Checksum verification of Firmware

Aryan_Ghadge · March 25, 2023, 12:56pm

I’m creating secure firmware for my drone. I achieved the signing of the firmware. I was wondering does Ardupilot do the checking of the checksum of the firmware file? For example, the checksum of the correct firmware file could be stored on the flight module. Each time the drone boots up, similar to the checking of the public and private keys, it also check the checksum of the current firmware and the checksum value stored in the flight module. This way you ensure you have the firmware file from the authentic source without any parameters being changed. So is this a thing in ardupilot or how would you implement automatic checksum checking?

amilcarlucas · March 25, 2023, 1:32pm

Read the APJ tool documentation and the firmware signing documentation

M.G.sathiyanarayanan · August 25, 2023, 10:47am

Hi @Aryan_Ghadge Need your help
Have you completed the automatic checksum checking???
How do you achieve that…Thanks in advance…

khancyr · August 25, 2023, 1:36pm

From my reading that is already done on boot :

github.com

ArduPilot/ardupilot/blob/master/libraries/AP_CheckFirmware/AP_CheckFirmware.cpp#L175C19-L175C38


      
          check_fw_result_t check_good_firmware(void)

github.com

ArduPilot/ardupilot/blob/4e44ee1a07e5b665438c2a7d8343d792a2b9ed4c/Tools/AP_Bootloader/AP_Bootloader.cpp#L112


      
              else if ((m & 0xFFFFFF00) == RTC_BOOT_CANBL) {
                  try_boot = false;
                  timeout = 10000;
                  can_set_node_id(m & 0xFF);
              }
              if (can_check_update()) {
                  // trying to update firmware, stay in bootloader
                  try_boot = false;
                  timeout = 0;
              }
              const auto ok = check_good_firmware();
              if (ok != check_fw_result_t::CHECK_FW_OK) {
                  // bad firmware CRC, don't try and boot
                  timeout = 0;
                  try_boot = false;
                  led_set(LED_BAD_FW);
              }
          #ifndef BOOTLOADER_DEV_LIST
              else if (timeout != 0) {
                  // fast boot for good firmware
                  try_boot = true;

M.G.sathiyanarayanan · August 28, 2023, 7:55am

Data Checksum failed

How to generate the Data check verification failed Error By changing the parameters…

scarletwitch · October 19, 2023, 9:16am

hi, did you solve this? could you please explain the process followed. thanks in advance

Software_Indo_Wings · December 4, 2023, 11:00am

Hi @M.G.sathiyanarayanan can you please help me. I am also stuck on the same step.

Vidya_Patil · March 21, 2024, 3:33am

@M.G.sathiyanarayanan , Can you please guide me on how to achieve this checksum verification.
I have followed Secure boot process mentioned on ardupilot documentation. Do I need to change any script to get this checksum verification. Kindly guide me on this.