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/magic.h>
12 #include "flask.h"
13
14 #define SECSID_NULL 0x00000000 /* unspecified SID */
15 #define SECSID_WILD 0xffffffff /* wildcard SID */
16 #define SECCLASS_NULL 0x0000 /* no class */
17
18 /* Identify specific policy version changes */
19 #define POLICYDB_VERSION_BASE 15
20 #define POLICYDB_VERSION_BOOL 16
21 #define POLICYDB_VERSION_IPV6 17
22 #define POLICYDB_VERSION_NLCLASS 18
23 #define POLICYDB_VERSION_VALIDATETRANS 19
24 #define POLICYDB_VERSION_MLS 19
25 #define POLICYDB_VERSION_AVTAB 20
26 #define POLICYDB_VERSION_RANGETRANS 21
27 #define POLICYDB_VERSION_POLCAP 22
28 #define POLICYDB_VERSION_PERMISSIVE 23
29 #define POLICYDB_VERSION_BOUNDARY 24
30
31 /* Range of policy versions we understand*/
32 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
33 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
34 #define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
35 #else
36 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_BOUNDARY
37 #endif
38
39 /* Mask for just the mount related flags */
40 #define SE_MNTMASK 0x0f
41 /* Super block security struct flags for mount options */
42 #define CONTEXT_MNT 0x01
43 #define FSCONTEXT_MNT 0x02
44 #define ROOTCONTEXT_MNT 0x04
45 #define DEFCONTEXT_MNT 0x08
46 /* Non-mount related flags */
47 #define SE_SBINITIALIZED 0x10
48 #define SE_SBPROC 0x20
49 #define SE_SBLABELSUPP 0x40
50
51 #define CONTEXT_STR "context="
52 #define FSCONTEXT_STR "fscontext="
53 #define ROOTCONTEXT_STR "rootcontext="
54 #define DEFCONTEXT_STR "defcontext="
55 #define LABELSUPP_STR "seclabel"
56
57 struct netlbl_lsm_secattr;
58
59 extern int selinux_enabled;
60 extern int selinux_mls_enabled;
61
62 /* Policy capabilities */
63 enum {
64 POLICYDB_CAPABILITY_NETPEER,
65 POLICYDB_CAPABILITY_OPENPERM,
66 __POLICYDB_CAPABILITY_MAX
67 };
68 #define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
69
70 extern int selinux_policycap_netpeer;
71 extern int selinux_policycap_openperm;
72
73 /*
74 * type_datum properties
75 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
76 */
77 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001
78 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
79
80 /* limitation of boundary depth */
81 #define POLICYDB_BOUNDS_MAXDEPTH 4
82
83 int security_load_policy(void *data, size_t len);
84
85 int security_policycap_supported(unsigned int req_cap);
86
87 #define SEL_VEC_MAX 32
88 struct av_decision {
89 u32 allowed;
90 u32 auditallow;
91 u32 auditdeny;
92 u32 seqno;
93 u32 flags;
94 };
95
96 /* definitions of av_decision.flags */
97 #define AVD_FLAGS_PERMISSIVE 0x0001
98
99 int security_compute_av(u32 ssid, u32 tsid,
100 u16 tclass, u32 requested,
101 struct av_decision *avd);
102
103 int security_transition_sid(u32 ssid, u32 tsid,
104 u16 tclass, u32 *out_sid);
105
106 int security_member_sid(u32 ssid, u32 tsid,
107 u16 tclass, u32 *out_sid);
108
109 int security_change_sid(u32 ssid, u32 tsid,
110 u16 tclass, u32 *out_sid);
111
112 int security_sid_to_context(u32 sid, char **scontext,
113 u32 *scontext_len);
114
115 int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
116
117 int security_context_to_sid(const char *scontext, u32 scontext_len,
118 u32 *out_sid);
119
120 int security_context_to_sid_default(const char *scontext, u32 scontext_len,
121 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
122
123 int security_context_to_sid_force(const char *scontext, u32 scontext_len,
124 u32 *sid);
125
126 int security_get_user_sids(u32 callsid, char *username,
127 u32 **sids, u32 *nel);
128
129 int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
130
131 int security_netif_sid(char *name, u32 *if_sid);
132
133 int security_node_sid(u16 domain, void *addr, u32 addrlen,
134 u32 *out_sid);
135
136 int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
137 u16 tclass);
138
139 int security_bounded_transition(u32 oldsid, u32 newsid);
140
141 int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
142
143 int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
144 u32 xfrm_sid,
145 u32 *peer_sid);
146
147 int security_get_classes(char ***classes, int *nclasses);
148 int security_get_permissions(char *class, char ***perms, int *nperms);
149 int security_get_reject_unknown(void);
150 int security_get_allow_unknown(void);
151
152 #define SECURITY_FS_USE_XATTR 1 /* use xattr */
153 #define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
154 #define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
155 #define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
156 #define SECURITY_FS_USE_NONE 5 /* no labeling support */
157 #define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
158
159 int security_fs_use(const char *fstype, unsigned int *behavior,
160 u32 *sid);
161
162 int security_genfs_sid(const char *fstype, char *name, u16 sclass,
163 u32 *sid);
164
165 #ifdef CONFIG_NETLABEL
166 int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
167 u32 *sid);
168
169 int security_netlbl_sid_to_secattr(u32 sid,
170 struct netlbl_lsm_secattr *secattr);
171 #else
172 static inline int security_netlbl_secattr_to_sid(
173 struct netlbl_lsm_secattr *secattr,
174 u32 *sid)
175 {
176 return -EIDRM;
177 }
178
179 static inline int security_netlbl_sid_to_secattr(u32 sid,
180 struct netlbl_lsm_secattr *secattr)
181 {
182 return -ENOENT;
183 }
184 #endif /* CONFIG_NETLABEL */
185
186 const char *security_get_initial_sid_context(u32 sid);
187
188 #endif /* _SELINUX_SECURITY_H_ */
189
190
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