使用證書認證調用Azure資源率API時獲取403

Question

我試圖創建一個控制檯應用程序，該應用程序可以使用證書認證調用Azure Resource Rate API。爲此，我使用了以下分支GitHub link。

我得到了403錯誤。我已將Web應用程序添加到我的Azure AD。在清單中，我從使用以下PowerShell命令簽署的證書中複製了密鑰憑證;

$cert=New-SelfSignedCertificate -Subject "CN=RateCardCert" 
-CertStoreLocation "Cert:\CurrentUser\My" -KeyExportPolicy Exportable -KeySpec Signature 
$bin = $cert.RawData $base64Value = [System.Convert]::ToBase64String($bin) 
$bin = $cert.GetCertHash() 
$base64Thumbprint = [System.Convert]::ToBase64String($bin) 
$keyid = [System.Guid]::NewGuid().ToString() 
$jsonObj = @ customKeyIdentifier=$base64Thumbprint;keyId=$keyid;type="AsymmetricX509Cert";usage="Verify";value=$base64Value} 
$keyCredentials=ConvertTo-Json @($jsonObj) | Out-File "keyCredentials.txt" 

在控制檯應用程序中，我使用以下函數來獲取令牌;

public static string GetOAuthTokenFromAAD_ByCertificate(string TenanatID, string ClientID, string CertificateName) 
    { 
     //Creating the Authentication Context 
     var authContext = new AuthenticationContext(string.Format("https://login.windows.net/{0}", TenanatID)); 
     //Console.WriteLine("new authContext made"); 
     //Creating the certificate object. This will be used to authenticate 
     X509Certificate2 cert = null; 
     //Console.WriteLine("empty 'cert' made, null"); 
     //The Certificate should be already installed in personal store of the current user under 
     //the context of which the application is running. 
     X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser); 


     try 
     { 
      //Trying to open and fetch the certificate 
      store.Open(OpenFlags.ReadOnly); 
      var certCollection = store.Certificates; 
      var certs = certCollection.Find(X509FindType.FindBySubjectName, CertificateName, false); 
      //Checking if certificate found 
      if (certs == null || certs.Count <= 0) 
      { 
       //Throwing error if certificate not found 
       throw new Exception("Certificate " + CertificateName + " not found."); 
      } 
      cert = certs[0]; 
     } 
     finally 
     { 
      //Closing the certificate store 
      store.Close(); 
     } 

     //Creating Client Assertion Certificate object 
     var certCred = new ClientAssertionCertificate(ClientID, cert); 

     //Fetching the actual token for authentication of every request from Azure using the certificate 
     var token = authContext.AcquireToken("https://management.core.windows.net/", certCred); 

     //Optional steps if you need more than just a token from Azure AD 
     //var creds = new TokenCloudCredentials(subscriptionId, token.AccessToken); 
     //var client = new ResourceManagementClient(creds); 

     //Returning the token 
     return token.AccessToken; 
    } 

這是使該URL和請求提出（該XXXX部分由我在天青AD所註冊的web應用程序的客戶端ID的替換）的代碼的一部分;

//Get the AAD User token to get authorized to make the call to the Usage API 
     string token = GetOAuthTokenFromAAD_ByCertificate("<MyTenantName.onmicrosoft.com", "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "RateCardCert"); 


      // Build up the HttpWebRequest 
     string requestURL = String.Format("{0}/{1}/{2}/{3}", 
        ConfigurationManager.AppSettings["ARMBillingServiceURL"], 
        "subscriptions", 
        ConfigurationManager.AppSettings["SubscriptionID"], 
        "providers/Microsoft.Commerce/RateCard?api-version=2015-06-01-preview&$filter=OfferDurableId eq 'MS-AZR-0044P' and Currency eq 'EUR' and Locale eq 'nl-NL' and RegionInfo eq 'NL'"); 
     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestURL); 

     // Add the OAuth Authorization header, and Content Type header 
     request.Headers.Add(HttpRequestHeader.Authorization, "Bearer " + token); 
     request.ContentType = "application/json"; 

     // Call the RateCard API, dump the output to the console window 
     try 
     { 
      // Call the REST endpoint 
      Console.WriteLine("Calling RateCard service..."); 
      HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
      Console.WriteLine(String.Format("RateCard service response status: {0}", response.StatusDescription)); 
      Stream receiveStream = response.GetResponseStream(); 

      // Pipes the stream to a higher level stream reader with the required encoding format. 
      StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8); 
      var rateCardResponse = readStream.ReadToEnd(); 
      Console.WriteLine("RateCard stream received. Press ENTER to continue with raw output."); 
      Console.ReadLine(); 
      Console.WriteLine(rateCardResponse); 
      Console.WriteLine("Raw output complete. Press ENTER to continue with JSON output."); 
      Console.ReadLine(); 

      // Convert the Stream to a strongly typed RateCardPayload object. 
      // You can also walk through this object to manipulate the individuals member objects. 
      RateCardPayload payload = JsonConvert.DeserializeObject<RateCardPayload>(rateCardResponse); 

      Console.WriteLine(rateCardResponse.ToString()); 
      response.Close(); 
      readStream.Close(); 
      Console.WriteLine("JSON output complete. Press ENTER to close."); 
      Console.ReadLine(); 
     } 
     catch(Exception e) 
     { 
      Console.WriteLine(String.Format("{0} \n\n{1}", e.Message, e.InnerException != null ? e.InnerException.Message : "")); 
      Console.ReadLine(); 
     } 

我只是不知道我有什麼做了，我錯過這裏？

控制檯的全部回報是：

Calling RateCard Service... The remote server returned an error: (403) Forbidden.

Answer 1

在評論聊天后發現問題：

您所呼叫的Azure的資源管理API，但你只能在Azure中給權限服務管理API。您需要將應用的服務主體添加到訂閱中的某個角色。找到您的訂閱，然後找到訪問控制（IAM）刀片，然後將您的應用添加到那裏的角色。你應該能夠找到它的名字。

如果您想限制其功能，您還可以將服務主體添加到資源組上的角色或甚至特定資源。