[deliverable/linux.git] / security / selinux / include / security.h

/*
 * Security server interface.
 *
 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
 *
 */

#ifndef _SELINUX_SECURITY_H_
#define _SELINUX_SECURITY_H_

#include <linux/compiler.h>
#include <linux/dcache.h>
#include <linux/magic.h>
#include <linux/types.h>
#include "flask.h"

#define SECSID_NULL			0x00000000 /* unspecified SID */
#define SECSID_WILD			0xffffffff /* wildcard SID */
#define SECCLASS_NULL			0x0000 /* no class */

/* Identify specific policy version changes */
#define POLICYDB_VERSION_BASE		15
#define POLICYDB_VERSION_BOOL		16
#define POLICYDB_VERSION_IPV6		17
#define POLICYDB_VERSION_NLCLASS	18
#define POLICYDB_VERSION_VALIDATETRANS	19
#define POLICYDB_VERSION_MLS		19
#define POLICYDB_VERSION_AVTAB		20
#define POLICYDB_VERSION_RANGETRANS	21
#define POLICYDB_VERSION_POLCAP		22
#define POLICYDB_VERSION_PERMISSIVE	23
#define POLICYDB_VERSION_BOUNDARY	24
#define POLICYDB_VERSION_FILENAME_TRANS	25
#define POLICYDB_VERSION_ROLETRANS	26
#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS	27
#define POLICYDB_VERSION_DEFAULT_TYPE	28
#define POLICYDB_VERSION_CONSTRAINT_NAMES	29
#define POLICYDB_VERSION_XPERMS_IOCTL	30

/* Range of policy versions we understand*/
#define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
#define POLICYDB_VERSION_MAX	CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
#else
#define POLICYDB_VERSION_MAX	POLICYDB_VERSION_XPERMS_IOCTL
#endif

/* Mask for just the mount related flags */
#define SE_MNTMASK	0x0f
/* Super block security struct flags for mount options */
/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
#define CONTEXT_MNT	0x01
#define FSCONTEXT_MNT	0x02
#define ROOTCONTEXT_MNT	0x04
#define DEFCONTEXT_MNT	0x08
#define SBLABEL_MNT	0x10
/* Non-mount related flags */
#define SE_SBINITIALIZED	0x0100
#define SE_SBPROC		0x0200
#define SE_SBGENFS		0x0400

#define CONTEXT_STR	"context="
#define FSCONTEXT_STR	"fscontext="
#define ROOTCONTEXT_STR	"rootcontext="
#define DEFCONTEXT_STR	"defcontext="
#define LABELSUPP_STR "seclabel"

struct netlbl_lsm_secattr;

extern int selinux_enabled;

/* Policy capabilities */
enum {
	POLICYDB_CAPABILITY_NETPEER,
	POLICYDB_CAPABILITY_OPENPERM,
	POLICYDB_CAPABILITY_REDHAT1,
	POLICYDB_CAPABILITY_ALWAYSNETWORK,
	__POLICYDB_CAPABILITY_MAX
};
#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)

extern int selinux_policycap_netpeer;
extern int selinux_policycap_openperm;
extern int selinux_policycap_alwaysnetwork;

/*
 * type_datum properties
 * available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
 */
#define TYPEDATUM_PROPERTY_PRIMARY	0x0001
#define TYPEDATUM_PROPERTY_ATTRIBUTE	0x0002

/* limitation of boundary depth  */
#define POLICYDB_BOUNDS_MAXDEPTH	4

int security_mls_enabled(void);

int security_load_policy(void *data, size_t len);
int security_read_policy(void **data, size_t *len);
size_t security_policydb_len(void);

int security_policycap_supported(unsigned int req_cap);

#define SEL_VEC_MAX 32
struct av_decision {
	u32 allowed;
	u32 auditallow;
	u32 auditdeny;
	u32 seqno;
	u32 flags;
};

#define XPERMS_ALLOWED 1
#define XPERMS_AUDITALLOW 2
#define XPERMS_DONTAUDIT 4

#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
struct extended_perms_data {
	u32 p[8];
};

struct extended_perms_decision {
	u8 used;
	u8 driver;
	struct extended_perms_data *allowed;
	struct extended_perms_data *auditallow;
	struct extended_perms_data *dontaudit;
};

struct extended_perms {
	u16 len;	/* length associated decision chain */
	struct extended_perms_data drivers; /* flag drivers that are used */
};

