Can CLIENT-CERT auth-method be used with a JDBC realm within tomcat?

Question

The JDBC realm specifies a table structure for authentication which contains the columns defined by the attributes userNameCol and userCredCol. These correspond to user and password which makes sense for FORM or BASIC auth-methods. They are interactive and require these two pieces from the client's user.

• What comes back from the certificate?
• What would an example of the data stored in userNameCol and userCredCol look like?
• Is there an alternative table structure for the realm in this case?

PS - I'm using tomcat 5.5.x.