freebsd-nq/contrib/openbsm/libbsm/libbsm.3

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.\" Copyright (c) 2005-2006 Robert N. M. Watson
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Vendor branch import of TrustedBSD OpenBSM 1.0 alpha 6: - Use AU_TO_WRITE and AU_NO_TO_WRITE for the 'keep' argument to au_close(); previously we used hard-coded 0 and 1 values. - Add man page for au_open(), au_write(), au_close(), and au_close_buffer(). - Support a more complete range of data types for the arbitrary data token: add AUR_CHAR (alias to AUR_BYTE), remove AUR_LONG, add AUR_INT32 (alias to AUR_INT), add AUR_INT64. - Add au_close_token(), which allows writing a single token_t to a memory buffer. Not likely to be used much by applications, but useful for writing test tools. - Modify au_to_file() so that it accepts a timeval in user space, not just kernel -- this is not a Solaris BSM API so can be modified without causing compatibility issues. - Define a new API, au_to_header32_tm(), which adds a struct timeval argument to the ordinary au_to_header32(), which is now implemented by wrapping au_to_header32_tm() and calling gettimeofday(). #ifndef KERNEL the APIs that invoke gettimeofday(), rather than having a variable definition. Don't try to retrieve time zone information using gettimeofday(), as it's not needed, and introduces possible failure modes. - Don't perform byte order transformations on the addr/machine fields of the terminal ID that appears in the process32/subject32 tokens. These are assumed to be IP addresses, and as such, to be in network byte order. - Universally, APIs now assume that IP addresses and ports are provided in network byte order. APIs now generally provide these types in network byte order when decoding. - Beginnings of an OpenBSM test framework can now be found in openbsm/test. This code is not built or installed by default. - auditd now assigns more appropriate syslog levels to its debugging and error information. - Support for audit filters introduced: audit filters are dynamically loaded shared objects that run in the context of a new daemon, auditfilterd. The daemon reads from an audit pipe and feeds both BSM and parsed versions of records to shared objects using a module API. This will provide a framework for the writing of intrusion detection services. - New utility API, audit_submit(), added to capture common elements of audit record submission for many applications. Obtained from: TrustedBSD Project
2006-06-05 10:52:12 +00:00
.\" $P4: //depot/projects/trustedbsd/openbsm/libbsm/libbsm.3#5 $
.\"
.Dd April 19, 2005
.Dt LIBBSM 3
.Os
.Sh NAME
.Nm libbsm
.Nd "Basic Security Module (BSM) Audit API"
.Sh LIBRARY
.Lb libbsm
.Sh SYNOPSIS
.In 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
.Nm
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 ,
.Xr au_user 3
man pages.
.Ss Audit Event Stream Interfaces
Audit event stream interfaces support interaction with file-backed audit
event streams:
.Xr au_close 3 .
.Xr au_free_token 3 ,
.Xr au_open 3 ,
.Xr au_write 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 getacflg 3 ,
.Xr getacmin 3 ,
.Xr getacna 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_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 .
.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 .
.Sh SEE ALSO
.Xr au_class 3 ,
.Xr au_mask 3 ,
.Xr au_notify 3 ,
.Xr au_stream 3 ,
.Xr au_token 3 ,
.Xr au_user 3 ,
.Xr audit_class 5 ,
.Xr audit_control 5
.Sh AUTHORS
This software was created by Robert Watson, Wayne Salamon, and 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 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 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.