Category Archives: Windows Identity Foundation

Starter STS

At my company we we’re looking at creating a generic STS that does not require Active Directory Federation Services 2.0, and we were also thinking about putting it up on CodePlex. Dominick Baier from Thinktecture beat us to it with StarterSTS. He’s also posted some webcasts on how to use it. Good stuff, so instead rolling our own, we’ll be using/extending this one.

System.IdentityModel.Claims.ClaimTypes vs. Microsoft.IdentityModel.Claims.ClaimTypes

Windows Identity Foundation introduces a new ClaimTypes class. It contains predefined claim type URIs for claims defined by OASIS and Microsoft. In the WIF SDK project templates for a custom STS this ClaimTypes class is mixed with the one already in System.IdentityModel.Claims, which is rather confusing. So, what’s the difference?


Functionally: None. All claim type URIs in Microsoft.IdentityModel.Claims.ClaimTypes are identical to corresponding types in System.IdentityModel.Claims.ClaimTypes. That said, Microsoft.IdentityModel.Claims.ClaimTypes adds a few new claim types.


Technically: Claim types in System.IdentityModel.Claims.ClaimTypes are defined as static read only string properties, whereas in Microsoft.IdentityModel.Claims.ClaimTypes the claim types are string constants.


My advice: for clarity always use Microsoft.IdentityModel.Claims.ClaimTypes.

Windows Identity Foundation released

Windows Identity Foundation, formerly known as “Geneva”, has shipped. I’ve been talking about Geneva/WIF on several occasions and I absolutely love it. It opens the door for a whole new realm of authentication/authorization scenario’s. SharePoint 2010 will be the first Microsoft Product to support it, apart from the new Active Directory Federation Services 2.0, which was part of the development effort and was formerly known as “Geneva” Server. Be sure to check it out!