Azure物聯網RegistryManager，塊重複使用證書

Question

我試圖找到它是否有可能使用RegistryManager使它不註冊設備，如果證書的指紋已被其他設備使用。

_registryManager = RegistryManager.CreateFromConnectionString(_connectionString); 
      Microsoft.Azure.Devices.Device device; 

      try 
      { 
       Console.WriteLine("Registering Device using X.509 certificate for authentication"); 
       device = await _registryManager.AddDeviceAsync(new Microsoft.Azure.Devices.Device(deviceId) 
       { 
        Authentication = new AuthenticationMechanism() 
        { 
         X509Thumbprint = new X509Thumbprint() 
         { 
          PrimaryThumbprint = certificate2.Thumbprint 
         } 
        } 
       }).ConfigureAwait(false); 
      } 

所以，如果上面的代碼被調用，另一個設備有指紋，我希望它失敗。或者，我希望能夠查看所有現有的指紋，以便在註冊之前手動檢查。

我看不到通過RegistryManager執行此操作的任何方法。

Answer 1

或者我希望能夠查看所有現有的指紋，因此我 可以在註冊之前手動檢查。

可以得到現有的指紋這樣的：

 var _registryManager = RegistryManager.CreateFromConnectionString(_connectionString); 
     var devices = await _registryManager.GetDevicesAsync(100); //Here I use 100 for testing purpose. Replace this value with yours. 
     foreach (var dev in devices) 
     { 
      if (dev.Authentication.X509Thumbprint.IsValid(false)) 
      { 
       var primaryThumbprint = dev.Authentication.X509Thumbprint.PrimaryThumbprint; 
       var secondaryThumbprint = dev.Authentication.X509Thumbprint.SecondaryThumbprint; 
       Console.WriteLine("primaryThumbprint:" + primaryThumbprint); 
       Console.WriteLine("SecondaryThumbprint:" + SecondaryThumbprint); 
      } 
     }