Jaime, don't rule out a simple arithmetic operation too soon. The VW eUp for example simply applies key = seed + passcode (each 32 bits). The "security" is achieved here by obscurity, i.e. people simply need to know the function specific passcode. As you've got access to a device that implements the access scheme, a decoding vector could be reading the firmware. Regards, Michael Am 12.10.22 um 07:35 schrieb Chris van der Meijden:
Hi Jaime
Cool project on an interesting car.
I can't help you directly on decyphring the seed-keys, but I found information on the Tesla key algorithms recently:
https://gist.github.com/darconeous/2cd2de11148e3a75685940158bddf933
Perhaps you can find some hints there. Only a guess, but perhaps worth reading.
Regards
Chris
Am Dienstag, dem 11.10.2022 um 17:20 -0300 schrieb Jaime Middleton:
Hi all, I am currently working on the implementation for the Maxus Euniq6. I have been able to decipher most of the metrics I wanted, but now I need to open and close doors. I was able to get access to a scanner for the car and sniff the can while the scanner opened and closed the doors. I mostly deciphered the interaction between the car and the scanner but there seems to be a seed-key algorithm in order to authenticate the scanner with the car. (I have ruled out a simple xor of bitshift). Any ideas on how to decipher this? I have a list of seed-keys and the chatter before in case someone wants to take a look. Any help is greatly appreciated.
Thanks,
Jaime Middleton
Software Engineer
Tucar Spa
------------------------------------------------------------------------
Tucar cell phone +56 9 42526635
Tucar cell phone jmiddleton@tucar.app <mailto:jmiddleton@tucar.app>
Tucar net www.tucar.app <https://www.tucar.app>
Tucar location Plaza Yolanda 80, Las Condes, Santiago de Chile
_______________________________________________ OvmsDev mailing list OvmsDev@lists.openvehicles.com http://lists.openvehicles.com/mailman/listinfo/ovmsdev
_______________________________________________ OvmsDev mailing list OvmsDev@lists.openvehicles.com http://lists.openvehicles.com/mailman/listinfo/ovmsdev
-- Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal Fon 02333 / 833 5735 * Handy 0176 / 206 989 26