List of Slovenian root certificate authorities (CAs)
The following is the list of issuers of qualified digital certificates in Slovenia with URLs to the root certificates and certificate revocation lists.
Halcom CA
Certificate (natural persons): DER
Certificate (juristic persons): DER
CRL (natural persons): PEM
CRL (juristic persons): PEM
Observations
I could not find the link to AC NLB's CRL anywhere on their website. I called them by phone and they referred me to an email address (which was different from the one on their web page). I then sent an email with my question to the address and received a one-line, no hello, no signature response with the URL to the revocation list.
Also, AC NLB's CRL has a .crl extension, but is in fact PEM-encoded.
Converting between formats
You can convert between PEM and DER formats using openssl.
Converting certificates:
openssl x509 -in <input file> -inform <input format> -out <output file> -outform <output format>
Example (converting a certificate from DER to PEM format):
openssl x509 -in ACNLB.cer -inform DER -out ACNLB.pem -outform PEM
Converting CRLs:
openssl crl -in <input file> -inform <input format> -out <output file> -outform <output format>
Example (converting a CRL from PEM to DER format):
openssl crl -in acnlbcrl.crl -inform PEM -out acnlbcrl-der.crl -outform DER