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 /* Mask for just the mount related flags */ 41 #define SE_MNTMASK 0x0f 42 /* Super block security struct flags for mount options */ 43 #define CONTEXT_MNT 0x01 44 #define FSCONTEXT_MNT 0x02 45 #define ROOTCONTEXT_MNT 0x04 46 #define DEFCONTEXT_MNT 0x08 47 /* Non-mount related flags */ 48 #define SE_SBINITIALIZED 0x10 49 #define SE_SBPROC 0x20 50 #define SE_SBLABELSUPP 0x40 51 52 #define CONTEXT_STR "context=" 53 #define FSCONTEXT_STR "fscontext=" 54 #define ROOTCONTEXT_STR "rootcontext=" 55 #define DEFCONTEXT_STR "defcontext=" 56 #define LABELSUPP_STR "seclabel" 57 58 struct netlbl_lsm_secattr; 59 60 extern int selinux_enabled; 61 extern int selinux_mls_enabled; 62 63 /* Policy capabilities */ 64 enum { 65 POLICYDB_CAPABILITY_NETPEER, 66 POLICYDB_CAPABILITY_OPENPERM, 67 __POLICYDB_CAPABILITY_MAX 68 }; 69 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 70 71 extern int selinux_policycap_netpeer; 72 extern int selinux_policycap_openperm; 73 74 /* 75 * type_datum properties 76 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 77 */ 78 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 79 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 80 81 /* limitation of boundary depth */ 82 #define POLICYDB_BOUNDS_MAXDEPTH 4 83 84 int security_load_policy(void *data, size_t len); 85 86 int security_policycap_supported(unsigned int req_cap); 87 88 #define SEL_VEC_MAX 32 89 struct av_decision { 90 u32 allowed; 91 u32 auditallow; 92 u32 auditdeny; 93 u32 seqno; 94 }; 95 96 int security_permissive_sid(u32 sid); 97 98 int security_compute_av(u32 ssid, u32 tsid, 99 u16 tclass, u32 requested, 100 struct av_decision *avd); 101 102 int security_transition_sid(u32 ssid, u32 tsid, 103 u16 tclass, u32 *out_sid); 104 105 int security_member_sid(u32 ssid, u32 tsid, 106 u16 tclass, u32 *out_sid); 107 108 int security_change_sid(u32 ssid, u32 tsid, 109 u16 tclass, u32 *out_sid); 110 111 int security_sid_to_context(u32 sid, char **scontext, 112 u32 *scontext_len); 113 114 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 115 116 int security_context_to_sid(const char *scontext, u32 scontext_len, 117 u32 *out_sid); 118 119 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 120 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 121 122 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 123 u32 *sid); 124 125 int security_get_user_sids(u32 callsid, char *username, 126 u32 **sids, u32 *nel); 127 128 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 129 130 int security_netif_sid(char *name, u32 *if_sid); 131 132 int security_node_sid(u16 domain, void *addr, u32 addrlen, 133 u32 *out_sid); 134 135 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 136 u16 tclass); 137 138 int security_bounded_transition(u32 oldsid, u32 newsid); 139 140 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 141 142 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 143 u32 xfrm_sid, 144 u32 *peer_sid); 145 146 int security_get_classes(char ***classes, int *nclasses); 147 int security_get_permissions(char *class, char ***perms, int *nperms); 148 int security_get_reject_unknown(void); 149 int security_get_allow_unknown(void); 150 151 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 152 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 153 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 154 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 155 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 156 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 157 158 int security_fs_use(const char *fstype, unsigned int *behavior, 159 u32 *sid); 160 161 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 162 u32 *sid); 163 164 #ifdef CONFIG_NETLABEL 165 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 166 u32 *sid); 167 168 int security_netlbl_sid_to_secattr(u32 sid, 169 struct netlbl_lsm_secattr *secattr); 170 #else 171 static inline int security_netlbl_secattr_to_sid( 172 struct netlbl_lsm_secattr *secattr, 173 u32 *sid) 174 { 175 return -EIDRM; 176 } 177 178 static inline int security_netlbl_sid_to_secattr(u32 sid, 179 struct netlbl_lsm_secattr *secattr) 180 { 181 return -ENOENT; 182 } 183 #endif /* CONFIG_NETLABEL */ 184 185 const char *security_get_initial_sid_context(u32 sid); 186 187 #endif /* _SELINUX_SECURITY_H_ */ 188 189