Retrieve certificates from secure context

[Juanjo]

Hi.

I've a secure Tomcat web server and I would like to retrieve the context
certificates when my application connects to the server.
In my servlet I've the following capture:

  for(Enumeration enum = request.getAttributeName(); enum.hasMoreElements() ;)
    System.out.println("Attribute: " + enum.nextElement());
In my console I obtain:

  Attribute: javax.servlet.request.cipher_suite
  Attribute: javax.servlet.request.key_size
but I haven't the certificates that it establishes the secure context.

How can I retrieve these certificates??

Regards and thanks in advance.

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My application where I open HttpsURLConnection (class of IAIK):

  System.getProperties().put("java.protocol.handler.pkgs","iaik.protocol");

  SSLClientContext context = new SSLClientContext();
  context.setEnabledCipherSuites(<ciphers>);
  X509Certificate server = <server certificate>;
  X509Certificate ra = <RA certificate>;
  X509Certificate[] chain = X509Certificate[1];
  chain[0] = ra;
  context.addClientCredentials(chain,<RA private key>);
  context.addTrustedCertificate(server);
  HttpsURLConnection https = new HttpsURLConnection(new URL(<servlet URL>));
  https.setSSLContext(context);
  https.setRequestMethod(POST);