I have developed a personal tab in teams that is hosted in azure. Based on the Teams Toolkit i added sso functionality to the tab. Thats working really nice, the user is silently authenticated, i can get the user identity and so on.
Now i have an azure function as http trigger aka Web Api with EasyAuth (Microsoft Identity Provider/Azure AD) configured and it's working as expected.
My last part is to load data within my personal tab in teams from my azure web api. What is the recommended approach to do this? It is possible to get the access token based on my teams identity (without extra user consens/interaction)? Or should i use an api key/secret in that case?
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I'm trying to setup an application to validate identity using Azure AD and acquire a token to allow access to a secure api. The front end application is written in angular and allows anonymous access. What can I use to access AAD authenticate and return an access token?
This will be an angular 6+ UI that is communicating to a secure .Net api using Azure AD for authentication. I have done a couple days research and everything points to a user logging in to authenticate using the login page. I need it to be by app and open the login page. I tried a couple examples where it utilized authentication/authorization and that didn't work because the app needs to authorization the user to talk to the api. I have seen where people were using Microsoft graph but once again it was user based and they were redirected to an azure login. I am looking for a solution that will allow me to setup an account in azure ad and authenticate the app on start to get an access token to allow communication to my secure api. If I have missed something somewhere in my research and test attempts let me know. This is my first Azure AD auth attempt and I feel like I am missing something for application authorization.
The problem is an Angular app is what we call a public client.
It cannot hold secrets and thus cannot prove its identity.
So, only user-based authentication flows should be used by public clients.
Confidential clients on the other hand can hold secrets as they run on servers that you control.
So for example, a back-end Web application or API would be a confidential client.
Those can use the client credentials flow to acquire access tokens and call APIs as themselves without a user being involved.
There is a bit of a fundamental issue in your question.
Your API requires authentication, but you want functionality to be available to anonymous users.
So you want to bypass authentication.
If you really want to bypass authentication for parts of the API, you could just make those endpoints available anonymously without a token.
Be warned possibly noob question ahead.
I'm a little unsure where exactly Azure AD or IdentityServer is supposed to fit in in the overall communication flow.
Here is a scenario that I often face.
Some "dumb" client (e.g. a Windows App that can't use external assemblies or some JavaScript in a web app) has to contact my Web API which will then contact other APIs or other resources.
If I want to try and implement either Azure AD or IdentityServer as a means of authentication and authorization in the Web API, I don't see that this can be done in any other way, than it has to be the Web API that communicates with Azure AD or IdentityServer as the client doesn't have the ability to do so due to the lack of required assemblies.
If this assumption is not correct, then how would I do this?
If it is correct however, then what means of security is there between the client and the Web API other than communicating over HTTPS when the client has to send it's credentials to the Web API, so the Web API can authenticate and authorize the user against either Azure AD or IdentityServer?
If I understand your requirements correctly, then you are able to change the client Windows app, but unable to add external assemblies to it? So you would not be able to add the ADAL NuGet package to it.
You can still use Azure AD authentication - it is possible, but not trivial, to implement the client code yourself.
Or you can, as you already mentioned, pass the user's credentials to the Web API somehow, and then use that to have the Web API do authentication towards Azure AD on behalf of the user. There is a sample app which shows how to use username/password credentials.
This however, goes against the whole OAuth/OpenIdConnect mindset, where your app should never know the user's credentials.
Here:
https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/active-directory/develop/active-directory-v2-protocols-oidc.md
Be careful with trying to use the most recent version of the Azure AD endpoint (just don't use version 2.0, they shot themselves in the foot by excluding all Azure AD webapp registrations & by "securing" web APIs by making them only available to apps with the same appid - as far as I'm concerned, it's unusable until they fix those two issues) - see the "[!NOTE]" near the top of that linked page for the v2.0 limitations.
Using above service with Xamarin form, I have enable authentication with OAuth (Microsoft and Google). API call are working fine and those functions with [Authorize], are being enforced with authentication.
