Linux kernel mirror (for testing)
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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/compiler.h>
12#include <linux/dcache.h>
13#include <linux/magic.h>
14#include <linux/types.h>
15#include "flask.h"
16
17#define SECSID_NULL 0x00000000 /* unspecified SID */
18#define SECSID_WILD 0xffffffff /* wildcard SID */
19#define SECCLASS_NULL 0x0000 /* no class */
20
21/* Identify specific policy version changes */
22#define POLICYDB_VERSION_BASE 15
23#define POLICYDB_VERSION_BOOL 16
24#define POLICYDB_VERSION_IPV6 17
25#define POLICYDB_VERSION_NLCLASS 18
26#define POLICYDB_VERSION_VALIDATETRANS 19
27#define POLICYDB_VERSION_MLS 19
28#define POLICYDB_VERSION_AVTAB 20
29#define POLICYDB_VERSION_RANGETRANS 21
30#define POLICYDB_VERSION_POLCAP 22
31#define POLICYDB_VERSION_PERMISSIVE 23
32#define POLICYDB_VERSION_BOUNDARY 24
33#define POLICYDB_VERSION_FILENAME_TRANS 25
34#define POLICYDB_VERSION_ROLETRANS 26
35#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
36#define POLICYDB_VERSION_DEFAULT_TYPE 28
37#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
38
39/* Range of policy versions we understand*/
40#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
41#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
42#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
43#else
44#define POLICYDB_VERSION_MAX POLICYDB_VERSION_CONSTRAINT_NAMES
45#endif
46
47/* Mask for just the mount related flags */
48#define SE_MNTMASK 0x0f
49/* Super block security struct flags for mount options */
50/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
51#define CONTEXT_MNT 0x01
52#define FSCONTEXT_MNT 0x02
53#define ROOTCONTEXT_MNT 0x04
54#define DEFCONTEXT_MNT 0x08
55#define SBLABEL_MNT 0x10
56/* Non-mount related flags */
57#define SE_SBINITIALIZED 0x0100
58#define SE_SBPROC 0x0200
59#define SE_SBGENFS 0x0400
60
61#define CONTEXT_STR "context="
62#define FSCONTEXT_STR "fscontext="
63#define ROOTCONTEXT_STR "rootcontext="
64#define DEFCONTEXT_STR "defcontext="
65#define LABELSUPP_STR "seclabel"
66
67struct netlbl_lsm_secattr;
68
69extern int selinux_enabled;
70
71/* Policy capabilities */
72enum {
73 POLICYDB_CAPABILITY_NETPEER,
74 POLICYDB_CAPABILITY_OPENPERM,
75 POLICYDB_CAPABILITY_REDHAT1,
76 POLICYDB_CAPABILITY_ALWAYSNETWORK,
77 __POLICYDB_CAPABILITY_MAX
78};
79#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
80
81extern int selinux_policycap_netpeer;
82extern int selinux_policycap_openperm;
83extern int selinux_policycap_alwaysnetwork;
84
85/*
86 * type_datum properties
87 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
88 */
89#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
90#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
91
92/* limitation of boundary depth */
93#define POLICYDB_BOUNDS_MAXDEPTH 4
94
95int security_mls_enabled(void);
96
97int security_load_policy(void *data, size_t len);
98int security_read_policy(void **data, size_t *len);
99size_t security_policydb_len(void);
100
101int security_policycap_supported(unsigned int req_cap);
102
103#define SEL_VEC_MAX 32
104struct av_decision {
105 u32 allowed;
106 u32 auditallow;
107 u32 auditdeny;
108 u32 seqno;
109 u32 flags;
110};
111
112/* definitions of av_decision.flags */
113#define AVD_FLAGS_PERMISSIVE 0x0001
114
115void security_compute_av(u32 ssid, u32 tsid,
116 u16 tclass, struct av_decision *avd);
117
118void security_compute_av_user(u32 ssid, u32 tsid,
119 u16 tclass, struct av_decision *avd);
120
121int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
122 const struct qstr *qstr, u32 *out_sid);
123
124int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
125 const char *objname, u32 *out_sid);
126
127int security_member_sid(u32 ssid, u32 tsid,
128 u16 tclass, u32 *out_sid);
129
130int security_change_sid(u32 ssid, u32 tsid,
131 u16 tclass, u32 *out_sid);
132
133int security_sid_to_context(u32 sid, char **scontext,
134 u32 *scontext_len);
135
136int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
137
138int security_context_to_sid(const char *scontext, u32 scontext_len,
139 u32 *out_sid, gfp_t gfp);
140
141int security_context_to_sid_default(const char *scontext, u32 scontext_len,
142 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
143
144int security_context_to_sid_force(const char *scontext, u32 scontext_len,
145 u32 *sid);
146
147int security_get_user_sids(u32 callsid, char *username,
148 u32 **sids, u32 *nel);
149
150int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
151
152int security_netif_sid(char *name, u32 *if_sid);
153
154int security_node_sid(u16 domain, void *addr, u32 addrlen,
155 u32 *out_sid);
156
157int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
158 u16 tclass);
159
160int security_bounded_transition(u32 oldsid, u32 newsid);
161
162int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
163
164int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
165 u32 xfrm_sid,
166 u32 *peer_sid);
167
168int security_get_classes(char ***classes, int *nclasses);
169int security_get_permissions(char *class, char ***perms, int *nperms);
170int security_get_reject_unknown(void);
171int security_get_allow_unknown(void);
172
173#define SECURITY_FS_USE_XATTR 1 /* use xattr */
174#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
175#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
176#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
177#define SECURITY_FS_USE_NONE 5 /* no labeling support */
178#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
179#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
180#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
181
182int security_fs_use(struct super_block *sb);
183
184int security_genfs_sid(const char *fstype, char *name, u16 sclass,
185 u32 *sid);
186
187#ifdef CONFIG_NETLABEL
188int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
189 u32 *sid);
190
191int security_netlbl_sid_to_secattr(u32 sid,
192 struct netlbl_lsm_secattr *secattr);
193#else
194static inline int security_netlbl_secattr_to_sid(
195 struct netlbl_lsm_secattr *secattr,
196 u32 *sid)
197{
198 return -EIDRM;
199}
200
201static inline int security_netlbl_sid_to_secattr(u32 sid,
202 struct netlbl_lsm_secattr *secattr)
203{
204 return -ENOENT;
205}
206#endif /* CONFIG_NETLABEL */
207
208const char *security_get_initial_sid_context(u32 sid);
209
210/*
211 * status notifier using mmap interface
212 */
213extern struct page *selinux_kernel_status_page(void);
214
215#define SELINUX_KERNEL_STATUS_VERSION 1
216struct selinux_kernel_status {
217 u32 version; /* version number of thie structure */
218 u32 sequence; /* sequence number of seqlock logic */
219 u32 enforcing; /* current setting of enforcing mode */
220 u32 policyload; /* times of policy reloaded */
221 u32 deny_unknown; /* current setting of deny_unknown */
222 /*
223 * The version > 0 supports above members.
224 */
225} __packed;
226
227extern void selinux_status_update_setenforce(int enforcing);
228extern void selinux_status_update_policyload(int seqno);
229extern void selinux_complete_init(void);
230extern int selinux_disable(void);
231extern void exit_sel_fs(void);
232extern struct path selinux_null;
233extern struct vfsmount *selinuxfs_mount;
234extern void selnl_notify_setenforce(int val);
235extern void selnl_notify_policyload(u32 seqno);
236extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
237
238#endif /* _SELINUX_SECURITY_H_ */
239