2 * Copyright (C) 2011 Intel Corporation
5 * Dmitry Kasatkin <dmitry.kasatkin@intel.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, version 2 of the License.
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #include <linux/err.h>
16 #include <linux/sched.h>
17 #include <linux/slab.h>
18 #include <linux/cred.h>
19 #include <linux/key-type.h>
20 #include <linux/digsig.h>
22 #include "integrity.h"
24 static struct key *keyring[INTEGRITY_KEYRING_MAX];
26 static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
27 #ifndef CONFIG_INTEGRITY_TRUSTED_KEYRING
37 #ifdef CONFIG_INTEGRITY_TRUSTED_KEYRING
38 static bool init_keyring __initdata = true;
40 static bool init_keyring __initdata;
43 int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
44 const char *digest, int digestlen)
46 if (id >= INTEGRITY_KEYRING_MAX)
51 request_key(&key_type_keyring, keyring_name[id], NULL);
52 if (IS_ERR(keyring[id])) {
53 int err = PTR_ERR(keyring[id]);
54 pr_err("no %s keyring: %d\n", keyring_name[id], err);
62 /* v1 API expect signature without xattr type */
63 return digsig_verify(keyring[id], sig + 1, siglen - 1,
66 return asymmetric_verify(keyring[id], sig, siglen,
73 int __init integrity_init_keyring(const unsigned int id)
75 const struct cred *cred = current_cred();
81 keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0),
83 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
84 KEY_USR_VIEW | KEY_USR_READ |
85 KEY_USR_WRITE | KEY_USR_SEARCH),
86 KEY_ALLOC_NOT_IN_QUOTA, NULL);
87 if (!IS_ERR(keyring[id]))
88 set_bit(KEY_FLAG_TRUSTED_ONLY, &keyring[id]->flags);
90 err = PTR_ERR(keyring[id]);
91 pr_info("Can't allocate %s keyring (%d)\n",
92 keyring_name[id], err);
98 int __init integrity_load_x509(const unsigned int id, const char *path)
107 rc = integrity_read_file(path, &data);
111 key = key_create_or_update(make_key_ref(keyring[id], 1),
116 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
117 KEY_USR_VIEW | KEY_USR_READ),
118 KEY_ALLOC_NOT_IN_QUOTA);
121 pr_err("Problem loading X.509 certificate (%d): %s\n",
124 pr_notice("Loaded X.509 cert '%s': %s\n",
125 key_ref_to_ptr(key)->description, path);