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freebsd-dev/contrib/openbsm/bsm/libbsm.h
Robert Watson ca0716f571 Initial vendor import of the TrustedBSD OpenBSM distribution, version 
1.0 alpha 1, an implementation of the documented Sun Basic Security
Module (BSM) Audit API and file format, as well as local extensions to
support the Mac OS X and FreeBSD operating systems.  Also included are
command line tools for audit trail reduction and conversion to text,
as well as documentation of the commands, file format, and APIs.  This
distribution is the foundation for the TrustedBSD Audit implementation,
and is a pre-release.

This is the first in a series of commits to introduce support for
Common Criteria CAPP security event audit support.

This software has been made possible through the generous
contributions of Apple Computer, Inc., SPARTA, Inc., as well as
members of the TrustedBSD Project, including Wayne Salamon <wsalamon>
and Tom Rhodes <trhodes>.  The original OpenBSM implementation was
created by McAfee Research under contract to Apple Computer, Inc., as
part of their CC CAPP security evaluation.

Many thanks to:	wsalamon, trhodes
Obtained from:	TrustedBSD Project
2006-01-31 19:40:12 +00:00

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/*
* Copyright (c) 2004 Apple Computer, Inc.
* All rights reserved.
*
* 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.
*
* $P4: //depot/projects/trustedbsd/openbsm/bsm/libbsm.h#14 $
*/
#ifndef _LIBBSM_H_
#define _LIBBSM_H_
/*
* NB: definitions, etc., marked with "OpenSSH compatibility" were introduced
* solely to allow OpenSSH to compile; Darwin/Apple code should not use them.
*/
#define MAX_ARGS 10
#define MAX_ENV 10
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/queue.h>
#include <bsm/audit.h>
#include <bsm/audit_record.h>
#include <stdio.h>
#include <stdint.h>
#ifdef __APPLE__
#include <mach/mach.h> /* audit_token_t */
#endif
#define AU_PRS_SUCCESS 1
#define AU_PRS_FAILURE 2
#define AU_PRS_BOTH (AU_PRS_SUCCESS|AU_PRS_FAILURE)
#define AU_PRS_USECACHE 0
#define AU_PRS_REREAD 1
#define AUDIT_EVENT_FILE "/etc/security/audit_event"
#define AUDIT_CLASS_FILE "/etc/security/audit_class"
#define AUDIT_CONTROL_FILE "/etc/security/audit_control"
#define AUDIT_USER_FILE "/etc/security/audit_user"
#define DIR_CONTROL_ENTRY "dir"
#define MINFREE_CONTROL_ENTRY "minfree"
#define FLAGS_CONTROL_ENTRY "flags"
#define NA_CONTROL_ENTRY "naflags"
#define AU_CLASS_NAME_MAX 8
#define AU_CLASS_DESC_MAX 72
#define AU_EVENT_NAME_MAX 30
#define AU_EVENT_DESC_MAX 50
#define AU_USER_NAME_MAX 50
#define AU_LINE_MAX 256
#define MAX_AUDITSTRING_LEN 256
#define BSM_TEXTBUFSZ MAX_AUDITSTRING_LEN /* OpenSSH compatibility */
/*
* These are referenced in Solaris 9 au_open(3BSM); values are guesses.
* Provided for OpenSSH compatibility.
