[Zope-PAS] using zope as sso server??

[robert rottermann]

Hi there,
we are migration a zope 2.6 intranet to plone 3.1xx.
during migration (which will be operformed in several steps over some months) we 
would like to use the old intranet as "login server" such, that users get their 
credentials automatically transferred to the plone site while they are logged 
into the old intranet.

is there a pas module that could do this?

thanks
robert