Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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/dcache.h>
12#include <linux/magic.h>
13#include <linux/types.h>
14#include "flask.h"
15
16#define SECSID_NULL 0x00000000 /* unspecified SID */
17#define SECSID_WILD 0xffffffff /* wildcard SID */
18#define SECCLASS_NULL 0x0000 /* no class */
19
20/* Identify specific policy version changes */
21#define POLICYDB_VERSION_BASE 15
22#define POLICYDB_VERSION_BOOL 16
23#define POLICYDB_VERSION_IPV6 17
24#define POLICYDB_VERSION_NLCLASS 18
25#define POLICYDB_VERSION_VALIDATETRANS 19
26#define POLICYDB_VERSION_MLS 19
27#define POLICYDB_VERSION_AVTAB 20
28#define POLICYDB_VERSION_RANGETRANS 21
29#define POLICYDB_VERSION_POLCAP 22
30#define POLICYDB_VERSION_PERMISSIVE 23
31#define POLICYDB_VERSION_BOUNDARY 24
32#define POLICYDB_VERSION_FILENAME_TRANS 25
33
34/* Range of policy versions we understand*/
35#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
36#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
37#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
38#else
39#define POLICYDB_VERSION_MAX POLICYDB_VERSION_FILENAME_TRANS
40#endif
41
42/* Mask for just the mount related flags */
43#define SE_MNTMASK 0x0f
44/* Super block security struct flags for mount options */
45#define CONTEXT_MNT 0x01
46#define FSCONTEXT_MNT 0x02
47#define ROOTCONTEXT_MNT 0x04
48#define DEFCONTEXT_MNT 0x08
49/* Non-mount related flags */
50#define SE_SBINITIALIZED 0x10
51#define SE_SBPROC 0x20
52#define SE_SBLABELSUPP 0x40
53
54#define CONTEXT_STR "context="
55#define FSCONTEXT_STR "fscontext="
56#define ROOTCONTEXT_STR "rootcontext="
57#define DEFCONTEXT_STR "defcontext="
58#define LABELSUPP_STR "seclabel"
59
60struct netlbl_lsm_secattr;
61
62extern int selinux_enabled;
63
64/* Policy capabilities */
65enum {
66 POLICYDB_CAPABILITY_NETPEER,
67 POLICYDB_CAPABILITY_OPENPERM,
68 __POLICYDB_CAPABILITY_MAX
69};
70#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
71
72extern int selinux_policycap_netpeer;
73extern int selinux_policycap_openperm;
74
75/*
76 * type_datum properties
77 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
78 */
79#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
80#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
81
82/* limitation of boundary depth */
83#define POLICYDB_BOUNDS_MAXDEPTH 4
84
85int security_mls_enabled(void);
86
87int security_load_policy(void *data, size_t len);
88int security_read_policy(void **data, ssize_t *len);
89size_t security_policydb_len(void);
90
91int security_policycap_supported(unsigned int req_cap);
92
93#define SEL_VEC_MAX 32
94struct av_decision {
95 u32 allowed;
96 u32 auditallow;
97 u32 auditdeny;
98 u32 seqno;
99 u32 flags;
100};
101
102/* definitions of av_decision.flags */
103#define AVD_FLAGS_PERMISSIVE 0x0001
104
105void security_compute_av(u32 ssid, u32 tsid,
106 u16 tclass, struct av_decision *avd);
107
108void security_compute_av_user(u32 ssid, u32 tsid,
109 u16 tclass, struct av_decision *avd);
110
111int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
112 const struct qstr *qstr, u32 *out_sid);
113
114int security_transition_sid_user(u32 ssid, u32 tsid,
115 u16 tclass, u32 *out_sid);
116
117int security_member_sid(u32 ssid, u32 tsid,
118 u16 tclass, u32 *out_sid);
119
120int security_change_sid(u32 ssid, u32 tsid,
121 u16 tclass, u32 *out_sid);
122
123int security_sid_to_context(u32 sid, char **scontext,
124 u32 *scontext_len);
125
126int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
127
128int security_context_to_sid(const char *scontext, u32 scontext_len,
129 u32 *out_sid);
130
131int security_context_to_sid_default(const char *scontext, u32 scontext_len,
132 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
133
134int security_context_to_sid_force(const char *scontext, u32 scontext_len,
135 u32 *sid);
136
137int security_get_user_sids(u32 callsid, char *username,
138 u32 **sids, u32 *nel);
139
140int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
141
142int security_netif_sid(char *name, u32 *if_sid);
143
144int security_node_sid(u16 domain, void *addr, u32 addrlen,
145 u32 *out_sid);
146
147int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
148 u16 tclass);
149
150int security_bounded_transition(u32 oldsid, u32 newsid);
151
152int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
153
154int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
155 u32 xfrm_sid,
156 u32 *peer_sid);
157
158int security_get_classes(char ***classes, int *nclasses);
159int security_get_permissions(char *class, char ***perms, int *nperms);
160int security_get_reject_unknown(void);
161int security_get_allow_unknown(void);
162
163#define SECURITY_FS_USE_XATTR 1 /* use xattr */
164#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
165#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
166#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
167#define SECURITY_FS_USE_NONE 5 /* no labeling support */
168#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
169
170int security_fs_use(const char *fstype, unsigned int *behavior,
171 u32 *sid);
172
173int security_genfs_sid(const char *fstype, char *name, u16 sclass,
174 u32 *sid);
175
176#ifdef CONFIG_NETLABEL
177int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
178 u32 *sid);
179
180int security_netlbl_sid_to_secattr(u32 sid,
181 struct netlbl_lsm_secattr *secattr);
182#else
183static inline int security_netlbl_secattr_to_sid(
184 struct netlbl_lsm_secattr *secattr,
185 u32 *sid)
186{
187 return -EIDRM;
188}
189
190static inline int security_netlbl_sid_to_secattr(u32 sid,
191 struct netlbl_lsm_secattr *secattr)
192{
193 return -ENOENT;
194}
195#endif /* CONFIG_NETLABEL */
196
197const char *security_get_initial_sid_context(u32 sid);
198
199/*
200 * status notifier using mmap interface
201 */
202extern struct page *selinux_kernel_status_page(void);
203
204#define SELINUX_KERNEL_STATUS_VERSION 1
205struct selinux_kernel_status {
206 u32 version; /* version number of thie structure */
207 u32 sequence; /* sequence number of seqlock logic */
208 u32 enforcing; /* current setting of enforcing mode */
209 u32 policyload; /* times of policy reloaded */
210 u32 deny_unknown; /* current setting of deny_unknown */
211 /*
212 * The version > 0 supports above members.
213 */
214} __attribute__((packed));
215
216extern void selinux_status_update_setenforce(int enforcing);
217extern void selinux_status_update_policyload(int seqno);
218
219#endif /* _SELINUX_SECURITY_H_ */
220