I am using controllerbase.challenge in asp.net core to authenticate my web application against an oidc provider. In all but one deployment environments, i see the appropriate redirect to the oidc provider when i hit my mvc endpoint where I am invoking controllerbase.challenge.
What could be an explanation for this? Everywhere else I see a 302 to the oidc provider except in the problematic environment where I see a 200 ok response
public IActionResult Authenticate()
{
return Challenge(new AuthenticationProperties { RedirectUri = "/" }, OpenIdConnectDefaults.AuthenticationScheme);
}
Was a cookie error which could be seen if you opened the developer tab in the browser
Related
My application is a hybrid approach where use ASP.NET Core MVC as my backend. I have various controllers which my front end uses to pull data from our database and also to do API calls on MS Graph. I am using the following program.cs file to get the authentication initiated when a user first logs on to the site:
//authentication pipline
builder.Services.AddHttpContextAccessor();
var initialScopes = builder.Configuration.GetValue<string>("DownstreamApi:Scopes")?.Split(' ');
builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
.AddMicrosoftIdentityWebApp(options =>
{
builder.Configuration.Bind("AzureAd", options);
options.Events = new OpenIdConnectEvents
{
//Tap into this event to add a UserID Claim to a new HttpContext identity
OnTokenValidated = context =>
{
//This query returns the UserID from the DB by sending the email address in the claim from Azure AD
string query = "select dbo.A2F_0013_ReturnUserIDForEmail(#Email) as UserID";
string connectionString = builder.Configuration.GetValue<string>("ConnectionStrings:DBContext");
string signInEmailAddress = context.Principal.FindFirstValue("preferred_username");
using (var connection = new SqlConnection(connectionString))
{
var queryResult = connection.QueryFirst(query, new { Email = signInEmailAddress });
var claims = new List<Claim>
{
new Claim("UserID", queryResult.UserID.ToString())
};
var appIdentity = new ClaimsIdentity(claims);
context.Principal.AddIdentity(appIdentity);
}
return Task.CompletedTask;
},
};
}).EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
.AddMicrosoftGraph(builder.Configuration.GetSection("DownstreamApi"))
.AddInMemoryTokenCaches();
//Add Transient Services
builder.Services.AddTransient<IOneDrive, OneDrive>();
builder.Services.AddControllers(options =>
{
var policy = new AuthorizationPolicyBuilder()
.RequireAuthenticatedUser()
.Build();
options.Filters.Add(new AuthorizeFilter(policy));
}).AddMicrosoftIdentityUI();
builder.Services.AddRazorPages().AddRazorPagesOptions(options =>
{
options.Conventions.AllowAnonymousToFolder("/Login");
options.Conventions.AuthorizeFolder("/");
options.Conventions.AuthorizeFolder("/files");
}).AddMicrosoftIdentityUI();
// Add the UI support to handle claims challenges
builder.Services.AddServerSideBlazor()
.AddMicrosoftIdentityConsentHandler();
builder.Services.AddRequiredScopeAuthorization();
In the Azure AD portal my application is registered as a web app. So when a user initially goes to the site they are redirected to https://login.microsoftonline.com/blahblah to get the login process started. This is automated by the Azure AD identity platform. Then once the login occurs they are redirected to localhost where the VueJS spa is loaded (localhost:43862). My spa uses various axios requests to the controllers and they pull data and vue router loads components. However, my issue is say the user needs to relog in because the cookie is expired or they logged out in another tab. The next axios request made by the expired session does not redirect the user to Azure login screen but instead results in an CORS error. So I need to get my axios requests to force the page redirect to Azure AD login screen (which probably is the worst idea since CORS policy is resulting in error) or have it return a redirect to localhost/login which is my own custom login screen with a button to Azure AD login and shouldnt impact CORS. So how do I intercept this Azure AD redirect to Azure AD login and replace with my own?
I have also tried to return a 401 error code so I could check for that in my axios request but to no avail it does nothing. If I put a breakpoint there it does hit this code but it does not change the status code of the response and I still get 302. My code for that was to try and add to the event :
OnRedirectToIdentityProvider = context =>
{
context.Response.StatusCode = 401;
return Task.CompletedTask;
}
My other ideas was maybe I should set my CORS policy to allow redirects from login.microsoft.com? Or would this be bad practice?
