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 <linux/magic.h> 12 #include "flask.h" 13 14 #define SECSID_NULL 0x00000000 /* unspecified SID */ 15 #define SECSID_WILD 0xffffffff /* wildcard SID */ 16 #define SECCLASS_NULL 0x0000 /* no class */ 17 18 /* Identify specific policy version changes */ 19 #define POLICYDB_VERSION_BASE 15 20 #define POLICYDB_VERSION_BOOL 16 21 #define POLICYDB_VERSION_IPV6 17 22 #define POLICYDB_VERSION_NLCLASS 18 23 #define POLICYDB_VERSION_VALIDATETRANS 19 24 #define POLICYDB_VERSION_MLS 19 25 #define POLICYDB_VERSION_AVTAB 20 26 #define POLICYDB_VERSION_RANGETRANS 21 27 #define POLICYDB_VERSION_POLCAP 22 28 #define POLICYDB_VERSION_PERMISSIVE 23 29 #define POLICYDB_VERSION_BOUNDARY 24 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_BOUNDARY 37 #endif 38 39 /* Mask for just the mount related flags */ 40 #define SE_MNTMASK 0x0f 41 /* Super block security struct flags for mount options */ 42 #define CONTEXT_MNT 0x01 43 #define FSCONTEXT_MNT 0x02 44 #define ROOTCONTEXT_MNT 0x04 45 #define DEFCONTEXT_MNT 0x08 46 /* Non-mount related flags */ 47 #define SE_SBINITIALIZED 0x10 48 #define SE_SBPROC 0x20 49 #define SE_SBLABELSUPP 0x40 50 51 #define CONTEXT_STR "context=" 52 #define FSCONTEXT_STR "fscontext=" 53 #define ROOTCONTEXT_STR "rootcontext=" 54 #define DEFCONTEXT_STR "defcontext=" 55 #define LABELSUPP_STR "seclabel" 56 57 struct netlbl_lsm_secattr; 58 59 extern int selinux_enabled; 60 61 /* Policy capabilities */ 62 enum { 63 POLICYDB_CAPABILITY_NETPEER, 64 POLICYDB_CAPABILITY_OPENPERM, 65 __POLICYDB_CAPABILITY_MAX 66 }; 67 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 68 69 extern int selinux_policycap_netpeer; 70 extern int selinux_policycap_openperm; 71 72 /* 73 * type_datum properties 74 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 75 */ 76 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 77 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 78 79 /* limitation of boundary depth */ 80 #define POLICYDB_BOUNDS_MAXDEPTH 4 81 82 int security_mls_enabled(void); 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 u32 flags; 95 }; 96 97 /* definitions of av_decision.flags */ 98 #define AVD_FLAGS_PERMISSIVE 0x0001 99 100 void security_compute_av(u32 ssid, u32 tsid, 101 u16 tclass, struct av_decision *avd); 102 103 void security_compute_av_user(u32 ssid, u32 tsid, 104 u16 tclass, struct av_decision *avd); 105 106 int security_transition_sid(u32 ssid, u32 tsid, 107 u16 tclass, u32 *out_sid); 108 109 int security_transition_sid_user(u32 ssid, u32 tsid, 110 u16 tclass, u32 *out_sid); 111 112 int security_member_sid(u32 ssid, u32 tsid, 113 u16 tclass, u32 *out_sid); 114 115 int security_change_sid(u32 ssid, u32 tsid, 116 u16 tclass, u32 *out_sid); 117 118 int security_sid_to_context(u32 sid, char **scontext, 119 u32 *scontext_len); 120 121 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 122 123 int security_context_to_sid(const char *scontext, u32 scontext_len, 124 u32 *out_sid); 125 126 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 127 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 128 129 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 130 u32 *sid); 131 132 int security_get_user_sids(u32 callsid, char *username, 133 u32 **sids, u32 *nel); 134 135 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 136 137 int security_netif_sid(char *name, u32 *if_sid); 138 139 int security_node_sid(u16 domain, void *addr, u32 addrlen, 140 u32 *out_sid); 141 142 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 143 u16 tclass); 144 145 int security_bounded_transition(u32 oldsid, u32 newsid); 146 147 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 148 149 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 150 u32 xfrm_sid, 151 u32 *peer_sid); 152 153 int security_get_classes(char ***classes, int *nclasses); 154 int security_get_permissions(char *class, char ***perms, int *nperms); 155 int security_get_reject_unknown(void); 156 int security_get_allow_unknown(void); 157 158 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 159 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 160 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 161 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 162 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 163 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 164 165 int security_fs_use(const char *fstype, unsigned int *behavior, 166 u32 *sid); 167 168 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 169 u32 *sid); 170 171 #ifdef CONFIG_NETLABEL 172 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 173 u32 *sid); 174 175 int security_netlbl_sid_to_secattr(u32 sid, 176 struct netlbl_lsm_secattr *secattr); 177 #else 178 static inline int security_netlbl_secattr_to_sid( 179 struct netlbl_lsm_secattr *secattr, 180 u32 *sid) 181 { 182 return -EIDRM; 183 } 184 185 static inline int security_netlbl_sid_to_secattr(u32 sid, 186 struct netlbl_lsm_secattr *secattr) 187 { 188 return -ENOENT; 189 } 190 #endif /* CONFIG_NETLABEL */ 191 192 const char *security_get_initial_sid_context(u32 sid); 193 194 #endif /* _SELINUX_SECURITY_H_ */ 195 196