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
  29 /* Range of policy versions we understand*/
  30 #define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
  31 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
  32 #define POLICYDB_VERSION_MAX    CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
  33 #else
  34 #define POLICYDB_VERSION_MAX    POLICYDB_VERSION_RANGETRANS
  35 #endif
  36
  37 struct netlbl_lsm_secattr;
  38
  39 extern int selinux_enabled;
  40 extern int selinux_mls_enabled;
  41
  42 int security_load_policy(void * data, size_t len);
  43
  44 #define SEL_VEC_MAX 32
  45 struct av_decision {
  46         u32 allowed;
  47         u32 decided;
  48         u32 auditallow;
  49         u32 auditdeny;
  50         u32 seqno;
  51 };
  52
  53 int security_compute_av(u32 ssid, u32 tsid,
  54         u16 tclass, u32 requested,
  55         struct av_decision *avd);
  56
  57 int security_transition_sid(u32 ssid, u32 tsid,
  58         u16 tclass, u32 *out_sid);
  59
  60 int security_member_sid(u32 ssid, u32 tsid,
  61         u16 tclass, u32 *out_sid);
  62
  63 int security_change_sid(u32 ssid, u32 tsid,
  64         u16 tclass, u32 *out_sid);
  65
  66 int security_sid_to_context(u32 sid, char **scontext,
  67         u32 *scontext_len);
  68
  69 int security_context_to_sid(char *scontext, u32 scontext_len,
  70         u32 *out_sid);
  71
  72 int security_context_to_sid_default(char *scontext, u32 scontext_len, u32 *out_sid, u32 def_sid);
  73
  74 int security_get_user_sids(u32 callsid, char *username,
  75                            u32 **sids, u32 *nel);
  76
  77 int security_port_sid(u16 domain, u16 type, u8 protocol, u16 port,
  78         u32 *out_sid);
  79
  80 int security_netif_sid(char *name, u32 *if_sid,
  81         u32 *msg_sid);
  82
  83 int security_node_sid(u16 domain, void *addr, u32 addrlen,
  84         u32 *out_sid);
  85
  86 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
  87                                  u16 tclass);
  88
  89 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
  90
  91 int security_get_classes(char ***classes, int *nclasses);
  92 int security_get_permissions(char *class, char ***perms, int *nperms);
  93 int security_get_reject_unknown(void);
  94 int security_get_allow_unknown(void);
  95
  96 #define SECURITY_FS_USE_XATTR           1 /* use xattr */
  97 #define SECURITY_FS_USE_TRANS           2 /* use transition SIDs, e.g. devpts/tmpfs */
  98 #define SECURITY_FS_USE_TASK            3 /* use task SIDs, e.g. pipefs/sockfs */
  99 #define SECURITY_FS_USE_GENFS           4 /* use the genfs support */
 100 #define SECURITY_FS_USE_NONE            5 /* no labeling support */
 101 #define SECURITY_FS_USE_MNTPOINT        6 /* use mountpoint labeling */
 102
 103 int security_fs_use(const char *fstype, unsigned int *behavior,
 104         u32 *sid);
 105
 106 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
 107         u32 *sid);
 108
 109 #ifdef CONFIG_NETLABEL
 110 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
 111                                    u32 base_sid,
 112                                    u32 *sid);
 113
 114 int security_netlbl_sid_to_secattr(u32 sid,
 115                                    struct netlbl_lsm_secattr *secattr);
 116 #else
 117 static inline int security_netlbl_secattr_to_sid(
 118                                             struct netlbl_lsm_secattr *secattr,
 119                                             u32 base_sid,
 120                                             u32 *sid)
 121 {
 122         return -EIDRM;
 123 }
 124
 125 static inline int security_netlbl_sid_to_secattr(u32 sid,
 126                                            struct netlbl_lsm_secattr *secattr)
 127 {
 128         return -ENOENT;
 129 }
 130 #endif /* CONFIG_NETLABEL */
 131
 132 const char *security_get_initial_sid_context(u32 sid);
 133
 134 #endif /* _SELINUX_SECURITY_H_ */
 135