| /*- |
| * 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. |
| * |
| * $Id: ieee80211_crypto_tkip.c 2028 2007-01-30 03:51:52Z proski $ |
| */ |
| |
| /* |
| * 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. |
| */ |
| #ifndef AUTOCONF_INCLUDED |
| #include <linux/config.h> |
| #endif |
| #include <linux/version.h> |
| #include <linux/module.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/init.h> |
| |
| #include "net80211/if_media.h" |
| |
| #include "net80211/ieee80211_var.h" |
| |
| static void *tkip_attach(struct ieee80211vap *, 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 sk_buff *, u_int8_t); |
| static int tkip_enmic(struct ieee80211_key *, struct sk_buff *, int); |
| static int tkip_decap(struct ieee80211_key *, struct sk_buff *, int); |
| static int tkip_demic(struct ieee80211_key *, struct sk_buff *, int); |
| |
| 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, |
| }; |
| |
| struct tkip_ctx { |
| struct ieee80211vap *tc_vap; /* for diagnostics + statistics */ |
| struct ieee80211com *tc_ic; |
| |
| 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 *, |
| struct sk_buff *, u_int, size_t, |
| u8 mic[IEEE80211_WEP_MICLEN]); |
| static int tkip_encrypt(struct tkip_ctx *, struct ieee80211_key *, |
| struct sk_buff *, int); |
| static int tkip_decrypt(struct tkip_ctx *, struct ieee80211_key *, |
| struct sk_buff *, int); |
| |
| static void * |
| tkip_attach(struct ieee80211vap *vap, struct ieee80211_key *k) |
| { |
| struct tkip_ctx *ctx; |
| |
| _MOD_INC_USE(THIS_MODULE, return NULL); |
| |
| MALLOC(ctx, struct tkip_ctx *, sizeof(struct tkip_ctx), |
| M_DEVBUF, M_NOWAIT | M_ZERO); |
| if (ctx == NULL) { |
| vap->iv_stats.is_crypto_nomem++; |
| _MOD_DEC_USE(THIS_MODULE); |
| return NULL; |
| } |
| |
| ctx->tc_vap = vap; |
| ctx->tc_ic = vap->iv_ic; |
| return ctx; |
| } |
| |
| static void |
| tkip_detach(struct ieee80211_key *k) |
| { |
| struct tkip_ctx *ctx = k->wk_private; |
| |
| FREE(ctx, M_DEVBUF); |
| |
| _MOD_DEC_USE(THIS_MODULE); |
| } |
| |
| 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_vap, 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 sk_buff *skb, u_int8_t keyid) |
| { |
| struct tkip_ctx *ctx = k->wk_private; |
| struct ieee80211vap *vap = ctx->tc_vap; |
| struct ieee80211com *ic = ctx->tc_ic; |
| u_int8_t *ivp; |
| int hdrlen; |
| |
| /* |
| * Handle TKIP counter measures requirement. |
| */ |
| if (vap->iv_flags & IEEE80211_F_COUNTERM) { |
| #ifdef IEEE80211_DEBUG |
| struct ieee80211_frame *wh = |
| (struct ieee80211_frame *) skb->data; |
| #endif |
| |
| IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, |
| "Discard frame due to countermeasures (%s)", __func__); |
| vap->iv_stats.is_crypto_tkipcm++; |
| return 0; |
| } |
| hdrlen = ieee80211_hdrspace(ic, skb->data); |
| |
| /* |
| * Copy down 802.11 header and add the IV, KeyID, and ExtIV. |
| */ |
| ivp = skb_push(skb, tkip.ic_header); |
| 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, skb, 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 sk_buff *skb0, int force) |
| { |
| struct tkip_ctx *ctx = k->wk_private; |
| |
| if (force || (k->wk_flags & IEEE80211_KEY_SWMIC)) { |
| struct ieee80211_frame *wh = |
| (struct ieee80211_frame *) skb0->data; |
| struct ieee80211vap *vap = ctx->tc_vap; |
| struct ieee80211com *ic = ctx->tc_ic; |
| int hdrlen; |
| struct sk_buff *skb; |
| size_t data_len; |
| uint8_t mic[IEEE80211_WEP_MICLEN]; |
| |
| vap->iv_stats.is_crypto_tkipenmic++; |
| |
| skb = skb0; |
| data_len = skb->len; |
| while (skb->next != NULL) { |
| skb = skb->next; |
| data_len += skb->len; |
| } |
| if (skb_tailroom(skb) < tkip.ic_miclen) { |
| /* NB: should not happen */ |
| IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, |
| wh->i_addr1, |
| "No room for Michael MIC, tailroom %u", |
| skb_tailroom(skb)); |
| /* XXX statistic */ |
| return 0; |
| } |
| |
| hdrlen = ieee80211_hdrspace(ic, wh); |
| michael_mic(ctx, k->wk_txmic, |
| skb0, hdrlen, data_len - hdrlen, mic); |
| memcpy(skb_put(skb, tkip.ic_miclen), mic, tkip.ic_miclen); |
| } |
| 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 sk_buff *skb, int hdrlen) |
| { |
| struct tkip_ctx *ctx = k->wk_private; |
| struct ieee80211vap *vap = ctx->tc_vap; |
| struct ieee80211_frame *wh; |
| uint8_t *ivp; |
| u_int8_t tid; |
| |
| /* |
| * Header should have extended IV and sequence number; |
