We need some chores to join without triggering the loop.
For example it's fine to run metrics, only when something else is
running.
Change-Id: I9d8bd16f59c28c540c8d72971bc4e233a8660c02
Currently the tool verifies:
* validity of plain_offset
* whether plain_size is smaller than encrypted_size
Change-Id: I9ec4fb5ead3356a196392c26ca377fcdb367138e