| Etienne Basset | 6e837fb | 2009-04-08 20:39:40 +0200 | [diff] [blame] | 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 |
| 36 | struct task_struct *tsk; |
| 37 | union { |
| 38 | struct { |
| 39 | struct path path; |
| 40 | struct inode *inode; |
| 41 | } fs; |
| 42 | struct { |
| 43 | int netif; |
| 44 | struct sock *sk; |
| 45 | u16 family; |
| 46 | __be16 dport; |
| 47 | __be16 sport; |
| 48 | union { |
| 49 | struct { |
| 50 | __be32 daddr; |
| 51 | __be32 saddr; |
| 52 | } v4; |
| 53 | struct { |
| 54 | struct in6_addr daddr; |
| 55 | struct in6_addr saddr; |
| 56 | } v6; |
| 57 | } fam; |
| 58 | } net; |
| 59 | int cap; |
| 60 | int ipc_id; |
| 61 | struct task_struct *tsk; |
| 62 | #ifdef CONFIG_KEYS |
| 63 | struct { |
| 64 | key_serial_t key; |
| 65 | char *key_desc; |
| 66 | } key_struct; |
| 67 | #endif |
| 68 | } u; |
| 69 | const char *function; |
| 70 | /* this union contains LSM specific data */ |
| 71 | union { |
| 72 | /* SMACK data */ |
| 73 | struct smack_audit_data { |
| 74 | char *subject; |
| 75 | char *object; |
| 76 | char *request; |
| 77 | int result; |
| 78 | } smack_audit_data; |
| 79 | /* SELinux data */ |
| 80 | struct { |
| 81 | u32 ssid; |
| 82 | u32 tsid; |
| 83 | u16 tclass; |
| 84 | u32 requested; |
| 85 | u32 audited; |
| 86 | struct av_decision *avd; |
| 87 | int result; |
| 88 | } selinux_audit_data; |
| 89 | } lsm_priv; |
| 90 | /* these callback will be implemented by a specific LSM */ |
| 91 | void (*lsm_pre_audit)(struct audit_buffer *, void *); |
| 92 | void (*lsm_post_audit)(struct audit_buffer *, void *); |
| 93 | }; |
| 94 | |
| 95 | #define v4info fam.v4 |
| 96 | #define v6info fam.v6 |
| 97 | |
| 98 | int ipv4_skb_to_auditdata(struct sk_buff *skb, |
| 99 | struct common_audit_data *ad, u8 *proto); |
| 100 | |
| 101 | int ipv6_skb_to_auditdata(struct sk_buff *skb, |
| 102 | struct common_audit_data *ad, u8 *proto); |
| 103 | |
| 104 | /* Initialize an LSM audit data structure. */ |
| 105 | #define COMMON_AUDIT_DATA_INIT(_d, _t) \ |
| 106 | { memset((_d), 0, sizeof(struct common_audit_data)); \ |
| 107 | (_d)->type = LSM_AUDIT_DATA_##_t; (_d)->function = __func__; } |
| 108 | |
| 109 | void common_lsm_audit(struct common_audit_data *a); |
| 110 | |
| 111 | #endif |