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Import FreeBSD's net80211(9) of 2005-05-18

This commit is contained in:
dyoung 2005-06-21 20:37:38 +00:00
parent 098f26dce7
commit 3cdc4fcd5f
9 changed files with 3405 additions and 18 deletions
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188
sys/net80211/_ieee80211.h Normal file
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/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/_ieee80211.h,v 1.2 2004/12/31 22:42:38 sam Exp $
*/
#ifndef _NET80211__IEEE80211_H_
#define _NET80211__IEEE80211_H_
enum ieee80211_phytype {
IEEE80211_T_DS, /* direct sequence spread spectrum */
IEEE80211_T_FH, /* frequency hopping */
IEEE80211_T_OFDM, /* frequency division multiplexing */
IEEE80211_T_TURBO, /* high rate OFDM, aka turbo mode */
};
#define IEEE80211_T_CCK IEEE80211_T_DS /* more common nomenclature */
/* XXX not really a mode; there are really multiple PHY's */
enum ieee80211_phymode {
IEEE80211_MODE_AUTO = 0, /* autoselect */
IEEE80211_MODE_11A = 1, /* 5GHz, OFDM */
IEEE80211_MODE_11B = 2, /* 2GHz, CCK */
IEEE80211_MODE_11G = 3, /* 2GHz, OFDM */
IEEE80211_MODE_FH = 4, /* 2GHz, GFSK */
IEEE80211_MODE_TURBO_A = 5, /* 5GHz, OFDM, 2x clock */
IEEE80211_MODE_TURBO_G = 6, /* 2GHz, OFDM, 2x clock */
};
#define IEEE80211_MODE_MAX (IEEE80211_MODE_TURBO_G+1)
enum ieee80211_opmode {
IEEE80211_M_STA = 1, /* infrastructure station */
IEEE80211_M_IBSS = 0, /* IBSS (adhoc) station */
IEEE80211_M_AHDEMO = 3, /* Old lucent compatible adhoc demo */
IEEE80211_M_HOSTAP = 6, /* Software Access Point */
IEEE80211_M_MONITOR = 8 /* Monitor mode */
};
/*
* 802.11g protection mode.
*/
enum ieee80211_protmode {
IEEE80211_PROT_NONE = 0, /* no protection */
IEEE80211_PROT_CTSONLY = 1, /* CTS to self */
IEEE80211_PROT_RTSCTS = 2, /* RTS-CTS */
};
/*
* Authentication mode.
*/
enum ieee80211_authmode {
IEEE80211_AUTH_NONE = 0,
IEEE80211_AUTH_OPEN = 1, /* open */
IEEE80211_AUTH_SHARED = 2, /* shared-key */
IEEE80211_AUTH_8021X = 3, /* 802.1x */
IEEE80211_AUTH_AUTO = 4, /* auto-select/accept */
/* NB: these are used only for ioctls */
IEEE80211_AUTH_WPA = 5, /* WPA/RSN w/ 802.1x/PSK */
};
/*
* Roaming mode is effectively who controls the operation
* of the 802.11 state machine when operating as a station.
* State transitions are controlled either by the driver
* (typically when management frames are processed by the
* hardware/firmware), the host (auto/normal operation of
* the 802.11 layer), or explicitly through ioctl requests
* when applications like wpa_supplicant want control.
*/
enum ieee80211_roamingmode {
IEEE80211_ROAMING_DEVICE= 0, /* driver/hardware control */
IEEE80211_ROAMING_AUTO = 1, /* 802.11 layer control */
IEEE80211_ROAMING_MANUAL= 2, /* application control */
};
/*
* Channels are specified by frequency and attributes.
*/
struct ieee80211_channel {
u_int16_t ic_freq; /* setting in Mhz */
u_int16_t ic_flags; /* see below */
};
#define IEEE80211_CHAN_MAX 255
#define IEEE80211_CHAN_BYTES 32 /* howmany(IEEE80211_CHAN_MAX, NBBY) */
#define IEEE80211_CHAN_ANY 0xffff /* token for ``any channel'' */
#define IEEE80211_CHAN_ANYC \
((struct ieee80211_channel *) IEEE80211_CHAN_ANY)
/* bits 0-3 are for private use by drivers */
/* channel attributes */
#define IEEE80211_CHAN_TURBO 0x0010 /* Turbo channel */
#define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */
#define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */
#define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel. */
#define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */
#define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */
#define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */
#define IEEE80211_CHAN_GFSK 0x0800 /* GFSK channel (FHSS PHY) */
/*
* Useful combinations of channel characteristics.
*/
#define IEEE80211_CHAN_FHSS \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_GFSK)
#define IEEE80211_CHAN_A \
(IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
#define IEEE80211_CHAN_B \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
#define IEEE80211_CHAN_PUREG \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM)
#define IEEE80211_CHAN_G \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
#define IEEE80211_CHAN_T \
(IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO)
#define IEEE80211_CHAN_108G \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO)
#define IEEE80211_IS_CHAN_FHSS(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_FHSS) == IEEE80211_CHAN_FHSS)
#define IEEE80211_IS_CHAN_A(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A)
#define IEEE80211_IS_CHAN_B(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B)
#define IEEE80211_IS_CHAN_PUREG(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG)
#define IEEE80211_IS_CHAN_G(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G)
#define IEEE80211_IS_CHAN_T(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_T) == IEEE80211_CHAN_T)
#define IEEE80211_IS_CHAN_108G(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_108G) == IEEE80211_CHAN_108G)
#define IEEE80211_IS_CHAN_2GHZ(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_2GHZ) != 0)
#define IEEE80211_IS_CHAN_5GHZ(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_5GHZ) != 0)
#define IEEE80211_IS_CHAN_OFDM(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_OFDM) != 0)
#define IEEE80211_IS_CHAN_CCK(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_CCK) != 0)
#define IEEE80211_IS_CHAN_GFSK(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_GFSK) != 0)
/* ni_chan encoding for FH phy */
#define IEEE80211_FH_CHANMOD 80
#define IEEE80211_FH_CHAN(set,pat) (((set)-1)*IEEE80211_FH_CHANMOD+(pat))
#define IEEE80211_FH_CHANSET(chan) ((chan)/IEEE80211_FH_CHANMOD+1)
#define IEEE80211_FH_CHANPAT(chan) ((chan)%IEEE80211_FH_CHANMOD)
/*
* 802.11 rate set.
*/
#define IEEE80211_RATE_SIZE 8 /* 802.11 standard */
#define IEEE80211_RATE_MAXSIZE 15 /* max rates we'll handle */
struct ieee80211_rateset {
u_int8_t rs_nrates;
u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE];
};
#endif /* _NET80211__IEEE80211_H_ */

301
sys/net80211/ieee80211_acl.c Normal file
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/*-
* Copyright (c) 2004-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_acl.c,v 1.3 2004/12/31 22:42:38 sam Exp $");
/*
* IEEE 802.11 MAC ACL support.
*
* When this module is loaded the sender address of each received
* frame is passed to the iac_check method and the module indicates
* if the frame should be accepted or rejected. If the policy is
* set to ACL_POLICY_OPEN then all frames are accepted w/o checking
* the address. Otherwise, the address is looked up in the database
* and if found the frame is either accepted (ACL_POLICY_ALLOW)
* or rejected (ACL_POLICY_DENT).
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net/route.h>
#include <net80211/ieee80211_var.h>
enum {
ACL_POLICY_OPEN = 0, /* open, don't check ACL's */
ACL_POLICY_ALLOW = 1, /* allow traffic from MAC */
ACL_POLICY_DENY = 2, /* deny traffic from MAC */
};
#define ACL_HASHSIZE 32
struct acl {
TAILQ_ENTRY(acl) acl_list;
LIST_ENTRY(acl) acl_hash;
u_int8_t acl_macaddr[IEEE80211_ADDR_LEN];
};
struct aclstate {
acl_lock_t as_lock;
int as_policy;
TAILQ_HEAD(, acl) as_list; /* list of all ACL's */
LIST_HEAD(, acl) as_hash[ACL_HASHSIZE];
struct ieee80211com *as_ic;
};
/* simple hash is enough for variation of macaddr */
#define ACL_HASH(addr) \
(((const u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % ACL_HASHSIZE)
MALLOC_DEFINE(M_80211_ACL, "acl", "802.11 station acl");
static int acl_free_all(struct ieee80211com *);
static int
acl_attach(struct ieee80211com *ic)
{
struct aclstate *as;
MALLOC(as, struct aclstate *, sizeof(struct aclstate),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (as == NULL)
return 0;
ACL_LOCK_INIT(as, "acl");
TAILQ_INIT(&as->as_list);
as->as_policy = ACL_POLICY_OPEN;
as->as_ic = ic;
ic->ic_as = as;
return 1;
}
static void
acl_detach(struct ieee80211com *ic)
{
struct aclstate *as = ic->ic_as;
acl_free_all(ic);
ic->ic_as = NULL;
ACL_LOCK_DESTROY(as);
FREE(as, M_DEVBUF);
}
static __inline struct acl *
_find_acl(struct aclstate *as, const u_int8_t *macaddr)
{
struct acl *acl;
int hash;
hash = ACL_HASH(macaddr);
LIST_FOREACH(acl, &as->as_hash[hash], acl_hash) {
if (IEEE80211_ADDR_EQ(acl->acl_macaddr, macaddr))
return acl;
}
return NULL;
}
static void
_acl_free(struct aclstate *as, struct acl *acl)
{
ACL_LOCK_ASSERT(as);
TAILQ_REMOVE(&as->as_list, acl, acl_list);
LIST_REMOVE(acl, acl_hash);
FREE(acl, M_80211_ACL);
}
static int
acl_check(struct ieee80211com *ic, const u_int8_t mac[IEEE80211_ADDR_LEN])
{
struct aclstate *as = ic->ic_as;
switch (as->as_policy) {
case ACL_POLICY_OPEN:
return 1;
case ACL_POLICY_ALLOW:
return _find_acl(as, mac) != NULL;
case ACL_POLICY_DENY:
return _find_acl(as, mac) == NULL;
}
return 0; /* should not happen */
}
static int
acl_add(struct ieee80211com *ic, const u_int8_t mac[IEEE80211_ADDR_LEN])
{
struct aclstate *as = ic->ic_as;
struct acl *acl, *new;
int hash;
MALLOC(new, struct acl *, sizeof(struct acl), M_80211_ACL, M_NOWAIT | M_ZERO);
if (new == NULL) {
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
"ACL: add %s failed, no memory\n", ether_sprintf(mac));
/* XXX statistic */
return ENOMEM;
}
ACL_LOCK(as);
hash = ACL_HASH(mac);
LIST_FOREACH(acl, &as->as_hash[hash], acl_hash) {
if (IEEE80211_ADDR_EQ(acl->acl_macaddr, mac)) {
ACL_UNLOCK(as);
FREE(new, M_80211_ACL);
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
"ACL: add %s failed, already present\n",
ether_sprintf(mac));
return EEXIST;
}
}
IEEE80211_ADDR_COPY(new->acl_macaddr, mac);
TAILQ_INSERT_TAIL(&as->as_list, new, acl_list);
LIST_INSERT_HEAD(&as->as_hash[hash], new, acl_hash);
ACL_UNLOCK(as);
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
"ACL: add %s\n", ether_sprintf(mac));
return 0;
}
static int
acl_remove(struct ieee80211com *ic, const u_int8_t mac[IEEE80211_ADDR_LEN])
{
struct aclstate *as = ic->ic_as;
struct acl *acl;
ACL_LOCK(as);
acl = _find_acl(as, mac);
if (acl != NULL)
_acl_free(as, acl);
ACL_UNLOCK(as);
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
"ACL: remove %s%s\n", ether_sprintf(mac),
acl == NULL ? ", not present" : "");
return (acl == NULL ? ENOENT : 0);
}
static int
acl_free_all(struct ieee80211com *ic)
{
struct aclstate *as = ic->ic_as;
struct acl *acl;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL, "ACL: %s\n", "free all");
ACL_LOCK(as);
while ((acl = TAILQ_FIRST(&as->as_list)) != NULL)
_acl_free(as, acl);
ACL_UNLOCK(as);
return 0;
}
static int
acl_setpolicy(struct ieee80211com *ic, int policy)
{
struct aclstate *as = ic->ic_as;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ACL,
"ACL: set policy to %u\n", policy);
switch (policy) {
case IEEE80211_MACCMD_POLICY_OPEN:
as->as_policy = ACL_POLICY_OPEN;
break;
case IEEE80211_MACCMD_POLICY_ALLOW:
as->as_policy = ACL_POLICY_ALLOW;
break;
case IEEE80211_MACCMD_POLICY_DENY:
as->as_policy = ACL_POLICY_DENY;
break;
default:
return EINVAL;
}
return 0;
}
static int
acl_getpolicy(struct ieee80211com *ic)
{
struct aclstate *as = ic->ic_as;
return as->as_policy;
}
static const struct ieee80211_aclator mac = {
.iac_name = "mac",
.iac_attach = acl_attach,
.iac_detach = acl_detach,
.iac_check = acl_check,
.iac_add = acl_add,
.iac_remove = acl_remove,
.iac_flush = acl_free_all,
.iac_setpolicy = acl_setpolicy,
.iac_getpolicy = acl_getpolicy,
};
/*
* Module glue.