I can answer part of your question... First, for our API application which is protected by Azure AD, what the API should do is validating the request whether it contained a correct access token in the request header, if yes, give the response, if no, then give error like 401 or 403. A normal API application shouldn't have a UI to let users sign in. Anyway, if you want to expose an API in an MVC project, it's OK, but for API itself, it shouldn't have a UI.
Let's see sample below, I had a .net 6 web api project, and here's my program.cs:
using Microsoft.Identity.Web;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddMicrosoftIdentityWebApiAuthentication(builder.Configuration);
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseAuthentication();
app.UseAuthorization();
app.MapControllers();
app.Run();
And it requires configurations in appsetting.json.
"AzureAd": {
"Instance": "https://login.microsoftonline.com/",
"ClientId": "azure_ad_client_id",
"ClientSecret": "client_secret",
"Domain": "tenant_id",
"TenantId": "tenant_id",
//"Audience": "api://azure_ad_client_id_which exposed_api" // here I used the same azure ad app to expose API, so I can comment this property
},
And this is the Controller：
[ApiController]
[Route("[controller]")]
[Authorize]
public class WeatherForecastController : ControllerBase
{
[RequiredScope("Tiny.Read")]
[HttpGet]
public string Get()
{
return "world";
}
}
I had an Azure AD app, and I exposed an API like this:
I also add this API for the same Azure AD app.
Then let's do a test. When I call this API directly, I will get 401 error:
If I used an expired token within the request, I will also get 401 error:
But if I used a correct token(go to https://jwt.io to decode the token, we should see it containing correct scope, for me its "scp": "Tiny.Read",), I will get response:
And till now, the API part had finished. Let's see the client SPA. For SPA, you should integrate MSAL so that you can make your users to sign in via Azure AD, and generate the access token for calling MS graph API or your own API. The code for generating access token should be the same but you should set different scope for different API. In my scenario, my API required a scope Tiny.Read, then I should set in my client App.
Here's an screenshot for generating access token in react. You need to set the scope in your code.
Now you have the method to generate access token, you already know the API url. Then you can send request to call api, using AJAX, using fetch, or something else, sending an http request is ok. And in the calling api part, you also need to handle the response. If the response code is 401, then you need to do some logic, maybe redirect to the sign in page. And you said you had trouble here, you met CORS issue. I can't answer this part. I think it depends on how you redirect to Azure AD sign in page. I'm afraid you can take a look at this sample to learn how to sign in users and call graph api.
We use a third party site for authentication
Our site (angular) -> 3rd party login prompt -> our site(.NET)
When they send us the auth code, they address our web service in return
[HttpGet]
[Route("authorize")]
public async Task<IActionResult> Authorize(some code)
{
// we call a web service to get an access token and an expiration time with the provided code
...
// storing cookie since web site needs the token to use our api
CookieOptions option = new CookieOptions();
option.Secure = true;
option.HttpOnly = false;
option.Expires = data.expires; // 3600
Response.Cookies.Append(key, data.access_token, option);
return Redirect("https://ourwebsite/authorized");
}
problem: I always have to refresh the page once this is done
the stored cookie is the previous value until I F5 the browser
what am I missing ?
thanks for your help
I have a working ServiceStack API that authenticates against a AzureAD tenant. We are trying to move this to start using Azure B2C. The application is build with c# and runs on net 5.0. I've managed to change the configuration to use the 'correct' config. I'm then using Postman to get my access token from my tenant suing the authorization code flow.
However, when i make a request to the api, the response is always a 401 status code.
Where in the servicestack code can I put a break point to see why this failure is happening? I have tried multiple places in our AppHostConfigurator.cs/AppHost.cs files, but the break points doesn't appear to display why a 401 is being sent back as a response. I'm sure it's something related to wrong claims/roles expected etc, maybe the Azure ADB2C application being setup incorrectly, but obviously i need to know exactly so that i can resolve.
