/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* IEEE 802.11 NULL crypto support.
*/
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
static void *none_attach(struct ieee80211vap *, struct ieee80211_key *);
static void none_detach(struct ieee80211_key *);
static int none_setkey(struct ieee80211_key *);
static void none_setiv(struct ieee80211_key *, uint8_t *);
static int none_encap(struct ieee80211_key *, struct mbuf *);
static int none_decap(struct ieee80211_key *, struct mbuf *, int);
static int none_enmic(struct ieee80211_key *, struct mbuf *, int);
static int none_demic(struct ieee80211_key *, struct mbuf *, int);
const struct ieee80211_cipher ieee80211_cipher_none = {
.ic_name = "NONE",
.ic_cipher = IEEE80211_CIPHER_NONE,
.ic_header = 0,
.ic_trailer = 0,
.ic_miclen = 0,
.ic_attach = none_attach,
.ic_detach = none_detach,
.ic_setkey = none_setkey,
.ic_setiv = none_setiv,
.ic_encap = none_encap,
.ic_decap = none_decap,
.ic_enmic = none_enmic,
.ic_demic = none_demic,
};
static void *
none_attach(struct ieee80211vap *vap, struct ieee80211_key *k)
{
return vap; /* for diagnostics+stats */
}
static void
none_detach(struct ieee80211_key *k)
{
(void) k;
}
static int
none_setkey(struct ieee80211_key *k)
{
(void) k;
return 1;
}
static void
none_setiv(struct ieee80211_key *k, uint8_t *ivp)
{
}
static int
none_encap(struct ieee80211_key *k, struct mbuf *m)
{
struct ieee80211vap *vap = k->wk_private;
#ifdef IEEE80211_DEBUG
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
uint8_t keyid;
keyid = ieee80211_crypto_get_keyid(vap, k);
/*
* The specified key is not setup; this can
* happen, at least, when changing keys.
*/
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1,
"key id %u is not set (encap)", keyid);
#endif
vap->iv_stats.is_tx_badcipher++;
return 0;
}
static int
none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
{
struct ieee80211vap *vap = k->wk_private;
#ifdef IEEE80211_DEBUG
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
const uint8_t *ivp = (const uint8_t *)&wh[1];
#endif
/*
* The specified key is not setup; this can
* happen, at least, when changing keys.
*/
/* XXX useful to know dst too */
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
"key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6);
vap->iv_stats.is_rx_badkeyid++;
return 0;
}
static int
none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
{
struct ieee80211vap *vap = k->wk_private;
vap->iv_stats.is_tx_badcipher++;
return 0;
}
static int
none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
{
struct ieee80211vap *vap = k->wk_private;
vap->iv_stats.is_rx_badkeyid++;
return 0;
}
