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
  61 /* Policy capabilities */
  62 enum {
  63         POLICYDB_CAPABILITY_NETPEER,
  64         POLICYDB_CAPABILITY_OPENPERM,
  65         __POLICYDB_CAPABILITY_MAX
  66 };
  67 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
  68
  69 extern int selinux_policycap_netpeer;
  70 extern 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
  82 int security_mls_enabled(void);
  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         u32 flags;
  95 };
  96
  97 /* definitions of av_decision.flags */
  98 #define AVD_FLAGS_PERMISSIVE    0x0001
  99
 100 void security_compute_av(u32 ssid, u32 tsid,
 101                          u16 tclass, struct av_decision *avd);
 102
 103 void security_compute_av_user(u32 ssid, u32 tsid,
 104                              u16 tclass, struct av_decision *avd);
 105
 106 int security_transition_sid(u32 ssid, u32 tsid,
 107                             u16 tclass, u32 *out_sid);
 108
 109 int security_transition_sid_user(u32 ssid, u32 tsid,
 110                                  u16 tclass, u32 *out_sid);
 111
 112 int security_member_sid(u32 ssid, u32 tsid,
 113         u16 tclass, u32 *out_sid);
 114
 115 int security_change_sid(u32 ssid, u32 tsid,
 116         u16 tclass, u32 *out_sid);
 117
 118 int security_sid_to_context(u32 sid, char **scontext,
 119         u32 *scontext_len);
 120
 121 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
 122
 123 int security_context_to_sid(const char *scontext, u32 scontext_len,
 124         u32 *out_sid);
 125
 126 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
 127                                     u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
 128
 129 int security_context_to_sid_force(const char *scontext, u32 scontext_len,
 130                                   u32 *sid);
 131
 132 int security_get_user_sids(u32 callsid, char *username,
 133                            u32 **sids, u32 *nel);
 134
 135 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
 136
 137 int security_netif_sid(char *name, u32 *if_sid);
 138
 139 int security_node_sid(u16 domain, void *addr, u32 addrlen,
 140         u32 *out_sid);
 141
 142 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
 143                                  u16 tclass);
 144
 145 int security_bounded_transition(u32 oldsid, u32 newsid);
 146
 147 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
 148
 149 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
 150                                  u32 xfrm_sid,
 151                                  u32 *peer_sid);
 152
 153 int security_get_classes(char ***classes, int *nclasses);
 154 int security_get_permissions(char *class, char ***perms, int *nperms);
 155 int security_get_reject_unknown(void);
 156 int 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
 165 int security_fs_use(const char *fstype, unsigned int *behavior,
 166         u32 *sid);
 167
 168 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 169         u32 *sid);
 170
 171 #ifdef CONFIG_NETLABEL
 172 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 173                                    u32 *sid);
 174
 175 int security_netlbl_sid_to_secattr(u32 sid,
 176                                    struct netlbl_lsm_secattr *secattr);
 177 #else
 178 static inline int security_netlbl_secattr_to_sid(
 179                                             struct netlbl_lsm_secattr *secattr,
 180                                             u32 *sid)
 181 {
 182         return -EIDRM;
 183 }
 184
 185 static 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
 192 const char *security_get_initial_sid_context(u32 sid);
 193
 194 #endif /* _SELINUX_SECURITY_H_ */
 195