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Java

Enumerate Server-Advertised Acceptable Client CAs

See more Socket/SSL/TLS Examples

Demonstrates Socket.GetSslAcceptableClientCaDn, which returns a certificate-authority distinguished name advertised by a TLS server when it requests a client certificate.

Background. Valid indexes range from 0 through NumSslAcceptableClientCAs minus one. A client can use these names to select an appropriate client certificate.

Chilkat Java Downloads

Java
import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkSocket socket = new CkSocket();

    //  Connect to the server using TLS.
    boolean bTls = true;
    int maxWaitMs = 5000;
    success = socket.Connect("example.com",5000,bTls,maxWaitMs);
    if (success == false) {
        System.out.println(socket.lastErrorText());
        return;
        }

    //  After connecting to a server that requests a client certificate, enumerate the certificate-
    //  authority distinguished names the server advertised as acceptable.
    int numCAs = socket.get_NumSslAcceptableClientCAs();
    int i;
    for (i = 0; i <= numCAs - 1; i++) {
        String caDn = socket.getSslAcceptableClientCaDn(i);
        if (socket.get_LastMethodSuccess() == false) {
            System.out.println(socket.lastErrorText());
            return;
            }

        System.out.println(caDn);
        }
  }
}