What is IdentityServer used for?

IdentityServer is an authentication server that implements OpenID Connect (OIDC) and OAuth 2.0 standards for ASP.NET Core. It’s designed to provide a common way to authenticate requests to all of your applications, whether they’re web, native, mobile, or API endpoints.

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Is IdentityServer paid?

The new Duende IdentityServer continues to be open source, but now has a dual license. This license allows it to be used for free for development, testing, and learning, free for non-commercial open source, and free for use in commercial settings if the entity or organization makes less than 1 million USD/year.

How do I authenticate web core API?

In this article

Create an app with API authorization support.
General description of the ASP.NET Core components of the app.
General description of the Angular app.
General description of the React app.
Require authorization on a new API.
Customize the API authentication handler.
Protect a client-side route (Angular)

Is IdentityServer4 free to use?

About IdentityServer4 IdentityServer is a free, open source OpenID Connect and OAuth 2.0 framework for ASP.NET Core.

What is OpenID and oauth2?

OAuth 2.0 is designed only for authorization, for granting access to data and features from one application to another. OpenID Connect (OIDC) is a thin layer that sits on top of OAuth 2.0 that adds login and profile information about the person who is logged in.

What is SAML and OpenID?

OpenID lacks user authorization data (such as permissions) and focuses primarily on identity assertion. SAML is an identity data exchange and is very feature-rich. Authentication is decentralized with OpenID. SAML uses assertions versus the OpenID and OAuth architecture of ID tokens.

Does IdentityServer4 work with .NET 5?

ASP.NET 5 is ASP.NET Core, (ASP.NET 5 is the deprecated moniker) and yes, IdentityServer4 only works with ASP.NET Core but you can use it on-top of full framework if you want. The other option is running IdentityServer3 on top of ASP.NET 4. x “aka” MVC 5 “aka” WebApi 2. x.

Can I use OAuth for authentication?

OAuth is not authentication. It’s an authorization protocol, or, better yet, a delegation protocol. It’s for this reason that identity protocols such as OpenID Connect exist and legacy protocols such as SAML use extension grants to link authentication and delegation.