I'm part of a small team as a nodeJS dev and I've been tasked into researching how this can be accomplished. I'm fairly new to OAuth and authentication so please bear with me.
Currently we have a next.js webapp that uses NextAuth for authentication with the user store in DynamoDB. What we want to do is provide an Oauth2 flow so a user can consent to a 3rd party service having access to their profile information via an endpoint. In this case we are the resource server, the 3rd party is the "client" and our user is the resource owner.
The piece of the puzzle I'm trying to put together is how does Auth0 work with NextAuth in this scenario? I want Auth0 to check if the user is logged in (otherwise prompting them to do so) via NextAuth, and for NextAuth to say "this is fine" and then for Auth0 to issue a token to the 3rd party (concluding a "normal" OAuth flow). Is this were SAML comes into play? I see there's a software package called SAML Jackson (lol) and there's a Next-auth integration for it.
Most examples I see usually work the other way around, with Auth0 as the identity provider, and what we're doing may be unique. Sorry if this question comes across as abstract but that's how it exists in my mind currently. Any help understanding this would be greatly appreciated.
You can connect your user store to Auth0 as a custom database connection. And then create an application inside Auth0 and enable the DB connection for the app. This way Auth0 acts as the Authorization server for your client app.
NextAuth.js is just an authentication library that supports the OAuth2.0/OpenID protocols. The role of NextAuth is simply to initiate the authentication flow, take the user to the Identity Provider (in this case Auth0 backed by a custom user store) and finally process the authorization response from Auth0. The authorization response (code) is received at the application end and then exchanged for access_token and user profile (all handled by NextAuth.js).
And for your query on SAML, it's a standard for exchanging identity information between two parties an Identity Provider (IdP) and a service provider (SP). The same is achieved by its more modern counterparts OAuth2.0/OpenID Connect. Typically third-party apps which are deployed in an enterprise setting use SAML to integrate with on-premise Identity Management Systems like ActiveDirectory. You can read more about SAML on https://boxyhq.com/blog/understanding-saml-sso-the-basics-from-the-user-side.
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We have in my organization an existing ASP.NET web application built in a SAAS model that our customers (users from different organizations) login through username/password authentication method. Users' credentials are hashed and stored in our database. We are currently working on adding a SSO feature to our application that would allow end-users from certain organizations to login with SSO using their own Identity Provider (Azure AD, Google, Okta, etc.) to perform the user authentication. We are using the OpenId Connect protocol to establish the SSO connection with IdP, and more specifically the Open Web Interface for .NET (OWIN) middleware. We have implemented the following:
Our SAAS application offers customers the ability to opt for SSO authentication through a setting. End-users from these organizations will be authenticating to our application via SSO AND using their own IdP
Our application supports SSO connection from different IdPs (Azure AD, Google, Okta, etc.)
Our application stores SSO connection settings for each customer that opt for SSO authentication (Client Id, Authority, Secret, etc.). All these settings are configurable in our application, they're available upon registration of the application on IdP side.
My question is about the app registration. I know that in order for our application to communicate with IdP and initiate SSO authentication it needs to be registered on related IdP, so that it can create a trust relationship. I am wondering which party should be responsible of the app registration:
My organization owner of the SAAS application? or
Our customers willing to use SSO authentication method?
With option 1, my organization will have to have an "account" on each of the IdPs our customers use for authentication (I feel this is not ideal for us), register our application and have a mechanism to invite our customers IdP to connect to the registered app.
I feel like option 2 would be the best approach for us as we won't have to deal with app registration, as customers will be responsible of registering the application on their own IdP. From my organization end we will just need to deal with SSO connection settings (Client Id, and other...) which will be provided to us by our customers upon app registration. I wanted to check if this is a common situation that some have already experienced, and what would be the best/recommended approach to go with. Thanks.
I am expecting app registration to be performed on customers side.
I would usually recommend that your internal services and APIs only need to trust tokens from one Identity Provider, and in your case you have one openid connect provider inhouse. That then supports your users to authenticate to and optionally authenticate using an external provider, like how the image below tries to show:
In my experience, having your applications trust and handle tokens from multiple sources will be a pain, as many of the external tokens might look slightly different.
How can I authenticate my mobile app(flutter) against social providers while using a flow provided by an IdentityServer4 system?
I'm trying to build a mobile app which will authenticate a user via Azure AD b2c. This question will be valid for any provider of an IdentityServer4 service though. For mobile apps, everything I read suggests using the Resource Owner Password Credentials(ROPC) flow. My understanding is that ROPC does not allow for social providers to be authenticated with. Is there an alternative flow to use specifically for social providers authentication? Is my understanding of ROPC wrong? I know mobile apps can authenticate with social providers, I've seen enough do it.