*/
static int
wlan_acl_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
if (bootverbose)
printf("wlan: <802.11 MAC ACL support>\n");
ieee80211_aclator_register(&mac);
return 0;
case MOD_UNLOAD:
ieee80211_aclator_unregister(&mac);
return 0;
}
return EINVAL;
}
static moduledata_t wlan_acl_mod = {
"wlan_acl",
wlan_acl_modevent,
0
};
DECLARE_MODULE(wlan_acl, wlan_acl_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan_acl, 1);
MODULE_DEPEND(wlan_acl, wlan, 1, 1, 1);

605
sys/net80211/ieee80211_crypto_ccmp.c Normal file
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/*-
* Copyright (c) 2002-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_crypto_ccmp.c,v 1.4 2004/12/31 22:42:38 sam Exp $");
/*
* IEEE 802.11i AES-CCMP crypto support.
*
* Part of this module is derived from similar code in the Host
* AP driver. The code is used with the consent of the author and
* it's license is included below.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.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>
#include <crypto/rijndael/rijndael.h>
#define AES_BLOCK_LEN 16
struct ccmp_ctx {
struct ieee80211com *cc_ic; /* for diagnostics */
rijndael_ctx cc_aes;
};
static void *ccmp_attach(struct ieee80211com *, struct ieee80211_key *);
static void ccmp_detach(struct ieee80211_key *);
static int ccmp_setkey(struct ieee80211_key *);
static int ccmp_encap(struct ieee80211_key *k, struct mbuf *, u_int8_t keyid);
static int ccmp_decap(struct ieee80211_key *, struct mbuf *);
static int ccmp_enmic(struct ieee80211_key *, struct mbuf *);
static int ccmp_demic(struct ieee80211_key *, struct mbuf *);
static const struct ieee80211_cipher ccmp = {
.ic_name = "AES-CCM",
.ic_cipher = IEEE80211_CIPHER_AES_CCM,
.ic_header = IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN +
IEEE80211_WEP_EXTIVLEN,
.ic_trailer = IEEE80211_WEP_MICLEN,
.ic_miclen = 0,
.ic_attach = ccmp_attach,
.ic_detach = ccmp_detach,
.ic_setkey = ccmp_setkey,
.ic_encap = ccmp_encap,
.ic_decap = ccmp_decap,
.ic_enmic = ccmp_enmic,
.ic_demic = ccmp_demic,
};
static int ccmp_encrypt(struct ieee80211_key *, struct mbuf *, int hdrlen);
static int ccmp_decrypt(struct ieee80211_key *, u_int64_t pn,
struct mbuf *, int hdrlen);
static void *
ccmp_attach(struct ieee80211com *ic, struct ieee80211_key *k)
{
struct ccmp_ctx *ctx;
MALLOC(ctx, struct ccmp_ctx *, sizeof(struct ccmp_ctx),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (ctx == NULL) {
ic->ic_stats.is_crypto_nomem++;
return NULL;
}
ctx->cc_ic = ic;
return ctx;
}
static void
ccmp_detach(struct ieee80211_key *k)
{
struct ccmp_ctx *ctx = k->wk_private;
FREE(ctx, M_DEVBUF);
}
static int
ccmp_setkey(struct ieee80211_key *k)
{
struct ccmp_ctx *ctx = k->wk_private;
if (k->wk_keylen != (128/NBBY)) {
IEEE80211_DPRINTF(ctx->cc_ic, IEEE80211_MSG_CRYPTO,
"%s: Invalid key length %u, expecting %u\n",
__func__, k->wk_keylen, 128/NBBY);
return 0;
}
if (k->wk_flags & IEEE80211_KEY_SWCRYPT)
rijndael_set_key(&ctx->cc_aes, k->wk_key, k->wk_keylen*NBBY);
return 1;
}
/*
* Add privacy headers appropriate for the specified key.
*/
static int
ccmp_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
{
struct ccmp_ctx *ctx = k->wk_private;
struct ieee80211com *ic = ctx->cc_ic;
u_int8_t *ivp;
int hdrlen;
hdrlen = ieee80211_hdrspace(ic, mtod(m, void *));
/*
* Copy down 802.11 header and add the IV, KeyID, and ExtIV.
*/
M_PREPEND(m, ccmp.ic_header, M_NOWAIT);
if (m == NULL)
return 0;
ivp = mtod(m, u_int8_t *);
ovbcopy(ivp + ccmp.ic_header, ivp, hdrlen);
ivp += hdrlen;
k->wk_keytsc++; /* XXX wrap at 48 bits */
ivp[0] = k->wk_keytsc >> 0; /* PN0 */
ivp[1] = k->wk_keytsc >> 8; /* PN1 */
ivp[2] = 0; /* Reserved */
ivp[3] = keyid | IEEE80211_WEP_EXTIV; /* KeyID | ExtID */
ivp[4] = k->wk_keytsc >> 16; /* PN2 */
ivp[5] = k->wk_keytsc >> 24; /* PN3 */
ivp[6] = k->wk_keytsc >> 32; /* PN4 */
ivp[7] = k->wk_keytsc >> 40; /* PN5 */
/*
* Finally, do software encrypt if neeed.
*/
if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) &&
!ccmp_encrypt(k, m, hdrlen))
return 0;
return 1;
}
/*
* Add MIC to the frame as needed.
*/
static int
ccmp_enmic(struct ieee80211_key *k, struct mbuf *m)
{
return 1;
}
static __inline uint64_t
READ_6(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5)
{
uint32_t iv32 = (b0 << 0) | (b1 << 8) | (b2 << 16) | (b3 << 24);
uint16_t iv16 = (b4 << 0) | (b5 << 8);
return (((uint64_t)iv16) << 32) | iv32;
}
/*
* Validate and strip privacy headers (and trailer) for a
* received frame. The specified key should be correct but
* is also verified.
*/
static int
ccmp_decap(struct ieee80211_key *k, struct mbuf *m)
{
struct ccmp_ctx *ctx = k->wk_private;
struct ieee80211_frame *wh;
uint8_t *ivp;
uint64_t pn;
int hdrlen;
/*
* Header should have extended IV and sequence number;
* verify the former and validate the latter.
*/
wh = mtod(m, struct ieee80211_frame *);
hdrlen = ieee80211_hdrsize(wh);
ivp = mtod(m, uint8_t *) + hdrlen;
if ((ivp[IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) == 0) {
/*
* No extended IV; discard frame.
*/
IEEE80211_DPRINTF(ctx->cc_ic, IEEE80211_MSG_CRYPTO,
"[%s] Missing ExtIV for AES-CCM cipher\n",
ether_sprintf(wh->i_addr2));
ctx->cc_ic->ic_stats.is_rx_ccmpformat++;
return 0;
}
pn = READ_6(ivp[0], ivp[1], ivp[4], ivp[5], ivp[6], ivp[7]);
if (pn <= k->wk_keyrsc) {
/*
* Replay violation.
*/
ieee80211_notify_replay_failure(ctx->cc_ic, wh, k, pn);
ctx->cc_ic->ic_stats.is_rx_ccmpreplay++;
return 0;
}
/*
* Check if the device handled the decrypt in hardware.
* If so we just strip the header; otherwise we need to
* handle the decrypt in software. Note that for the
* latter we leave the header in place for use in the
* decryption work.
*/
if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) &&
!ccmp_decrypt(k, pn, m, hdrlen))
return 0;
/*
* Copy up 802.11 header and strip crypto bits.
*/
ovbcopy(mtod(m, void *), mtod(m, u_int8_t *) + ccmp.ic_header, hdrlen);
m_adj(m, ccmp.ic_header);
m_adj(m, -ccmp.ic_trailer);
/*
* Ok to update rsc now.
*/
k->wk_keyrsc = pn;
return 1;
}
/*
* Verify and strip MIC from the frame.
*/
static int
ccmp_demic(struct ieee80211_key *k, struct mbuf *m)
{
return 1;
}
static __inline void
xor_block(uint8_t *b, const uint8_t *a, size_t len)
{
int i;
for (i = 0; i < len; i++)
b[i] ^= a[i];
}
/*
* Host AP crypt: host-based CCMP encryption implementation for Host AP driver
*
* Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. See README and COPYING for
* more details.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*/
static void
ccmp_init_blocks(rijndael_ctx *ctx, struct ieee80211_frame *wh,
u_int64_t pn, size_t dlen,
uint8_t b0[AES_BLOCK_LEN], uint8_t aad[2 * AES_BLOCK_LEN],
uint8_t auth[AES_BLOCK_LEN], uint8_t s0[AES_BLOCK_LEN])
{
#define IS_4ADDRESS(wh) \
((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
#define IS_QOS_DATA(wh) IEEE80211_QOS_HAS_SEQ(wh)
/* CCM Initial Block:
* Flag (Include authentication header, M=3 (8-octet MIC),
* L=1 (2-octet Dlen))
* Nonce: 0x00 | A2 | PN
* Dlen */
b0[0] = 0x59;
/* NB: b0[1] set below */
IEEE80211_ADDR_COPY(b0 + 2, wh->i_addr2);
b0[8] = pn >> 40;
b0[9] = pn >> 32;
b0[10] = pn >> 24;
b0[11] = pn >> 16;
b0[12] = pn >> 8;
b0[13] = pn >> 0;
b0[14] = (dlen >> 8) & 0xff;
b0[15] = dlen & 0xff;
/* AAD:
* FC with bits 4..6 and 11..13 masked to zero; 14 is always one
* A1 | A2 | A3
* SC with bits 4..15 (seq#) masked to zero
* A4 (if present)
* QC (if present)
*/
aad[0] = 0; /* AAD length >> 8 */
/* NB: aad[1] set below */
aad[2] = wh->i_fc[0] & 0x8f; /* XXX magic #s */
aad[3] = wh->i_fc[1] & 0xc7; /* XXX magic #s */
/* NB: we know 3 addresses are contiguous */
memcpy(aad + 4, wh->i_addr1, 3 * IEEE80211_ADDR_LEN);
aad[22] = wh->i_seq[0] & IEEE80211_SEQ_FRAG_MASK;
aad[23] = 0; /* all bits masked */
/*
* Construct variable-length portion of AAD based
* on whether this is a 4-address frame/QOS frame.
* We always zero-pad to 32 bytes before running it
* through the cipher.
*
* We also fill in the priority bits of the CCM
* initial block as we know whether or not we have
* a QOS frame.
