How to get On-Behalf-Of-User token in .NET using ADAL - c#

I have created an Azure AAD app of type webapp which has client secret and redirect url. Now, I want to get an access token on behalf of user using the AAD app. From looking at the documentation, I got the following code so far.
static void Main(string[] args)
{
var clientId = "<REDACTED>";
var clientSecret = "<REDACTED>";
var resourceAppIdURI = "https://api.office.com/discovery/";
var authority = "https://login.microsoftonline.com/common";
AuthenticationContext ac = new AuthenticationContext(authority, new FileCache());
ClientCredential cc = new ClientCredential(clientId, clientSecret);
// Get token as application
var task = ac.AcquireTokenAsync(resourceAppIdURI, cc);
task.Wait();
var appToken = task.Result.AccessToken;
// Get tokenn on behalf of user
UserCredential uc = new UserCredential("usrname#mytenant.com");
task = ac.AcquireTokenAsync(resourceAppIdURI, clientId, uc);
var userToken = task.Result.AccessToken;
Console.ReadLine();
}
But this is the error I get when I try to get user token is as follows.
Message "AADSTS70002: The request body must contain the following
parameter: 'client_secret or client_assertion'.\r\nTrace ID:
0e977f67-d5cb-4cf5-8fea-bac04b6d0400\r\nCorrelation ID:
824a96bf-8007-4879-970c-2680644b8669\r\nTimestamp: 2017-07-21
05:02:41Z" string
Why am I getting this error and how to fix it?
Do I need to login with the user first and then use UserAssertion instead ?
There are tonnes of overloaded methods for AcquireTokenAsync method, but not sure what I should use.
I also looked at this github url to see how they are doing it
https://github.com/Azure-Samples/active-directory-dotnet-webapi-onbehalfof/blob/8afb3e6a648d8e7246685bf6747d009006c761b8/TodoListService/Controllers/TodoListController.cs
This is the relevant code to get token as logged in user
ClientCredential clientCred = new ClientCredential(clientId, appKey);
var bootstrapContext = ClaimsPrincipal.Current.Identities.First().BootstrapContext as System.IdentityModel.Tokens.BootstrapContext;
string userName = ClaimsPrincipal.Current.FindFirst(ClaimTypes.Upn) != null ? ClaimsPrincipal.Current.FindFirst(ClaimTypes.Upn).Value : ClaimsPrincipal.Current.FindFirst(ClaimTypes.Email).Value;
string userAccessToken = bootstrapContext.Token;
UserAssertion userAssertion = new UserAssertion(bootstrapContext.Token, "urn:ietf:params:oauth:grant-type:jwt-bearer", userName);
string authority = String.Format(CultureInfo.InvariantCulture, aadInstance, tenant);
string userId = ClaimsPrincipal.Current.FindFirst(ClaimTypes.NameIdentifier).Value;
AuthenticationContext authContext = new AuthenticationContext(authority, new DbTokenCache(userId));
Here they already have a logged in user and creating a UserAssertion from that loggedin user's token. In my console app, the user hasn't logged in yet.
So I need a way to do this in my console app. How can I show the AAD login page to the user as a pop-up and then once the user enters creds use that info to create an UserAssertion object?
thanks

Your scenario is a native application that calls a web API on behalf of a user . The native application could obtains an access token for the user by using the OAuth 2.0 authorization code grant , then access token is then sent in the request to the web API, which authorizes the user and returns the desired resource :
Please read more about the description of protocol flow here .Also see the code samples for Native Application to Web API scenarios.
In addition , you could click here for code sample about how to call the Azure AD Graph API from a native client(.net console application ) ,it uses the Active Directory Authentication Library (ADAL) for authentication .

