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