*/
if (IS_4ADDRESS(wh)) {
IEEE80211_ADDR_COPY(aad + 24,
((struct ieee80211_frame_addr4 *)wh)->i_addr4);
if (IS_QOS_DATA(wh)) {
struct ieee80211_qosframe_addr4 *qwh4 =
(struct ieee80211_qosframe_addr4 *) wh;
aad[30] = qwh4->i_qos[0] & 0x0f;/* just priority bits */
aad[31] = 0;
b0[1] = aad[30];
aad[1] = 22 + IEEE80211_ADDR_LEN + 2;
} else {
*(u_int16_t *)&aad[30] = 0;
b0[1] = 0;
aad[1] = 22 + IEEE80211_ADDR_LEN;
}
} else {
if (IS_QOS_DATA(wh)) {
struct ieee80211_qosframe *qwh =
(struct ieee80211_qosframe*) wh;
aad[24] = qwh->i_qos[0] & 0x0f; /* just priority bits */
aad[25] = 0;
b0[1] = aad[24];
aad[1] = 22 + 2;
} else {
*(u_int16_t *)&aad[24] = 0;
b0[1] = 0;
aad[1] = 22;
}
*(u_int16_t *)&aad[26] = 0;
*(u_int32_t *)&aad[28] = 0;
}
/* Start with the first block and AAD */
rijndael_encrypt(ctx, b0, auth);
xor_block(auth, aad, AES_BLOCK_LEN);
rijndael_encrypt(ctx, auth, auth);
xor_block(auth, &aad[AES_BLOCK_LEN], AES_BLOCK_LEN);
rijndael_encrypt(ctx, auth, auth);
b0[0] &= 0x07;
b0[14] = b0[15] = 0;
rijndael_encrypt(ctx, b0, s0);
#undef IS_QOS_DATA
#undef IS_4ADDRESS
}
#define CCMP_ENCRYPT(_i, _b, _b0, _pos, _e, _len) do { \
/* Authentication */ \
xor_block(_b, _pos, _len); \
rijndael_encrypt(&ctx->cc_aes, _b, _b); \
/* Encryption, with counter */ \
_b0[14] = (_i >> 8) & 0xff; \
_b0[15] = _i & 0xff; \
rijndael_encrypt(&ctx->cc_aes, _b0, _e); \
xor_block(_pos, _e, _len); \
} while (0)
static int
ccmp_encrypt(struct ieee80211_key *key, struct mbuf *m0, int hdrlen)
{
struct ccmp_ctx *ctx = key->wk_private;
struct ieee80211_frame *wh;
struct mbuf *m = m0;
int data_len, i;
uint8_t aad[2 * AES_BLOCK_LEN], b0[AES_BLOCK_LEN], b[AES_BLOCK_LEN],
e[AES_BLOCK_LEN], s0[AES_BLOCK_LEN];
uint8_t *pos;
u_int space;
ctx->cc_ic->ic_stats.is_crypto_ccmp++;
wh = mtod(m, struct ieee80211_frame *);
data_len = m->m_pkthdr.len - (hdrlen + ccmp.ic_header);
ccmp_init_blocks(&ctx->cc_aes, wh, key->wk_keytsc,
data_len, b0, aad, b, s0);
i = 1;
pos = mtod(m, uint8_t *) + hdrlen + ccmp.ic_header;
/* NB: assumes header is entirely in first mbuf */
space = m->m_len - (hdrlen + ccmp.ic_header);
for (;;) {
if (space > data_len)
space = data_len;
/*
* Do full blocks.
*/
while (space >= AES_BLOCK_LEN) {
CCMP_ENCRYPT(i, b, b0, pos, e, AES_BLOCK_LEN);
pos += AES_BLOCK_LEN, space -= AES_BLOCK_LEN;
data_len -= AES_BLOCK_LEN;
i++;
}
if (data_len <= 0) /* no more data */
break;
m = m->m_next;
if (m == NULL) { /* last buffer */
if (space != 0) {
/*
* Short last block.
*/
CCMP_ENCRYPT(i, b, b0, pos, e, space);
}
break;
}
if (space != 0) {
uint8_t *pos_next;
u_int space_next;
u_int len;
/*
* Block straddles buffers, split references. We
* do not handle splits that require >2 buffers.
*/
pos_next = mtod(m, uint8_t *);
len = min(data_len, AES_BLOCK_LEN);
space_next = len > space ? len - space : 0;
KASSERT(m->m_len >= space_next,
("not enough data in following buffer, "
"m_len %u need %u\n", m->m_len, space_next));
xor_block(b+space, pos_next, space_next);
CCMP_ENCRYPT(i, b, b0, pos, e, space);
xor_block(pos_next, e+space, space_next);
data_len -= len;
/* XXX could check for data_len <= 0 */
i++;
pos = pos_next + space_next;
space = m->m_len - space_next;
} else {
/*
* Setup for next buffer.
*/
pos = mtod(m, uint8_t *);
space = m->m_len;
}
}
/* tack on MIC */
xor_block(b, s0, ccmp.ic_trailer);
return m_append(m0, ccmp.ic_trailer, b);
}
#undef CCMP_ENCRYPT
#define CCMP_DECRYPT(_i, _b, _b0, _pos, _a, _len) do { \
/* Decrypt, with counter */ \
_b0[14] = (_i >> 8) & 0xff; \
_b0[15] = _i & 0xff; \
rijndael_encrypt(&ctx->cc_aes, _b0, _b); \
xor_block(_pos, _b, _len); \
/* Authentication */ \
xor_block(_a, _pos, _len); \
rijndael_encrypt(&ctx->cc_aes, _a, _a); \
} while (0)
static int
ccmp_decrypt(struct ieee80211_key *key, u_int64_t pn, struct mbuf *m, int hdrlen)
{
struct ccmp_ctx *ctx = key->wk_private;
struct ieee80211_frame *wh;
uint8_t aad[2 * AES_BLOCK_LEN];
uint8_t b0[AES_BLOCK_LEN], b[AES_BLOCK_LEN], a[AES_BLOCK_LEN];
uint8_t mic[AES_BLOCK_LEN];
size_t data_len;
int i;
uint8_t *pos;
u_int space;
ctx->cc_ic->ic_stats.is_crypto_ccmp++;
wh = mtod(m, struct ieee80211_frame *);
data_len = m->m_pkthdr.len - (hdrlen + ccmp.ic_header + ccmp.ic_trailer);
ccmp_init_blocks(&ctx->cc_aes, wh, pn, data_len, b0, aad, a, b);
m_copydata(m, m->m_pkthdr.len - ccmp.ic_trailer, ccmp.ic_trailer, mic);
xor_block(mic, b, ccmp.ic_trailer);
i = 1;
pos = mtod(m, uint8_t *) + hdrlen + ccmp.ic_header;
space = m->m_len - (hdrlen + ccmp.ic_header);
for (;;) {
if (space > data_len)
space = data_len;
while (space >= AES_BLOCK_LEN) {
CCMP_DECRYPT(i, b, b0, pos, a, AES_BLOCK_LEN);
pos += AES_BLOCK_LEN, space -= AES_BLOCK_LEN;
data_len -= AES_BLOCK_LEN;
i++;
}
if (data_len <= 0) /* no more data */
break;
m = m->m_next;
if (m == NULL) { /* last buffer */
if (space != 0) /* short last block */
CCMP_DECRYPT(i, b, b0, pos, a, space);
break;
}
if (space != 0) {
uint8_t *pos_next;
u_int space_next;
u_int len;
/*
* Block straddles buffers, split references. We
* do not handle splits that require >2 buffers.
*/
pos_next = mtod(m, uint8_t *);
len = min(data_len, AES_BLOCK_LEN);
space_next = len > space ? len - space : 0;
KASSERT(m->m_len >= space_next,
("not enough data in following buffer, "
"m_len %u need %u\n", m->m_len, space_next));
xor_block(b+space, pos_next, space_next);
CCMP_DECRYPT(i, b, b0, pos, a, space);
xor_block(pos_next, b+space, space_next);
data_len -= len;
i++;
pos = pos_next + space_next;
space = m->m_len - space_next;
} else {
/*
* Setup for next buffer.
*/
pos = mtod(m, uint8_t *);
space = m->m_len;
}
}
if (memcmp(mic, a, ccmp.ic_trailer) != 0) {
IEEE80211_DPRINTF(ctx->cc_ic, IEEE80211_MSG_CRYPTO,
"[%s] AES-CCM decrypt failed; MIC mismatch\n",
ether_sprintf(wh->i_addr2));
ctx->cc_ic->ic_stats.is_rx_ccmpmic++;
return 0;
}
return 1;
}
#undef CCMP_DECRYPT
/*
* Module glue.
*/
static int
ccmp_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
ieee80211_crypto_register(&ccmp);
return 0;
case MOD_UNLOAD:
ieee80211_crypto_unregister(&ccmp);
return 0;
}
return EINVAL;
}
static moduledata_t ccmp_mod = {
"wlan_ccmp",
ccmp_modevent,
0
};
DECLARE_MODULE(wlan_ccmp, ccmp_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan_ccmp, 1);
MODULE_DEPEND(wlan_ccmp, wlan, 1, 1, 1);

149
sys/net80211/ieee80211_crypto_none.c Normal file
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/*-
* Copyright (c) 2002-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_crypto_none.c,v 1.3 2004/12/31 22:42:38 sam Exp $");
/*
* IEEE 802.11 NULL crypto support.
*/
#include <sys/param.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 ieee80211com *, struct ieee80211_key *);
static void none_detach(struct ieee80211_key *);
static int none_setkey(struct ieee80211_key *);
static int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t);
static int none_decap(struct ieee80211_key *, struct mbuf *);
static int none_enmic(struct ieee80211_key *, struct mbuf *);
static int none_demic(struct ieee80211_key *, struct mbuf *);
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_encap = none_encap,
.ic_decap = none_decap,
.ic_enmic = none_enmic,
.ic_demic = none_demic,
};
static void *
none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
{
return ic; /* 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 int
none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
{
struct ieee80211com *ic = k->wk_private;
#ifdef IEEE80211_DEBUG
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
#endif
/*
* The specified key is not setup; this can
* happen, at least, when changing keys.
*/
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] key id %u is not set (encap)\n",
ether_sprintf(wh->i_addr1), keyid>>6);
ic->ic_stats.is_tx_badcipher++;
return 0;
}
static int
none_decap(struct ieee80211_key *k, struct mbuf *m)
{
struct ieee80211com *ic = k->wk_private;
#ifdef IEEE80211_DEBUG
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
const u_int8_t *ivp = (const u_int8_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_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] key id %u is not set (decap)\n",
ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6);
ic->ic_stats.is_rx_badkeyid++;
return 0;
}
static int
none_enmic(struct ieee80211_key *k, struct mbuf *m)
{
struct ieee80211com *ic = k->wk_private;
ic->ic_stats.is_tx_badcipher++;
return 0;
}
static int
none_demic(struct ieee80211_key *k, struct mbuf *m)
{
struct ieee80211com *ic = k->wk_private;
ic->ic_stats.is_rx_badkeyid++;
return 0;
}

994
sys/net80211/ieee80211_crypto_tkip.c Normal file
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/*-
* Copyright (c) 2002-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_crypto_tkip.c,v 1.7 2004/12/31 22:42:38 sam Exp $");
/*
* IEEE 802.11i TKIP crypto support.
*
* Part of this module is derived from similar code in the Host
* AP driver. The code is used with the consent of the author and
* it's license is included below.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/endian.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 *tkip_attach(struct ieee80211com *, struct ieee80211_key *);
static void tkip_detach(struct ieee80211_key *);
static int tkip_setkey(struct ieee80211_key *);
static int tkip_encap(struct ieee80211_key *, struct mbuf *m, u_int8_t keyid);
static int tkip_enmic(struct ieee80211_key *, struct mbuf *);
static int tkip_decap(struct ieee80211_key *, struct mbuf *);
static int tkip_demic(struct ieee80211_key *, struct mbuf *);
static const struct ieee80211_cipher tkip = {
.ic_name = "TKIP",
.ic_cipher = IEEE80211_CIPHER_TKIP,
.ic_header = IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN +
IEEE80211_WEP_EXTIVLEN,
.ic_trailer = IEEE80211_WEP_CRCLEN,
.ic_miclen = IEEE80211_WEP_MICLEN,
.ic_attach = tkip_attach,
.ic_detach = tkip_detach,
.ic_setkey = tkip_setkey,
.ic_encap = tkip_encap,
.ic_decap = tkip_decap,
.ic_enmic = tkip_enmic,
.ic_demic = tkip_demic,
};
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t __u32;
typedef uint32_t u32;
#define memmove(dst, src, n) ovbcopy(src, dst, n)
struct tkip_ctx {
struct ieee80211com *tc_ic; /* for diagnostics */
u16 tx_ttak[5];
int tx_phase1_done;
u8 tx_rc4key[16]; /* XXX for test module; make locals? */
u16 rx_ttak[5];
int rx_phase1_done;
u8 rx_rc4key[16]; /* XXX for test module; make locals? */
uint64_t rx_rsc; /* held until MIC verified */
};
static void michael_mic(struct tkip_ctx *, const u8 *key,
struct mbuf *m, u_int off, size_t data_len,
u8 mic[IEEE80211_WEP_MICLEN]);
static int tkip_encrypt(struct tkip_ctx *, struct ieee80211_key *,
struct mbuf *, int hdr_len);
static int tkip_decrypt(struct tkip_ctx *, struct ieee80211_key *,
struct mbuf *, int hdr_len);
static void *
tkip_attach(struct ieee80211com *ic, struct ieee80211_key *k)
{
struct tkip_ctx *ctx;
MALLOC(ctx, struct tkip_ctx *, sizeof(struct tkip_ctx),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (ctx == NULL) {
ic->ic_stats.is_crypto_nomem++;
return NULL;
}
ctx->tc_ic = ic;
return ctx;
}
static void
tkip_detach(struct ieee80211_key *k)
{
struct tkip_ctx *ctx = k->wk_private;
FREE(ctx, M_DEVBUF);
}
static int
tkip_setkey(struct ieee80211_key *k)
{
struct tkip_ctx *ctx = k->wk_private;
if (k->wk_keylen != (128/NBBY)) {
(void) ctx; /* XXX */
IEEE80211_DPRINTF(ctx->tc_ic, IEEE80211_MSG_CRYPTO,
"%s: Invalid key length %u, expecting %u\n",
__func__, k->wk_keylen, 128/NBBY);
return 0;
}
k->wk_keytsc = 1; /* TSC starts at 1 */
return 1;
}
/*
* Add privacy headers and do any s/w encryption required.