If you want to authenticate social providers and the users of mobile application, you could use auth code flow via Azure AD B2C. You can use it for authentication and authorization in most application types, including web applications and natively installed applications.
About Resource Owner Password Credentials (ROPC) flow, more secure alternatives are available and recommended. This flow requires a very high degree of trust in the application, and carries risks which are not present in other flows. You should only use this flow when other more secure flows can't be used. It is not recommended.
Update:
How does the auth code flow work for mobile authentication when it needs a redirect uri to send the resulting token to? This seems similar to the implicit flow for websites.
They are similar, but they apply different application types. You could learn more about the flow(auth code flow, implact flow). The docs are about AzureAD, but the processes are the same as B2C.
The protocol diagram of auth code flow is this:
The protocol diagram of implicit flow is this:
I'm googling since long and i'm bit confused now should i create Custom iDP or Authentication provider in Keycloak.
Below is my requirements.
I have multiple clients and each client having login API which also returns JWT token on successful login so what business needs is that when user try to login i want keycloack to consume client API to Authenticate User and once user successfully authenticated by Client API Keycloack should generate token for further operations.
One more problem is can i use same token return from client as Keycloack token because there are some apis on client side which decode token and use some info from token.
Please suggest and i'm bit stressed to looking for different solution and couldn't help. I will be grateful if you can share sample code with it.
What do you mean by "I have multiple clients and each client having login API" (does that mean different endpoints secured by different realms?? I supose that's not what you want).
What you mention here:
"what business needs is that when user try to login i want keycloack to consume client API to Authenticate User and once user successfully authenticated by Client API Keycloack should generate token for further operations."
that is indeed the standard behaviour of Keycloak, why do you need a custom Authentication (user federated Authentication/ identity Provider)? You haven't made clear from the description of your problem, why do you need a custom Identity Provider SPI /custom Authentication federation? If you really need an Authentication SPI, please read chapter 8 from here:
https://www.keycloak.org/docs/latest/server_development/index.html#_auth_spi
that's the best documentation on that topic. Are you authenticating against a custom Auth service of your company that doesn't support openid connect? If not, then you don't need a custom Authentication SPI.
regarding:
"can i use same token return from client as Keycloack token because there are some apis on client side which decode token and use some info from token."
I don't know exactly what you mean there, but depending on your client adapter there are slight variations on the way you get/extract a bearer token & secure your endpoints in general. Plase read chapter 3.1 from here: https://www.keycloak.org/docs/latest/securing_apps/index.html#_client_registration
There you'll find base implementations/suggestions for the different client adapters, or at least should move you forward in your search.
Hope it helps.
We have a working REST API which uses OAuth2 password grant (for access through our own Web UI) and client credentials grant (for scripted access), and may allow other grants in the future.
Recently a request came up to support 3rd party Single Sign On through OpenId Connect (so we can support identity providers such as Google and LinkedIn, but also some of our client's internal SSO systems that support OpenId Connect.
I'm trying to understand how to integrate the OpenId Connect flow into our existing authentication, authorization and identity management architecture.
One important thing is our system still needs to control authorization and access token grants and expiry. We just want to allow 3rd party authentication and identity management as an option, from a selected (but flexible) list of providers. Basically the way I see it, OpenId Connect can, optionally, replace the password grant for some users.
Can anyone recommend a guide or a reference implementation for such setup? Am I trying to do something that doesn't make sense?
EDIT: By "existing architecture" I mean our own existing user database, which supports email / password based authentication (that using OAuth2 password grant). We want to maintain this DB / authentication flow but also allow 3rd party OpenId Connect based authentication.
Our company maintains a Web App composed of a front-end and a back-end in (Node.js), and we support the standard username/password login authentication. A couple of our partners have requested we support SAML SSO, so their end-users can access our web app through a link on their respective portals without the need to login again.
Question: Do we need to turn our app into a full-fledged service provider (SP) by implementing a SAML sdk/library in our front-end and back-end?
Or is it possible to use a 3rd party authentication provider like Okta to handle the SAML nitty-gritty behind the scenes and then redirect the end user to our app, with possibly a token (JWT?) so we can retrieve the user info from Okta?
I've read everything I could find on Okta's site, and here, and couldn't find a definitive answer, either yes it's possible (with example) or no you can't do that.
Like you already mentioned in your question, there are 2 possible ways to do it.
Update your application to support SAML login flow with your app as SP, in which case you will not need to use any 3rd party auth provider
If you don't want to get into the SAML nitty-gritty, you can use a 3rd party provider like Okta as an intermediary that will consume the SAML responses from the IdP (used by your external customers) and then convert that assertion into an Open ID token (JWT). In this case, Okta will act as an IdP (Authorization server) to your web app and generate ID tokens.
Your app will then need to implement the Open ID connect login flow.
You can refer to http://developer.okta.com/code/javascript/okta_sign-in_widget_ref for this.