security/selinux/include/security.h - kernel/bruno - Git at Google

 /*
  * 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_str_to_sid(const char *scontext, 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_ */
	/*
	* 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_str_to_sid(const char scontext, 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_ */