My use case is that I want to use different authentication handlers for different sites. We already have SAML integrated with an IDP for one site. But we also want to use the OOTB Login component to authenticate users in the AEM User list. Right now SAML overrides everything.
As you've noticed, the SAML Authentication Handler can effectively be used only against a single IDP because it relies on a common location for the certificates and keys. To be clear, the original post was about combining the SAML handler with a different handler.
If you need to connect to multiple IDPs, you will have to write your own SAML handler (presuamably extending the OOTB one) or work with Adobe support to get support for multiple IDPs added to the product.
Thanks Justin for the information. I am presuming you are referring to system/console/slingauth, to configure the path.
Another variation to my question is: What if I want a form login authentication to work? right now j_security_check gets overridden by the SAML authentication. How do I (or is there documentation on how to) create another customized (multiple) authentication suffix(es) to direct to multiple AEM Authentication Handler(s).