*/
#define AU_TO_NO_WRITE 0
#define AU_TO_WRITE 1
__BEGIN_DECLS
struct au_event_ent {
au_event_t ae_number;
char *ae_name;
char *ae_desc;
au_class_t ae_class;
};
typedef struct au_event_ent au_event_ent_t;
struct au_class_ent {
char *ac_name;
au_class_t ac_class;
char *ac_desc;
};
typedef struct au_class_ent au_class_ent_t;
struct au_user_ent {
char *au_name;
au_mask_t au_always;
au_mask_t au_never;
};
typedef struct au_user_ent au_user_ent_t;
__END_DECLS
#define ADD_TO_MASK(m, c, sel) do { \
if (sel & AU_PRS_SUCCESS) \
(m)->am_success |= c; \
if (sel & AU_PRS_FAILURE) \
(m)->am_failure |= c; \
} while (0)
#define SUB_FROM_MASK(m, c, sel) do { \
if (sel & AU_PRS_SUCCESS) \
(m)->am_success &= ((m)->am_success ^ c); \
if (sel & AU_PRS_FAILURE) \
(m)->am_failure &= ((m)->am_failure ^ c); \
} while (0)
#define ADDMASK(m, v) do { \
(m)->am_success |= (v)->am_success; \
(m)->am_failure |= (v)->am_failure; \
} while(0)
#define SUBMASK(m, v) do { \
(m)->am_success &= ((m)->am_success ^ (v)->am_success); \
(m)->am_failure &= ((m)->am_failure ^ (v)->am_failure); \
} while(0)
__BEGIN_DECLS
/*
* Internal representation of audit user in libnsl.
*/
typedef struct au_user_str_s {
char *au_name;
char *au_always;
char *au_never;
} au_user_str_t;
typedef struct au_tid32 {
u_int32_t port;
u_int32_t addr;
} au_tid32_t;
typedef struct au_tid64 {
u_int64_t port;
u_int32_t addr;
} au_tid64_t;
typedef struct au_tidaddr32 {
u_int32_t port;
u_int32_t type;
u_int32_t addr[4];
} au_tidaddr32_t;
/*
* argument # 1 byte
* argument value 4 bytes/8 bytes (32-bit/64-bit value)
* text length 2 bytes
* text N bytes + 1 terminating NULL byte
*/
typedef struct {
u_char no;
u_int32_t val;
u_int16_t len;
char *text;
} au_arg32_t;
typedef struct {
u_char no;
u_int64_t val;
u_int16_t len;
char *text;
} au_arg64_t;
/*
* how to print 1 byte
* basic unit 1 byte
* unit count 1 byte
* data items (depends on basic unit)
*/
typedef struct {
u_char howtopr;
u_char bu;
u_char uc;
u_char *data;
} au_arb_t;
/*
* file access mode 4 bytes
* owner user ID 4 bytes
* owner group ID 4 bytes
* file system ID 4 bytes
* node ID 8 bytes
* device 4 bytes/8 bytes (32-bit/64-bit)
*/
typedef struct {
u_int32_t mode;
u_int32_t uid;
u_int32_t gid;
u_int32_t fsid;
u_int64_t nid;
u_int32_t dev;
} au_attr32_t;
typedef struct {
u_int32_t mode;
u_int32_t uid;
u_int32_t gid;
u_int32_t fsid;
u_int64_t nid;
u_int64_t dev;
} au_attr64_t;
/*
* count 4 bytes
* text count null-terminated string(s)
*/
typedef struct {
u_int32_t count;
char *text[MAX_ARGS];
} au_execarg_t;
/*
* count 4 bytes
* text count null-terminated string(s)
*/
typedef struct {
u_int32_t count;
char *text[MAX_ENV];
} au_execenv_t;
/*
* status 4 bytes
* return value 4 bytes
*/
typedef struct {
u_int32_t status;
u_int32_t ret;
} au_exit_t;
/*
* seconds of time 4 bytes
* milliseconds of time 4 bytes
* file name length 2 bytes
* file pathname N bytes + 1 terminating NULL byte
*/
typedef struct {
u_int32_t s;
u_int32_t ms;
u_int16_t len;
char *name;
} au_file_t;
/*
* number groups 2 bytes
* group list N * 4 bytes
*/
typedef struct {
u_int16_t no;
u_int32_t list[BSM_MAX_GROUPS];
} au_groups_t;
/*
* record byte count 4 bytes
* version # 1 byte [2]
* event type 2 bytes
