projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |
| 45e2472e DK |
29 | #define IMA_DIGSIG 0x0100 |
| 30 | ||
| e7c568e0 PM |
31 | #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT) |
| 32 | #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED \ | |
| 33 | | IMA_COLLECTED) | |
| f381c272 | 34 | |
| 6be5cc52 DK |
35 | enum evm_ima_xattr_type { |
| 36 | IMA_XATTR_DIGEST = 0x01, | |
| 37 | EVM_XATTR_HMAC, | |
| 38 | EVM_IMA_XATTR_DIGSIG, | |
| 39 | }; | |
| 40 | ||
| 41 | struct evm_ima_xattr_data { | |
| 42 | u8 type; | |
| 43 | u8 digest[SHA1_DIGEST_SIZE]; | |
| 44 | } __attribute__((packed)); | |
| 45 | ||
| f381c272 MZ |
46 | /* integrity data associated with an inode */ |
| 47 | struct integrity_iint_cache { | |
| 48 | struct rb_node rb_node; /* rooted in integrity_iint_tree */ | |
| 49 | struct inode *inode; /* back pointer to inode in question */ | |
| 50 | u64 version; /* track inode changes */ | |
| 0a72ba7a | 51 | unsigned short flags; |
| 5a44b412 | 52 | struct evm_ima_xattr_data ima_xattr; |
| 2fe5d6de | 53 | enum integrity_status ima_status; |
| 24e0198e | 54 | enum integrity_status evm_status; |
| f381c272 MZ |
55 | }; |
| 56 | ||
| 57 | /* rbtree tree calls to lookup, insert, delete | |
| 58 | * integrity data associated with an inode. | |
| 59 | */ | |
| 60 | struct integrity_iint_cache *integrity_iint_insert(struct inode *inode); | |
| 61 | struct integrity_iint_cache *integrity_iint_find(struct inode *inode); | |
| 4892722e | 62 | |
| 8607c501 DK |
63 | #define INTEGRITY_KEYRING_EVM 0 |
| 64 | #define INTEGRITY_KEYRING_MODULE 1 | |
| 65 | #define INTEGRITY_KEYRING_IMA 2 | |
| 66 | #define INTEGRITY_KEYRING_MAX 3 | |
| 67 | ||
| f1be242c | 68 | #ifdef CONFIG_INTEGRITY_SIGNATURE |
| 8607c501 DK |
69 | |
| 70 | int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, | |
| 71 | const char *digest, int digestlen); | |
| 72 | ||
| 73 | #else | |
| 74 | ||
| 75 | static inline int integrity_digsig_verify(const unsigned int id, | |
| 76 | const char *sig, int siglen, | |
| 77 | const char *digest, int digestlen) | |
| 78 | { | |
| 79 | return -EOPNOTSUPP; | |
| 80 | } | |
| 81 | ||
| f1be242c | 82 | #endif /* CONFIG_INTEGRITY_SIGNATURE */ |
| 8607c501 | 83 | |
| 4892722e JM |
84 | /* set during initialization */ |
| 85 | extern int iint_initialized; |