Accessing Event Grid management through Rest API - azure

I've run into a problem of not having the slightest idea how to authenticate with my back-end service in order to create a new subscription in a event grip topic using REST API. I've been stuck here for quite a while now, could anyone give m some pointers?
I managed to create the subscription using my own user access token, so everything regarding creation logic works. The only problem is authentication/authorization.

Here is the sample about getting the access token with c#:
var clientId = "your-application-id";
var clientSecret = "client-Secret";
var tenantId = "your-tenant-id";
var clientCredential = new ClientCredential(clientId, clientSecret);
var context = new AuthenticationContext("https://login.microsoftonline.com/" + tenantId);
var accessToken = context.AcquireTokenAsync("https://management.azure.com/", clientCredential).Result.AccessToken;
Console.WriteLine(accessToken);
Then refer to this sample for calling REST API with HttpClient.

Related

How to call Microsoft Graph from console application c#

I need to call Microsoft Graph API to create user in Azure AD.
First I need to test from console application and then need to implement in Azure function.
https://developer.microsoft.com/en-us/graph/graph-explorer
I am new to Microsoft Graph API , How can I connect and execute API from c# console application.
I have already registered the application in AAD.
I am trying to acquire token as :
string resourceId = "https://graph.microsoft.com";
string tenantId = "<tenantID>";
string authString = "https://login.microsoftonline.com/" + tenantId;
string upn = String.Empty;
string clientId = "<ClientID>";
string clientSecret = "<clientSecret>";
//string clientSecret = ConfigurationManager.AppSettings["clientSecret"];
log.Verbose("ClientSecret=" + clientSecret);
log.Verbose("authString=" + authString);
var authenticationContext = new AuthenticationContext(authString, false);
// Config for OAuth client credentials
ClientCredential clientCred = new ClientCredential(clientId, clientSecret);
AuthenticationResult authenticationResult = await authenticationContext.AcquireTokenAsync(resourceId,clientCred);
string token = authenticationResult.AccessToken;
log.Verbose("token=" + token);
I trying to use existing AADB2C.
b2c-extensions-app. Do not modify. Used by AADB2C for storing user data.
I have enabled permission as:
I neither get exception nor get access token and program silently exit
Also :
There is new library
<package id="Microsoft.Identity.Client" version="1.1.0-preview" targetFramework="net46" />
How can I direct login without login pop-up with the following and acquire token ?
PublicClientApplication
I assume that you already have Azure AD application with granted Administrative Consent.
In order to connect from a console app, you'll need to first obtain a valid token. Since you lack a UI, you'll want to Get access without a user. Note that this type of "app-only" token requires Administrative Consent before it can be used.
Then you have to add two NuGet dependencies to your dotnet project
<PackageReference Include="Microsoft.Graph" Version="1.15.0" />
<PackageReference Include="Microsoft.Identity.Client" Version="4.0.0" />
Microsoft.Identity.Client for authentication using Azure AD and Microsoft.Graph for executing MS Graph queries.
var tenantId = "you-azure-tenand-id";
var clientId = "azure-ad-application-id";
var clientSecret = "unique-secret-generated-for-this-console-app";
// Configure app builder
var authority = $"https://login.microsoftonline.com/{tenantId}";
var app = ConfidentialClientApplicationBuilder
.Create(clientId)
.WithClientSecret(clientSecret)
.WithAuthority(new Uri(authority))
.Build();
// Acquire tokens for Graph API
var scopes = new[] {"https://graph.microsoft.com/.default"};
var authenticationResult = await app.AcquireTokenForClient(scopes).ExecuteAsync();
// Create GraphClient and attach auth header to all request (acquired on previous step)
var graphClient = new GraphServiceClient(
new DelegateAuthenticationProvider(requestMessage => {
requestMessage.Headers.Authorization =
new AuthenticationHeaderValue("bearer", authenticationResult.AccessToken);
return Task.FromResult(0);
}));
// Call Graph API
var user = await graphClient.Users["Me#domain.com"].Request().GetAsync()
Update 2020.01
There is a new package Microsoft.Graph.Auth that simplify auth and token management.
Let's say you want to use some Beta API this time.
<PackageReference Include="Microsoft.Graph.Auth" Version="1.0.0-preview.2" />
<PackageReference Include="Microsoft.Graph.Beta" Version="0.12.0-preview" />
var tenantId = "you-azure-tenand-id";
var clientId = "azure-ad-application-id";