* event modifier 2 bytes
* seconds of time 4 bytes/8 bytes (32-bit/64-bit value)
* milliseconds of time 4 bytes/8 bytes (32-bit/64-bit value)
*/
typedef struct {
u_int32_t size;
u_char version;
u_int16_t e_type;
u_int16_t e_mod;
u_int32_t s;
u_int32_t ms;
} au_header32_t;
/*
* record byte count 4 bytes
* version # 1 byte [2]
* event type 2 bytes
* event modifier 2 bytes
* address type/length 1 byte (XXX: actually, 4 bytes)
* machine address 4 bytes/16 bytes (IPv4/IPv6 address)
* seconds of time 4 bytes/8 bytes (32/64-bits)
* nanoseconds of time 4 bytes/8 bytes (32/64-bits)
*/
typedef struct {
u_int32_t size;
u_char version;
u_int16_t e_type;
u_int16_t e_mod;
u_int32_t ad_type;
u_int32_t addr[4];
u_int32_t s;
u_int32_t ms;
} au_header32_ex_t;
typedef struct {
u_int32_t size;
u_char version;
u_int16_t e_type;
u_int16_t e_mod;
u_int64_t s;
u_int64_t ms;
} au_header64_t;
typedef struct {
u_int32_t size;
u_char version;
u_int16_t e_type;
u_int16_t e_mod;
u_int32_t ad_type;
u_int32_t addr[4];
u_int64_t s;
u_int64_t ms;
} au_header64_ex_t;
/*
* internet address 4 bytes
*/
typedef struct {
u_int32_t addr;
} au_inaddr_t;
/*
* type 4 bytes
* internet address 16 bytes
*/
typedef struct {
u_int32_t type;
u_int32_t addr[4];
} au_inaddr_ex_t;
/*
* version and ihl 1 byte
* type of service 1 byte
* length 2 bytes
* id 2 bytes
* offset 2 bytes
* ttl 1 byte
* protocol 1 byte
* checksum 2 bytes
* source address 4 bytes
* destination address 4 bytes
*/
typedef struct {
u_char version;
u_char tos;
u_int16_t len;
u_int16_t id;
u_int16_t offset;
u_char ttl;
u_char prot;
u_int16_t chksm;
u_int32_t src;
u_int32_t dest;
} au_ip_t;
/*
* object ID type 1 byte
* object ID 4 bytes
*/
typedef struct {
u_char type;
u_int32_t id;
} au_ipc_t;
/*
* owner user ID 4 bytes
* owner group ID 4 bytes
* creator user ID 4 bytes
* creator group ID 4 bytes
* access mode 4 bytes
* slot sequence # 4 bytes
* key 4 bytes
*/
typedef struct {
u_int32_t uid;
u_int32_t gid;
u_int32_t puid;
u_int32_t pgid;
u_int32_t mode;
u_int32_t seq;
u_int32_t key;
} au_ipcperm_t;
/*
* port IP address 2 bytes
*/
typedef struct {
u_int16_t port;
} au_iport_t;
/*
* length 2 bytes
* data length bytes
*/
typedef struct {
u_int16_t size;
char *data;
} au_opaque_t;
/*
* path length 2 bytes
* path N bytes + 1 terminating NULL byte
*/
typedef struct {
u_int16_t len;
char *path;
} au_path_t;
/*
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* machine address 4 bytes
*/
typedef struct {
u_int32_t auid;
u_int32_t euid;
u_int32_t egid;
u_int32_t ruid;
u_int32_t rgid;
u_int32_t pid;
u_int32_t sid;
au_tid32_t tid;
} au_proc32_t;
typedef struct {
u_int32_t auid;
u_int32_t euid;
u_int32_t egid;
u_int32_t ruid;
u_int32_t rgid;
u_int32_t pid;
u_int32_t sid;
au_tid64_t tid;
} au_proc64_t;
/*
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* type 4 bytes
* machine address 16 bytes
*/
typedef struct {
u_int32_t auid;
u_int32_t euid;
u_int32_t egid;
u_int32_t ruid;
u_int32_t rgid;
u_int32_t pid;
u_int32_t sid;
au_tidaddr32_t tid;
} au_proc32ex_t;
/*
* error status 1 byte
* return value 4 bytes/8 bytes (32-bit/64-bit value)
*/
typedef struct {
u_char status;
u_int32_t ret;
} au_ret32_t;
typedef struct {
u_char err;
u_int64_t val;
