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As WIF talks WS-Trust / WS-Federation under the hood, you can expose claims-based authentication at the services layer. This article shows how to create a WCF STS that will talk to external clients using these protocols. <a href="http://msdn.microsoft.com/en-us/library/ee748498.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ee748498.aspx</a> From an authorisation point of view at the services layer you can use a custom authorisation manager to check that claims have been presented. <a href="http://msdn.microsoft.com/en-us/library/ms731774.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ms731774.aspx</a> To plug in external identity services such as OpenID and add your own claims into those generated by WIF then you can sub-class from ClaimsAuthenticationManager as follows: <code> public class MyClaimsAuthenticationManager : ClaimsAuthenticationManager { <pre><code> public override IClaimsPrincipal Authenticate(string resourceName, IClaimsPrincipal incomingPrincipal) { if (!incomingPrincipal.Identity.IsAuthenticated) { return incomingPrincipal; } //TODO: obtain user profile claims from external source, i.e. database, web service // below code demonstrates how to custom claims to the current principal // (which are then persisted for the lifecycle of the user's browser session) IClaimsIdentity identity = (IClaimsIdentity)incomingPrincipal.Identity; identity.Claims.Add(new Claim(ClaimTypes.Email, "dave@dave.com")); return incomingPrincipal; } } </code></pre> </code> You'll need to tell WIF to use your own claims manager in the Web.config file by setting the claimsAuthenticationManager configuration parameter. Hope this helps.
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1. PO.net n-tier identity & authorization in service architecture
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1. COOne thing I ought to clarify is that the WCF authorisation manager link I posted uses the WCF claims classes, and that you should use the Microsoft.IdentityModel namespace if you're deploying the services behind WIF.
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