Ad-hoc mode with WPA/WPA2 according to IEEE 802.11i

Jouni Malinen j
Fri Jun 1 17:16:32 PDT 2007

On Fri, Jun 01, 2007 at 11:09:42AM +0200, Rafael Uetz wrote:

> I was wondering if there is any way to use Ad-hoc mode (IBSS) with
> WPA/WPA2 as described in IEEE 802.11i or if this is intended for later
> releases of wpa_supplicant/hostapd. According to 802.11i, STAs negotiate
> pairwise keys using a 4-way-handshake and every STA creates its own
> group key.

The current wpa_supplicant version allows a shared TKIP or CCMP key to
be configured in a way that was described in WPA specification (i.e.,
_not_ in the way defined in IEEE 802.11i).

Support for IEEE 802.11i way of doing this (multiple pairwise
negotiations) is not yet supported, but it is on the to-do list.
However, it will also need driver changes, so it is not enough to just
add wpa_supplicant support for this. I'm not aware of any Linux driver
that would have support for this at the moment..

Jouni Malinen                                            PGP id EFC895FA

More information about the Hostap mailing list