Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Security server interface.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 *
7 */
8
9#ifndef _SELINUX_SECURITY_H_
10#define _SELINUX_SECURITY_H_
11
12#include <linux/compiler.h>
13#include <linux/dcache.h>
14#include <linux/magic.h>
15#include <linux/types.h>
16#include "flask.h"
17
18#define SECSID_NULL 0x00000000 /* unspecified SID */
19#define SECSID_WILD 0xffffffff /* wildcard SID */
20#define SECCLASS_NULL 0x0000 /* no class */
21
22/* Identify specific policy version changes */
23#define POLICYDB_VERSION_BASE 15
24#define POLICYDB_VERSION_BOOL 16
25#define POLICYDB_VERSION_IPV6 17
26#define POLICYDB_VERSION_NLCLASS 18
27#define POLICYDB_VERSION_VALIDATETRANS 19
28#define POLICYDB_VERSION_MLS 19
29#define POLICYDB_VERSION_AVTAB 20
30#define POLICYDB_VERSION_RANGETRANS 21
31#define POLICYDB_VERSION_POLCAP 22
32#define POLICYDB_VERSION_PERMISSIVE 23
33#define POLICYDB_VERSION_BOUNDARY 24
34#define POLICYDB_VERSION_FILENAME_TRANS 25
35#define POLICYDB_VERSION_ROLETRANS 26
36#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
37#define POLICYDB_VERSION_DEFAULT_TYPE 28
38#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
39#define POLICYDB_VERSION_XPERMS_IOCTL 30
40#define POLICYDB_VERSION_INFINIBAND 31
41
42/* Range of policy versions we understand*/
43#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
44#define POLICYDB_VERSION_MAX POLICYDB_VERSION_INFINIBAND
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#define SE_SBGENFS 0x0400
59
60#define CONTEXT_STR "context="
61#define FSCONTEXT_STR "fscontext="
62#define ROOTCONTEXT_STR "rootcontext="
63#define DEFCONTEXT_STR "defcontext="
64#define LABELSUPP_STR "seclabel"
65
66struct netlbl_lsm_secattr;
67
68extern int selinux_enabled;
69
70/* Policy capabilities */
71enum {
72 POLICYDB_CAPABILITY_NETPEER,
73 POLICYDB_CAPABILITY_OPENPERM,
74 POLICYDB_CAPABILITY_EXTSOCKCLASS,
75 POLICYDB_CAPABILITY_ALWAYSNETWORK,
76 POLICYDB_CAPABILITY_CGROUPSECLABEL,
77 POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION,
78 __POLICYDB_CAPABILITY_MAX
79};
80#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
81
82extern char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX];
83
84extern int selinux_policycap_netpeer;
85extern int selinux_policycap_openperm;
86extern int selinux_policycap_extsockclass;
87extern int selinux_policycap_alwaysnetwork;
88extern int selinux_policycap_cgroupseclabel;
89extern int selinux_policycap_nnp_nosuid_transition;
90
91/*
92 * type_datum properties
93 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
94 */
95#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
96#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
97
98/* limitation of boundary depth */
99#define POLICYDB_BOUNDS_MAXDEPTH 4
100
101int security_mls_enabled(void);
102
103int security_load_policy(void *data, size_t len);
104int security_read_policy(void **data, size_t *len);
105size_t security_policydb_len(void);
106
107int security_policycap_supported(unsigned int req_cap);
108
109#define SEL_VEC_MAX 32
110struct av_decision {
111 u32 allowed;
112 u32 auditallow;
113 u32 auditdeny;
114 u32 seqno;
115 u32 flags;
116};
117
118#define XPERMS_ALLOWED 1
119#define XPERMS_AUDITALLOW 2
120#define XPERMS_DONTAUDIT 4
121
122#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
123#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
124struct extended_perms_data {
125 u32 p[8];
126};
127
128struct extended_perms_decision {
129 u8 used;
130 u8 driver;
131 struct extended_perms_data *allowed;
132 struct extended_perms_data *auditallow;
133 struct extended_perms_data *dontaudit;
134};
135
136struct extended_perms {
137 u16 len; /* length associated decision chain */
138 struct extended_perms_data drivers; /* flag drivers that are used */
139};
140
141/* definitions of av_decision.flags */
142#define AVD_FLAGS_PERMISSIVE 0x0001
143
144void security_compute_av(u32 ssid, u32 tsid,
145 u16 tclass, struct av_decision *avd,
146 struct extended_perms *xperms);
147
148void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
149 u8 driver, struct extended_perms_decision *xpermd);
150
151void security_compute_av_user(u32 ssid, u32 tsid,
152 u16 tclass, struct av_decision *avd);
