NCS v3.3.0] Inquire about the possibility of bypassing KMU key verification for single-slot operation

[YI YANRONG]

Hi Nordic Support Team,

We are currently evaluating the nRF54L05 DFU single-slot sample in NCS v3.3.0.

Our question is: Is it technically possible to configure the single-slot DFU or MCUboot to operate without the KMU key verification process? We would like to understand if there is any Kconfig option or build flag that allows bypassing the KMU for development or specific use cases.

Any clarification on this would be greatly appreciated.

Best regards,

Ryan

[Vidar Berg]

Hello Ryan,

It is technically possible but I am not sure if it has been tested. It looks like it should be sufficient to add SB_CONFIG_BOOT_SIGNATURE_TYPE_NONE=y to your build. Please give this a try and let me know if it works or not.

Thanks,

Vidar