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 39 /* Range of policy versions we understand*/ 40 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 41 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 42 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 43 #else 44 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_CONSTRAINT_NAMES 45 #endif 46 47 /* Mask for just the mount related flags */ 48 #define SE_MNTMASK 0x0f 49 /* Super block security struct flags for mount options */ 50 /* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */ 51 #define CONTEXT_MNT 0x01 52 #define FSCONTEXT_MNT 0x02 53 #define ROOTCONTEXT_MNT 0x04 54 #define DEFCONTEXT_MNT 0x08 55 #define SBLABEL_MNT 0x10 56 /* Non-mount related flags */ 57 #define SE_SBINITIALIZED 0x0100 58 #define SE_SBPROC 0x0200 59 #define SE_SBGENFS 0x0400 60 61 #define CONTEXT_STR "context=" 62 #define FSCONTEXT_STR "fscontext=" 63 #define ROOTCONTEXT_STR "rootcontext=" 64 #define DEFCONTEXT_STR "defcontext=" 65 #define LABELSUPP_STR "seclabel" 66 67 struct netlbl_lsm_secattr; 68 69 extern int selinux_enabled; 70 71 /* Policy capabilities */ 72 enum { 73 POLICYDB_CAPABILITY_NETPEER, 74 POLICYDB_CAPABILITY_OPENPERM, 75 POLICYDB_CAPABILITY_REDHAT1, 76 POLICYDB_CAPABILITY_ALWAYSNETWORK, 77 __POLICYDB_CAPABILITY_MAX 78 }; 79 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 80 81 extern int selinux_policycap_netpeer; 82 extern int selinux_policycap_openperm; 83 extern int selinux_policycap_alwaysnetwork; 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 /* definitions of av_decision.flags */ 113 #define AVD_FLAGS_PERMISSIVE 0x0001 114 115 void security_compute_av(u32 ssid, u32 tsid, 116 u16 tclass, struct av_decision *avd); 117 118 void security_compute_av_user(u32 ssid, u32 tsid, 119 u16 tclass, struct av_decision *avd); 120 121 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 122 const struct qstr *qstr, u32 *out_sid); 123 124 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 125 const char *objname, u32 *out_sid); 126 127 int security_member_sid(u32 ssid, u32 tsid, 128 u16 tclass, u32 *out_sid); 129 130 int security_change_sid(u32 ssid, u32 tsid, 131 u16 tclass, u32 *out_sid); 132 133 int security_sid_to_context(u32 sid, char **scontext, 134 u32 *scontext_len); 135 136 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 137 138 int security_context_to_sid(const char *scontext, u32 scontext_len, 139 u32 *out_sid, gfp_t gfp); 140 141 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 142 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 143 144 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 145 u32 *sid); 146 147 int security_get_user_sids(u32 callsid, char *username, 148 u32 **sids, u32 *nel); 149 150 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 151 152 int security_netif_sid(char *name, u32 *if_sid); 153 154 int security_node_sid(u16 domain, void *addr, u32 addrlen, 155 u32 *out_sid); 156 157 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 158 u16 tclass); 159 160 int security_bounded_transition(u32 oldsid, u32 newsid); 161 162 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 163 164 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 165 u32 xfrm_sid, 166 u32 *peer_sid); 167 168 int security_get_classes(char ***classes, int *nclasses); 169 int security_get_permissions(char *class, char ***perms, int *nperms); 170 int security_get_reject_unknown(void); 171 int security_get_allow_unknown(void); 172 173 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 174 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 175 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 176 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 177 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 178 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 179 #define SECURITY_FS_USE_NATIVE 7 /* use native label support */ 180 #define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */ 181 182 int security_fs_use(struct super_block *sb); 183 184 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 185 u32 *sid); 186 187 #ifdef CONFIG_NETLABEL 188 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 189 u32 *sid); 190 191 int security_netlbl_sid_to_secattr(u32 sid, 192 struct netlbl_lsm_secattr *secattr); 193 #else 194 static inline int security_netlbl_secattr_to_sid( 195 struct netlbl_lsm_secattr *secattr, 196 u32 *sid) 197 { 198 return -EIDRM; 199 } 200 201 static inline int security_netlbl_sid_to_secattr(u32 sid, 202 struct netlbl_lsm_secattr *secattr) 203 { 204 return -ENOENT; 205 } 206 #endif /* CONFIG_NETLABEL */ 207 208 const char *security_get_initial_sid_context(u32 sid); 209 210 /* 211 * status notifier using mmap interface 212 */ 213 extern struct page *selinux_kernel_status_page(void); 214 215 #define SELINUX_KERNEL_STATUS_VERSION 1 216 struct selinux_kernel_status { 217 u32 version; /* version number of thie structure */ 218 u32 sequence; /* sequence number of seqlock logic */ 219 u32 enforcing; /* current setting of enforcing mode */ 220 u32 policyload; /* times of policy reloaded */ 221 u32 deny_unknown; /* current setting of deny_unknown */ 222 /* 223 * The version > 0 supports above members. 224 */ 225 } __packed; 226 227 extern void selinux_status_update_setenforce(int enforcing); 228 extern void selinux_status_update_policyload(int seqno); 229 extern void selinux_complete_init(void); 230 extern int selinux_disable(void); 231 extern void exit_sel_fs(void); 232 extern struct path selinux_null; 233 extern struct vfsmount *selinuxfs_mount; 234 extern void selnl_notify_setenforce(int val); 235 extern void selnl_notify_policyload(u32 seqno); 236 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 237 238 #endif /* _SELINUX_SECURITY_H_ */ 239 240