2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 * IEEE 802.11 NULL crypto support.
36 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/systm.h>
41 #include <sys/module.h>
43 #include <sys/socket.h>
46 #include <net/if_media.h>
47 #include <net/ethernet.h>
49 #include <net80211/ieee80211_var.h>
51 static void *none_attach(struct ieee80211vap *, struct ieee80211_key *);
52 static void none_detach(struct ieee80211_key *);
53 static int none_setkey(struct ieee80211_key *);
54 static void none_setiv(struct ieee80211_key *, uint8_t *);
55 static int none_encap(struct ieee80211_key *, struct mbuf *);
56 static int none_decap(struct ieee80211_key *, struct mbuf *, int);
57 static int none_enmic(struct ieee80211_key *, struct mbuf *, int);
58 static int none_demic(struct ieee80211_key *, struct mbuf *, int);
60 const struct ieee80211_cipher ieee80211_cipher_none = {
62 .ic_cipher = IEEE80211_CIPHER_NONE,
66 .ic_attach = none_attach,
67 .ic_detach = none_detach,
68 .ic_setkey = none_setkey,
69 .ic_setiv = none_setiv,
70 .ic_encap = none_encap,
71 .ic_decap = none_decap,
72 .ic_enmic = none_enmic,
73 .ic_demic = none_demic,
77 none_attach(struct ieee80211vap *vap, struct ieee80211_key *k)
79 return vap; /* for diagnostics+stats */
83 none_detach(struct ieee80211_key *k)
89 none_setkey(struct ieee80211_key *k)
96 none_setiv(struct ieee80211_key *k, uint8_t *ivp)
101 none_encap(struct ieee80211_key *k, struct mbuf *m)
103 struct ieee80211vap *vap = k->wk_private;
104 #ifdef IEEE80211_DEBUG
105 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
108 keyid = ieee80211_crypto_get_keyid(vap, k);
111 * The specified key is not setup; this can
112 * happen, at least, when changing keys.
114 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1,
115 "key id %u is not set (encap)", keyid);
117 vap->iv_stats.is_tx_badcipher++;
122 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
124 struct ieee80211vap *vap = k->wk_private;
125 #ifdef IEEE80211_DEBUG
126 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
127 const uint8_t *ivp = (const uint8_t *)&wh[1];
131 * The specified key is not setup; this can
132 * happen, at least, when changing keys.
134 /* XXX useful to know dst too */
135 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
136 "key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6);
137 vap->iv_stats.is_rx_badkeyid++;
142 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
144 struct ieee80211vap *vap = k->wk_private;
146 vap->iv_stats.is_tx_badcipher++;
151 none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
153 struct ieee80211vap *vap = k->wk_private;
155 vap->iv_stats.is_rx_badkeyid++;