xref: /freebsd-9.3-release/sys/bsm/audit.h

/*
 * Copyright (c) 2005 Apple Computer, Inc.
 * All rights reserved.
 *
 * @APPLE_BSD_LICENSE_HEADER_START@
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @APPLE_BSD_LICENSE_HEADER_END@
 *
 * $P4: //depot/projects/trustedbsd/audit3/sys/bsm/audit.h#22 $
 * $FreeBSD: head/sys/bsm/audit.h 155191 2006-02-01 19:54:22Z rwatson $
 */

#ifndef _BSM_AUDIT_H
#define	_BSM_AUDIT_H

#include <sys/param.h>
#include <sys/cdefs.h>
#include <sys/queue.h>

#define	AUDIT_RECORD_MAGIC	0x828a0f1b
#define	MAX_AUDIT_RECORDS	20
#define	MAX_AUDIT_RECORD_SIZE	4096
#define	MIN_AUDIT_FILE_SIZE	(512 * 1024)

/*
 * Minimum noumber of free blocks on the filesystem containing the audit
 * log necessary to avoid a hard log rotation. DO NOT SET THIS VALUE TO 0
 * as the kernel does an unsigned compare, plus we want to leave a few blocks
 * free so userspace can terminate the log, etc.
 */
#define	AUDIT_HARD_LIMIT_FREE_BLOCKS	4

/*
 * Triggers for the audit daemon
 */
#define	AUDIT_TRIGGER_MIN		1
#define	AUDIT_TRIGGER_LOW_SPACE		1
#define	AUDIT_TRIGGER_OPEN_NEW		2
#define	AUDIT_TRIGGER_READ_FILE		3
#define	AUDIT_TRIGGER_CLOSE_AND_DIE	4
#define	AUDIT_TRIGGER_NO_SPACE		5
#define	AUDIT_TRIGGER_MAX		5

/*
 * File that will be read for trigger events from the kernel.
 */
#define	AUDIT_TRIGGER_FILE	"/dev/audit"

/*
 * The special device filename.
 */
#define	AUDITDEV_FILENAME	"audit"

/*
 * Pre-defined audit IDs
 */
#define	AU_DEFAUDITID	-1

/*
 * Define the masks for the classes of audit events.
 */
#define	AU_NULL		0x00000000
#define	AU_FREAD	0x00000001
#define	AU_FWRITE	0x00000002
#define	AU_FACCESS	0x00000004
#define	AU_FMODIFY	0x00000008
#define	AU_FCREATE	0x00000010
#define	AU_FDELETE	0x00000020
#define	AU_CLOSE	0x00000040
#define	AU_PROCESS	0x00000080
#define	AU_NET		0x00000100
#define	AU_IPC		0x00000200
#define	AU_NONAT	0x00000400
#define	AU_ADMIN	0x00000800
#define	AU_LOGIN	0x00001000
#define	AU_TFM		0x00002000
#define	AU_APPL		0x00004000
#define	AU_SETL		0x00008000
#define	AU_IFLOAT	0x00010000
#define	AU_PRIV		0x00020000
#define	AU_MAC_RW	0x00040000
#define	AU_XCONN	0x00080000
#define	AU_XCREATE	0x00100000
#define	AU_XDELETE	0x00200000
#define	AU_XIFLOAT	0x00400000
#define	AU_XPRIVS	0x00800000
#define	AU_XPRIVF	0x01000000
#define	AU_XMOVE	0x02000000
#define	AU_XDACF	0x04000000
#define	AU_XMACF	0x08000000
#define	AU_XSECATTR	0x10000000
#define	AU_IOCTL	0x20000000
#define	AU_EXEC		0x40000000
#define	AU_OTHER	0x80000000
#define	AU_ALL		0xffffffff

/*
 * IPC types
 */
#define	AT_IPC_MSG	((u_char)1)	/* Message IPC id. */
#define	AT_IPC_SEM	((u_char)2)	/* Semaphore IPC id. */
#define	AT_IPC_SHM	((u_char)3)	/* Shared mem IPC id. */

/*
 * Audit conditions.
 */
#define	AUC_UNSET		0
#define	AUC_AUDITING		1
#define	AUC_NOAUDIT		2
#define	AUC_DISABLED		-1

/*
 * auditon(2) commands.
 */
#define	A_GETPOLICY	2
#define	A_SETPOLICY	3
#define	A_GETKMASK	4
#define	A_SETKMASK	5
#define	A_GETQCTRL	6
#define	A_SETQCTRL	7
#define	A_GETCWD	8
#define	A_GETCAR	9
#define	A_GETSTAT	12
#define	A_SETSTAT	13
#define	A_SETUMASK	14
#define	A_SETSMASK	15
#define	A_GETCOND	20
#define	A_SETCOND	21
#define	A_GETCLASS	22
#define	A_SETCLASS	23
#define	A_GETPINFO	24
#define	A_SETPMASK	25
#define	A_SETFSIZE	26
#define	A_GETFSIZE	27
#define	A_GETPINFO_ADDR	28
#define	A_GETKAUDIT	29
#define	A_SETKAUDIT	30
#define	A_SENDTRIGGER	31

/*
 * Audit policy controls.
 */
#define	AUDIT_CNT	0x0001
#define	AUDIT_AHLT	0x0002
#define	AUDIT_ARGV	0x0004
#define	AUDIT_ARGE	0x0008
#define	AUDIT_PASSWD	0x0010
#define	AUDIT_SEQ	0x0020
#define	AUDIT_WINDATA	0x0040
#define	AUDIT_USER	0x0080
#define	AUDIT_GROUP	0x0100
#define	AUDIT_TRAIL	0x0200
#define	AUDIT_PATH	0x0400

