EAP-TLS with certificates, can it be done without knowing the date and time ?

[Jürgen Benjamin Ronshausen <b r rie eu>]

Hi,

regarding NetworkManger connecting to an EAP-TLS secured 802.1X network 
that uses client server certificates.

I cannot find information on wether it or not it is possible to 
authenticate as as supplicant against and authentication server without 
knowing the shared date and time.

I have seen an implementation from which i am pretty sure doesn't 
provide the supplicant with the current date and time. (This board has 
no battery for an RTC).

In my current setup if the supplicant doesn't know the shared date and 
time authentication fails because the Authentication server rejects the 
client certificate as invalid or expired.

Are there any means in 802.1X to supply the supplicant with the current 
time before it tries to authenicate against the authentication server ?

Regards,
Jürgen