Checksum Validation (SHA-256) for NRF9160

[Siddhant Yeole]

I am using the nrf9160 for an OTA firmware update application. After going through a lot of tickets and some documentation regarding the nrf, I have not been able to find anything detailing the possibility of using checksum validation for downloaded files when using nrf9160. If I wish to verify the SHA256 of a downloaded file (.bin) when using NRF9160, where could I find this checksum of the file and what is a possible way of accessing the same. As far as I understand, the DFU Bootloader settings support the NRF51 series and do not transition as is to the NRF91 series. If I could get any suggestions as to how I could move further with this, it would be extremely helpful. C

[Elfving]

Hi Siddhant!

Just letting you know that I am looking into it, and I will get back to you.

Best regards,

Elfving

[Elfving]

Hey again Siddhant!

It is true that the Bootloader settings that support nRF51 doesn't work with the 91 series.

You should use MCUboot for this. The security part of it is also built in to it, you don't have to worry about finding a checksum yourself. 

There is a lot of resources about it available there on its devpage.

Best regards,

Elfving

[Siddhant Yeole]

Thanks Elfving, I will have a look at the documentation and see what I can find from there!