Creating Custom OpenId Provider for Oauth2 Spring Boot

Question

I have used Oauth2 framework for authorization and access control for protecting my spring boot microservice api's. Oauth2 framework is working fine but now my Client wants a dedicated OpenId Provider for authentication purpose on top of Oauth2 framework. I have done some round of searching across Google but couldn't find much resources for implementing Own OpenId Provider for Oauth2. I have gone through many blogs and could understood that OpenId is basically used when we want to delegate the authentication from Oauth2. OpenId is created on top of Oauth2 but couldn't find much resource for activating or implementing it.

Can anyone please help me on this

My complete source code which I have done using Oauth2 with Spring Framework is as given below

oauth2-spring

Answer 1

According to "OAuth 2.0 Features Matrix" in spring-projects/spring-security, Spring Framework is not a good starting point for OpenID Connect. None of the new projects (Spring Security, Spring Cloud Security and Spring Boot OAuth2) supports Authorization Server. On the other hand, the old project (Spring Security OAuth) has architectural problems that prevent OpenID Connect support.

The website of OpenID Connect says "OpenID Connect 1.0 is a simple identity layer on top of the OAuth 2.0 protocol." This sentence may give an impression that OpenID Connect can be implemented on top of an existing OAuth 2.0 implementation step by step. However, it's not true. One evidence is spring-security-oauth Issue 619 where you see the project has given up supporting OpenID Connect. If interested, see "5. Response Type" in "Full-Scratch Implementor of OAuth and OpenID Connect Talks About Findings" for further details.

There exist many implementations that support OpenID Connect. Why don't you check the list of certified implementations?

Update (November 14, 2019):

The Spring Security team has decided to no longer provide support for authorization servers. See their announce for details.