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 #define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27 35 #define POLICYDB_VERSION_DEFAULT_TYPE 28 36 37 /* Range of policy versions we understand*/ 38 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 39 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 40 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 41 #else 42 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_DEFAULT_TYPE 43 #endif 44 45 /* Mask for just the mount related flags */ 46 #define SE_MNTMASK 0x0f 47 /* Super block security struct flags for mount options */ 48 #define CONTEXT_MNT 0x01 49 #define FSCONTEXT_MNT 0x02 50 #define ROOTCONTEXT_MNT 0x04 51 #define DEFCONTEXT_MNT 0x08 52 /* Non-mount related flags */ 53 #define SE_SBINITIALIZED 0x10 54 #define SE_SBPROC 0x20 55 #define SE_SBLABELSUPP 0x40 56 57 #define CONTEXT_STR "context=" 58 #define FSCONTEXT_STR "fscontext=" 59 #define ROOTCONTEXT_STR "rootcontext=" 60 #define DEFCONTEXT_STR "defcontext=" 61 #define LABELSUPP_STR "seclabel" 62 63 struct netlbl_lsm_secattr; 64 65 extern int selinux_enabled; 66 67 /* Policy capabilities */ 68 enum { 69 POLICYDB_CAPABILITY_NETPEER, 70 POLICYDB_CAPABILITY_OPENPERM, 71 __POLICYDB_CAPABILITY_MAX 72 }; 73 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 74 75 extern int selinux_policycap_netpeer; 76 extern int selinux_policycap_openperm; 77 78 /* 79 * type_datum properties 80 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 81 */ 82 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 83 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 84 85 /* limitation of boundary depth */ 86 #define POLICYDB_BOUNDS_MAXDEPTH 4 87 88 int security_mls_enabled(void); 89 90 int security_load_policy(void *data, size_t len); 91 int security_read_policy(void **data, size_t *len); 92 size_t security_policydb_len(void); 93 94 int security_policycap_supported(unsigned int req_cap); 95 96 #define SEL_VEC_MAX 32 97 struct av_decision { 98 u32 allowed; 99 u32 auditallow; 100 u32 auditdeny; 101 u32 seqno; 102 u32 flags; 103 }; 104 105 /* definitions of av_decision.flags */ 106 #define AVD_FLAGS_PERMISSIVE 0x0001 107 108 void security_compute_av(u32 ssid, u32 tsid, 109 u16 tclass, struct av_decision *avd); 110 111 void security_compute_av_user(u32 ssid, u32 tsid, 112 u16 tclass, struct av_decision *avd); 113 114 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 115 const struct qstr *qstr, u32 *out_sid); 116 117 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 118 const char *objname, u32 *out_sid); 119 120 int security_member_sid(u32 ssid, u32 tsid, 121 u16 tclass, u32 *out_sid); 122 123 int security_change_sid(u32 ssid, u32 tsid, 124 u16 tclass, u32 *out_sid); 125 126 int security_sid_to_context(u32 sid, char **scontext, 127 u32 *scontext_len); 128 129 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 130 131 int security_context_to_sid(const char *scontext, u32 scontext_len, 132 u32 *out_sid); 133 134 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 135 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 136 137 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 138 u32 *sid); 139 140 int security_get_user_sids(u32 callsid, char *username, 141 u32 **sids, u32 *nel); 142 143 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 144 145 int security_netif_sid(char *name, u32 *if_sid); 146 147 int security_node_sid(u16 domain, void *addr, u32 addrlen, 148 u32 *out_sid); 149 150 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 151 u16 tclass); 152 153 int security_bounded_transition(u32 oldsid, u32 newsid); 154 155 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 156 157 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 158 u32 xfrm_sid, 159 u32 *peer_sid); 160 161 int security_get_classes(char ***classes, int *nclasses); 162 int security_get_permissions(char *class, char ***perms, int *nperms); 163 int security_get_reject_unknown(void); 164 int security_get_allow_unknown(void); 165 166 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 167 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 168 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 169 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 170 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 171 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 172 173 int security_fs_use(const char *fstype, unsigned int *behavior, 174 u32 *sid); 175 176 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 177 u32 *sid); 178 179 #ifdef CONFIG_NETLABEL 180 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 181 u32 *sid); 182 183 int security_netlbl_sid_to_secattr(u32 sid, 184 struct netlbl_lsm_secattr *secattr); 185 #else 186 static inline int security_netlbl_secattr_to_sid( 187 struct netlbl_lsm_secattr *secattr, 188 u32 *sid) 189 { 190 return -EIDRM; 191 } 192 193 static inline int security_netlbl_sid_to_secattr(u32 sid, 194 struct netlbl_lsm_secattr *secattr) 195 { 196 return -ENOENT; 197 } 198 #endif /* CONFIG_NETLABEL */ 199 200 const char *security_get_initial_sid_context(u32 sid); 201 202 /* 203 * status notifier using mmap interface 204 */ 205 extern struct page *selinux_kernel_status_page(void); 206 207 #define SELINUX_KERNEL_STATUS_VERSION 1 208 struct selinux_kernel_status { 209 u32 version; /* version number of thie structure */ 210 u32 sequence; /* sequence number of seqlock logic */ 211 u32 enforcing; /* current setting of enforcing mode */ 212 u32 policyload; /* times of policy reloaded */ 213 u32 deny_unknown; /* current setting of deny_unknown */ 214 /* 215 * The version > 0 supports above members. 216 */ 217 } __attribute__((packed)); 218 219 extern void selinux_status_update_setenforce(int enforcing); 220 extern void selinux_status_update_policyload(int seqno); 221 extern void selinux_complete_init(void); 222 extern int selinux_disable(void); 223 extern void exit_sel_fs(void); 224 extern struct path selinux_null; 225 extern struct vfsmount *selinuxfs_mount; 226 extern void selnl_notify_setenforce(int val); 227 extern void selnl_notify_policyload(u32 seqno); 228 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 229 230 #endif /* _SELINUX_SECURITY_H_ */ 231 232