*/
static int
tkip_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
{
struct tkip_ctx *ctx = k->wk_private;
struct ieee80211com *ic = ctx->tc_ic;
u_int8_t *ivp;
int hdrlen;
/*
* Handle TKIP counter measures requirement.
*/
if (ic->ic_flags & IEEE80211_F_COUNTERM) {
#ifdef IEEE80211_DEBUG
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
#endif
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] Discard frame due to countermeasures (%s)\n",
ether_sprintf(wh->i_addr2), __func__);
ic->ic_stats.is_crypto_tkipcm++;
return 0;
}
hdrlen = ieee80211_hdrspace(ic, mtod(m, void *));
/*
* Copy down 802.11 header and add the IV, KeyID, and ExtIV.
*/
M_PREPEND(m, tkip.ic_header, M_NOWAIT);
if (m == NULL)
return 0;
ivp = mtod(m, u_int8_t *);
memmove(ivp, ivp + tkip.ic_header, hdrlen);
ivp += hdrlen;
ivp[0] = k->wk_keytsc >> 8; /* TSC1 */
ivp[1] = (ivp[0] | 0x20) & 0x7f; /* WEP seed */
ivp[2] = k->wk_keytsc >> 0; /* TSC0 */
ivp[3] = keyid | IEEE80211_WEP_EXTIV; /* KeyID | ExtID */
ivp[4] = k->wk_keytsc >> 16; /* TSC2 */
ivp[5] = k->wk_keytsc >> 24; /* TSC3 */
ivp[6] = k->wk_keytsc >> 32; /* TSC4 */
ivp[7] = k->wk_keytsc >> 40; /* TSC5 */
/*
* Finally, do software encrypt if neeed.
*/
if (k->wk_flags & IEEE80211_KEY_SWCRYPT) {
if (!tkip_encrypt(ctx, k, m, hdrlen))
return 0;
/* NB: tkip_encrypt handles wk_keytsc */
} else
k->wk_keytsc++;
return 1;
}
/*
* Add MIC to the frame as needed.
*/
static int
tkip_enmic(struct ieee80211_key *k, struct mbuf *m)
{
struct tkip_ctx *ctx = k->wk_private;
if (k->wk_flags & IEEE80211_KEY_SWMIC) {
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
struct ieee80211com *ic = ctx->tc_ic;
int hdrlen;
uint8_t mic[IEEE80211_WEP_MICLEN];
ic->ic_stats.is_crypto_tkipenmic++;
hdrlen = ieee80211_hdrspace(ic, wh);
michael_mic(ctx, k->wk_txmic,
m, hdrlen, m->m_pkthdr.len - hdrlen, mic);
return m_append(m, tkip.ic_miclen, mic);
}
return 1;
}
static __inline uint64_t
READ_6(uint8_t b0, uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5)
{
uint32_t iv32 = (b0 << 0) | (b1 << 8) | (b2 << 16) | (b3 << 24);
uint16_t iv16 = (b4 << 0) | (b5 << 8);
return (((uint64_t)iv16) << 32) | iv32;
}
/*
* Validate and strip privacy headers (and trailer) for a
* received frame. If necessary, decrypt the frame using
* the specified key.
*/
static int
tkip_decap(struct ieee80211_key *k, struct mbuf *m)
{
struct tkip_ctx *ctx = k->wk_private;
struct ieee80211com *ic = ctx->tc_ic;
struct ieee80211_frame *wh;
uint8_t *ivp;
int hdrlen;
/*
* Header should have extended IV and sequence number;
* verify the former and validate the latter.
*/
wh = mtod(m, struct ieee80211_frame *);
hdrlen = ieee80211_hdrsize(wh);
ivp = mtod(m, uint8_t *) + hdrlen;
if ((ivp[IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) == 0) {
/*
* No extended IV; discard frame.
*/
IEEE80211_DPRINTF(ctx->tc_ic, IEEE80211_MSG_CRYPTO,
"[%s] missing ExtIV for TKIP cipher\n",
ether_sprintf(wh->i_addr2));
ctx->tc_ic->ic_stats.is_rx_tkipformat++;
return 0;
}
/*
* Handle TKIP counter measures requirement.
*/
if (ic->ic_flags & IEEE80211_F_COUNTERM) {
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] discard frame due to countermeasures (%s)\n",
ether_sprintf(wh->i_addr2), __func__);
ic->ic_stats.is_crypto_tkipcm++;
return 0;
}
ctx->rx_rsc = READ_6(ivp[2], ivp[0], ivp[4], ivp[5], ivp[6], ivp[7]);
if (ctx->rx_rsc <= k->wk_keyrsc) {
/*
* Replay violation; notify upper layer.
*/
ieee80211_notify_replay_failure(ctx->tc_ic, wh, k, ctx->rx_rsc);
ctx->tc_ic->ic_stats.is_rx_tkipreplay++;
return 0;
}
/*
* NB: We can't update the rsc in the key until MIC is verified.
*
* We assume we are not preempted between doing the check above
* and updating wk_keyrsc when stripping the MIC in tkip_demic.
* Otherwise we might process another packet and discard it as
* a replay.
*/
/*
* Check if the device handled the decrypt in hardware.
* If so we just strip the header; otherwise we need to
* handle the decrypt in software.
*/
if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) &&
!tkip_decrypt(ctx, k, m, hdrlen))
return 0;
/*
* Copy up 802.11 header and strip crypto bits.
*/
memmove(mtod(m, uint8_t *) + tkip.ic_header, mtod(m, void *), hdrlen);
m_adj(m, tkip.ic_header);
m_adj(m, -tkip.ic_trailer);
return 1;
}
/*
* Verify and strip MIC from the frame.
*/
static int
tkip_demic(struct ieee80211_key *k, struct mbuf *m)
{
struct tkip_ctx *ctx = k->wk_private;
if (k->wk_flags & IEEE80211_KEY_SWMIC) {
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
int hdrlen = ieee80211_hdrsize(wh);
u8 mic[IEEE80211_WEP_MICLEN];
u8 mic0[IEEE80211_WEP_MICLEN];
ctx->tc_ic->ic_stats.is_crypto_tkipdemic++;
michael_mic(ctx, k->wk_rxmic,
m, hdrlen, m->m_pkthdr.len - (hdrlen + tkip.ic_miclen),
mic);
m_copydata(m, m->m_pkthdr.len - tkip.ic_miclen,
tkip.ic_miclen, mic0);
if (memcmp(mic, mic0, tkip.ic_miclen)) {
/* NB: 802.11 layer handles statistic and debug msg */
ieee80211_notify_michael_failure(ctx->tc_ic, wh,
k->wk_keyix);
return 0;
}
}
/*
* Strip MIC from the tail.
*/
m_adj(m, -tkip.ic_miclen);
/*
* Ok to update rsc now that MIC has been verified.
*/
k->wk_keyrsc = ctx->rx_rsc;
return 1;
}
/*
* Host AP crypt: host-based TKIP encryption implementation for Host AP driver
*
* Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. See README and COPYING for
* more details.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*/
static const __u32 crc32_table[256] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
0x2d02ef8dL
};
static __inline u16 RotR1(u16 val)
{
return (val >> 1) | (val << 15);
}
static __inline u8 Lo8(u16 val)
{
return val & 0xff;
}
static __inline u8 Hi8(u16 val)
{
return val >> 8;
}
static __inline u16 Lo16(u32 val)
{
return val & 0xffff;
}
static __inline u16 Hi16(u32 val)
{
return val >> 16;
}
static __inline u16 Mk16(u8 hi, u8 lo)
{
return lo | (((u16) hi) << 8);
}
static __inline u16 Mk16_le(const u16 *v)
{
return le16toh(*v);
}
static const u16 Sbox[256] = {
0xC6A5, 0xF884, 0xEE99, 0xF68D, 0xFF0D, 0xD6BD, 0xDEB1, 0x9154,
0x6050, 0x0203, 0xCEA9, 0x567D, 0xE719, 0xB562, 0x4DE6, 0xEC9A,
0x8F45, 0x1F9D, 0x8940, 0xFA87, 0xEF15, 0xB2EB, 0x8EC9, 0xFB0B,
0x41EC, 0xB367, 0x5FFD, 0x45EA, 0x23BF, 0x53F7, 0xE496, 0x9B5B,
0x75C2, 0xE11C, 0x3DAE, 0x4C6A, 0x6C5A, 0x7E41, 0xF502, 0x834F,
0x685C, 0x51F4, 0xD134, 0xF908, 0xE293, 0xAB73, 0x6253, 0x2A3F,
0x080C, 0x9552, 0x4665, 0x9D5E, 0x3028, 0x37A1, 0x0A0F, 0x2FB5,
0x0E09, 0x2436, 0x1B9B, 0xDF3D, 0xCD26, 0x4E69, 0x7FCD, 0xEA9F,
0x121B, 0x1D9E, 0x5874, 0x342E, 0x362D, 0xDCB2, 0xB4EE, 0x5BFB,
0xA4F6, 0x764D, 0xB761, 0x7DCE, 0x527B, 0xDD3E, 0x5E71, 0x1397,
0xA6F5, 0xB968, 0x0000, 0xC12C, 0x4060, 0xE31F, 0x79C8, 0xB6ED,
0xD4BE, 0x8D46, 0x67D9, 0x724B, 0x94DE, 0x98D4, 0xB0E8, 0x854A,
0xBB6B, 0xC52A, 0x4FE5, 0xED16, 0x86C5, 0x9AD7, 0x6655, 0x1194,
0x8ACF, 0xE910, 0x0406, 0xFE81, 0xA0F0, 0x7844, 0x25BA, 0x4BE3,
0xA2F3, 0x5DFE, 0x80C0, 0x058A, 0x3FAD, 0x21BC, 0x7048, 0xF104,
0x63DF, 0x77C1, 0xAF75, 0x4263, 0x2030, 0xE51A, 0xFD0E, 0xBF6D,
0x814C, 0x1814, 0x2635, 0xC32F, 0xBEE1, 0x35A2, 0x88CC, 0x2E39,
0x9357, 0x55F2, 0xFC82, 0x7A47, 0xC8AC, 0xBAE7, 0x322B, 0xE695,
0xC0A0, 0x1998, 0x9ED1, 0xA37F, 0x4466, 0x547E, 0x3BAB, 0x0B83,
0x8CCA, 0xC729, 0x6BD3, 0x283C, 0xA779, 0xBCE2, 0x161D, 0xAD76,
0xDB3B, 0x6456, 0x744E, 0x141E, 0x92DB, 0x0C0A, 0x486C, 0xB8E4,
0x9F5D, 0xBD6E, 0x43EF, 0xC4A6, 0x39A8, 0x31A4, 0xD337, 0xF28B,
0xD532, 0x8B43, 0x6E59, 0xDAB7, 0x018C, 0xB164, 0x9CD2, 0x49E0,
0xD8B4, 0xACFA, 0xF307, 0xCF25, 0xCAAF, 0xF48E, 0x47E9, 0x1018,
0x6FD5, 0xF088, 0x4A6F, 0x5C72, 0x3824, 0x57F1, 0x73C7, 0x9751,
0xCB23, 0xA17C, 0xE89C, 0x3E21, 0x96DD, 0x61DC, 0x0D86, 0x0F85,
0xE090, 0x7C42, 0x71C4, 0xCCAA, 0x90D8, 0x0605, 0xF701, 0x1C12,
0xC2A3, 0x6A5F, 0xAEF9, 0x69D0, 0x1791, 0x9958, 0x3A27, 0x27B9,
0xD938, 0xEB13, 0x2BB3, 0x2233, 0xD2BB, 0xA970, 0x0789, 0x33A7,
0x2DB6, 0x3C22, 0x1592, 0xC920, 0x8749, 0xAAFF, 0x5078, 0xA57A,
0x038F, 0x59F8, 0x0980, 0x1A17, 0x65DA, 0xD731, 0x84C6, 0xD0B8,
0x82C3, 0x29B0, 0x5A77, 0x1E11, 0x7BCB, 0xA8FC, 0x6DD6, 0x2C3A,
};
static __inline u16 _S_(u16 v)
{
u16 t = Sbox[Hi8(v)];
return Sbox[Lo8(v)] ^ ((t << 8) | (t >> 8));
}
#define PHASE1_LOOP_COUNT 8