153
154int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
155 const struct qstr *qstr, u32 *out_sid);
156
157int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
158 const char *objname, u32 *out_sid);
159
160int security_member_sid(u32 ssid, u32 tsid,
161 u16 tclass, u32 *out_sid);
162
163int security_change_sid(u32 ssid, u32 tsid,
164 u16 tclass, u32 *out_sid);
165
166int security_sid_to_context(u32 sid, char **scontext,
167 u32 *scontext_len);
168
169int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
170
171int security_context_to_sid(const char *scontext, u32 scontext_len,
172 u32 *out_sid, gfp_t gfp);
173
174int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
175
176int security_context_to_sid_default(const char *scontext, u32 scontext_len,
177 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
178
179int security_context_to_sid_force(const char *scontext, u32 scontext_len,
180 u32 *sid);
181
182int security_get_user_sids(u32 callsid, char *username,
183 u32 **sids, u32 *nel);
184
185int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
186
187int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
188
189int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid);
190
191int security_netif_sid(char *name, u32 *if_sid);
192
193int security_node_sid(u16 domain, void *addr, u32 addrlen,
194 u32 *out_sid);
195
196int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
197 u16 tclass);
198
199int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid,
200 u16 tclass);
201
202int security_bounded_transition(u32 oldsid, u32 newsid);
203
204int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
205
206int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
207 u32 xfrm_sid,
208 u32 *peer_sid);
209
210int security_get_classes(char ***classes, int *nclasses);
211int security_get_permissions(char *class, char ***perms, int *nperms);
212int security_get_reject_unknown(void);
213int security_get_allow_unknown(void);
214
215#define SECURITY_FS_USE_XATTR 1 /* use xattr */
216#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
217#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
218#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
219#define SECURITY_FS_USE_NONE 5 /* no labeling support */
220#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
221#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
222#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
223
224int security_fs_use(struct super_block *sb);
225
226int security_genfs_sid(const char *fstype, char *name, u16 sclass,
227 u32 *sid);
228
229#ifdef CONFIG_NETLABEL
230int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
231 u32 *sid);
232
233int security_netlbl_sid_to_secattr(u32 sid,
234 struct netlbl_lsm_secattr *secattr);
235#else
236static inline int security_netlbl_secattr_to_sid(
237 struct netlbl_lsm_secattr *secattr,
238 u32 *sid)
239{
240 return -EIDRM;
241}
242
243static inline int security_netlbl_sid_to_secattr(u32 sid,
244 struct netlbl_lsm_secattr *secattr)
245{
246 return -ENOENT;
247}
248#endif /* CONFIG_NETLABEL */
249
250const char *security_get_initial_sid_context(u32 sid);
251
252/*
253 * status notifier using mmap interface
254 */
255extern struct page *selinux_kernel_status_page(void);
256
257#define SELINUX_KERNEL_STATUS_VERSION 1
258struct selinux_kernel_status {
259 u32 version; /* version number of thie structure */
260 u32 sequence; /* sequence number of seqlock logic */
261 u32 enforcing; /* current setting of enforcing mode */
262 u32 policyload; /* times of policy reloaded */
263 u32 deny_unknown; /* current setting of deny_unknown */
264 /*
265 * The version > 0 supports above members.
266 */
267} __packed;
268
269extern void selinux_status_update_setenforce(int enforcing);
270extern void selinux_status_update_policyload(int seqno);
271extern void selinux_complete_init(void);
272extern int selinux_disable(void);
273extern void exit_sel_fs(void);
274extern struct path selinux_null;
275extern struct vfsmount *selinuxfs_mount;
276extern void selnl_notify_setenforce(int val);
277extern void selnl_notify_policyload(u32 seqno);
278extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
279
280#endif /* _SELINUX_SECURITY_H_ */
281