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 <linux/types.h> 13 #include "flask.h" 14 15 #define SECSID_NULL 0x00000000 /* unspecified SID */ 16 #define SECSID_WILD 0xffffffff /* wildcard SID */ 17 #define SECCLASS_NULL 0x0000 /* no class */ 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 62 /* Policy capabilities */ 63 enum { 64 POLICYDB_CAPABILITY_NETPEER, 65 POLICYDB_CAPABILITY_OPENPERM, 66 __POLICYDB_CAPABILITY_MAX 67 }; 68 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 69 70 extern int selinux_policycap_netpeer; 71 extern int selinux_policycap_openperm; 72 73 /* 74 * type_datum properties 75 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 76 */ 77 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 78 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 79 80 /* limitation of boundary depth */ 81 #define POLICYDB_BOUNDS_MAXDEPTH 4 82 83 int security_mls_enabled(void); 84 85 int security_load_policy(void *data, size_t len); 86 int security_read_policy(void **data, ssize_t *len); 87 size_t security_policydb_len(void); 88 89 int security_policycap_supported(unsigned int req_cap); 90 91 #define SEL_VEC_MAX 32 92 struct av_decision { 93 u32 allowed; 94 u32 auditallow; 95 u32 auditdeny; 96 u32 seqno; 97 u32 flags; 98 }; 99 100 /* definitions of av_decision.flags */ 101 #define AVD_FLAGS_PERMISSIVE 0x0001 102 103 void security_compute_av(u32 ssid, u32 tsid, 104 u16 tclass, struct av_decision *avd); 105 106 void security_compute_av_user(u32 ssid, u32 tsid, 107 u16 tclass, struct av_decision *avd); 108 109 int security_transition_sid(u32 ssid, u32 tsid, 110 u16 tclass, u32 *out_sid); 111 112 int security_transition_sid_user(u32 ssid, u32 tsid, 113 u16 tclass, u32 *out_sid); 114 115 int security_member_sid(u32 ssid, u32 tsid, 116 u16 tclass, u32 *out_sid); 117 118 int security_change_sid(u32 ssid, u32 tsid, 119 u16 tclass, u32 *out_sid); 120 121 int security_sid_to_context(u32 sid, char **scontext, 122 u32 *scontext_len); 123 124 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 125 126 int security_context_to_sid(const char *scontext, u32 scontext_len, 127 u32 *out_sid); 128 129 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 130 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 131 132 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 133 u32 *sid); 134 135 int security_get_user_sids(u32 callsid, char *username, 136 u32 **sids, u32 *nel); 137 138 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 139 140 int security_netif_sid(char *name, u32 *if_sid); 141 142 int security_node_sid(u16 domain, void *addr, u32 addrlen, 143 u32 *out_sid); 144 145 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 146 u16 tclass); 147 148 int security_bounded_transition(u32 oldsid, u32 newsid); 149 150 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 151 152 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 153 u32 xfrm_sid, 154 u32 *peer_sid); 155 156 int security_get_classes(char ***classes, int *nclasses); 157 int security_get_permissions(char *class, char ***perms, int *nperms); 158 int security_get_reject_unknown(void); 159 int security_get_allow_unknown(void); 160 161 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 162 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 163 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 164 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 165 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 166 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 167 168 int security_fs_use(const char *fstype, unsigned int *behavior, 169 u32 *sid); 170 171 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 172 u32 *sid); 173 174 #ifdef CONFIG_NETLABEL 175 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 176 u32 *sid); 177 178 int security_netlbl_sid_to_secattr(u32 sid, 179 struct netlbl_lsm_secattr *secattr); 180 #else 181 static inline int security_netlbl_secattr_to_sid( 182 struct netlbl_lsm_secattr *secattr, 183 u32 *sid) 184 { 185 return -EIDRM; 186 } 187 188 static inline int security_netlbl_sid_to_secattr(u32 sid, 189 struct netlbl_lsm_secattr *secattr) 190 { 191 return -ENOENT; 192 } 193 #endif /* CONFIG_NETLABEL */ 194 195 const char *security_get_initial_sid_context(u32 sid); 196 197 /* 198 * status notifier using mmap interface 199 */ 200 extern struct page *selinux_kernel_status_page(void); 201 202 #define SELINUX_KERNEL_STATUS_VERSION 1 203 struct selinux_kernel_status { 204 u32 version; /* version number of thie structure */ 205 u32 sequence; /* sequence number of seqlock logic */ 206 u32 enforcing; /* current setting of enforcing mode */ 207 u32 policyload; /* times of policy reloaded */ 208 u32 deny_unknown; /* current setting of deny_unknown */ 209 /* 210 * The version > 0 supports above members. 211 */ 212 } __attribute__((packed)); 213 214 extern void selinux_status_update_setenforce(int enforcing); 215 extern void selinux_status_update_policyload(int seqno); 216 217 #endif /* _SELINUX_SECURITY_H_ */ 218 219