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