Tag: Token

Start using Claims X-Ray with Azure AD

Dusting this thing off to share a quick tip for Single Sign-On work. For a while now I’ve been a proponent of using Claims X-Ray for interrogating/troubleshooting AD FS Claims. The tool is created by the AD FS / Azure AD team, and I have always found it to be a massive help. However, I had never tried using it with Azure AD, and it isn’t really presented as a tool that you would use with Azure AD. Ultimately there is no reason you can’t though, and I am finding it just as useful as I do with AD FS (if not more so). When I say “more so”, consider that many attributes are not easily discoverable in the interface, in PowerShell, or with Graph queries. Even attributes as important as user.onPremisesSamAccountName are quite hard to find unless you know the Graph syntax, so in some cases it may be simplest to add an unknown Claim to Claims X-Ray and interrogate away.

Here’s a view of my configuration. It will literally take two minutes (by which I mean 4 minutes and 24 seconds in the first empirical data to arrive) to deploy in your labs, and there is no reason not to target it at All Users, since it only unveils their own data.

Navigate to Enterprise Applications in Azure AD

Add a Non-Gallery Application, and name it “Claims X-Ray”, or whatever you like.

Configure Single Sign-On

Configure SAML

Extract the Redirect URL and Identifier from the Claims X-Ray site

Open the Basic SAML configuration options

Paste in the Identifier from Claims X-Ray as Identifier (Entity ID). Paste in the Redirect URL as Reply URL (Assertion Consumer Service URL)

When this is Saved successfully, do not choose the testing option yet, as the application hasn’t been assigned.

Add All Users (or whichever Group you would like to target). Personally, I see little reason to target this narrowly in a test environment.

Test the application from the My Apps portal.

That’s it! You will see a response like this in the default configuration.

And you can even view the Raw token data if you need to look at things like the token format, etc.

Hope this helps! In my view this should become a standard part of anyone’s Azure AD test environment.

Coordinating AD FS 2012 R2 token lifetimes to reduce logon prompts, enforce revocation and limit session duration over public networks

Back in February, I posted a question on the Geneva forum about Adjusting token lifetimes at the Web Application Proxy (WAP) for external access:

Does the Web Application Proxy or AD FS have any separate controls for adjusting token lifetimes to a different value via WAP than directly at AD FS? I can see there’s a session cookie for EdgeAccessCookie that WAP issues but this seems to be entirely undocumented at present. I’ve poked around in C:\Windows\ADFS\Config\microsoft.identityServer.proxyservice.exe.config (also undocumented as far as I can tell) but I’m not finding anything there either. We used to have some of these controls (sort of) with TMG/UAG. Are they totally gone now? With the AD FS Proxy this was less of an issue because it was only publishing AD FS but this is something that I’d hope to be able to control with a Reverse Proxy. Any ideas?

I didn’t get any replies, but after carrying out some tests of my own, I noticed the EdgeAccessCookie, and found a bit of information on TechNet:

After the user is authenticated, the AD FS server issues a security token, the ‘edge token’, containing the following information and redirects the HTTPS request back to the Web Application Proxy server:

  • The resource identifier that the user attempted to access.
  • The user’s identity as a user principal name (UPN).
  • The expiry of the access grant approval; that is, the user is granted access for a limited period of time, after which they are required to authenticate again.
  • Signature of the information in the edge token.

Web Application Proxy receives the redirected HTTPS request from the AD FS server with the edge token and validates and uses the token as follows:

  • Validates that the edge token signature is from the federation service that is configured in the Web Application Proxy configuration.
  • Validates that the token was issued for the correct application.
  • Validates that the token has not expired.
  • Uses the user identity when required; for example to obtain a Kerberos ticket if the backend server is configured to use Integrated Windows authentication.

If the edge token is valid, Web Application Proxy forwards the HTTPS request to the published web application using either HTTP or HTTPS.

This quickly became one of those things where there was insufficient documentation and limited project time, so I had to put this inquiry on hold. Then in July, I posted a question on the Application Proxy blog (a great resource), to see if this is something that they planned to document. The response that I got from Ian Parramore was unexpected and pleasing:

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Office 365 Single Sign Out with ISA or TMG as the ADFS Proxy

Over the last year I’ve spent a decent chunk of my time shaping and delivering Identity and Access Management workshops for Office 365 projects at Content and Code. This is generally underpinned by Active Directory Federation Services v2.0 (ADFS). In fact I don’t think we’ve done a single Office 365 project without it. Along the way I’ve become acquainted with many of the nuances of the sign on and sign out experiences as they differ across Office 365 services, client applications and different (valid) network perimeter technologies. In this post I will mainly focus on the security implications of publishing ADFS through ISA or TMG Reverse Proxies in the place of ADFS Proxy servers. In the majority of our engagements we’ve considered this option (potentially allowing our clients to consolidate infrastructure) since ISA, TMG or similar Reverse Proxies are commonly deployed. Yet we need to evaluate with full awareness of how ADFS operates without a Claims-aware Reverse Proxy such as the ADFS Proxy. This gets pretty technical, so I’m assuming some high-level familiarity with ADFS, Reverse Proxies and Office 365.

Contents

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