Given an Identity Server 4, can we implement a Single SignOn being used by different applications with a single user authentication server?
If so, how can we do that? Any reference material available for the same?
In fact, there is nothing special you have to do to enable single sign-on. It's available by default, but not for all scenarios.
In order to make SSO work there is only one rule:
The user has to login on the IdentityServer website, because that's where the SSO cookie has to be placed.
SSO is not available for grant types that do not require the user to login on the IdentityServer website.
How it works:
A user visits webapp1, hits the login button and is redirected to the IdentityServer website in order to login. IdentityServer will scan for the SSO cookie but will not find it since this is the first time and the user isn't authenticated yet.
After succesful login, the SSO cookie is stored (on the IdentityServer website) and an authenticated user is returned to webapp1.
The user then visits webapp2. As long as the user is not required to authenticate the user will be an anonymous visitor.
Authentication is required when the user clicks on the login button or visits a secured page (e.g. secured by the [Authorize] attribute). That triggers the authentication flow which redirects the user to the IdentityServer website.
Again IdentityServer will scan for the SSO cookie, but this time it's found. Being already authenticated, the user isn't required to login again but is instead returned to the website as authenticated user.
Please note that the client can overrule the SSO cookie by setting the prompt=login parameter.
Also note that cookies are not cross-browser. Visiting webapp2 using a different browser will require the user to login again because the SSO cookie isn't available for this browser.
Yes you can, that is what IdentityServer4 is used for (SSO & Authentication).
There is documentation and some samples.
Related
I have keycloak version 20 installed, and api request to authenticate with username and password via REST API. I want to add remember_me to the request body, so I can extend the users refresh token (if the user wants it). Is that possible? I don't want to extend the refresh token lifespan for all sessions.
The API call is to the URI
/realms/{realm}/protocol/openid-connect/token
I also enabled the remember me for the realm, and it is available if I authenticate in the browser.
I have keycloak version 20 installed, and api request to authenticate
with username and password via REST API. I want to add remember_me to the request body, so I can extend the users refresh token (if the user wants it). Is that possible?
I am afraid this is not possible with Direct Access Grant Flow
From the Keycloak documentation section about the Remember Me functionality:
A logged-in user closing their browser destroys their session, and
that user must log in again. You can set Keycloak to keep the user’s
login session open if that user clicks the Remember Me checkbox upon
login. This action turns the login cookie from a session-only cookie
to a persistence cookie.
In Keycloak this feature relies on the browser cookies to work. For example, if you login with a user in one browser and then try to access the same account in another browser you are forced to authenticate the user again. It only works in the same browser (if cookies are enabled) because it was there where the cookie was originally created. Consequently, out-of-the-box, I do not see how this would work with the Direct Access Grant flow.
A React SPA sends registration details to a backend (including username and password). Besides other things, the backend creates a keycloak user via the REST admin API.
The user then still needs to go to the keycloak login page for authentication. Is it possible to skip this step and automatically log-in the user on registration via API?
I thought if maybe the backend can obtain a token and send it to the SPA. But I do not know how to initialize keycloak-js in this scenario.
You can register the user and, after a successful registration, call the login endpoint with the same credentials in order to receive the access token.
Update:
My understanding (which may be incorrect) of Keycloak is that once an User has logged in and is authenticated, the access-token/JWT is then stored as a cookie in the browser (under the default name 'kc-access').
Is it possible to configure keycloak to instead store the access-token directly as a Bearer Token instead of in a cookie?
Asking as I wish to use Keycloak to secure a web application, however most resources I have read on Authentication usually talk about access-tokens stored as Bearer Tokens, rather than as cookies.
From the Keycloak documentation, I cannot see any mention of options to store the access-token as a Cookie OR Bearer Token - Am I misunderstanding how Keycloak is meant to be used for providing authentication for web applications?
