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 34 /* Range of policy versions we understand*/ 35 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 36 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 37 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 38 #else 39 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_FILENAME_TRANS 40 #endif 41 42 /* Mask for just the mount related flags */ 43 #define SE_MNTMASK 0x0f 44 /* Super block security struct flags for mount options */ 45 #define CONTEXT_MNT 0x01 46 #define FSCONTEXT_MNT 0x02 47 #define ROOTCONTEXT_MNT 0x04 48 #define DEFCONTEXT_MNT 0x08 49 /* Non-mount related flags */ 50 #define SE_SBINITIALIZED 0x10 51 #define SE_SBPROC 0x20 52 #define SE_SBLABELSUPP 0x40 53 54 #define CONTEXT_STR "context=" 55 #define FSCONTEXT_STR "fscontext=" 56 #define ROOTCONTEXT_STR "rootcontext=" 57 #define DEFCONTEXT_STR "defcontext=" 58 #define LABELSUPP_STR "seclabel" 59 60 struct netlbl_lsm_secattr; 61 62 extern int selinux_enabled; 63 64 /* Policy capabilities */ 65 enum { 66 POLICYDB_CAPABILITY_NETPEER, 67 POLICYDB_CAPABILITY_OPENPERM, 68 __POLICYDB_CAPABILITY_MAX 69 }; 70 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 71 72 extern int selinux_policycap_netpeer; 73 extern int selinux_policycap_openperm; 74 75 /* 76 * type_datum properties 77 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 78 */ 79 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 80 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 81 82 /* limitation of boundary depth */ 83 #define POLICYDB_BOUNDS_MAXDEPTH 4 84 85 int security_mls_enabled(void); 86 87 int security_load_policy(void *data, size_t len); 88 int security_read_policy(void **data, ssize_t *len); 89 size_t security_policydb_len(void); 90 91 int security_policycap_supported(unsigned int req_cap); 92 93 #define SEL_VEC_MAX 32 94 struct av_decision { 95 u32 allowed; 96 u32 auditallow; 97 u32 auditdeny; 98 u32 seqno; 99 u32 flags; 100 }; 101 102 /* definitions of av_decision.flags */ 103 #define AVD_FLAGS_PERMISSIVE 0x0001 104 105 void security_compute_av(u32 ssid, u32 tsid, 106 u16 tclass, struct av_decision *avd); 107 108 void security_compute_av_user(u32 ssid, u32 tsid, 109 u16 tclass, struct av_decision *avd); 110 111 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 112 const struct qstr *qstr, u32 *out_sid); 113 114 int security_transition_sid_user(u32 ssid, u32 tsid, 115 u16 tclass, u32 *out_sid); 116 117 int security_member_sid(u32 ssid, u32 tsid, 118 u16 tclass, u32 *out_sid); 119 120 int security_change_sid(u32 ssid, u32 tsid, 121 u16 tclass, u32 *out_sid); 122 123 int security_sid_to_context(u32 sid, char **scontext, 124 u32 *scontext_len); 125 126 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 127 128 int security_context_to_sid(const char *scontext, u32 scontext_len, 129 u32 *out_sid); 130 131 int security_context_to_sid_default(const char *scontext, u32 scontext_len, 132 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 133 134 int security_context_to_sid_force(const char *scontext, u32 scontext_len, 135 u32 *sid); 136 137 int security_get_user_sids(u32 callsid, char *username, 138 u32 **sids, u32 *nel); 139 140 int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 141 142 int security_netif_sid(char *name, u32 *if_sid); 143 144 int security_node_sid(u16 domain, void *addr, u32 addrlen, 145 u32 *out_sid); 146 147 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 148 u16 tclass); 149 150 int security_bounded_transition(u32 oldsid, u32 newsid); 151 152 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 153 154 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 155 u32 xfrm_sid, 156 u32 *peer_sid); 157 158 int security_get_classes(char ***classes, int *nclasses); 159 int security_get_permissions(char *class, char ***perms, int *nperms); 160 int security_get_reject_unknown(void); 161 int security_get_allow_unknown(void); 162 163 #define SECURITY_FS_USE_XATTR 1 /* use xattr */ 164 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 165 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 166 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 167 #define SECURITY_FS_USE_NONE 5 /* no labeling support */ 168 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 169 170 int security_fs_use(const char *fstype, unsigned int *behavior, 171 u32 *sid); 172 173 int security_genfs_sid(const char *fstype, char *name, u16 sclass, 174 u32 *sid); 175 176 #ifdef CONFIG_NETLABEL 177 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 178 u32 *sid); 179 180 int security_netlbl_sid_to_secattr(u32 sid, 181 struct netlbl_lsm_secattr *secattr); 182 #else 183 static inline int security_netlbl_secattr_to_sid( 184 struct netlbl_lsm_secattr *secattr, 185 u32 *sid) 186 { 187 return -EIDRM; 188 } 189 190 static inline int security_netlbl_sid_to_secattr(u32 sid, 191 struct netlbl_lsm_secattr *secattr) 192 { 193 return -ENOENT; 194 } 195 #endif /* CONFIG_NETLABEL */ 196 197 const char *security_get_initial_sid_context(u32 sid); 198 199 /* 200 * status notifier using mmap interface 201 */ 202 extern struct page *selinux_kernel_status_page(void); 203 204 #define SELINUX_KERNEL_STATUS_VERSION 1 205 struct selinux_kernel_status { 206 u32 version; /* version number of thie structure */ 207 u32 sequence; /* sequence number of seqlock logic */ 208 u32 enforcing; /* current setting of enforcing mode */ 209 u32 policyload; /* times of policy reloaded */ 210 u32 deny_unknown; /* current setting of deny_unknown */ 211 /* 212 * The version > 0 supports above members. 213 */ 214 } __attribute__((packed)); 215 216 extern void selinux_status_update_setenforce(int enforcing); 217 extern void selinux_status_update_policyload(int seqno); 218 219 #endif /* _SELINUX_SECURITY_H_ */ 220 221