var clientSecret = "unique-secret-generated-for-this-console-app";
// Configure application
var clientApplication = ConfidentialClientApplicationBuilder
.Create(clientId)
.WithTenantId(tenantId)
.WithClientSecret(clientSecret)
.Build();
// Create ClientCredentialProvider that will manage auth token for you
var authenticationProvider = new ClientCredentialProvider(clientApplication);
var graphClient = new GraphServiceClient(authenticationProvider);
// Call Graph API
var user = await graphClient.Users["Me#domain.com"].Request().GetAsync()
In order to connect from a console app, you'll need to first obtain a valid token. Since you lack a UI, you'll want to Get access without a user. Note that this type of "app-only" token requires Administrative Consent before it can be used.
In order to support the Create User scenario, you will need to ensure your permission scopes include User.ReadWrite.All.
Once you have a valid token you can make calls into the Graph API. Graph is a REST API so all calls are made over HTTP with the token passed within the Authorization Header.
You can read a general overview at Get started with Microsoft Graph and REST. There are also several language/framework specific overviews available but all of them assume you have a UI (i.e. not simply console). Generally speaking, if you're looking for a console tool for creating users you may prefer using PowerShell.
This question is rather old, but it was one of the first questions that popped up when I initially needed to do the same thing. Below I will document the steps and resources I used to make it happen:
I used an O365 tenant (you can get one from office.com - note that you can get a one year developer trial). Once you have a tenant, you also have access to Azure portal if you log in as your tenant admin user. Under Azure Portal, go to Active Directory/properties to see the tenant ID.
I followed the instructions here https://learn.microsoft.com/en-us/azure/active-directory/develop/quickstart-v2-netcore-daemon to create a new registered application. I created a new secret and copied the value (that will be client secret in your console app). The registered application id will be the client ID in your console app.
I cloned the github repo in the above link and changed the values in the appsettings to the tenant ID, client ID, and client secret noted in the steps above.
The code in that repo has some methods called which no longer exist in ConfigurationBuilder as of .NETCore 2.1. I substituted these lines (there's probably a better / shorter way):
authenticationConfig.Tenant = Configuration.GetSection("Tenant").Value.ToString();
authenticationConfig.ClientId = Configuration.GetSection("ClientId").Value.ToString();
authenticationConfig.ClientSecret = Configuration.GetSection("ClientSecret").Value.ToString();
You should now be iterating through users in your tenant. You can go to the graph explorer ( https://developer.microsoft.com/en-us/graph/graph-explorer ) to find more URLs (find the line in Program.cs to substitute them). As far as I know so far, v2.0 of the API is "beta" (put "beta" where "v1.0" is - someone please correct me if I'm wrong).
await apiCaller.CallWebApiAndProcessResultASync("https://graph.microsoft.com/v1.0/users", result.AccessToken, Display);
This MSAL console app tutorial describes getting a token using MSAL (Microsoft Authentication Library) in a .NET console app.
To make a Microsoft Graph call, I replaced the RunAsync() function
with this, which attaches the acquired token to the requests with the
GraphServiceClient:
static async Task RunAsync()
{
const string clientId = "your client id";
string[] scopes = { "User.Read" };
AuthenticationResult result;
var clientApp = new PublicClientApplication(clientId);
try
{
result = await clientApp.AcquireTokenAsync(scopes.Split(new char[] { ' ' }));
Console.WriteLine(result.AccessToken);
GraphServiceClient graphClient = new GraphServiceClient(
new DelegateAuthenticationProvider(
async (requestMessage) =>
{
// Append the access token to the request.
requestMessage.Headers.Authorization = new AuthenticationHeaderValue("bearer", result.AccessToken);
// Some identifying header
requestMessage.Headers.Add("SampleID", "aspnet-connect-sample");
}));
// Get a page of mail from the inbox
var inboxMail = await graphClient.Me.MailFolders.Inbox.Messages.Request().GetAsync();
foreach(var mail in inboxMail.CurrentPage.ToList())
{
Console.Write("From: {0}\nSubject: {1}\nBody:\n{2}\n--------------------\n",
mail.From.EmailAddress.Address, mail.Subject, mail.BodyPreview);
}
}
// Unable to retrieve the access token silently.
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}

