tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
57struct netlbl_lsm_secattr;
58
59extern int selinux_enabled;
60
61/* Policy capabilities */
62enum {
63 POLICYDB_CAPABILITY_NETPEER,
64 POLICYDB_CAPABILITY_OPENPERM,
65 __POLICYDB_CAPABILITY_MAX
66};
67#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
68
69extern int selinux_policycap_netpeer;
70extern 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
82int security_mls_enabled(void);
83
84int security_load_policy(void *data, size_t len);
85
86int security_policycap_supported(unsigned int req_cap);
87
88#define SEL_VEC_MAX 32
89struct 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
100void security_compute_av(u32 ssid, u32 tsid,
101 u16 tclass, struct av_decision *avd);
102
103void security_compute_av_user(u32 ssid, u32 tsid,
104 u16 tclass, struct av_decision *avd);
105
106int security_transition_sid(u32 ssid, u32 tsid,
107 u16 tclass, u32 *out_sid);
108
109int security_transition_sid_user(u32 ssid, u32 tsid,
110 u16 tclass, u32 *out_sid);
111
112int security_member_sid(u32 ssid, u32 tsid,
113 u16 tclass, u32 *out_sid);
114
115int security_change_sid(u32 ssid, u32 tsid,
116 u16 tclass, u32 *out_sid);
117
118int security_sid_to_context(u32 sid, char **scontext,
119 u32 *scontext_len);
120
121int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
122
123int security_context_to_sid(const char *scontext, u32 scontext_len,
124 u32 *out_sid);
125
126int security_context_to_sid_default(const char *scontext, u32 scontext_len,
127 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
128
129int security_context_to_sid_force(const char *scontext, u32 scontext_len,
130 u32 *sid);
131
132int security_get_user_sids(u32 callsid, char *username,
133 u32 **sids, u32 *nel);
134
135int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
136
137int security_netif_sid(char *name, u32 *if_sid);
138
139int security_node_sid(u16 domain, void *addr, u32 addrlen,
140 u32 *out_sid);
141
142int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
143 u16 tclass);
144
145int security_bounded_transition(u32 oldsid, u32 newsid);
146
147int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
148
149int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
150 u32 xfrm_sid,
151 u32 *peer_sid);
152
153int security_get_classes(char ***classes, int *nclasses);
154int security_get_permissions(char *class, char ***perms, int *nperms);
155int security_get_reject_unknown(void);
156int 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
165int security_fs_use(const char *fstype, unsigned int *behavior,
166 u32 *sid);
167
168int security_genfs_sid(const char *fstype, char *name, u16 sclass,
169 u32 *sid);
170
171#ifdef CONFIG_NETLABEL
172int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
173 u32 *sid);
174
175int security_netlbl_sid_to_secattr(u32 sid,
176 struct netlbl_lsm_secattr *secattr);
177#else
178static inline int security_netlbl_secattr_to_sid(
179 struct netlbl_lsm_secattr *secattr,
180 u32 *sid)
181{
182 return -EIDRM;
183}
184
185static 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
192const char *security_get_initial_sid_context(u32 sid);
193
194#endif /* _SELINUX_SECURITY_H_ */
195