QuickOPC User's Guide and Reference
GetCertificateStatus Method (IEasyUACertificateManagementClient)
Example 



OpcLabs.EasyOpcUA Assembly > OpcLabs.EasyOpc.UA.Gds Namespace > IEasyUACertificateManagementClient Interface : GetCertificateStatus Method
Endpoint descriptor. Identifies the OPC-UA server. The server must be a Global Directory Server (GDS).
The identifier assigned to the Application Instance by the GDS.
The NodeId of the Certificate Group which provides the context.
If OpcLabs.EasyOpc.UA.AddressSpace.UANodeId.Null the CertificateManager shall choose the DefaultApplicationGroup.
The NodeId of the CertificateType for the Certificate.
If OpcLabs.EasyOpc.UA.AddressSpace.UANodeId.Null the CertificateManager shall select a Certificate based on the value of the certificateGroupId argument.
Checks if an application needs to update its certificate.
Syntax
'Declaration
 
Function GetCertificateStatus( _
   ByVal gdsEndpointDescriptor As UAEndpointDescriptor, _
   ByVal applicationId As UANodeId, _
   ByVal certificateGroupId As UANodeId, _
   ByVal certificateTypeId As UANodeId _
) As Boolean
'Usage
 
Dim instance As IEasyUACertificateManagementClient
Dim gdsEndpointDescriptor As UAEndpointDescriptor
Dim applicationId As UANodeId
Dim certificateGroupId As UANodeId
Dim certificateTypeId As UANodeId
Dim value As Boolean
 
value = instance.GetCertificateStatus(gdsEndpointDescriptor, applicationId, certificateGroupId, certificateTypeId)

Parameters

gdsEndpointDescriptor
Endpoint descriptor. Identifies the OPC-UA server. The server must be a Global Directory Server (GDS).
applicationId
The identifier assigned to the Application Instance by the GDS.
certificateGroupId
The NodeId of the Certificate Group which provides the context.
If OpcLabs.EasyOpc.UA.AddressSpace.UANodeId.Null the CertificateManager shall choose the DefaultApplicationGroup.
certificateTypeId
The NodeId of the CertificateType for the Certificate.
If OpcLabs.EasyOpc.UA.AddressSpace.UANodeId.Null the CertificateManager shall select a Certificate based on the value of the certificateGroupId argument.

Return Value

Returns true if the Application needs to request a new Certificate from the GDS.
Returns false if the Application can keep using the existing Certificate.
Example
// Shows how to check if an application needs to update its certificate.

using System;
using Microsoft.Extensions.DependencyInjection;
using OpcLabs.EasyOpc.UA;
using OpcLabs.EasyOpc.UA.AddressSpace;
using OpcLabs.EasyOpc.UA.Application;
using OpcLabs.EasyOpc.UA.Extensions;
using OpcLabs.EasyOpc.UA.Gds;
using OpcLabs.EasyOpc.UA.OperationModel;

namespace UADocExamples.Gds._EasyUACertificateManagementClient
{
    class GetCertificateStatus
    {
        public static void Main1()
        {
            // Define which GDS we will work with.
            UAEndpointDescriptor gdsEndpointDescriptor = 
                ((UAEndpointDescriptor)"opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer")
                .WithUserNameIdentity("appadmin", "demo");

            // Register our client application with the GDS, so that we obtain an application ID that we need later.
            var client = new EasyUAClient();
            IEasyUAClientApplication clientApplication = client.GetService<IEasyUAClientApplication>();
            UANodeId applicationId;
            try
            {
                applicationId = clientApplication.RegisterToGds(gdsEndpointDescriptor);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }
            Console.WriteLine("Application ID: {0}", applicationId);

            // Instantiate the certificate management client object
            var certificateManagementClient = new EasyUACertificateManagementClient();

            // Check if the application needs to update its certificate.
            bool updateRequired;
            try
            {
                updateRequired = certificateManagementClient.GetCertificateStatus(gdsEndpointDescriptor, applicationId,
                    UANodeId.Null, UANodeId.Null);
            }
            catch (UAException uaException)
            {
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException().Message);
                return;
            }

            // Display results
            Console.WriteLine("Update required: {0}", updateRequired);
        }


        // Example output:
        //Application ID: nsu=http://opcfoundation.org/UA/GDS/applications/ ;ns=2;g=aec94459-f513-4979-8619-8383555fca61
        //Update required: False
    }
}
// Shows how to check if an application needs to update its certificate.

class procedure GetCertificateStatus.Main;
var
  ApplicationId: _UANodeId;
  CertificateManagementClient: OpcLabs_EasyOpcUA_TLB._EasyUACertificateManagementClient;
  Client: _EasyUAClient;
  ClientApplication: _EasyUAClientApplication;
  GdsEndpointDescriptor: _UAEndpointDescriptor;
  NullNodeId: _UANodeId;
  UpdateRequired: boolean;
begin
  // Define which GDS we will work with.
  GdsEndpointDescriptor := CoUAEndpointDescriptor.Create;
  GdsEndpointDescriptor.UrlString := 'opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer';
  GdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.UserName := 'appadmin';
  GdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.Password := 'demo';

  // Register our client application with the GDS, so that we obtain an application ID that we need later.
  Client := CoEasyUAClient.Create;
  ClientApplication := IInterface(Client.GetServiceByName('OpcLabs.EasyOpc.UA.Application.IEasyUAClientApplication, OpcLabs.EasyOpcUA')) as _EasyUAClientApplication;

