2 * Copyright (C) 2009-2010 IBM Corporation
5 * Mimi Zohar <zohar@us.ibm.com>
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
14 #include <linux/types.h>
15 #include <linux/integrity.h>
16 #include <crypto/sha.h>
18 /* iint action cache flags */
19 #define IMA_MEASURE 0x0001
20 #define IMA_MEASURED 0x0002
21 #define IMA_APPRAISE 0x0004
22 #define IMA_APPRAISED 0x0008
23 /*#define IMA_COLLECT 0x0010 do not use this flag */
24 #define IMA_COLLECTED 0x0020
26 /* iint cache flags */
27 #define IMA_DIGSIG 0x0100
29 #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE)
30 #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_COLLECTED)
32 enum evm_ima_xattr_type {
33 IMA_XATTR_DIGEST = 0x01,
38 struct evm_ima_xattr_data {
40 u8 digest[SHA1_DIGEST_SIZE];
41 } __attribute__((packed));
43 /* integrity data associated with an inode */
44 struct integrity_iint_cache {
45 struct rb_node rb_node; /* rooted in integrity_iint_tree */
46 struct inode *inode; /* back pointer to inode in question */
47 u64 version; /* track inode changes */
49 struct evm_ima_xattr_data ima_xattr;
50 enum integrity_status ima_status;
51 enum integrity_status evm_status;
54 /* rbtree tree calls to lookup, insert, delete
55 * integrity data associated with an inode.
57 struct integrity_iint_cache *integrity_iint_insert(struct inode *inode);
58 struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
60 #define INTEGRITY_KEYRING_EVM 0
61 #define INTEGRITY_KEYRING_MODULE 1
62 #define INTEGRITY_KEYRING_IMA 2
63 #define INTEGRITY_KEYRING_MAX 3
65 #ifdef CONFIG_INTEGRITY_SIGNATURE
67 int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
68 const char *digest, int digestlen);
72 static inline int integrity_digsig_verify(const unsigned int id,
73 const char *sig, int siglen,
74 const char *digest, int digestlen)
79 #endif /* CONFIG_INTEGRITY_SIGNATURE */
81 /* set during initialization */
82 extern int iint_initialized;