Deploying ADF application with both HTTP Client Authentication(Public Key Certificate) and Form-Based Authentication

To Start with, implement security for the application with Form Based Authentication by specifying the login page, error page and default page

Then to configure  HTTP Client Authentication(Public Key Certificate) Go To -> Web.xml of the application and -> manually change <auth-method>FORM</auth-method> to <auth-method>CLIENT-CERT,FORM</auth-method> 

          Now if the application is deployed to single sign on, the application would be authenticated with HTTP Client Authentication(Public Key Certificate) . If the application is deployed as standalone  on LDAP it would require Form Based Authentication to login