How is a private key encrypted in a pem certificate?

Question

As part of trying to debug an issue, I am trying to understand how a private key is encrypted in a pem certificate, because I am wondering whether curl

Answer 1

If you are using passphrase, of course your key is encrypted !

A passphrase is a word or phrase that protects private key files. It prevents unauthorized users from encrypting them. Usually it's just the secret encryption/decryption key used for Ciphers.