/* definitions of av_decision.flags */
#define AVD_FLAGS_PERMISSIVE	0x0001

void security_compute_av(u32 ssid, u32 tsid,
			 u16 tclass, struct av_decision *avd,
			 struct extended_perms *xperms);

void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
			 u8 driver, struct extended_perms_decision *xpermd);

void security_compute_av_user(u32 ssid, u32 tsid,
			     u16 tclass, struct av_decision *avd);

int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
			    const struct qstr *qstr, u32 *out_sid);

int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
				 const char *objname, u32 *out_sid);

int security_member_sid(u32 ssid, u32 tsid,
	u16 tclass, u32 *out_sid);

int security_change_sid(u32 ssid, u32 tsid,
	u16 tclass, u32 *out_sid);

int security_sid_to_context(u32 sid, char **scontext,
	u32 *scontext_len);

int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);

int security_context_to_sid(const char *scontext, u32 scontext_len,
			    u32 *out_sid, gfp_t gfp);

int security_context_to_sid_default(const char *scontext, u32 scontext_len,
				    u32 *out_sid, u32 def_sid, gfp_t gfp_flags);

int security_context_to_sid_force(const char *scontext, u32 scontext_len,
				  u32 *sid);

int security_get_user_sids(u32 callsid, char *username,
			   u32 **sids, u32 *nel);

int security_port_sid(u8 protocol, u16 port, u32 *out_sid);

int security_netif_sid(char *name, u32 *if_sid);

int security_node_sid(u16 domain, void *addr, u32 addrlen,
	u32 *out_sid);

int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
				 u16 tclass);

int security_bounded_transition(u32 oldsid, u32 newsid);

int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);

int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
				 u32 xfrm_sid,
				 u32 *peer_sid);

int security_get_classes(char ***classes, int *nclasses);
int security_get_permissions(char *class, char ***perms, int *nperms);
int security_get_reject_unknown(void);
int security_get_allow_unknown(void);

#define SECURITY_FS_USE_XATTR		1 /* use xattr */
#define SECURITY_FS_USE_TRANS		2 /* use transition SIDs, e.g. devpts/tmpfs */
#define SECURITY_FS_USE_TASK		3 /* use task SIDs, e.g. pipefs/sockfs */
#define SECURITY_FS_USE_GENFS		4 /* use the genfs support */
#define SECURITY_FS_USE_NONE		5 /* no labeling support */
#define SECURITY_FS_USE_MNTPOINT	6 /* use mountpoint labeling */
#define SECURITY_FS_USE_NATIVE		7 /* use native label support */
#define SECURITY_FS_USE_MAX		7 /* Highest SECURITY_FS_USE_XXX */

int security_fs_use(struct super_block *sb);

int security_genfs_sid(const char *fstype, char *name, u16 sclass,
	u32 *sid);

#ifdef CONFIG_NETLABEL
int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
				   u32 *sid);

int security_netlbl_sid_to_secattr(u32 sid,
				   struct netlbl_lsm_secattr *secattr);
#else
static inline int security_netlbl_secattr_to_sid(
					    struct netlbl_lsm_secattr *secattr,
					    u32 *sid)
{
	return -EIDRM;
}

static inline int security_netlbl_sid_to_secattr(u32 sid,
					   struct netlbl_lsm_secattr *secattr)
{
	return -ENOENT;
}
#endif /* CONFIG_NETLABEL */

const char *security_get_initial_sid_context(u32 sid);

/*
 * status notifier using mmap interface
 */
extern struct page *selinux_kernel_status_page(void);

#define SELINUX_KERNEL_STATUS_VERSION	1
struct selinux_kernel_status {
	u32	version;	/* version number of thie structure */
	u32	sequence;	/* sequence number of seqlock logic */
	u32	enforcing;	/* current setting of enforcing mode */
	u32	policyload;	/* times of policy reloaded */
	u32	deny_unknown;	/* current setting of deny_unknown */
	/*
	 * The version > 0 supports above members.
	 */
} __packed;

extern void selinux_status_update_setenforce(int enforcing);
extern void selinux_status_update_policyload(int seqno);
extern void selinux_complete_init(void);
extern int selinux_disable(void);
extern void exit_sel_fs(void);
extern struct path selinux_null;
extern struct vfsmount *selinuxfs_mount;
extern void selnl_notify_setenforce(int val);
extern void selnl_notify_policyload(u32 seqno);
extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);

