/usr/lib/ipsec/libtls.so.0 is in libcharon-extra-plugins 5.3.5-1ubuntu3.8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ipsec/libtls.so.0.0.0
/usr/lib/ipsec/libtls.so.0.0.0