Regular visitors of this blog are used to seeing PowerShell and DevOps content, and this is a little bit of a divergence since it’s written in C#, and it’s a .NET Core MVC Azure Web App, but if it found itself on my plate, maybe it will find itself on yours. I was tasked with writing an Azure Web App that users would visit, sign into using their Azure Active Directory (ie: “Work or School”) account, to test if their Conditional Access and MFA was configured properly. Once logged in, a little information about the user is displayed.
Here’s how to pop all the claim information for an authenticated user into a Razor Page.
I decided to put the whole thing into an HTML table in order to make it a bit more readable. It’s kind of a challenge to differentiate between the claim name and the value if they aren’t aligned nicely. From there, make sure you’re using System.Security.Claims, and you can write yourself this foreach loop.
@foreach (var claim in ((ClaimsIdentity)User.Identity).Claims)
It’s not a big mind blower. This is a .cshtml document, so we can write HTML and mix in some inline C#. Using the ClaimsIdentity class, we can write a foreach loop for each claim in the identity of the currently logged in user. This assumes that the user isn’t logged in more than once (ie: Facebook and Twitter and Azure AD).
Then I’m making a new row in my table for each claim, and separate cells for the claim type, which is the name of the claim, and the claim value.
Nice and concise!