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Pass user’s identity and authorization from a client application to a web API to another web API using OAuth 2.0 On-Behalf-Of flow.
Published October 20, 2019
in Angular
, ASP.NET core
, Azure
, Azure Active Directory
, OAuth2
, OpenID Connect
, security
- 7 Comments
A few months ago, I gave an overview of the libraries I use to implement OpenID Connect implicit flow in an angular app, and On-Behalf-Of (OBO) flow in ASP.NET core backend APIs. You can checkout this post for more info. In that post, I talk about the security flow from the angular app to the downstream APIs. The angular app communicates only with a single backend API which acts as a gateway that forwards the requests from to other downstream APIs.
In this post, I go over the details of obtaining an access token via the OBO flow to call protected endpoints from a web API (which I refer to as the gateway in this post) to another web API .