Download NoWires root certificate here: DER encoded root certificate, or PEM encoded root certificate.
Download Skandiabank root certificate here: DER encoded root certificate

Either certificate will work with your web-browser. To include the certificate in the OpenSSL CA list, download the PEM encoded certificate, and append it to /usr/share/ssl/certs/ca-bundle.crt on a RedHat like system (required for subversion and other stuff relying on OpenSSL).