I've been tasked to move one domain/subdomains to HTTPS. We already have a Wildcard SSL certificate from RapidSSL, but I'm a bit confused on the overall process.
I can get the Intermediate CA .cer and ssl_certificatie .cer from RapidSSL, but I sort of lose it after that. I see that there is an option on the App Engine for uploading SSL certificates (see screenshot below), but I have no clue what the PEM encoded X.509 public key certificate or Unencrypted PEM encoded RSA private key are and where to get them.
Does anyone have any guidance?