Intercept SSL/TLS requests in HTTPS Grizzly server - ssl

Question

I have set up an HTTPS server using grizzly 2.3.30 and jersey 2.25.1, which can be found here.
The server works well and I can curl to it with certificate-authority, certificate and key:
curl -v --cacert $CERTS/myCA.pem --key $CERTS/grizzly.key --cert $CERTS/grizzly.crt https://localhost:9999/hello
I want to intercept TLS/SSL requests, so I can log which ones fail like for example:
curl -v https://localhost:9999/hello
I am using Grizzly Http Server Framework with Jersey in this fashion:
public class MyGrizzlyServer {
public static void main(String[] args) throws Exception {
System.out.println("Hello main!");
String uriStr = "https://0.0.0.0:9999/";
URI uri = URI.create(uriStr);
final ResourceConfig rc = new ResourceConfig().packages("org");
HttpServer server = GrizzlyHttpServerFactory.createHttpServer(uri, rc, false);
SSLEngineConfigurator engineConfig = getSslEngineConfig();
for (NetworkListener listener : server.getListeners()) {
listener.setSecure(true);
listener.setSSLEngineConfig(engineConfig);
}
HttpHandler handler = server.getHttpHandler();
System.out.println("Http server start...");
server.start();
System.out.println("Hit enter to stop it...");
System.in.read();
server.shutdownNow();
}
private static SSLEngineConfigurator getSslEngineConfig() {
SSLContextConfigurator sslConfigurator = new SSLContextConfigurator();
sslConfigurator.setKeyStoreFile("./mycerts/grizzly.jks");
sslConfigurator.setKeyStorePass("awesome");
sslConfigurator.setTrustStoreFile("./mycerts/myCA.jks");
sslConfigurator.setTrustStorePass("mycapass");
sslConfigurator.setSecurityProtocol("TLS");
SSLContext context = sslConfigurator.createSSLContext(true);
SSLEngineConfigurator sslEngineConfigurator = new SSLEngineConfigurator(context);
sslEngineConfigurator.setNeedClientAuth(true);
sslEngineConfigurator.setClientMode(false);
return sslEngineConfigurator;
}
}
I have been reading Grizzly documentation to get familiarized with its internals.
Grizzly seems to pile filter chains for transport, ssl, http, etc.
I am experimenting with this, but haven't figured out how to achieve it yet.
Any hint will be appreciated.

Answer 1

After playing a bit with filter chains, I was able to remove default SSLBaseFilter and add a custom SSL Filter inherited from SSLBaseFilter.
That way I could captured exceptions thrown by failed TLS/SSL requests.
In MyGrizzlyServer server:
server.start();
NetworkListener listener = server.getListener("grizzly");
FilterChain filterChain = listener.getFilterChain();
int sslBaseFilterIndex = filterChain.indexOfType(SSLBaseFilter.class);
filterChain.remove(sslBaseFilterIndex);
MySslFilter sslFilter = new MySslFilter(sslEngineConfig);
filterChain.add(sslBaseFilterIndex, sslFilter);
With custom SSL filter:
public class MySslFilter extends SSLBaseFilter {
MySslFilter(SSLEngineConfigurator configurator) {
super(configurator);
}
#Override
public NextAction handleRead(FilterChainContext ctx) throws IOException {
NextAction nextAction = null;
try {
System.out.println(" *** MySslFilter handleRead ***" );
nextAction = super.handleRead(ctx);
} catch (IOException e) {
System.out.println(" *** MySslFilter Exception ***" );
e.printStackTrace();
}
return nextAction;
}
}