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
30 /* Range of policy versions we understand*/
31 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
32 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
33 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
34 #else
35 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_POLCAP
36 #endif
37
38 #define CONTEXT_MNT 0x01
39 #define FSCONTEXT_MNT 0x02
40 #define ROOTCONTEXT_MNT 0x04
41 #define DEFCONTEXT_MNT 0x08
42
43 struct netlbl_lsm_secattr;
44
45 extern int selinux_enabled;
46 extern int selinux_mls_enabled;
47
48 /* Policy capabilities */
49 enum {
50 POLICYDB_CAPABILITY_NETPEER,
51 __POLICYDB_CAPABILITY_MAX
52 };
53 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
54
55 extern int selinux_policycap_netpeer;
56
57 int security_load_policy(void * data, size_t len);
58
59 int security_policycap_supported(unsigned int req_cap);
60
61 #define SEL_VEC_MAX 32
62 struct av_decision {
63 u32 allowed;
64 u32 decided;
65 u32 auditallow;
66 u32 auditdeny;
67 u32 seqno;
68 };
69
70 int security_compute_av(u32 ssid, u32 tsid,
71 u16 tclass, u32 requested,
72 struct av_decision *avd);
73
74 int security_transition_sid(u32 ssid, u32 tsid,
75 u16 tclass, u32 *out_sid);
76
77 int security_member_sid(u32 ssid, u32 tsid,
78 u16 tclass, u32 *out_sid);
79
80 int security_change_sid(u32 ssid, u32 tsid,
81 u16 tclass, u32 *out_sid);
82
83 int security_sid_to_context(u32 sid, char **scontext,
84 u32 *scontext_len);
85
86 int security_context_to_sid(char *scontext, u32 scontext_len,
87 u32 *out_sid);
88
89 int security_context_to_sid_default(char *scontext, u32 scontext_len,
90 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
91
92 int security_get_user_sids(u32 callsid, char *username,
93 u32 **sids, u32 *nel);
94
95 int security_port_sid(u16 domain, u16 type, u8 protocol, u16 port,
96 u32 *out_sid);
97
98 int security_netif_sid(char *name, u32 *if_sid);
99
100 int security_node_sid(u16 domain, void *addr, u32 addrlen,
101 u32 *out_sid);
102
103 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
104 u16 tclass);
105
106 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
107
108 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
109 u32 xfrm_sid,
110 u32 *peer_sid);
111
112 int security_get_classes(char ***classes, int *nclasses);
113 int security_get_permissions(char *class, char ***perms, int *nperms);
114 int security_get_reject_unknown(void);
115 int security_get_allow_unknown(void);
116
117 #define SECURITY_FS_USE_XATTR 1 /* use xattr */
118 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
119 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
120 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
121 #define SECURITY_FS_USE_NONE 5 /* no labeling support */
122 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
123
124 int security_fs_use(const char *fstype, unsigned int *behavior,
125 u32 *sid);
126
127 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
128 u32 *sid);
129
130 #ifdef CONFIG_NETLABEL
131 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
132 u32 *sid);
133
134 int security_netlbl_sid_to_secattr(u32 sid,
135 struct netlbl_lsm_secattr *secattr);
136 #else
137 static inline int security_netlbl_secattr_to_sid(
138 struct netlbl_lsm_secattr *secattr,
139 u32 *sid)
140 {
141 return -EIDRM;
142 }
143
144 static inline int security_netlbl_sid_to_secattr(u32 sid,
145 struct netlbl_lsm_secattr *secattr)
146 {
147 return -ENOENT;
148 }
149 #endif /* CONFIG_NETLABEL */
150
151 const char *security_get_initial_sid_context(u32 sid);
152
153 #endif /* _SELINUX_SECURITY_H_ */
154
155
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