
|
| 20 |
|
| 21 | struct key *system_trusted_keyring;
|
| 22 | EXPORT_SYMBOL_GPL(system_trusted_keyring);
|
| 23 |
|
| 24 | extern __initconst const u8 system_certificate_list[];
|
| 25 | extern __initconst const unsigned long system_certificate_list_size;
|
| 26 |
|
| 27 | |
| 28 | * Load the compiled-in keys
|
| 29 |
|
| 30 | static __init int system_trusted_keyring_init(void)
|
| 31 | {
|
| 32 | pr_notice("Initialise system trusted keyring\n");
|
| 33 |
|
| 34 | system_trusted_keyring =
|
| 35 | keyring_alloc(".system_keyring",
|
| 36 | KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
|
| 37 | ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
|
| 38 | KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
|
| 39 | KEY_ALLOC_NOT_IN_QUOTA, NULL);
|
| 40 | if (IS_ERR(system_trusted_keyring))
|
| 41 | panic("Can't allocate system trusted keyring\n");
|
| 42 |
|
| 43 | set_bit(KEY_FLAG_TRUSTED_ONLY, &system_trusted_keyring->flags);
|
| 44 | return 0;
|
| 45 | }
|
| 46 |
|
| 47 | |
| 48 | * Must be initialised before we try and load the keys into the keyring.
|
| 49 |
|
| 50 | device_initcall(system_trusted_keyring_init);
|
| 51 |
|
| 52 | |
| 53 | * Load the compiled-in list of X.509 certificates.
|
| 54 |
|
| 55 | static __init int load_system_certificate_list(void)
|
| 56 | {
|
| 57 | key_ref_t key;
|
| 58 | const u8 *p, *end;
|
| 59 | size_t plen;
|
| 60 |
|
| 61 | pr_notice("Loading compiled-in X.509 certificates\n");
|
| 62 |
|
| 63 | p = system_certificate_list;
|
| 64 | end = p + system_certificate_list_size;
|
| 65 | while (p < end) {
|
| 66 | |
| 67 | * than 256 bytes in size.
|
| 68 |
|
| 69 | if (end - p < 4)
|
| 70 | goto dodgy_cert;
|
| 71 | if (p[0] != 0x30 &&
|
| 72 | p[1] != 0x82)
|
| 73 | goto dodgy_cert;
|
| 74 | plen = (p[2] << 8) | p[3];
|
| 75 | plen += 4;
|
| 76 | if (plen > end - p)
|
| 77 | goto dodgy_cert;
|
| 78 |
|
| 79 | key = key_create_or_update(make_key_ref(system_trusted_keyring, 1),
|
| 80 | "asymmetric",
|
| 81 | NULL,
|
| 82 | p,
|
| 83 | plen,
|
| 84 | ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
|
| 85 | KEY_USR_VIEW | KEY_USR_READ),
|
| 86 | KEY_ALLOC_NOT_IN_QUOTA |
|
| 87 | KEY_ALLOC_TRUSTED);
|
| 88 | if (IS_ERR(key)) {
|
| 89 | pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
|
| 90 | PTR_ERR(key));
|
| 91 | } else {
|
| 92 | set_bit(KEY_FLAG_BUILTIN, &key_ref_to_ptr(key)->flags);
|
| 93 | pr_notice("Loaded X.509 cert '%s'\n",
|
| 94 | key_ref_to_ptr(key)->description);
|
| 95 | key_ref_put(key);
|
| 96 | }
|
| 97 | p += plen;
|
| 98 | }
|
| 99 |
|
| 100 | return 0;
|
| 101 |
|
| 102 | dodgy_cert:
|
| 103 | pr_err("Problem parsing in-kernel X.509 certificate list\n");
|
| 104 | return 0;
|
| 105 | }
|
| 106 | late_initcall(load_system_certificate_list);
|