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f381c272 MZ |
1 | /* |
2 | * Copyright (C) 2009-2010 IBM Corporation | |
3 | * | |
4 | * Authors: | |
5 | * Mimi Zohar <zohar@us.ibm.com> | |
6 | * | |
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 | |
10 | * License. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/types.h> | |
15 | #include <linux/integrity.h> | |
16 | #include <crypto/sha.h> | |
17 | ||
18 | /* iint cache flags */ | |
19 | #define IMA_MEASURED 0x01 | |
20 | ||
6be5cc52 DK |
21 | enum evm_ima_xattr_type { |
22 | IMA_XATTR_DIGEST = 0x01, | |
23 | EVM_XATTR_HMAC, | |
24 | EVM_IMA_XATTR_DIGSIG, | |
25 | }; | |
26 | ||
27 | struct evm_ima_xattr_data { | |
28 | u8 type; | |
29 | u8 digest[SHA1_DIGEST_SIZE]; | |
30 | } __attribute__((packed)); | |
31 | ||
f381c272 MZ |
32 | /* integrity data associated with an inode */ |
33 | struct integrity_iint_cache { | |
34 | struct rb_node rb_node; /* rooted in integrity_iint_tree */ | |
35 | struct inode *inode; /* back pointer to inode in question */ | |
36 | u64 version; /* track inode changes */ | |
37 | unsigned char flags; | |
38 | u8 digest[SHA1_DIGEST_SIZE]; | |
39 | struct mutex mutex; /* protects: version, flags, digest */ | |
66dbc325 | 40 | enum integrity_status hmac_status; |
f381c272 MZ |
41 | }; |
42 | ||
43 | /* rbtree tree calls to lookup, insert, delete | |
44 | * integrity data associated with an inode. | |
45 | */ | |
46 | struct integrity_iint_cache *integrity_iint_insert(struct inode *inode); | |
47 | struct integrity_iint_cache *integrity_iint_find(struct inode *inode); |