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_PATH     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 #define LSM_AUDIT_DATA_INODE    9
  39         struct task_struct *tsk;
  40         union   {
  41                 struct path path;
  42                 struct inode *inode;
  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                 char *kmod_name;
  70         } u;
  71         /* this union contains LSM specific data */
  72         union {
  73 #ifdef CONFIG_SECURITY_SMACK
  74                 /* SMACK data */
  75                 struct smack_audit_data {
  76                         const char *function;
  77                         char *subject;
  78                         char *object;
  79                         char *request;
  80                         int result;
  81                 } smack_audit_data;
  82 #endif
  83 #ifdef CONFIG_SECURITY_SELINUX
  84                 /* SELinux data */
  85                 struct {
  86                         u32 ssid;
  87                         u32 tsid;
  88                         u16 tclass;
  89                         u32 requested;
  90                         u32 audited;
  91                         u32 denied;
  92                         /*
  93                          * auditdeny is a bit tricky and unintuitive.  See the
  94                          * comments in avc.c for it's meaning and usage.
  95                          */
  96                         u32 auditdeny;
  97                         struct av_decision *avd;
  98                         int result;
  99                 } selinux_audit_data;
 100 #endif
 101 #ifdef CONFIG_SECURITY_APPARMOR
 102                 struct {
 103                         int error;
 104                         int op;
 105                         int type;
 106                         void *profile;
 107                         const char *name;
 108                         const char *info;
 109                         union {
 110                                 void *target;
 111                                 struct {
 112                                         long pos;
 113                                         void *target;
 114                                 } iface;
 115                                 struct {
 116                                         int rlim;
 117                                         unsigned long max;
 118                                 } rlim;
 119                                 struct {
 120                                         const char *target;
 121                                         u32 request;
 122                                         u32 denied;
 123                                         uid_t ouid;
 124                                 } fs;
 125                         };
 126                 } apparmor_audit_data;
 127 #endif
 128         };
 129         /* these callback will be implemented by a specific LSM */
 130         void (*lsm_pre_audit)(struct audit_buffer *, void *);
 131         void (*lsm_post_audit)(struct audit_buffer *, void *);
 132 };
 133
 134 #define v4info fam.v4
 135 #define v6info fam.v6
 136
 137 int ipv4_skb_to_auditdata(struct sk_buff *skb,
 138                 struct common_audit_data *ad, u8 *proto);
 139
 140 int ipv6_skb_to_auditdata(struct sk_buff *skb,
 141                 struct common_audit_data *ad, u8 *proto);
 142
 143 /* Initialize an LSM audit data structure. */
 144 #define COMMON_AUDIT_DATA_INIT(_d, _t) \
 145         { memset((_d), 0, sizeof(struct common_audit_data)); \
 146          (_d)->type = LSM_AUDIT_DATA_##_t; }
 147
 148 void common_lsm_audit(struct common_audit_data *a);
 149
 150 #endif