Hacking into a crypto-boot loader of an embedded controller LPC1759FBD80

It’s about a device used for emulating and turning off Ad-blue additive system in truck and construction machinery. It’s using J1939 protocol over can-bus.
Flashing a new version of firmware or changing options for current is possible using USB2CAN device, communication can be logged, but it’s obfuscated.
The code of the update files is pre-encrypted and works only once on a particular device having exact serial number match…

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