1.\"- 2.\" Copyright (c) 2000 Robert N. M. Watson 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd January 17, 2000 29.Dt POSIX1E 3 30.Os 31.Sh NAME 32.Nm posix1e 33.Nd introduction to the POSIX.1e security API 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In sys/types.h 38.In sys/acl.h 39.\" .In sys/audit.h 40.In sys/capability.h 41.In sys/mac.h 42.Sh DESCRIPTION 43The IEEE POSIX.1e specification never left draft form, but the interfaces 44it describes are now widely used despite inherent limitations. 45Currently, only a few of the interfaces and features are implemented in 46.Fx , 47although efforts are underway to complete the integration at this time. 48.Pp 49POSIX.1e describes five security extensions to the base POSIX.1 API: 50Access Control Lists (ACLs), Auditing, Capabilities, Mandatory Access 51Control, and Information Flow Labels. 52Of these, the ACL interfaces are 53currently included with 54.Fx , 55Auditing, Capabilities, and Mandatory 56Access Control are in the wings, and Information Flow Labels are not on 57the calendar. 58.Pp 59POSIX.1e defines both syntax and semantics for these features, but fairly 60substantial changes are required to implement these features in the 61operating system. 62As shipped, 63.Fx 4.0 64permits file systems to export 65Access Control Lists via the VFS, and provides a library for userland 66access to and manipulation of these ACLs, but support for ACLs is not 67provided by any file systems shipped in the base operating system. 68Available API calls relating to ACLs are described in detail in 69.Xr acl 3 . 70.Pp 71.Fx 72currently provides documentation and APIs for fine-grained capability 73support, but implementation is currently not included in the base 74system. 75Documentation of these API calls is provided in 76.Xr cap 3 . 77.Pp 78Additional patches supporting POSIX.1e features are provided by the 79TrustedBSD project: 80.Pp 81http://www.trustedbsd.org 82.Sh IMPLEMENTATION NOTES 83.Fx Ns 's 84support for POSIX.1e interfaces and features is still under 85development at this time. 86.Sh ENVIRONMENT 87POSIX.1e assigns security labels to all objects, extending the security 88functionality described in POSIX.1. 89These additional labels provide 90fine-grained discretionary access control, fine-grained capabilities, 91and labels necessary for mandatory access control. 92POSIX.2c describes 93a set of userland utilities for manipulating these labels. 94These userland 95utilities are not bundled with 96.Fx 4.0 97so as to discourage their 98use in the short term. 99.Sh SEE ALSO 100.Xr acl 3 , 101.Xr cap 3 , 102.Xr mac 3 , 103.Xr acl 9 , 104.Xr cap 9 , 105.Xr extattr 9 , 106.Xr mac 9 107.Sh STANDARDS 108POSIX.1e is described in IEEE POSIX.1e draft 17. 109Discussion of the draft continues 110on the cross-platform POSIX.1e implementation 111mailing list. 112To join this list, see the 113.Fx 114POSIX.1e implementation 115page for more information. 116.Sh HISTORY 117POSIX.1e support was introduced in 118.Fx 4.0 , 119and development continues. 120.Sh AUTHORS 121.An Robert N M Watson 122.An Chris D. Faulhaber 123.An Thomas Moestl 124.An Ilmar S Habibulin 125.Sh BUGS 126These features are not yet fully implemented. 127