One link/area on a https site with a different SSL config?

[Patrick Lists]

Hi,

On a Wordpress website that works with a basic StartSSL certificate I 
wonder if it is possible to configure nginx (1.4.4) to use a separate 
self-signed cert with client certificate authentication for wp-login.php 
and any link in wp-admin/ ?

So the regular https://blog.example.org/[some/link] uses the StartSSL 
cert for the https session

But the https://blog.example.org/wp-login.php and 
https://blog.example.org/wp-admin/* use a self-signed certficate with 
client certificate authentication for the https session

Is that possible? If yes, any keywords or what to read up on are much 
appreciated.

Thanks,
Patrick