Dynamic authentication / One-time password
michael-dev at fami-braun.de
Fri Jul 20 05:48:57 EDT 2012
Am 20.07.2012 05:17, schrieb DaveM:
>> On 07/19/2012 09:36 PM, michael-dev wrote:
>>> radius hooks into hostapd_wpa_auth_get_psk in
>>> src/ap/wpa_auth_glue.c to
>>> deliver the psk fetched from radius (sta->psk).
>> Just what I was looking for! Thank you very much :)
> I added my five lines of code. So far I'm using a hardcoded
> psk will get re-calculated on every call to hostapd_wpa_auth_get_psk
> using PKCS5_PBKDF2_HMAC_SHA1. A client entering the correct
> can connect just fine. It is possible to disconnect and reconnect any
> number of times.
> But something is wrong. A) I can see that, on every connect request,
> hostapd_wpa_auth_get_psk is being called three times. Is this
> behavior somehow? I hope not.
maybe you'd like to set sta->psk during auth, as
hostapd_wpa_auth_get_psk is also called on rekeying.
> B) When a client enters a wrong passphrase, some part of hostapd goes
> into a tight loop. hostapd_wpa_auth_get_psk will then get called
> endlessly and I have to kill hostapd. Any idea what could cause this?
hostapd_wpa_auth_get_psk is an iterator, that means, you should have a
(virtual) list of unique key pointers to be iterated and
hostapd_wpa_auth_get_psk should return the key pointer after the
last_key parameter in the list. After the last key is reached (ie the
last on is passed as last key), the function should return NULL to break
that endless loop.
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