2 * Copyright (C) 2009-2010 IBM Corporation
5 * Mimi Zohar <zohar@us.ibm.com>
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
14 #include <linux/types.h>
15 #include <linux/integrity.h>
16 #include <crypto/sha.h>
17 #include <linux/key.h>
19 /* iint action cache flags */
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
29 /* iint cache flags */
30 #define IMA_ACTION_FLAGS 0xff000000
31 #define IMA_DIGSIG 0x01000000
32 #define IMA_DIGSIG_REQUIRED 0x02000000
33 #define IMA_PERMIT_DIRECTIO 0x04000000
34 #define IMA_NEW_FILE 0x08000000
36 #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
38 #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \
39 IMA_COLLECTED | IMA_APPRAISED_SUBMASK)
41 /* iint subaction appraise cache flags */
42 #define IMA_FILE_APPRAISE 0x00000100
43 #define IMA_FILE_APPRAISED 0x00000200
44 #define IMA_MMAP_APPRAISE 0x00000400
45 #define IMA_MMAP_APPRAISED 0x00000800
46 #define IMA_BPRM_APPRAISE 0x00001000
47 #define IMA_BPRM_APPRAISED 0x00002000
48 #define IMA_MODULE_APPRAISE 0x00004000
49 #define IMA_MODULE_APPRAISED 0x00008000
50 #define IMA_FIRMWARE_APPRAISE 0x00010000
51 #define IMA_FIRMWARE_APPRAISED 0x00020000
52 #define IMA_READ_APPRAISE 0x00040000
53 #define IMA_READ_APPRAISED 0x00080000
54 #define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \
55 IMA_BPRM_APPRAISE | IMA_MODULE_APPRAISE | \
56 IMA_FIRMWARE_APPRAISE | IMA_READ_APPRAISE)
57 #define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \
58 IMA_BPRM_APPRAISED | IMA_MODULE_APPRAISED | \
59 IMA_FIRMWARE_APPRAISED | IMA_READ_APPRAISED)
61 enum evm_ima_xattr_type
{
62 IMA_XATTR_DIGEST
= 0x01,
69 struct evm_ima_xattr_data
{
71 u8 digest
[SHA1_DIGEST_SIZE
];
74 #define IMA_MAX_DIGEST_SIZE 64
76 struct ima_digest_data
{
94 * signature format v2 - for using with asymmetric keys
96 struct signature_v2_hdr
{
97 uint8_t type
; /* xattr type */
98 uint8_t version
; /* signature format version */
99 uint8_t hash_algo
; /* Digest algorithm [enum pkey_hash_algo] */
100 uint32_t keyid
; /* IMA key identifier - not X509/PGP specific */
101 uint16_t sig_size
; /* signature size */
102 uint8_t sig
[0]; /* signature payload */
105 /* integrity data associated with an inode */
106 struct integrity_iint_cache
{
107 struct rb_node rb_node
; /* rooted in integrity_iint_tree */
108 struct inode
*inode
; /* back pointer to inode in question */
109 u64 version
; /* track inode changes */
111 enum integrity_status ima_file_status
:4;
112 enum integrity_status ima_mmap_status
:4;
113 enum integrity_status ima_bprm_status
:4;
114 enum integrity_status ima_module_status
:4;
115 enum integrity_status ima_firmware_status
:4;
116 enum integrity_status ima_read_status
:4;
117 enum integrity_status evm_status
:4;
118 struct ima_digest_data
*ima_hash
;
121 /* rbtree tree calls to lookup, insert, delete
122 * integrity data associated with an inode.
124 struct integrity_iint_cache
*integrity_iint_find(struct inode
*inode
);
126 int integrity_kernel_read(struct file
*file
, loff_t offset
,
127 char *addr
, unsigned long count
);
128 int __init
integrity_read_file(const char *path
, char **data
);
130 #define INTEGRITY_KEYRING_EVM 0
131 #define INTEGRITY_KEYRING_IMA 1
132 #define INTEGRITY_KEYRING_MODULE 2
133 #define INTEGRITY_KEYRING_MAX 3
135 #ifdef CONFIG_INTEGRITY_SIGNATURE
137 int integrity_digsig_verify(const unsigned int id
, const char *sig
, int siglen
,
138 const char *digest
, int digestlen
);
140 int __init
integrity_init_keyring(const unsigned int id
);
141 int __init
integrity_load_x509(const unsigned int id
, const char *path
);
144 static inline int integrity_digsig_verify(const unsigned int id
,
145 const char *sig
, int siglen
,
146 const char *digest
, int digestlen
)
151 static inline int integrity_init_keyring(const unsigned int id
)
155 #endif /* CONFIG_INTEGRITY_SIGNATURE */
157 #ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS
158 int asymmetric_verify(struct key
*keyring
, const char *sig
,
159 int siglen
, const char *data
, int datalen
);
161 static inline int asymmetric_verify(struct key
*keyring
, const char *sig
,
162 int siglen
, const char *data
, int datalen
)
168 #ifdef CONFIG_IMA_LOAD_X509
169 void __init
ima_load_x509(void);
171 static inline void ima_load_x509(void)
176 #ifdef CONFIG_EVM_LOAD_X509
177 void __init
evm_load_x509(void);
179 static inline void evm_load_x509(void)
184 #ifdef CONFIG_INTEGRITY_AUDIT
186 void integrity_audit_msg(int audit_msgno
, struct inode
*inode
,
187 const unsigned char *fname
, const char *op
,
188 const char *cause
, int result
, int info
);
190 static inline void integrity_audit_msg(int audit_msgno
, struct inode
*inode
,
191 const unsigned char *fname
,
192 const char *op
, const char *cause
,
193 int result
, int info
)