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#define POLICYDB_VERSION_XPERMS_IOCTL 30
39
40/* Range of policy versions we understand*/
41#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
42#define POLICYDB_VERSION_MAX POLICYDB_VERSION_XPERMS_IOCTL
43
44/* Mask for just the mount related flags */
45#define SE_MNTMASK 0x0f
46/* Super block security struct flags for mount options */
47/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
48#define CONTEXT_MNT 0x01
49#define FSCONTEXT_MNT 0x02
50#define ROOTCONTEXT_MNT 0x04
51#define DEFCONTEXT_MNT 0x08
52#define SBLABEL_MNT 0x10
53/* Non-mount related flags */
54#define SE_SBINITIALIZED 0x0100
55#define SE_SBPROC 0x0200
56#define SE_SBGENFS 0x0400
57
58#define CONTEXT_STR "context="
59#define FSCONTEXT_STR "fscontext="
60#define ROOTCONTEXT_STR "rootcontext="
61#define DEFCONTEXT_STR "defcontext="
62#define LABELSUPP_STR "seclabel"
63
64struct netlbl_lsm_secattr;
65
66extern int selinux_enabled;
67
68/* Policy capabilities */
69enum {
70 POLICYDB_CAPABILITY_NETPEER,
71 POLICYDB_CAPABILITY_OPENPERM,
72 POLICYDB_CAPABILITY_EXTSOCKCLASS,
73 POLICYDB_CAPABILITY_ALWAYSNETWORK,
74 POLICYDB_CAPABILITY_CGROUPSECLABEL,
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_extsockclass;
82extern int selinux_policycap_alwaysnetwork;
83extern int selinux_policycap_cgroupseclabel;
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#define XPERMS_ALLOWED 1
113#define XPERMS_AUDITALLOW 2
114#define XPERMS_DONTAUDIT 4
115
116#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
117#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
118struct extended_perms_data {
119 u32 p[8];
120};
121
122struct extended_perms_decision {
123 u8 used;
124 u8 driver;
125 struct extended_perms_data *allowed;
126 struct extended_perms_data *auditallow;
127 struct extended_perms_data *dontaudit;
128};
129
130struct extended_perms {
131 u16 len; /* length associated decision chain */
132 struct extended_perms_data drivers; /* flag drivers that are used */
133};
134
135/* definitions of av_decision.flags */
136#define AVD_FLAGS_PERMISSIVE 0x0001
137
138void security_compute_av(u32 ssid, u32 tsid,
139 u16 tclass, struct av_decision *avd,
140 struct extended_perms *xperms);
141
142void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
143 u8 driver, struct extended_perms_decision *xpermd);
144
145void security_compute_av_user(u32 ssid, u32 tsid,
146 u16 tclass, struct av_decision *avd);
147
148int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
149 const struct qstr *qstr, u32 *out_sid);
150
151int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
152 const char *objname, u32 *out_sid);
153
154int security_member_sid(u32 ssid, u32 tsid,
155 u16 tclass, u32 *out_sid);
156
157int security_change_sid(u32 ssid, u32 tsid,
158 u16 tclass, u32 *out_sid);
159
160int security_sid_to_context(u32 sid, char **scontext,
161 u32 *scontext_len);
162
163int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
164
165int security_context_to_sid(const char *scontext, u32 scontext_len,
166 u32 *out_sid, gfp_t gfp);
167
168int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
169
170int security_context_to_sid_default(const char *scontext, u32 scontext_len,
171 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
172
173int security_context_to_sid_force(const char *scontext, u32 scontext_len,
174 u32 *sid);
175
176int security_get_user_sids(u32 callsid, char *username,
177 u32 **sids, u32 *nel);
178
179int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
180
181int security_netif_sid(char *name, u32 *if_sid);
182
183int security_node_sid(u16 domain, void *addr, u32 addrlen,
184 u32 *out_sid);
185
186int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
187 u16 tclass);
188
189int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid,
190 u16 tclass);
191
192int security_bounded_transition(u32 oldsid, u32 newsid);
193
194int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
195
196int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
197 u32 xfrm_sid,
198 u32 *peer_sid);
199
200int security_get_classes(char ***classes, int *nclasses);
201int security_get_permissions(char *class, char ***perms, int *nperms);
202int security_get_reject_unknown(void);
203int security_get_allow_unknown(void);
204
205#define SECURITY_FS_USE_XATTR 1 /* use xattr */
206#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
207#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
208#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
209#define SECURITY_FS_USE_NONE 5 /* no labeling support */
210#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
211#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
212#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
213
214int security_fs_use(struct super_block *sb);
215
216int security_genfs_sid(const char *fstype, char *name, u16 sclass,
217 u32 *sid);
218
219#ifdef CONFIG_NETLABEL
220int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
221 u32 *sid);
222
223int security_netlbl_sid_to_secattr(u32 sid,
224 struct netlbl_lsm_secattr *secattr);
225#else
226static inline int security_netlbl_secattr_to_sid(
227 struct netlbl_lsm_secattr *secattr,
228 u32 *sid)
229{
230 return -EIDRM;
231}
232
233static inline int security_netlbl_sid_to_secattr(u32 sid,
234 struct netlbl_lsm_secattr *secattr)
235{
236 return -ENOENT;
237}
238#endif /* CONFIG_NETLABEL */
239
240const char *security_get_initial_sid_context(u32 sid);
241
242/*
243 * status notifier using mmap interface
244 */
245extern struct page *selinux_kernel_status_page(void);
246
247#define SELINUX_KERNEL_STATUS_VERSION 1
248struct selinux_kernel_status {
249 u32 version; /* version number of thie structure */
250 u32 sequence; /* sequence number of seqlock logic */
251 u32 enforcing; /* current setting of enforcing mode */
252 u32 policyload; /* times of policy reloaded */
253 u32 deny_unknown; /* current setting of deny_unknown */
254 /*
255 * The version > 0 supports above members.
256 */
257} __packed;
258
259extern void selinux_status_update_setenforce(int enforcing);
260extern void selinux_status_update_policyload(int seqno);
261extern void selinux_complete_init(void);
262extern int selinux_disable(void);
263extern void exit_sel_fs(void);
264extern struct path selinux_null;
265extern struct vfsmount *selinuxfs_mount;
266extern void selnl_notify_setenforce(int val);
267extern void selnl_notify_policyload(u32 seqno);
268extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
269
270#endif /* _SELINUX_SECURITY_H_ */
271