The recommended way to implement a new SSO solution that captures the SSO header is to:

A: Create an Ext plugin that adds a sen/let filter to capture the SSO header B: Create a hook plugin that implements a servlet filter to capture the SSO header C: Modify the portal source code and create an SSO servlet filter in the portal to capture the SSO header D: Create a hook plugin to override the Struts action for the Login portlet to capture the SSO header