Hmmm... for that kind of stuff, I've found sslshopper's page to be very useful. https://www.sslshopper.com/article-most-common-openssl-commands.html https://www

Hmmm... for that kind of stuff, I've found sslshopper's page to be very useful. https://www.sslshopper.com/article-most-common-openssl-commands.html https://www.sslshopper.com/article-most-common-openssl-comma... And for the TLS handshake, this is incredibly useful: https://tls.ulfheim.net https://tls.ulfheim.net (The Illustrated TLS Connection). Towards the bottom of this page, you now have TLS 1.3 illustrated as well.