[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/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

/* 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_FILENAME_TRANS
#endif

/* Mask for just the mount related flags */
#define SE_MNTMASK	0x0f
/* Super block security struct flags for mount options */
#define CONTEXT_MNT	0x01
#define FSCONTEXT_MNT	0x02
#define ROOTCONTEXT_MNT	0x04
#define DEFCONTEXT_MNT	0x08
/* Non-mount related flags */
#define SE_SBINITIALIZED	0x10
#define SE_SBPROC		0x20
#define SE_SBLABELSUPP	0x40

#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_MAX
};
#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)

extern int selinux_policycap_netpeer;
extern int selinux_policycap_openperm;

/*
 * 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, ssize_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;
};

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

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

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, 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);

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 */

int security_fs_use(const char *fstype, unsigned int *behavior,
	u32 *sid);

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.
	 */
} __attribute__((packed));

extern void selinux_status_update_setenforce(int enforcing);
extern void selinux_status_update_policyload(int seqno);

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