not able to get classic web role using Service Principle in Azure

The below code works where the authentication works. But when I try to use Service Principle as authentication the authentication fails.
Working Script:
var context = new AuthenticationContext(azureAdUrl + azureADTenant);
var credential = new UserPasswordCredential(azureUsername, azurePassword);
var authParam = new PlatformParameters(PromptBehavior.RefreshSession, null);
var tokenInfo = context.AcquireTokenAsync("https://management.core.windows.net/", azureADClientId, credential);
TokenCloudCredentials tokencreds = new TokenCloudCredentials(subscriptionId, tokenInfo.Result.AccessToken);
ComputeManagementClient computeClient = new ComputeManagementClient(tokencreds);
string deploymentName = computeClient.Deployments.GetBySlot(serviceName, DeploymentSlot.Production).Name;
string label = computeClient.Deployments.GetBySlot(serviceName, DeploymentSlot.Production).Label;
Not Working:
AuthenticationFailed: The JWT token does not contain expected audience
uri 'https://management.core.windows.net/'.
ClientCredential cc = new ClientCredential(applicationClientID, accessKey);
var context = new AuthenticationContext("https://login.windows.net/" + AzureTenantId);
var tokenInfo = context.AcquireTokenAsync("https://management.azure.com/", cc);
tokenInfo.Wait();
if (tokenInfo == null)
{
throw new InvalidOperationException("Failed to obtain the JWT token");
}
TokenCloudCredentials tokencreds = new TokenCloudCredentials(subscriptionId, tokenInfo.Result.AccessToken);
ComputeManagementClient computeClient = new ComputeManagementClient(tokencreds);
string deploymentName = computeClient.Deployments.GetBySlot(serviceName, DeploymentSlot.Production).Name;
I don't think it is possible to access classic Azure resources using a Service Principal.
Classic Azure resources are managed via Service Management API that does not have any notion of Service Principal. It only supports tokens when the token is obtained for an Administrator or Co-Administrator.
You would need to use username/password of an actual user to work with Service Management API.
According to your code, I tested it on my side and could encounter the same issue as you provided. And Gaurav Mantri has provided the reasonable answer. AFAIK, for classic Azure Services (ASM), you could refer to Authenticate using a management certificate and upload a management API certificate.
Here is my code snippet, you could refer to it:
CertificateCloudCredentials credential = new CertificateCloudCredentials("<subscriptionId>",GetStoreCertificate("<thumbprint>"));
ComputeManagementClient computeClient = new ComputeManagementClient(credential);
string deploymentName = computeClient.Deployments.GetBySlot("<serviceName>", DeploymentSlot.Production).Name;
Result:

How to Create Group/User in Azure Active Directory using ASP.Net (C#)?

I have a requirement to create user or group in azure active directory programmatically. I searched on google and I found multiple solutions like using Graph APIs, C# Code etc.. but I am bit confused with the approach.
Can any one help me out with the difference between these approaches and suggest me the best approach? Please let me know if there are any code samples available.
Thanks in advance !!
Azure ad support multiple protocols. To acquire the token for the Azure AD Graph we need to choose the suitable flow in OAuth 2.0/OpenId connect to interact with Azure AD.
For example, if you were developing a web app the OAuth code grant flow maybe is a good choice. And if the app is daemon app or service application, the client credentials flow the better one. More about the scenarios you can refer this document.
And to acquire the token for Azure AD Graph in a web app, you can refer this code sample. At the line of 104 of this code sample, it acquire the access token for Azure AD Graph. And then in the controller, you can use the code below to acquire the token from cache and create the user using Azure AD Graph:
string graphResourceId = "https://graph.windows.net";
string tenantId = "xxx.onmicrosoft.com";
AuthenticationContext authContext = new AuthenticationContext("https://login.microsoftonline.com/xxx.onmicrosoft.com");
ClientCredential credential = new ClientCredential("{clientId}", "{secret}");
string userObjectID = ClaimsPrincipal.Current.FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier").Value;
AuthenticationResult result = await authContext.AcquireTokenSilentAsync(graphResourceId, credential, new UserIdentifier(userObjectID, UserIdentifierType.UniqueId));
var accessToken = result.AccessToken;
Uri servicePointUri = new Uri(graphResourceId);
Uri serviceRoot = new Uri(servicePointUri, tenantId);
ActiveDirectoryClient graphClient = new ActiveDirectoryClient(serviceRoot, async () => await Task.FromResult(accessToken));
var user = new User();
user.AccountEnabled = true;
user.DisplayName = "testName";
user.UserPrincipalName = "testName#xxx.onmicrosoft.com";
user.MailNickname = "testName";
user.UsageLocation = "US";
user.PasswordProfile = new PasswordProfile
{
Password = "xxxxxx",
ForceChangePasswordNextLogin = true
};
await graphClient.Users.AddUserAsync(user);
And the application requires Directory.ReadWrite.All to create user and group. More detail about the permission you can refer here.

