That is where I started. The site does not have any concrete examples (that I have come across). I need to gather the x509 certificate and verify the signature. Then I need to pull out the attributes. I may be making things very simplistic, but I may be able to do this with out specific SAML functions. All I need to do is find a function to decipher a signature. THe XML parsing is easy.
I was hoping someone would say - use this function and that function and you are all set.