ieee80211_crypto_none.c revision 147252
1138568Ssam/*- 2139530Ssam * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 3138568Ssam * All rights reserved. 4138568Ssam * 5138568Ssam * Redistribution and use in source and binary forms, with or without 6138568Ssam * modification, are permitted provided that the following conditions 7138568Ssam * are met: 8138568Ssam * 1. Redistributions of source code must retain the above copyright 9138568Ssam * notice, this list of conditions and the following disclaimer. 10138568Ssam * 2. Redistributions in binary form must reproduce the above copyright 11138568Ssam * notice, this list of conditions and the following disclaimer in the 12138568Ssam * documentation and/or other materials provided with the distribution. 13138568Ssam * 3. The name of the author may not be used to endorse or promote products 14138568Ssam * derived from this software without specific prior written permission. 15138568Ssam * 16138568Ssam * Alternatively, this software may be distributed under the terms of the 17138568Ssam * GNU General Public License ("GPL") version 2 as published by the Free 18138568Ssam * Software Foundation. 19138568Ssam * 20138568Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21138568Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22138568Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23138568Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24138568Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25138568Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26138568Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27138568Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28138568Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29138568Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30138568Ssam */ 31138568Ssam 32138568Ssam#include <sys/cdefs.h> 33138568Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_crypto_none.c 147252 2005-06-10 16:11:24Z sam $"); 34138568Ssam 35138568Ssam/* 36138568Ssam * IEEE 802.11 NULL crypto support. 37138568Ssam */ 38138568Ssam#include <sys/param.h> 39138568Ssam#include <sys/systm.h> 40138568Ssam#include <sys/mbuf.h> 41138568Ssam#include <sys/module.h> 42138568Ssam 43138568Ssam#include <sys/socket.h> 44138568Ssam 45138568Ssam#include <net/if.h> 46138568Ssam#include <net/if_media.h> 47138568Ssam#include <net/ethernet.h> 48138568Ssam 49138568Ssam#include <net80211/ieee80211_var.h> 50138568Ssam 51138568Ssamstatic void *none_attach(struct ieee80211com *, struct ieee80211_key *); 52138568Ssamstatic void none_detach(struct ieee80211_key *); 53138568Ssamstatic int none_setkey(struct ieee80211_key *); 54138568Ssamstatic int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t); 55147252Ssamstatic int none_decap(struct ieee80211_key *, struct mbuf *, int); 56147045Ssamstatic int none_enmic(struct ieee80211_key *, struct mbuf *, int); 57147045Ssamstatic int none_demic(struct ieee80211_key *, struct mbuf *, int); 58138568Ssam 59138568Ssamconst struct ieee80211_cipher ieee80211_cipher_none = { 60138568Ssam .ic_name = "NONE", 61138568Ssam .ic_cipher = IEEE80211_CIPHER_NONE, 62138568Ssam .ic_header = 0, 63138568Ssam .ic_trailer = 0, 64138568Ssam .ic_miclen = 0, 65138568Ssam .ic_attach = none_attach, 66138568Ssam .ic_detach = none_detach, 67138568Ssam .ic_setkey = none_setkey, 68138568Ssam .ic_encap = none_encap, 69138568Ssam .ic_decap = none_decap, 70138568Ssam .ic_enmic = none_enmic, 71138568Ssam .ic_demic = none_demic, 72138568Ssam}; 73138568Ssam 74138568Ssamstatic void * 75138568Ssamnone_attach(struct ieee80211com *ic, struct ieee80211_key *k) 76138568Ssam{ 77138568Ssam return ic; /* for diagnostics+stats */ 78138568Ssam} 79138568Ssam 80138568Ssamstatic void 81138568Ssamnone_detach(struct ieee80211_key *k) 82138568Ssam{ 83138568Ssam (void) k; 84138568Ssam} 85138568Ssam 86138568Ssamstatic int 87138568Ssamnone_setkey(struct ieee80211_key *k) 88138568Ssam{ 89138568Ssam (void) k; 90138568Ssam return 1; 91138568Ssam} 92138568Ssam 93138568Ssamstatic int 94138568Ssamnone_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid) 95138568Ssam{ 96138568Ssam struct ieee80211com *ic = k->wk_private; 97138568Ssam#ifdef IEEE80211_DEBUG 98138568Ssam struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 99138568Ssam#endif 100138568Ssam 101138568Ssam /* 102138568Ssam * The specified key is not setup; this can 103138568Ssam * happen, at least, when changing keys. 104138568Ssam */ 105138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 106139510Ssam "[%s] key id %u is not set (encap)\n", 107138568Ssam ether_sprintf(wh->i_addr1), keyid>>6); 108138568Ssam ic->ic_stats.is_tx_badcipher++; 109138568Ssam return 0; 110138568Ssam} 111138568Ssam 112138568Ssamstatic int 113147252Ssamnone_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen) 114138568Ssam{ 115138568Ssam struct ieee80211com *ic = k->wk_private; 116138568Ssam#ifdef IEEE80211_DEBUG 117138568Ssam struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 118138568Ssam const u_int8_t *ivp = (const u_int8_t *)&wh[1]; 119138568Ssam#endif 120138568Ssam 121138568Ssam /* 122138568Ssam * The specified key is not setup; this can 123138568Ssam * happen, at least, when changing keys. 124138568Ssam */ 125138568Ssam /* XXX useful to know dst too */ 126138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 127139510Ssam "[%s] key id %u is not set (decap)\n", 128138568Ssam ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6); 129138568Ssam ic->ic_stats.is_rx_badkeyid++; 130138568Ssam return 0; 131138568Ssam} 132138568Ssam 133138568Ssamstatic int 134147045Ssamnone_enmic(struct ieee80211_key *k, struct mbuf *m, int force) 135138568Ssam{ 136138568Ssam struct ieee80211com *ic = k->wk_private; 137138568Ssam 138138568Ssam ic->ic_stats.is_tx_badcipher++; 139138568Ssam return 0; 140138568Ssam} 141138568Ssam 142138568Ssamstatic int 143147045Ssamnone_demic(struct ieee80211_key *k, struct mbuf *m, int force) 144138568Ssam{ 145138568Ssam struct ieee80211com *ic = k->wk_private; 146138568Ssam 147138568Ssam ic->ic_stats.is_rx_badkeyid++; 148138568Ssam return 0; 149138568Ssam} 150