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6e837fb1 EB |
1 | /* |
2 | * Common LSM logging functions | |
3 | * Heavily borrowed from selinux/avc.h | |
4 | * | |
5 | * Author : Etienne BASSET <etienne.basset@ensta.org> | |
6 | * | |
7 | * All credits to : Stephen Smalley, <sds@epoch.ncsc.mil> | |
8 | * All BUGS to : Etienne BASSET <etienne.basset@ensta.org> | |
9 | */ | |
10 | #ifndef _LSM_COMMON_LOGGING_ | |
11 | #define _LSM_COMMON_LOGGING_ | |
12 | ||
13 | #include <linux/stddef.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/kdev_t.h> | |
17 | #include <linux/spinlock.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/audit.h> | |
20 | #include <linux/in6.h> | |
21 | #include <linux/path.h> | |
22 | #include <linux/key.h> | |
23 | #include <linux/skbuff.h> | |
24 | #include <asm/system.h> | |
25 | ||
26 | ||
27 | /* Auxiliary data to use in generating the audit record. */ | |
28 | struct common_audit_data { | |
29 | char type; | |
30 | #define LSM_AUDIT_DATA_FS 1 | |
31 | #define LSM_AUDIT_DATA_NET 2 | |
32 | #define LSM_AUDIT_DATA_CAP 3 | |
33 | #define LSM_AUDIT_DATA_IPC 4 | |
34 | #define LSM_AUDIT_DATA_TASK 5 | |
35 | #define LSM_AUDIT_DATA_KEY 6 | |
2bf49690 | 36 | #define LSM_AUDIT_NO_AUDIT 7 |
6e837fb1 EB |
37 | struct task_struct *tsk; |
38 | union { | |
39 | struct { | |
40 | struct path path; | |
41 | struct inode *inode; | |
42 | } fs; | |
43 | struct { | |
44 | int netif; | |
45 | struct sock *sk; | |
46 | u16 family; | |
47 | __be16 dport; | |
48 | __be16 sport; | |
49 | union { | |
50 | struct { | |
51 | __be32 daddr; | |
52 | __be32 saddr; | |
53 | } v4; | |
54 | struct { | |
55 | struct in6_addr daddr; | |
56 | struct in6_addr saddr; | |
57 | } v6; | |
58 | } fam; | |
59 | } net; | |
60 | int cap; | |
61 | int ipc_id; | |
62 | struct task_struct *tsk; | |
63 | #ifdef CONFIG_KEYS | |
64 | struct { | |
65 | key_serial_t key; | |
66 | char *key_desc; | |
67 | } key_struct; | |
68 | #endif | |
69 | } u; | |
6e837fb1 EB |
70 | /* this union contains LSM specific data */ |
71 | union { | |
65c3f0a2 | 72 | #ifdef CONFIG_SECURITY_SMACK |
6e837fb1 EB |
73 | /* SMACK data */ |
74 | struct smack_audit_data { | |
ed5215a2 | 75 | const char *function; |
6e837fb1 EB |
76 | char *subject; |
77 | char *object; | |
78 | char *request; | |
79 | int result; | |
80 | } smack_audit_data; | |
65c3f0a2 TL |
81 | #endif |
82 | #ifdef CONFIG_SECURITY_SELINUX | |
6e837fb1 EB |
83 | /* SELinux data */ |
84 | struct { | |
85 | u32 ssid; | |
86 | u32 tsid; | |
87 | u16 tclass; | |
88 | u32 requested; | |
89 | u32 audited; | |
2bf49690 | 90 | u32 denied; |
6e837fb1 EB |
91 | struct av_decision *avd; |
92 | int result; | |
93 | } selinux_audit_data; | |
65c3f0a2 | 94 | #endif |
d4131ded | 95 | }; |
6e837fb1 EB |
96 | /* these callback will be implemented by a specific LSM */ |
97 | void (*lsm_pre_audit)(struct audit_buffer *, void *); | |
98 | void (*lsm_post_audit)(struct audit_buffer *, void *); | |
99 | }; | |
100 | ||
101 | #define v4info fam.v4 | |
102 | #define v6info fam.v6 | |
103 | ||
104 | int ipv4_skb_to_auditdata(struct sk_buff *skb, | |
105 | struct common_audit_data *ad, u8 *proto); | |
106 | ||
107 | int ipv6_skb_to_auditdata(struct sk_buff *skb, | |
108 | struct common_audit_data *ad, u8 *proto); | |
109 | ||
110 | /* Initialize an LSM audit data structure. */ | |
111 | #define COMMON_AUDIT_DATA_INIT(_d, _t) \ | |
112 | { memset((_d), 0, sizeof(struct common_audit_data)); \ | |
ed5215a2 | 113 | (_d)->type = LSM_AUDIT_DATA_##_t; } |
6e837fb1 EB |
114 | |
115 | void common_lsm_audit(struct common_audit_data *a); | |
116 | ||
117 | #endif |