/etc/digidocpp/certs/ is in libdigidocpp-common 0.3.0-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/etc/digidocpp/certs/EECCRCA.crt
/etc/digidocpp/certs/EID-SK 2007 OCSP 2010.crt
/etc/digidocpp/certs/EID-SK 2007 OCSP.crt
/etc/digidocpp/certs/EID-SK 2007.crt
/etc/digidocpp/certs/EID-SK 2011.crt
/etc/digidocpp/certs/EID-SK OCSP 2006.crt
/etc/digidocpp/certs/EID-SK OCSP.crt
/etc/digidocpp/certs/EID-SK.crt
/etc/digidocpp/certs/ESTEID-SK 2007 OCSP 2010.crt
/etc/digidocpp/certs/ESTEID-SK 2007 OCSP.crt
/etc/digidocpp/certs/ESTEID-SK 2007.crt
/etc/digidocpp/certs/ESTEID-SK 2011.crt
/etc/digidocpp/certs/ESTEID-SK OCSP 2005.crt
/etc/digidocpp/certs/ESTEID-SK OCSP.crt
/etc/digidocpp/certs/ESTEID-SK.crt
/etc/digidocpp/certs/JUUR-SK.crt
/etc/digidocpp/certs/KLASS3-SK 2010 OCSP.crt
/etc/digidocpp/certs/KLASS3-SK 2010.crt
/etc/digidocpp/certs/KLASS3-SK OCSP 2006.crt
/etc/digidocpp/certs/KLASS3-SK OCSP 2009.crt
/etc/digidocpp/certs/KLASS3-SK OCSP.crt
/etc/digidocpp/certs/KLASS3-SK.crt
/etc/digidocpp/certs/SK OCSP 2011.crt
/etc/digidocpp/certs/TEST-SK OCSP 2005.crt
/etc/digidocpp/certs/TEST-SK.crt