} au_ret64_t;
/*
* sequence number 4 bytes
*/
typedef struct {
u_int32_t seqno;
} au_seq_t;
/*
* socket type 2 bytes
* local port 2 bytes
* local Internet address 4 bytes
* remote port 2 bytes
* remote Internet address 4 bytes
*/
typedef struct {
u_int16_t type;
u_int16_t l_port;
u_int32_t l_addr;
u_int16_t r_port;
u_int32_t r_addr;
} au_socket_t;
/*
* socket type 2 bytes
* local port 2 bytes
* address type/length 4 bytes
* local Internet address 4 bytes/16 bytes (IPv4/IPv6 address)
* remote port 4 bytes
* address type/length 4 bytes
* remote Internet address 4 bytes/16 bytes (IPv4/IPv6 address)
*/
typedef struct {
u_int16_t type;
u_int16_t l_port;
u_int32_t l_ad_type;
u_int32_t l_addr;
u_int32_t r_port;
u_int32_t r_ad_type;
u_int32_t r_addr;
} au_socket_ex32_t;
/*
* socket family 2 bytes
* local port 2 bytes
* socket address 4 bytes/16 bytes (IPv4/IPv6 address)
*/
typedef struct {
u_int16_t family;
u_int16_t port;
u_int32_t addr;
} au_socketinet32_t;
/*
* socket family 2 bytes
* path 104 bytes
*/
typedef struct {
u_int16_t family;
char path[104];
} au_socketunix_t;
/*
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* machine address 4 bytes
*/
typedef struct {
u_int32_t auid;
u_int32_t euid;
u_int32_t egid;
u_int32_t ruid;
u_int32_t rgid;
u_int32_t pid;
u_int32_t sid;
au_tid32_t tid;
} au_subject32_t;
typedef struct {
u_int32_t auid;
u_int32_t euid;
u_int32_t egid;
u_int32_t ruid;
u_int32_t rgid;
u_int32_t pid;
u_int32_t sid;
au_tid64_t tid;
} au_subject64_t;
/*
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* type 4 bytes
* machine address 16 bytes
*/
typedef struct {
u_int32_t auid;
u_int32_t euid;
u_int32_t egid;
u_int32_t ruid;
u_int32_t rgid;
u_int32_t pid;
u_int32_t sid;
au_tidaddr32_t tid;
} au_subject32ex_t;
/*
* text length 2 bytes
* text N bytes + 1 terminating NULL byte
*/
typedef struct {
u_int16_t len;
char *text;
} au_text_t;
typedef struct {
u_int32_t ident;
u_int16_t filter;
u_int16_t flags;
u_int32_t fflags;
u_int32_t data;
} au_kevent_t;
typedef struct {
u_int16_t length;
char *data;
} au_invalid_t;
/*
* trailer magic number 2 bytes
* record byte count 4 bytes
*/
typedef struct {
u_int16_t magic;
u_int32_t count;
} au_trailer_t;
struct tokenstr {
u_char id;
u_char *data;
size_t len;
union {
au_arg32_t arg32;
au_arg64_t arg64;
au_arb_t arb;
au_attr32_t attr32;
au_attr64_t attr64;
au_execarg_t execarg;
au_execenv_t execenv;
au_exit_t exit;
au_file_t file;
au_groups_t grps;
au_header32_t hdr32;
au_header32_ex_t hdr32_ex;
au_header64_t hdr64;
au_header64_ex_t hdr64_ex;
au_inaddr_t inaddr;
au_inaddr_ex_t inaddr_ex;
au_ip_t ip;
au_ipc_t ipc;
au_ipcperm_t ipcperm;
au_iport_t iport;
au_opaque_t opaque;
au_path_t path;
au_proc32_t proc32;
au_proc64_t proc64;
au_proc32ex_t proc32_ex;
au_ret32_t ret32;
au_ret64_t ret64;
au_seq_t seq;
au_socket_t socket;
au_socket_ex32_t socket_ex32;
au_socketinet32_t sockinet32;
au_socketunix_t sockunix;
au_subject32_t subj32;
au_subject64_t subj64;
au_subject32ex_t subj32_ex;
au_text_t text;
au_kevent_t kevent;
au_invalid_t invalid;
au_trailer_t trail;
} tt; /* The token is one of the above types */
};
typedef struct tokenstr tokenstr_t;
/*
* Functions relating to querying audit class information.
