xref: /illumos-gate/usr/src/uts/common/io/net80211/net80211_crypto_none.c (revision 2d6eb4a5e0a47d30189497241345dc5466bb68ab)
1 /*
2  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*
7  * Copyright (c) 2001 Atsushi Onoe
8  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. The name of the author may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * Alternatively, this software may be distributed under the terms of the
23  * GNU General Public License ("GPL") version 2 as published by the Free
24  * Software Foundation.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  */
37 
38 /*
39  * IEEE 802.11 NULL crypto support.
40  */
41 #include "net80211_impl.h"
42 
43 static	void *none_attach(struct ieee80211com *, struct ieee80211_key *);
44 static	void none_detach(struct ieee80211_key *);
45 static	int none_setkey(struct ieee80211_key *);
46 static	int none_encap(struct ieee80211_key *, mblk_t *, uint8_t);
47 static	int none_decap(struct ieee80211_key *, mblk_t *, int);
48 static	int none_enmic(struct ieee80211_key *, mblk_t *, int);
49 static	int none_demic(struct ieee80211_key *, mblk_t *, int);
50 
51 const struct ieee80211_cipher ieee80211_cipher_none = {
52 	"NONE",
53 	IEEE80211_CIPHER_NONE,
54 	0,
55 	0,
56 	0,
57 	none_attach,
58 	none_detach,
59 	none_setkey,
60 	none_encap,
61 	none_decap,
62 	none_enmic,
63 	none_demic,
64 };
65 
66 /* ARGSUSED */
67 static void *
none_attach(struct ieee80211com * ic,struct ieee80211_key * k)68 none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
69 {
70 	return (ic);		/* for diagnostics+stats */
71 }
72 
73 /* ARGSUSED */
74 static void
none_detach(struct ieee80211_key * k)75 none_detach(struct ieee80211_key *k)
76 {
77 	/* noop */
78 }
79 
80 /* ARGSUSED */
81 static int
none_setkey(struct ieee80211_key * k)82 none_setkey(struct ieee80211_key *k)
83 {
84 	return (1);
85 }
86 
87 /* ARGSUSED */
88 static int
none_encap(struct ieee80211_key * k,mblk_t * mp,uint8_t keyid)89 none_encap(struct ieee80211_key *k, mblk_t *mp, uint8_t keyid)
90 {
91 	/*
92 	 * The specified key is not setup; this can
93 	 * happen, at least, when changing keys.
94 	 */
95 	ieee80211_dbg(IEEE80211_MSG_CRYPTO, "none_encap: "
96 		"key id %u is not set (encap)\n", keyid >> 6);
97 	return (0);
98 }
99 
100 /* ARGSUSED */
101 static int
none_decap(struct ieee80211_key * k,mblk_t * mp,int hdrlen)102 none_decap(struct ieee80211_key *k, mblk_t *mp, int hdrlen)
103 {
104 	struct ieee80211_frame *wh = (struct ieee80211_frame *)mp->b_rptr;
105 	const uint8_t *ivp = (const uint8_t *)&wh[1];
106 
107 	/*
108 	 * The specified key is not setup; this can
109 	 * happen, at least, when changing keys.
110 	 */
111 	ieee80211_dbg(IEEE80211_MSG_CRYPTO, "none_decap"
112 		"key id %u is not set (decap)\n",
113 		ivp[IEEE80211_WEP_IVLEN] >> 6);
114 	return (0);
115 }
116 
117 /* ARGSUSED */
118 static int
none_enmic(struct ieee80211_key * k,mblk_t * mp,int force)119 none_enmic(struct ieee80211_key *k, mblk_t *mp, int force)
120 {
121 	return (0);
122 }
123 
124 /* ARGSUSED */
125 static int
none_demic(struct ieee80211_key * k,mblk_t * mp,int force)126 none_demic(struct ieee80211_key *k, mblk_t *mp, int force)
127 {
128 	return (0);
129 }
130