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/compiler.h> 12 #include <linux/dcache.h> 13 #include <linux/magic.h> 14 #include <linux/types.h> 15 #include "flask.h" 16 17 #define SECSID_NULL 0x00000000 /* unspecified SID */ 18 #define SECSID_WILD 0xffffffff /* wildcard SID */ 19 #define SECCLASS_NULL 0x0000 /* no class */ 20 21 /* Identify specific policy version changes */ 22 #define POLICYDB_VERSION_BASE 15 23 #define POLICYDB_VERSION_BOOL 16 24 #define POLICYDB_VERSION_IPV6 17 25 #define POLICYDB_VERSION_NLCLASS 18 26 #define POLICYDB_VERSION_VALIDATETRANS 19 27 #define POLICYDB_VERSION_MLS 19 28 #define POLICYDB_VERSION_AVTAB 20 29 #define POLICYDB_VERSION_RANGETRANS 21 30 #define POLICYDB_VERSION_POLCAP 22 31 #define POLICYDB_VERSION_PERMISSIVE 23 32 #define POLICYDB_VERSION_BOUNDARY 24 33 #define POLICYDB_VERSION_FILENAME_TRANS 25 34 #define POLICYDB_VERSION_ROLETRANS 26 35 #define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27 36 #define POLICYDB_VERSION_DEFAULT_TYPE 28 37 #define POLICYDB_VERSION_CONSTRAINT_NAMES 29 38 #define POLICYDB_VERSION_XPERMS_IOCTL 30 39 #define POLICYDB_VERSION_INFINIBAND 31 40 41 /* Range of policy versions we understand*/ 42 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 43 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_INFINIBAND 44 45 /* Mask for just the mount related flags */ 46 #define SE_MNTMASK 0x0f 47 /* Super block security struct flags for mount options */ 48 /* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */ 49 #define CONTEXT_MNT 0x01 50 #define FSCONTEXT_MNT 0x02 51 #define ROOTCONTEXT_MNT 0x04 52 #define DEFCONTEXT_MNT 0x08 53 #define SBLABEL_MNT 0x10 54 /* Non-mount related flags */ 55 #define SE_SBINITIALIZED 0x0100 56 #define SE_SBPROC 0x0200 57 #define SE_SBGENFS 0x0400 58 59 #define CONTEXT_STR "context=" 60 #define FSCONTEXT_STR "fscontext=" 61 #define ROOTCONTEXT_STR "rootcontext=" 62 #define DEFCONTEXT_STR "defcontext=" 63 #define LABELSUPP_STR "seclabel" 64 65 struct netlbl_lsm_secattr; 66 67 extern int selinux_enabled; 68 69 /* Policy capabilities */ 70 enum { 71 POLICYDB_CAPABILITY_NETPEER, 72 POLICYDB_CAPABILITY_OPENPERM, 73 POLICYDB_CAPABILITY_EXTSOCKCLASS, 74 POLICYDB_CAPABILITY_ALWAYSNETWORK, 75 POLICYDB_CAPABILITY_CGROUPSECLABEL, 76 __POLICYDB_CAPABILITY_MAX 77 }; 78 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 79 80 extern char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX]; 81 82 extern int selinux_policycap_netpeer; 83 extern int selinux_policycap_openperm; 84 extern int selinux_policycap_extsockclass; 85 extern int selinux_policycap_alwaysnetwork; 86 extern int selinux_policycap_cgroupseclabel; 87 88 /* 89 * type_datum properties 90 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 91 */ 92 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 93 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 94 95 /* limitation of boundary depth */ 96 #define POLICYDB_BOUNDS_MAXDEPTH 4 97 98 int security_mls_enabled(void); 99 100 int security_load_policy(void *data, size_t len); 101 int security_read_policy(void **data, size_t *len); 102 size_t security_policydb_len(void); 103 104 int security_policycap_supported(unsigned int req_cap); 105 106 #define SEL_VEC_MAX 32 107 struct av_decision { 108 u32 allowed; 109 u32 auditallow; 110 u32 auditdeny; 111 u32 seqno; 112 u32 flags; 113 }; 114 115 #define XPERMS_ALLOWED 1 116 #define XPERMS_AUDITALLOW 2 117 #define XPERMS_DONTAUDIT 4 118 119 #define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f)) 120 #define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f))) 121 struct extended_perms_data { 122 u32 p[8]; 123 }; 124 125 struct extended_perms_decision { 126 u8 used; 127 u8 driver; 128 struct extended_perms_data *allowed; 129 struct extended_perms_data *auditallow; 130 struct extended_perms_data *dontaudit; 131 }; 132 133 struct extended_perms { 134 u16 len; /* length associated decision chain */ 135 struct extended_perms_data drivers; /* flag drivers that are used */ 136 }; 137 138 /* definitions of av_decision.flags */ 139 #define AVD_FLAGS_PERMISSIVE 0x0001 140 141 void security_compute_av(u32 ssid, u32 tsid, 142 u16 tclass, struct av_decision *avd, 143 struct extended_perms *xperms); 144 145 void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass, 146 u8 driver, struct extended_perms_decision *xpermd); 147 148 void security_compute_av_user(u32 ssid, u32 tsid, 149 u16 tclass, struct av_decision *avd); 150 151 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 152 const struct qstr *qstr, u32 *out_sid); 153 154 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 155 const char *objname, u32 *out_sid); 156 157 int security_member_sid(u32 ssid, u32 tsid, 158 u16 tclass, u32 *out_sid); 159 160 int security_change_sid(u32 ssid, u32 tsid, 161 u16 tclass, u32 *out_sid); 162 163 int security_sid_to_context(u32 sid, char **scontext, 164 u32 *scontext_len); 165 166 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 167 168 int security_context_to_sid(const char *scontext, u32 scontext_len, 169 u32 *out_sid, gfp_t gfp); 170 171 int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp); 172 173 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 174 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 175 176 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 177 u32 *sid); 178 179 int security_get_user_sids(u32 callsid, char *username, 180 u32 **sids, u32 *nel); 181 182 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 183 184 int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid); 185 186 int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid); 187 188 int security_netif_sid(char *name, u32 *if_sid); 189 190 int security_node_sid(u16 domain, void *addr, u32 addrlen, 191 u32 *out_sid); 192 193 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 194 u16 tclass); 195 196 int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid, 197 u16 tclass); 198 199 int security_bounded_transition(u32 oldsid, u32 newsid); 200 201 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 202 203 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 204 u32 xfrm_sid, 205 u32 *peer_sid); 206 207 int security_get_classes(char ***classes, int *nclasses); 208 int security_get_permissions(char *class, char ***perms, int *nperms); 209 int security_get_reject_unknown(void); 210 int security_get_allow_unknown(void); 211 212 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 213 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 214 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 215 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 216 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 217 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 218 #define SECURITY_FS_USE_NATIVE 7 /* use native label support */ 219 #define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */ 220 221 int security_fs_use(struct super_block *sb); 222 223 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 224 u32 *sid); 225 226 #ifdef CONFIG_NETLABEL 227 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 228 u32 *sid); 229 230 int security_netlbl_sid_to_secattr(u32 sid, 231 struct netlbl_lsm_secattr *secattr); 232 #else 233 static inline int security_netlbl_secattr_to_sid( 234 struct netlbl_lsm_secattr *secattr, 235 u32 *sid) 236 { 237 return -EIDRM; 238 } 239 240 static inline int security_netlbl_sid_to_secattr(u32 sid, 241 struct netlbl_lsm_secattr *secattr) 242 { 243 return -ENOENT; 244 } 245 #endif /* CONFIG_NETLABEL */ 246 247 const char *security_get_initial_sid_context(u32 sid); 248 249 /* 250 * status notifier using mmap interface 251 */ 252 extern struct page *selinux_kernel_status_page(void); 253 254 #define SELINUX_KERNEL_STATUS_VERSION 1 255 struct selinux_kernel_status { 256 u32 version; /* version number of thie structure */ 257 u32 sequence; /* sequence number of seqlock logic */ 258 u32 enforcing; /* current setting of enforcing mode */ 259 u32 policyload; /* times of policy reloaded */ 260 u32 deny_unknown; /* current setting of deny_unknown */ 261 /* 262 * The version > 0 supports above members. 263 */ 264 } __packed; 265 266 extern void selinux_status_update_setenforce(int enforcing); 267 extern void selinux_status_update_policyload(int seqno); 268 extern void selinux_complete_init(void); 269 extern int selinux_disable(void); 270 extern void exit_sel_fs(void); 271 extern struct path selinux_null; 272 extern struct vfsmount *selinuxfs_mount; 273 extern void selnl_notify_setenforce(int val); 274 extern void selnl_notify_policyload(u32 seqno); 275 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 276 277 #endif /* _SELINUX_SECURITY_H_ */ 278 279