*/
void setauclass(void);
void endauclass(void);
struct au_class_ent *getauclassent(void);
struct au_class_ent *getauclassent_r(au_class_ent_t *class_int);
struct au_class_ent *getauclassnam(const char *name);
struct au_class_ent *getauclassnam_r(au_class_ent_t *class_int,
const char *name);
struct au_class_ent *getauclassnum(au_class_t class_number);
struct au_class_ent *getauclassnum_r(au_class_ent_t *class_int,
au_class_t class_number);
/*
* Functions relating to querying audit control information.
*/
void setac(void);
void endac(void);
int getacdir(char *name, int len);
int getacmin(int *min_val);
int getacflg(char *auditstr, int len);
int getacna(char *auditstr, int len);
int getauditflagsbin(char *auditstr, au_mask_t *masks);
int getauditflagschar(char *auditstr, au_mask_t *masks,
int verbose);
int au_preselect(au_event_t event, au_mask_t *mask_p,
int sorf, int flag);
/*
* Functions relating to querying audit event information.
*
* XXXRW: getauevnonam() has no _r version?
*/
void setauevent(void);
void endauevent(void);
struct au_event_ent *getauevent(void);
struct au_event_ent *getauevent_r(struct au_event_ent *e);
struct au_event_ent *getauevnam(const char *name);
struct au_event_ent *getauevnam_r(struct au_event_ent *e,
const char *name);
struct au_event_ent *getauevnum(au_event_t event_number);
struct au_event_ent *getauevnum_r(struct au_event_ent *e,
au_event_t event_number);
au_event_t *getauevnonam(const char *event_name);
au_event_t *getauevnonam_r(au_event_t *ev,
const char *event_name);
/*
* Functions relating to querying audit user information.
*/
void setauuser(void);
void endauuser(void);
struct au_user_ent *getauuserent(void);
struct au_user_ent *getauuserent_r(struct au_user_ent *u);
struct au_user_ent *getauusernam(const char *name);
struct au_user_ent *getauusernam_r(struct au_user_ent *u,
const char *name);
int au_user_mask(char *username, au_mask_t *mask_p);
int getfauditflags(au_mask_t *usremask,
au_mask_t *usrdmask, au_mask_t *lastmask);
/*
* Functions for reading and printing records and tokens from audit trails.
*/
int au_read_rec(FILE *fp, u_char **buf);
int au_fetch_tok(tokenstr_t *tok, u_char *buf, int len);
//XXX The following interface has different prototype from BSM
void au_print_tok(FILE *outfp, tokenstr_t *tok,
char *del, char raw, char sfrm);
__END_DECLS
#ifdef __APPLE__
#include <sys/appleapiopts.h>
/**************************************************************************
**************************************************************************
** The following definitions, functions, etc., are NOT officially
** supported: they may be changed or removed in the future. Do not use
** them unless you are prepared to cope with that eventuality.
**************************************************************************
**************************************************************************/
#ifdef __APPLE_API_PRIVATE
#define __BSM_INTERNAL_NOTIFY_KEY "com.apple.audit.change"
#endif /* __APPLE_API_PRIVATE */
/*
* au_get_state() return values
* XXX use AUC_* values directly instead (<bsm/audit.h>); AUDIT_OFF and
* AUDIT_ON are deprecated and WILL be removed.
