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 60 #define CONTEXT_STR "context=" 61 #define FSCONTEXT_STR "fscontext=" 62 #define ROOTCONTEXT_STR "rootcontext=" 63 #define DEFCONTEXT_STR "defcontext=" 64 #define LABELSUPP_STR "seclabel" 65 66 struct netlbl_lsm_secattr; 67 68 extern int selinux_enabled; 69 70 /* Policy capabilities */ 71 enum { 72 POLICYDB_CAPABILITY_NETPEER, 73 POLICYDB_CAPABILITY_OPENPERM, 74 POLICYDB_CAPABILITY_REDHAT1, 75 POLICYDB_CAPABILITY_ALWAYSNETWORK, 76 __POLICYDB_CAPABILITY_MAX 77 }; 78 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 79 80 extern int selinux_policycap_netpeer; 81 extern int selinux_policycap_openperm; 82 extern int selinux_policycap_alwaysnetwork; 83 84 /* 85 * type_datum properties 86 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 87 */ 88 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 89 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 90 91 /* limitation of boundary depth */ 92 #define POLICYDB_BOUNDS_MAXDEPTH 4 93 94 int security_mls_enabled(void); 95 96 int security_load_policy(void *data, size_t len); 97 int security_read_policy(void **data, size_t *len); 98 size_t security_policydb_len(void); 99 100 int security_policycap_supported(unsigned int req_cap); 101 102 #define SEL_VEC_MAX 32 103 struct av_decision { 104 u32 allowed; 105 u32 auditallow; 106 u32 auditdeny; 107 u32 seqno; 108 u32 flags; 109 }; 110 111 /* definitions of av_decision.flags */ 112 #define AVD_FLAGS_PERMISSIVE 0x0001 113 114 void security_compute_av(u32 ssid, u32 tsid, 115 u16 tclass, struct av_decision *avd); 116 117 void security_compute_av_user(u32 ssid, u32 tsid, 118 u16 tclass, struct av_decision *avd); 119 120 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 121 const struct qstr *qstr, u32 *out_sid); 122 123 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 124 const char *objname, u32 *out_sid); 125 126 int security_member_sid(u32 ssid, u32 tsid, 127 u16 tclass, u32 *out_sid); 128 129 int security_change_sid(u32 ssid, u32 tsid, 130 u16 tclass, u32 *out_sid); 131 132 int security_sid_to_context(u32 sid, char **scontext, 133 u32 *scontext_len); 134 135 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 136 137 int security_context_to_sid(const char *scontext, u32 scontext_len, 138 u32 *out_sid, gfp_t gfp); 139 140 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 141 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 142 143 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 144 u32 *sid); 145 146 int security_get_user_sids(u32 callsid, char *username, 147 u32 **sids, u32 *nel); 148 149 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 150 151 int security_netif_sid(char *name, u32 *if_sid); 152 153 int security_node_sid(u16 domain, void *addr, u32 addrlen, 154 u32 *out_sid); 155 156 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 157 u16 tclass); 158 159 int security_bounded_transition(u32 oldsid, u32 newsid); 160 161 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 162 163 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 164 u32 xfrm_sid, 165 u32 *peer_sid); 166 167 int security_get_classes(char ***classes, int *nclasses); 168 int security_get_permissions(char *class, char ***perms, int *nperms); 169 int security_get_reject_unknown(void); 170 int security_get_allow_unknown(void); 171 172 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 173 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 174 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 175 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 176 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 177 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 178 #define SECURITY_FS_USE_NATIVE 7 /* use native label support */ 179 #define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */ 180 181 int security_fs_use(struct super_block *sb); 182 183 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 184 u32 *sid); 185 186 #ifdef CONFIG_NETLABEL 187 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 188 u32 *sid); 189 190 int security_netlbl_sid_to_secattr(u32 sid, 191 struct netlbl_lsm_secattr *secattr); 192 #else 193 static inline int security_netlbl_secattr_to_sid( 194 struct netlbl_lsm_secattr *secattr, 195 u32 *sid) 196 { 197 return -EIDRM; 198 } 199 200 static inline int security_netlbl_sid_to_secattr(u32 sid, 201 struct netlbl_lsm_secattr *secattr) 202 { 203 return -ENOENT; 204 } 205 #endif /* CONFIG_NETLABEL */ 206 207 const char *security_get_initial_sid_context(u32 sid); 208 209 /* 210 * status notifier using mmap interface 211 */ 212 extern struct page *selinux_kernel_status_page(void); 213 214 #define SELINUX_KERNEL_STATUS_VERSION 1 215 struct selinux_kernel_status { 216 u32 version; /* version number of thie structure */ 217 u32 sequence; /* sequence number of seqlock logic */ 218 u32 enforcing; /* current setting of enforcing mode */ 219 u32 policyload; /* times of policy reloaded */ 220 u32 deny_unknown; /* current setting of deny_unknown */ 221 /* 222 * The version > 0 supports above members. 223 */ 224 } __packed; 225 226 extern void selinux_status_update_setenforce(int enforcing); 227 extern void selinux_status_update_policyload(int seqno); 228 extern void selinux_complete_init(void); 229 extern int selinux_disable(void); 230 extern void exit_sel_fs(void); 231 extern struct path selinux_null; 232 extern struct vfsmount *selinuxfs_mount; 233 extern void selnl_notify_setenforce(int val); 234 extern void selnl_notify_policyload(u32 seqno); 235 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 236 237 #endif /* _SELINUX_SECURITY_H_ */ 238 239