static void tkip_mixing_phase1(u16 *TTAK, const u8 *TK, const u8 *TA, u32 IV32)
{
int i, j;
/* Initialize the 80-bit TTAK from TSC (IV32) and TA[0..5] */
TTAK[0] = Lo16(IV32);
TTAK[1] = Hi16(IV32);
TTAK[2] = Mk16(TA[1], TA[0]);
TTAK[3] = Mk16(TA[3], TA[2]);
TTAK[4] = Mk16(TA[5], TA[4]);
for (i = 0; i < PHASE1_LOOP_COUNT; i++) {
j = 2 * (i & 1);
TTAK[0] += _S_(TTAK[4] ^ Mk16(TK[1 + j], TK[0 + j]));
TTAK[1] += _S_(TTAK[0] ^ Mk16(TK[5 + j], TK[4 + j]));
TTAK[2] += _S_(TTAK[1] ^ Mk16(TK[9 + j], TK[8 + j]));
TTAK[3] += _S_(TTAK[2] ^ Mk16(TK[13 + j], TK[12 + j]));
TTAK[4] += _S_(TTAK[3] ^ Mk16(TK[1 + j], TK[0 + j])) + i;
}
}
#ifndef _BYTE_ORDER
#error "Don't know native byte order"
#endif
static void tkip_mixing_phase2(u8 *WEPSeed, const u8 *TK, const u16 *TTAK,
u16 IV16)
{
/* Make temporary area overlap WEP seed so that the final copy can be
* avoided on little endian hosts. */
u16 *PPK = (u16 *) &WEPSeed[4];
/* Step 1 - make copy of TTAK and bring in TSC */
PPK[0] = TTAK[0];
PPK[1] = TTAK[1];
PPK[2] = TTAK[2];
PPK[3] = TTAK[3];
PPK[4] = TTAK[4];
PPK[5] = TTAK[4] + IV16;
/* Step 2 - 96-bit bijective mixing using S-box */
PPK[0] += _S_(PPK[5] ^ Mk16_le((const u16 *) &TK[0]));
PPK[1] += _S_(PPK[0] ^ Mk16_le((const u16 *) &TK[2]));
PPK[2] += _S_(PPK[1] ^ Mk16_le((const u16 *) &TK[4]));
PPK[3] += _S_(PPK[2] ^ Mk16_le((const u16 *) &TK[6]));
PPK[4] += _S_(PPK[3] ^ Mk16_le((const u16 *) &TK[8]));
PPK[5] += _S_(PPK[4] ^ Mk16_le((const u16 *) &TK[10]));
PPK[0] += RotR1(PPK[5] ^ Mk16_le((const u16 *) &TK[12]));
PPK[1] += RotR1(PPK[0] ^ Mk16_le((const u16 *) &TK[14]));
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
PPK[5] += RotR1(PPK[4]);
/* Step 3 - bring in last of TK bits, assign 24-bit WEP IV value
* WEPSeed[0..2] is transmitted as WEP IV */
WEPSeed[0] = Hi8(IV16);
WEPSeed[1] = (Hi8(IV16) | 0x20) & 0x7F;
WEPSeed[2] = Lo8(IV16);
WEPSeed[3] = Lo8((PPK[5] ^ Mk16_le((const u16 *) &TK[0])) >> 1);
#if _BYTE_ORDER == _BIG_ENDIAN
{
int i;
for (i = 0; i < 6; i++)
PPK[i] = (PPK[i] << 8) | (PPK[i] >> 8);
}
#endif
}
static void
wep_encrypt(u8 *key, struct mbuf *m0, u_int off, size_t data_len,
uint8_t icv[IEEE80211_WEP_CRCLEN])
{
u32 i, j, k, crc;
size_t buflen;
u8 S[256];
u8 *pos;
struct mbuf *m;
#define S_SWAP(a,b) do { u8 t = S[a]; S[a] = S[b]; S[b] = t; } while(0)
/* Setup RC4 state */
for (i = 0; i < 256; i++)
S[i] = i;
j = 0;
for (i = 0; i < 256; i++) {
j = (j + S[i] + key[i & 0x0f]) & 0xff;
S_SWAP(i, j);
}
/* Compute CRC32 over unencrypted data and apply RC4 to data */
crc = ~0;
i = j = 0;
m = m0;
pos = mtod(m, uint8_t *) + off;
buflen = m->m_len - off;
for (;;) {
if (buflen > data_len)
buflen = data_len;
data_len -= buflen;
for (k = 0; k < buflen; k++) {
crc = crc32_table[(crc ^ *pos) & 0xff] ^ (crc >> 8);
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
*pos++ ^= S[(S[i] + S[j]) & 0xff];
}
m = m->m_next;
if (m == NULL) {
KASSERT(data_len == 0,
("out of buffers with data_len %zu\n", data_len));
break;
}
pos = mtod(m, uint8_t *);
buflen = m->m_len;
}
crc = ~crc;
/* Append little-endian CRC32 and encrypt it to produce ICV */
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
for (k = 0; k < IEEE80211_WEP_CRCLEN; k++) {
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
icv[k] ^= S[(S[i] + S[j]) & 0xff];
}
}
static int
wep_decrypt(u8 *key, struct mbuf *m, u_int off, size_t data_len)
{
u32 i, j, k, crc;
u8 S[256];
u8 *pos, icv[4];
size_t buflen;
/* Setup RC4 state */
for (i = 0; i < 256; i++)
S[i] = i;
j = 0;
for (i = 0; i < 256; i++) {
j = (j + S[i] + key[i & 0x0f]) & 0xff;
S_SWAP(i, j);
}
/* Apply RC4 to data and compute CRC32 over decrypted data */
crc = ~0;
i = j = 0;
pos = mtod(m, uint8_t *) + off;
buflen = m->m_len - off;
for (;;) {
if (buflen > data_len)
buflen = data_len;
data_len -= buflen;
for (k = 0; k < buflen; k++) {
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
*pos ^= S[(S[i] + S[j]) & 0xff];
crc = crc32_table[(crc ^ *pos) & 0xff] ^ (crc >> 8);
pos++;
}
m = m->m_next;
if (m == NULL) {
KASSERT(data_len == 0,
("out of buffers with data_len %zu\n", data_len));
break;
}
pos = mtod(m, uint8_t *);
buflen = m->m_len;
}
crc = ~crc;
/* Encrypt little-endian CRC32 and verify that it matches with the
* received ICV */
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
for (k = 0; k < 4; k++) {
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
if ((icv[k] ^ S[(S[i] + S[j]) & 0xff]) != *pos++) {
/* ICV mismatch - drop frame */
return -1;
}
}
return 0;
}
static __inline u32 rotl(u32 val, int bits)
{
return (val << bits) | (val >> (32 - bits));
}
static __inline u32 rotr(u32 val, int bits)
{
return (val >> bits) | (val << (32 - bits));
}
static __inline u32 xswap(u32 val)
{
return ((val & 0x00ff00ff) << 8) | ((val & 0xff00ff00) >> 8);
}
#define michael_block(l, r) \
do { \
r ^= rotl(l, 17); \
l += r; \
r ^= xswap(l); \
l += r; \
r ^= rotl(l, 3); \
l += r; \
r ^= rotr(l, 2); \
l += r; \
} while (0)
static __inline u32 get_le32_split(u8 b0, u8 b1, u8 b2, u8 b3)
{
return b0 | (b1 << 8) | (b2 << 16) | (b3 << 24);
}
static __inline u32 get_le32(const u8 *p)
{
return get_le32_split(p[0], p[1], p[2], p[3]);
}
static __inline void put_le32(u8 *p, u32 v)
{
p[0] = v;
p[1] = v >> 8;
p[2] = v >> 16;
p[3] = v >> 24;
}
/*
* Craft pseudo header used to calculate the MIC.
*/
static void
michael_mic_hdr(const struct ieee80211_frame *wh0, uint8_t hdr[16])
{
const struct ieee80211_frame_addr4 *wh =
(const struct ieee80211_frame_addr4 *) wh0;
switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
case IEEE80211_FC1_DIR_NODS:
IEEE80211_ADDR_COPY(hdr, wh->i_addr1); /* DA */
IEEE80211_ADDR_COPY(hdr + IEEE80211_ADDR_LEN, wh->i_addr2);
break;
case IEEE80211_FC1_DIR_TODS:
IEEE80211_ADDR_COPY(hdr, wh->i_addr3); /* DA */
IEEE80211_ADDR_COPY(hdr + IEEE80211_ADDR_LEN, wh->i_addr2);
break;
case IEEE80211_FC1_DIR_FROMDS:
IEEE80211_ADDR_COPY(hdr, wh->i_addr1); /* DA */
IEEE80211_ADDR_COPY(hdr + IEEE80211_ADDR_LEN, wh->i_addr3);
break;
case IEEE80211_FC1_DIR_DSTODS:
IEEE80211_ADDR_COPY(hdr, wh->i_addr3); /* DA */
IEEE80211_ADDR_COPY(hdr + IEEE80211_ADDR_LEN, wh->i_addr4);
break;
}
if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) {
const struct ieee80211_qosframe *qwh =
(const struct ieee80211_qosframe *) wh;
hdr[12] = qwh->i_qos[0] & IEEE80211_QOS_TID;
} else
hdr[12] = 0;
hdr[13] = hdr[14] = hdr[15] = 0; /* reserved */
}
static void
michael_mic(struct tkip_ctx *ctx, const u8 *key,
struct mbuf *m, u_int off, size_t data_len,
u8 mic[IEEE80211_WEP_MICLEN])
{
uint8_t hdr[16];
u32 l, r;
const uint8_t *data;
u_int space;
michael_mic_hdr(mtod(m, struct ieee80211_frame *), hdr);
l = get_le32(key);
r = get_le32(key + 4);
/* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */
l ^= get_le32(hdr);
michael_block(l, r);
l ^= get_le32(&hdr[4]);
michael_block(l, r);
l ^= get_le32(&hdr[8]);
michael_block(l, r);
l ^= get_le32(&hdr[12]);
michael_block(l, r);
/* first buffer has special handling */
data = mtod(m, const uint8_t *) + off;
space = m->m_len - off;
for (;;) {
if (space > data_len)
space = data_len;
/* collect 32-bit blocks from current buffer */
while (space >= sizeof(uint32_t)) {
l ^= get_le32(data);
michael_block(l, r);
data += sizeof(uint32_t), space -= sizeof(uint32_t);
data_len -= sizeof(uint32_t);
}
if (data_len < sizeof(uint32_t))
break;
m = m->m_next;
if (m == NULL) {
KASSERT(0, ("out of data, data_len %zu\n", data_len));
break;
}
if (space != 0) {
const uint8_t *data_next;
/*
* Block straddles buffers, split references.
*/
data_next = mtod(m, const uint8_t *);
KASSERT(m->m_len >= sizeof(uint32_t) - space,
("not enough data in following buffer, "
"m_len %u need %zu\n", m->m_len,
sizeof(uint32_t) - space));
switch (space) {
case 1:
l ^= get_le32_split(data[0], data_next[0],
data_next[1], data_next[2]);
data = data_next + 3;
space = m->m_len - 3;
break;
case 2:
l ^= get_le32_split(data[0], data[1],
data_next[0], data_next[1]);
data = data_next + 2;
space = m->m_len - 2;
break;
case 3:
l ^= get_le32_split(data[0], data[1],
data[2], data_next[0]);
data = data_next + 1;
space = m->m_len - 1;
break;
}
michael_block(l, r);
data_len -= sizeof(uint32_t);
} else {
/*
* Setup for next buffer.