| * verify the former and validate the latter. |
| */ |
| wh = (struct ieee80211_frame *)skb->data; |
| |
| ivp = skb->data + hdrlen; |
| if ((ivp[IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) == 0) { |
| /* |
| * No extended IV; discard frame. |
| */ |
| IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, |
| "%s", "missing ExtIV for TKIP cipher"); |
| vap->iv_stats.is_rx_tkipformat++; |
| return 0; |
| } |
| /* |
| * Handle TKIP counter measures requirement. |
| */ |
| if (vap->iv_flags & IEEE80211_F_COUNTERM) { |
| IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, |
| "discard frame due to countermeasures (%s)", __func__); |
| vap->iv_stats.is_crypto_tkipcm++; |
| return 0; |
| } |
| |
| tid = 0; |
| if (IEEE80211_QOS_HAS_SEQ(wh)) |
| tid = ((struct ieee80211_qosframe *)wh)->i_qos[0] & IEEE80211_QOS_TID; |
| |
| ctx->rx_rsc = READ_6(ivp[2], ivp[0], ivp[4], ivp[5], ivp[6], ivp[7]); |
| if (ctx->rx_rsc <= k->wk_keyrsc[tid]) { |
| /* |
| * Replay violation; notify upper layer. |
| */ |
| ieee80211_notify_replay_failure(vap, wh, k, ctx->rx_rsc); |
| vap->iv_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, skb, hdrlen)) |
| return 0; |
| |
| /* |
| * Copy up 802.11 header and strip crypto bits. |
| */ |
| memmove(skb->data + tkip.ic_header, skb->data, hdrlen); |
| skb_pull(skb, tkip.ic_header); |
| while (skb->next != NULL) |
| skb = skb->next; |
| skb_trim(skb, skb->len - tkip.ic_trailer); |
| |
| return 1; |
| } |
| |
| /* |
| * Verify and strip MIC from the frame. |
| */ |
| static int |
| tkip_demic(struct ieee80211_key *k, struct sk_buff *skb0, int hdrlen) |
| { |
| struct tkip_ctx *ctx = k->wk_private; |
| struct sk_buff *skb; |
| size_t pktlen; |
| struct ieee80211_frame *wh ; |
| u_int8_t tid; |
| |
| skb = skb0; |
| pktlen = skb->len; |
| while (skb->next != NULL) { |
| skb = skb->next; |
| pktlen += skb->len; |
| } |
| wh = (struct ieee80211_frame *) skb0->data; |
| /* NB: skb left pointing at last in chain */ |
| if (k->wk_flags & IEEE80211_KEY_SWMIC) { |
| struct ieee80211vap *vap = ctx->tc_vap; |
| u8 mic[IEEE80211_WEP_MICLEN]; |
| u8 mic0[IEEE80211_WEP_MICLEN]; |
| |
| vap->iv_stats.is_crypto_tkipdemic++; |
| |
| michael_mic(ctx, k->wk_rxmic, |
| skb0, hdrlen, pktlen - (hdrlen + tkip.ic_miclen), |
| mic); |
| /* XXX assert skb->len >= tkip.ic_miclen */ |
| memcpy(mic0, skb->data + skb->len - tkip.ic_miclen, |
| tkip.ic_miclen); |
| if (memcmp(mic, mic0, tkip.ic_miclen)) { |
| /* NB: 802.11 layer handles statistic and debug msg */ |
| ieee80211_notify_michael_failure(vap, wh, k->wk_keyix); |
| return 0; |
| } |
| } |
| /* |
| * Strip MIC from the tail. |
| */ |
| skb_trim(skb, skb->len - tkip.ic_miclen); |
| |
| /* |
| * Ok to update rsc now that MIC has been verified. |
| */ |
| tid = 0; |
| if (IEEE80211_QOS_HAS_SEQ(wh)) |
| tid = ((struct ieee80211_qosframe *)wh)->i_qos[0] & IEEE80211_QOS_TID; |
| k->wk_keyrsc[tid] = ctx->rx_rsc; |
| |
| return 1; |
| } |
| |
| /* |
| * Host AP crypt: host-based TKIP encryption implementation for Host AP driver |
| * |
| * Copyright (c) 2003-2004, Jouni Malinen <jkmaline@cc.hut.fi> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. See README and COPYING for |
| * more details. |
| * |
| * Alternatively, this software may be distributed under the terms of BSD |
| * license. |
| */ |
| |
| static const __u32 crc32_table[256] = { |
| 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, |
| 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, |
| 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, |
| 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, |
| 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, |
| 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, |
| 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, |
| 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, |
| 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, |
| 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, |
| 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, |
| 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, |
| 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, |
| 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, |
| 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, |
| 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, |