Related

Generate user token from AuthenticationContext

I am trying to generate a user token for the purpose of testing an API that requires one. The tests run automatically. I have the following code example, but it seems to be out of date
Uri endpointUri = new Uri("my endpoint");
string resource = "my rid";
string clientId = "my client id";
PlatformParameters parameters = new PlatformParameters(PromptBehavior.Auto);
string authContextURL = "my url";
var authenticationContext = new AuthenticationContext(authContextURL, new TokenCache());
// Here you are sending a request to AAD with the user credentials.
AuthenticationResult result = await authenticationContext.AcquireTokenAsync(resource: resource, clientId: clientId, redirectUri: endpointUri, parameters);
// If the request succeeded you can get the user access token as follows.
return result.AccessToken;
The reason I believe it to be out of date is that PlatformParameters now requires 2 parameters, and I cannot find what the 2nd parameter should be by default.
My question is, how can I create a user-context token to use in testing my API from the test code?
EDIT
According to this answer, PlatformParameters with 1 param is for .netframework, whereas I am using .net 6
Still looking to any leads there may be!

Code: BadRequest Message: /me request is only valid with delegated authentication flow

I am trying to upload file on onedrive by using microsoft graph onedrive api.
I am using the method for authentication
Client credentials provider
https://learn.microsoft.com/en-us/graph/sdks/choose-authentication-providers?tabs=CS#client-credentials-provider
Like:
// /.default scope, and preconfigure your permissions on the
// app registration in Azure. An administrator must grant consent
// to those permissions beforehand.
var scopes = new[] { "https://graph.microsoft.com/.default" };
// Multi-tenant apps can use "common",
// single-tenant apps must use the tenant ID from the Azure portal
var tenantId = "my-tenantid";
// Values from app registration
var clientId = "YOUR_CLIENT_ID";
var clientSecret = "YOUR_CLIENT_SECRET";
// using Azure.Identity;
var options = new TokenCredentialOptions
{
AuthorityHost = AzureAuthorityHosts.AzurePublicCloud
};
// https://learn.microsoft.com/dotnet/api/azure.identity.clientsecretcredential
var clientSecretCredential = new ClientSecretCredential(
tenantId, clientId, clientSecret, options);
var graphClient = new GraphServiceClient(clientSecretCredential, scopes);
HttpPostedFileBase file = Request.Files;[0];
int fileSize = file.ContentLength;
string fileName = file.FileName;
string mimeType = file.ContentType;
Stream fileContent = file.InputStream;
var res = await graphClient.Me.Drive.Root.ItemWithPath(fileName).Content
.Request()
.PutAsync<DriveItem>(fileContent);
After executing this code then it gives an error in response.
Message: /me request is only valid with delegated authentication flow.
Inner error:
AdditionalData:
date: 2021-12-29T05:30:08
request-id: b51e50ea-4a62-4dc7-b8d2-b26d75268cdc
client-request-id: b51e50ea-4a62-4dc7-b8d2-b26d75268cdc
ClientRequestId: b51e50ea-4a62-4dc7-b8d2-b26d75268cdc
Client credential flow will generate the token on behalf the app itself, so in this scenario, users don't need to sign in first to generate the token stand for the user and then call the api. And because of the design,when you used Me in the graph SDK, your code/app don't know who is Me so it can't work. You should know the user_id first and use /users/{id | userPrincipalName} instead of /Me, in the SDK, that is graphClient.Users["your_user_id"] instead of graphClient.Me
In your scenario, there're 2 solutions, one way is using delegated authentication flow like what you said in your title, another way is get the user id before calling the graph api so that you can use Users["id"] but not Me
===================== Update=========================
I haven't finished the code yet but I found the correct solution now.
Firstly, we can upload file to one drive by this api, you may check the screenshot if this is one drive or sharepoint:
https://graph.microsoft.com/v1.0/users/user_id/drive/items/root:/testupload2.txt:/content
If it is, then the next is easy, using the code below to get an access token and send http request to calling the api:
var scopes = new[] { "https://graph.microsoft.com/.default" };
var tenantId = "tenant_name.onmicrosoft.com";
var clientId = "your_azuread_clientid";
var clientSecret = "corresponding_client_secret";
var clientSecretCredential = new ClientSecretCredential(
tenantId, clientId, clientSecret);
var tokenRequestContext = new TokenRequestContext(scopes);
var token = clientSecretCredential.GetTokenAsync(tokenRequestContext).Result.Token;
I know it's complex because the api is not the same as this one which has SDK sample, but I think it also deserves to try if they are similar.