*/
data = mtod(m, const uint8_t *);
space = m->m_len;
}
}
/* Last block and padding (0x5a, 4..7 x 0) */
switch (data_len) {
case 0:
l ^= get_le32_split(0x5a, 0, 0, 0);
break;
case 1:
l ^= get_le32_split(data[0], 0x5a, 0, 0);
break;
case 2:
l ^= get_le32_split(data[0], data[1], 0x5a, 0);
break;
case 3:
l ^= get_le32_split(data[0], data[1], data[2], 0x5a);
break;
}
michael_block(l, r);
/* l ^= 0; */
michael_block(l, r);
put_le32(mic, l);
put_le32(mic + 4, r);
}
static int
tkip_encrypt(struct tkip_ctx *ctx, struct ieee80211_key *key,
struct mbuf *m, int hdrlen)
{
struct ieee80211_frame *wh;
uint8_t icv[IEEE80211_WEP_CRCLEN];
ctx->tc_ic->ic_stats.is_crypto_tkip++;
wh = mtod(m, struct ieee80211_frame *);
if (!ctx->tx_phase1_done) {
tkip_mixing_phase1(ctx->tx_ttak, key->wk_key, wh->i_addr2,
(u32)(key->wk_keytsc >> 16));
ctx->tx_phase1_done = 1;
}
tkip_mixing_phase2(ctx->tx_rc4key, key->wk_key, ctx->tx_ttak,
(u16) key->wk_keytsc);
wep_encrypt(ctx->tx_rc4key,
m, hdrlen + tkip.ic_header,
m->m_pkthdr.len - (hdrlen + tkip.ic_header),
icv);
(void) m_append(m, IEEE80211_WEP_CRCLEN, icv); /* XXX check return */
key->wk_keytsc++;
if ((u16)(key->wk_keytsc) == 0)
ctx->tx_phase1_done = 0;
return 1;
}
static int
tkip_decrypt(struct tkip_ctx *ctx, struct ieee80211_key *key,
struct mbuf *m, int hdrlen)
{
struct ieee80211_frame *wh;
u32 iv32;
u16 iv16;
ctx->tc_ic->ic_stats.is_crypto_tkip++;
wh = mtod(m, struct ieee80211_frame *);
/* NB: tkip_decap already verified header and left seq in rx_rsc */
iv16 = (u16) ctx->rx_rsc;
iv32 = (u32) (ctx->rx_rsc >> 16);
if (iv32 != (u32)(key->wk_keyrsc >> 16) || !ctx->rx_phase1_done) {
tkip_mixing_phase1(ctx->rx_ttak, key->wk_key,
wh->i_addr2, iv32);
ctx->rx_phase1_done = 1;
}
tkip_mixing_phase2(ctx->rx_rc4key, key->wk_key, ctx->rx_ttak, iv16);
/* NB: m is unstripped; deduct headers + ICV to get payload */
if (wep_decrypt(ctx->rx_rc4key,
m, hdrlen + tkip.ic_header,
m->m_pkthdr.len - (hdrlen + tkip.ic_header + tkip.ic_trailer))) {
if (iv32 != (u32)(key->wk_keyrsc >> 16)) {
/* Previously cached Phase1 result was already lost, so
* it needs to be recalculated for the next packet. */
ctx->rx_phase1_done = 0;
}
IEEE80211_DPRINTF(ctx->tc_ic, IEEE80211_MSG_CRYPTO,
"[%s] TKIP ICV mismatch on decrypt\n",
ether_sprintf(wh->i_addr2));
ctx->tc_ic->ic_stats.is_rx_tkipicv++;
return 0;
}
return 1;
}
/*
* Module glue.
*/
static int
tkip_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
ieee80211_crypto_register(&tkip);
return 0;
case MOD_UNLOAD:
ieee80211_crypto_unregister(&tkip);
return 0;
}
return EINVAL;
}
static moduledata_t tkip_mod = {
"wlan_tkip",
tkip_modevent,
0
};
DECLARE_MODULE(wlan_tkip, tkip_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan_tkip, 1);
MODULE_DEPEND(wlan_tkip, wlan, 1, 1, 1);

499
sys/net80211/ieee80211_crypto_wep.c Normal file
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@ -0,0 +1,499 @@
/*-
* Copyright (c) 2002-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_crypto_wep.c,v 1.5 2004/12/31 22:42:38 sam Exp $");
/*
* IEEE 802.11 WEP crypto support.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/endian.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 *wep_attach(struct ieee80211com *, struct ieee80211_key *);
static void wep_detach(struct ieee80211_key *);
static int wep_setkey(struct ieee80211_key *);
static int wep_encap(struct ieee80211_key *, struct mbuf *, u_int8_t keyid);
static int wep_decap(struct ieee80211_key *, struct mbuf *);
static int wep_enmic(struct ieee80211_key *, struct mbuf *);
static int wep_demic(struct ieee80211_key *, struct mbuf *);
static const struct ieee80211_cipher wep = {
.ic_name = "WEP",
.ic_cipher = IEEE80211_CIPHER_WEP,
.ic_header = IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN,
.ic_trailer = IEEE80211_WEP_CRCLEN,
.ic_miclen = 0,
.ic_attach = wep_attach,
.ic_detach = wep_detach,
.ic_setkey = wep_setkey,
.ic_encap = wep_encap,
.ic_decap = wep_decap,
.ic_enmic = wep_enmic,
.ic_demic = wep_demic,
};
static int wep_encrypt(struct ieee80211_key *, struct mbuf *, int hdrlen);
static int wep_decrypt(struct ieee80211_key *, struct mbuf *, int hdrlen);
struct wep_ctx {
struct ieee80211com *wc_ic; /* for diagnostics */
u_int32_t wc_iv; /* initial vector for crypto */
};
static void *
wep_attach(struct ieee80211com *ic, struct ieee80211_key *k)
{
struct wep_ctx *ctx;
MALLOC(ctx, struct wep_ctx *, sizeof(struct wep_ctx),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (ctx == NULL) {
ic->ic_stats.is_crypto_nomem++;
return NULL;
}
ctx->wc_ic = ic;
get_random_bytes(&ctx->wc_iv, sizeof(ctx->wc_iv));
return ctx;
}
static void
wep_detach(struct ieee80211_key *k)
{
struct wep_ctx *ctx = k->wk_private;
FREE(ctx, M_DEVBUF);
}
static int
wep_setkey(struct ieee80211_key *k)
{
return k->wk_keylen >= 40/NBBY;
}
/*
* Add privacy headers appropriate for the specified key.
*/
static int
wep_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid)
{
struct wep_ctx *ctx = k->wk_private;
struct ieee80211com *ic = ctx->wc_ic;
u_int32_t iv;
u_int8_t *ivp;
int hdrlen;
hdrlen = ieee80211_hdrspace(ic, mtod(m, void *));
/*
* Copy down 802.11 header and add the IV + KeyID.
*/
M_PREPEND(m, wep.ic_header, M_NOWAIT);
if (m == NULL)
return 0;
ivp = mtod(m, u_int8_t *);
ovbcopy(ivp + wep.ic_header, ivp, hdrlen);
ivp += hdrlen;
/*
* XXX
* IV must not duplicate during the lifetime of the key.
* But no mechanism to renew keys is defined in IEEE 802.11
* for WEP. And the IV may be duplicated at other stations
* because the session key itself is shared. So we use a
* pseudo random IV for now, though it is not the right way.
*
* NB: Rather than use a strictly random IV we select a
* random one to start and then increment the value for
* each frame. This is an explicit tradeoff between
* overhead and security. Given the basic insecurity of
* WEP this seems worthwhile.
*/
/*
* Skip 'bad' IVs from Fluhrer/Mantin/Shamir:
* (B, 255, N) with 3 <= B < 16 and 0 <= N <= 255
*/
iv = ctx->wc_iv;
if ((iv & 0xff00) == 0xff00) {
int B = (iv & 0xff0000) >> 16;
if (3 <= B && B < 16)
iv += 0x0100;
}
ctx->wc_iv = iv + 1;
/*
* NB: Preserve byte order of IV for packet
* sniffers; it doesn't matter otherwise.
*/
#if _BYTE_ORDER == _BIG_ENDIAN
ivp[0] = iv >> 0;
ivp[1] = iv >> 8;
ivp[2] = iv >> 16;
#else
ivp[2] = iv >> 0;
ivp[1] = iv >> 8;
ivp[0] = iv >> 16;
#endif
ivp[3] = keyid;
/*
* Finally, do software encrypt if neeed.
*/
if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) &&
!wep_encrypt(k, m, hdrlen))
return 0;
return 1;
}
/*
* Add MIC to the frame as needed.
*/
static int
wep_enmic(struct ieee80211_key *k, struct mbuf *m)
{
return 1;
}
/*
* Validate and strip privacy headers (and trailer) for a
* received frame. If necessary, decrypt the frame using
* the specified key.
*/
static int
wep_decap(struct ieee80211_key *k, struct mbuf *m)
{
struct wep_ctx *ctx = k->wk_private;
struct ieee80211_frame *wh;
int hdrlen;
wh = mtod(m, struct ieee80211_frame *);
hdrlen = ieee80211_hdrsize(wh);
/*
* Check if the device handled the decrypt in hardware.
* If so we just strip the header; otherwise we need to
* handle the decrypt in software.
*/
if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) &&
!wep_decrypt(k, m, hdrlen)) {
IEEE80211_DPRINTF(ctx->wc_ic, IEEE80211_MSG_CRYPTO,
"[%s] WEP ICV mismatch on decrypt\n",
ether_sprintf(wh->i_addr2));
ctx->wc_ic->ic_stats.is_rx_wepfail++;
return 0;
}
/*
* Copy up 802.11 header and strip crypto bits.
*/
ovbcopy(mtod(m, void *), mtod(m, u_int8_t *) + wep.ic_header, hdrlen);
m_adj(m, wep.ic_header);
m_adj(m, -wep.ic_trailer);
return 1;
}
/*
* Verify and strip MIC from the frame.
