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 #define POLICYDB_VERSION_XPERMS_IOCTL 30
38
39 /* Range of policy versions we understand*/
40 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
41 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
42 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
43 #else
44 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_XPERMS_IOCTL
45 #endif
46
47 /* Mask for just the mount related flags */
48 #define SE_MNTMASK 0x0f
49 /* Super block security struct flags for mount options */
50 #define CONTEXT_MNT 0x01
51 #define FSCONTEXT_MNT 0x02
52 #define ROOTCONTEXT_MNT 0x04
53 #define DEFCONTEXT_MNT 0x08
54 /* Non-mount related flags */
55 #define SE_SBINITIALIZED 0x10
56 #define SE_SBPROC 0x20
57 #define SE_SBLABELSUPP 0x40
58 #define SE_SBGENFS 0x80
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
66 struct netlbl_lsm_secattr;
67
68 extern int selinux_enabled;
69
70 /* Policy capabilities */
71 enum {
72 POLICYDB_CAPABILITY_NETPEER,
73 POLICYDB_CAPABILITY_OPENPERM,
74 __POLICYDB_CAPABILITY_MAX
75 };
76 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
77
78 extern int selinux_policycap_netpeer;
79 extern int selinux_policycap_openperm;
80
81 /*
82 * type_datum properties
83 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
84 */
85 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001
86 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
87
88 /* limitation of boundary depth */
89 #define POLICYDB_BOUNDS_MAXDEPTH 4
90
91 int security_mls_enabled(void);
92
93 int security_load_policy(void *data, size_t len);
94 int security_read_policy(void **data, size_t *len);
95 size_t security_policydb_len(void);
96
97 int security_policycap_supported(unsigned int req_cap);
98
99 #define SEL_VEC_MAX 32
100 struct av_decision {
101 u32 allowed;
102 u32 auditallow;
103 u32 auditdeny;
104 u32 seqno;
105 u32 flags;
106 };
107
108 #define XPERMS_ALLOWED 1
109 #define XPERMS_AUDITALLOW 2
110 #define XPERMS_DONTAUDIT 4
111
112 #define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
113 #define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
114 struct extended_perms_data {
115 u32 p[8];
116 };
117
118 struct extended_perms_decision {
119 u8 used;
120 u8 driver;
121 struct extended_perms_data *allowed;
122 struct extended_perms_data *auditallow;
123 struct extended_perms_data *dontaudit;
124 };
125
126 struct extended_perms {
127 u16 len; /* length associated decision chain */
128 struct extended_perms_data drivers; /* flag drivers that are used */
129 };
130
131 /* definitions of av_decision.flags */
132 #define AVD_FLAGS_PERMISSIVE 0x0001
133
134 void security_compute_av(u32 ssid, u32 tsid,
135 u16 tclass, struct av_decision *avd,
136 struct extended_perms *xperms);
137
138 void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
139 u8 driver, struct extended_perms_decision *xpermd);
140
141 void security_compute_av_user(u32 ssid, u32 tsid,
142 u16 tclass, struct av_decision *avd);
143
144 int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
145 const struct qstr *qstr, u32 *out_sid);
146
147 int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
148 const char *objname, u32 *out_sid);
149
150 int security_member_sid(u32 ssid, u32 tsid,
151 u16 tclass, u32 *out_sid);
152
153 int security_change_sid(u32 ssid, u32 tsid,
154 u16 tclass, u32 *out_sid);
155
156 int security_sid_to_context(u32 sid, char **scontext,
157 u32 *scontext_len);
158
159 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
160
161 int security_context_to_sid(const char *scontext, u32 scontext_len,
162 u32 *out_sid);
163
164 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
165 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
166
167 int security_context_to_sid_force(const char *scontext, u32 scontext_len,
168 u32 *sid);
169
170 int security_get_user_sids(u32 callsid, char *username,
171 u32 **sids, u32 *nel);
172
173 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
174
175 int security_netif_sid(char *name, u32 *if_sid);
176
177 int security_node_sid(u16 domain, void *addr, u32 addrlen,
178 u32 *out_sid);
179
180 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
181 u16 tclass);
182
183 int security_bounded_transition(u32 oldsid, u32 newsid);
184
185 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
186
187 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
188 u32 xfrm_sid,
189 u32 *peer_sid);
190
191 int security_get_classes(char ***classes, int *nclasses);
192 int security_get_permissions(char *class, char ***perms, int *nperms);
193 int security_get_reject_unknown(void);
194 int security_get_allow_unknown(void);
195
196 #define SECURITY_FS_USE_XATTR 1 /* use xattr */
197 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
198 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
199 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
200 #define SECURITY_FS_USE_NONE 5 /* no labeling support */
201 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
202
203 int security_fs_use(const char *fstype, unsigned int *behavior,
204 u32 *sid);
205
206 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
207 u32 *sid);
208
209 #ifdef CONFIG_NETLABEL
210 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
211 u32 *sid);
212
213 int security_netlbl_sid_to_secattr(u32 sid,
214 struct netlbl_lsm_secattr *secattr);
215 #else
security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr * secattr,u32 * sid)216 static inline int security_netlbl_secattr_to_sid(
217 struct netlbl_lsm_secattr *secattr,
218 u32 *sid)
219 {
220 return -EIDRM;
221 }
222
security_netlbl_sid_to_secattr(u32 sid,struct netlbl_lsm_secattr * secattr)223 static inline int security_netlbl_sid_to_secattr(u32 sid,
224 struct netlbl_lsm_secattr *secattr)
225 {
226 return -ENOENT;
227 }
228 #endif /* CONFIG_NETLABEL */
229
230 const char *security_get_initial_sid_context(u32 sid);
231
232 /*
233 * status notifier using mmap interface
234 */
235 extern struct page *selinux_kernel_status_page(void);
236
237 #define SELINUX_KERNEL_STATUS_VERSION 1
238 struct selinux_kernel_status {
239 u32 version; /* version number of thie structure */
240 u32 sequence; /* sequence number of seqlock logic */
241 u32 enforcing; /* current setting of enforcing mode */
242 u32 policyload; /* times of policy reloaded */
243 u32 deny_unknown; /* current setting of deny_unknown */
244 /*
245 * The version > 0 supports above members.
246 */
247 } __attribute__((packed));
248
249 extern void selinux_status_update_setenforce(int enforcing);
250 extern void selinux_status_update_policyload(int seqno);
251 extern void selinux_complete_init(void);
252 extern int selinux_disable(void);
253 extern void exit_sel_fs(void);
254 extern struct path selinux_null;
255 extern struct vfsmount *selinuxfs_mount;
256 extern void selnl_notify_setenforce(int val);
257 extern void selnl_notify_policyload(u32 seqno);
258 extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
259
260 #endif /* _SELINUX_SECURITY_H_ */
261
262