/usr/lib/ghc-doc/hoogle/libghc-cryptohash-doc.txt is in libghc-cryptohash-doc 0.11.9-4build7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-cryptohash-doc/html/cryptohash.txt