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freebsd-nq/sys/bsm/audit.h
Robert Watson 5e386598a6 Merge OpenBSM 1.2-alpha5 from vendor branch to FreeBSD -CURRENT: 
- Add a new "qsize" parameter in audit_control and the getacqsize(3) API to
  query it, allowing to set the kernel's maximum audit queue length.
- Add support to push a mapping between audit event names and event numbers
  into the kernel (where supported) using new A_GETEVENT and A_SETEVENT
  auditon(2) operations.
- Add audit event identifiers for a number of new (and not-so-new) FreeBSD
  system calls including those for asynchronous I/O, thread management, SCTP,
  jails, multi-FIB support, and misc. POSIX interfaces such as
  posix_fallocate(2) and posix_fadvise(2).
- On operating systems supporting Capsicum, auditreduce(1) and praudit(1) now
  run sandboxed.
- Empty "flags" and "naflags" fields are now permitted in audit_control(5).

Many thanks to Christian Brueffer for producing the OpenBSM release and
importing/tagging it in the vendor branch.  This release will allow improved
auditing of a range of new FreeBSD functionality, as well as non-traditional
events (e.g., fine-grained I/O auditing) not required by the Orange Book or
Common Criteria.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, AFRL
MFC after:	3 weeks
2017-03-26 21:14:49 +00:00

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/*-
* Copyright (c) 2005-2009 Apple Inc.
* Copyright (c) 2016 Robert N. M. Watson
* All rights reserved.
*
* Portions of this software were developed by BAE Systems, the University of
* Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL
* contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent
* Computing (TC) research program.
*
* 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 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.
*
* $FreeBSD$
*/
#ifndef _BSM_AUDIT_H
#define _BSM_AUDIT_H
#include <sys/param.h>
#include <sys/types.h>
#define AUDIT_RECORD_MAGIC 0x828a0f1b
#define MAX_AUDIT_RECORDS 20
#define MAXAUDITDATA (0x8000 - 1)
#define MAX_AUDIT_RECORD_SIZE MAXAUDITDATA
#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 /* Below low watermark. */
#define AUDIT_TRIGGER_ROTATE_KERNEL 2 /* Kernel requests rotate. */
#define AUDIT_TRIGGER_READ_FILE 3 /* Re-read config file. */
#define AUDIT_TRIGGER_CLOSE_AND_DIE 4 /* Terminate audit. */
#define AUDIT_TRIGGER_NO_SPACE 5 /* Below min free space. */
#define AUDIT_TRIGGER_ROTATE_USER 6 /* User requests rotate. */
#define AUDIT_TRIGGER_INITIALIZE 7 /* User initialize of auditd. */
#define AUDIT_TRIGGER_EXPIRE_TRAILS 8 /* User expiration of trails. */
#define AUDIT_TRIGGER_MAX 8
/*
* The special device filename (FreeBSD).
*/
#define AUDITDEV_FILENAME "audit"
#define AUDIT_TRIGGER_FILE ("/dev/" AUDITDEV_FILENAME)
/*
* Pre-defined audit IDs
*/
#define AU_DEFAUDITID (uid_t)(-1)
#define AU_DEFAUDITSID 0
#define AU_ASSIGN_ASID -1
/*
* 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_OLDGETPOLICY 2
#define A_OLDSETPOLICY 3
#define A_GETKMASK 4
#define A_SETKMASK 5
#define A_OLDGETQCTRL 6
#define A_OLDSETQCTRL 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_OLDGETCOND 20
#define A_OLDSETCOND 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
#define A_GETSINFO_ADDR 32
#define A_GETPOLICY 33
#define A_SETPOLICY 34
#define A_GETQCTRL 35
#define A_SETQCTRL 36
#define A_GETCOND 37
#define A_SETCOND 38
#define A_GETEVENT 39 /* Get audit event-to-name mapping. */
#define A_SETEVENT 40 /* Set audit event-to-name mapping. */
/*
* Audit policy controls.
*/
#define AUDIT_CNT 0x0001
#define AUDIT_AHLT 0x0002
#define AUDIT_ARGV 0x0004
#define AUDIT_ARGE 0x0008
#define AUDIT_SEQ 0x0010
#define AUDIT_WINDATA 0x0020
#define AUDIT_USER 0x0040
#define AUDIT_GROUP 0x0080
#define AUDIT_TRAIL 0x0100
#define AUDIT_PATH 0x0200
#define AUDIT_SCNT 0x0400
#define AUDIT_PUBLIC 0x0800
#define AUDIT_ZONENAME 0x1000
#define AUDIT_PERZONE 0x2000
/*
* Default audit queue control parameters.
*/
#define AQ_HIWATER 100
#define AQ_MAXHIGH 10000
#define AQ_LOWATER 10
#define AQ_BUFSZ MAXAUDITDATA
#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;
typedef u_int64_t au_asflgs_t __attribute__ ((aligned (8)));
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. */
au_asflgs_t ai_flags; /* Audit session flags. */
};
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. */
au_asflgs_t ap_flags; /* Audit session flags. */
};
typedef struct auditpinfo_addr auditpinfo_addr_t;
struct au_session {
auditinfo_addr_t *as_aia_p; /* Ptr to full audit info. */
au_mask_t as_mask; /* Process Audit Masks. */
};
typedef struct au_session au_session_t;
/*
* Contents of token_t are opaque outside of libbsm.
*/
typedef struct au_token token_t;
/*
* Kernel audit queue control parameters:
* Default: Maximum:
* aq_hiwater: AQ_HIWATER (100) AQ_MAXHIGH (10000)
* aq_lowater: AQ_LOWATER (10) <aq_hiwater
* aq_bufsz: AQ_BUFSZ (32767) AQ_MAXBUFSZ (1048576)
* aq_delay: 20 20000 (not used)
*/
struct au_qctrl {
int aq_hiwater; /* Max # of audit recs in queue when */
/* threads with new ARs get blocked. */
int aq_lowater; /* # of audit recs in queue when */
/* blocked threads get unblocked. */
int aq_bufsz; /* Max size of audit record for audit(2). */
int aq_delay; /* Queue delay (not used). */
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_nonattrib;
int as_kernel;
int as_audit;
int as_auditctl;
int as_enqueue;
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_int64_t af_filesz;
u_int64_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;
/*
* Event-to-name mapping.
*/
#define EVNAMEMAP_NAME_SIZE 64
struct au_evname_map {
au_event_t en_number;
char en_name[EVNAMEMAP_NAME_SIZE];
};
typedef struct au_evname_map au_evname_map_t;
/*
* Audit system calls.
*/
#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);
#ifdef __APPLE_API_PRIVATE
#include <mach/port.h>
mach_port_name_t audit_session_self(void);
au_asid_t audit_session_join(mach_port_name_t port);
#endif /* __APPLE_API_PRIVATE */
#endif /* defined(_KERNEL) || defined(KERNEL) */
__END_DECLS
#endif /* !_BSM_AUDIT_H */
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