1.\" 2.\" Copyright (c) 2004 Bruce M. Simpson <bms@spc.org> 3.\" Copyright (c) 2004 Darron Broad <darron@kewl.org> 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" $Id: ieee80211_crypto.9,v 1.3 2004/03/04 10:42:56 bruce Exp $ 29.\" 30.Dd March 2, 2004 31.Dt IEEE80211_CRYPTO 9 32.Os 33.Sh NAME 34.Nm ieee80211_crypto_attach , ieee80211_crypto_detach , ieee80211_wep_crypt 35.Nd 802.11 WEP encryption functions 36.Sh SYNOPSIS 37.Ft void 38.Fn ieee80211_crypto_attach "struct ifnet *ifp" 39.Ft void 40.Fn ieee80211_crypto_detach "struct ifnet *ifp" 41.Ft struct mbuf * 42.Fn ieee80211_wep_crypt "struct ifnet *ifp" "struct mbuf *m0" "int txflag" 43.Sh DESCRIPTION 44These functions provide software encryption support 45for 802.11 device drivers. 46.Pp 47.\" 48The 49.Fn ieee80211_crypto_attach 50function initializes crypto support for the interface 51.Fa ifp , 52and sets the initialization vector (IV) for WEP encryption to 53a random number derived from a secure PRNG. 54.Pp 55.\" 56The 57.Fn ieee80211_crypto_detach 58function frees data structures associated with crypto support 59for the interface 60.Fa ifp . 61.Pp 62.\" 63The 64.Fn ieee80211_wep_crypt 65function runs the appropriate WEP encryption algorithm over the 802.11 66encapsulated frame held in the mbuf chain 67.Fa m0 , 68for transmission or reception on the interface 69.Fa ifp . 70The 71.Fa txflag 72argument specifies whether the frame is being received or transmitted. 73A value of 0 indicates that the frame is being received and should 74therefore be decrypted; a non-zero value indicates that the frame 75is being transmitted 76and should be encrypted. 77.\" 78.Sh IMPLEMENTATION NOTES 79The 80.Fn ieee80211_wep_crypt 81function stores its IV in the interface's embedded 82.Vt struct ieee80211com 83instance. 84.Sh SEE ALSO 85.Xr awi 4 , 86.Xr wi 4 , 87.Xr arc4random 9 , 88.Xr ieee80211 9 , 89.Xr ifnet 9 90.Sh HISTORY 91The 92.Nm ieee80211 93series of functions first appeared in 94.Nx 1.5 , 95and were later ported to 96.Fx 4.6 . 97.Sh AUTHORS 98.An -nosplit 99This manual page was written by 100.An Bruce M. Simpson Aq bms@FreeBSD.org 101and 102.An Darron Broad Aq darron@kewl.org . 103