Single Sign on / SharePoint 2010

Question

We currently have a SP2010 farm, with a number of web applications all configured to used classic windows authentication. One of our service providers has an externally hosted application that we want to launch from our SharePoint 2010 portal and not have the user to login again. So I'm looking to implement SSO. The service provider has a SAML enabled login page that is expecting SAML tokens (the encrypted value is passed to a hidden input on the form).

What I need to know, is how can I generate these SAML tokens from SharePoint 2010? I also believe I will need some form of mapping, which links our AD users credentials to their credentials on the external system?

I appreciate this question is probably constantly asked, but the information out there is a little overwhelming and I'm looking for the most simple solution.

If anyone needs any more details please let me know and I'll furnish if I can.

Answer 1

to be honest I've discovered this is out of the realm of SharePoint, we just needed something generating SAML tokens with 2 attributes in the assertions, it was easier to code something up using this componentspace.com/Products/SAMLv20.aspx. Thanks everyone for your help.