This checks to ensure a server is running on the specified host port.

generate CA and certificate signed by generated CA.

GenerateSelfSignedCert genereate self-signed certificate and returns public certificate in pem, private key in pem, error.

PrivDerToPem converts rsa private key from der to pem.

PubDerToPem converts public key from der format to pem.

This returns a random port for unit testing.

Create a dummy server for unittesting.