1 /* $NetBSD: ieee80211_crypto_none.c,v 1.8 2018/01/19 07:53:46 maxv Exp $ */ 2 3 /* 4 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * Alternatively, this software may be distributed under the terms of the 19 * GNU General Public License ("GPL") version 2 as published by the Free 20 * Software Foundation. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #ifdef __FreeBSD__ 36 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_crypto_none.c,v 1.5 2005/06/10 16:11:24 sam Exp $"); 37 #endif 38 #ifdef __NetBSD__ 39 __KERNEL_RCSID(0, "$NetBSD: ieee80211_crypto_none.c,v 1.8 2018/01/19 07:53:46 maxv Exp $"); 40 #endif 41 42 /* 43 * IEEE 802.11 NULL crypto support. 44 */ 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/mbuf.h> 48 49 #include <sys/socket.h> 50 51 #include <net/if.h> 52 #include <net/if_ether.h> 53 #include <net/if_media.h> 54 55 #include <net80211/ieee80211_var.h> 56 57 static void *none_attach(struct ieee80211com *, struct ieee80211_key *); 58 static void none_detach(struct ieee80211_key *); 59 static int none_setkey(struct ieee80211_key *); 60 static int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t); 61 static int none_decap(struct ieee80211_key *, struct mbuf *, int); 62 static int none_enmic(struct ieee80211_key *, struct mbuf *, int); 63 static int none_demic(struct ieee80211_key *, struct mbuf *, int); 64 65 const struct ieee80211_cipher ieee80211_cipher_none = { 66 .ic_name = "NONE", 67 .ic_cipher = IEEE80211_CIPHER_NONE, 68 .ic_header = 0, 69 .ic_trailer = 0, 70 .ic_miclen = 0, 71 .ic_attach = none_attach, 72 .ic_detach = none_detach, 73 .ic_setkey = none_setkey, 74 .ic_encap = none_encap, 75 .ic_decap = none_decap, 76 .ic_enmic = none_enmic, 77 .ic_demic = none_demic, 78 }; 79 80 static void * 81 none_attach(struct ieee80211com *ic, struct ieee80211_key *k) 82 { 83 return ic; /* for diagnostics+stats */ 84 } 85 86 static void 87 none_detach(struct ieee80211_key *k) 88 { 89 (void) k; 90 } 91 92 static int 93 none_setkey(struct ieee80211_key *k) 94 { 95 (void) k; 96 return 1; 97 } 98 99 static int 100 none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid) 101 { 102 struct ieee80211com *ic = k->wk_private; 103 #ifdef IEEE80211_DEBUG 104 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 105 #endif 106 107 /* 108 * The specified key is not setup; this can 109 * happen, at least, when changing keys. 110 */ 111 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 112 "[%s] key id %u is not set (encap)\n", 113 ether_sprintf(wh->i_addr1), keyid>>6); 114 ic->ic_stats.is_tx_badcipher++; 115 return 0; 116 } 117 118 static int 119 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen) 120 { 121 struct ieee80211com *ic = k->wk_private; 122 #ifdef IEEE80211_DEBUG 123 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 124 const u_int8_t *ivp = (const u_int8_t *)&wh[1]; 125 #endif 126 127 /* 128 * The specified key is not setup; this can 129 * happen, at least, when changing keys. 130 */ 131 /* XXX useful to know dst too */ 132 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 133 "[%s] key id %u is not set (decap)\n", 134 ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6); 135 ic->ic_stats.is_rx_badkeyid++; 136 return 0; 137 } 138 139 static int 140 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force) 141 { 142 struct ieee80211com *ic = k->wk_private; 143 144 ic->ic_stats.is_tx_badcipher++; 145 return 0; 146 } 147 148 static int 149 none_demic(struct ieee80211_key *k, struct mbuf *m, int force) 150 { 151 struct ieee80211com *ic = k->wk_private; 152 153 ic->ic_stats.is_rx_badkeyid++; 154 return 0; 155 } 156