Verifying PostgreSQL Certficates

Hello,

I have been wondering if the resource object returned from a 
pg_connect() or pg_pconnect() call can be parsed for certain 
information.  Specifically, I'm wondering if it contains information 
about the certificate and public key submitted by PostgreSQL when SSL is 
enabled.  I've looked at pg_parameter_status(), but it doesn't seem to 
get the information I need.  Ultimately, I would like to compare the 
signature on a certificate to a trusted certificate authority to 
determine the trustworthiness of the certificate.

Thanks much in advance.

--Angus Atkins-Trimnell