We have several apps Deployed on Google Apps Marketplace using OAuth 1.0 protocol. According expiration OAuth 1.0 in Google Platform we are trying to migrate all the apps to new OAuth version but we are facing some difficulties regarding background request to Google Admin SDK Directory API.
In our apps we need to request for Domain user accounts, groups and other stuff related Email Domain structure. Until OAuth 1.0 we have been doing this with 2-LO (Two-Legge OAuth) so basically once Admin gave us access we can impersonate request for domain using this mechanism.
After reading all Google Documentation about Google API, Oauth Mechanisms and stuff, and after trying some code test hypothesis too, we haven't figured out yet how can we managed the same concept with OAuth 2 because of the following:
Using Web Server Oauth 2 Strategy simply will not work because in that scenario we would be getting a Domain user Access to Admin SDK. If we keep their access/refresh token pair to later querying Admin SDK and the user is deleted because Domain change it Admin we will be disconnected from flow.
I supposed in that case the best choice was Service Account strategy. The problem with this scenario is the user has to manually configure access to the App in their Admin Console according to the Google's document domain-wide delegation authority (https://developers.google.com/+/domains/authentication/delegation#create_the_service_account_and_its_credentials). This is really awkward for us since we were managing all application installation interactively and we don't want to remove User Experience facilities.
Finally, my questions are:
Is there any way to do domain-delegation authority with OAuth 2 with no manual user configuration, full interactively?
Is there any way to do this without needing user email, which in fact is one of the parameters in Service Account Oauth2 Strategy?
Must we keep 2-LO Authentication for this scenario and do OAuth 2 only for installation Google Marketplace part?
Any comments or guide will be wellcome.
Best,
Certainly - in the latest update to the Google Apps Marketplace, the act of installing an App means the admin doesn't need to do an additional manual step.
You need a way to impersonate a user in a Service Account. Depending on how you implement your application, you might need to utilize the Directory API.
OAuth1 is going away eventually so I recommend you use OAuth2 throughout to simplify your code complexity.
Related
I'm building a web app using Clojure and ClojureScript and I need it to have authentication based on a white-list of organization. For example, let's say I've added University1.edu to my white-list, and when a student from that university wants to login to my web app, they would be redirected to their own universities login system. After that I would just a confirmation of whether or not they successfully logged in there and maybe create a session, cookies, or or something for them.
Is that possible and if so, how can I implement that?
Some common ways to implement this authentication schemes are OAuth2 and OpenID, which are commonly used in websites were you can log in with your social / Twitter / Facebook / Google account.
Using OAuth for instance, you register your website in some developer portal (depending on the service that you'll use to authenticate) and obtain a token that that you'll use during the login flow and after logging on their portal, users are redirected back to your site.
In order for this to work, every organization (eg. University1) needs to be a provider of this authentication scheme, so that's something you'll need to research.
In Clojure there is a couple of options: the buddy library seems to be a popular choice, but you could also use some Java libraries through interop.
So I want to have single sign in, in all the products using a auth server but that's not only for employees, keycloak should be used to that like auth0?
There are also some advantages to Keycloak:
Keycloak is also available with support if you buy JBoss EAP (see http://www.keycloak.org/support.html). This might be cheaper than the enterprise version of Auth0. If you want to use custom DB, you need enterprise version of Auth0 anyway.
Keycloak has features which are not available in Auth0:
Fine-grained permissions and role-based access control (RBAC) and attribute-based access control (ABAC) configurable via web admin console or custom code or you can write yuour own Java and JavaScript policies. This can be also implemented in Auth0 via user rules (custom JavaScript) or Authorization plugin(no code, less possibilities). In Keycloak you can do more without code (there are more types of security policies available out of the box e.g. based on role, groups, current time, an origin of the request) and there is a good support for custom developed access control modules. Here some more detailed research would be interesting to compare them.
Keycloak also offers a policy enforcer component - which you can connect to from your backend and verify whether the access token is sufficient to access a given resource. It works best with Java Web servers, or you can just deploy an extra Java Server with Keycloak adapter which will work as a gatekeeper and decide which request go through and which are blocked. All this happens based on the rules which you can configure via Keycloak web interface. I am not sure such policy enforcer is included in Auth0. On top of that, Keycloak can tell your client application which permissions you need when you want to access a given resource so you do not need to code this in your client. The workflow can be:
Client application wants to access resource R.
Client application asks Keycloak policy enforcer which permission it needs to access resource R.
Kecloak policy enforcer tells the client application which permission P it needs.
The client application requests an access token with permission P from Keycloak.
The client makes a request to the resource server with the access token containing permission P attached.
Policy enforcer which guards the resource server can ask Keycloak whether permission P is enough to access resource R.
When Keycloak approves, the resource can be accessed.
Thus, more can be centralized and configured in Keycloak. With this workflow, your client and resource server can outsource more security logic and code to Keycloak. In Auth0 you probably need to implement steps 2,3,6 on your own.
Both Auth0 and Keycloak should be able to achieve your goal - assuming you want only social (facebook, google etc), and /or username & password authentication?
Auth0 is the less risky option, keycloak is good for non-commercial & where you can afford production outages without a global 24x7 support team. Here a few other reasons why I'd recommend Auth0 - the documentation is world class, they have quickstart samples so you can get up and running in minutes, and easy access to more advanced options - passwordless, authentication, MFA, anomaly detection, x9's reliability, rate-limiting, an extensive management api, extensions for everything eg exporting logs to log aggregator, and so on. Anyhow, good luck with your project, and obviously what suits best may simply be down to your own project requirements.