Sending IM with Skype for Business Online from Console App

I am trying to set up a C# console app that can send notifications/reminders to users via Skype for Business online from a generic AD account. I was excited to see the other day that according to this page, UCWA is now supported in Skype for Business online: https://msdn.microsoft.com/en-us/library/office/mt650889.aspx.
I've been trying to follow this tutorial to get this set up: https://msdn.microsoft.com/en-us/library/office/mt590891(v=office.16).aspx. So far I haven't really had much luck... I have my application set up in Azure AD but I get stuck at the "Requesting an access token using implicit grant flow" step of that article (not 100% certain I'm taking the correct actions before that either)... so far I have this:
string clientId = "xxxxxxxx"
string resourceUri = "https://webdir.online.lync.com";
string authorityUri = "https://login.windows.net/common/oauth2/authorize";
AuthenticationContext authContext = new AuthenticationContext(authorityUri);
UserCredential cred = new UserCredential("username", "password");
string token = authContext.AcquireToken(resourceUri, clientId, cred).AccessToken;
var poolReq = CreateRequest("https://webdir.online.lync.com/autodiscover/autodiscoverservice.svc/root", "GET",token);
var poolResp = GetResponse(poolReq);
dynamic tmp = JsonConvert.DeserializeObject(poolResp);
string resourcePool = tmp._links.user.href;
Console.WriteLine(resourcePool);
var accessTokenReq = CreateRequest("https://login.windows.net/common/oauth2/authorize"
+ "?response_type=id_token"
+ "&client_id=" + clientId
+ "&redirect_uri=https://login.live.com/oauth20_desktop.srf"
+ "&state=" + Guid.NewGuid().ToString()
+ "&resource=" + new Uri(resourcePool).Host.ToString()
, "GET",token);
var accessTokenResp = GetResponse(accessTokenReq);
my GetResponse and CreateRequest methods:
public static string GetResponse(HttpWebRequest request)
{
string response = string.Empty;
using (HttpWebResponse httpResponse = request.GetResponse() as System.Net.HttpWebResponse)
{
//Get StreamReader that holds the response stream
using (StreamReader reader = new System.IO.StreamReader(httpResponse.GetResponseStream()))
{
response = reader.ReadToEnd();
}
}
return response;
}
public static HttpWebRequest CreateRequest(string uri, string method, string accessToken)
{
HttpWebRequest request = System.Net.WebRequest.Create(uri) as System.Net.HttpWebRequest;
request.KeepAlive = true;
request.Method = method;
request.ContentLength = 0;
request.ContentType = "application/json";
request.Headers.Add("Authorization", String.Format("Bearer {0}", accessToken));
return request;
}
accessTokenResp is an office online logon page, not the access token I need to move forward... so I'm stuck. I've tried quite a few variations of the above code.
I've been scouring the net for more examples but can't really find any, especially since UCWA support for Office 365 is so new. Does anyone have an example of how to do what I am trying to do or can point me to one? Everything I've found so far hasn't really even been close to what I'm trying. I can't use the Skype for Business client SDK unfortunately either as it doesn't meet all of my requirements.
I came to a working solution using ADAL (v3), with the help of steps outlined at
Authentication using Azure AD
Here the steps, which involve requesting multiple authentication tokens to AAD using ADAL
Register your application, as Native Application, in Azure AD.
Perform autodiscovery to find user's UCWA root resource URI.
This can be done by performing a GET request on
GET https://webdir.online.lync.com/Autodiscover/AutodiscoverService.svc/root?originalDomain=yourdomain.onmicrosoft.com
Request an access token for the UCWA root resource returned in the autodiscovery response, using ADAL
For instance, your root resource will be at
https://webdir0e.online.lync.com/Autodiscover/AutodiscoverService.svc/root/oauth/user?originalDomain=yourdomain.onmicrosoft.com
you'll have to obtain a token from AAD for resource https://webdir0e.online.lync.com/
Perform a GET on the root resource with the bearer token obtained from ADAL