*/
#ifdef __APPLE_API_PRIVATE
#define AUDIT_OFF AUC_NOAUDIT
#define AUDIT_ON AUC_AUDITING
#endif /* __APPLE_API_PRIVATE */
#endif /* !__APPLE__ */
/*
* Error return codes for audit_set_terminal_id(), audit_write() and its
* brethren. We have 255 (not including kAUNoErr) to play with.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
enum {
kAUNoErr = 0,
kAUBadParamErr = -66049,
kAUStatErr,
kAUSysctlErr,
kAUOpenErr,
kAUMakeSubjectTokErr,
kAUWriteSubjectTokErr,
kAUWriteCallerTokErr,
kAUMakeReturnTokErr,
kAUWriteReturnTokErr,
kAUCloseErr,
kAUMakeTextTokErr,
kAULastErr
};
#ifdef __APPLE__
/*
* Error return codes for au_get_state() and/or its private support
* functions. These codes are designed to be compatible with the
* NOTIFY_STATUS_* codes defined in <notify.h> but non-overlapping.
* Any changes to notify(3) may cause these values to change in future.
*
* AU_UNIMPL should never happen unless you've changed your system software
* without rebooting. Shame on you.
*/
#ifdef __APPLE_API_PRIVATE
#define AU_UNIMPL NOTIFY_STATUS_FAILED + 1 /* audit unimplemented */
#endif /* __APPLE_API_PRIVATE */
#endif /* !__APPLE__ */
__BEGIN_DECLS
/*
* XXX This prototype should be in audit_record.h
*
* au_free_token()
*
* @summary - au_free_token() deallocates a token_t created by any of
* the au_to_*() BSM API functions.
*
* The BSM API generally manages deallocation of token_t objects. However,
* if au_write() is passed a bad audit descriptor, the token_t * parameter
* will be left untouched. In that case, the caller can deallocate the
* token_t using au_free_token() if desired. This is, in fact, what
* audit_write() does, in keeping with the existing memory management model
* of the BSM API.
*
* @param tok - A token_t * generated by one of the au_to_*() BSM API
* calls. For convenience, tok may be NULL, in which case
* au_free_token() returns immediately.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
void au_free_token(token_t *tok);
/*
* Lightweight check to determine if auditing is enabled. If a client
* wants to use this to govern whether an entire series of audit calls
* should be made--as in the common case of a caller building a set of
* tokens, then writing them--it should cache the audit status in a local
* variable. This call always returns the current state of auditing.
*
* @return - AUC_AUDITING or AUC_NOAUDIT if no error occurred.
* Otherwise the function can return any of the errno values defined for
* setaudit(2), or AU_UNIMPL if audit does not appear to be supported by
* the system.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int au_get_state(void);
__END_DECLS
/* OpenSSH compatibility */
#define cannot_audit(x) (!(au_get_state() == AUC_AUDITING))
__BEGIN_DECLS
/*
* audit_set_terminal_id()
*
* @summary - audit_set_terminal_id() fills in an au_tid_t struct, which is
* used in audit session initialization by processes like /usr/bin/login.
*
* @param tid - A pointer to an au_tid_t struct.
*
* @return - kAUNoErr on success; kAUBadParamErr if tid is NULL, kAUStatErr
* or kAUSysctlErr if one of the underlying system calls fails (a message
* is sent to the system log in those cases).
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_set_terminal_id(au_tid_t *tid);
/*
* BEGIN au_write() WRAPPERS
*
* The following calls all wrap the existing BSM API. They use the
* provided subject information, if any, to construct the subject token
* required for every log message. They use the provided return/error
* value(s), if any, to construct the success/failure indication required
* for every log message. They only permit one "miscellaneous" token,
* which should contain the event-specific logging information mandated by
* CAPP.
*
* All these calls assume the caller has previously determined that
* auditing is enabled by calling au_get_state().
*/
/*
* audit_write()
*
* @summary - audit_write() is the basis for the other audit_write_*()
* calls. Performs a basic write of an audit record (subject, additional
* info, success/failure). Note that this call only permits logging one
* caller-specified token; clients needing to log more flexibly must use
* the existing BSM API (au_open(), et al.) directly.
*
* Note on memory management: audit_write() guarantees that the token_t *s
* passed to it will be deallocated whether or not the underlying write to
* the audit log succeeded. This addresses an inconsistency in the
* underlying BSM API in which token_t *s are usually but not always
* deallocated.
