security/selinux/include/security.h

   1 /*
   2  * Security server interface.
   3  *
   4  * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
   5  *
   6  */
   7
   8 #ifndef _SELINUX_SECURITY_H_
   9 #define _SELINUX_SECURITY_H_
  10
  11 #include <linux/skbuff.h>
  12 #include "flask.h"
  13
  14 #define SECSID_NULL                     0x00000000 /* unspecified SID */
  15 #define SECSID_WILD                     0xffffffff /* wildcard SID */
  16 #define SECCLASS_NULL                   0x0000 /* no class */
  17
  18 #define SELINUX_MAGIC 0xf97cff8c
  19
  20 /* Identify specific policy version changes */
  21 #define POLICYDB_VERSION_BASE           15
  22 #define POLICYDB_VERSION_BOOL           16
  23 #define POLICYDB_VERSION_IPV6           17
  24 #define POLICYDB_VERSION_NLCLASS        18
  25 #define POLICYDB_VERSION_VALIDATETRANS  19
  26 #define POLICYDB_VERSION_MLS            19
  27 #define POLICYDB_VERSION_AVTAB          20
  28 #define POLICYDB_VERSION_RANGETRANS     21
  29
  30 /* Range of policy versions we understand*/
  31 #define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
  32 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
  33 #define POLICYDB_VERSION_MAX    CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
  34 #else
  35 #define POLICYDB_VERSION_MAX    POLICYDB_VERSION_RANGETRANS
  36 #endif
  37
  38 extern int selinux_enabled;
  39 extern int selinux_mls_enabled;
  40
  41 int security_load_policy(void * data, size_t len);
  42
  43 struct av_decision {
  44         u32 allowed;
  45         u32 decided;
  46         u32 auditallow;
  47         u32 auditdeny;
  48         u32 seqno;
  49 };
  50
  51 int security_compute_av(u32 ssid, u32 tsid,
  52         u16 tclass, u32 requested,
  53         struct av_decision *avd);
  54
  55 int security_transition_sid(u32 ssid, u32 tsid,
  56         u16 tclass, u32 *out_sid);
  57
  58 int security_member_sid(u32 ssid, u32 tsid,
  59         u16 tclass, u32 *out_sid);
  60
  61 int security_change_sid(u32 ssid, u32 tsid,
  62         u16 tclass, u32 *out_sid);
  63
  64 int security_sid_to_context(u32 sid, char **scontext,
  65         u32 *scontext_len);
  66
  67 int security_context_to_sid(char *scontext, u32 scontext_len,
  68         u32 *out_sid);
  69
  70 int security_context_to_sid_default(char *scontext, u32 scontext_len, u32 *out_sid, u32 def_sid);
  71
  72 int security_get_user_sids(u32 callsid, char *username,
  73                            u32 **sids, u32 *nel);
  74
  75 int security_port_sid(u16 domain, u16 type, u8 protocol, u16 port,
  76         u32 *out_sid);
  77
  78 int security_netif_sid(char *name, u32 *if_sid,
  79         u32 *msg_sid);
  80
  81 int security_node_sid(u16 domain, void *addr, u32 addrlen,
  82         u32 *out_sid);
  83
  84 void security_skb_extlbl_sid(struct sk_buff *skb, u32 base_sid, u32 *sid);
  85
  86 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
  87                                  u16 tclass);
  88
  89 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
  90
  91 #define SECURITY_FS_USE_XATTR           1 /* use xattr */
  92 #define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
  93 #define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
  94 #define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
  95 #define SECURITY_FS_USE_NONE            5 /* no labeling support */
  96 #define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
  97
  98 int security_fs_use(const char *fstype, unsigned int *behavior,
  99         u32 *sid);
 100
 101 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 102         u32 *sid);
 103
 104 #endif /* _SELINUX_SECURITY_H_ */
 105