S32K146-Get current key counter value

sochoi — Thu, 07 Nov 2024 08:00:06 GMT

I want to get the counter value of the key currently stored in the security flash.

I checked the reference manual and documents explaining various CSE, flash memory, etc.

However, I couldn't find a way to get the key counter value.

I understand that key update can be executed only when the key counter value is known.

Please tell me how to get the current key counter value required for Key update.

Re: S32K146-Get current key counter value

lukaszadrapa — Thu, 07 Nov 2024 10:38:38 GMT

It's not possible to read the counter value. This would violate SHE specification. It's up to user to track the counter values on application level.

Regards,

Lukas