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/rbtree.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 #ifdef CONFIG_IMA_TRUSTED_KEYRING
27 static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
33 static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
40 int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
41 const char *digest, int digestlen)
43 if (id >= INTEGRITY_KEYRING_MAX)
48 request_key(&key_type_keyring, keyring_name[id], NULL);
49 if (IS_ERR(keyring[id])) {
50 int err = PTR_ERR(keyring[id]);
51 pr_err("no %s keyring: %d\n", keyring_name[id], err);
59 /* v1 API expect signature without xattr type */
60 return digsig_verify(keyring[id], sig + 1, siglen - 1,
63 return asymmetric_verify(keyring[id], sig, siglen,
70 int integrity_init_keyring(const unsigned int id)
72 const struct cred *cred = current_cred();
73 const struct user_struct *user = cred->user;
75 keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0),
77 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
78 KEY_USR_VIEW | KEY_USR_READ),
79 KEY_ALLOC_NOT_IN_QUOTA, user->uid_keyring);
80 if (!IS_ERR(keyring[id]))
81 set_bit(KEY_FLAG_TRUSTED_ONLY, &keyring[id]->flags);
83 pr_info("Can't allocate %s keyring (%ld)\n",
84 keyring_name[id], PTR_ERR(keyring[id]));