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_REDHAT1,
73 POLICYDB_CAPABILITY_ALWAYSNETWORK,
74 __POLICYDB_CAPABILITY_MAX
75};
76#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
77
78extern int selinux_policycap_netpeer;
79extern int selinux_policycap_openperm;
80extern int selinux_policycap_alwaysnetwork;
81
82/*
83 * type_datum properties
84 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
85 */
86#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
87#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
88
89/* limitation of boundary depth */
90#define POLICYDB_BOUNDS_MAXDEPTH 4
91
92int security_mls_enabled(void);
93
94int security_load_policy(void *data, size_t len);
95int security_read_policy(void **data, size_t *len);
96size_t security_policydb_len(void);
97
98int security_policycap_supported(unsigned int req_cap);
99
100#define SEL_VEC_MAX 32
101struct av_decision {
102 u32 allowed;
103 u32 auditallow;
104 u32 auditdeny;
105 u32 seqno;
106 u32 flags;
107};
108
109#define XPERMS_ALLOWED 1
110#define XPERMS_AUDITALLOW 2
111#define XPERMS_DONTAUDIT 4
112
113#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
114#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
115struct extended_perms_data {
116 u32 p[8];
117};
118
119struct extended_perms_decision {
120 u8 used;
121 u8 driver;
122 struct extended_perms_data *allowed;
123 struct extended_perms_data *auditallow;
124 struct extended_perms_data *dontaudit;
125};
126
127struct extended_perms {
128 u16 len; /* length associated decision chain */
129 struct extended_perms_data drivers; /* flag drivers that are used */
130};
131
132/* definitions of av_decision.flags */
133#define AVD_FLAGS_PERMISSIVE 0x0001
134
135void security_compute_av(u32 ssid, u32 tsid,
136 u16 tclass, struct av_decision *avd,
137 struct extended_perms *xperms);
138
139void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
140 u8 driver, struct extended_perms_decision *xpermd);
141
142void security_compute_av_user(u32 ssid, u32 tsid,
143 u16 tclass, struct av_decision *avd);
144
145int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
146 const struct qstr *qstr, u32 *out_sid);
147
148int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
149 const char *objname, u32 *out_sid);
150
151int security_member_sid(u32 ssid, u32 tsid,
152 u16 tclass, u32 *out_sid);
153
154int security_change_sid(u32 ssid, u32 tsid,
155 u16 tclass, u32 *out_sid);
156
157int security_sid_to_context(u32 sid, char **scontext,
158 u32 *scontext_len);
159
160int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
161
162int security_context_to_sid(const char *scontext, u32 scontext_len,
163 u32 *out_sid, gfp_t gfp);
164
165int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
166
167int security_context_to_sid_default(const char *scontext, u32 scontext_len,
168 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
169
170int security_context_to_sid_force(const char *scontext, u32 scontext_len,
171 u32 *sid);
172
173int security_get_user_sids(u32 callsid, char *username,
174 u32 **sids, u32 *nel);
175
176int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
177
178int security_netif_sid(char *name, u32 *if_sid);
179
180int security_node_sid(u16 domain, void *addr, u32 addrlen,
181 u32 *out_sid);
182
183int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
184 u16 tclass);
185
186int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid,
187 u16 tclass);
188
189int security_bounded_transition(u32 oldsid, u32 newsid);
190
191int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
192
193int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
194 u32 xfrm_sid,
195 u32 *peer_sid);
196
197int security_get_classes(char ***classes, int *nclasses);
198int security_get_permissions(char *class, char ***perms, int *nperms);
199int security_get_reject_unknown(void);
200int security_get_allow_unknown(void);
201
202#define SECURITY_FS_USE_XATTR 1 /* use xattr */
203#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
204#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
205#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
206#define SECURITY_FS_USE_NONE 5 /* no labeling support */
207#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
208#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
209#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
210
211int security_fs_use(struct super_block *sb);
212
213int security_genfs_sid(const char *fstype, char *name, u16 sclass,
214 u32 *sid);
215
216#ifdef CONFIG_NETLABEL
217int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
218 u32 *sid);
219
220int security_netlbl_sid_to_secattr(u32 sid,
221 struct netlbl_lsm_secattr *secattr);
222#else
223static inline int security_netlbl_secattr_to_sid(
224 struct netlbl_lsm_secattr *secattr,
225 u32 *sid)
226{
227 return -EIDRM;
228}
229
230static inline int security_netlbl_sid_to_secattr(u32 sid,
231 struct netlbl_lsm_secattr *secattr)
232{
233 return -ENOENT;
234}
235#endif /* CONFIG_NETLABEL */
236
237const char *security_get_initial_sid_context(u32 sid);
238
239/*
240 * status notifier using mmap interface
241 */
242extern struct page *selinux_kernel_status_page(void);
243
244#define SELINUX_KERNEL_STATUS_VERSION 1
245struct selinux_kernel_status {
246 u32 version; /* version number of thie structure */
247 u32 sequence; /* sequence number of seqlock logic */
248 u32 enforcing; /* current setting of enforcing mode */
249 u32 policyload; /* times of policy reloaded */
250 u32 deny_unknown; /* current setting of deny_unknown */
251 /*
252 * The version > 0 supports above members.
253 */
254} __packed;
255
256extern void selinux_status_update_setenforce(int enforcing);
257extern void selinux_status_update_policyload(int seqno);
258extern void selinux_complete_init(void);
259extern int selinux_disable(void);
260extern void exit_sel_fs(void);
261extern struct path selinux_null;
262extern struct vfsmount *selinuxfs_mount;
263extern void selnl_notify_setenforce(int val);
264extern void selnl_notify_policyload(u32 seqno);
265extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
266
267#endif /* _SELINUX_SECURITY_H_ */
268