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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> | |
e0751257 | 17 | #include <linux/key.h> |
f381c272 | 18 | |
45e2472e | 19 | /* iint action cache flags */ |
f578c08e MZ |
20 | #define IMA_MEASURE 0x00000001 |
21 | #define IMA_MEASURED 0x00000002 | |
22 | #define IMA_APPRAISE 0x00000004 | |
23 | #define IMA_APPRAISED 0x00000008 | |
24 | /*#define IMA_COLLECT 0x00000010 do not use this flag */ | |
25 | #define IMA_COLLECTED 0x00000020 | |
26 | #define IMA_AUDIT 0x00000040 | |
27 | #define IMA_AUDITED 0x00000080 | |
45e2472e | 28 | |
f381c272 | 29 | /* iint cache flags */ |
f578c08e MZ |
30 | #define IMA_ACTION_FLAGS 0xff000000 |
31 | #define IMA_DIGSIG 0x01000000 | |
32 | #define IMA_DIGSIG_REQUIRED 0x02000000 | |
45e2472e | 33 | |
d79d72e0 MZ |
34 | #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \ |
35 | IMA_APPRAISE_SUBMASK) | |
36 | #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \ | |
37 | IMA_COLLECTED | IMA_APPRAISED_SUBMASK) | |
38 | ||
39 | /* iint subaction appraise cache flags */ | |
40 | #define IMA_FILE_APPRAISE 0x00000100 | |
41 | #define IMA_FILE_APPRAISED 0x00000200 | |
42 | #define IMA_MMAP_APPRAISE 0x00000400 | |
43 | #define IMA_MMAP_APPRAISED 0x00000800 | |
44 | #define IMA_BPRM_APPRAISE 0x00001000 | |
45 | #define IMA_BPRM_APPRAISED 0x00002000 | |
46 | #define IMA_MODULE_APPRAISE 0x00004000 | |
47 | #define IMA_MODULE_APPRAISED 0x00008000 | |
48 | #define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \ | |
49 | IMA_BPRM_APPRAISE | IMA_MODULE_APPRAISE) | |
50 | #define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \ | |
51 | IMA_BPRM_APPRAISED | IMA_MODULE_APPRAISED) | |
f381c272 | 52 | |
6be5cc52 DK |
53 | enum evm_ima_xattr_type { |
54 | IMA_XATTR_DIGEST = 0x01, | |
55 | EVM_XATTR_HMAC, | |
56 | EVM_IMA_XATTR_DIGSIG, | |
57 | }; | |
58 | ||
59 | struct evm_ima_xattr_data { | |
60 | u8 type; | |
61 | u8 digest[SHA1_DIGEST_SIZE]; | |
62 | } __attribute__((packed)); | |
63 | ||
f381c272 MZ |
64 | /* integrity data associated with an inode */ |
65 | struct integrity_iint_cache { | |
66 | struct rb_node rb_node; /* rooted in integrity_iint_tree */ | |
67 | struct inode *inode; /* back pointer to inode in question */ | |
68 | u64 version; /* track inode changes */ | |
f578c08e | 69 | unsigned long flags; |
5a44b412 | 70 | struct evm_ima_xattr_data ima_xattr; |
d79d72e0 MZ |
71 | enum integrity_status ima_file_status:4; |
72 | enum integrity_status ima_mmap_status:4; | |
73 | enum integrity_status ima_bprm_status:4; | |
74 | enum integrity_status ima_module_status:4; | |
ee866331 | 75 | enum integrity_status evm_status:4; |
f381c272 MZ |
76 | }; |
77 | ||
78 | /* rbtree tree calls to lookup, insert, delete | |
79 | * integrity data associated with an inode. | |
80 | */ | |
81 | struct integrity_iint_cache *integrity_iint_insert(struct inode *inode); | |
82 | struct integrity_iint_cache *integrity_iint_find(struct inode *inode); | |
4892722e | 83 | |
8607c501 DK |
84 | #define INTEGRITY_KEYRING_EVM 0 |
85 | #define INTEGRITY_KEYRING_MODULE 1 | |
86 | #define INTEGRITY_KEYRING_IMA 2 | |
87 | #define INTEGRITY_KEYRING_MAX 3 | |
88 | ||
f1be242c | 89 | #ifdef CONFIG_INTEGRITY_SIGNATURE |
8607c501 DK |
90 | |
91 | int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, | |
92 | const char *digest, int digestlen); | |
93 | ||
94 | #else | |
95 | ||
96 | static inline int integrity_digsig_verify(const unsigned int id, | |
97 | const char *sig, int siglen, | |
98 | const char *digest, int digestlen) | |
99 | { | |
100 | return -EOPNOTSUPP; | |
101 | } | |
102 | ||
f1be242c | 103 | #endif /* CONFIG_INTEGRITY_SIGNATURE */ |
8607c501 | 104 | |
e0751257 DK |
105 | #ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS |
106 | int asymmetric_verify(struct key *keyring, const char *sig, | |
107 | int siglen, const char *data, int datalen); | |
108 | #else | |
109 | static inline int asymmetric_verify(struct key *keyring, const char *sig, | |
110 | int siglen, const char *data, int datalen) | |
111 | { | |
112 | return -EOPNOTSUPP; | |
113 | } | |
114 | #endif | |
115 | ||
4892722e JM |
116 | /* set during initialization */ |
117 | extern int iint_initialized; |