I have a website, which has a signed certificate file (
website.crt) from a certificate authority (CA).
How do I make sure exactly, that this certificate is valid?
I know, that browsers do it automatically, but I want to do it by hand, with tools like openssl, so I can learn about the process, and understand what browser do exactly.
Let's assume, that I have one root certificate on my computer, and that there are other intermediate authorities. Also, for the sake of accuracy, it uses x.509 version 3 standard.