INNER CODE UNIT · Python

make_header

wolfSSL/wolfBoot · tools/keytools/sign.py:97

def make_header(image_file, fw_version, extra_fields=[]):
    img_size = os.path.getsize(image_file)
    # Magic header (spells 'WOLF')
    header = struct.pack('<L', WOLFBOOT_MAGIC)
    # Image size
    header += struct.pack('<L', img_size)

    # No pad bytes, version is aligned

    # Version field
    header += struct.pack('<HH', HDR_VERSION, HDR_VERSION_LEN)
    header += struct.pack('<L', fw_version)

    # Four pad bytes, so timestamp is aligned
    header += struct.pack('BB', HDR_PADDING, HDR_PADDING)
    header += struct.pack('BB', HDR_PADDING, HDR_PADDING)

    # Timestamp field

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