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. 2024 Feb 23;24(5):1447. doi: 10.3390/s24051447
Algorithm 2 Synchronizing and verifying the firmware algorithm
  • 1:

    procedureSynchronizeAndVerifyRootHash(firmwareFiles)

  • 2:

        expectedRootHash← FetchFirmwareFromSecureStorage()

  • 3:

        existingFirmwareFiles← DownloadFirmware(URL)

  • 4:

        combinedFirmwareFiles← CombineFirmwareFiles(existingFirmwareFiles, firmwareFiles)

  • 5:

        leafNodes← []

  • 6:

        for each file in combinedFirmwareFiles do

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            hashValue← CalculateHash(file)

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            leafNodes.append(hashValue)

  • 9:

        end for

  • 10:

        merkleTree← BuildMerkleTree(leafNodes)

  • 11:

        computedRootHash← merkleTree.getRootHash()

  • 12:

        if computedRootHash != expectedRootHash then

  • 13:

            throwVerificationError(“RootHash MisMatch”)

  • 14:

        end if

  • 15:

        StoreFirmwareSecurely(firmwareFiles)

  • 16:

    end procedure