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 "flask.h"
  12
  13 #define SECSID_NULL                     0x00000000 /* unspecified SID */
  14 #define SECSID_WILD                     0xffffffff /* wildcard SID */
  15 #define SECCLASS_NULL                   0x0000 /* no class */
  16
  17 #define SELINUX_MAGIC 0xf97cff8c
  18
  19 /* Identify specific policy version changes */
  20 #define POLICYDB_VERSION_BASE           15
  21 #define POLICYDB_VERSION_BOOL           16
  22 #define POLICYDB_VERSION_IPV6           17
  23 #define POLICYDB_VERSION_NLCLASS        18
  24 #define POLICYDB_VERSION_VALIDATETRANS  19
  25 #define POLICYDB_VERSION_MLS            19
  26 #define POLICYDB_VERSION_AVTAB          20
  27 #define POLICYDB_VERSION_RANGETRANS     21
  28 #define POLICYDB_VERSION_POLCAP         22
  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_POLCAP
  36 #endif
  37
  38 #define CONTEXT_MNT     0x01
  39 #define FSCONTEXT_MNT   0x02
  40 #define ROOTCONTEXT_MNT 0x04
  41 #define DEFCONTEXT_MNT  0x08
  42
  43 struct netlbl_lsm_secattr;
  44
  45 extern int selinux_enabled;
  46 extern int selinux_mls_enabled;
  47
  48 /* Policy capabilities */
  49 enum {
  50         POLICYDB_CAPABILITY_NETPEER,
  51         POLICYDB_CAPABILITY_OPENPERM,
  52         __POLICYDB_CAPABILITY_MAX
  53 };
  54 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  55
  56 extern int selinux_policycap_netpeer;
  57 extern int selinux_policycap_openperm;
  58
  59 int security_load_policy(void * data, size_t len);
  60
  61 int security_policycap_supported(unsigned int req_cap);
  62
  63 #define SEL_VEC_MAX 32
  64 struct av_decision {
  65         u32 allowed;
  66         u32 decided;
  67         u32 auditallow;
  68         u32 auditdeny;
  69         u32 seqno;
  70 };
  71
  72 int security_compute_av(u32 ssid, u32 tsid,
  73         u16 tclass, u32 requested,
  74         struct av_decision *avd);
  75
  76 int security_transition_sid(u32 ssid, u32 tsid,
  77         u16 tclass, u32 *out_sid);
  78
  79 int security_member_sid(u32 ssid, u32 tsid,
  80         u16 tclass, u32 *out_sid);
  81
  82 int security_change_sid(u32 ssid, u32 tsid,
  83         u16 tclass, u32 *out_sid);
  84
  85 int security_sid_to_context(u32 sid, char **scontext,
  86         u32 *scontext_len);
  87
  88 int security_context_to_sid(char *scontext, u32 scontext_len,
  89         u32 *out_sid);
  90
  91 int security_context_to_sid_default(char *scontext, u32 scontext_len,
  92                                     u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
  93
  94 int security_get_user_sids(u32 callsid, char *username,
  95                            u32 **sids, u32 *nel);
  96
  97 int security_port_sid(u16 domain, u16 type, u8 protocol, u16 port,
  98         u32 *out_sid);
  99
 100 int security_netif_sid(char *name, u32 *if_sid);
 101
 102 int security_node_sid(u16 domain, void *addr, u32 addrlen,
 103         u32 *out_sid);
 104
 105 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 106                                  u16 tclass);
 107
 108 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 109
 110 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 111                                  u32 xfrm_sid,
 112                                  u32 *peer_sid);
 113
 114 int security_get_classes(char ***classes, int *nclasses);
 115 int security_get_permissions(char *class, char ***perms, int *nperms);
 116 int security_get_reject_unknown(void);
 117 int security_get_allow_unknown(void);
 118
 119 #define SECURITY_FS_USE_XATTR           1 /* use xattr */
 120 #define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
 121 #define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
 122 #define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 123 #define SECURITY_FS_USE_NONE            5 /* no labeling support */
 124 #define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 125
 126 int security_fs_use(const char *fstype, unsigned int *behavior,
 127         u32 *sid);
 128
 129 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 130         u32 *sid);
 131
 132 #ifdef CONFIG_NETLABEL
 133 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 134                                    u32 *sid);
 135
 136 int security_netlbl_sid_to_secattr(u32 sid,
 137                                    struct netlbl_lsm_secattr *secattr);
 138 #else
 139 static inline int security_netlbl_secattr_to_sid(
 140                                             struct netlbl_lsm_secattr *secattr,
 141                                             u32 *sid)
 142 {
 143         return -EIDRM;
 144 }
 145
 146 static inline int security_netlbl_sid_to_secattr(u32 sid,
 147                                            struct netlbl_lsm_secattr *secattr)
 148 {
 149         return -ENOENT;
 150 }
 151 #endif /* CONFIG_NETLABEL */
 152
 153 const char *security_get_initial_sid_context(u32 sid);
 154
 155 #endif /* _SELINUX_SECURITY_H_ */
 156