Re-synch MAC failed during UE attach process about open5gs HOT 5 CLOSED

Could you give me a wireshark packet capture file? If you give me K, OPc, AMF, it is helpful to solve the problem.

Thank you for your effort.

from open5gs.

Thank you so much for your prompt answer.

Please find attached (here: captures.zip ) a zip file containing 2 pcaps : dump.lo.pcap which contains all the traffic on the loopback interface (so everything internal to nextepc) and dump.enb.pcap, which contains all the traffic between the eNB and nextepc.

Concerning K, OPc and AMF they are included in the mongoDB quote in my previous message :)

from open5gs.

IMHO, it is a different issue with (#11). Authentication failure type is not resync-failure, but MAC failure.

Is USIM using Milenage Algorithm? Current, NextEPC is not supporting XOR and TUAK. Milenage algorithm is only supported. And also, please re-check K, OPc, and AMF of USIM.

Nevertheless, NextEPC needs to add one more feature related to MAC failure of authentication failure. This feature is not supported at this point.

Thanks!

from open5gs.

I've updated the handler related to authentication failure.

Previously, I sent Authentication request regardless EMM_CAUSE of Authentication failure. In other worlds, re-authorization was always performed. Currently, Re-authorization only works when EMM Cause is synch-failure. If EMM cause is not synch-failure, MME will send an Authentication reject.

BTW, this updates is not solving your problem. I think that security parameter should be matched between USIM and MongoDB. What happened? Are you succeeding to pass the authorization process?

Feel free to raise any problem if you need to help.

Thanks!

from open5gs.

Hi,
I double checked my SIM card config and programmed a new SIM card with new IMSI/OPc/... values just to be sure.
The authantifcation process seems to work fine now... I don't understand why, but I probably did some mistake with the programmation of the first SIM card.

Anyway thank you for your prompt answer and sorry for the trouble...

from open5gs.