Skip to content

Remove localhost restriction from LDS registration certificate validation #3352

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
marcschier merged 4 commits into from
Dec 1, 2025
Merged

Remove localhost restriction from LDS registration certificate validation #3352

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
ac23669
Initial plan
Copilot Nov 22, 2025
9025852
Remove localhost restriction from LDS registration certificate valida…
Copilot Nov 22, 2025
ba3edfe
Fix code indentation after removing try block
Copilot Nov 22, 2025
54e3217
Use configuration.ApplicationUri instead of null in UpdateAsync
Copilot Nov 27, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
49 changes: 7 additions & 42 deletions Libraries/Opc.Ua.Server/Server/StandardServer.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2436,24 +2436,18 @@ public async ValueTask<bool> RegisterWithDiscoveryServerAsync(CancellationToken
var configuration = new ApplicationConfiguration(Configuration);

// use a dedicated certificate validator with the registration, but derive behavior from server config
var registrationCertificateValidator = new CertificateValidationEventHandler(
RegistrationValidator_CertificateValidation);
configuration.CertificateValidator = new CertificateValidator(MessageContext.Telemetry);
configuration.CertificateValidator.CertificateValidation
+= registrationCertificateValidator;
await configuration
.CertificateValidator.UpdateAsync(
configuration.SecurityConfiguration,
applicationUri: null,
configuration.ApplicationUri,
ct)
.ConfigureAwait(false);

try
// try each endpoint.
if (m_registrationEndpoints != null)
{
// try each endpoint.
if (m_registrationEndpoints != null)
{
foreach (ConfiguredEndpoint endpoint in m_registrationEndpoints.Endpoints)
foreach (ConfiguredEndpoint endpoint in m_registrationEndpoints.Endpoints)
{
RegistrationClient client = null;
int i = 0;
Expand Down Expand Up @@ -2557,43 +2551,14 @@ await client.RegisterServerAsync(
}
}
}
// retry to start with RegisterServer2 if both failed
m_useRegisterServer2 = true;
}
}
finally
{
configuration.CertificateValidator.CertificateValidation -= registrationCertificateValidator;
// retry to start with RegisterServer2 if both failed
m_useRegisterServer2 = true;
}

m_registeredWithDiscoveryServer = false;
return false;
}

/// <summary>
/// Checks that the domains in the certificate match the current host.
/// </summary>
private void RegistrationValidator_CertificateValidation(
CertificateValidator sender,
CertificateValidationEventArgs e)
{
System.Net.IPAddress[] targetAddresses = Utils.GetHostAddresses(Utils.GetHostName());

foreach (string domain in X509Utils.GetDomainsFromCertificate(e.Certificate))
{
foreach (System.Net.IPAddress actualAddress in Utils.GetHostAddresses(domain))
{
foreach (System.Net.IPAddress targetAddress in targetAddresses)
{
if (targetAddress.Equals(actualAddress))
{
e.Accept = true;
return;
}
}
}
}
}

/// <summary>
/// Registers the server endpoints with the LDS.
/// </summary>
Expand Down
Loading