security/selinux/include/security.h

   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
  57 struct netlbl_lsm_secattr;
  58
  59 extern int selinux_enabled;
  60 extern int selinux_mls_enabled;
  61
  62 /* Policy capabilities */
  63 enum {
  64         POLICYDB_CAPABILITY_NETPEER,
  65         POLICYDB_CAPABILITY_OPENPERM,
  66         __POLICYDB_CAPABILITY_MAX
  67 };
  68 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  69
  70 extern int selinux_policycap_netpeer;
  71 extern int selinux_policycap_openperm;
  72
  73 /*
  74  * type_datum properties
  75  * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
  76  */
  77 #define TYPEDATUM_PROPERTY_PRIMARY      0x0001
  78 #define TYPEDATUM_PROPERTY_ATTRIBUTE    0x0002
  79
  80 /* limitation of boundary depth  */
  81 #define POLICYDB_BOUNDS_MAXDEPTH        4
  82
  83 int security_load_policy(void *data, size_t len);
  84
  85 int security_policycap_supported(unsigned int req_cap);
  86
  87 #define SEL_VEC_MAX 32
  88 struct av_decision {
  89         u32 allowed;
  90         u32 auditallow;
  91         u32 auditdeny;
  92         u32 seqno;
  93         u32 flags;
  94 };
  95
  96 /* definitions of av_decision.flags */
  97 #define AVD_FLAGS_PERMISSIVE    0x0001
  98
  99 int security_compute_av(u32 ssid, u32 tsid,
 100         u16 tclass, u32 requested,
 101         struct av_decision *avd);
 102
 103 int security_transition_sid(u32 ssid, u32 tsid,
 104         u16 tclass, u32 *out_sid);
 105
 106 int security_member_sid(u32 ssid, u32 tsid,
 107         u16 tclass, u32 *out_sid);
 108
 109 int security_change_sid(u32 ssid, u32 tsid,
 110         u16 tclass, u32 *out_sid);
 111
 112 int security_sid_to_context(u32 sid, char **scontext,
 113         u32 *scontext_len);
 114
 115 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
 116
 117 int security_context_to_sid(const char *scontext, u32 scontext_len,
 118         u32 *out_sid);
 119
 120 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 121                                     u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 122
 123 int security_context_to_sid_force(const char *scontext, u32 scontext_len,
 124                                   u32 *sid);
 125
 126 int security_get_user_sids(u32 callsid, char *username,
 127                            u32 **sids, u32 *nel);
 128
 129 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
 130
 131 int security_netif_sid(char *name, u32 *if_sid);
 132
 133 int security_node_sid(u16 domain, void *addr, u32 addrlen,
 134         u32 *out_sid);
 135
 136 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 137                                  u16 tclass);
 138
 139 int security_bounded_transition(u32 oldsid, u32 newsid);
 140
 141 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 142
 143 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 144                                  u32 xfrm_sid,
 145                                  u32 *peer_sid);
 146
 147 int security_get_classes(char ***classes, int *nclasses);
 148 int security_get_permissions(char *class, char ***perms, int *nperms);
 149 int security_get_reject_unknown(void);
 150 int security_get_allow_unknown(void);
 151
 152 #define SECURITY_FS_USE_XATTR           1 /* use xattr */
 153 #define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
 154 #define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
 155 #define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 156 #define SECURITY_FS_USE_NONE            5 /* no labeling support */
 157 #define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 158
 159 int security_fs_use(const char *fstype, unsigned int *behavior,
 160         u32 *sid);
 161
 162 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 163         u32 *sid);
 164
 165 #ifdef CONFIG_NETLABEL
 166 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 167                                    u32 *sid);
 168
 169 int security_netlbl_sid_to_secattr(u32 sid,
 170                                    struct netlbl_lsm_secattr *secattr);
 171 #else
 172 static inline int security_netlbl_secattr_to_sid(
 173                                             struct netlbl_lsm_secattr *secattr,
 174                                             u32 *sid)
 175 {
 176         return -EIDRM;
 177 }
 178
 179 static inline int security_netlbl_sid_to_secattr(u32 sid,
 180                                            struct netlbl_lsm_secattr *secattr)
 181 {
 182         return -ENOENT;
 183 }
 184 #endif /* CONFIG_NETLABEL */
 185
 186 const char *security_get_initial_sid_context(u32 sid);
 187
 188 #endif /* _SELINUX_SECURITY_H_ */
 189