Unable to authorize Azure LogAnalytics Workspace

I am trying to connect to my workspace in the Azure Portal. I am getting the error as
Operation returned an invalid status code 'Unauthorized'.
The creds object has fetched the Authentication Token and I have added resource permissions to my app as mentioned in this link
using System;
using Microsoft.Azure.OperationalInsights;
using Microsoft.Rest.Azure.Authentication;
namespace LogAnalytics
{
class Program
{
static void Main(string[] args)
{
var workspaceId = "**myworkspaceId**";
var clientId = "**myClientId**";
var clientSecret = "**myClientSecret**";
//<your AAD domain>
var domain = "**myDomain**";
var authEndpoint = "https://login.microsoftonline.com";
var tokenAudience = "https://api.loganalytics.io/";
var adSettings = new ActiveDirectoryServiceSettings
{
AuthenticationEndpoint = new Uri(authEndpoint),
TokenAudience = new Uri(tokenAudience),
ValidateAuthority = true
};
var creds = ApplicationTokenProvider.LoginSilentAsync(domain,clientId, clientSecret,
strong textadSettings).GetAwaiter().GetResult();
var client = new OperationalInsightsDataClient(creds);
client.WorkspaceId = workspaceId;
//Error happens below
var results = client.Query("union * | take 5");
Console.WriteLine(results);
Console.ReadLine();
}
}
}
Operation returned an invalid status code 'Unauthorized'.
According to the error message and the code you provided, you need to add permission in your registered application in Azure AD.
Note: If you want to add permission to application you need to be admin, and then you could use the ClientId and ClientSecret to get Authentication Token and read log analytics.
However, if you are not admin, you could delegate permission to user and access to Azure AD with username and password.
To get authentication token with user, you could can use the function UserTokenProvider.LoginSilentAsync(nativeClientAppClientid, domainName, userName, password).GetAwaiter().GetResult() to get our credentials.

Operation returned an invalid status code 'Unauthorized''

I am trying to embed a sample Power BI dashboard in a WPF application following the sample project and sort of tutorial from here. When I launch the app, I have to enter my password to authenticate myself and when it tries to get the list of my Power BI workspaces with the getAppWorkspacesList() I am getting this error message
Microsoft.Rest.HttpOperationException: 'Operation returned an invalid
status code 'Unauthorized''
Can someone please help in pointing out why this error is occuring? I tried to look into the details of the error, but I am not understanding what could be causing the issue. I was able to embed a dashboard in a .Net Web App without an issue, so I don't think the problem is in my Power BI or Azure Directory account.
private static string aadInstance = ConfigurationManager.AppSettings["ida:AADInstance"];
private static string tenant = ConfigurationManager.AppSettings["ida:Tenant"];
private static string clientId = ConfigurationManager.AppSettings["ida:ClientId"];
Uri redirectUri = new Uri(ConfigurationManager.AppSettings["ida:RedirectUri"]);
private static string authority = String.Format(CultureInfo.InvariantCulture, aadInstance, tenant);
private static string graphResourceId = ConfigurationManager.AppSettings["ida:ResourceId"];
private AuthenticationContext authContext = null;
TokenCredentials tokenCredentials = null;
string Token = null;
string ApiUrl = "https://api.powerbi.com";
public MainWindow()
{
InitializeComponent();
TokenCache TC = new TokenCache();
authContext = new AuthenticationContext(authority, TC);
}
private void getAppWorkspacesList()
{
using (var client = new PowerBIClient(new Uri(ApiUrl), tokenCredentials))
{
appWorkSpacesList.ItemsSource = client.Groups.GetGroups().Value.Select(g => new workSpaceList(g.Name, g.Id));
}
}
Based on your description, I assumed that you are using the Access token for Power BI users (user owns data) approach. I would recommend you use https://jwt.io/ to decode the access_token after successfully invoked authContext.AcquireTokenAsync. Make sure the aud is https://analysis.windows.net/powerbi/api and check the permissions scope property scp.
For Get Groups, the required scope would look as follows:
Required scope: Group.Read.All or Group.ReadWrite.All or Workspace.Read.All or Workspace.ReadWrite.All
You could also use fiddler or postman to simulate the request against the get groups endpoint with the access_token received in your WPF application to narrow down this issue.
Moreover, you could follow Register an application to check your Azure AD app and make sure the required delegated permissions to Power BI Service (Microsoft.Azure.AnalysisServices) API have been correctly configured.
We got the same error when we use app owns data approach. The way to solve that is described here.
Basically, the way to get access token documented in Microsoft website does not work. We end up making a REST API call to https://login.microsoftonline.com/common/oauth2/token and post the following data:
grant_type: password
scope: openid
resource: https://analysis.windows.net/powerbi/api
client_id: APPLICATION_ID
client_secret: APPLICATION_SECRET
username: USER_ID
password: USER_PASSWORD
You will get a JSON back and then you can get the access_token which will be used when creating power bi client like this:
var mTokenCredentials = new TokenCredentials(accessToken, "Bearer");
using (var client = new PowerBIClient(new Uri("https://api.powerbi.com"), mTokenCredentials))
I hope this can help someone. This is the original post.