#endif /* _SELINUX_SECURITY_H_ */
Commit	Line	Data
1da177e4 LT	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
4bb93983	11	#include <linux/compiler.h>
652bb9b0	12	#include <linux/dcache.h>
75834fc3	13	#include <linux/magic.h>
2606fd1f	14	#include <linux/types.h>
1da177e4 LT	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
1da177e4 LT	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
782ebb99	28	#define POLICYDB_VERSION_AVTAB 20
f3f87714	29	#define POLICYDB_VERSION_RANGETRANS 21
3bb56b25	30	#define POLICYDB_VERSION_POLCAP 22
64dbf074	31	#define POLICYDB_VERSION_PERMISSIVE 23
d9250dea	32	#define POLICYDB_VERSION_BOUNDARY 24
652bb9b0	33	#define POLICYDB_VERSION_FILENAME_TRANS 25
8023976c	34	#define POLICYDB_VERSION_ROLETRANS 26
aa893269	35	#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
eed7795d	36	#define POLICYDB_VERSION_DEFAULT_TYPE 28
a660bec1	37	#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
fa1aa143	38	#define POLICYDB_VERSION_XPERMS_IOCTL 30
1da177e4 LT	39
	40	/* Range of policy versions we understand*/
	41	#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
016b9bdb SS	42	#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
	43	#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
	44	#else
fa1aa143	45	#define POLICYDB_VERSION_MAX POLICYDB_VERSION_XPERMS_IOCTL
016b9bdb	46	#endif
1da177e4	47
0d90a7ec DQ	48	/* Mask for just the mount related flags */
	49	#define SE_MNTMASK 0x0f
	50	/* Super block security struct flags for mount options */
cfca0303	51	/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
e0007529 EP	52	#define CONTEXT_MNT 0x01
	53	#define FSCONTEXT_MNT 0x02
	54	#define ROOTCONTEXT_MNT 0x04
	55	#define DEFCONTEXT_MNT 0x08
cfca0303	56	#define SBLABEL_MNT 0x10
0d90a7ec	57	/* Non-mount related flags */
cfca0303 EP	58	#define SE_SBINITIALIZED 0x0100
cfca0303 EP	59	#define SE_SBPROC 0x0200
134509d5	60	#define SE_SBGENFS 0x0400
e0007529	61
832cbd9a EP	62	#define CONTEXT_STR "context="
	63	#define FSCONTEXT_STR "fscontext="
	64	#define ROOTCONTEXT_STR "rootcontext="
	65	#define DEFCONTEXT_STR "defcontext="
11689d47	66	#define LABELSUPP_STR "seclabel"
832cbd9a	67
5778eabd	68	struct netlbl_lsm_secattr;
bb22f580	69
1da177e4	70	extern int selinux_enabled;
1da177e4	71
3bb56b25 PM	72	/* Policy capabilities */
	73	enum {
	74	POLICYDB_CAPABILITY_NETPEER,
b0c636b9	75	POLICYDB_CAPABILITY_OPENPERM,
2be4d74f CP	76	POLICYDB_CAPABILITY_REDHAT1,
2be4d74f CP	77	POLICYDB_CAPABILITY_ALWAYSNETWORK,
3bb56b25 PM	78	__POLICYDB_CAPABILITY_MAX
	79	};
	80	#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
	81
	82	extern int selinux_policycap_netpeer;
b0c636b9	83	extern int selinux_policycap_openperm;
2be4d74f	84	extern int selinux_policycap_alwaysnetwork;
3bb56b25	85
d9250dea KK	86	/*
	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
0719aaf5 GT	96	int security_mls_enabled(void);
0719aaf5 GT	97
b19d8eae	98	int security_load_policy(void *data, size_t len);
6b697323	99	int security_read_policy(void *data, size_t len);
cee74f47	100	size_t security_policydb_len(void);
1da177e4	101
3bb56b25 PM	102	int security_policycap_supported(unsigned int req_cap);
3bb56b25 PM	103
e47c8fc5	104	#define SEL_VEC_MAX 32
1da177e4 LT	105	struct av_decision {
1da177e4 LT	106	u32 allowed;
1da177e4 LT	107	u32 auditallow;
	108	u32 auditdeny;
	109	u32 seqno;
8a6f83af	110	u32 flags;
1da177e4 LT	111	};
1da177e4 LT	112
fa1aa143 JVS	113	#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)))
	119	struct extended_perms_data {
	120	u32 p[8];
	121	};
	122
	123	struct 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
	131	struct extended_perms {
	132	u16 len; /* length associated decision chain */
	133	struct extended_perms_data drivers; /* flag drivers that are used */
	134	};
	135
8a6f83af KK	136	/* definitions of av_decision.flags */
8a6f83af KK	137	#define AVD_FLAGS_PERMISSIVE 0x0001
64dbf074	138
19439d05	139	void security_compute_av(u32 ssid, u32 tsid,
fa1aa143 JVS	140	u16 tclass, struct av_decision *avd,
	141	struct extended_perms *xperms);
	142
	143	void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
	144	u8 driver, struct extended_perms_decision *xpermd);
