OIDC (OpenID Connect) Structure

-

 

OIDC (OpenID Connect) Structure


OIDC


Simple Identity Layer on top of the OAuth 2.0 Protocol. 

OpenID Connect can be thought of as an identity layer added on top of the OAuth 2.0 protocol to enable the OAuth 2.0 protocol to be used for Authentication.

OpenID Connect contains a meta-data document (.well-known/openid-configuration) that defines the information required to login through an application. (Which urls should be used, which scopes it contains, etc.)

 

If you want to view the relevant metadata document as an example, you can access the Microsoft's OIDC metadata document by navigating to https://login.microsoftonline.com/common/v2.0/.well-known/openid-configuration.

 

As in OAuth 2.0, transactions are performed using flows in OIDC. As an example, let's examine the endpoints of Authorization Code Flow for OIDC as in OAuth 2.0.

Example: OAuth 2.0 - Authorization Code Flow


We can examine this flow in 6 steps:

1-) Authentication Request

Authentication Request

  • If we examine the related endpoint, we can see that a value called openid is passed in the scope section. We can actually think of this as the equivalent of the identity layer concept we used when defining OIDC. With this scope added to the OAuth 2.0 protocol, Authorization Server now handles the relevant request within the scope of OIDC.

2-) Authentication Response

Authentication Response

  • Here, as in OAuth 2.0, a GET request is sent to the callback-url (redirect-uri) with the Authorization Code. In this way, the Client becomes aware of the relevant authorization code.

3-) Token Request

Token Request

  • Then, the relevant Client requests a token from the Authorization Server with the "authorization_code" it has obtained. (Token exchange => Authorization Code ↔ Access Token)

4-) Token Response

Token Response

If we examine the response we can see the "id_token" section.

  • ID_Token: It can be thought of as an identity card. Contains information about the end user. It is in JWT format. It can be thought of as the add-on that OIDC brings to OAuth 2.0. In this way, the Authentication process can happen.

ID_Token

5-) UserInfo Request - Obtaining End User's Information

UserInfo Request

  • The UserInfo endpoint returns information about the logged in user (name, surname, etc.). When the client needs the information of the relevant user, he can obtain the necessary information by using this endpoint. (Note that the relevant user is now authenticated and a request is made to the endpoint using the Bearer Authorization.)

6-) UserInfo Response

UserInfo Response

  • If the request that we made in the previous step is successful, the user's information receives.

  • As another method, the user's relevant information can be accessed by decoding the previously generated "Id_Token" value

Comments

Post a Comment

Popular posts from this blog

Email Sending through O365 using OAuth Protocol

-
  Microsoft Office365 EWS servers have been extended to support authorization via the industry-standard OAuth 2.0 protocol. Using OAUTH protocol, user can do authentication by Microsoft Web OAuth instead of inputting user and password directly in application Microsoft / Office 365 OAuth + EWS We can use the OAuth authentication service provided by Azure Active Directory to enable our application to connect with IMAP, POP or SMTP protocols to access Exchange Online in Office 365. To use OAuth with our application we need to register application on Azure Active directory and other steps also we need to do to get the access token back. Below are the steps   To use Microsoft/Office365 OAUTH in your application, you must create an application in  https://portal.azure.com . Sign into the Azure portal using either a work or school account or a personal Microsoft account. If your account gives you access to more than one tenant, select your account in the top ...
Read more

IoT Technology

-
Image
IoT technology The Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines.  IoT is a network of sensors where data is exchanged, using different connectivity protocols, with systems. This set up can be leveraged to create a new business application or to enhance an existing process. The exchange of the data can be bi-directional between sensors and systems Examples of sensors can be temperature sensors, motion sensors, flow meters, heart meter monitors, biometric devices, smoke detectors, & etc Examples of connectivity can be wifi, radio, GPRS, GSM, LAN, WAN, & etc. Examples of systems can be a remote health monitoring applications, SCADA applications, etc Look at next slide about the complete flow of IoT process Examples A doctor in US would like to monitor the heart rate and ECG of a patient in Hyderabad. This is done with the patient having sensors attached to him that collect the ECG data and the hea...
Read more

What is reverse proxy?

-
Image
  What is a reverse proxy? A reverse proxy is a server that sits in front of web servers and forwards client (e.g. web browser) requests to those web servers. Reverse proxies are typically implemented to help increase  security ,  performance , and reliability . In order to better understand how a reverse proxy works and the benefits it can provide, let’s first define what a proxy server is. What’s a proxy server? A forward proxy, often called a proxy, proxy server, or web proxy, is a server that sits in front of a group of client machines. When those computers make requests to sites and services on the Internet, the proxy server intercepts those requests and then communicates with web servers on behalf of those clients, like a middleman. For example, let’s name 3 computers involved in a typical forward proxy communication: A: This is a user’s home computer B: This is a forward proxy server C: This is a website’s origin server (where the website data is stored) In a stand...
Read more