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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Gideon Israel Dsouza4bb93982014-06-11 21:25:30 +053011#include <linux/compiler.h>
Eric Paris652bb9b2011-02-01 11:05:40 -050012#include <linux/dcache.h>
Eric Paris75834fc2009-05-18 10:26:10 -040013#include <linux/magic.h>
Eric Paris2606fd12010-10-13 16:24:41 -040014#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070021/* 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
Stephen Smalley782ebb92005-09-03 15:55:16 -070028#define POLICYDB_VERSION_AVTAB 20
Darrel Goeddelf3f87712006-09-25 23:31:59 -070029#define POLICYDB_VERSION_RANGETRANS 21
Paul Moore3bb56b22008-01-29 08:38:19 -050030#define POLICYDB_VERSION_POLCAP 22
Eric Paris64dbf072008-03-31 12:17:33 +110031#define POLICYDB_VERSION_PERMISSIVE 23
KaiGai Koheid9250de2008-08-28 16:35:57 +090032#define POLICYDB_VERSION_BOUNDARY 24
Eric Paris652bb9b2011-02-01 11:05:40 -050033#define POLICYDB_VERSION_FILENAME_TRANS 25
Harry Ciao80239762011-03-25 13:51:56 +080034#define POLICYDB_VERSION_ROLETRANS 26
Eric Parisaa893262012-03-20 14:35:12 -040035#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
Eric Pariseed77952012-03-20 14:35:12 -040036#define POLICYDB_VERSION_DEFAULT_TYPE 28
Richard Hainesa660bec2013-11-19 17:34:23 -050037#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
Jeff Vander Stoepfa1aa142015-07-10 17:19:56 -040038#define POLICYDB_VERSION_XPERMS_IOCTL 30
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40/* Range of policy versions we understand*/
41#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
Stephen Smalley016b9bd2006-09-25 23:31:58 -070042#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
43#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
44#else
Jeff Vander Stoepfa1aa142015-07-10 17:19:56 -040045#define POLICYDB_VERSION_MAX POLICYDB_VERSION_XPERMS_IOCTL
Stephen Smalley016b9bd2006-09-25 23:31:58 -070046#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
David P. Quigley0d90a7e2009-01-16 09:22:02 -050048/* Mask for just the mount related flags */
49#define SE_MNTMASK 0x0f
50/* Super block security struct flags for mount options */
Eric Pariscfca0302012-10-09 16:20:08 -040051/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
Eric Parise0007522008-03-05 10:31:54 -050052#define CONTEXT_MNT 0x01
53#define FSCONTEXT_MNT 0x02
54#define ROOTCONTEXT_MNT 0x04
55#define DEFCONTEXT_MNT 0x08
Eric Pariscfca0302012-10-09 16:20:08 -040056#define SBLABEL_MNT 0x10
David P. Quigley0d90a7e2009-01-16 09:22:02 -050057/* Non-mount related flags */
Eric Pariscfca0302012-10-09 16:20:08 -040058#define SE_SBINITIALIZED 0x0100
59#define SE_SBPROC 0x0200
Stephen Smalley134509d2015-06-04 16:22:17 -040060#define SE_SBGENFS 0x0400
Eric Parise0007522008-03-05 10:31:54 -050061
Eric Paris832cbd92008-04-01 13:24:09 -040062#define CONTEXT_STR "context="
63#define FSCONTEXT_STR "fscontext="
64#define ROOTCONTEXT_STR "rootcontext="
65#define DEFCONTEXT_STR "defcontext="
David P. Quigley11689d42009-01-16 09:22:03 -050066#define LABELSUPP_STR "seclabel"
Eric Paris832cbd92008-04-01 13:24:09 -040067
Paul Moore5778eab2007-02-28 15:14:22 -050068struct netlbl_lsm_secattr;
James Morrisbb22f582006-11-17 23:01:03 -050069
Linus Torvalds1da177e2005-04-16 15:20:36 -070070extern int selinux_enabled;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Paul Moore3bb56b22008-01-29 08:38:19 -050072/* Policy capabilities */
73enum {
74 POLICYDB_CAPABILITY_NETPEER,
Eric Parisb0c636b2008-02-28 12:58:40 -050075 POLICYDB_CAPABILITY_OPENPERM,
Chris PeBenito2be4d742013-05-03 09:05:39 -040076 POLICYDB_CAPABILITY_REDHAT1,
77 POLICYDB_CAPABILITY_ALWAYSNETWORK,
Paul Moore3bb56b22008-01-29 08:38:19 -050078 __POLICYDB_CAPABILITY_MAX
79};
80#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
81
82extern int selinux_policycap_netpeer;