*/
static int
wep_demic(struct ieee80211_key *k, struct mbuf *skb)
{
return 1;
}
static const uint32_t crc32_table[256] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
0x2d02ef8dL
};
static int
wep_encrypt(struct ieee80211_key *key, struct mbuf *m0, int hdrlen)
{
#define S_SWAP(a,b) do { uint8_t t = S[a]; S[a] = S[b]; S[b] = t; } while(0)
struct wep_ctx *ctx = key->wk_private;
struct mbuf *m = m0;
u_int8_t rc4key[IEEE80211_WEP_IVLEN + IEEE80211_KEYBUF_SIZE];
uint8_t icv[IEEE80211_WEP_CRCLEN];
uint32_t i, j, k, crc;
size_t buflen, data_len;
uint8_t S[256];
uint8_t *pos;
u_int off, keylen;
ctx->wc_ic->ic_stats.is_crypto_wep++;
/* NB: this assumes the header was pulled up */
memcpy(rc4key, mtod(m, u_int8_t *) + hdrlen, IEEE80211_WEP_IVLEN);
memcpy(rc4key + IEEE80211_WEP_IVLEN, key->wk_key, key->wk_keylen);
/* Setup RC4 state */
for (i = 0; i < 256; i++)
S[i] = i;
j = 0;
keylen = key->wk_keylen + IEEE80211_WEP_IVLEN;
for (i = 0; i < 256; i++) {
j = (j + S[i] + rc4key[i % keylen]) & 0xff;
S_SWAP(i, j);
}
off = hdrlen + wep.ic_header;
data_len = m->m_pkthdr.len - off;
/* Compute CRC32 over unencrypted data and apply RC4 to data */
crc = ~0;
i = j = 0;
pos = mtod(m, uint8_t *) + off;
buflen = m->m_len - off;
for (;;) {
if (buflen > data_len)
buflen = data_len;
data_len -= buflen;
for (k = 0; k < buflen; k++) {
crc = crc32_table[(crc ^ *pos) & 0xff] ^ (crc >> 8);
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
*pos++ ^= S[(S[i] + S[j]) & 0xff];
}
if (m->m_next == NULL) {
if (data_len != 0) { /* out of data */
IEEE80211_DPRINTF(ctx->wc_ic,
IEEE80211_MSG_CRYPTO,
"[%s] out of data for WEP (data_len %zu)\n",
ether_sprintf(mtod(m0,
struct ieee80211_frame *)->i_addr2),
data_len);
return 0;
}
break;
}
m = m->m_next;
pos = mtod(m, uint8_t *);
buflen = m->m_len;
}
crc = ~crc;
/* Append little-endian CRC32 and encrypt it to produce ICV */
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
for (k = 0; k < IEEE80211_WEP_CRCLEN; k++) {
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
icv[k] ^= S[(S[i] + S[j]) & 0xff];
}
return m_append(m0, IEEE80211_WEP_CRCLEN, icv);
#undef S_SWAP
}
static int
wep_decrypt(struct ieee80211_key *key, struct mbuf *m0, int hdrlen)
{
#define S_SWAP(a,b) do { uint8_t t = S[a]; S[a] = S[b]; S[b] = t; } while(0)
struct wep_ctx *ctx = key->wk_private;
struct mbuf *m = m0;
u_int8_t rc4key[IEEE80211_WEP_IVLEN + IEEE80211_KEYBUF_SIZE];
uint8_t icv[IEEE80211_WEP_CRCLEN];
uint32_t i, j, k, crc;
size_t buflen, data_len;
uint8_t S[256];
uint8_t *pos;
u_int off, keylen;
ctx->wc_ic->ic_stats.is_crypto_wep++;
/* NB: this assumes the header was pulled up */
memcpy(rc4key, mtod(m, u_int8_t *) + hdrlen, IEEE80211_WEP_IVLEN);
memcpy(rc4key + IEEE80211_WEP_IVLEN, key->wk_key, key->wk_keylen);
/* Setup RC4 state */
for (i = 0; i < 256; i++)
S[i] = i;
j = 0;
keylen = key->wk_keylen + IEEE80211_WEP_IVLEN;
for (i = 0; i < 256; i++) {
j = (j + S[i] + rc4key[i % keylen]) & 0xff;
S_SWAP(i, j);
}
off = hdrlen + wep.ic_header;
data_len = m->m_pkthdr.len - (off + wep.ic_trailer),
/* Compute CRC32 over unencrypted data and apply RC4 to data */
crc = ~0;
i = j = 0;
pos = mtod(m, uint8_t *) + off;
buflen = m->m_len - off;
for (;;) {
if (buflen > data_len)
buflen = data_len;
data_len -= buflen;
for (k = 0; k < buflen; k++) {
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
*pos ^= S[(S[i] + S[j]) & 0xff];
crc = crc32_table[(crc ^ *pos) & 0xff] ^ (crc >> 8);
pos++;
}
m = m->m_next;
if (m == NULL) {
if (data_len != 0) { /* out of data */
IEEE80211_DPRINTF(ctx->wc_ic,
IEEE80211_MSG_CRYPTO,
"[%s] out of data for WEP (data_len %zu)\n",
ether_sprintf(mtod(m0,
struct ieee80211_frame *)->i_addr2),
data_len);
return 0;
}
break;
}
pos = mtod(m, uint8_t *);
buflen = m->m_len;
}
crc = ~crc;
/* Encrypt little-endian CRC32 and verify that it matches with
* received ICV */
icv[0] = crc;
icv[1] = crc >> 8;
icv[2] = crc >> 16;
icv[3] = crc >> 24;
for (k = 0; k < IEEE80211_WEP_CRCLEN; k++) {
i = (i + 1) & 0xff;
j = (j + S[i]) & 0xff;
S_SWAP(i, j);
/* XXX assumes ICV is contiguous in mbuf */
if ((icv[k] ^ S[(S[i] + S[j]) & 0xff]) != *pos++) {
/* ICV mismatch - drop frame */
return 0;
}
}
return 1;
#undef S_SWAP
}
/*
* Module glue.
*/
static int
wep_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
ieee80211_crypto_register(&wep);
return 0;
case MOD_UNLOAD:
ieee80211_crypto_unregister(&wep);
return 0;
}
return EINVAL;
}
static moduledata_t wep_mod = {
"wlan_wep",
wep_modevent,
0
};
DECLARE_MODULE(wlan_wep, wep_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan_wep, 1);
MODULE_DEPEND(wlan_wep, wlan, 1, 1, 1);

345
sys/net80211/ieee80211_netbsd.c Normal file
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@ -0,0 +1,345 @@
/*-
* Copyright (c) 2003-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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: src/sys/net80211/ieee80211_freebsd.c,v 1.7 2005/03/29 19:36:42 sam Exp $");
/*
* IEEE 802.11 support (FreeBSD-specific code)
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/linker.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net/route.h>
#include <net80211/ieee80211_var.h>
SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
#ifdef IEEE80211_DEBUG
int ieee80211_debug = 0;
SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
0, "debugging printfs");
#endif
static int
ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
{
int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
int error;
error = sysctl_handle_int(oidp, &inact, 0, req);
if (error || !req->newptr)
return error;
*(int *)arg1 = inact / IEEE80211_INACT_WAIT;
return 0;
}
static int
ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
{
struct ieee80211com *ic = arg1;
const char *name = ic->ic_ifp->if_xname;
return SYSCTL_OUT(req, name, strlen(name));
}
void
ieee80211_sysctl_attach(struct ieee80211com *ic)
{
struct sysctl_ctx_list *ctx;
struct sysctl_oid *oid;
char num[14]; /* sufficient for 32 bits */
MALLOC(ctx, struct sysctl_ctx_list *, sizeof(struct sysctl_ctx_list),
M_DEVBUF, M_NOWAIT | M_ZERO);
if (ctx == NULL) {
if_printf(ic->ic_ifp, "%s: cannot allocate sysctl context!\n",
__func__);
return;
}
sysctl_ctx_init(ctx);
snprintf(num, sizeof(num), "%u", ic->ic_vap);
oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
OID_AUTO, num, CTLFLAG_RD, NULL, "");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"%parent", CTLFLAG_RD, ic, 0, ieee80211_sysctl_parent, "A",
"parent device");
#ifdef IEEE80211_DEBUG
ic->ic_debug = ieee80211_debug;
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"debug", CTLFLAG_RW, &ic->ic_debug, 0,
"control debugging printfs");
#endif
/* XXX inherit from tunables */
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"inact_run", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_run, 0,
ieee80211_sysctl_inact, "I",
"station inactivity timeout (sec)");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"inact_probe", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_probe, 0,
ieee80211_sysctl_inact, "I",
"station inactivity probe timeout (sec)");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"inact_auth", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_auth, 0,
ieee80211_sysctl_inact, "I",
"station authentication timeout (sec)");
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"inact_init", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_init, 0,
ieee80211_sysctl_inact, "I",
"station initial state timeout (sec)");
SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
"driver_caps", CTLFLAG_RW, &ic->ic_caps, 0,
"driver capabilities");
ic->ic_sysctl = ctx;
}
void
ieee80211_sysctl_detach(struct ieee80211com *ic)
{
if (ic->ic_sysctl != NULL) {
sysctl_ctx_free(ic->ic_sysctl);
ic->ic_sysctl = NULL;
}
}
int
ieee80211_node_dectestref(struct ieee80211_node *ni)
{
/* XXX need equivalent of atomic_dec_and_test */
atomic_subtract_int(&ni->ni_refcnt, 1);
return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
}
/*
* Allocate and setup a management frame of the specified
* size. We return the mbuf and a pointer to the start
* of the contiguous data area that's been reserved based
* on the packet length. The data area is forced to 32-bit
* alignment and the buffer length to a multiple of 4 bytes.
* This is done mainly so beacon frames (that require this)
* can use this interface too.
*/
struct mbuf *
ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen)
{
struct mbuf *m;
u_int len;
/*
* NB: we know the mbuf routines will align the data area
* so we don't need to do anything special.
*/
/* XXX 4-address frame? */
len = roundup(sizeof(struct ieee80211_frame) + pktlen, 4);
KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
if (len < MINCLSIZE) {
m = m_gethdr(M_NOWAIT, MT_HEADER);
/*
* Align the data in case additional headers are added.
* This should only happen when a WEP header is added
* which only happens for shared key authentication mgt
* frames which all fit in MHLEN.
*/
if (m != NULL)
MH_ALIGN(m, len);
} else
m = m_getcl(M_NOWAIT, MT_HEADER, M_PKTHDR);
if (m != NULL) {
m->m_data += sizeof(struct ieee80211_frame);
*frm = m->m_data;
}
return m;
}
#include <sys/libkern.h>
void
get_random_bytes(void *p, size_t n)
{
u_int8_t *dp = p;
while (n > 0) {
u_int32_t v = arc4random();
size_t nb = n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n;
bcopy(&v, dp, n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n);
dp += sizeof(u_int32_t), n -= nb;
}
}
void
ieee80211_notify_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int newassoc)
{
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211_join_event iev;
memset(&iev, 0, sizeof(iev));
if (ni == ic->ic_bss) {
IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_bssid);
rt_ieee80211msg(ifp, newassoc ?
RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC,
&iev, sizeof(iev));
if_link_state_change(ifp, LINK_STATE_UP);
} else {
IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
rt_ieee80211msg(ifp, newassoc ?
RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN,
&iev, sizeof(iev));
}
}
void
ieee80211_notify_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
{
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211_leave_event iev;
if (ni == ic->ic_bss) {
rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
if_link_state_change(ifp, LINK_STATE_DOWN);
} else {
/* fire off wireless event station leaving */
memset(&iev, 0, sizeof(iev));
IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
rt_ieee80211msg(ifp, RTM_IEEE80211_LEAVE, &iev, sizeof(iev));
}
}
void
ieee80211_notify_scan_done(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
"%s: notify scan done\n", ic->ic_ifp->if_xname);
/* dispatch wireless event indicating scan completed */
rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
}
void
ieee80211_notify_replay_failure(struct ieee80211com *ic,
const struct ieee80211_frame *wh, const struct ieee80211_key *k,
u_int64_t rsc)
{
struct ifnet *ifp = ic->ic_ifp;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] %s replay detected <rsc %ju, csc %ju, keyix %u>\n",
ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name,
(intmax_t) rsc, (intmax_t) k->wk_keyrsc, k->wk_keyix);
if (ifp != NULL) { /* NB: for cipher test modules */
struct ieee80211_replay_event iev;
IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
iev.iev_cipher = k->wk_cipher->ic_cipher;
iev.iev_keyix = k->wk_keyix;
iev.iev_keyrsc = k->wk_keyrsc;
iev.iev_rsc = rsc;
rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
}
}
void
ieee80211_notify_michael_failure(struct ieee80211com *ic,
const struct ieee80211_frame *wh, u_int keyix)
{
struct ifnet *ifp = ic->ic_ifp;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
"[%s] michael MIC verification failed <keyix %u>\n",
ether_sprintf(wh->i_addr2), keyix);
ic->ic_stats.is_rx_tkipmic++;
if (ifp != NULL) { /* NB: for cipher test modules */
struct ieee80211_michael_event iev;
IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
iev.iev_cipher = IEEE80211_CIPHER_TKIP;
iev.iev_keyix = keyix;
rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
}
}
void
ieee80211_load_module(const char *modname)
{
#ifdef notyet
struct thread *td = curthread;
if (suser(td) == 0 && securelevel_gt(td->td_ucred, 0) == 0) {
mtx_lock(&Giant);
(void) linker_load_module(modname, NULL, NULL, NULL, NULL);
mtx_unlock(&Giant);
}
#else
printf("%s: load the %s module by hand for now.\n", __func__, modname);
#endif
}
/*
* Module glue.
*
* NB: the module name is "wlan" for compatibility with NetBSD.
*/
static int
wlan_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
if (bootverbose)
printf("wlan: <802.11 Link Layer>\n");
return 0;
case MOD_UNLOAD:
return 0;
}
return EINVAL;
}
static moduledata_t wlan_mod = {
"wlan",
wlan_modevent,
0
};
DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan, 1);
MODULE_DEPEND(wlan, ether, 1, 1, 1);

241
sys/net80211/ieee80211_netbsd.h
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@ -1,19 +1,224 @@
#ifdef __FreeBSD__
/*-
* Copyright (c) 2003-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_freebsd.h,v 1.4 2005/04/04 04:27:20 sam Exp $
*/
#ifndef _NET80211_IEEE80211_FREEBSD_H_
#define _NET80211_IEEE80211_FREEBSD_H_
/*
* Beacon locking definitions.
