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 #define POLICYDB_VERSION_BOUNDARY 24 31 32 /* Range of policy versions we understand*/ 33 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 34 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 35 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 36 #else 37 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_BOUNDARY 38 #endif 39 40 #define CONTEXT_MNT 0x01 41 #define FSCONTEXT_MNT 0x02 42 #define ROOTCONTEXT_MNT 0x04 43 #define DEFCONTEXT_MNT 0x08 44 45 #define CONTEXT_STR "context=" 46 #define FSCONTEXT_STR "fscontext=" 47 #define ROOTCONTEXT_STR "rootcontext=" 48 #define DEFCONTEXT_STR "defcontext=" 49 50 struct netlbl_lsm_secattr; 51 52 extern int selinux_enabled; 53 extern int selinux_mls_enabled; 54 55 /* Policy capabilities */ 56 enum { 57 POLICYDB_CAPABILITY_NETPEER, 58 POLICYDB_CAPABILITY_OPENPERM, 59 __POLICYDB_CAPABILITY_MAX 60 }; 61 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 62 63 extern int selinux_policycap_netpeer; 64 extern int selinux_policycap_openperm; 65 66 /* 67 * type_datum properties 68 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 69 */ 70 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 71 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 72 73 /* limitation of boundary depth */ 74 #define POLICYDB_BOUNDS_MAXDEPTH 4 75 76 int security_load_policy(void *data, size_t len); 77 78 int security_policycap_supported(unsigned int req_cap); 79 80 #define SEL_VEC_MAX 32 81 struct av_decision { 82 u32 allowed; 83 u32 decided; 84 u32 auditallow; 85 u32 auditdeny; 86 u32 seqno; 87 }; 88 89 int security_permissive_sid(u32 sid); 90 91 int security_compute_av(u32 ssid, u32 tsid, 92 u16 tclass, u32 requested, 93 struct av_decision *avd); 94 95 int security_transition_sid(u32 ssid, u32 tsid, 96 u16 tclass, u32 *out_sid); 97 98 int security_member_sid(u32 ssid, u32 tsid, 99 u16 tclass, u32 *out_sid); 100 101 int security_change_sid(u32 ssid, u32 tsid, 102 u16 tclass, u32 *out_sid); 103 104 int security_sid_to_context(u32 sid, char **scontext, 105 u32 *scontext_len); 106 107 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 108 109 int security_context_to_sid(const char *scontext, u32 scontext_len, 110 u32 *out_sid); 111 112 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 113 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 114 115 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 116 u32 *sid); 117 118 int security_get_user_sids(u32 callsid, char *username, 119 u32 **sids, u32 *nel); 120 121 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 122 123 int security_netif_sid(char *name, u32 *if_sid); 124 125 int security_node_sid(u16 domain, void *addr, u32 addrlen, 126 u32 *out_sid); 127 128 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 129 u16 tclass); 130 131 int security_bounded_transition(u32 oldsid, u32 newsid); 132 133 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 134 135 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 136 u32 xfrm_sid, 137 u32 *peer_sid); 138 139 int security_get_classes(char ***classes, int *nclasses); 140 int security_get_permissions(char *class, char ***perms, int *nperms); 141 int security_get_reject_unknown(void); 142 int security_get_allow_unknown(void); 143 144 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 145 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 146 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 147 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 148 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 149 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 150 151 int security_fs_use(const char *fstype, unsigned int *behavior, 152 u32 *sid); 153 154 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 155 u32 *sid); 156 157 #ifdef CONFIG_NETLABEL 158 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 159 u32 *sid); 160 161 int security_netlbl_sid_to_secattr(u32 sid, 162 struct netlbl_lsm_secattr *secattr); 163 #else 164 static inline int security_netlbl_secattr_to_sid( 165 struct netlbl_lsm_secattr *secattr, 166 u32 *sid) 167 { 168 return -EIDRM; 169 } 170 171 static inline int security_netlbl_sid_to_secattr(u32 sid, 172 struct netlbl_lsm_secattr *secattr) 173 { 174 return -ENOENT; 175 } 176 #endif /* CONFIG_NETLABEL */ 177 178 const char *security_get_initial_sid_context(u32 sid); 179 180 #endif /* _SELINUX_SECURITY_H_ */ 181 182