Mimi Zohar | f381c27 | 2011-03-09 14:13:22 -0500 | [diff] [blame] | 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 | |
Dmitry Kasatkin | 6be5cc5 | 2011-03-09 14:28:20 -0500 | [diff] [blame] | 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 | |
Mimi Zohar | f381c27 | 2011-03-09 14:13:22 -0500 | [diff] [blame] | 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 */ |
Dmitry Kasatkin | 24e0198 | 2011-05-06 11:34:17 +0300 | [diff] [blame] | 40 | enum integrity_status evm_status; |
Mimi Zohar | f381c27 | 2011-03-09 14:13:22 -0500 | [diff] [blame] | 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); |
James Morris | 4892722 | 2011-08-17 10:34:33 +1000 | [diff] [blame] | 48 | |
| 49 | /* set during initialization */ |
| 50 | extern int iint_initialized; |