User authentication with 2 methods

[Peter Schober]

* Björn Urbanek <bjoernurbanek at gmx.de> [2013-11-14 15:50]:
> 1.) try to authenticate with the currently to computer logged in user (via
> NTLM (?))
> 2.) If it fails, then use Username/Password login handler, the users have to
> enter username/pwd 

Did you look at the Kerberos Login Handler?
https://wiki.shibboleth.net/confluence/display/SHIB2/Kerberos+Login+Handler
-peter