B2B access in multi tenant application

I have succesfully setup a multi tenant application.
For now, I am able to authenticate the user and use tokens to access other resources. (Microsoft Graph & Microsoft AD Graph)
Now I want to get B2B working.
Current flow:
- User signs in
- AuthorizationCodeReceived gets the acquires the token (via $commonAuthority endpoint)
- When requesting a token for the Ad Graph, I am using the $tenantAuthority
This works perfectly when $tenantAuthority is the same tenant authority as the one where the account was created in.
However, if I login with another user (from another tenant, given trust to the actual tenant) and use $tenantAuthority = trusted authority, then I always the following error:
Failed the refresh token:
AADSTS65001: The user or administrator has not consented to use the application with ID
If I change $tenantAuthority to the 'source' tenant authority where the user was created in, everything works fine.
Any help would be greatly appreciated.
Update: Code sample
App has two tenants (tenantA en tenantB) and I will use a user from tenantB with tenantA given a trust to this user.
AuthorizationCodeReceived = async context =>
{
TenantContext.TenantId = "someguid";
var tenantId =
TenantContext.TenantId;
// get token cache via func, because the userid is only known at runtime
var getTokenCache = container.Resolve<Func<string, TokenCache>>();
var userId = context.AuthenticationTicket.Identity.FindFirst(ClaimTypes.ObjectIdentifier).Value;
var tokenCache = getTokenCache(userId);
var authenticationContext = new AuthenticationContext($"{configuration.Authority}",
tokenCache);
await authenticationContext.AcquireTokenByAuthorizationCodeAsync(
context.Code,
new Uri(context.Request.Uri.GetLeftPart(UriPartial.Authority)),
new ClientCredential(configuration.ClientId, configuration.ClientSecret),
configuration.GraphResourceId);
}
This code works perfectly. Login in with a user from both tenants works perfectly.
But when I need the Graph Service Client or ActiveDirectoryClient, I need to obtain access tokens to been able to address an api for a certain tenant. I retrieve the access tokens like this:
public IGraphServiceClient CreateGraphServiceClient()
{
var client = new GraphServiceClient(
new DelegateAuthenticationProvider(
async requestMessage =>
{
Logger.Debug("Retrieving authentication token to use in Microsoft Graph.");
string token;
var currentUserHomeTenantId = TenantContext.TenantId;
var currentUserObjectId = ClaimsPrincipal.Current.FindFirst(ClaimTypes.ObjectIdentifier).Value;
var authenticationContext =
new AuthenticationContext($"{_configuration.TenantAuthorityPrefix}{currentUserHomeTenantId}",
_tokenCacheFactoryMethod(currentUserObjectId));
var clientCredential = new ClientCredential(_configuration.ClientId, _configuration.ClientSecret);
try
{
token = await GetTokenSilently(authenticationContext, _configuration.GraphResourceId, currentUserObjectId);
}
catch (AdalSilentTokenAcquisitionException e)
{
Logger.Error("Failed to retrieve authentication token silently, trying to refresh the token.", e);
var result = await authenticationContext.AcquireTokenAsync(_configuration.GraphResourceId, clientCredential);
