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.\"-
.\" Copyright (c) 2000, 2009 Robert N. M. Watson
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND 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 THE AUTHOR OR 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.
.\"
.\" $FreeBSD$
.\"
.Dd April 15, 2014
.Dt POSIX1E 3
.Os
.Sh NAME
.Nm posix1e
.Nd introduction to the POSIX.1e security API
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/acl.h
.In sys/mac.h
.Sh DESCRIPTION
POSIX.1e describes five security extensions to the POSIX.1 API: Access
Control Lists (ACLs), Auditing, Capabilities, Mandatory Access Control, and
Information Flow Labels.
While IEEE POSIX.1e D17 specification has not been standardized, several of
its interfaces are widely used.
.Pp
.Fx
implements POSIX.1e interface for access control lists, described in
.Xr acl 3 ,
and supports ACLs on the
.Xr ffs 7
file system; ACLs must be administratively enabled using
.Xr tunefs 8 .
.Pp
.Fx
implements a POSIX.1e-like mandatory access control interface, described in
.Xr mac 3 ,
although with a number of extensions and important semantic differences.
.Pp
.Fx
does not implement the POSIX.1e audit, privilege (capability), or information
flow label APIs.
However,
.Fx
does implement the
.Xr libbsm
audit API.
It also provides
.Xr capsicum 4 ,
a lightweight OS capability and sandbox framework implementing a
hybrid capability system model.
.Sh ENVIRONMENT
POSIX.1e assigns security attributes to all objects, extending the security
functionality described in POSIX.1.
These additional attributes store fine-grained discretionary access control
information and mandatory access control labels; for files, they are stored
in extended attributes, described in
.Xr extattr 3 .
.Pp
POSIX.2c describes
a set of userland utilities for manipulating these attributes, including
.Xr getfacl 1
and
.Xr setfacl 1
for access control lists, and
.Xr getfmac 8
and
.Xr setfmac 8
for mandatory access control labels.
.Sh SEE ALSO
.Xr getfacl 1 ,
.Xr setfacl 1 ,
.Xr extattr 2 ,
.Xr acl 3 ,
.Xr extattr 3 ,
.Xr libcapsicum 3 ,
.Xr libbsm 3 ,
.Xr mac 3 ,
.Xr capsicum 4 ,
.Xr ffs 7 ,
.Xr getfmac 8 ,
.Xr setfmac 8 ,
.Xr tunefs 8 ,
.Xr acl 9 ,
.Xr extattr 9 ,
.Xr mac 9
.Sh STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17.
.Sh HISTORY
POSIX.1e support was introduced in
.Fx 4.0 ;
most features were available as of
.Fx 5.0 .
.Sh AUTHORS
.An Robert N M Watson
.An Chris D. Faulhaber
.An Thomas Moestl
.An Ilmar S Habibulin
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