I'm setting up the authentication like this:
private static void ConfigureAuthentication(IAppHost host)
{
var authProviders = new List<IAuthProvider> {new NetCoreIdentityAuthProvider(host.AppSettings)};
if (host.AppSettings.GetAllKeys().Contains("AzureAdB2C"))
{
var debugMode = host.AppSettings.Get(nameof(HostConfig.DebugMode), false);
var azureSettings = host.AppSettings.Get<AzureAdB2COptions>("AzureAdB2C");
var jwt = azureSettings.GetB2CJWTProviderReader(debugMode);
jwt.PopulateSessionFilter = (session, payload, request) =>
{
if (session.Email == null && payload.ContainsKey("upn") && payload["upn"].Contains("#"))
session.Email = payload["upn"];
if (session.UserName == null && payload.ContainsKey("unique_name"))
session.UserName = payload["unique_name"];
};
authProviders.Add(jwt);
}
var auth = new AuthFeature(() => new AuthUserSession(), authProviders.ToArray())
{
HtmlRedirect = "/account/signin",
HtmlLogoutRedirect = "/account/signout",
IncludeAssignRoleServices = false,
IncludeRegistrationService = false
};
// remove default service authentication services
auth.ServiceRoutes.Remove(typeof(AuthenticateService));
host.Plugins.Add(auth);
}
We are using swagger as well to call the API (which works as expected). This question is more about that requests that are submitted with a bearer token.
thanks
Please refer to this existing answer for examples of how to validate why a 3rd Party JWT Token is invalid with ServiceStack's JWT Auth Provider.
I setup an MVC project with Aspnet Core targeting Net461. Authentication is configured to use Adfs from a Windows Server 2016 system. I managed to get sign in working, however, when I click sign out I am given a page cannot be displayed error. Browsing back to the home url shows that the user is still logged in also. Any suggestions?
You might find this sample useful (even though it is for Azure ADFS, it works for local installs as well): https://github.com/Azure-Samples/active-directory-dotnet-webapp-openidconnect-aspnetcore
The logout action method like the following work well in my case:
[HttpGet]
public IActionResult SignOut()
{
var callbackUrl = Url.Action(nameof(SignedOut), "Account", values: null, protocol: Request.Scheme);
return SignOut(
new AuthenticationProperties { RedirectUri = callbackUrl },
CookieAuthenticationDefaults.AuthenticationScheme,
OpenIdConnectDefaults.AuthenticationScheme);
}
This will redirect you to the /Account/SignedOut after it completes and you need to register your /signout-callback-oidc endpoint for your client as well. This endpoint is used (by default) by the OIDC ASP.NET Core middleware.
Ok so i tried hosting the simplest oauth sample and the identity server both on iis, i have enable cors on the simplest oauth sample. So when i test the api using the javascript implicit client, on iis express it works flawlessly, it gets the token then when the token is sent the web api checks the token and authorizes the javascript client. the problem happens when i move the javascript imlicit client, the identity server, and the simple oath web api is hosted on iis, the javascript brings back the token correctly but when the token is sent to the web api it always return 401 unauthorized. So is there any configuration i have to add in order to run it on iis. i have made sure that anonymous authentication is the only enab;ed authentication mode. Any help or pointer is deeply appreciate.
I am trying to implement the samples given on iis. thanks for the help
I had the same issue. It was coming from my self signed certificate.
Try adding to your IdentityServerOptions
RequireSsl = false
and switch the WebApi Authority to use http.
Edit
Server Side Configuration
public void ConfigureIdentityServer(IAppBuilder app)
{
//Configure logging
LogProvider.SetCurrentLogProvider(new DiagnosticsTraceLogProvider());
//This is using a Factory Class that generates the client, user & scopes. Can be seen using the exmaples
var IdentityFactory = Factory.Configure("DefaultConnection");
app.Map("/identity", idsrvApp =>
{
idsrvApp.UseIdentityServer(new IdentityServerOptions
{
SiteName = "Security Proof of Concept",
SigningCertificate = LoadCertificate(),
Factory = IdentityFactory,
CorsPolicy = CorsPolicy.AllowAll,
RequireSsl = false
});
});
}
JavaScript
After receiving the token make sure it's inserted in the Authorization Header..
JQuery Example
$.ajax({
url: 'http://your.url',
type: GET,
beforeSend: function (xhr) {
xhr.withCredentials = true;
xhr.setRequestHeader("Authorization", " Bearer " + apiToken);
}
});
WebApi Resource
app.UseIdentityServerBearerTokenAuthentication(new IdentityServerBearerTokenAuthenticationOptions
{
//Location of identity server make full url & port
Authority = "http://localhost/identity",
RequiredScopes = new[] { "WebApiResource" }
//Determines if the Api Pings the Identity Server for validation or will decrypt token by it's self
//ValidationMode = ValidationMode.Local
});
Best way to determine what is happening is enable logging.