Eric Parisb0c636b2008-02-28 12:58:40 -050083extern int selinux_policycap_openperm;
Chris PeBenito2be4d742013-05-03 09:05:39 -040084extern int selinux_policycap_alwaysnetwork;
Paul Moore3bb56b22008-01-29 08:38:19 -050085
KaiGai Koheid9250de2008-08-28 16:35:57 +090086/*
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
Guido Trentalancia0719aaf2010-02-03 16:40:20 +010096int security_mls_enabled(void);
97
Eric Parisb19d8ea2008-04-22 17:46:11 -040098int security_load_policy(void *data, size_t len);
Eric Paris6b697322011-04-20 10:21:28 -040099int security_read_policy(void **data, size_t *len);
Eric Pariscee74f42010-10-13 17:50:25 -0400100size_t security_policydb_len(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Paul Moore3bb56b22008-01-29 08:38:19 -0500102int security_policycap_supported(unsigned int req_cap);
103
Christopher J. PeBenitoe47c8fc2007-05-23 09:12:09 -0400104#define SEL_VEC_MAX 32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105struct av_decision {
106 u32 allowed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 u32 auditallow;
108 u32 auditdeny;
109 u32 seqno;
KaiGai Kohei8a6f83a2009-04-01 10:07:57 +0900110 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111};
112
Jeff Vander Stoepfa1aa142015-07-10 17:19:56 -0400113#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
KaiGai Kohei8a6f83a2009-04-01 10:07:57 +0900136/* definitions of av_decision.flags */
137#define AVD_FLAGS_PERMISSIVE 0x0001
Eric Paris64dbf072008-03-31 12:17:33 +1100138
Stephen Smalley19439d02010-01-14 17:28:10 -0500139void security_compute_av(u32 ssid, u32 tsid,
Jeff Vander Stoepfa1aa142015-07-10 17:19:56 -0400140 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);
Stephen Smalleyc6d3aaa2009-09-30 13:37:50 -0400145
Stephen Smalley19439d02010-01-14 17:28:10 -0500146void security_compute_av_user(u32 ssid, u32 tsid,
147 u16 tclass, struct av_decision *avd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Eric Paris652bb9b2011-02-01 11:05:40 -0500149int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
150 const struct qstr *qstr, u32 *out_sid);
Stephen Smalleyc6d3aaa2009-09-30 13:37:50 -0400151
Kohei Kaigaif50a3ec2011-04-01 15:39:26 +0100152int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
153 const char *objname, u32 *out_sid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
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
Stephen Smalley12b29f32008-05-07 13:03:20 -0400164int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
165
David Howells8f0cfa52008-04-29 00:59:41 -0700166int security_context_to_sid(const char *scontext, u32 scontext_len,
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +0100167 u32 *out_sid, gfp_t gfp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
David Howells7bf570d2008-04-29 20:52:51 +0100169int security_context_to_sid_default(const char *scontext, u32 scontext_len,
Stephen Smalley869ab512008-04-04 08:46:05 -0400170 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
James Morrisf5c1d5b2005-07-28 01:07:37 -0700171
Stephen Smalley12b29f32008-05-07 13:03:20 -0400172int security_context_to_sid_force(const char *scontext, u32 scontext_len,
173 u32 *sid);
174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175int security_get_user_sids(u32 callsid, char *username,
176 u32 **sids, u32 *nel);
177
Paul Moore3e112172008-04-10 10:48:14 -0400178int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Paul Mooree8bfdb92008-01-29 08:38:08 -0500180int security_netif_sid(char *name, u32 *if_sid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182int security_node_sid(u16 domain, void *addr, u32 addrlen,
183 u32 *out_sid);
184
185int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
Eric Parisb19d8ea2008-04-22 17:46:11 -0400186 u16 tclass);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
KaiGai Koheid9250de2008-08-28 16:35:57 +0900188int security_bounded_transition(u32 oldsid, u32 newsid);
