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/dcache.h> 12 #include <linux/magic.h> 13 #include <linux/types.h> 14 #include "flask.h" 15 16 #define SECSID_NULL 0x00000000 /* unspecified SID */ 17 #define SECSID_WILD 0xffffffff /* wildcard SID */ 18 #define SECCLASS_NULL 0x0000 /* no class */ 19 20 /* Identify specific policy version changes */ 21 #define POLICYDB_VERSION_BASE 15 22 #define POLICYDB_VERSION_BOOL 16 23 #define POLICYDB_VERSION_IPV6 17 24 #define POLICYDB_VERSION_NLCLASS 18 25 #define POLICYDB_VERSION_VALIDATETRANS 19 26 #define POLICYDB_VERSION_MLS 19 27 #define POLICYDB_VERSION_AVTAB 20 28 #define POLICYDB_VERSION_RANGETRANS 21 29 #define POLICYDB_VERSION_POLCAP 22 30 #define POLICYDB_VERSION_PERMISSIVE 23 31 #define POLICYDB_VERSION_BOUNDARY 24 32 #define POLICYDB_VERSION_FILENAME_TRANS 25 33 #define POLICYDB_VERSION_ROLETRANS 26 34 35 /* Range of policy versions we understand*/ 36 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 37 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 38 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 39 #else 40 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_ROLETRANS 41 #endif 42 43 /* Mask for just the mount related flags */ 44 #define SE_MNTMASK 0x0f 45 /* Super block security struct flags for mount options */ 46 #define CONTEXT_MNT 0x01 47 #define FSCONTEXT_MNT 0x02 48 #define ROOTCONTEXT_MNT 0x04 49 #define DEFCONTEXT_MNT 0x08 50 /* Non-mount related flags */ 51 #define SE_SBINITIALIZED 0x10 52 #define SE_SBPROC 0x20 53 #define SE_SBLABELSUPP 0x40 54 55 #define CONTEXT_STR "context=" 56 #define FSCONTEXT_STR "fscontext=" 57 #define ROOTCONTEXT_STR "rootcontext=" 58 #define DEFCONTEXT_STR "defcontext=" 59 #define LABELSUPP_STR "seclabel" 60 61 struct netlbl_lsm_secattr; 62 63 extern int selinux_enabled; 64 65 /* Policy capabilities */ 66 enum { 67 POLICYDB_CAPABILITY_NETPEER, 68 POLICYDB_CAPABILITY_OPENPERM, 69 __POLICYDB_CAPABILITY_MAX 70 }; 71 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 72 73 extern int selinux_policycap_netpeer; 74 extern int selinux_policycap_openperm; 75 76 /* 77 * type_datum properties 78 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 79 */ 80 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 81 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 82 83 /* limitation of boundary depth */ 84 #define POLICYDB_BOUNDS_MAXDEPTH 4 85 86 int security_mls_enabled(void); 87 88 int security_load_policy(void *data, size_t len); 89 int security_read_policy(void **data, size_t *len); 90 size_t security_policydb_len(void); 91 92 int security_policycap_supported(unsigned int req_cap); 93 94 #define SEL_VEC_MAX 32 95 struct av_decision { 96 u32 allowed; 97 u32 auditallow; 98 u32 auditdeny; 99 u32 seqno; 100 u32 flags; 101 }; 102 103 /* definitions of av_decision.flags */ 104 #define AVD_FLAGS_PERMISSIVE 0x0001 105 106 void security_compute_av(u32 ssid, u32 tsid, 107 u16 tclass, struct av_decision *avd); 108 109 void security_compute_av_user(u32 ssid, u32 tsid, 110 u16 tclass, struct av_decision *avd); 111 112 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 113 const struct qstr *qstr, u32 *out_sid); 114 115 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 116 const char *objname, u32 *out_sid); 117 118 int security_member_sid(u32 ssid, u32 tsid, 119 u16 tclass, u32 *out_sid); 120 121 int security_change_sid(u32 ssid, u32 tsid, 122 u16 tclass, u32 *out_sid); 123 124 int security_sid_to_context(u32 sid, char **scontext, 125 u32 *scontext_len); 126 127 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 128 129 int security_context_to_sid(const char *scontext, u32 scontext_len, 130 u32 *out_sid); 131 132 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 133 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 134 135 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 136 u32 *sid); 137 138 int security_get_user_sids(u32 callsid, char *username, 139 u32 **sids, u32 *nel); 140 141 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 142 143 int security_netif_sid(char *name, u32 *if_sid); 144 145 int security_node_sid(u16 domain, void *addr, u32 addrlen, 146 u32 *out_sid); 147 148 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 149 u16 tclass); 150 151 int security_bounded_transition(u32 oldsid, u32 newsid); 152 153 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 154 155 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 156 u32 xfrm_sid, 157 u32 *peer_sid); 158 159 int security_get_classes(char ***classes, int *nclasses); 160 int security_get_permissions(char *class, char ***perms, int *nperms); 161 int security_get_reject_unknown(void); 162 int security_get_allow_unknown(void); 163 164 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 165 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 166 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 167 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 168 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 169 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 170 171 int security_fs_use(const char *fstype, unsigned int *behavior, 172 u32 *sid); 173 174 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 175 u32 *sid); 176 177 #ifdef CONFIG_NETLABEL 178 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 179 u32 *sid); 180 181 int security_netlbl_sid_to_secattr(u32 sid, 182 struct netlbl_lsm_secattr *secattr); 183 #else 184 static inline int security_netlbl_secattr_to_sid( 185 struct netlbl_lsm_secattr *secattr, 186 u32 *sid) 187 { 188 return -EIDRM; 189 } 190 191 static inline int security_netlbl_sid_to_secattr(u32 sid, 192 struct netlbl_lsm_secattr *secattr) 193 { 194 return -ENOENT; 195 } 196 #endif /* CONFIG_NETLABEL */ 197 198 const char *security_get_initial_sid_context(u32 sid); 199 200 /* 201 * status notifier using mmap interface 202 */ 203 extern struct page *selinux_kernel_status_page(void); 204 205 #define SELINUX_KERNEL_STATUS_VERSION 1 206 struct selinux_kernel_status { 207 u32 version; /* version number of thie structure */ 208 u32 sequence; /* sequence number of seqlock logic */ 209 u32 enforcing; /* current setting of enforcing mode */ 210 u32 policyload; /* times of policy reloaded */ 211 u32 deny_unknown; /* current setting of deny_unknown */ 212 /* 213 * The version > 0 supports above members. 214 */ 215 } __attribute__((packed)); 216 217 extern void selinux_status_update_setenforce(int enforcing); 218 extern void selinux_status_update_policyload(int seqno); 219 220 #endif /* _SELINUX_SECURITY_H_ */ 221 222