code: def keyhandles_fixup(args):
      
      new_handles = {}
      for val in args.key_handles:
          n = pyhsm.util.key_handle_to_int(val)
          new_handles[n] = val
  
      args.key_handles = new_handles
docs: Walk through the supplied key handles and normalize them, while keeping
      the input format too (as value in a dictionary). The input format is
      used in AEAD filename paths.