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_ */ 163 164