1 | /*- |
2 | * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting |
3 | * All rights reserved. |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. The name of the author may not be used to endorse or promote products |
14 | * derived from this software without specific prior written permission. |
15 | * |
16 | * Alternatively, this software may be distributed under the terms of the |
17 | * GNU General Public License ("GPL") version 2 as published by the Free |
18 | * Software Foundation. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
21 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
22 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
29 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | #ifdef __FreeBSD__ |
34 | __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_crypto_none.c,v 1.5 2005/06/10 16:11:24 sam Exp $" ); |
35 | #endif |
36 | #ifdef __NetBSD__ |
37 | __KERNEL_RCSID(0, "$NetBSD: ieee80211_crypto_none.c,v 1.7 2006/11/16 01:33:40 christos Exp $" ); |
38 | #endif |
39 | |
40 | /* |
41 | * IEEE 802.11 NULL crypto support. |
42 | */ |
43 | #include <sys/param.h> |
44 | #include <sys/systm.h> |
45 | #include <sys/mbuf.h> |
46 | |
47 | #include <sys/socket.h> |
48 | |
49 | #include <net/if.h> |
50 | #include <net/if_ether.h> |
51 | #include <net/if_media.h> |
52 | |
53 | #include <net80211/ieee80211_var.h> |
54 | |
55 | static void *none_attach(struct ieee80211com *, struct ieee80211_key *); |
56 | static void none_detach(struct ieee80211_key *); |
57 | static int none_setkey(struct ieee80211_key *); |
58 | static int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t); |
59 | static int none_decap(struct ieee80211_key *, struct mbuf *, int); |
60 | static int none_enmic(struct ieee80211_key *, struct mbuf *, int); |
61 | static int none_demic(struct ieee80211_key *, struct mbuf *, int); |
62 | |
63 | const struct ieee80211_cipher ieee80211_cipher_none = { |
64 | .ic_name = "NONE" , |
65 | .ic_cipher = IEEE80211_CIPHER_NONE, |
66 | .ic_header = 0, |
67 | .ic_trailer = 0, |
68 | .ic_miclen = 0, |
69 | .ic_attach = none_attach, |
70 | .ic_detach = none_detach, |
71 | .ic_setkey = none_setkey, |
72 | .ic_encap = none_encap, |
73 | .ic_decap = none_decap, |
74 | .ic_enmic = none_enmic, |
75 | .ic_demic = none_demic, |
76 | }; |
77 | |
78 | static void * |
79 | none_attach(struct ieee80211com *ic, struct ieee80211_key *k) |
80 | { |
81 | return ic; /* for diagnostics+stats */ |
82 | } |
83 | |
84 | static void |
85 | none_detach(struct ieee80211_key *k) |
86 | { |
87 | (void) k; |
88 | } |
89 | |
90 | static int |
91 | none_setkey(struct ieee80211_key *k) |
92 | { |
93 | (void) k; |
94 | return 1; |
95 | } |
96 | |
97 | static int |
98 | none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid) |
99 | { |
100 | struct ieee80211com *ic = k->wk_private; |
101 | #ifdef IEEE80211_DEBUG |
102 | struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); |
103 | #endif |
104 | |
105 | /* |
106 | * The specified key is not setup; this can |
107 | * happen, at least, when changing keys. |
108 | */ |
109 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, |
110 | "[%s] key id %u is not set (encap)\n" , |
111 | ether_sprintf(wh->i_addr1), keyid>>6); |
112 | ic->ic_stats.is_tx_badcipher++; |
113 | return 0; |
114 | } |
115 | |
116 | static int |
117 | none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen) |
118 | { |
119 | struct ieee80211com *ic = k->wk_private; |
120 | #ifdef IEEE80211_DEBUG |
121 | struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); |
122 | const u_int8_t *ivp = (const u_int8_t *)&wh[1]; |
123 | #endif |
124 | |
125 | /* |
126 | * The specified key is not setup; this can |
127 | * happen, at least, when changing keys. |
128 | */ |
129 | /* XXX useful to know dst too */ |
130 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, |
131 | "[%s] key id %u is not set (decap)\n" , |
132 | ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6); |
133 | ic->ic_stats.is_rx_badkeyid++; |
134 | return 0; |
135 | } |
136 | |
137 | static int |
138 | none_enmic(struct ieee80211_key *k, struct mbuf *m, int force) |
139 | { |
140 | struct ieee80211com *ic = k->wk_private; |
141 | |
142 | ic->ic_stats.is_tx_badcipher++; |
143 | return 0; |
144 | } |
145 | |
146 | static int |
147 | none_demic(struct ieee80211_key *k, struct mbuf *m, int force) |
148 | { |
149 | struct ieee80211com *ic = k->wk_private; |
150 | |
151 | ic->ic_stats.is_rx_badkeyid++; |
152 | return 0; |
153 | } |
154 | |