/var/lib/one/remotes/auth/ is in opennebula 3.4.1-4.1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/var/lib/one/remotes/auth/dummy/
/var/lib/one/remotes/auth/dummy/authenticate
/var/lib/one/remotes/auth/ldap/
/var/lib/one/remotes/auth/ldap/authenticate
/var/lib/one/remotes/auth/plain/
/var/lib/one/remotes/auth/plain/authenticate
/var/lib/one/remotes/auth/quota/
/var/lib/one/remotes/auth/quota/authorize
/var/lib/one/remotes/auth/server_cipher/
/var/lib/one/remotes/auth/server_cipher/authenticate
/var/lib/one/remotes/auth/server_x509/
/var/lib/one/remotes/auth/server_x509/authenticate
/var/lib/one/remotes/auth/ssh/
/var/lib/one/remotes/auth/ssh/authenticate
/var/lib/one/remotes/auth/x509/
/var/lib/one/remotes/auth/x509/authenticate