From 3cdc4fcd5f1c566008c86aae0cebf1d2a4d0b670 Mon Sep 17 00:00:00 2001 From: dyoung Date: Tue, 21 Jun 2005 20:37:38 +0000 Subject: [PATCH] Import FreeBSD's net80211(9) of 2005-05-18 --- sys/net80211/_ieee80211.h | 188 +++++ sys/net80211/ieee80211_acl.c | 301 ++++++++ sys/net80211/ieee80211_crypto_ccmp.c | 605 ++++++++++++++++ sys/net80211/ieee80211_crypto_none.c | 149 ++++ sys/net80211/ieee80211_crypto_tkip.c | 994 +++++++++++++++++++++++++++ sys/net80211/ieee80211_crypto_wep.c | 499 ++++++++++++++ sys/net80211/ieee80211_netbsd.c | 345 ++++++++++ sys/net80211/ieee80211_netbsd.h | 241 ++++++- sys/net80211/ieee80211_xauth.c | 101 +++ 9 files changed, 3405 insertions(+), 18 deletions(-) create mode 100644 sys/net80211/_ieee80211.h create mode 100644 sys/net80211/ieee80211_acl.c create mode 100644 sys/net80211/ieee80211_crypto_ccmp.c create mode 100644 sys/net80211/ieee80211_crypto_none.c create mode 100644 sys/net80211/ieee80211_crypto_tkip.c create mode 100644 sys/net80211/ieee80211_crypto_wep.c create mode 100644 sys/net80211/ieee80211_netbsd.c create mode 100644 sys/net80211/ieee80211_xauth.c diff --git a/sys/net80211/_ieee80211.h b/sys/net80211/_ieee80211.h new file mode 100644 index 000000000000..1f53c2dfe69d --- /dev/null +++ b/sys/net80211/_ieee80211.h @@ -0,0 +1,188 @@ +/*- + * 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_ */ diff --git a/sys/net80211/ieee80211_acl.c b/sys/net80211/ieee80211_acl.c new file mode 100644 index 000000000000..45bd0fe58a4d --- /dev/null +++ b/sys/net80211/ieee80211_acl.c @@ -0,0 +1,301 @@ +/*- + * 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 +__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 +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include + +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); diff --git a/sys/net80211/ieee80211_crypto_ccmp.c b/sys/net80211/ieee80211_crypto_ccmp.c new file mode 100644 index 000000000000..f631c2ffb99d --- /dev/null +++ b/sys/net80211/ieee80211_crypto_ccmp.c @@ -0,0 +1,605 @@ +/*- + * 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 +__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 +#include +#include +#include +#include +#include + +#include + +#include +#include +#include + +#include + +#include + +#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 + * + * 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); diff --git a/sys/net80211/ieee80211_crypto_none.c b/sys/net80211/ieee80211_crypto_none.c new file mode 100644 index 000000000000..cda87578e0b8 --- /dev/null +++ b/sys/net80211/ieee80211_crypto_none.c @@ -0,0 +1,149 @@ +/*- + * 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 +__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 +#include +#include +#include + +#include + +#include +#include +#include + +#include + +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; +} diff --git a/sys/net80211/ieee80211_crypto_tkip.c b/sys/net80211/ieee80211_crypto_tkip.c new file mode 100644 index 000000000000..afe9eaacad2d --- /dev/null +++ b/sys/net80211/ieee80211_crypto_tkip.c @@ -0,0 +1,994 @@ +/*- + * 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 +__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 +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include + +#include + +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 + * + * 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); diff --git a/sys/net80211/ieee80211_crypto_wep.c b/sys/net80211/ieee80211_crypto_wep.c new file mode 100644 index 000000000000..fda78c892af0 --- /dev/null +++ b/sys/net80211/ieee80211_crypto_wep.c @@ -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 +__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 +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include + +#include + +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); diff --git a/sys/net80211/ieee80211_netbsd.c b/sys/net80211/ieee80211_netbsd.c new file mode 100644 index 000000000000..754de2faa3bf --- /dev/null +++ b/sys/net80211/ieee80211_netbsd.c @@ -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 +__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 +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include + +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 + +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 \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 \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); diff --git a/sys/net80211/ieee80211_netbsd.h b/sys/net80211/ieee80211_netbsd.h index b26b00f634ca..9ba36e1a0971 100644 --- a/sys/net80211/ieee80211_netbsd.h +++ b/sys/net80211/ieee80211_netbsd.h @@ -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 + +#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_ */ diff --git a/sys/net80211/ieee80211_xauth.c b/sys/net80211/ieee80211_xauth.c new file mode 100644 index 000000000000..20c81d6fb46b --- /dev/null +++ b/sys/net80211/ieee80211_xauth.c @@ -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 +__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 +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include + +/* + * 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);