Use of Provider ID in Redirect-Artifact Profile

["Kunal Gandhi" <kunal@amsoft.net>]

Hi all,

 

I need to verify my implementation and would appreciate any feedback.

 

I have implemented Redirect-Artifact Profile for authentication.

 

1. Upon verification of credentials, IDP does a redirect to the SP with a SAML Artifact

 

2. During the redirect, the IDP drops a common domain cookie on user's machine. The name of this cookie is the same as the 'ProviderID' in the SAML Artifact and its value is an identifier which can be resolved (by the SP) to get IDP's Artifact Resolution Service?

 

Is this a correct approach? Is there any security issue here?

 

2b. Can I just put the value of the cookie as the URI of the IDP's Artifact Resolution Service? This would save a step to resolve IDP's identifier. Is there any restriction as to what value the cookie can have?

 

Thanks in advance!

 

=kunal

 

+contact: http://public.xdi.org/=kunal