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 #define POLICYDB_VERSION_CONSTRAINT_NAMES 29 37 38 /* Range of policy versions we understand*/ 39 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 40 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 41 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 42 #else 43 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_CONSTRAINT_NAMES 44 #endif 45 46 /* Mask for just the mount related flags */ 47 #define SE_MNTMASK 0x0f 48 /* Super block security struct flags for mount options */ 49 /* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */ 50 #define CONTEXT_MNT 0x01 51 #define FSCONTEXT_MNT 0x02 52 #define ROOTCONTEXT_MNT 0x04 53 #define DEFCONTEXT_MNT 0x08 54 #define SBLABEL_MNT 0x10 55 /* Non-mount related flags */ 56 #define SE_SBINITIALIZED 0x0100 57 #define SE_SBPROC 0x0200 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_REDHAT1, 74 POLICYDB_CAPABILITY_ALWAYSNETWORK, 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_alwaysnetwork; 82 83 /* 84 * type_datum properties 85 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 86 */ 87 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 88 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 89 90 /* limitation of boundary depth */ 91 #define POLICYDB_BOUNDS_MAXDEPTH 4 92 93 int security_mls_enabled(void); 94 95 int security_load_policy(void *data, size_t len); 96 int security_read_policy(void **data, size_t *len); 97 size_t security_policydb_len(void); 98 99 int security_policycap_supported(unsigned int req_cap); 100 101 #define SEL_VEC_MAX 32 102 struct av_decision { 103 u32 allowed; 104 u32 auditallow; 105 u32 auditdeny; 106 u32 seqno; 107 u32 flags; 108 }; 109 110 /* definitions of av_decision.flags */ 111 #define AVD_FLAGS_PERMISSIVE 0x0001 112 113 void security_compute_av(u32 ssid, u32 tsid, 114 u16 tclass, struct av_decision *avd); 115 116 void security_compute_av_user(u32 ssid, u32 tsid, 117 u16 tclass, struct av_decision *avd); 118 119 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 120 const struct qstr *qstr, u32 *out_sid); 121 122 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 123 const char *objname, u32 *out_sid); 124 125 int security_member_sid(u32 ssid, u32 tsid, 126 u16 tclass, u32 *out_sid); 127 128 int security_change_sid(u32 ssid, u32 tsid, 129 u16 tclass, u32 *out_sid); 130 131 int security_sid_to_context(u32 sid, char **scontext, 132 u32 *scontext_len); 133 134 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 135 136 int security_context_to_sid(const char *scontext, u32 scontext_len, 137 u32 *out_sid, gfp_t gfp); 138 139 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 140 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 141 142 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 143 u32 *sid); 144 145 int security_get_user_sids(u32 callsid, char *username, 146 u32 **sids, u32 *nel); 147 148 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 149 150 int security_netif_sid(char *name, u32 *if_sid); 151 152 int security_node_sid(u16 domain, void *addr, u32 addrlen, 153 u32 *out_sid); 154 155 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 156 u16 tclass); 157 158 int security_bounded_transition(u32 oldsid, u32 newsid); 159 160 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 161 162 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 163 u32 xfrm_sid, 164 u32 *peer_sid); 165 166 int security_get_classes(char ***classes, int *nclasses); 167 int security_get_permissions(char *class, char ***perms, int *nperms); 168 int security_get_reject_unknown(void); 169 int security_get_allow_unknown(void); 170 171 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 172 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 173 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 174 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 175 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 176 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 177 #define SECURITY_FS_USE_NATIVE 7 /* use native label support */ 178 #define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */ 179 180 int security_fs_use(struct super_block *sb); 181 182 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 183 u32 *sid); 184 185 #ifdef CONFIG_NETLABEL 186 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 187 u32 *sid); 188 189 int security_netlbl_sid_to_secattr(u32 sid, 190 struct netlbl_lsm_secattr *secattr); 191 #else 192 static inline int security_netlbl_secattr_to_sid( 193 struct netlbl_lsm_secattr *secattr, 194 u32 *sid) 195 { 196 return -EIDRM; 197 } 198 199 static inline int security_netlbl_sid_to_secattr(u32 sid, 200 struct netlbl_lsm_secattr *secattr) 201 { 202 return -ENOENT; 203 } 204 #endif /* CONFIG_NETLABEL */ 205 206 const char *security_get_initial_sid_context(u32 sid); 207 208 /* 209 * status notifier using mmap interface 210 */ 211 extern struct page *selinux_kernel_status_page(void); 212 213 #define SELINUX_KERNEL_STATUS_VERSION 1 214 struct selinux_kernel_status { 215 u32 version; /* version number of thie structure */ 216 u32 sequence; /* sequence number of seqlock logic */ 217 u32 enforcing; /* current setting of enforcing mode */ 218 u32 policyload; /* times of policy reloaded */ 219 u32 deny_unknown; /* current setting of deny_unknown */ 220 /* 221 * The version > 0 supports above members. 222 */ 223 } __attribute__((packed)); 224 225 extern void selinux_status_update_setenforce(int enforcing); 226 extern void selinux_status_update_policyload(int seqno); 227 extern void selinux_complete_init(void); 228 extern int selinux_disable(void); 229 extern void exit_sel_fs(void); 230 extern struct path selinux_null; 231 extern struct vfsmount *selinuxfs_mount; 232 extern void selnl_notify_setenforce(int val); 233 extern void selnl_notify_policyload(u32 seqno); 234 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 235 236 #endif /* _SELINUX_SECURITY_H_ */ 237 238