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 66struct netlbl_lsm_secattr; 67 68extern int selinux_enabled; 69 70/* Policy capabilities */ 71enum { 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 80extern int selinux_policycap_netpeer; 81extern int selinux_policycap_openperm; 82extern 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 94int security_mls_enabled(void); 95 96int security_load_policy(void *data, size_t len); 97int security_read_policy(void **data, size_t *len); 98size_t security_policydb_len(void); 99 100int security_policycap_supported(unsigned int req_cap); 101 102#define SEL_VEC_MAX 32 103struct 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 114void security_compute_av(u32 ssid, u32 tsid, 115 u16 tclass, struct av_decision *avd); 116 117void security_compute_av_user(u32 ssid, u32 tsid, 118 u16 tclass, struct av_decision *avd); 119 120int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, 121 const struct qstr *qstr, u32 *out_sid); 122 123int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, 124 const char *objname, u32 *out_sid); 125 126int security_member_sid(u32 ssid, u32 tsid, 127 u16 tclass, u32 *out_sid); 128 129int security_change_sid(u32 ssid, u32 tsid, 130 u16 tclass, u32 *out_sid); 131 132int security_sid_to_context(u32 sid, char **scontext, 133 u32 *scontext_len); 134 135int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len); 136 137int security_context_to_sid(const char *scontext, u32 scontext_len, 138 u32 *out_sid, gfp_t gfp); 139 140int security_context_to_sid_default(const char *scontext, u32 scontext_len, 141 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 142 143int security_context_to_sid_force(const char *scontext, u32 scontext_len, 144 u32 *sid); 145 146int security_get_user_sids(u32 callsid, char *username, 147 u32 **sids, u32 *nel); 148 149int security_port_sid(u8 protocol, u16 port, u32 *out_sid); 150 151int security_netif_sid(char *name, u32 *if_sid); 152 153int security_node_sid(u16 domain, void *addr, u32 addrlen, 154 u32 *out_sid); 155 156int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, 157 u16 tclass); 158 159int security_bounded_transition(u32 oldsid, u32 newsid); 160 161int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid); 162 163int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, 164 u32 xfrm_sid, 165 u32 *peer_sid); 166 167int security_get_classes(char ***classes, int *nclasses); 168int security_get_permissions(char *class, char ***perms, int *nperms); 169int security_get_reject_unknown(void); 170int 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 181int security_fs_use(struct super_block *sb); 182 183int security_genfs_sid(const char *fstype, char *name, u16 sclass, 184 u32 *sid); 185 186#ifdef CONFIG_NETLABEL 187int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, 188 u32 *sid); 189 190int security_netlbl_sid_to_secattr(u32 sid, 191 struct netlbl_lsm_secattr *secattr); 192#else 193static inline int security_netlbl_secattr_to_sid( 194 struct netlbl_lsm_secattr *secattr, 195 u32 *sid) 196{ 197 return -EIDRM; 198} 199 200static 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 207const char *security_get_initial_sid_context(u32 sid); 208 209/* 210 * status notifier using mmap interface 211 */ 212extern struct page *selinux_kernel_status_page(void); 213 214#define SELINUX_KERNEL_STATUS_VERSION 1 215struct 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 226extern void selinux_status_update_setenforce(int enforcing); 227extern void selinux_status_update_policyload(int seqno); 228extern void selinux_complete_init(void); 229extern int selinux_disable(void); 230extern void exit_sel_fs(void); 231extern struct path selinux_null; 232extern struct vfsmount *selinuxfs_mount; 233extern void selnl_notify_setenforce(int val); 234extern void selnl_notify_policyload(u32 seqno); 235extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm); 236 237#endif /* _SELINUX_SECURITY_H_ */ 238 239