I'm developing an ASP .NET application, nothing fancy just another LOB App.
Our company's authentication model is based on a typical AD setup. Nearly all of our applications are written on Sharepoint so it is a requirement that the authentication is "automatic", meaning that once you are logged on your machine you have access to all your applications without writing another user or pwd.
For some reasons i cannot develop this app over Sharepoint.. so, the question is How Can I Automatically Authenticate AD users on my web App?
thanks in advance
You need to enable Windows Authentication on the web app. This article has enough details to get you started.
PrincipalContext Authenticator = new PrincipalContext(ContextType.Domain, 'yourDomainName');
AuthenticationFailed = !Authenticator.ValidateCredentials(Username, Password);
If AuthenticationFailed; you can redirect to login page..
Related
Hello Stack Community.
I'm looking for formal name of technology/technique that's being used in Microsoft Azure CLI and in Epic Games Desktop application, that is responsible for delegation of authentication from target application to browser, where you perform OpenID Connect authentication and brings you back to target application: CLI App or Desktop App, where you can proceed as logged in user by using authentication you gained via browser.
The steps would be:
you launch target app (CLI, desktop app)
login attempt lets you choose oAuth OIDC via Google or so
selecting it opens default browser, where you proceed with login
You gain auth inside app you started from (CLI, dektop app)
In classic OIDC process you gaining your token in same app/browser environment, while here authorization is expected in app A, token is gained in web browser and afterwards there is possibility to re-use it in completely different application.
I'm wondering is this some particular OIDC extension, usage of some particular grant flow or just some particular hacky way of sharing token across entities?
I found one online resource here but my investigation don't confirm starting of any redirection URL localhost server for toke possession.
I'd appreciate any help in my investigation.
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.
I'm developing an Enterprise/Internet Application with WebAPI 2 RESTful server and SPA web client (Angular2) —So I have two separated projects created using ASP.NET 4.6 Empty template and both use OWIN and are IIS hosted.
The requirement for Authentication is:
Active Directory user which is logged in to the workstation will authenticated automatically once she opens any page from app in the browser if user id/name found in the database, with no need to enter her user/pass. Let name this as auto-login. Else if it's not found in the DB it will redirected to the login page.
Also there should be a logout option which redirects user to the login page after logging she out.
In the login page any AD user can enter her/his AD user&pass and after successful check against database (existed) and AD (valid credential) she/he will logged in to the system (Obviously it may be different than user currently is logged in to the workstation)
In addition to the web client it will have other clients such mobile apps which will connect and be served by the WebAPI back-end. Users will login there using their AD user & pass too. Let name it manual-login.
According to the REST architecture and having both AD enterprise and internet/mobile users together, the authentication should be token based —this is what I found till now but I'm not sure.
I read about OWIN Authentication architecture and Windows Authentication and I checked MixedAuth, Now I think it is the nearest solution for this requirement as it lets app-defined users to authenticate side by side of windows/AD users. But even after dig into it and its SPA sample I didn't found my way yet and confused.
Anyone can help?
What should I actually do on the WebApi server and SPA Client to accomplish those authentication requirements?
Which middlewares should I add and how should config/manipulate them?
UseCookieAuthentication ?
UseExternalSignInCookie ?
UseOAuthBearerTokens ?
Can I rely just on Bearer tokens (using OAuthBearerTokens MW) and get same token for authenticated windows users to unify authentication model based on bearer tokens? If so, how?
How and where should I put my code for checking that AD user exists in the DB and if not so reject the authentication?
Thanks a lot.
I'm trying to write a C# console app that will register an application in Azure Active Directory. It should work just as the web application project creation wizard in VS 2013 when you Change Authentication and select Organizational Accounts in Azure.
Following the fiddler trace, I can see that it authenticates the user using wsfederation and an oauth2 token and then uses the graph.windows.net graph api to configuration the AAD directoryObjects service principal and application.
I have tried to use the sample Graph API app, but it requires the app be registered first so that I have the clientId (application id) and password (key) to send in the Acquire Token request using the Windows Azure AD Authentication Library for .NET.
I've tried using a bunch of the different Azure APIs but they all have my chicken and egg problem, I want to use an unregistered client application to register an application in AAD. I need to avoid Configuring Application Authentication and Authorization for the Graph API so that the user has no manual steps.
Does anyone know how Visual Studio does it, using just the user login with browser prompt or if there is a standard application id and password that can be used to access the graph API, like there is the standard login URL, https://login.windows.net/common? Some C# samples would be greatly appreciated.
This post does the Application creation, but requires a clientId and password, which I don't think I have.
You can't register a new application using the Graph API from an unregistered client. The only reason the VS2013 flow works is because VS2013 is already registered in a special way within Azure AD -- it's a first party application and has unique permissions. In my Fiddler trace, VS2013 uses a client ID of 872cd9fa-d31f-45e0-9eab-6e460a02d1f1. Technically you can use this client ID and the redirect URI of VS2013 to initiate sign-on with Azure AD. This still involves user interaction (the user has to authenticate via browser pop-up) so it doesn't meet your requirement for "no manual steps," but it's somewhat helpful for understanding the protocol flows and how registration works.
The bottom line is that if you want to call the Graph API without user interaction (client credential flow), the client needs to be registered with the proper application permissions.
I have a Silverlight 4 application that uses RIA services and Windows Authentication. I am trying to make it so that if authentication fails the user gets redirected to a login page. I cannot get the login page to authenticate the user's username and password because "Windows authentication does not support logging in."
Does anyone know how to authenticate a user's windows account via a custom login page using RIA services and the Authentication Service?
Thanks in advance!
Excuse my bad english.
Well, i had the same problem, but i looked this video and find one way to implement a windows authentication login with Silverlight 4.
http://channel9.msdn.com/Shows/SilverlightTV/Silverlight-TV-44-Top-Four-Questions-from-the-WCF-RIA-Services-Forum
In the minute 12:20 begin the rock and roll! ;)