Server :: Switching From Openssl To Gnutls For Https Traffic On Apache

For some years now I have been able to use openssl (apache-mod_ssl) to process encrypted traffic because I had, in effect, only one host - the main server - as the sole entry in our ssl_vhost.conf file.

Now we are working toward serving a couple of more secure sites for closely related organizations, but with their own distinct identities. This, in the past, would have meant additional static IPs with matching nic cards for starters. But my understanding is that since 2007/8 we have been able to use gnutls (apache-mod_gnutls) which gets around the old problem of Apache not being able to direct name-based traffic because that would not yet have been decoded. This is referred to as SNI - Server Name Indication.

Here my confusion begins. Is there an overlap between SSL and TLS? For instance, I would have generated RSA keys and a self-signed certificate with the genrsa command. Is this sufficient for gnutls or does it need to generate its own keys and certificates? I realize gnutls is relatively a new kid on the block but it is appealing and I'd like to give it a try.

I am working with the Mandriva/Mageia cooker with an x86_64 architecture so all packages are up-to-the-minute.