GET https://webdir0e.online.lync.com/Autodiscover/AutodiscoverService.svc/root/oauth/user?originalDomain=yourdomain.onmicrosoft.com
This will return, within the user resource, the URI for applications resource, where to create your UCWA application. This in my case is:
https://webpoolam30e08.infra.lync.com/ucwa/oauth/v1/applications
Residing then in another domain, thus different audience / resource, not included in the auth token previously obatained
Acquire a new token from AAD for the host resource where the home pool and applications resource are (https://webpoolam30e08.infra.lync.com in my case)
Create a new UCWA application by doing a POST on the applications URI, using the token obtained from ADAL
Voilá, your UCWA application is created. What I notice at the moment, is that just few resources are available, excluding me / presence. So users' presence can be retrieved, but self presence status can't be changed.
I've been able however to retrieve my personal note, and the following resources are available to me:
people
communication
meetings
Show me some code:
Function to perform the flow obtaining and switching auth tokens
public static async Task<UcwaApp> Create365UcwaApp(UcwaAppSettings appSettings, Func<string, Task<OAuthToken>> acquireTokenFunc)
{
var result = new UcwaApp();
result.Settings = appSettings;
var rootResource = await result.Discover365RootResourceAsync(appSettings.DomainName);
var userUri = new Uri(rootResource.Resource.GetLinkUri("user"), UriKind.Absolute);
//Acquire a token for the domain where user resource is
var token = await acquireTokenFunc(userUri.GetComponents(UriComponents.SchemeAndServer, UriFormat.SafeUnescaped));
//Set Authorization Header with new token
result.AuthToken = token;
var usersResult = await result.GetUserResource(userUri.ToString());
//
result.ApplicationsUrl = usersResult.Resource.GetLinkUri("applications");
var appsHostUri = new Uri(result.ApplicationsUrl, UriKind.Absolute).GetComponents(UriComponents.SchemeAndServer, UriFormat.SafeUnescaped);
//Acquire a token for the domain where applications resource is
token = await acquireTokenFunc(appsHostUri);
//Set Authorization Header with new token
result.AuthToken = token;
//
var appResult = await result.CreateApplicationAsync(result.ApplicationsUrl, appSettings.ApplicationId, appSettings.UserAgent, appSettings.Culture);
return result;
}
Usage code ato retrieve OAuth tokens using ADAL
var ucSettings = new UcwaAppSettings
{
UserAgent = "Test Console",
Culture = "en-us",
DomainName = "yourdomain.onmicrosoft.com",
ApplicationId = "your app client id"
};
var acquireTokenFunc = new Func<string, Task<OAuthToken>>(async (resourceUri) =>
{
var authContext = new AuthenticationContext("https://login.windows.net/" + ucSettings.DomainName);
var ar = await authContext.AcquireTokenAsync(resourceUri,
ucSettings.ApplicationId,
new UserCredential("myusername", "mypassword"));
return new OAuthToken(ar.AccessTokenType, ar.AccessToken, ar.ExpiresOn.Ticks);
});
var app = await UcwaApp.Create365UcwaApp(ucSettings, acquireTokenFunc);
It should be of course possible to avoid hard-coding username and password using ADAL, but this was easier for PoC and especially in case of Console Application as you asked
I've just blogged about this using a start-to-finish example, hopefully it will help you. I only go as far as signing in, but you can use it with another post I've done on sending IMs using Skype Web SDK here (see day 13 and 14) and combine the two, it should work fine.
-tom
Similar to Massimo's solution, I've created a Skype for Business Online C# based console app that demonstrates how to sign and use UCWA to create/list/delete meetings and change user presence. I haven't gotten around to extending it to send IM's, but you're certainly welcome to clone my repository and extend it to your needs. Just drop in your Azure AD tenant name and native app ID into the code.
I think they just turned this on today - I was doing something unrelated with the Skype Web SDK samples and had to create a new Azure AD app, and noticed that there are two new preview features for receiving conversation updates and changing user information.
Now everything in the Github samples works for Skype For Business Online.

