Question

I’m trying to implement simplest HTTPS communication program. There are a lot of examples on the web, but I fail to run them successfully.
Here is one example:

public class ReadHttpsURL1 {
   static final int HTTPS_PORT = 443; 

   public static void main(String argv[]) throws Exception {
       String url = "www.sun.com";
       System.setProperty("java.net.useSystemProxies", "true");

      SocketFactory factory = SSLSocketFactory.getDefault(); 

      Socket socket = factory.createSocket(url, HTTPS_PORT); 

      BufferedWriter out = new BufferedWriter(new 
            OutputStreamWriter(socket.getOutputStream()));
      BufferedReader in = new BufferedReader(
        new InputStreamReader(socket.getInputStream()));
      out.write("GET / HTTP/1.0\n\n");
      out.flush();

      String line;
      StringBuffer sb = new StringBuffer();
      while((line = in.readLine()) != null) {
         sb.append(line);
      }
      out.close();
      in.close();
      System.out.println(sb.toString());
   }
}

It hangs up for a time about a minute (I believe due to server-side timeout) and fail with error. Hangs up on

Socket socket = factory.createSocket(url, HTTPS_PORT); 

Error is

Exception in thread "main" java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at java.net.SocksSocketImpl.readSocksReply(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.<init>(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketFactoryImpl.createSocket(Unknown Source)
    at com.sun.ex1.ReadHttpsURL1.main(ReadHttpsURL1.java:20)

Here is second example:

public class HttpsTest {

    public static void main(String[] args) throws MalformedURLException, IOException {
        System.setProperty("java.net.useSystemProxies", "true");

        URL url = new URL("https://www.sun.com");
        URLConnection con = url.openConnection();
        con.setAllowUserInteraction(true);
        InputStream is = new BufferedInputStream(con.getInputStream());
        for (int b = is.read(); b >= 0; b = is.read()) {
            System.out.write(b);
        }
    }
}

Just throw this exception:

Exception in thread "main" javax.net.ssl.SSLKeyException: RSA premaster secret error
    at com.sun.net.ssl.internal.ssl.RSAClientKeyExchange.<init>(Unknown Source)
    at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverHelloDone(Unknown Source)
    at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)
    at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)
    at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at HttpsTest.main(HttpsTest.java:16)
Caused by: java.security.NoSuchAlgorithmException: SunTlsRsaPremasterSecret KeyGenerator not available
    at javax.crypto.KeyGenerator.<init>(DashoA13*..)
    at javax.crypto.KeyGenerator.getInstance(DashoA13*..)
    at com.sun.net.ssl.internal.ssl.JsseJce.getKeyGenerator(Unknown Source)
    ... 14 more

I’ve read a bit about NoSuchAlgorithmException. This seems to be related with sunjce_provider.jar
I’ve tried different variants to include this file in the classpath and even make application dependency to this jar (jar was present in classpath for sure)

HTTPS URL is live URL. Proxy settings are working (it throws a different connection exception otherwise).
java version “1.6.0_23”

Are these errors related?
Any ideas how to fix?
Thanks for help!

Answer 1

Issue with sockets was caused by proxy. I’ve wrong concluded if I don’t get java.net.ConnectException: Connection refused: connect (in case proxy is not configured at all) proxy should not cause issue. In a ‘guest network’ (without proxy) application appeared to be working. As it turned out proxy had different configuration for each protocol and my company policy deprecate raw sockets connections.