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_ */ 156 157