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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 | ||
45e2472e DK |
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 | |
e7c568e0 PM |
25 | #define IMA_AUDIT 0x0040 |
26 | #define IMA_AUDITED 0x0080 | |
45e2472e | 27 | |
f381c272 | 28 | /* iint cache flags */ |
0e5a247c | 29 | #define IMA_ACTION_FLAGS 0xff00 |
45e2472e | 30 | #define IMA_DIGSIG 0x0100 |
0e5a247c | 31 | #define IMA_DIGSIG_REQUIRED 0x0200 |
45e2472e | 32 | |
e7c568e0 PM |
33 | #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT) |
34 | #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED \ | |
35 | | IMA_COLLECTED) | |
f381c272 | 36 | |
6be5cc52 DK |
37 | enum evm_ima_xattr_type { |
38 | IMA_XATTR_DIGEST = 0x01, | |
39 | EVM_XATTR_HMAC, | |
40 | EVM_IMA_XATTR_DIGSIG, | |
41 | }; | |
42 | ||
43 | struct evm_ima_xattr_data { | |
44 | u8 type; | |
45 | u8 digest[SHA1_DIGEST_SIZE]; | |
46 | } __attribute__((packed)); | |
47 | ||
f381c272 MZ |
48 | /* integrity data associated with an inode */ |
49 | struct integrity_iint_cache { | |
50 | struct rb_node rb_node; /* rooted in integrity_iint_tree */ | |
51 | struct inode *inode; /* back pointer to inode in question */ | |
52 | u64 version; /* track inode changes */ | |
0a72ba7a | 53 | unsigned short flags; |
5a44b412 | 54 | struct evm_ima_xattr_data ima_xattr; |
ee866331 DK |
55 | enum integrity_status ima_status:4; |
56 | enum integrity_status evm_status:4; | |
f381c272 MZ |
57 | }; |
58 | ||
59 | /* rbtree tree calls to lookup, insert, delete | |
60 | * integrity data associated with an inode. | |
61 | */ | |
62 | struct integrity_iint_cache *integrity_iint_insert(struct inode *inode); | |
63 | struct integrity_iint_cache *integrity_iint_find(struct inode *inode); | |
4892722e | 64 | |
8607c501 DK |
65 | #define INTEGRITY_KEYRING_EVM 0 |
66 | #define INTEGRITY_KEYRING_MODULE 1 | |
67 | #define INTEGRITY_KEYRING_IMA 2 | |
68 | #define INTEGRITY_KEYRING_MAX 3 | |
69 | ||
f1be242c | 70 | #ifdef CONFIG_INTEGRITY_SIGNATURE |
8607c501 DK |
71 | |
72 | int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, | |
73 | const char *digest, int digestlen); | |
74 | ||
75 | #else | |
76 | ||
77 | static inline int integrity_digsig_verify(const unsigned int id, | |
78 | const char *sig, int siglen, | |
79 | const char *digest, int digestlen) | |
80 | { | |
81 | return -EOPNOTSUPP; | |
82 | } | |
83 | ||
f1be242c | 84 | #endif /* CONFIG_INTEGRITY_SIGNATURE */ |
8607c501 | 85 | |
4892722e JM |
86 | /* set during initialization */ |
87 | extern int iint_initialized; |