Should add, if you are doing mobile, then Auth0 put a lot of effort into adding the necessary specialised security flows to target mobile (native / hybrid) apps. For instance, PKCE usage when using /authorize endpoint. Please bear that in mind, as not certain how keycloak has been implemented to handle this - alot of IDMs still do this incorrectly today.
I've been reading a lot lately about WEB API authentication mechanisms and I'm a little bit confused regarding how to implement my Web API authentication mechanism, I'm thinking on using Token based authentication but I'm not sure if it is the right choice.
Basically my Web API will manage all the operations needed and it will store the users of my website as well the API users(in case they have to be separated).
I want to support the following
User can register on my website and apps using their G+ or Facebook account or an already created username from my service, as well they will be to login using their social account.
If the user is not logged in they won't be able to post Items but they will be able to see the Items, think something like Craiglist.
Let's say the user is a developer and they want to post the items through some software they created instead of going through the website and posting one item at a time, how do I allow this?
Now, my questions are: 1) When a user registers on my website, do I have to create a (public key/ secret key) for it subsequent access token , so I can use my API from the website as the user checking if they have access to certain endpoints?
2) Do I have to assign a (public key / secret key) for my website so I can consume the API when the user is not logged in?
3) The same as above for mobile apps
4) How do I allow users to (sign up / sign in) using G+ or Facebook?, if they log in using any social network how am I going to secure my api?
Please, any answer will be really appreciated.
Thanks
For ASP.NET Web API 2, I would recommend you to use the default Owin OAuth2 authentication. It's a standard form of authentication well documented enough. If you do not have enough knowledge about OAuth2, read the RFC.
With Web API 2, ASP.NET moved to a new security model, called ASP.NET Identity. There is this really good video that explains the basics. The point is that starts from scratch, ignoring traditional basic, forms, or windows authentication.
A lot of learning material is on the ASP.NET website.
For local, individual accounts (questions #1, #2, and #3), look through this tutorial - here basically your own server will act as an OAuth authorization server, and the Owin OAuth2 implementation will take care of generating access token and authenticating them. Since you'll be using the OAuth 2 standard, it will be basically the same for mobile as well.
For external accounts (question #4), read through this tutorial. There are official libraries for third-party authentication for the major providers:
Microsoft.Owin.Security.Facebook
Microsoft.Owin.Security.Google
Microsoft.Owin.Security.Twitter
Microsoft.Owin.Security.MicrosoftAccount
It would helpful to also learn more and understand the new OWIN specification, that describes how web apps need to created for the .NET framework, and the Katana project (Microsoft's OWIN implementation).
Follow this tutorial for most of your requirements http://bitoftech.net/2015/01/21/asp-net-identity-2-with-asp-net-web-api-2-accounts-management/ Logging in via facebook/G+ MVC already has the helpers commented out. You would get the credentials by setting up key's via the third party apps and then store the identity.
I'm trying to figure out what I need to do in order to achieve seamless SSO sign up.
When an administrator of a domain installs my google app, all of the users on his/her domain, should be able to sign-in through SSO without seeing any confirmation prompts. I'm looking into documentation on how to set this up:
Instead of displaying a confirmation page, your application should
match the value of the openid.realm parameter in the OpenID request
against the value declared in the application's manifest.
Is there an example of this? Also, I think Google stopped using XML manifest files once they switched from OpendID to OAuth 2.0. If so, how does this whitelist process work with OAuth 2.0?
Should I be utilizing Google Admin SDK?
Since google is moving away from OpenId, white listing instructions are obsolete. Found a blog post about Domain-wide delegation with Oauth 2.0. Google recommends the following:
the recommended authorization mechanism is now to use OAuth 2.0 and
service accounts. Google Apps domain administrators can delegate domain-wide authority to the service account’s credentials for a set of APIs. This results in allowing the application, by using the service account’s credentials, to act on behalf of the Google Apps domain’s users.
instructions on how to set up domain wide delegation - https://developers.google.com/drive/web/delegation
you can find detailed step to achieve seamless SSO sign up at the following url
http://david-codes.blogspot.com/2014/07/how-to-provide-seamless-single-sign-on.html
I have a large customer base and would like to migrate them from using OAuth1 2LO to OAuth2 Domain-Wide Delegation and
1) Would like to know if it's possible.
2) If possible, can it be done without user intervention/impact.
For reference, I am looking at/following the OAuth1 migration doc (https://developers.google.com/accounts/docs/OAuth_ref#migration):
According to the delegation docs, we'd want to create a "service account", but the OAuth1 -> OAuth2 migration guide (https://developers.google.com/accounts/docs/OAuth_ref#migration)
Your application must have an OAuth 2.0 Client ID. You get this Client ID by registering the application as an installed app or a web app in the Google Cloud Console.
1) Does this also work for "service accounts"?
If the migration does work for service accounts, there appear to be manual steps on the part of the admin for setting up delegation (found here: https://developers.google.com/drive/delegation)
The service account that you created now needs to be granted access to the Google Apps domain’s user data that you want to access. The following tasks have to be performed by an administrator of the Google Apps domain:...
2) Does this mean that we will require our customers to complete these steps ?
Any help would be appreciated
There is no token migration involved for the delegation case (so, ignore the migrations docs: https://developers.google.com/accounts/docs/OAuth_ref#migration).
In order to migrate to OAuth2 in this case, you will have to implement Google's 2-legged OAuth2. For information on how to do so, check out Google's 2-legged OAuth2 and Google Drive SDK delegation docs.
Hope that helps!