security.h revision 782ebb992ec20b5afdd5786ee8c2f1b58b631f24 
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
28/* Range of policy versions we understand*/
29#define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
30#define POLICYDB_VERSION_MAX   POLICYDB_VERSION_AVTAB
31
32#ifdef CONFIG_SECURITY_SELINUX_BOOTPARAM
33extern int selinux_enabled;
34#else
35#define selinux_enabled 1
36#endif
37
38extern int selinux_mls_enabled;
39
40int security_load_policy(void * data, size_t len);
41
42struct av_decision {
43	u32 allowed;
44	u32 decided;
45	u32 auditallow;
46	u32 auditdeny;
47	u32 seqno;
48};
49
50int security_compute_av(u32 ssid, u32 tsid,
51	u16 tclass, u32 requested,
52	struct av_decision *avd);
53
54int security_transition_sid(u32 ssid, u32 tsid,
55	u16 tclass, u32 *out_sid);
56
57int security_member_sid(u32 ssid, u32 tsid,
58	u16 tclass, u32 *out_sid);
59
60int security_change_sid(u32 ssid, u32 tsid,
61	u16 tclass, u32 *out_sid);
62
63int security_sid_to_context(u32 sid, char **scontext,
64	u32 *scontext_len);
65
66int security_context_to_sid(char *scontext, u32 scontext_len,
67	u32 *out_sid);
68
69int security_context_to_sid_default(char *scontext, u32 scontext_len, u32 *out_sid, u32 def_sid);
70
71int security_get_user_sids(u32 callsid, char *username,
72			   u32 **sids, u32 *nel);
73
74int security_port_sid(u16 domain, u16 type, u8 protocol, u16 port,
75	u32 *out_sid);
76
77int security_netif_sid(char *name, u32 *if_sid,
78	u32 *msg_sid);
79
80int security_node_sid(u16 domain, void *addr, u32 addrlen,
81	u32 *out_sid);
82
83int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
84                                 u16 tclass);
85
86#define SECURITY_FS_USE_XATTR		1 /* use xattr */
87#define SECURITY_FS_USE_TRANS		2 /* use transition SIDs, e.g. devpts/tmpfs */
88#define SECURITY_FS_USE_TASK		3 /* use task SIDs, e.g. pipefs/sockfs */
89#define SECURITY_FS_USE_GENFS		4 /* use the genfs support */
90#define SECURITY_FS_USE_NONE		5 /* no labeling support */
91#define SECURITY_FS_USE_MNTPOINT	6 /* use mountpoint labeling */
92
93int security_fs_use(const char *fstype, unsigned int *behavior,
94	u32 *sid);
95
96int security_genfs_sid(const char *fstype, char *name, u16 sclass,
97	u32 *sid);
98
99#endif /* _SELINUX_SECURITY_H_ */
100
101