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.\" $P4: //depot/projects/trustedbsd/openbsm/libbsm/libbsm.3#17 $
.\"
.Dd March 5, 2009
.Dt LIBBSM 3
.Os
.Sh NAME
.Nm libbsm
.Nd "Basic Security Module (BSM) Audit API"
.Sh LIBRARY
.Lb libbsm
.Sh SYNOPSIS
.In bsm/libbsm.h
.Sh DESCRIPTION
The
.Nm
library routines provide an interface to BSM audit record streams, allowing
both the parsing of existing audit streams, as well as the creation of new
audit records and streams.
.Sh INTERFACES
The
.Nm
library
provides a large number of Audit programming interfaces in several classes:
event stream interfaces, class interfaces, control interfaces, event
interfaces, I/O interfaces, mask interfaces, notification interfaces, token
interfaces, and user interfaces.
These are described respectively in the
.Xr au_class 3 ,
.Xr au_control 3 ,
.Xr au_event 3 ,
.Xr au_mask 3 ,
.Xr au_notify 3 ,
.Xr au_stream 3 ,
.Xr au_token 3 ,
and
.Xr au_user 3
manual pages.
.Ss Audit Event Stream Interfaces
Audit event stream interfaces support interaction with file-backed audit
event streams:
.Xr au_close 3 ,
.Xr au_close_buffer 3 ,
.Xr au_free_token 3 ,
.Xr au_open 3 ,
.Xr au_write 3 ,
.Xr audit_submit 3 .
.Ss Audit Class Interfaces
Audit class interfaces support the look up of information from the
.Xr audit_class 5
database:
.Xr endauclass 3 ,
.Xr getauclassent 3 ,
.Xr getauclassent_r 3 ,
.Xr getauclassnam 3 ,
.Xr getauclassnam_r 3 ,
.Xr setauclass 3 .
.Ss Audit Control Interfaces
Audit control interfaces support the look up of information from the
.Xr audit_control 5
database:
.Xr endac 3 ,
.Xr setac 3 ,
.Xr getacdir 3 ,
.Xr getacfilesz 3 ,
.Xr getacflg 3 ,
.Xr getacmin 3 ,
.Xr getacna 3 ,
.Xr getacpol 3 ,
.Xr au_poltostr 3 ,
.Xr au_strtopol 3 .
.Ss Audit Event Interfaces
Audit event interfaces support the look up of information from the
.Xr audit_event 5
database:
.Xr endauevent 3 ,
.Xr setauevent 3 ,
.Xr getauevent 3 ,
.Xr getauevent_r 3 ,
.Xr getauevnam 3 ,
.Xr getauevnam_r 3 ,
.Xr getauevnonam 3 ,
.Xr getauevnonam_r 3 ,
.Xr getauevnum 3 ,
.Xr getauevnum_r 3 .
.Ss Audit I/O Interfaces
Audit I/O interfaces support the processing and printing of tokens, as well
as the reading of audit records:
.Xr au_fetch_tok 3 ,
.Xr au_print_tok 3 ,
.Xr au_read_rec 3 .
.Ss Audit Mask Interfaces
Audit mask interfaces convert support the conversion between strings and
.Vt au_mask_t
values.
They may also be used to determine if a particular audit event is matched
by a mask:
.Xr au_preselect 3 ,
.Xr getauditflagsbin 3 ,
.Xr getauditflagschar 3 .
.Ss Audit Notification Interfaces
Audit notification routines track audit state in a form permitting efficient
update, avoiding frequent system calls to check the kernel audit state:
.Xr au_get_state 3 ,
.Xr au_notify_initialize 3 ,
.Xr au_notify_terminate 3 .
These interfaces are implemented only for Darwin/Mac OS X.
.Ss Audit Token Interface
Audit token interfaces permit the creation of tokens for use in creating
audit records for submission to event streams.
