Encryption algorithms other than RSA

Description

My docker registry gives me a key encrypted with the ECDSA algoritm. At least, that's what I think when I read the key.pem

PEMParser pemParser = new PEMParser(new BufferedReader(new FileReader("key.pem")));
Object object = pemParser.readObject();
JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
if (object instanceof PEMKeyPair) {
  PEMKeyPair pair = (PEMKeyPair) object;
  converter.getPrivateKey(pair.getPrivateKeyInfo()).getAlgorithm()
}

Then DockerCertificates throws exception maybe because of line 97.

How to reproduce

Don't know. If your docker registry gives you ECDSA-encrypted key, then you can try.

What do you expect

Maybe bouncycastle can be used to find the encryption algorithm.

What happened instead

exception java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: Invalid RSA private key: Version must be 0 [Describe the actual results]

Software:

docker-maven-plugin:0.4.13

Full backtrace

[Paste full backtrace here]