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#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
43#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
44#else
45#define POLICYDB_VERSION_MAX POLICYDB_VERSION_XPERMS_IOCTL
46#endif
47
48/* Mask for just the mount related flags */
49#define SE_MNTMASK 0x0f
50/* Super block security struct flags for mount options */
51/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
52#define CONTEXT_MNT 0x01
53#define FSCONTEXT_MNT 0x02
54#define ROOTCONTEXT_MNT 0x04
55#define DEFCONTEXT_MNT 0x08
56#define SBLABEL_MNT 0x10
57/* Non-mount related flags */
58#define SE_SBINITIALIZED 0x0100
59#define SE_SBPROC 0x0200
60#define SE_SBGENFS 0x0400
61
62#define CONTEXT_STR "context="
63#define FSCONTEXT_STR "fscontext="
64#define ROOTCONTEXT_STR "rootcontext="
65#define DEFCONTEXT_STR "defcontext="
66#define LABELSUPP_STR "seclabel"
67
68struct netlbl_lsm_secattr;
69
70extern int selinux_enabled;
71
72/* Policy capabilities */
73enum {
74 POLICYDB_CAPABILITY_NETPEER,
75 POLICYDB_CAPABILITY_OPENPERM,
76 POLICYDB_CAPABILITY_REDHAT1,
77 POLICYDB_CAPABILITY_ALWAYSNETWORK,
78 __POLICYDB_CAPABILITY_MAX
79};
80#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
81
82extern int selinux_policycap_netpeer;
83extern int selinux_policycap_openperm;
84extern int selinux_policycap_alwaysnetwork;
85
86/*
87 * type_datum properties
88 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
89 */
90#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
91#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
92
93/* limitation of boundary depth */
94#define POLICYDB_BOUNDS_MAXDEPTH 4
95
96int security_mls_enabled(void);
97
98int security_load_policy(void *data, size_t len);
99int security_read_policy(void **data, size_t *len);
100size_t security_policydb_len(void);
101
102int security_policycap_supported(unsigned int req_cap);
103
104#define SEL_VEC_MAX 32
105struct av_decision {
106 u32 allowed;
107 u32 auditallow;
108 u32 auditdeny;
109 u32 seqno;
110 u32 flags;
111};
112
113#define XPERMS_ALLOWED 1
114#define XPERMS_AUDITALLOW 2
115#define XPERMS_DONTAUDIT 4
116
117#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
118#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
119struct extended_perms_data {
120 u32 p[8];
121};
122
123struct extended_perms_decision {
124 u8 used;
125 u8 driver;
126 struct extended_perms_data *allowed;
127 struct extended_perms_data *auditallow;
128 struct extended_perms_data *dontaudit;
129};
130
131struct extended_perms {
132 u16 len; /* length associated decision chain */
133 struct extended_perms_data drivers; /* flag drivers that are used */
134};
135
136/* definitions of av_decision.flags */
137#define AVD_FLAGS_PERMISSIVE 0x0001
138
139void security_compute_av(u32 ssid, u32 tsid,
140 u16 tclass, struct av_decision *avd,
141 struct extended_perms *xperms);
142
143void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
144 u8 driver, struct extended_perms_decision *xpermd);
145
146void security_compute_av_user(u32 ssid, u32 tsid,
147 u16 tclass, struct av_decision *avd);
148
149int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
150 const struct qstr *qstr, u32 *out_sid);
151
152int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
153 const char *objname, u32 *out_sid);
154
155int security_member_sid(u32 ssid, u32 tsid,
156 u16 tclass, u32 *out_sid);
157
158int security_change_sid(u32 ssid, u32 tsid,
159 u16 tclass, u32 *out_sid);
160
161int security_sid_to_context(u32 sid, char **scontext,
162 u32 *scontext_len);
163
164int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
165
166int security_context_to_sid(const char *scontext, u32 scontext_len,
167 u32 *out_sid, gfp_t gfp);
168
169int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
170
171int security_context_to_sid_default(const char *scontext, u32 scontext_len,
172 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
173
174int security_context_to_sid_force(const char *scontext, u32 scontext_len,
175 u32 *sid);
176
177int security_get_user_sids(u32 callsid, char *username,
178 u32 **sids, u32 *nel);
179
180int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
181
182int security_netif_sid(char *name, u32 *if_sid);
183
184int security_node_sid(u16 domain, void *addr, u32 addrlen,
185 u32 *out_sid);
186
187int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
188 u16 tclass);
189
190int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid,
191 u16 tclass);
192
193int security_bounded_transition(u32 oldsid, u32 newsid);
194
195int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
196
197int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
198 u32 xfrm_sid,
199 u32 *peer_sid);
200
201int security_get_classes(char ***classes, int *nclasses);
202int security_get_permissions(char *class, char ***perms, int *nperms);
203int security_get_reject_unknown(void);
204int security_get_allow_unknown(void);
205
206#define SECURITY_FS_USE_XATTR 1 /* use xattr */
207#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
208#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
209#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
210#define SECURITY_FS_USE_NONE 5 /* no labeling support */
211#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
212#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
213#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
214
215int security_fs_use(struct super_block *sb);
216
217int security_genfs_sid(const char *fstype, char *name, u16 sclass,
218 u32 *sid);
219
220#ifdef CONFIG_NETLABEL
221int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
222 u32 *sid);
223
224int security_netlbl_sid_to_secattr(u32 sid,
225 struct netlbl_lsm_secattr *secattr);
226#else
227static inline int security_netlbl_secattr_to_sid(
228 struct netlbl_lsm_secattr *secattr,
229 u32 *sid)
230{
231 return -EIDRM;
232}
233
234static inline int security_netlbl_sid_to_secattr(u32 sid,
235 struct netlbl_lsm_secattr *secattr)
236{
237 return -ENOENT;
238}
239#endif /* CONFIG_NETLABEL */
240
241const char *security_get_initial_sid_context(u32 sid);
242
243/*
244 * status notifier using mmap interface
245 */
246extern struct page *selinux_kernel_status_page(void);
247
248#define SELINUX_KERNEL_STATUS_VERSION 1
249struct selinux_kernel_status {
250 u32 version; /* version number of thie structure */
251 u32 sequence; /* sequence number of seqlock logic */
252 u32 enforcing; /* current setting of enforcing mode */
253 u32 policyload; /* times of policy reloaded */
254 u32 deny_unknown; /* current setting of deny_unknown */
255 /*
256 * The version > 0 supports above members.
257 */
258} __packed;
259
260extern void selinux_status_update_setenforce(int enforcing);
261extern void selinux_status_update_policyload(int seqno);
262extern void selinux_complete_init(void);
263extern int selinux_disable(void);
264extern void exit_sel_fs(void);
265extern struct path selinux_null;
266extern struct vfsmount *selinuxfs_mount;
267extern void selnl_notify_setenforce(int val);
268extern void selnl_notify_policyload(u32 seqno);
269extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
270
271#endif /* _SELINUX_SECURITY_H_ */
272