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e4bf4db907
Some deployed supplicants update their SNonce for every receive EAPOL-Key message 1/4 even when these messages happen during the same 4-way handshake. Furthermore, some of these supplicants fail to use the first SNonce that they sent and derive an incorrect PTK using another SNonce that does not match with what the authenticator is using from the first received message 2/4. This results in failed 4-way handshake whenever the EAPOL-Key 1/4 retransmission timeout is reached. The timeout for the first retry is fixed to 100 ms in the IEEE 802.11 standard and that seems to be short enough to make it difficult for some stations to get the response out before retransmission. Work around this issue by increasing the initial EAPOL-Key 1/4 timeout by 1000 ms (i.e., total timeout of 1100 ms) if the station acknowledges reception of the EAPOL-Key frame. If the driver does not indicate TX status for EAPOL frames, use longer initial timeout (1000 ms) unconditionally. |
13 years ago | |
|---|---|---|
| doc | 14 years ago | |
| eap_example | 15 years ago | |
| hostapd | 13 years ago | |
| mac80211_hwsim | 15 years ago | |
| patches | 16 years ago | |
| radius_example | 15 years ago | |
| src | 13 years ago | |
| testing | 17 years ago | |
| tests | 14 years ago | |
| wlantest | 13 years ago | |
| wpa_supplicant | 13 years ago | |
| www | 14 years ago | |
| .gitignore | 13 years ago | |
| COPYING | 17 years ago | |
| README | 14 years ago | |
| build_nsis.sh | 16 years ago | |
| build_release | 14 years ago | |
README
wpa_supplicant and hostapd -------------------------- Copyright (c) 2002-2011, Jouni Malinen <j@w1.fi> and contributors All Rights Reserved. These programs are dual-licensed under both the GPL version 2 and BSD license (the one with advertisement clause removed). Either license may be used at your option. This package may include either wpa_supplicant, hostapd, or both. See README file respective subdirectories (wpa_supplicant/README or hostapd/README) for more details. Source code files were moved around in v0.6.x releases and compared to earlier releases, the programs are now built by first going to a subdirectory (wpa_supplicant or hostapd) and creating build configuration (.config) and running 'make' there (for Linux/BSD/cygwin builds). License ------- GPL v2: 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. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA (this copy of the license is in COPYING file) Alternatively, this software may be distributed, used, and modified under the terms of BSD license: 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. Neither the name(s) of the above-listed copyright holder(s) nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.