/*
 * Audit queue control parameters
 */
#define	AQ_HIWATER	100
#define	AQ_MAXHIGH	10000
#define	AQ_LOWATER	10
#define	AQ_BUFSZ	1024
#define	AQ_MAXBUFSZ	1048576

/*
 * Default minimum percentage free space on file system.
 */
#define	AU_FS_MINFREE	20

/*
 * Type definitions used indicating the length of variable length addresses
 * in tokens containing addresses, such as header fields.
 */
#define	AU_IPv4		4
#define	AU_IPv6		16

__BEGIN_DECLS

typedef	uid_t		au_id_t;
typedef	pid_t		au_asid_t;
typedef	u_int16_t	au_event_t;
typedef	u_int16_t	au_emod_t;
typedef	u_int32_t	au_class_t;

struct au_tid {
	dev_t		port;
	u_int32_t	machine;
};
typedef	struct au_tid	au_tid_t;

struct au_tid_addr {
	dev_t		at_port;
	u_int32_t	at_type;
	u_int32_t	at_addr[4];
};
typedef	struct au_tid_addr	au_tid_addr_t;

struct au_mask {
	unsigned int    am_success;     /* Success bits. */
	unsigned int    am_failure;     /* Failure bits. */
};
typedef	struct au_mask	au_mask_t;

struct auditinfo {
	au_id_t		ai_auid;	/* Audit user ID. */
	au_mask_t	ai_mask;	/* Audit masks. */
	au_tid_t	ai_termid;	/* Terminal ID. */
	au_asid_t	ai_asid;	/* Audit session ID. */
};
typedef	struct auditinfo	auditinfo_t;

struct auditinfo_addr {
	au_id_t		ai_auid;	/* Audit user ID. */
	au_mask_t	ai_mask;	/* Audit masks. */
	au_tid_addr_t	ai_termid;	/* Terminal ID. */
	au_asid_t	ai_asid;	/* Audit session ID. */
};
typedef	struct auditinfo_addr	auditinfo_addr_t;

struct auditpinfo {
	pid_t		ap_pid;		/* ID of target process. */
	au_id_t		ap_auid;	/* Audit user ID. */
	au_mask_t	ap_mask;	/* Audit masks. */
	au_tid_t	ap_termid;	/* Terminal ID. */
	au_asid_t	ap_asid;	/* Audit session ID. */
};
typedef	struct auditpinfo	auditpinfo_t;

struct auditpinfo_addr {
	pid_t		ap_pid;		/* ID of target process. */
	au_id_t		ap_auid;	/* Audit user ID. */
	au_mask_t	ap_mask;	/* Audit masks. */
	au_tid_addr_t	ap_termid;	/* Terminal ID. */
	au_asid_t	ap_asid;	/* Audit session ID. */
};
typedef	struct auditpinfo_addr	auditpinfo_addr_t;

/* Token and record structures. */

struct au_token {
	u_char			*t_data;
	size_t			 len;
	TAILQ_ENTRY(au_token)	 tokens;
};
typedef	struct au_token	token_t;

struct au_record {
	char			 used;		/* Record currently in use? */
	int			 desc;		/* Descriptor for record. */
	TAILQ_HEAD(, au_token)	 token_q;	/* Queue of BSM tokens. */
	u_char			*data;
	size_t			 len;
	LIST_ENTRY(au_record)	 au_rec_q;
};
typedef	struct au_record	au_record_t;

/*
 * Kernel audit queue control parameters.
 */
struct au_qctrl {
	size_t	aq_hiwater;
	size_t	aq_lowater;
	size_t	aq_bufsz;
	clock_t	aq_delay;
	int	aq_minfree;	/* Minimum filesystem percent free space. */
};
typedef	struct au_qctrl	au_qctrl_t;

/*
 * Structure for the audit statistics.
 */
struct audit_stat {
	unsigned int	as_version;
	unsigned int	as_numevent;
	int		as_generated;
	int		as_nonattring;
	int		as_kernel;
	int		as_audit;
	int		as_auditctl;
	int		as_enqueu;
	int		as_written;
	int		as_wblocked;
	int		as_rblocked;
	int		as_dropped;
	int		as_totalsize;
	unsigned int	as_memused;
};
typedef	struct audit_stat	au_stat_t;

/*
 * Structure for the audit file statistics.
 */
struct audit_fstat {
	u_quad_t	af_filesz;
	u_quad_t	af_currsz;
};
typedef	struct audit_fstat	au_fstat_t;

/*
 * Audit to event class mapping.
 */
struct au_evclass_map {
	au_event_t	ec_number;
	au_class_t	ec_class;
};
typedef	struct au_evclass_map	au_evclass_map_t;

#if !defined(_KERNEL) && !defined(KERNEL)
int	audit(const void *, int);
int	auditon(int, void *, int);
int	auditctl(const char *);
int	getauid(au_id_t *);
int	setauid(const au_id_t *);
int	getaudit(struct auditinfo *);
int	setaudit(const struct auditinfo *);
int	getaudit_addr(struct auditinfo_addr *, int);
int	setaudit_addr(const struct auditinfo_addr *, int);
#endif /* defined(_KERNEL) || defined(KERNEL) */

__END_DECLS

#endif /* !_BSM_AUDIT_H */