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Category Archives: OAuth
Flexible Access Token Validation in ASP.NET Core
The ASP.NET Core authentication system went through a couple of iterations, and is pretty good now. For API scenarios, the typical choice is the JwtBearer authentication handler, which can validate bearer JWT access tokens. There are other access token types … Continue reading
Posted in ASP.NET Core, OAuth
6 Comments
Refresh Tokens in IdentityServer4 v4
I already wrote about the hardening of refresh tokens in this post. I would recommend reading this first. The upcoming OAuth 2.1 spec is pretty clear about refresh token handling: If the client is confidential, the refresh token must be … Continue reading
Posted in IdentityServer, OAuth
3 Comments
Resource Access in IdentityServer4 v4 and going forward
In my last post I alluded to the tension between real-world token-based security architectures, the OAuth 2.0 scope model, JWT access tokens and the audience claim. We went through a couple of iterations in IdentityServer how we deal with those … Continue reading
Posted in IdentityServer, OAuth
4 Comments
The JWT Profile for OAuth 2.0 Access Tokens (and IdentityServer)
As part of creating our new Advanced OAuth training, I created a whole lecture on the evolution of access tokens and resource access. It’s fascinating – since the original OAuth 2.0 spec does not have any information about the token … Continue reading
Posted in IdentityServer, OAuth, OpenID Connect
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Updates on our Workshops
I am pleased to announce that we are now offering two workshops. I was mentioning that on Twitter already, and got a lot of questions. So I thought it would make sense to summarise them all in one place. You … Continue reading
Posted in OAuth, OpenID Connect
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Automatic Token Management for ASP.NET Core and Worker Services 1.0
After a pretty long preview period, I am happy to announce that IdentityModel.AspNetCore 1.0 is now on Nuget. This library solves a problem that we have with every single OIDC/OAuth client we are creating: token management. Requesting and using a … Continue reading
Posted in .NET Security, ASP.NET Core, IdentityServer, OAuth, OpenID Connect
1 Comment
Major Update to IdentityModel.OidcClient
I just pushed Preview 3 of the 4.0 version of IdentityModel.OidcClient – this includes some major updates (that you might or might not have asked for): Removal of OpenID Connect Hybrid Flow. The codebase does Authorization Code Flow + PKCE … Continue reading
Posted in IdentityModel, OAuth, OpenID Connect
2 Comments
SPAs are dead!?
clickbait isn’t it? But this was Brock’s immediate reaction when we saw (and I recommend you read this first): Full Third-Party Cookie Blocking and More What this basically means is, that browser are getting more and more strict with how … Continue reading
Posted in OAuth, OpenID Connect
27 Comments
Mutual TLS and Proof-of-Possession Tokens: Summary
This is the last part of my PoP and Mutual TLS post series. Part 1 covered some history and motivation, and part 2 looked at various server setups. Part 3 was supposed to be a walk-through guide on how to … Continue reading
Posted in ASP.NET Core, IdentityServer, OAuth, OpenID Connect
4 Comments
Mutual TLS and Proof-of-Possession Access Tokens – Part 1: Setup
2020 is the year where I want proof-of-possession tokens to become reality. Mutual TLS seems to be the only feasible way to do that today. So here’s another post about it…. This is a two-part post. In this post we … Continue reading
Posted in ASP.NET Core, IdentityServer, OAuth, OpenID Connect
8 Comments
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