Switch external CA generation from certutil to python-cryptography
as this way of handling the certificates should be more readable,
maintainable and extendable (e.g. extensions handling).
Also as external CA is now a separate module we can import it and
use elsewhere.
https://pagure.io/freeipa/issue/7154
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>
The --external_cert_file and --external_ca_file options of ipa-server-install
and ipa-ca-install have been replaced by --external-cert-file option which
accepts multiple files. The files are accepted in PEM and DER certificate and
PKCS#7 certificate chain formats.
https://fedorahosted.org/freeipa/ticket/4480
Reviewed-By: Petr Viktorin <pviktori@redhat.com>