Generating X.509 Certificates

I am new to Google API and I an trying to import a users Google contacts to my web-a开发者_C百科pplication. In between, there is an error which says :

Consumer does not have a cert: www.spats.in

It looks like I need something called a X.509 certificate for my server. Any ideas where to get it from?

Okkay....I figured it out myself. I used the cPanel to generate a .crt certificate. I just did it by trial and error and it works now.