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 "flask.h"
  12
  13 #define SECSID_NULL                     0x00000000 /* unspecified SID */
  14 #define SECSID_WILD                     0xffffffff /* wildcard SID */
  15 #define SECCLASS_NULL                   0x0000 /* no class */
  16
  17 #define SELINUX_MAGIC 0xf97cff8c
  18
  19 /* Identify specific policy version changes */
  20 #define POLICYDB_VERSION_BASE           15
  21 #define POLICYDB_VERSION_BOOL           16
  22 #define POLICYDB_VERSION_IPV6           17
  23 #define POLICYDB_VERSION_NLCLASS        18
  24 #define POLICYDB_VERSION_VALIDATETRANS  19
  25 #define POLICYDB_VERSION_MLS            19
  26 #define POLICYDB_VERSION_AVTAB          20
  27 #define POLICYDB_VERSION_RANGETRANS     21
  28 #define POLICYDB_VERSION_POLCAP         22
  29 #define POLICYDB_VERSION_PERMISSIVE     23
  30 #define POLICYDB_VERSION_BOUNDARY       24
  31
  32 /* Range of policy versions we understand*/
  33 #define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
  34 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
  35 #define POLICYDB_VERSION_MAX    CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
  36 #else
  37 #define POLICYDB_VERSION_MAX    POLICYDB_VERSION_BOUNDARY
  38 #endif
  39
  40 /* Mask for just the mount related flags */
  41 #define SE_MNTMASK      0x0f
  42 /* Super block security struct flags for mount options */
  43 #define CONTEXT_MNT     0x01
  44 #define FSCONTEXT_MNT   0x02
  45 #define ROOTCONTEXT_MNT 0x04
  46 #define DEFCONTEXT_MNT  0x08
  47 /* Non-mount related flags */
  48 #define SE_SBINITIALIZED        0x10
  49 #define SE_SBPROC               0x20
  50 #define SE_SBLABELSUPP  0x40
  51
  52 #define CONTEXT_STR     "context="
  53 #define FSCONTEXT_STR   "fscontext="
  54 #define ROOTCONTEXT_STR "rootcontext="
  55 #define DEFCONTEXT_STR  "defcontext="
  56 #define LABELSUPP_STR "seclabel"
  57
  58 struct netlbl_lsm_secattr;
  59
  60 extern int selinux_enabled;
  61 extern int selinux_mls_enabled;
  62
  63 /* Policy capabilities */
  64 enum {
  65         POLICYDB_CAPABILITY_NETPEER,
  66         POLICYDB_CAPABILITY_OPENPERM,
  67         __POLICYDB_CAPABILITY_MAX
  68 };
  69 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  70
  71 extern int selinux_policycap_netpeer;
  72 extern int selinux_policycap_openperm;
  73
  74 /*
  75  * type_datum properties
  76  * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
  77  */
  78 #define TYPEDATUM_PROPERTY_PRIMARY      0x0001
  79 #define TYPEDATUM_PROPERTY_ATTRIBUTE    0x0002
  80
  81 /* limitation of boundary depth  */
  82 #define POLICYDB_BOUNDS_MAXDEPTH        4
  83
  84 int security_load_policy(void *data, size_t len);
  85
  86 int security_policycap_supported(unsigned int req_cap);
  87
  88 #define SEL_VEC_MAX 32
  89 struct av_decision {
  90         u32 allowed;
  91         u32 auditallow;
  92         u32 auditdeny;
  93         u32 seqno;
  94 };
  95
  96 int security_permissive_sid(u32 sid);
  97
  98 int security_compute_av(u32 ssid, u32 tsid,
  99         u16 tclass, u32 requested,
 100         struct av_decision *avd);
 101
 102 int security_transition_sid(u32 ssid, u32 tsid,
 103         u16 tclass, u32 *out_sid);
 104
 105 int security_member_sid(u32 ssid, u32 tsid,
 106         u16 tclass, u32 *out_sid);
 107
 108 int security_change_sid(u32 ssid, u32 tsid,
 109         u16 tclass, u32 *out_sid);
 110
 111 int security_sid_to_context(u32 sid, char **scontext,
 112         u32 *scontext_len);
 113
 114 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
 115
 116 int security_context_to_sid(const char *scontext, u32 scontext_len,
 117         u32 *out_sid);
 118
 119 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 120                                     u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 121
 122 int security_context_to_sid_force(const char *scontext, u32 scontext_len,
 123                                   u32 *sid);
 124
 125 int security_get_user_sids(u32 callsid, char *username,
 126                            u32 **sids, u32 *nel);
 127
 128 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
 129
 130 int security_netif_sid(char *name, u32 *if_sid);
 131
 132 int security_node_sid(u16 domain, void *addr, u32 addrlen,
 133         u32 *out_sid);
 134
 135 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 136                                  u16 tclass);
 137
 138 int security_bounded_transition(u32 oldsid, u32 newsid);
 139
 140 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 141
 142 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 143                                  u32 xfrm_sid,
 144                                  u32 *peer_sid);
 145
 146 int security_get_classes(char ***classes, int *nclasses);
 147 int security_get_permissions(char *class, char ***perms, int *nperms);
 148 int security_get_reject_unknown(void);
 149 int security_get_allow_unknown(void);
 150
 151 #define SECURITY_FS_USE_XATTR           1 /* use xattr */
 152 #define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
 153 #define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
 154 #define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 155 #define SECURITY_FS_USE_NONE            5 /* no labeling support */
 156 #define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 157
 158 int security_fs_use(const char *fstype, unsigned int *behavior,
 159         u32 *sid);
 160
 161 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 162         u32 *sid);
 163
 164 #ifdef CONFIG_NETLABEL
 165 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 166                                    u32 *sid);
 167
 168 int security_netlbl_sid_to_secattr(u32 sid,
 169                                    struct netlbl_lsm_secattr *secattr);
 170 #else
 171 static inline int security_netlbl_secattr_to_sid(
 172                                             struct netlbl_lsm_secattr *secattr,
 173                                             u32 *sid)
 174 {
 175         return -EIDRM;
 176 }
 177
 178 static inline int security_netlbl_sid_to_secattr(u32 sid,
 179                                            struct netlbl_lsm_secattr *secattr)
 180 {
 181         return -ENOENT;
 182 }
 183 #endif /* CONFIG_NETLABEL */
 184
 185 const char *security_get_initial_sid_context(u32 sid);
 186
 187 #endif /* _SELINUX_SECURITY_H_ */
 188