Questions with wep keys for WinXP

Jouni Malinen jkmaline at cc.hut.fi
Mon Jun 23 21:36:28 EDT 2003


On Mon, Jun 23, 2003 at 02:16:42PM +0000, Haidong Xia wrote:

> I feel very confused with the broadcast, and unicast key.  In hostapd.conf 
> file, it says you need to set the WinXp work around.  If hostap sends both 
> broadcast, and unicast keys to WinXP, the work-around will make the two 
> keys as unicast keys, when WinXP receives them.

Please re-read the comment about the workaround.. It is needed _only_ if
you are not using individual keys. Enabling both broadcast and unicast
keys is enough to make WinXP Supplicant happy with the EAPOL-Key
packets.

> The question is how WinXP which key is used for broadcast, and which is 
> used for unicast.

There is a flag in key_index field of the EAPOL-Key telling whether the
key is broadcast (default key) or unicast (key mapping key).

-- 
Jouni Malinen                                            PGP id EFC895FA



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