| 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, |
| 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, |
| 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, |
| 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, |
| 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, |
| 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, |
| 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, |
| 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, |
| 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, |
| 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, |
| 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, |
| 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, |
| 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, |
| 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, |
| 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, |
| 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, |
| 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, |
| 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, |
| 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, |
| 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, |
| 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, |
| 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, |
| 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, |
| 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, |
| 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, |
| 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, |
| 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, |
| 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, |
| 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, |
| 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, |
| 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, |
| 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, |
| 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, |
| 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, |
| 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, |
| 0x2d02ef8dL |
| }; |
| |
| static __inline u16 |
| RotR1(u16 val) |
| { |
| return (val >> 1) | (val << 15); |
| } |
| |
| static __inline u8 |
| Lo8(u16 val) |
| { |
| return val & 0xff; |
| } |
| |
| static __inline u8 |
| Hi8(u16 val) |
| { |
| return val >> 8; |
| } |
| |
| static __inline u16 |
| Lo16(u32 val) |
| { |
| return val & 0xffff; |
| } |
| |
| static __inline u16 |
| Hi16(u32 val) |
| { |
| return val >> 16; |
| } |
| |
| static __inline u16 |
| Mk16(u8 hi, u8 lo) |
| { |
| return lo | (((u16) hi) << 8); |
| } |
| |
| static __inline u16 |
| Mk16_le(const __le16 *v) |
| { |
| return le16_to_cpu(*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 __le16 *) &TK[0])); |
| PPK[1] += _S_(PPK[0] ^ Mk16_le((const __le16 *) &TK[2])); |
| PPK[2] += _S_(PPK[1] ^ Mk16_le((const __le16 *) &TK[4])); |
| PPK[3] += _S_(PPK[2] ^ Mk16_le((const __le16 *) &TK[6])); |
| PPK[4] += _S_(PPK[3] ^ Mk16_le((const __le16 *) &TK[8])); |
| PPK[5] += _S_(PPK[4] ^ Mk16_le((const __le16 *) &TK[10])); |
| |
| PPK[0] += RotR1(PPK[5] ^ Mk16_le((const __le16 *) &TK[12])); |
| PPK[1] += RotR1(PPK[0] ^ Mk16_le((const __le16 *) &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 __le16 *) &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 sk_buff *skb0, u_int off, size_t data_len) |
| { |
| #define S_SWAP(a,b) do { uint8_t t = S[a]; S[a] = S[b]; S[b] = t; } while(0) |
| struct sk_buff *skb = skb0; |
| uint32_t i, j, k, crc; |
| size_t buflen; |
| uint8_t S[256]; |
| uint8_t *pos, *icv; |
| |
| /* 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; |
| pos = skb->data + off; |
| buflen = skb->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 (skb->next == NULL) { |
| KASSERT(data_len == 0, |
| ("missing data, data_len %u", (int)data_len)); |
| break; |
| } |
| skb = skb->next; |
| pos = skb->data; |
| buflen = skb->len; |
| } |
| crc = ~crc; |
| |
| icv = skb_put(skb, tkip.ic_trailer); |
| /* 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]; |
| } |
| #undef S_SWAP |
| } |
| |
| static int |
| wep_decrypt(u8 *key, struct sk_buff *skb, u_int off, size_t data_len) |
| { |
| #define S_SWAP(a,b) do { uint8_t t = S[a]; S[a] = S[b]; S[b] = t; } while(0) |
| 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 = skb->data + off; |
| buflen = skb->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++; |
