installed ports library audit?

[Gary Aitken]

I just mostly recovered from a system crash where /usr was corrupted and
had to be recovered using fsck; couldn't completely recover using the
journal.

I suspect the trashed files are in one of a few libraries.  I'm wondering
if there's an easy way to audit all files installed by given ports,
i.e. do an sha256 or something like that on each and compare with the known
good if it's available somewhere?

Gary