The local server, therefore, needs to be able to validate the token without access to the Azure authentication service. Therefore, they would like a user to be able to authenticate at some point in the morning when the connection is up and have a token that will be valid throughout that user’s work shift. This particular scenario is interesting, though, because the connection between the customer’s location (where the server and clients reside) and the internet is not reliable. Rather than store user names and hashed passwords locally, the customer prefers to use a common authentication micro-service which is hosted in Azure and used in many scenarios beyond just this specific one. The customer has a local server with business information which will need to be accessed and updated periodically by client devices. Offline Token Validation Considerationsįirst, here’s a quick diagram of the desired architecture.
In subsequent posts, I’ll show how those same tokens can be used for authentication and authorization (even without access to the authentication server or the identity data store).
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In this article, I offer a quick look at how to issue JWT bearer tokens in ASP.NET Core. Because some of their customers don’t have reliable internet connections, they also wanted to be able to validate the tokens without having to communicate with the issuing server. I recently worked with a customer who was interested in using JWT bearer tokens for authentication in mobile apps that worked with an ASP.NET Core back-end. One authentication scenario that requires a little bit more work, though, is to authenticate via bearer tokens. It is also straightforward to support authentication by external providers using the Google, Facebook, or Twitter ASP.NET Core authentication packages. This is a guest post from Mike Rousos IntroductionĪSP.NET Core Identity automatically supports cookie authentication.