EAP-AKA fast re-authentication using hostapd as library

samiran saha samiran.linux at gmail.com
Wed Feb 19 07:04:50 EST 2014


Hi,
    Thanks for your suggestion, but my real concern is about, after first
full authentication sm->EAP_state of server goes to EAP_SUCCESS state. For
another authentication (fast re-authentication) I have to change the
EAP_state from EAP_SUCCESS to some other state right? So, what would be
that state?


On Wed, Feb 19, 2014 at 4:56 PM, Jouni Malinen <j at w1.fi> wrote:

> On Wed, Feb 19, 2014 at 12:40:26PM +0530, samiran saha wrote:
> >         I am trying to implement server client program using hostapd as
> > library that will at first complete full authentication process and then
> it
> > will do fast re-authentication using the re-authentication id received
> from
> > server. I have completed the first step i.e. full authentication process
> > using EAP-AKA but can not proceed further for fast re-authentication
> > because after full authentication server goes to EAP-SUCCESS state and
> if I
> > reinitialize the state machine then it allocate new sm . So how can I do
> > fast re-authentication, any clue or does hostapd support fast
> > re-authentication at all?
>
> I'm not sure how you use "hostapd as a library", but anyway, hostapd as
> an independent process does support EAP-AKA fast re-authentication. The
> fast re-auth information is kept in memory by default, so if you
> reinitialize state completely, you will lose that data. You can enable
> CONFIG_SQLITE=y for the build and set eap_user_file to point to an
> SQLite database to use a database to store such information to
> persistent over hostapd restarts, so I'd assume that would work for you
> use case as well.
>
> --
> Jouni Malinen                                            PGP id EFC895FA
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