Fwd: eap-fast: using eap-fast-mschapv2 in anonymous tunnel

Isaac Boukris iboukris at gmail.com
Sat Sep 23 13:40:45 CEST 2017

Hi Alan,

On Sat, Sep 23, 2017 at 4:47 AM, Alan DeKok <aland at deployingradius.com> wrote:
> On Sep 22, 2017, at 9:05 PM, Isaac Boukris <iboukris at gmail.com> wrote:
>> I've been trying to test eap-fast unauthenticated provisioning (RFC
>> 5422), and was getting mschap errors, for which I think I found a fix
>> - see attached patch (v3.0x).
>> With this patch, the mschap authentication stage succeeds using
>> eapol_test and a tunnel-pac is provisioned (while the first eapol
>> exchange ends with reject as allowed by the RFC, the subsequent
>> authentication successes using the newly provisioned pac).
>   That looks good, thanks.


>> I also tried out the v4.0x branch but encountered some other issues.
>> First had to add a cast to float when comparing with tls_max_version
>> (inst->tls_conf->tls_max_version > (float) 1.1), as otherwise:
>> float x = 1.1; if (x > 1.1) yields true for some reason.
>   Floats are notorious for that kind of thing...

To me this seem insane.
See attached patch with some more casting, including the actual one,
preventing tlsv1.1 with eap-fast, in rlm_eap_fast.c file.

>> Then however, I get a crash which I can't figure so far - logs with
>> back-trace attached.
>   That's a straightforward infinite recursion.  I've pushed a fix.

That stopped the crash. However eap-fast still fails for no obvious
reason and sometimes the server exits on assertion fail - see attached

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