Authorization failure when creating a Stream Analytics job

I've been trying (and failing) to create an Azure Stream Analytics job programatically. I was following this example originally:
https://azure.microsoft.com/en-gb/documentation/articles/stream-analytics-dotnet-management-sdk/
But it pops up a dialog for you to log in. I want to be able to do this server side. It looks like I need to use Azure AD to use the Resource Manager APIs. I've been working my way through this:
https://msdn.microsoft.com/en-us/library/azure/dn790557.aspx#bk_portal
And the code looks like this:
var authContext = new AuthenticationContext("https://login.microsoftonline.com/{tenant id}/oauth2/token");
var clientId = "{app client id}";
var appKey = "{app key}";
var subscriptionId = "{subscription id}";
var clientCredential = new ClientCredential(clientId, appKey);
var result = authContext.AcquireToken("https://management.core.windows.net/", clientCredential);
var creds = new TokenCloudCredentials(subscriptionId, result.AccessToken);
var client = new StreamAnalyticsManagementClient(creds);
var jobCreateParameters = new JobCreateOrUpdateParameters
{
Job = new Job
{
Name = streamAnalyticsJobName,
Location = "North Europe",
Properties = new JobProperties
{
EventsOutOfOrderPolicy = EventsOutOfOrderPolicy.Adjust,
Sku = new Sku
{
Name = "Standard"
}
}
}
};
var jobCreateResponse = client.StreamingJobs.CreateOrUpdate(resourceGroupName, jobCreateParameters);
I can successfully acquire a token, but creating the job fails:
AuthorizationFailed: The client 'REDACTED' with object id 'REDACTED' does not have authorization to perform action 'Microsoft.StreamAnalytics/streamingjobs/write' over scope '/subscriptions/REDACTED/resourcegroups/REDACTED/providers/Microsoft.StreamAnalytics/streamingjobs/REDACTED'
Am I doing something wrong? The app has the delegated permissions set.
UPDATE - 08-Dec-2015
There's an easy way to assign roles to Service Principals now. Please see this link for more details: https://azure.microsoft.com/en-in/documentation/articles/resource-group-create-service-principal-portal/.
Original Response
When you grant access to an application to your Azure subscription, behind the scenes a user is created with Service Principal user type in your Azure AD. The code you're using below assumes that you're using this Service Principal user when getting access token.
var clientCredential = new ClientCredential(clientId, appKey);
var result = authContext.AcquireToken("https://management.core.windows.net/", clientCredential);
var creds = new TokenCloudCredentials(subscriptionId, result.AccessToken);
However by default this user is not granted any permissions (RBAC) on your subscription and that's why you're getting the authorization error.
To solve this problem, what you would need to do is grant appropriate role to this user in your subscription. Now you can use PowerShell to do so or you can do it via code using ADAL library + making some web requests.
What I did was I made use of ADAL library to get access tokens and then used Google Postman (or Fiddler) to do other stuff. In my case, it was a web application. Here's what I did:
I logged in into the application as Global Administrator (Subscription Owner) and got a code. Using that code and ADAL library, I got the access token (let's call it token1).
var authContext = new AuthenticationContext(string.Format("{0}/common", signinEndpoint));//signinEndpoint = https://login.windows.net
var result = await authContext.AcquireTokenByAuthorizationCodeAsync(code, redirectUri, credential);
I copied the tenant id and access token returned to me in result above.
Next thing I did was I found out the object id of the Service Principal user using POSTMAN. This is the GET URL I executed there. For Authorization header, you would need to use Bearer {token1}.
https://graph.windows.net/{subscription-id}/servicePrincipals?api-version=1.5&$filter=appId eq '{app-client-id}'
After that I acquired another access token (let's call it token2) for Service Management API operation using the code below:
authContext = new AuthenticationContext(string.Format("{0}/{1}", signinEndpoint, result.TenantId));
result = await authContext.AcquireTokenSilentAsync(serviceManagementApiEndpoint, credential, new UserIdentifier(request.UserInfo.UniqueId, UserIdentifierType.UniqueId));//serviceManagementApiEndpoint = https://management.core.windows.net/
After that I listed the roles in my subscription and picked the role I wanted to assign to my Service Principal user. In my case, I wanted to assign a Reader role so I noted down the role's id. For Authorization header, you would need to use Bearer {token2}.
https://management.azure.com/subscriptions/{subscription-id}/providers/Microsoft.Authorization/roleDefinitions?api-version=2015-06-01
Next is assignment of this role to the user. For this I created a guid as role assignment id and used the following URL:
https://management.azure.com/subscriptions/{subscription-id}/providers/microsoft.authorization/roleassignments/{role-assignment-id}?api-version=2015-06-01
It's going to be a PUT request and this was the request body would be something like:
{
"properties":
{
"roleDefinitionId": "{role id of the selected role from step 5}",
"principalId": "{id of the service principal from step 3"
}
}
Please ensure that the content-type of the request is set as application/json;odata=verbose and not application/json.
That's pretty much it! After that your code should work just fine :)
Give it a try and see what happens.

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