/usr/share/fusiondirectory/plugins/ is in fusiondirectory-plugin-gpg 1.0.8.8-3ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/fusiondirectory/plugins/addons/
/usr/share/fusiondirectory/plugins/addons/gpg/
/usr/share/fusiondirectory/plugins/addons/gpg/class_pgpServerInfo.inc
/usr/share/fusiondirectory/plugins/addons/gpg/main.inc
/usr/share/fusiondirectory/plugins/personal/
/usr/share/fusiondirectory/plugins/personal/gpg/
/usr/share/fusiondirectory/plugins/personal/gpg/class_gpgAccount.inc
/usr/share/fusiondirectory/plugins/personal/gpg/main.inc
/usr/share/fusiondirectory/plugins/personal/gpg/pgpKeySelect/
/usr/share/fusiondirectory/plugins/personal/gpg/pgpKeySelect/class_pgpKeySelect.inc
/usr/share/fusiondirectory/plugins/personal/gpg/pgpKeySelect/pgpKeySelect-filter.xml
/usr/share/fusiondirectory/plugins/personal/gpg/pgpKeySelect/pgpKeySelect-list.tpl
/usr/share/fusiondirectory/plugins/personal/gpg/pgpKeySelect/pgpKeySelect-list.xml