189
Venkat Yekkirala08554d62006-07-24 23:27:16 -0700190int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
191
Paul Moore220deb92008-01-29 08:38:23 -0500192int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
193 u32 xfrm_sid,
194 u32 *peer_sid);
195
Christopher J. PeBenito55fcf092007-05-23 09:12:06 -0400196int security_get_classes(char ***classes, int *nclasses);
197int security_get_permissions(char *class, char ***perms, int *nperms);
Eric Paris3f120702007-09-21 14:37:10 -0400198int security_get_reject_unknown(void);
199int security_get_allow_unknown(void);
Christopher J. PeBenito55fcf092007-05-23 09:12:06 -0400200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201#define SECURITY_FS_USE_XATTR 1 /* use xattr */
202#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
203#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
204#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
205#define SECURITY_FS_USE_NONE 5 /* no labeling support */
206#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
David Quigleyeb9ae682013-05-22 12:50:37 -0400207#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
208#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Eric Parisa64c54c2012-08-24 15:59:07 -0400210int security_fs_use(struct super_block *sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
212int security_genfs_sid(const char *fstype, char *name, u16 sclass,
213 u32 *sid);
214
Paul Moore5778eab2007-02-28 15:14:22 -0500215#ifdef CONFIG_NETLABEL
216int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
Paul Moore5778eab2007-02-28 15:14:22 -0500217 u32 *sid);
218
219int security_netlbl_sid_to_secattr(u32 sid,
220 struct netlbl_lsm_secattr *secattr);
221#else
222static inline int security_netlbl_secattr_to_sid(
223 struct netlbl_lsm_secattr *secattr,
Paul Moore5778eab2007-02-28 15:14:22 -0500224 u32 *sid)
225{
226 return -EIDRM;
227}
228
229static inline int security_netlbl_sid_to_secattr(u32 sid,
230 struct netlbl_lsm_secattr *secattr)
231{
232 return -ENOENT;
233}
234#endif /* CONFIG_NETLABEL */
235
James Carterf0ee2e42007-04-04 10:11:29 -0400236const char *security_get_initial_sid_context(u32 sid);
237
KaiGai Kohei11904162010-09-14 18:28:39 +0900238/*
239 * status notifier using mmap interface
240 */
241extern struct page *selinux_kernel_status_page(void);
242
243#define SELINUX_KERNEL_STATUS_VERSION 1
KaiGai Kohei36f7f282010-09-30 11:49:55 +0900244struct selinux_kernel_status {
KaiGai Kohei11904162010-09-14 18:28:39 +0900245 u32 version; /* version number of thie structure */
246 u32 sequence; /* sequence number of seqlock logic */
247 u32 enforcing; /* current setting of enforcing mode */
248 u32 policyload; /* times of policy reloaded */
249 u32 deny_unknown; /* current setting of deny_unknown */
250 /*
251 * The version > 0 supports above members.
252 */
Gideon Israel Dsouza4bb93982014-06-11 21:25:30 +0530253} __packed;
KaiGai Kohei11904162010-09-14 18:28:39 +0900254
255extern void selinux_status_update_setenforce(int enforcing);
256extern void selinux_status_update_policyload(int seqno);
James Morriscc59a582011-08-17 11:13:31 +1000257extern void selinux_complete_init(void);
James Morris58982b72011-08-17 11:17:14 +1000258extern int selinux_disable(void);
James Morrisad3fa082011-08-30 10:50:12 +1000259extern void exit_sel_fs(void);
Al Viro765927b2012-06-26 21:58:53 +0400260extern struct path selinux_null;
James Morrisad3fa082011-08-30 10:50:12 +1000261extern struct vfsmount *selinuxfs_mount;
James Morris6a3fbe82011-08-30 12:09:15 +1000262extern void selnl_notify_setenforce(int val);
263extern void selnl_notify_policyload(u32 seqno);
264extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
KaiGai Kohei11904162010-09-14 18:28:39 +0900265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266#endif /* _SELINUX_SECURITY_H_ */
267