token = result.AccessToken;
}
requestMessage.Headers.Authorization = new AuthenticationHeaderValue(AuthenticationHeaderKeys.Bearer, token);
}));
return client;
}
public IActiveDirectoryClient CreateAdClient()
{
var currentUserHomeTenantId = TenantContext.TenantId;
var currentUserObjectId = ClaimsPrincipal.Current.FindFirst(ClaimTypes.ObjectIdentifier).Value;
var graphServiceUrl = $"{_configuration.AdGraphResourceId}/{currentUserHomeTenantId}";
var tokenCache = _tokenCacheFactoryMethod(currentUserObjectId);
var client = new ActiveDirectoryClient(new Uri(graphServiceUrl),
() => GetTokenSilently(
new AuthenticationContext(
$"{_configuration.TenantAuthorityPrefix}{ClaimsPrincipal.Current.FindFirst(ClaimTypes.TenantId).Value}", tokenCache
),
_configuration.AdGraphResourceId, currentUserObjectId
));
return client;
}
When I do a request with one of the two client SDK's, I got the following error:
Failed the refresh token: AADSTS65001: The user or administrator has not consented to use the application with ID.
Changing the catch method when retrieving the Token did the trick:
if(e.ErrorCode == "failed_to_acquire_token_silently")
{
HttpContext.Current.Response.Redirect(authenticationContext.GetAuthorizationRequestUrlAsync(resourceId, _configuration.ClientId, new Uri(currentUrl),
new UserIdentifier(currentUserId, UserIdentifierType.UniqueId), string.Empty);
}
I don't see that you mention that so: in a B2B collaboration you've to invite user from other tenant first. The steps are like that:
invite and authorize a set of external users by uploading a comma-separated values - CSV file
Invitation will be send to external users.
The invited user will either sign in to an existing work account with Microsoft (managed in Azure AD), or get a new work account in Azure AD.
After signed in, user will be redirected to the app that was shared with them
That works perfectly in my case.
Regarding some problems which I've detect:
Trailing "/" at the end of the active directory resource - try to remove it as this may cause problems. Bellow you will find some code to get authentication headers:
string aadTenant = WebServiceClientConfiguration.Settings.ActiveDirectoryTenant;
string clientAppId = WebServiceClientConfiguration.Settings.ClientAppId;
string clientKey = WebServiceClientConfiguration.Settings.ClientKey;
string aadResource = WebServiceClientConfiguration.Settings.ActiveDirectoryResource;
AuthenticationContext authenticationContext = new AuthenticationContext(aadTenant);
ClientCredential clientCredential = new ClientCredential(clientAppId, clientKey);
UserPasswordCredential upc = new UserPasswordCredential(WebServiceClientConfiguration.Settings.UserName, WebServiceClientConfiguration.Settings.Password);
AuthenticationResult authenticationResult = await authenticationContext.AcquireTokenAsync(aadResource, clientAppId, upc);
return authenticationResult.CreateAuthorizationHeader();
Applications provisioned in Azure AD are not enabled to use the OAuth2 implicit grant by default. You need to explicitly opt in - more details can be found here: Azure AD OAuth2 implicit grant

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