# ...
idp.signing.key= /etc/ssl/private/idp-dev.uni-beispiel.de.key.pem
idp.signing.cert= /etc/ssl/localcerts/idp-dev.uni-beispiel.de.crt.pem
idp.encryption.key= /etc/ssl/private/idp-dev.uni-beispiel.de.key.pem
idp.encryption.cert= /etc/ssl/localcerts/idp-dev.uni-beispiel.de.crt.pem
# ...