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
 37/* Range of policy versions we understand*/
 38#define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
 39#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
 40#define POLICYDB_VERSION_MAX	CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
 41#else
 42#define POLICYDB_VERSION_MAX	POLICYDB_VERSION_DEFAULT_TYPE
 43#endif
 44
 45/* Mask for just the mount related flags */
 46#define SE_MNTMASK	0x0f
 47/* Super block security struct flags for mount options */
 48#define CONTEXT_MNT	0x01
 49#define FSCONTEXT_MNT	0x02
 50#define ROOTCONTEXT_MNT	0x04
 51#define DEFCONTEXT_MNT	0x08
 52/* Non-mount related flags */
 53#define SE_SBINITIALIZED	0x10
 54#define SE_SBPROC		0x20
 55#define SE_SBLABELSUPP	0x40
 56
 57#define CONTEXT_STR	"context="
 58#define FSCONTEXT_STR	"fscontext="
 59#define ROOTCONTEXT_STR	"rootcontext="
 60#define DEFCONTEXT_STR	"defcontext="
 61#define LABELSUPP_STR "seclabel"
 62
 63struct netlbl_lsm_secattr;
 64
 65extern int selinux_enabled;
 66
 67/* Policy capabilities */
 68enum {
 69	POLICYDB_CAPABILITY_NETPEER,
 70	POLICYDB_CAPABILITY_OPENPERM,
 71	__POLICYDB_CAPABILITY_MAX
 72};
 73#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
 74
 75extern int selinux_policycap_netpeer;
 76extern int selinux_policycap_openperm;
 77
 78/*
 79 * type_datum properties
 80 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
 81 */
 82#define TYPEDATUM_PROPERTY_PRIMARY	0x0001
 83#define TYPEDATUM_PROPERTY_ATTRIBUTE	0x0002
 84
 85/* limitation of boundary depth  */
 86#define POLICYDB_BOUNDS_MAXDEPTH	4
 87
 88int security_mls_enabled(void);
 89
 90int security_load_policy(void *data, size_t len);
 91int security_read_policy(void **data, size_t *len);
 92size_t security_policydb_len(void);
 93
 94int security_policycap_supported(unsigned int req_cap);
 95
 96#define SEL_VEC_MAX 32
 97struct av_decision {
 98	u32 allowed;
 99	u32 auditallow;
100	u32 auditdeny;
101	u32 seqno;
102	u32 flags;
103};
104
105/* definitions of av_decision.flags */
106#define AVD_FLAGS_PERMISSIVE	0x0001
107
108void security_compute_av(u32 ssid, u32 tsid,
109			 u16 tclass, struct av_decision *avd);
110
111void security_compute_av_user(u32 ssid, u32 tsid,
112			     u16 tclass, struct av_decision *avd);
113
114int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
115			    const struct qstr *qstr, u32 *out_sid);
116
117int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
118				 const char *objname, u32 *out_sid);
119
120int security_member_sid(u32 ssid, u32 tsid,
121	u16 tclass, u32 *out_sid);
122
123int security_change_sid(u32 ssid, u32 tsid,
124	u16 tclass, u32 *out_sid);
125
126int security_sid_to_context(u32 sid, char **scontext,
127	u32 *scontext_len);
128
129int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
130
131int security_context_to_sid(const char *scontext, u32 scontext_len,
132	u32 *out_sid);
133
134int security_context_to_sid_default(const char *scontext, u32 scontext_len,
135				    u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
136
137int security_context_to_sid_force(const char *scontext, u32 scontext_len,
138				  u32 *sid);
139
140int security_get_user_sids(u32 callsid, char *username,
141			   u32 **sids, u32 *nel);
142
143int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
144
145int security_netif_sid(char *name, u32 *if_sid);
146
147int security_node_sid(u16 domain, void *addr, u32 addrlen,
148	u32 *out_sid);
149
150int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
151				 u16 tclass);
152
153int security_bounded_transition(u32 oldsid, u32 newsid);
154
155int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
156
157int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
158				 u32 xfrm_sid,
159				 u32 *peer_sid);
160
161int security_get_classes(char ***classes, int *nclasses);
162int security_get_permissions(char *class, char ***perms, int *nperms);
163int security_get_reject_unknown(void);
164int security_get_allow_unknown(void);
165
166#define SECURITY_FS_USE_XATTR		1 /* use xattr */
167#define SECURITY_FS_USE_TRANS		2 /* use transition SIDs, e.g. devpts/tmpfs */
168#define SECURITY_FS_USE_TASK		3 /* use task SIDs, e.g. pipefs/sockfs */
169#define SECURITY_FS_USE_GENFS		4 /* use the genfs support */
170#define SECURITY_FS_USE_NONE		5 /* no labeling support */
171#define SECURITY_FS_USE_MNTPOINT	6 /* use mountpoint labeling */
172
173int security_fs_use(const char *fstype, unsigned int *behavior,
174	u32 *sid);
175
176int security_genfs_sid(const char *fstype, char *name, u16 sclass,
177	u32 *sid);
178
179#ifdef CONFIG_NETLABEL
180int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
181				   u32 *sid);
182
183int security_netlbl_sid_to_secattr(u32 sid,
184				   struct netlbl_lsm_secattr *secattr);
185#else
186static inline int security_netlbl_secattr_to_sid(
187					    struct netlbl_lsm_secattr *secattr,
188					    u32 *sid)
189{
190	return -EIDRM;
191}
192
193static inline int security_netlbl_sid_to_secattr(u32 sid,
194					   struct netlbl_lsm_secattr *secattr)
195{
196	return -ENOENT;
197}
198#endif /* CONFIG_NETLABEL */
199
200const char *security_get_initial_sid_context(u32 sid);
201
202/*
203 * status notifier using mmap interface
204 */
205extern struct page *selinux_kernel_status_page(void);
206
207#define SELINUX_KERNEL_STATUS_VERSION	1
208struct selinux_kernel_status {
209	u32	version;	/* version number of thie structure */
210	u32	sequence;	/* sequence number of seqlock logic */
211	u32	enforcing;	/* current setting of enforcing mode */
212	u32	policyload;	/* times of policy reloaded */
213	u32	deny_unknown;	/* current setting of deny_unknown */
214	/*
215	 * The version > 0 supports above members.
216	 */
217} __attribute__((packed));
218
219extern void selinux_status_update_setenforce(int enforcing);
220extern void selinux_status_update_policyload(int seqno);
221extern void selinux_complete_init(void);
222extern int selinux_disable(void);
223extern void exit_sel_fs(void);
224extern struct dentry *selinux_null;
225extern struct vfsmount *selinuxfs_mount;
226extern void selnl_notify_setenforce(int val);
227extern void selnl_notify_policyload(u32 seqno);
228extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
229
230#endif /* _SELINUX_SECURITY_H_ */
231