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 /* 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 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_REDHAT1, 73 POLICYDB_CAPABILITY_ALWAYSNETWORK, 74 __POLICYDB_CAPABILITY_MAX 75 }; 76 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 77 78 extern int selinux_policycap_netpeer; 79 extern int selinux_policycap_openperm; 80 extern int selinux_policycap_alwaysnetwork; 81 82 /* 83 * type_datum properties 84 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 85 */ 86 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 87 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 88 89 /* limitation of boundary depth */ 90 #define POLICYDB_BOUNDS_MAXDEPTH 4 91 92 int security_mls_enabled(void); 93 94 int security_load_policy(void *data, size_t len); 95 int security_read_policy(void **data, size_t *len); 96 size_t security_policydb_len(void); 97 98 int security_policycap_supported(unsigned int req_cap); 99 100 #define SEL_VEC_MAX 32 101 struct av_decision { 102 u32 allowed; 103 u32 auditallow; 104 u32 auditdeny; 105 u32 seqno; 106 u32 flags; 107 }; 108 109 /* definitions of av_decision.flags */ 110 #define AVD_FLAGS_PERMISSIVE 0x0001 111 112 void security_compute_av(u32 ssid, u32 tsid, 113 u16 tclass, struct av_decision *avd); 114 115 void security_compute_av_user(u32 ssid, u32 tsid, 116 u16 tclass, struct av_decision *avd); 117 118 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 119 const struct qstr *qstr, u32 *out_sid); 120 121 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 122 const char *objname, u32 *out_sid); 123 124 int security_member_sid(u32 ssid, u32 tsid, 125 u16 tclass, u32 *out_sid); 126 127 int security_change_sid(u32 ssid, u32 tsid, 128 u16 tclass, u32 *out_sid); 129 130 int security_sid_to_context(u32 sid, char **scontext, 131 u32 *scontext_len); 132 133 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 134 135 int security_context_to_sid(const char *scontext, u32 scontext_len, 136 u32 *out_sid); 137 138 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 139 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 140 141 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 142 u32 *sid); 143 144 int security_get_user_sids(u32 callsid, char *username, 145 u32 **sids, u32 *nel); 146 147 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 148 149 int security_netif_sid(char *name, u32 *if_sid); 150 151 int security_node_sid(u16 domain, void *addr, u32 addrlen, 152 u32 *out_sid); 153 154 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 155 u16 tclass); 156 157 int security_bounded_transition(u32 oldsid, u32 newsid); 158 159 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 160 161 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 162 u32 xfrm_sid, 163 u32 *peer_sid); 164 165 int security_get_classes(char ***classes, int *nclasses); 166 int security_get_permissions(char *class, char ***perms, int *nperms); 167 int security_get_reject_unknown(void); 168 int security_get_allow_unknown(void); 169 170 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 171 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 172 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 173 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 174 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 175 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 176 #define SECURITY_FS_USE_NATIVE 7 /* use native label support */ 177 #define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */ 178 179 int security_fs_use(struct super_block *sb); 180 181 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 182 u32 *sid); 183 184 #ifdef CONFIG_NETLABEL 185 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 186 u32 *sid); 187 188 int security_netlbl_sid_to_secattr(u32 sid, 189 struct netlbl_lsm_secattr *secattr); 190 #else 191 static inline int security_netlbl_secattr_to_sid( 192 struct netlbl_lsm_secattr *secattr, 193 u32 *sid) 194 { 195 return -EIDRM; 196 } 197 198 static inline int security_netlbl_sid_to_secattr(u32 sid, 199 struct netlbl_lsm_secattr *secattr) 200 { 201 return -ENOENT; 202 } 203 #endif /* CONFIG_NETLABEL */ 204 205 const char *security_get_initial_sid_context(u32 sid); 206 207 /* 208 * status notifier using mmap interface 209 */ 210 extern struct page *selinux_kernel_status_page(void); 211 212 #define SELINUX_KERNEL_STATUS_VERSION 1 213 struct selinux_kernel_status { 214 u32 version; /* version number of thie structure */ 215 u32 sequence; /* sequence number of seqlock logic */ 216 u32 enforcing; /* current setting of enforcing mode */ 217 u32 policyload; /* times of policy reloaded */ 218 u32 deny_unknown; /* current setting of deny_unknown */ 219 /* 220 * The version > 0 supports above members. 221 */ 222 } __attribute__((packed)); 223 224 extern void selinux_status_update_setenforce(int enforcing); 225 extern void selinux_status_update_policyload(int seqno); 226 extern void selinux_complete_init(void); 227 extern int selinux_disable(void); 228 extern void exit_sel_fs(void); 229 extern struct path selinux_null; 230 extern struct vfsmount *selinuxfs_mount; 231 extern void selnl_notify_setenforce(int val); 232 extern void selnl_notify_policyload(u32 seqno); 233 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 234 235 #endif /* _SELINUX_SECURITY_H_ */ 236 237