irqchip: brcmstb-l2: Fix error handling of irq_of_parse_and_map
[cascardo/linux.git] / security / integrity / integrity.h
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 #include <linux/key.h>
18
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
28
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
35
36 #define IMA_DO_MASK             (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
37                                  IMA_APPRAISE_SUBMASK)
38 #define IMA_DONE_MASK           (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \
39                                  IMA_COLLECTED | IMA_APPRAISED_SUBMASK)
40
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_APPRAISE_SUBMASK    (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \
53                                  IMA_BPRM_APPRAISE | IMA_MODULE_APPRAISE | \
54                                  IMA_FIRMWARE_APPRAISE)
55 #define IMA_APPRAISED_SUBMASK   (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \
56                                  IMA_BPRM_APPRAISED | IMA_MODULE_APPRAISED | \
57                                  IMA_FIRMWARE_APPRAISED)
58
59 enum evm_ima_xattr_type {
60         IMA_XATTR_DIGEST = 0x01,
61         EVM_XATTR_HMAC,
62         EVM_IMA_XATTR_DIGSIG,
63         IMA_XATTR_DIGEST_NG,
64 };
65
66 struct evm_ima_xattr_data {
67         u8 type;
68         u8 digest[SHA1_DIGEST_SIZE];
69 } __packed;
70
71 #define IMA_MAX_DIGEST_SIZE     64
72
73 struct ima_digest_data {
74         u8 algo;
75         u8 length;
76         union {
77                 struct {
78                         u8 unused;
79                         u8 type;
80                 } sha1;
81                 struct {
82                         u8 type;
83                         u8 algo;
84                 } ng;
85                 u8 data[2];
86         } xattr;
87         u8 digest[0];
88 } __packed;
89
90 /*
91  * signature format v2 - for using with asymmetric keys
92  */
93 struct signature_v2_hdr {
94         uint8_t type;           /* xattr type */
95         uint8_t version;        /* signature format version */
96         uint8_t hash_algo;      /* Digest algorithm [enum pkey_hash_algo] */
97         uint32_t keyid;         /* IMA key identifier - not X509/PGP specific */
98         uint16_t sig_size;      /* signature size */
99         uint8_t sig[0];         /* signature payload */
100 } __packed;
101
102 /* integrity data associated with an inode */
103 struct integrity_iint_cache {
104         struct rb_node rb_node; /* rooted in integrity_iint_tree */
105         struct inode *inode;    /* back pointer to inode in question */
106         u64 version;            /* track inode changes */
107         unsigned long flags;
108         enum integrity_status ima_file_status:4;
109         enum integrity_status ima_mmap_status:4;
110         enum integrity_status ima_bprm_status:4;
111         enum integrity_status ima_module_status:4;
112         enum integrity_status ima_firmware_status:4;
113         enum integrity_status evm_status:4;
114         struct ima_digest_data *ima_hash;
115 };
116
117 /* rbtree tree calls to lookup, insert, delete
118  * integrity data associated with an inode.
119  */
120 struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
121
122 #define INTEGRITY_KEYRING_EVM           0
123 #define INTEGRITY_KEYRING_MODULE        1
124 #define INTEGRITY_KEYRING_IMA           2
125 #define INTEGRITY_KEYRING_MAX           3
126
127 #ifdef CONFIG_INTEGRITY_SIGNATURE
128
129 int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
130                             const char *digest, int digestlen);
131
132 int integrity_init_keyring(const unsigned int id);
133 #else
134
135 static inline int integrity_digsig_verify(const unsigned int id,
136                                           const char *sig, int siglen,
137                                           const char *digest, int digestlen)
138 {
139         return -EOPNOTSUPP;
140 }
141
142 static inline int integrity_init_keyring(const unsigned int id)
143 {
144         return 0;
145 }
146 #endif /* CONFIG_INTEGRITY_SIGNATURE */
147
148 #ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS
149 int asymmetric_verify(struct key *keyring, const char *sig,
150                       int siglen, const char *data, int datalen);
151 #else
152 static inline int asymmetric_verify(struct key *keyring, const char *sig,
153                                     int siglen, const char *data, int datalen)
154 {
155         return -EOPNOTSUPP;
156 }
157 #endif
158
159 #ifdef CONFIG_INTEGRITY_AUDIT
160 /* declarations */
161 void integrity_audit_msg(int audit_msgno, struct inode *inode,
162                          const unsigned char *fname, const char *op,
163                          const char *cause, int result, int info);
164 #else
165 static inline void integrity_audit_msg(int audit_msgno, struct inode *inode,
166                                        const unsigned char *fname,
167                                        const char *op, const char *cause,
168                                        int result, int info)
169 {
170 }
171 #endif
172
173 /* set during initialization */
174 extern int iint_initialized;