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/magic.h> 12#include "flask.h" 13 14#define SECSID_NULL 0x00000000 /* unspecified SID */ 15#define SECSID_WILD 0xffffffff /* wildcard SID */ 16#define SECCLASS_NULL 0x0000 /* no class */ 17 18/* Identify specific policy version changes */ 19#define POLICYDB_VERSION_BASE 15 20#define POLICYDB_VERSION_BOOL 16 21#define POLICYDB_VERSION_IPV6 17 22#define POLICYDB_VERSION_NLCLASS 18 23#define POLICYDB_VERSION_VALIDATETRANS 19 24#define POLICYDB_VERSION_MLS 19 25#define POLICYDB_VERSION_AVTAB 20 26#define POLICYDB_VERSION_RANGETRANS 21 27#define POLICYDB_VERSION_POLCAP 22 28#define POLICYDB_VERSION_PERMISSIVE 23 29#define POLICYDB_VERSION_BOUNDARY 24 30 31/* Range of policy versions we understand*/ 32#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 33#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX 34#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE 35#else 36#define POLICYDB_VERSION_MAX POLICYDB_VERSION_BOUNDARY 37#endif 38 39/* Mask for just the mount related flags */ 40#define SE_MNTMASK 0x0f 41/* Super block security struct flags for mount options */ 42#define CONTEXT_MNT 0x01 43#define FSCONTEXT_MNT 0x02 44#define ROOTCONTEXT_MNT 0x04 45#define DEFCONTEXT_MNT 0x08 46/* Non-mount related flags */ 47#define SE_SBINITIALIZED 0x10 48#define SE_SBPROC 0x20 49#define SE_SBLABELSUPP 0x40 50 51#define CONTEXT_STR "context=" 52#define FSCONTEXT_STR "fscontext=" 53#define ROOTCONTEXT_STR "rootcontext=" 54#define DEFCONTEXT_STR "defcontext=" 55#define LABELSUPP_STR "seclabel" 56 57struct netlbl_lsm_secattr; 58 59extern int selinux_enabled; 60 61/* Policy capabilities */ 62enum { 63 POLICYDB_CAPABILITY_NETPEER, 64 POLICYDB_CAPABILITY_OPENPERM, 65 __POLICYDB_CAPABILITY_MAX 66}; 67#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1) 68 69extern int selinux_policycap_netpeer; 70extern int selinux_policycap_openperm; 71 72/* 73 * type_datum properties 74 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY 75 */ 76#define TYPEDATUM_PROPERTY_PRIMARY 0x0001 77#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 78 79/* limitation of boundary depth */ 80#define POLICYDB_BOUNDS_MAXDEPTH 4 81 82int security_mls_enabled(void); 83 84int security_load_policy(void *data, size_t len); 85 86int security_policycap_supported(unsigned int req_cap); 87 88#define SEL_VEC_MAX 32 89struct av_decision { 90 u32 allowed; 91 u32 auditallow; 92 u32 auditdeny; 93 u32 seqno; 94 u32 flags; 95}; 96 97/* definitions of av_decision.flags */ 98#define AVD_FLAGS_PERMISSIVE 0x0001 99 100void security_compute_av(u32 ssid, u32 tsid, 101 u16 tclass, struct av_decision *avd); 102 103void security_compute_av_user(u32 ssid, u32 tsid, 104 u16 tclass, struct av_decision *avd); 105 106int security_transition_sid(u32 ssid, u32 tsid, 107 u16 tclass, u32 *out_sid); 108 109int security_transition_sid_user(u32 ssid, u32 tsid, 110 u16 tclass, u32 *out_sid); 111 112int security_member_sid(u32 ssid, u32 tsid, 113 u16 tclass, u32 *out_sid); 114 115int security_change_sid(u32 ssid, u32 tsid, 116 u16 tclass, u32 *out_sid); 117 118int security_sid_to_context(u32 sid, char **scontext, 119 u32 *scontext_len); 120 121int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 122 123int security_context_to_sid(const char *scontext, u32 scontext_len, 124 u32 *out_sid); 125 126int security_context_to_sid_default(const char *scontext, u32 scontext_len, 127 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 128 129int security_context_to_sid_force(const char *scontext, u32 scontext_len, 130 u32 *sid); 131 132int security_get_user_sids(u32 callsid, char *username, 133 u32 **sids, u32 *nel); 134 135int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 136 137int security_netif_sid(char *name, u32 *if_sid); 138 139int security_node_sid(u16 domain, void *addr, u32 addrlen, 140 u32 *out_sid); 141 142int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 143 u16 tclass); 144 145int security_bounded_transition(u32 oldsid, u32 newsid); 146 147int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 148 149int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 150 u32 xfrm_sid, 151 u32 *peer_sid); 152 153int security_get_classes(char ***classes, int *nclasses); 154int security_get_permissions(char *class, char ***perms, int *nperms); 155int security_get_reject_unknown(void); 156int security_get_allow_unknown(void); 157 158#define SECURITY_FS_USE_XATTR 1 /* use xattr */ 159#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */ 160#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */ 161#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */ 162#define SECURITY_FS_USE_NONE 5 /* no labeling support */ 163#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 164 165int security_fs_use(const char *fstype, unsigned int *behavior, 166 u32 *sid); 167 168int security_genfs_sid(const char *fstype, char *name, u16 sclass, 169 u32 *sid); 170 171#ifdef CONFIG_NETLABEL 172int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 173 u32 *sid); 174 175int security_netlbl_sid_to_secattr(u32 sid, 176 struct netlbl_lsm_secattr *secattr); 177#else 178static inline int security_netlbl_secattr_to_sid( 179 struct netlbl_lsm_secattr *secattr, 180 u32 *sid) 181{ 182 return -EIDRM; 183} 184 185static inline int security_netlbl_sid_to_secattr(u32 sid, 186 struct netlbl_lsm_secattr *secattr) 187{ 188 return -ENOENT; 189} 190#endif /* CONFIG_NETLABEL */ 191 192const char *security_get_initial_sid_context(u32 sid); 193 194#endif /* _SELINUX_SECURITY_H_ */ 195