*
* @param event_code - The code for the event being logged. This should
* be one of the AUE_ values in /usr/include/bsm/audit_uevents.h.
*
* @param subject - A token_t * generated by au_to_subject(),
* au_to_subject32(), au_to_subject64(), or au_to_me(). If no subject is
* required, subject should be NULL.
*
* @param misctok - A token_t * generated by one of the au_to_*() BSM API
* calls. This should correspond to the additional information required by
* CAPP for the event being audited. If no additional information is
* required, misctok should be NULL.
*
* @param retval - The return value to be logged for this event. This
* should be 0 (zero) for success, otherwise the value is event-specific.
*
* @param errcode - Any error code associated with the return value (e.g.,
* errno or h_errno). If there was no error, errcode should be 0 (zero).
*
* @return - The status of the call: 0 (zero) on success, else one of the
* kAU*Err values defined above.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_write(short event_code, token_t *subject, token_t *misctok,
char retval, int errcode);
/*
* audit_write_success()
*
* @summary - audit_write_success() records an auditable event that did not
* encounter an error. The interface is designed to require as little
* direct use of the au_to_*() API as possible. It builds a subject token
* from the information passed in and uses that to invoke audit_write().
* A subject, as defined by CAPP, is a process acting on the user's behalf.
*
* If the subject information is the same as the current process, use
* au_write_success_self().
*
* @param event_code - The code for the event being logged. This should
* be one of the AUE_ values in /usr/include/bsm/audit_uevents.h.
*
* @param misctok - A token_t * generated by one of the au_to_*() BSM API
* calls. This should correspond to the additional information required by
* CAPP for the event being audited. If no additional information is
* required, misctok should be NULL.
*
* @param auid - The subject's audit ID.
*
* @param euid - The subject's effective user ID.
*
* @param egid - The subject's effective group ID.
*
* @param ruid - The subject's real user ID.
*
* @param rgid - The subject's real group ID.
*
* @param pid - The subject's process ID.
*
* @param sid - The subject's session ID.
*
* @param tid - The subject's terminal ID.
*
* @return - The status of the call: 0 (zero) on success, else one of the
* kAU*Err values defined above.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_write_success(short event_code, token_t *misctok, au_id_t auid,
uid_t euid, gid_t egid, uid_t ruid, gid_t rgid, pid_t pid,
au_asid_t sid, au_tid_t *tid);
/*
* audit_write_success_self()
*
* @summary - Similar to audit_write_success(), but used when the subject
* (process) is owned and operated by the auditable user him/herself.
*
* @param event_code - The code for the event being logged. This should
* be one of the AUE_ values in /usr/include/bsm/audit_uevents.h.
*
* @param misctok - A token_t * generated by one of the au_to_*() BSM API
* calls. This should correspond to the additional information required by
* CAPP for the event being audited. If no additional information is
* required, misctok should be NULL.
*
* @return - The status of the call: 0 (zero) on success, else one of the
* kAU*Err values defined above.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_write_success_self(short event_code, token_t *misctok);
/*
* audit_write_failure()
*
* @summary - audit_write_failure() records an auditable event that
* encountered an error. The interface is designed to require as little
* direct use of the au_to_*() API as possible. It builds a subject token
* from the information passed in and uses that to invoke audit_write().
* A subject, as defined by CAPP, is a process acting on the user's behalf.
*
* If the subject information is the same as the current process, use
* au_write_failure_self().
*
* @param event_code - The code for the event being logged. This should
* be one of the AUE_ values in /usr/include/bsm/audit_uevents.h.
*
* @param errmsg - A text message providing additional information about
* the event being audited.
*
* @param errret - A numerical value providing additional information about
* the error. This is intended to store the value of errno or h_errno if
* it's relevant. This can be 0 (zero) if no additional information is
* available.
*
* @param auid - The subject's audit ID.
*
* @param euid - The subject's effective user ID.
*
* @param egid - The subject's effective group ID.