Keycloak is used as a Single-Sign-On (SSO) provider. As such, it is designed to be used with multiple components. It is designed to keep a session open on the user's browser with a cookie. This session is private to Keycloak. The authentication flow then provides your application with a token that authenticates the user. Your application will then usually set it's own cookie to establish a session for the user and avoid having them login on each page.
When you login with Keycloak, it keeps a session open with your browser by storing a cookie there. The length of this session and other factors are configurable in your realm settings.
When you use Keycloak to login to another app, such as your web app, you use OpenID Connect (or SAML) as a protocol to authenticate the user with a flow similar to the following:
The user's browser is redirected from your application to Keycloak,
which checks whether the user already has a session, requires them to login (and create a session) if they are not yet logged in on keycloak
Redirects the user back to your web app with a short lived code
Your application connects to keycloak to exchange the code against a token.
Your application reads the token to identify the user and possibly stores it if it needs to access third party resources as the user using OAuth2.
Your application creates a session cookie to keep the user authenticated.
Most of these steps should be handled by a library. Keycloak provides many OpenID adapters for popular frameworks and servers, such as Apache and Tomcat.
The session cookies can be any string so long as they are unique and private between the browser and your application. They identify the user from the browser across requests. The bearer token is generally used to authenticate or to connect to stateless services such as APIs.
You can find documentation about the OpenID protocol here: https://openid.net/connect/faq/ .
I will try to keep the question as clear and direct as possible.
Social authentication (Facebook) configured with Okta with redirect URI as URL to my custom webapp. This custom webapp relies on Okta for authentication.
User visits my custom webapp (unauthenticated) and clicks on the social authentication URL to login to my custom webapp.
User follows the normal flow, gets authenticated by facebook and thereby by Okta (as per usual flow) and is then redirected by Okta back to the custom webapp.
The entire flow is successful and the user can see an Okta session cookie set in their browser.
Custom webapp now needs to show the user their own profile by making an Okta API call.
Problem: How can my custom webapp identify who just logged in so that they can fetch their Okta profile using API?
I am aware that Okta knows who just logged in due to claims that facebook sends to the OAuth client (Okta), but how will my app know the identity of the user who logged in?
Thanks,
Jatin
It depends on the OAuth2 flow you've chosen for your app, but the end state is getting an id_token from Okta which contains claims about the user that just logged in.
If you've set response_type=code in your social auth url (/authorize), after Step 4 you'll get a code query param in the redirect that you can then exchange for the id_token using the /token endpoint.
Or, if you've set response_type=id_token, you should already have the id_token in the redirect - you just need to validate/decode it (more info here).
I have four custom apps (that are SPs), using Auth0 or OneLogin as my IdP. In Auth0 I create a connector for each application. When I login to one application and then open the other application, I get redirected to Auth0 to login again.
Is it possible to log the user into my IdP (or Auth0/OneLogin) automatically on that second app without having to click the login button on Auth0, since they've already authenticated with Auth0?
There is an unfortunate need to embed the second app into the first app and it's a poor UX to have the user login to the first app and then login again in the iFrame.
Auth0 Dev here, Yes this is supported Out of the box in Auth0, for this to work you'd have to turn Use Auth0 as IdP "ON" in your Client. When doing this Auth0 will then remember the client for 10 hours upto 3 days if the client is active.
The flow in your scenario will be
User logs in to any of the application.
User visits the other application.
The other application sees no session.
The other application redirects to /authorize endpoint.
Auth0 notices the session and redirects it back to your application immediately.
This is further detailed and explained at https://auth0.com/docs/sso
SSO is not having to re-enter credentials again but you only get SSO once you redirect to the IDP and you authenticate under the hood i.e. seamlessly.
So you still have to do something to trigger the redirect.
You could programmatically redirect to a dummy page that requires authentication that then redirects via your client stack e.g. OWIN OIDC.
Also, there is no standard for the cookies so you don't get SSO across multiple IDP unless they are federated together.
So if no federation and you login to Auth0, you will still have to login to OneLogin.