include/linux/lsm_audit.h

   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 #define LSM_AUDIT_DATA_NONE     7
  37 #define LSM_AUDIT_DATA_KMOD     8
  38         struct task_struct *tsk;
  39         union   {
  40                 struct {
  41                         struct path path;
  42                         struct inode *inode;
  43                 } fs;
  44                 struct {
  45                         int netif;
  46                         struct sock *sk;
  47                         u16 family;
  48                         __be16 dport;
  49                         __be16 sport;
  50                         union {
  51                                 struct {
  52                                         __be32 daddr;
  53                                         __be32 saddr;
  54                                 } v4;
  55                                 struct {
  56                                         struct in6_addr daddr;
  57                                         struct in6_addr saddr;
  58                                 } v6;
  59                         } fam;
  60                 } net;
  61                 int cap;
  62                 int ipc_id;
  63                 struct task_struct *tsk;
  64 #ifdef CONFIG_KEYS
  65                 struct {
  66                         key_serial_t key;
  67                         char *key_desc;
  68                 } key_struct;
  69 #endif
  70                 char *kmod_name;
  71         } u;
  72         /* this union contains LSM specific data */
  73         union {
  74 #ifdef CONFIG_SECURITY_SMACK
  75                 /* SMACK data */
  76                 struct smack_audit_data {
  77                         const char *function;
  78                         char *subject;
  79                         char *object;
  80                         char *request;
  81                         int result;
  82                 } smack_audit_data;
  83 #endif
  84 #ifdef CONFIG_SECURITY_SELINUX
  85                 /* SELinux data */
  86                 struct {
  87                         u32 ssid;
  88                         u32 tsid;
  89                         u16 tclass;
  90                         u32 requested;
  91                         u32 audited;
  92                         u32 denied;
  93                         /*
  94                          * auditdeny is a bit tricky and unintuitive.  See the
  95                          * comments in avc.c for it's meaning and usage.
  96                          */
  97                         u32 auditdeny;
  98                         struct av_decision *avd;
  99                         int result;
 100                 } selinux_audit_data;
 101 #endif
 102 #ifdef CONFIG_SECURITY_APPARMOR
 103                 struct {
 104                         int error;
 105                         int op;
 106                         int type;
 107                         void *profile;
 108                         const char *name;
 109                         const char *info;
 110                         union {
 111                                 void *target;
 112                                 struct {
 113                                         long pos;
 114                                         void *target;
 115                                 } iface;
 116                                 struct {
 117                                         int rlim;
 118                                         unsigned long max;
 119                                 } rlim;
 120                                 struct {
 121                                         const char *target;
 122                                         u32 request;
 123                                         u32 denied;
 124                                         uid_t ouid;
 125                                 } fs;
 126                         };
 127                 } apparmor_audit_data;
 128 #endif
 129         };
 130         /* these callback will be implemented by a specific LSM */
 131         void (*lsm_pre_audit)(struct audit_buffer *, void *);
 132         void (*lsm_post_audit)(struct audit_buffer *, void *);
 133 };
 134
 135 #define v4info fam.v4
 136 #define v6info fam.v6
 137
 138 int ipv4_skb_to_auditdata(struct sk_buff *skb,
 139                 struct common_audit_data *ad, u8 *proto);
 140
 141 int ipv6_skb_to_auditdata(struct sk_buff *skb,
 142                 struct common_audit_data *ad, u8 *proto);
 143
 144 /* Initialize an LSM audit data structure. */
 145 #define COMMON_AUDIT_DATA_INIT(_d, _t) \
 146         { memset((_d), 0, sizeof(struct common_audit_data)); \
 147          (_d)->type = LSM_AUDIT_DATA_##_t; }
 148
 149 void common_lsm_audit(struct common_audit_data *a);
 150
 151 #endif