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