Extracting Certificate.crt and PrivateKey.key from a Certificate.pfx File – GSX Help Center
OpenSSL – How to renew an expired SSL Certificate, so that the new SSL Certificate has the same Public Key as the old Certificate | University of South Wales: Cyber University of
Openssl Generate Private Key From Crt - terranew
How to Create Your Own SSL Certificate Authority for Local HTTPS Development
How can I find my certificate's Private Key? – HelpDesk | SSLs.com