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