Custom SSLSocketFactory
     PostgreSQL  provides a way for developers to customize how a SSL connection is
established. This may be used to provide a custom certificate source or other
extensions by allowing the developer to create their own
     
      SSLContext
     
     instance.
The connection URL parameters
     
      sslfactory
     
     allow the user to specify which custom
class to use for creating the
     
      SSLSocketFactory
     
     . The class name specified by
     
      sslfactory
     
     must extend ` javax.net.ssl.SSLSocketFactory` and be available to the driver’s classloader.
    
     This class must have a zero argument constructor or a single argument constructor preferentially taking
a
     
      Properties
     
     argument. There is a simple
     
      org.postgresql.ssl.DefaultJavaSSLFactory
     
     provided which uses the
default java SSLFactory.
    
     Information on how to actually implement such a class is beyond the scope of this
documentation. Places to look for help are the
     
      JSSE Reference Guide
     
     and the source to the
     
      NonValidatingFactory
     
     provided by the JDBC driver.