Generating Certificates

Generate RSA Private Key + CSR

openssl req -out newkey.csr -new -newkey rsa:[bits] -nodes -keyout priv.key

Generate Self Signed Certificate + Priv Key

openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:[bits] -keyout priv.key -out cert.crt

Generate CSR for existing Cert

openssl x509 -x509toreq -in cert.crt -out newreq.csr -signkey priv.key