| } |
| if (skb->next == NULL) { |
| if (data_len != 0) { |
| /* XXX msg? stat? cannot happen? */ |
| return -1; |
| } |
| break; |
| } |
| skb = skb->next; |
| pos = skb->data; |
| buflen = skb->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; |
| #undef S_SWAP |
| } |
| |
| |
| 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, u8 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 sk_buff *skb, 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((struct ieee80211_frame *) skb->data, 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 = skb->data + off; |
| space = skb->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; |
| skb = skb->next; |
| if (skb == NULL) { |
| KASSERT(0, ("out of data, data_len %lu\n", |
| (unsigned long)data_len)); |
| break; |
| } |
| if (space != 0) { |
| const uint8_t *data_next; |
| /* |
| * Block straddles buffers, split references. |
| */ |
| data_next = skb->data; |
| KASSERT(skb->len >= sizeof(uint32_t) - space, |
| ("not enough data in following buffer, " |
| "skb len %u need %u\n", skb->len, |
| (int)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 = skb->len - 3; |
| break; |
| case 2: |
| l ^= get_le32_split(data[0], data[1], |
| data_next[0], data_next[1]); |
| data = data_next + 2; |
| space = skb->len - 2; |
| break; |
| case 3: |
| l ^= get_le32_split(data[0], data[1], |
| data[2], data_next[0]); |
| data = data_next + 1; |
| space = skb->len - 1; |
| break; |
| } |
| michael_block(l, r); |
| data_len -= sizeof(uint32_t); |
| } else { |
| /* |
| * Setup for next buffer. |
| */ |
| data = skb->data; |
| space = skb->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 sk_buff *skb0, int hdrlen) |
| { |
| struct ieee80211_frame *wh = (struct ieee80211_frame *) skb0->data; |
| struct ieee80211vap *vap = ctx->tc_vap; |
| struct sk_buff *skb; |
| size_t pktlen; |
| |
| vap->iv_stats.is_crypto_tkip++; |
| |
| skb = skb0; |
| pktlen = skb->len; |
| while (skb->next != NULL) { |
| skb = skb->next; |
| pktlen += skb->len; |
| } |
| if (skb_tailroom(skb) < tkip.ic_trailer) { |
| /* NB: should not happen */ |
| IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, |
| wh->i_addr1, "No room for TKIP CRC, tailroom %u", |
| skb_tailroom(skb)); |
| /* XXX statistic */ |
| return 0; |
| } |
| |
| 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, |
| skb0, hdrlen + tkip.ic_header, |
| pktlen - (hdrlen + tkip.ic_header)); |
| |
| 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 sk_buff *skb0, int hdrlen) |
| { |
| struct ieee80211_frame *wh = (struct ieee80211_frame *) skb0->data; |
| struct ieee80211vap *vap = ctx->tc_vap; |
| struct sk_buff *skb; |
| size_t pktlen; |
| u32 iv32; |
| u16 iv16; |
| u_int8_t tid; |
| |
| vap->iv_stats.is_crypto_tkip++; |
| |
| skb = skb0; |
| pktlen = skb->len; |
| while (skb->next != NULL) { |
| skb = skb->next; |
| pktlen += skb->len; |
| } |
| /* NB: tkip_decap already verified header and left seq in rx_rsc */ |
| iv16 = (u16) ctx->rx_rsc; |
| iv32 = (u32) (ctx->rx_rsc >> 16); |
| |
| wh = (struct ieee80211_frame *) skb0->data; |
| tid = 0; |
| if (IEEE80211_QOS_HAS_SEQ(wh)) |
| tid = ((struct ieee80211_qosframe *)wh)->i_qos[0] & IEEE80211_QOS_TID; |
| if (iv32 != (u32)(key->wk_keyrsc[tid] >> 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: skb is unstripped; deduct headers + ICV to get payload */ |
| if (wep_decrypt(ctx->rx_rc4key, |
| skb0, hdrlen + tkip.ic_header, |
| pktlen - (hdrlen + tkip.ic_header + tkip.ic_trailer))) { |
| if (iv32 != (u32)(key->wk_keyrsc[tid] >> 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(vap, IEEE80211_MSG_CRYPTO, |
| "[%s] TKIP ICV mismatch on decrypt (keyix %d, rsc %llu)\n", |
| ether_sprintf(wh->i_addr2), key->wk_keyix, ctx->rx_rsc); |
| vap->iv_stats.is_rx_tkipicv++; |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* |
| * Module glue. |
| */ |
| MODULE_AUTHOR("Errno Consulting, Sam Leffler"); |
| MODULE_DESCRIPTION("802.11 wireless support: TKIP cipher"); |
| #ifdef MODULE_LICENSE |
| MODULE_LICENSE("Dual BSD/GPL"); |
| #endif |
| |
| static int __init |
| init_crypto_tkip(void) |
| { |
| ieee80211_crypto_register(&tkip); |
| return 0; |
| } |
| module_init(init_crypto_tkip); |
| |
| static void __exit |
| exit_crypto_tkip(void) |
| { |
| ieee80211_crypto_unregister(&tkip); |
| } |
| module_exit(exit_crypto_tkip); |