However, we're using server side authentication, hence after received the user token from respective provider, we check in our database if the user account is in there. If not there, we call another API function, to insert this account in the database and give user demo access to our app.
Hence, I should't have any authentication on this function. How to secure the function, to allow such user creation only from the app and not directly from the API site?
(I'm thinking of using a hardcoded key, and pass it parameter to the function if not other secure method is available)
I covered this in my blog. See https://shellmonger.com/2016/05/13/30-days-of-zumo-v2-azure-mobile-apps-day-20-custom-api/ for the first day, and then Day 21/22 as well.
I am working on an application which has an azure asp.net mvc website and an azure mobile service. Both will be using the same azure sql database.
I understand that I can use custom or Microsoft, Facebook based authentication using my mobile service. The website and the mobile app that I will be building though will have different features in the website and on the mobile app based on the role of the user.
How should I go about implementing user roles? If this was just an asp.net application, I would have just used ASP.NET Identity but not sure how to do this with Mobile Services.
I found a similar question asked a year ago with no resolution - Using ASP.NET 4.0 membership provider with Azure Mobile Services
If there is an existing implementation or guidance out there, please point me in that direction. Thanks.
As of today, there isn't a super easy way to handle this no matter how you slice it. You can take a look at this post (there is another dealing with the JavaScript backend that is linked from this) http://www.acupofcode.com/2014/04/general-roles-based-access-control-in-the-net-backend/ that talks about role based access control using Azure Active Directory. AAD may not be the option you want to go with. In which case, you'd need to implement the roles and checks in your Mobile Service yourself. If you only have two levels such as "normal user" and "admin" you COULD dictate everything based off of the user.level property and if they are "authenticated" they only have basic user access but if they're "admin" they have admin functionality. You'd still need to do the role based logic in your backend but I think you'll need to handle that no matter what.
Alternatively, what I think you could look at doing, is using the ASP.NET Identity system. Then from your Mobile Service, you can use the same type of custom auth I've documented here (http://chrisrisner.com/Custom-Authentication-with-Azure-Mobile-Services-and-LensRocket) but instead of checking against and storing a username/password in your Mobile Service like that sample is doing, when the user goes to register / login, you could check against the user backend created by the ASP.NET identity system. I don't have a sample off hand of that working but it sounds doable in my head.
I am new to windows azure development.
I am developing an application for hosting online tests.
This application needs to have multiple authentication options like Windows live ID, Facebook etc.
It also needs to have default form based authentication fed by the database in back end (simple User name and Password match).
Based on the authentication mechanism different permissions will be available to the user.
Can anyone please suggest how i should proceed on this?
Thanks
Do you really need forms authentication, or do you just need an application specific store where people can use a credential specific to your app?
I'd suggest researching Windows Azure Active Directory and Windows Azure Access Control Services together. You may create either an AD tenant for your application store and use it as an Identity Provider for ACS or you could host your own Secure Token Service and Identity Provider which uses your backend database as the user store also registered with ACS. This means that all of your authentication goes through the same process and allows for you to have your own user store, plus the social Identity Provider capability.
The key here is that you want try to avoid having forms authentication AND Social, but rather a mechanism where multiple Identity Providers can be used, including one of your own.
As Gaurav stated there are a ton of resources out there for this:
Understand the difference between WAAD and ACS.
Provisioning an Azure AD Tenant as a Identity Provider in ACS
Windows Azure Identity
There are also many blogs and MSDN documents talking about how to set these up.
If you start with the default "ASP.net MVC4 Web Application" template in Visual Studio you get a web application mini-sample with an AccountController that supports local and 'social' accounts out of the box. See documentation here. It is based on DotNetOpenAuth (a fantastic lib with terrible documentation) and a Microsoft implementation of an special MembershipProvider which lives in WebMatrix.WebData.
Regarding the Azure Access Control Service 2.0: I have no idea what the status of this service is but it looks to me as if MS itself tries to discourage developers form using this service since it was to deeply hidden somewhere under Windows Azure Active Directory in the documentation.