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View Code? Open in Web Editor NEWSymmetric signing example for the SDK bootloader using a SHA256-based HMAC
Symmetric signing example for the SDK bootloader using a SHA256-based HMAC
I reverted to the previous dfu_init_template included with SDK9->
softdevice_information->firmware_id
goes to
SD_FWID_GET(MBR_SIZE)
I'd be curious to hear if you have any comments about this and if it may be an acceptable solution.
These are the steps I developed myself while implementing your signing project:
Aside from adding and modifying project source files,
Preprocessor
Target
^ Start = 0x39C00
^ Size = 0x6000
dfu_types.h
^ #define BOOTLOADER_REGION_START 0x00039C00
^ #define BOOTLOADER_SETTINGS_ADDRESS 0x0003FC00
I also added the key in dfu_init_template.c:
Would it be possible or worthwhile from a performance or storage space perspective to use the on-board AES coprocessor's CCM abilities to perform authentication instead of the HMAC?
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