private void CertificateImpersonateBTN_Click(object sender, EventArgs e)
{
if (m_session == null)
{
return;
}
try
{
// load the certficate.
X509Certificate2 certificate = new X509Certificate2(
CertificateTB.Text,
CertificatePasswordTB.Text,
X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.Exportable);
// want to get error text for this call.
m_session.ReturnDiagnostics = DiagnosticsMasks.All;
UserIdentity identity = new UserIdentity(certificate);
string[] preferredLocales = PreferredLocalesTB.Text.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
m_session.UpdateSession(identity, preferredLocales);
MessageBox.Show("User identity changed.", "Impersonate User", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
finally
{
m_session.ReturnDiagnostics = DiagnosticsMasks.None;
}
}
private void OkBTN_Click(object sender, EventArgs e)
{
try
{
#region Task #D3 - Change Locale and User Identity
UserIdentity identity = null;
// use the anonymous identity of the user name is not provided.
if (String.IsNullOrEmpty(UserNameTB.Text))
{
identity = new UserIdentity();
}
// could add check for domain name in user name and use a kerberos token instead.
else
{
identity = new UserIdentity(UserNameTB.Text, PasswordTB.Text);
}
// can specify multiple locales but just use one here to keep the UI simple.
StringCollection preferredLocales = new StringCollection();
preferredLocales.Add(LocaleCB.SelectedItem as string);
// override the default diagnostics to get error messages.
DiagnosticsMasks returnDiagnostics = m_session.ReturnDiagnostics;
try
{
// update the session.
m_session.ReturnDiagnostics = DiagnosticsMasks.ServiceSymbolicIdAndText;
m_session.UpdateSession(identity, preferredLocales);
}
finally
{
m_session.ReturnDiagnostics = returnDiagnostics;
}
#endregion
DialogResult = DialogResult.OK;
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
private void UserNameImpersonateBTN_Click(object sender, EventArgs e)
{
if (m_session == null)
{
return;
}
try
{
// want to get error text for this call.
m_session.ReturnDiagnostics = DiagnosticsMasks.All;
UserIdentity identity = new UserIdentity(UserNameTB.Text, PasswordTB.Text);
string[] preferredLocales = PreferredLocalesTB.Text.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
m_session.UpdateSession(identity, preferredLocales);
MessageBox.Show("User identity changed.", "Impersonate User", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
finally
{
m_session.ReturnDiagnostics = DiagnosticsMasks.None;
}
}
/// <summary>
/// Creates a new session.
/// </summary>
private Session CreateSession(Guid clsid)
{
// lookup the cached configuration information.
ConfiguredEndpoint endpoint = null;
bool previouslyConnected = true;
if (!m_verifiedEndpoints.TryGetValue(clsid, out endpoint))
{
endpoint = LoadConfiguredEndpoint(clsid);
if (endpoint != null)
{
Utils.Trace("Loaded endpoint with URL: {0}", endpoint.EndpointUrl);
previouslyConnected = false;
}
}
if (endpoint == null)
{
endpoint = m_endpointCache.Create(DefaultServerUrl);
}
// Initialize the client configuration.
// Fetch the current configuration information by connecting to the server's discovery endpoint.
// This method assumes that the discovery endpoint can be constructed by appending "/discovery" to the URL.
if (endpoint.UpdateBeforeConnect && !previouslyConnected)
{
endpoint.UpdateFromServer(BindingFactory.Default);
Utils.Trace("Updated endpoint from server: {0}", endpoint.EndpointUrl);
}
// Need to specify that the server is trusted by the client application.
if (!previouslyConnected)
{
m_configuration.SecurityConfiguration.AddTrustedPeer(endpoint.Description.ServerCertificate);
}
// Set the session keep alive to 600 seconds.
m_configuration.ClientConfiguration.DefaultSessionTimeout = 600000;
ServiceMessageContext messageContext = m_configuration.CreateMessageContext();
// Initialize the channel which will be created with the server.
ITransportChannel channel = SessionChannel.Create(
m_configuration,
endpoint.Description,
endpoint.Configuration,
m_configuration.SecurityConfiguration.ApplicationCertificate.Find(true),
messageContext);
// Wrap the channel with the session object.
Session session = new Session(channel, m_configuration, endpoint, null);
session.ReturnDiagnostics = DiagnosticsMasks.SymbolicId;
// The user login credentials must be provided when opening a session.
IUserIdentity identity = null;
if (endpoint.UserIdentity != null)
{
identity = new Opc.Ua.UserIdentity(endpoint.UserIdentity);
}
// Create the session. This actually connects to the server.
session.Open("COM Client Session", identity);
// need to fetch the references in order use the node cache.
session.FetchTypeTree(ReferenceTypeIds.References);
// save the updated information.
if (!previouslyConnected)
{
try
{
SaveConfiguredEndpoint(clsid, endpoint);
}
catch (Exception e)
{
Utils.Trace(e, "Could not save SaveConfiguredEndpoint in registry.");
}
m_verifiedEndpoints.Add(clsid, endpoint);
}
return session;
}
