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 May 20, 2009 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/capability.h 40.In sys/mac.h 41.Sh DESCRIPTION 42The IEEE POSIX.1e specification never left draft form, but the interfaces 43it describes are now widely used despite inherent limitations. 44Currently, only a few of the interfaces and features are implemented in 45.Fx , 46although efforts are underway to complete the integration at this time. 47.Pp 48POSIX.1e describes five security extensions to the base POSIX.1 API: 49Access Control Lists (ACLs), Auditing, Capabilities, Mandatory Access 50Control, and Information Flow Labels. 51.Fx 52supports POSIX.1e ACL interfaces, as well as POSIX.1e-like MAC 53interfaces. 54The TrustedBSD Project has produced but not integrated an implementation 55of POSIX.1e Capabilities. 56.Pp 57POSIX.1e defines both syntax and semantics for these features, but fairly 58substantial changes are required to implement these features in the 59operating system. 60.Pp 61As shipped, 62.Fx 4.0 63provides API and VFS support for ACLs, but not an implementation on any 64native file system. 65.Fx 5.0 66includes support for ACLs as part of UFS1 and UFS2, as well as necessary 67VFS support for additional file systems to export ACLs as appropriate. 68Available API calls relating to ACLs are described in detail in 69.Xr acl 3 . 70.Pp 71As shipped, 72.Fx 5.0 73includes support for Mandatory Access Control as well as POSIX.1e-like 74APIs for label management. 75More information on API calls relating to MAC is available in 76.Xr mac 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, and many of these features are considered new 86or experimental. 87.Sh ENVIRONMENT 88POSIX.1e assigns security labels to all objects, extending the security 89functionality described in POSIX.1. 90These additional labels provide 91fine-grained discretionary access control, fine-grained capabilities, 92and labels necessary for mandatory access control. 93POSIX.2c describes 94a set of userland utilities for manipulating these labels. 95.Pp 96Many of these services are supported by extended attributes, documented 97in 98.Xr extattr 2 99and 100.Xr extattr 9 . 101While these APIs are not documented in POSIX.1e, they are similar in 102structure. 103.Sh SEE ALSO 104.Xr extattr 2 , 105.Xr acl 3 , 106.Xr libbsm 3 , 107.Xr mac 3 , 108.Xr acl 9 , 109.Xr extattr 9 , 110.Xr mac 9 111.Sh STANDARDS 112POSIX.1e is described in IEEE POSIX.1e draft 17. 113Discussion of the draft continues 114on the cross-platform POSIX.1e implementation 115mailing list. 116To join this list, see the 117.Fx 118POSIX.1e implementation 119page for more information. 120.Sh HISTORY 121POSIX.1e support was introduced in 122.Fx 4.0 ; 123most of the features are available as of 124.Fx 5.0 . 125Development continues. 126.Sh AUTHORS 127.An Robert N M Watson 128.An Chris D. Faulhaber 129.An Thomas Moestl 130.An Ilmar S Habibulin 131.Sh BUGS 132Many of these features are considered new or experimental in 133.Fx 5.0 134and should be deployed with appropriate caution. 135