1138568Ssam/*- 2178354Ssam * Copyright (c) 2002-2008 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 * 14138568Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15138568Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16138568Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17138568Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18138568Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19138568Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20138568Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21138568Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22138568Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23138568Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24138568Ssam */ 25138568Ssam 26138568Ssam#include <sys/cdefs.h> 27138568Ssam__FBSDID("$FreeBSD$"); 28138568Ssam 29138568Ssam/* 30138568Ssam * IEEE 802.11 NULL crypto support. 31138568Ssam */ 32178354Ssam#include "opt_wlan.h" 33178354Ssam 34138568Ssam#include <sys/param.h> 35283614Sglebius#include <sys/kernel.h> 36295126Sglebius#include <sys/malloc.h> 37283567Sglebius#include <sys/systm.h> 38138568Ssam#include <sys/mbuf.h> 39138568Ssam#include <sys/module.h> 40138568Ssam 41138568Ssam#include <sys/socket.h> 42138568Ssam 43138568Ssam#include <net/if.h> 44138568Ssam#include <net/if_media.h> 45138568Ssam#include <net/ethernet.h> 46138568Ssam 47138568Ssam#include <net80211/ieee80211_var.h> 48138568Ssam 49178354Ssamstatic void *none_attach(struct ieee80211vap *, struct ieee80211_key *); 50138568Ssamstatic void none_detach(struct ieee80211_key *); 51138568Ssamstatic int none_setkey(struct ieee80211_key *); 52288526Sadrianstatic void none_setiv(struct ieee80211_key *, uint8_t *); 53288523Sadrianstatic int none_encap(struct ieee80211_key *, struct mbuf *); 54147252Ssamstatic int none_decap(struct ieee80211_key *, struct mbuf *, int); 55147045Ssamstatic int none_enmic(struct ieee80211_key *, struct mbuf *, int); 56147045Ssamstatic int none_demic(struct ieee80211_key *, struct mbuf *, int); 57138568Ssam 58138568Ssamconst struct ieee80211_cipher ieee80211_cipher_none = { 59138568Ssam .ic_name = "NONE", 60138568Ssam .ic_cipher = IEEE80211_CIPHER_NONE, 61138568Ssam .ic_header = 0, 62138568Ssam .ic_trailer = 0, 63138568Ssam .ic_miclen = 0, 64138568Ssam .ic_attach = none_attach, 65138568Ssam .ic_detach = none_detach, 66138568Ssam .ic_setkey = none_setkey, 67288526Sadrian .ic_setiv = none_setiv, 68138568Ssam .ic_encap = none_encap, 69138568Ssam .ic_decap = none_decap, 70138568Ssam .ic_enmic = none_enmic, 71138568Ssam .ic_demic = none_demic, 72138568Ssam}; 73138568Ssam 74138568Ssamstatic void * 75178354Ssamnone_attach(struct ieee80211vap *vap, struct ieee80211_key *k) 76138568Ssam{ 77178354Ssam return vap; /* 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 93288526Sadrianstatic void 94288526Sadriannone_setiv(struct ieee80211_key *k, uint8_t *ivp) 95288526Sadrian{ 96288526Sadrian} 97288526Sadrian 98138568Ssamstatic int 99288523Sadriannone_encap(struct ieee80211_key *k, struct mbuf *m) 100138568Ssam{ 101178354Ssam struct ieee80211vap *vap = k->wk_private; 102138568Ssam#ifdef IEEE80211_DEBUG 103138568Ssam struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 104288523Sadrian uint8_t keyid; 105138568Ssam 106288523Sadrian keyid = ieee80211_crypto_get_keyid(vap, k); 107288523Sadrian 108138568Ssam /* 109138568Ssam * The specified key is not setup; this can 110138568Ssam * happen, at least, when changing keys. 111138568Ssam */ 112178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1, 113288523Sadrian "key id %u is not set (encap)", keyid); 114300232Savos#endif 115178354Ssam vap->iv_stats.is_tx_badcipher++; 116138568Ssam return 0; 117138568Ssam} 118138568Ssam 119138568Ssamstatic int 120147252Ssamnone_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen) 121138568Ssam{ 122178354Ssam struct ieee80211vap *vap = k->wk_private; 123138568Ssam#ifdef IEEE80211_DEBUG 124138568Ssam struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 125170530Ssam const uint8_t *ivp = (const uint8_t *)&wh[1]; 126138568Ssam#endif 127138568Ssam 128138568Ssam /* 129138568Ssam * The specified key is not setup; this can 130138568Ssam * happen, at least, when changing keys. 131138568Ssam */ 132138568Ssam /* XXX useful to know dst too */ 133178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 134178354Ssam "key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6); 135178354Ssam vap->iv_stats.is_rx_badkeyid++; 136138568Ssam return 0; 137138568Ssam} 138138568Ssam 139138568Ssamstatic int 140147045Ssamnone_enmic(struct ieee80211_key *k, struct mbuf *m, int force) 141138568Ssam{ 142178354Ssam struct ieee80211vap *vap = k->wk_private; 143138568Ssam 144178354Ssam vap->iv_stats.is_tx_badcipher++; 145138568Ssam return 0; 146138568Ssam} 147138568Ssam 148138568Ssamstatic int 149147045Ssamnone_demic(struct ieee80211_key *k, struct mbuf *m, int force) 150138568Ssam{ 151178354Ssam struct ieee80211vap *vap = k->wk_private; 152138568Ssam 153178354Ssam vap->iv_stats.is_rx_badkeyid++; 154138568Ssam return 0; 155138568Ssam} 156