Each interface converts a C type to its
.Vt token_t
representation:
.Xr au_to_arg 3 ,
.Xr au_to_arg32 3 ,
.Xr au_to_arg64 3 ,
.Xr au_to_attr64 3 ,
.Xr au_to_data 3 ,
.Xr au_to_exec_args 3 ,
.Xr au_to_exec_env 3 ,
.Xr au_to_exit 3 ,
.Xr au_to_file 3 ,
.Xr au_to_groups 3 ,
.Xr au_to_header32 3 ,
.Xr au_to_header64 3 ,
.Xr au_to_in_addr 3 ,
.Xr au_to_in_addr_ex 3 ,
.Xr au_to_ip 3 ,
.Xr au_to_ipc 3 ,
.Xr au_to_ipc_perm 3 ,
.Xr au_to_iport 3 ,
.Xr au_to_me 3 ,
.Xr au_to_newgroups 3 ,
.Xr au_to_opaque 3 ,
.Xr au_to_path 3 ,
.Xr au_to_process 3 ,
.Xr au_to_process32 3 ,
.Xr au_to_process64 3 ,
.Xr au_to_process_ex 3 ,
.Xr au_to_process32_ex 3 ,
.Xr au_to_process64_ex 3 ,
.Xr au_to_return 3 ,
.Xr au_to_return32 3 ,
.Xr au_to_return64 3 ,
.Xr au_to_seq 3 ,
.Xr au_to_sock_inet 3 ,
.Xr au_to_sock_inet32 3 ,
.Xr au_to_sock_inet128 3 ,
.Xr au_to_socket_ex 3 ,
.Xr au_to_subject 3 ,
.Xr au_to_subject32 3 ,
.Xr au_to_subject64 3 ,
.Xr au_to_subject_ex 3 ,
.Xr au_to_subject32_ex 3 ,
.Xr au_to_subject64_ex 3 ,
.Xr au_to_text 3 ,
.Xr au_to_trailer 3 ,
.Xr au_to_zonename 3 .
.Ss Audit User Interfaces
Audit user interfaces support the look up of information from the
.Xr audit_user 5
database:
.Xr au_user_mask 3 ,
.Xr endauuser 3 ,
.Xr setauuser 3 ,
.Xr getauuserent 3 ,
.Xr getauuserent_r 3 ,
.Xr getauusernam 3 ,
.Xr getauusernam_r 3 ,
.Xr getfauditflags 3 .
.Ss Audit Constant Conversion Interfaces
These functions convert between BSM and local constants, including the
.Xr errno 2
number, socket type, and protocol famil spaces, and must be used to generate
and interpret BSM return and extended socket tokens:
.Xr au_bsm_to_domain 3 ,
.Xr au_bsm_to_errno 3 ,
.Xr au_bsm_to_fcntl_cmd 3 ,
.Xr au_bsm_to_socket_type 3 ,
.Xr au_domain_to_bsm 3 ,
.Xr au_errno_to_bsm 3 ,
.Xr au_fcntl_cmd_to_bsm 3 ,
.Xr au_socket_type_to_bsm 3 .
.Sh SEE ALSO
.Xr au_class 3 ,
.Xr au_domain 3 ,
.Xr au_errno 3 ,
.Xr au_mask 3 ,
.Xr au_notify 3 ,
.Xr au_socket_type 3 ,
.Xr au_stream 3 ,
.Xr au_token 3 ,
.Xr au_user 3 ,
.Xr audit_submit 3 ,
.Xr audit_class 5 ,
.Xr audit_control 5
.Sh HISTORY
The OpenBSM implementation was created by McAfee Research, the security
division of McAfee Inc., under contract to Apple Computer, Inc., in 2004.
It was subsequently adopted by the TrustedBSD Project as the foundation for
the OpenBSM distribution.
.Sh AUTHORS
.An -nosplit
This software was created by
.An Robert Watson ,
.An Wayne Salamon ,
and
.An Suresh Krishnaswamy
for McAfee Research, the security research division of McAfee,
Inc., under contract to Apple Computer, Inc.
.Pp
The Basic Security Module (BSM) interface to audit records and audit event
stream format were defined by Sun Microsystems.
.Sh BUGS
Bugs would not be unlikely.
.Pp
The
.Nm
library implementations are generally thread-safe, but not reentrant.
.Pp
The assignment of routines to classes could use some work, as it is
decidely ad hoc.
For example,
.Fn au_read_rec
should probably be considered a stream routine.

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