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Signed OTA firmware update

iVivek
Intellectual 350 points
Other Parts Discussed in Thread: CC2650, CC2640

For CC2650/40, does the boot loader verify the signature of the firmware when the firmware is upgraded over the air ? If yes, what is the way to provision custom keys on the device/Bootloader. If no, how can I make sure that only authorized firmware is flashed on the device.

  • 0
    TI__Guru** 105180 points
    Hi,

    The OAD example for CC2640 does not implement signed authentication of the firmware upgrade image. To do this, you would need to embed your key in the flash (i.e., BIM or CCA) and modify the BIM to do the signature check.

    Best wishes
  • 0 in reply to JXS
    Intellectual 350 points
    Thanks for the answer
    Is there a Document/Application note which explains how we can sign the firmware image and implement signature verification in the BIM ?
    Do you know if anyone has tried it ? I will have to use a software implementation of some a signature verification algorithm. I am wondering if its feasible to do it on this hardware. Any pointers ?