owner-nrf52sdk/nRF5_SDK_15.3.0/components/libraries/bootloader/dfu/dfu-cc.options

dfu.Hash.hash                       max_size:32
dfu.SignedCommand.signature         max_size:64
dfu.InitCommand.sd_req              max_count:16
dfu.InitCommand.boot_validation     max_count:3
dfu.BootValidation.bytes            max_size:64