*
* @param ruid - The subject's real user ID.
*
* @param rgid - The subject's real group ID.
*
* @param pid - The subject's process ID.
*
* @param sid - The subject's session ID.
*
* @param tid - The subject's terminal ID.
*
* @return - The status of the call: 0 (zero) on success, else one of the
* kAU*Err values defined above.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_write_failure(short event_code, char *errmsg, int errret,
au_id_t auid, uid_t euid, gid_t egid, uid_t ruid, gid_t rgid,
pid_t pid, au_asid_t sid, au_tid_t *tid);
/*
* audit_write_failure_self()
*
* @summary - Similar to audit_write_failure(), but used when the subject
* (process) is owned and operated by the auditable user him/herself.
*
* @param event_code - The code for the event being logged. This should
* be one of the AUE_ values in /usr/include/bsm/audit_uevents.h.
*
* @param errmsg - A text message providing additional information about
* the event being audited.
*
* @param errret - A numerical value providing additional information about
* the error. This is intended to store the value of errno or h_errno if
* it's relevant. This can be 0 (zero) if no additional information is
* available.
*
* @return - The status of the call: 0 (zero) on success, else one of the
* kAU*Err values defined above.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_write_failure_self(short event_code, char *errmsg, int errret);
/*
* audit_write_failure_na()
*
* @summary - audit_write_failure_na() records errors during login. Such
* errors are implicitly non-attributable (i.e., not ascribable to any user).
*
* @param event_code - The code for the event being logged. This should
* be one of the AUE_ values in /usr/include/bsm/audit_uevents.h.
*
* @param errmsg - A text message providing additional information about
* the event being audited.
*
* @param errret - A numerical value providing additional information about
* the error. This is intended to store the value of errno or h_errno if
* it's relevant. This can be 0 (zero) if no additional information is
* available.
*
* @param euid - The subject's effective user ID.
*
* @param egid - The subject's effective group ID.
*
* @param pid - The subject's process ID.
*
* @param tid - The subject's terminal ID.
*
* @return - The status of the call: 0 (zero) on success, else one of the
* kAU*Err values defined above.
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
int audit_write_failure_na(short event_code, char *errmsg, int errret,
uid_t euid, gid_t egid, pid_t pid, au_tid_t *tid);
/* END au_write() WRAPPERS */
#ifdef __APPLE__
/*
* audit_token_to_au32()
*
* @summary - Extract information from an audit_token_t, used to identify
* Mach tasks and senders of Mach messages as subjects to the audit system.
* audit_tokent_to_au32() is the only method that should be used to parse
* an audit_token_t, since its internal representation may change over
* time. A pointer parameter may be NULL if that information is not
* needed.
*
* @param atoken - the audit token containing the desired information
*
* @param auidp - Pointer to a uid_t; on return will be set to the task or
* sender's audit user ID
*
* @param euidp - Pointer to a uid_t; on return will be set to the task or
* sender's effective user ID
*
* @param egidp - Pointer to a gid_t; on return will be set to the task or
* sender's effective group ID
*
* @param ruidp - Pointer to a uid_t; on return will be set to the task or
* sender's real user ID
*
* @param rgidp - Pointer to a gid_t; on return will be set to the task or
* sender's real group ID
*
* @param pidp - Pointer to a pid_t; on return will be set to the task or
* sender's process ID
*
* @param asidp - Pointer to an au_asid_t; on return will be set to the
* task or sender's audit session ID
*
* @param tidp - Pointer to an au_tid_t; on return will be set to the task
* or sender's terminal ID
*
* XXXRW: In Apple's bsm-8, these are marked __APPLE_API_PRIVATE.
*/
void audit_token_to_au32(
audit_token_t atoken,
uid_t *auidp,
uid_t *euidp,
gid_t *egidp,
uid_t *ruidp,
gid_t *rgidp,
pid_t *pidp,
au_asid_t *asidp,
au_tid_t *tidp);
#endif /* !__APPLE__ */
__END_DECLS
#endif /* !_LIBBSM_H_ */
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