1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Common LSM logging functions
4  * Heavily borrowed from selinux/avc.h
5  *
6  * Author : Etienne BASSET  <etienne.basset@ensta.org>
7  *
8  * All credits to : Stephen Smalley, <sds@tycho.nsa.gov>
9  * All BUGS to : Etienne BASSET  <etienne.basset@ensta.org>
10  */
11 #ifndef _LSM_COMMON_LOGGING_
12 #define _LSM_COMMON_LOGGING_
13 
14 #include <linux/stddef.h>
15 #include <linux/errno.h>
16 #include <linux/kernel.h>
17 #include <linux/kdev_t.h>
18 #include <linux/spinlock.h>
19 #include <linux/init.h>
20 #include <linux/audit.h>
21 #include <linux/in6.h>
22 #include <linux/path.h>
23 #include <linux/key.h>
24 #include <linux/skbuff.h>
25 #include <rdma/ib_verbs.h>
26 
27 struct lsm_network_audit {
28 	int netif;
29 	const struct sock *sk;
30 	u16 family;
31 	__be16 dport;
32 	__be16 sport;
33 	union {
34 		struct {
35 			__be32 daddr;
36 			__be32 saddr;
37 		} v4;
38 		struct {
39 			struct in6_addr daddr;
40 			struct in6_addr saddr;
41 		} v6;
42 	} fam;
43 };
44 
45 struct lsm_ioctlop_audit {
46 	struct path path;
47 	u16 cmd;
48 };
49 
50 struct lsm_ibpkey_audit {
51 	u64 subnet_prefix;
52 	u16 pkey;
53 };
54 
55 struct lsm_ibendport_audit {
56 	const char *dev_name;
57 	u8 port;
58 };
59 
60 /* Auxiliary data to use in generating the audit record. */
61 struct common_audit_data {
62 	char type;
63 #define LSM_AUDIT_DATA_PATH	1
64 #define LSM_AUDIT_DATA_NET	2
65 #define LSM_AUDIT_DATA_CAP	3
66 #define LSM_AUDIT_DATA_IPC	4
67 #define LSM_AUDIT_DATA_TASK	5
68 #define LSM_AUDIT_DATA_KEY	6
69 #define LSM_AUDIT_DATA_NONE	7
70 #define LSM_AUDIT_DATA_KMOD	8
71 #define LSM_AUDIT_DATA_INODE	9
72 #define LSM_AUDIT_DATA_DENTRY	10
73 #define LSM_AUDIT_DATA_IOCTL_OP	11
74 #define LSM_AUDIT_DATA_FILE	12
75 #define LSM_AUDIT_DATA_IBPKEY	13
76 #define LSM_AUDIT_DATA_IBENDPORT 14
77 #define LSM_AUDIT_DATA_LOCKDOWN 15
78 #define LSM_AUDIT_DATA_NOTIFICATION 16
79 #define LSM_AUDIT_DATA_ANONINODE	17
80 	union 	{
81 		struct path path;
82 		struct dentry *dentry;
83 		struct inode *inode;
84 		struct lsm_network_audit *net;
85 		int cap;
86 		int ipc_id;
87 		struct task_struct *tsk;
88 #ifdef CONFIG_KEYS
89 		struct {
90 			key_serial_t key;
91 			char *key_desc;
92 		} key_struct;
93 #endif
94 		char *kmod_name;
95 		struct lsm_ioctlop_audit *op;
96 		struct file *file;
97 		struct lsm_ibpkey_audit *ibpkey;
98 		struct lsm_ibendport_audit *ibendport;
99 		int reason;
100 		const char *anonclass;
101 	} u;
102 	/* this union contains LSM specific data */
103 	union {
104 #ifdef CONFIG_SECURITY_SMACK
105 		struct smack_audit_data *smack_audit_data;
106 #endif
107 #ifdef CONFIG_SECURITY_SELINUX
108 		struct selinux_audit_data *selinux_audit_data;
109 #endif
110 #ifdef CONFIG_SECURITY_APPARMOR
111 		struct apparmor_audit_data *apparmor_audit_data;
112 #endif
113 	}; /* per LSM data pointer union */
114 };
115 
116 #define v4info fam.v4
117 #define v6info fam.v6
118 
119 int ipv4_skb_to_auditdata(struct sk_buff *skb,
120 		struct common_audit_data *ad, u8 *proto);
121 
122 int ipv6_skb_to_auditdata(struct sk_buff *skb,
123 		struct common_audit_data *ad, u8 *proto);
124 
125 void common_lsm_audit(struct common_audit_data *a,
126 	void (*pre_audit)(struct audit_buffer *, void *),
127 	void (*post_audit)(struct audit_buffer *, void *));
128 
129 #endif
130