c6d3aaa4	145
19439d05 SS	146	void security_compute_av_user(u32 ssid, u32 tsid,
19439d05 SS	147	u16 tclass, struct av_decision *avd);
1da177e4	148
652bb9b0 EP	149	int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
652bb9b0 EP	150	const struct qstr qstr, u32 out_sid);
c6d3aaa4	151
f50a3ec9 KK	152	int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
f50a3ec9 KK	153	const char objname, u32 out_sid);
1da177e4 LT	154
	155	int security_member_sid(u32 ssid, u32 tsid,
	156	u16 tclass, u32 *out_sid);
	157
	158	int security_change_sid(u32 ssid, u32 tsid,
	159	u16 tclass, u32 *out_sid);
	160
	161	int security_sid_to_context(u32 sid, char **scontext,
	162	u32 *scontext_len);
	163
12b29f34 SS	164	int security_sid_to_context_force(u32 sid, char *scontext, u32 scontext_len);
12b29f34 SS	165
8f0cfa52	166	int security_context_to_sid(const char *scontext, u32 scontext_len,
52a4c640	167	u32 *out_sid, gfp_t gfp);
1da177e4	168
7bf570dc	169	int security_context_to_sid_default(const char *scontext, u32 scontext_len,
869ab514	170	u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
f5c1d5b2	171
12b29f34 SS	172	int security_context_to_sid_force(const char *scontext, u32 scontext_len,
	173	u32 *sid);
	174
1da177e4 LT	175	int security_get_user_sids(u32 callsid, char *username,
	176	u32 *sids, u32 nel);
	177
3e112172	178	int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
1da177e4	179
e8bfdb9d	180	int security_netif_sid(char name, u32 if_sid);
1da177e4 LT	181
	182	int security_node_sid(u16 domain, void *addr, u32 addrlen,
	183	u32 *out_sid);
	184
	185	int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
b19d8eae	186	u16 tclass);
1da177e4	187
d9250dea KK	188	int security_bounded_transition(u32 oldsid, u32 newsid);
d9250dea KK	189
08554d6b VY	190	int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
08554d6b VY	191
220deb96 PM	192	int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
	193	u32 xfrm_sid,
	194	u32 *peer_sid);
	195
55fcf09b CP	196	int security_get_classes(char **classes, int nclasses);
55fcf09b CP	197	int security_get_permissions(char class, char *perms, int nperms);
3f12070e EP	198	int security_get_reject_unknown(void);
3f12070e EP	199	int security_get_allow_unknown(void);
55fcf09b	200
1da177e4 LT	201	#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 */
eb9ae686 DQ	207	#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
eb9ae686 DQ	208	#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
1da177e4	209
a64c54cf	210	int security_fs_use(struct super_block *sb);
1da177e4 LT	211
	212	int security_genfs_sid(const char fstype, char name, u16 sclass,
	213	u32 *sid);
	214
5778eabd PM	215	#ifdef CONFIG_NETLABEL
5778eabd PM	216	int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
5778eabd PM	217	u32 *sid);
	218
	219	int security_netlbl_sid_to_secattr(u32 sid,
	220	struct netlbl_lsm_secattr *secattr);
	221	#else
	222	static inline int security_netlbl_secattr_to_sid(
	223	struct netlbl_lsm_secattr *secattr,
5778eabd PM	224	u32 *sid)
	225	{
	226	return -EIDRM;
	227	}
	228
	229	static 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
f0ee2e46 JC	236	const char *security_get_initial_sid_context(u32 sid);
f0ee2e46 JC	237
11904167 KK	238	/*
	239	* status notifier using mmap interface
	240	*/
	241	extern struct page *selinux_kernel_status_page(void);
	242
	243	#define SELINUX_KERNEL_STATUS_VERSION 1
36f7f284	244	struct selinux_kernel_status {
11904167 KK	245	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	*/
4bb93983	253	} __packed;
11904167 KK	254
	255	extern void selinux_status_update_setenforce(int enforcing);
	256	extern void selinux_status_update_policyload(int seqno);
cc59a582	257	extern void selinux_complete_init(void);
58982b74	258	extern int selinux_disable(void);
ad3fa08c	259	extern void exit_sel_fs(void);
765927b2	260	extern struct path selinux_null;
ad3fa08c	261	extern struct vfsmount *selinuxfs_mount;
6a3fbe81 JM	262	extern void selnl_notify_setenforce(int val);
	263	extern void selnl_notify_policyload(u32 seqno);
	264	extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
11904167	265
1da177e4 LT	266	#endif /* _SELINUX_SECURITY_H_ */
1da177e4 LT	267