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 #define POLICYDB_VERSION_PERMISSIVE     23
  30
  31 /* Range of policy versions we understand*/
  32 #define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
  33 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
  34 #define POLICYDB_VERSION_MAX    CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
  35 #else
  36 #define POLICYDB_VERSION_MAX    POLICYDB_VERSION_PERMISSIVE
  37 #endif
  38
  39 #define CONTEXT_MNT     0x01
  40 #define FSCONTEXT_MNT   0x02
  41 #define ROOTCONTEXT_MNT 0x04
  42 #define DEFCONTEXT_MNT  0x08
  43
  44 #define CONTEXT_STR     "context="
  45 #define FSCONTEXT_STR   "fscontext="
  46 #define ROOTCONTEXT_STR "rootcontext="
  47 #define DEFCONTEXT_STR  "defcontext="
  48
  49 struct netlbl_lsm_secattr;
  50
  51 extern int selinux_enabled;
  52 extern int selinux_mls_enabled;
  53
  54 /* Policy capabilities */
  55 enum {
  56         POLICYDB_CAPABILITY_NETPEER,
  57         POLICYDB_CAPABILITY_OPENPERM,
  58         __POLICYDB_CAPABILITY_MAX
  59 };
  60 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  61
  62 extern int selinux_policycap_netpeer;
  63 extern int selinux_policycap_openperm;
  64
  65 int security_load_policy(void *data, size_t len);
  66
  67 int security_policycap_supported(unsigned int req_cap);
  68
  69 #define SEL_VEC_MAX 32
  70 struct av_decision {
  71         u32 allowed;
  72         u32 decided;
  73         u32 auditallow;
  74         u32 auditdeny;
  75         u32 seqno;
  76 };
  77
  78 int security_permissive_sid(u32 sid);
  79
  80 int security_compute_av(u32 ssid, u32 tsid,
  81         u16 tclass, u32 requested,
  82         struct av_decision *avd);
  83
  84 int security_transition_sid(u32 ssid, u32 tsid,
  85         u16 tclass, u32 *out_sid);
  86
  87 int security_member_sid(u32 ssid, u32 tsid,
  88         u16 tclass, u32 *out_sid);
  89
  90 int security_change_sid(u32 ssid, u32 tsid,
  91         u16 tclass, u32 *out_sid);
  92
  93 int security_sid_to_context(u32 sid, char **scontext,
  94         u32 *scontext_len);
  95
  96 int security_context_to_sid(const char *scontext, u32 scontext_len,
  97         u32 *out_sid);
  98
  99 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 100                                     u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 101
 102 int security_get_user_sids(u32 callsid, char *username,
 103                            u32 **sids, u32 *nel);
 104
 105 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
 106
 107 int security_netif_sid(char *name, u32 *if_sid);
 108
 109 int security_node_sid(u16 domain, void *addr, u32 addrlen,
 110         u32 *out_sid);
 111
 112 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 113                                  u16 tclass);
 114
 115 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 116
 117 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 118                                  u32 xfrm_sid,
 119                                  u32 *peer_sid);
 120
 121 int security_get_classes(char ***classes, int *nclasses);
 122 int security_get_permissions(char *class, char ***perms, int *nperms);
 123 int security_get_reject_unknown(void);
 124 int security_get_allow_unknown(void);
 125
 126 #define SECURITY_FS_USE_XATTR           1 /* use xattr */
 127 #define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
 128 #define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
 129 #define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 130 #define SECURITY_FS_USE_NONE            5 /* no labeling support */
 131 #define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 132
 133 int security_fs_use(const char *fstype, unsigned int *behavior,
 134         u32 *sid);
 135
 136 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 137         u32 *sid);
 138
 139 #ifdef CONFIG_NETLABEL
 140 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 141                                    u32 *sid);
 142
 143 int security_netlbl_sid_to_secattr(u32 sid,
 144                                    struct netlbl_lsm_secattr *secattr);
 145 #else
 146 static inline int security_netlbl_secattr_to_sid(
 147                                             struct netlbl_lsm_secattr *secattr,
 148                                             u32 *sid)
 149 {
 150         return -EIDRM;
 151 }
 152
 153 static inline int security_netlbl_sid_to_secattr(u32 sid,
 154                                            struct netlbl_lsm_secattr *secattr)
 155 {
 156         return -ENOENT;
 157 }
 158 #endif /* CONFIG_NETLABEL */
 159
 160 const char *security_get_initial_sid_context(u32 sid);
 161
 162 #endif /* _SELINUX_SECURITY_H_ */
 163