Dart Requires Chilkat v11.0.0+

Examine SSL/TLS Server Certificate

See more Socket/SSL/TLS Examples

Demonstrates how an application can examine and check a server's SSL/TLS certificate. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final socket = CkSocket();

  // Connect to a server.
  final useTls = true;
  final maxWaitMs = 2000;
  try {
    socket.connect('www.intel.com', 443, useTls, maxWaitMs);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // If we get here, the TLS connection ws made..
  // In any SSL/TLS handshake, the server sends its certificate in a TLS handshake message.
  // Chilkat will keep it cached within the object that made the connection.
  // Get the server's cert and examine a few things.
  final cert = CkCert();
  socket.getServerCert(cert);

  print('Distinguished Name: ${cert.subjectDN}');
  print('Common Name: ${cert.subjectCN}');
  print('Issuer Distinguished Name: ${cert.issuerDN}');
  print('Issuer Common Name: ${cert.issuerCN}');

  print('Expired: ${cert.expired}');
  print('Revoked: ${cert.revoked}');
  print('Signature Verified: ${cert.signatureVerified}');
  print('Trusted Root: ${cert.trustedRoot}');

  // Sample output:

  // Distinguished Name: C=US, ST=California, O=Intel Corporation, CN=*.intel.com
  // Common Name: *.intel.com
  // Issuer Distinguished Name: C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Organization Validation Secure Server CA
  // Issuer Common Name: Sectigo RSA Organization Validation Secure Server CA
  // Expired: False
  // Revoked: False
  // Signature Verified: True
  // Trusted Root: True
}