  // Create an application registration in the GDS, assigning it a new application ID.
  try
    ApplicationId := ClientApplication.RegisterToGds(GdsEndpointDescriptor);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
    end;
  end;

  WriteLn('Application ID: ', ApplicationId.ToString);

  // Instantiate the certificate management client object
  CertificateManagementClient := CoEasyUACertificateManagementClient.Create;

  // Check if the application needs to update its certificate.
  NullNodeId := CoUANodeId.Create;
  UpdateRequired := false;
  try
    UpdateRequired := CertificateManagementClient.GetCertificateStatus(GdsEndpointDescriptor, ApplicationId, NullNodeId, NullNodeId);
  except
    on E: EOleException do
    begin
      WriteLn(Format('*** Failure: %s', [E.GetBaseException.Message]));
    end;
  end;

  // Display results
  WriteLn('Update required: ', UpdateRequired);

  // Example output:
  //Application ID: nsu=http://opcfoundation.org/UA/GDS/applications/ ;ns=2;g=aec94459-f513-4979-8619-8383555fca61
  //Update required: FALSE

end;
' Shows how to check if an application needs to update its certificate.

Imports Microsoft.Extensions.DependencyInjection
Imports OpcLabs.EasyOpc.UA
Imports OpcLabs.EasyOpc.UA.AddressSpace
Imports OpcLabs.EasyOpc.UA.Application
Imports OpcLabs.EasyOpc.UA.Extensions
Imports OpcLabs.EasyOpc.UA.Gds
Imports OpcLabs.EasyOpc.UA.OperationModel

Namespace UADocExamples.Gds._EasyUACertificateManagementClient
    Friend Class GetCertificateStatus
        Public Shared Sub Main1()

            ' Define which GDS we will work with.
            Dim gdsEndpointDescriptor As UAEndpointDescriptor =
                New UAEndpointDescriptor("opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer") _
                .WithUserNameIdentity("appadmin", "demo")

            ' Register our client application with the GDS, so that we obtain an application ID that we need later.
            Dim client = New EasyUAClient()
            Dim clientApplication = client.GetService(Of IEasyUAClientApplication)()

            ' Create an application registration in the GDS, assigning it a new application ID.
            Dim applicationId As UANodeId
            Try
                applicationId = clientApplication.RegisterToGds(gdsEndpointDescriptor)
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Instantiate the certificate management client object
            Dim certificateManagementClient = New EasyUACertificateManagementClient()

            ' Check if the application needs to update its certificate.
            Dim updateRequired As Boolean
            Try
                updateRequired = certificateManagementClient.GetCertificateStatus(gdsEndpointDescriptor, applicationId,
                    UANodeId.Null, UANodeId.Null)
            Catch uaException As UAException
                Console.WriteLine("*** Failure: {0}", uaException.GetBaseException.Message)
                Exit Sub
            End Try

            ' Display results
            Console.WriteLine("Update required: {0}", updateRequired)
        End Sub
    End Class
End Namespace
Rem Shows how to check if an application needs to update its certificate.

Option Explicit

' Define which GDS we will work with.
Dim GdsEndpointDescriptor: Set GdsEndpointDescriptor = CreateObject("OpcLabs.EasyOpc.UA.UAEndpointDescriptor")
GdsEndpointDescriptor.UrlString = "opc.tcp://opcua.demo-this.com:58810/GlobalDiscoveryServer"
GdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.UserName = "appadmin"
GdsEndpointDescriptor.UserIdentity.UserNameTokenInfo.Password = "demo"

' Register our client application with the GDS, so that we obtain an application ID that we need later.
Dim Client: Set Client = CreateObject("OpcLabs.EasyOpc.UA.EasyUAClient")
Dim ClientApplication: Set ClientApplication = _
    Client.GetServiceByName("OpcLabs.EasyOpc.UA.Application.IEasyUAClientApplication, OpcLabs.EasyOpcUA")
On Error Resume Next
Dim ApplicationId: Set ApplicationId = ClientApplication.RegisterToGds(GdsEndpointDescriptor)
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0
WScript.Echo "Application ID: " & ApplicationId

' Instantiate the certificate management client object
Dim CertificateManagementClient: Set CertificateManagementClient = _
    CreateObject("OpcLabs.EasyOpc.UA.Gds.EasyUACertificateManagementClient")

' Check if the application needs to update its certificate.
Dim NullNodeId: Set NullNodeId = CreateObject("OpcLabs.EasyOpc.UA.AddressSpace.UANodeId")
On Error Resume Next
Dim UpdateRequired: UpdateRequired = CertificateManagementClient.GetCertificateStatus( _
    GdsEndpointDescriptor, ApplicationId, NullNodeId, NullNodeId)
If Err.Number <> 0 Then
    WScript.Echo "*** Failure: " & Err.Source & ": " & Err.Description
    WScript.Quit
End If
On Error Goto 0

' Display results
WScript.Echo "Update required: " & UpdateRequired


' Example output:
'Application ID: nsu=http://opcfoundation.org/UA/GDS/applications/ ;ns=2;g=aec94459-f513-4979-8619-8383555fca61
'Update required: False
Requirements

Target Platforms: .NET Framework: Windows 10, Windows Server 2012; .NET Core: Linux, macOS, Microsoft Windows

See Also

Reference

IEasyUACertificateManagementClient Interface
IEasyUACertificateManagementClient Members