d97fcfce27
kernel access control. Extensions to libc to provide basic MAC label manipulation facilities for userland. These interface will be replaced in the next month or two with more flexible interfaces, but provide sufficient support to allow use of the Biba and MLS policies for user applications. libc_r wrappers to follow. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
141 lines
4.4 KiB
Groff
141 lines
4.4 KiB
Groff
.\" Copyright (c) 2001 Networks Associates Technology, Inc.
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.\" All rights reserved.
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.\"
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.\" This software was developed for the FreeBSD Project by Chris
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.\" Costello at Safeport Network Services and NAI Labs, the Security
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.\" Research Division of Network Associates, Inc. under DARPA/SPAWAR
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.\" contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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.\" research program.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote
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.\" products derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd December 21, 2001
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.Dt MAC 3
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.Sh NAME
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.Nm mac
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.Nd introduction to the POSIX.1e MAC security API
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/mac.h
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.Pp
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In the kernel configuration file:
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.Cd "options MAC"
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.Sh DESCRIPTION
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.Fx
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permits administrators to define Mandatory Access Control labels
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defining levels for the privacy and integrity of data,
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overriding discretionary policies
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for those objects.
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Not all objects currently provide support for MAC labels,
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and MAC support must be explicitly enabled by the administrator.
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The library calls include routines to retrieve, duplicate,
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and set MAC labels associated with files and processes.
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.Pp
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POSIX.1e describes a set of MAC manipulation routines
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to manage the contents of MAC labels,
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as well as their relationships with
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files and processes;
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almost all of these support routines
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are implemented in
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.Fx .
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.Pp
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Available functions, sorted by behavior, include:
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.Bl -tag -width indent
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.It Fn mac_get_fd
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This function is described in
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.Xr mac_get 3 ,
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and may be used to retrieve the
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MAC label associated with
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a specific file descriptor.
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.It Fn mac_get_file
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This function is described in
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.Xr mac_get 3 ,
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and may be used to retrieve the
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MAC label associated with
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a named file.
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.It Fn mac_get_proc
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This function is described in
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.Xr mac_get 3 ,
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and may be used to retrieve the
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MAC label associated with
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the calling process.
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.It Fn mac_set_fd
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This function is described in
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.Xr mac_set 3 ,
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and may be used to set the
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MAC label associated with
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a specific file descriptor.
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.It Fn mac_set_file
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This function is described in
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.Xr mac_set 3 ,
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and may be used to set the
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MAC label associated with
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a named file.
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.It Fn mac_set_proc
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This function is described in
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.Xr mac_set 3 ,
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and may be used to set the
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MAC label associated with
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the calling process.
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.It Fn mac_free
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This function is described in
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.Xr mac_free 3 ,
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and may be used to free
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userland working MAC label storage.
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.It Fn mac_from_text
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This function is described in
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.Xr mac_text 3 ,
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and may be used to convert
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a text-form MAC label
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into a working
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.Vt mac_t .
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.It Fn mac_to_text
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This function is described in
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.Xr mac_text 3 ,
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and may be used to convert a
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.Vt mac_t
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into a text-form MAC label.
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.El
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.Sh IMPLEMENTATION NOTES
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.Fx Ns 's
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support for POSIX.1e interfaces and features
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is still under development
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at this time.
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.Sh SEE ALSO
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.Xr mac_free 3 ,
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.Xr mac_get 3 ,
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.Xr mac_set 3 ,
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.Xr mac_text 3
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.Sh STANDARDS
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POSIX.1e is described in IEEE POSIX.1e draft 17.
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Discussion of the draft
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continues on the cross-platform POSIX.1e implementation mailing list.
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To join this list, see the
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.Fx
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POSIX.1e implementation page
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for more information.
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