*/
typedef struct mtx ieee80211_beacon_lock_t;
#define IEEE80211_BEACON_LOCK_INIT(_ic, _name) \
mtx_init(&(_ic)->ic_beaconlock, _name, "802.11 beacon lock", MTX_DEF)
#define IEEE80211_BEACON_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_beaconlock)
#define IEEE80211_BEACON_LOCK(_ic) mtx_lock(&(_ic)->ic_beaconlock)
#define IEEE80211_BEACON_UNLOCK(_ic) mtx_unlock(&(_ic)->ic_beaconlock)
#define IEEE80211_BEACON_LOCK_ASSERT(_ic) \
mtx_assert(&(_ic)->ic_beaconlock, MA_OWNED)
/*
* Node locking definitions.
*/
typedef struct mtx ieee80211_node_lock_t;
#define IEEE80211_NODE_LOCK_INIT(_ic, _name) \
mtx_init(&(_ic)->ic_nodelock, _name, "802.11 node table", MTX_DEF)
#define IEEE80211_NODE_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_nodelock)
#define IEEE80211_NODE_LOCK(_ic) mtx_lock(&(_ic)->ic_nodelock)
#define IEEE80211_NODE_UNLOCK(_ic) mtx_unlock(&(_ic)->ic_nodelock)
#define IEEE80211_NODE_LOCK_ASSERT(_ic) \
mtx_assert(&(_ic)->ic_nodelock, MA_OWNED)
#else
typedef int ieee80211_node_lock_t;
#define IEEE80211_NODE_LOCK_INIT(_ic, _name)
#define IEEE80211_NODE_LOCK_DESTROY(_ic)
#define IEEE80211_NODE_LOCK(_ic) (_ic)->ic_nodelock = splnet()
#define IEEE80211_NODE_UNLOCK(_ic) splx((_ic)->ic_nodelock)
#define IEEE80211_NODE_LOCK_ASSERT(_ic)
#endif
#define IEEE80211_NODE_LOCK_BH IEEE80211_NODE_LOCK
#define IEEE80211_NODE_UNLOCK_BH IEEE80211_NODE_UNLOCK
#define IEEE80211_NODE_LOCK_INIT(_nt, _name) \
mtx_init(&(_nt)->nt_nodelock, _name, "802.11 node table", MTX_DEF)
#define IEEE80211_NODE_LOCK_DESTROY(_nt) mtx_destroy(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_LOCK(_nt) mtx_lock(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_UNLOCK(_nt) mtx_unlock(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_LOCK_ASSERT(_nt) \
mtx_assert(&(_nt)->nt_nodelock, MA_OWNED)
/*
* Node table scangen locking definitions.
*/
typedef struct mtx ieee80211_scan_lock_t;
#define IEEE80211_SCAN_LOCK_INIT(_nt, _name) \
mtx_init(&(_nt)->nt_scanlock, _name, "802.11 scangen", MTX_DEF)
#define IEEE80211_SCAN_LOCK_DESTROY(_nt) mtx_destroy(&(_nt)->nt_scanlock)
#define IEEE80211_SCAN_LOCK(_nt) mtx_lock(&(_nt)->nt_scanlock)
#define IEEE80211_SCAN_UNLOCK(_nt) mtx_unlock(&(_nt)->nt_scanlock)
#define IEEE80211_SCAN_LOCK_ASSERT(_nt) \
mtx_assert(&(_nt)->nt_scanlock, MA_OWNED)
/*
* Per-node power-save queue definitions.
*/
#define IEEE80211_NODE_SAVEQ_INIT(_ni, _name) do { \
mtx_init(&(_ni)->ni_savedq.ifq_mtx, _name, "802.11 ps queue", MTX_DEF);\
(_ni)->ni_savedq.ifq_maxlen = IEEE80211_PS_MAX_QUEUE; \
} while (0)
#define IEEE80211_NODE_SAVEQ_DESTROY(_ni) \
mtx_destroy(&(_ni)->ni_savedq.ifq_mtx)
#define IEEE80211_NODE_SAVEQ_QLEN(_ni) \
_IF_QLEN(&(_ni)->ni_savedq)
#define IEEE80211_NODE_SAVEQ_LOCK(_ni) do { \
IF_LOCK(&(_ni)->ni_savedq); \
} while (0)
#define IEEE80211_NODE_SAVEQ_UNLOCK(_ni) do { \
IF_UNLOCK(&(_ni)->ni_savedq); \
} while (0)
#define IEEE80211_NODE_SAVEQ_DEQUEUE(_ni, _m, _qlen) do { \
IEEE80211_NODE_SAVEQ_LOCK(_ni); \
_IF_DEQUEUE(&(_ni)->ni_savedq, _m); \
(_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \
IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \
} while (0)
#define IEEE80211_NODE_SAVEQ_DRAIN(_ni, _qlen) do { \
IEEE80211_NODE_SAVEQ_LOCK(_ni); \
(_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \
_IF_DRAIN(&(_ni)->ni_savedq); \
IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \
} while (0)
/* XXX could be optimized */
#define _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(_ni, _m) do { \
_IF_DEQUEUE(&(_ni)->ni_savedq, m); \
} while (0)
#define _IEEE80211_NODE_SAVEQ_ENQUEUE(_ni, _m, _qlen, _age) do {\
(_m)->m_nextpkt = NULL; \
if ((_ni)->ni_savedq.ifq_tail != NULL) { \
_age -= M_AGE_GET((_ni)->ni_savedq.ifq_tail); \
(_ni)->ni_savedq.ifq_tail->m_nextpkt = (_m); \
} else { \
(_ni)->ni_savedq.ifq_head = (_m); \
} \
M_AGE_SET(_m, _age); \
(_ni)->ni_savedq.ifq_tail = (_m); \
(_qlen) = ++(_ni)->ni_savedq.ifq_len; \
} while (0)
/*
* 802.1x MAC ACL database locking definitions.
*/
typedef struct mtx acl_lock_t;
#define ACL_LOCK_INIT(_as, _name) \
mtx_init(&(_as)->as_lock, _name, "802.11 ACL", MTX_DEF)
#define ACL_LOCK_DESTROY(_as) mtx_destroy(&(_as)->as_lock)
#define ACL_LOCK(_as) mtx_lock(&(_as)->as_lock)
#define ACL_UNLOCK(_as) mtx_unlock(&(_as)->as_lock)
#define ACL_LOCK_ASSERT(_as) \
mtx_assert((&(_as)->as_lock), MA_OWNED)
/*
* Node reference counting definitions.
*
* ieee80211_node_initref initialize the reference count to 1
* ieee80211_node_incref add a reference
* ieee80211_node_decref remove a reference
* ieee80211_node_dectestref remove a reference and return 1 if this
* is the last reference, otherwise 0
* ieee80211_node_refcnt reference count for printing (only)
*/
#include <machine/atomic.h>
#define ieee80211_node_initref(_ni) \
do { ((_ni)->ni_refcnt = 1); } while (0)
#define ieee80211_node_incref(_ni) \
atomic_add_int(&(_ni)->ni_refcnt, 1)
#define ieee80211_node_decref(_ni) \
atomic_subtract_int(&(_ni)->ni_refcnt, 1)
struct ieee80211_node;
int ieee80211_node_dectestref(struct ieee80211_node *ni);
#define ieee80211_node_refcnt(_ni) (_ni)->ni_refcnt
struct mbuf *ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen);
#define M_LINK0 M_PROTO1 /* WEP requested */
#define M_PWR_SAV M_PROTO4 /* bypass PS handling */
/*
* Encode WME access control bits in the PROTO flags.
* This is safe since it's passed directly in to the
* driver and there's no chance someone else will clobber
* them on us.
*/
#define M_WME_AC_MASK (M_PROTO2|M_PROTO3)
/* XXX 5 is wrong if M_PROTO* are redefined */
#define M_WME_AC_SHIFT 5
#define M_WME_SETAC(m, ac) \
((m)->m_flags = ((m)->m_flags &~ M_WME_AC_MASK) | \
((ac) << M_WME_AC_SHIFT))
#define M_WME_GETAC(m) (((m)->m_flags >> M_WME_AC_SHIFT) & 0x3)
/*
* Mbufs on the power save queue are tagged with an age and
* timed out. We reuse the hardware checksum field in the
* mbuf packet header to store this data.
*/
#define M_AGE_SET(m,v) (m->m_pkthdr.csum_data = v)
#define M_AGE_GET(m) (m->m_pkthdr.csum_data)
#define M_AGE_SUB(m,adj) (m->m_pkthdr.csum_data -= adj)
void get_random_bytes(void *, size_t);
struct ieee80211com;
void ieee80211_sysctl_attach(struct ieee80211com *);
void ieee80211_sysctl_detach(struct ieee80211com *);
void ieee80211_load_module(const char *);
/* XXX this stuff belongs elsewhere */
/*
* Message formats for messages from the net80211 layer to user
* applications via the routing socket. These messages are appended
* to an if_announcemsghdr structure.
*/
struct ieee80211_join_event {
uint8_t iev_addr[6];
};
struct ieee80211_leave_event {
uint8_t iev_addr[6];
};
struct ieee80211_replay_event {
uint8_t iev_src[6]; /* src MAC */
uint8_t iev_dst[6]; /* dst MAC */
uint8_t iev_cipher; /* cipher type */
uint8_t iev_keyix; /* key id/index */
uint64_t iev_keyrsc; /* RSC from key */
uint64_t iev_rsc; /* RSC from frame */
};
struct ieee80211_michael_event {
uint8_t iev_src[6]; /* src MAC */
uint8_t iev_dst[6]; /* dst MAC */
uint8_t iev_cipher; /* cipher type */
uint8_t iev_keyix; /* key id/index */
};
#define RTM_IEEE80211_ASSOC 100 /* station associate (bss mode) */
#define RTM_IEEE80211_REASSOC 101 /* station re-associate (bss mode) */
#define RTM_IEEE80211_DISASSOC 102 /* station disassociate (bss mode) */
#define RTM_IEEE80211_JOIN 103 /* station join (ap mode) */
#define RTM_IEEE80211_LEAVE 104 /* station leave (ap mode) */
#define RTM_IEEE80211_SCAN 105 /* scan complete, results available */
#define RTM_IEEE80211_REPLAY 106 /* sequence counter replay detected */
#define RTM_IEEE80211_MICHAEL 107 /* Michael MIC failure detected */
#define RTM_IEEE80211_REJOIN 108 /* station re-associate (ap mode) */
#endif /* _NET80211_IEEE80211_FREEBSD_H_ */

101
sys/net80211/ieee80211_xauth.c Normal file
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@ -0,0 +1,101 @@
/*-
* Copyright (c) 2004 Video54 Technologies, Inc.
* Copyright (c) 2004-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_xauth.c,v 1.2 2004/12/31 22:42:38 sam Exp $");
/*
* External authenticator placeholder module.
*
* This support is optional; it is only used when the 802.11 layer's
* authentication mode is set to use 802.1x or WPA is enabled separately
* (for WPA-PSK). If compiled as a module this code does not need
* to be present unless 802.1x/WPA is in use.
*
* The authenticator hooks into the 802.11 layer. At present we use none
* of the available callbacks--the user mode authenticator process works
* entirely from messages about stations joining and leaving.
*/
#include <sys/param.h>
#include <sys/kernel.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 <net/route.h>
#include <net80211/ieee80211_var.h>
/*
* One module handles everything for now. May want
* to split things up for embedded applications.
*/
static const struct ieee80211_authenticator xauth = {
.ia_name = "external",
.ia_attach = NULL,
.ia_detach = NULL,
.ia_node_join = NULL,
.ia_node_leave = NULL,
};
/*
* Module glue.
*/
static int
wlan_xauth_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
ieee80211_authenticator_register(IEEE80211_AUTH_8021X, &xauth);
ieee80211_authenticator_register(IEEE80211_AUTH_WPA, &xauth);
return 0;
case MOD_UNLOAD:
ieee80211_authenticator_unregister(IEEE80211_AUTH_8021X);
ieee80211_authenticator_unregister(IEEE80211_AUTH_WPA);
return 0;
}
return EINVAL;
}
static moduledata_t wlan_xauth_mod = {
"wlan_xauth",
wlan_xauth_modevent,
0
};
DECLARE_MODULE(wlan_xauth, wlan_xauth_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan_xauth, 1);
MODULE_DEPEND(wlan_xauth, wlan, 1, 1, 1);