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 #define LSM_AUDIT_DATA_DENTRY   10
  40         struct task_struct *tsk;
  41         union   {
  42                 struct path path;
  43                 struct dentry *dentry;
  44                 struct inode *inode;
  45                 struct {
  46                         int netif;
  47                         struct sock *sk;
  48                         u16 family;
  49                         __be16 dport;
  50                         __be16 sport;
  51                         union {
  52                                 struct {
  53                                         __be32 daddr;
  54                                         __be32 saddr;
  55                                 } v4;
  56                                 struct {
  57                                         struct in6_addr daddr;
  58                                         struct in6_addr saddr;
  59                                 } v6;
  60                         } fam;
  61                 } net;
  62                 int cap;
  63                 int ipc_id;
  64                 struct task_struct *tsk;
  65 #ifdef CONFIG_KEYS
  66                 struct {
  67                         key_serial_t key;
  68                         char *key_desc;
  69                 } key_struct;
  70 #endif
  71                 char *kmod_name;
  72         } u;
  73         /* this union contains LSM specific data */
  74         union {
  75 #ifdef CONFIG_SECURITY_SMACK
  76                 /* SMACK data */
  77                 struct smack_audit_data {
  78                         const char *function;
  79                         char *subject;
  80                         char *object;
  81                         char *request;
  82                         int result;
  83                 } smack_audit_data;
  84 #endif
  85 #ifdef CONFIG_SECURITY_SELINUX
  86                 /* SELinux data */
  87                 struct {
  88                         u32 ssid;
  89                         u32 tsid;
  90                         u16 tclass;
  91                         u32 requested;
  92                         u32 audited;
  93                         u32 denied;
  94                         /*
  95                          * auditdeny is a bit tricky and unintuitive.  See the
  96                          * comments in avc.c for it's meaning and usage.
  97                          */
  98                         u32 auditdeny;
  99                         struct av_decision *avd;
 100                         int result;
 101                 } selinux_audit_data;
 102 #endif
 103 #ifdef CONFIG_SECURITY_APPARMOR
 104                 struct {
 105                         int error;
 106                         int op;
 107                         int type;
 108                         void *profile;
 109                         const char *name;
 110                         const char *info;
 111                         union {
 112                                 void *target;
 113                                 struct {
 114                                         long pos;
 115                                         void *target;
 116                                 } iface;
 117                                 struct {
 118                                         int rlim;
 119                                         unsigned long max;
 120                                 } rlim;
 121                                 struct {
 122                                         const char *target;
 123                                         u32 request;
 124                                         u32 denied;
 125                                         uid_t ouid;
 126                                 } fs;
 127                         };
 128                 } apparmor_audit_data;
 129 #endif
 130         };
 131         /* these callback will be implemented by a specific LSM */
 132         void (*lsm_pre_audit)(struct audit_buffer *, void *);
 133         void (*lsm_post_audit)(struct audit_buffer *, void *);
 134 };
 135
 136 #define v4info fam.v4
 137 #define v6info fam.v6
 138
 139 int ipv4_skb_to_auditdata(struct sk_buff *skb,
 140                 struct common_audit_data *ad, u8 *proto);
 141
 142 int ipv6_skb_to_auditdata(struct sk_buff *skb,
 143                 struct common_audit_data *ad, u8 *proto);
 144
 145 /* Initialize an LSM audit data structure. */
 146 #define COMMON_AUDIT_DATA_INIT(_d, _t) \
 147         { memset((_d), 0, sizeof(struct common_audit_data)); \
 148          (_d)->type = LSM_AUDIT_DATA_##_t; }
 149
 150 void common_lsm_audit(struct common_audit_data *a);
 151
 152 #endif