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. 52.Fx 53supports POSIX.1e ACL interfaces, as well as POSIX.1e-like MAC 54interfaces. 55The TrustedBSD Project has produced but not integrated an implementation 56of POSIX.1e Capabilities. 57.Pp 58POSIX.1e defines both syntax and semantics for these features, but fairly 59substantial changes are required to implement these features in the 60operating system. 61.Pp 62As shipped, 63.Fx 4.0 64provides API and VFS support for ACLs, but not an implementation on any 65native file system. 66.Fx 5.0 67includes support for ACLs as part of UFS1 and UFS2, as well as necessary 68VFS support for additional file systems to export ACLs as appropriate. 69Available API calls relating to ACLs are described in detail in 70.Xr acl 3 . 71.Pp 72As shipped, 73.Fx 5.0 74includes support for Mandatory Access Control as well as POSIX.1e-like 75APIs for label management. 76More information on API calls relating to MAC is available in 77.Xr mac 3 . 78.Pp 79Additional patches supporting POSIX.1e features are provided by the 80TrustedBSD project: 81.Pp 82http://www.TrustedBSD.org/ 83.Sh IMPLEMENTATION NOTES 84.Fx Ns 's 85support for POSIX.1e interfaces and features is still under 86development at this time, and many of these features are considered new 87or experimental. 88.Sh ENVIRONMENT 89POSIX.1e assigns security labels to all objects, extending the security 90functionality described in POSIX.1. 91These additional labels provide 92fine-grained discretionary access control, fine-grained capabilities, 93and labels necessary for mandatory access control. 94POSIX.2c describes 95a set of userland utilities for manipulating these labels. 96.Pp 97Many of these services are supported by extended attributes, documented 98in 99.Xr extattr 2 100and 101.Xr extattr 9 . 102While these APIs are not documented in POSIX.1e, they are similar in 103structure. 104.Sh SEE ALSO 105.Xr extattr 2 , 106.Xr acl 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