title: Form based and Certificate based authentication in Spring Framework / Spring Security
body: <p>is it possible in spring framework to have 2 login implementation at the same time for the login page? Form login and Certificate based login (x509). I've tried either one of these method but combining them at the same time, it is hard for me to do it. Any idea how to enable these two methods? Any book or site reference that I can refer to regarding this?</p>
  
  <p>Thanks</p>