Make only the SSLSession public

src/main/java/org/java_websocket/WebSocket.java

@@ -35,7 +35,7 @@
 import org.java_websocket.exceptions.WebsocketNotConnectedException;
 import org.java_websocket.framing.Framedata;
 
-import javax.net.ssl.SSLEngine;
+import javax.net.ssl.SSLSession;
 
 public interface WebSocket {
 
@@ -212,16 +212,16 @@ public interface WebSocket {
 
 	/**
 	 * Does this websocket use an encrypted (wss/ssl) or unencrypted (ws) connection
-	 * @return true, if the websocket does use wss and therefore has a SSLEngine
+	 * @return true, if the websocket does use wss and therefore has a SSLSession
 	 * @since 1.4.1
 	 */
-	boolean hasSSLEngine();
+	boolean hasSSLSupport();
 
 	/**
-	 * Returns the ssl engine of websocket, if ssl/wss is used for this instance.
-	 * @return the ssl engine of this websocket instance
-	 * @throws IllegalArgumentException the underlying channel does not use ssl (use hasSSLEngine() to check)
+	 * Returns the ssl session of websocket, if ssl/wss is used for this instance.
+	 * @return the ssl session of this websocket instance
+	 * @throws IllegalArgumentException the underlying channel does not use ssl (use hasSSLSupport() to check)
 	 * @since 1.4.1
 	 */
-	SSLEngine getSSLEngine() throws IllegalArgumentException;
+	SSLSession getSSLSession() throws IllegalArgumentException;
 }

src/main/java/org/java_websocket/WebSocketImpl.java

@@ -52,7 +52,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import javax.net.ssl.SSLEngine;
+import javax.net.ssl.SSLSession;
 
 /**
  * Represents one end (client or server) of a single WebSocketImpl connection.
@@ -824,16 +824,16 @@ public <T> T getAttachment() {
 	}
 
 	@Override
-	public boolean hasSSLEngine() {
+	public boolean hasSSLSupport() {
 		return channel instanceof ISSLChannel;
 	}
 
 	@Override
-	public SSLEngine getSSLEngine() {
-		if (!hasSSLEngine()) {
-			throw new IllegalArgumentException("This websocket does use ws instead of wss. No SSLEngine available.");
+	public SSLSession getSSLSession() {
+		if (!hasSSLSupport()) {
+			throw new IllegalArgumentException("This websocket does use ws instead of wss. No SSLSession available.");
 		}
-		return ((ISSLChannel) channel).getSSLEngine();
+		return ((ISSLChannel) channel).getSSLEngine().getSession();
 	}
 
 	@Override

src/main/java/org/java_websocket/client/WebSocketClient.java

@@ -41,10 +41,7 @@
 import java.util.concurrent.TimeUnit;
 
 import javax.net.SocketFactory;
-import javax.net.ssl.SSLContext;
-import javax.net.ssl.SSLEngine;
-import javax.net.ssl.SSLException;
-import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.*;
 
 import org.java_websocket.AbstractWebSocket;
 import org.java_websocket.WebSocket;
@@ -852,13 +849,13 @@ public String getResourceDescriptor() {
 	}
 
 	@Override
-	public boolean hasSSLEngine() {
-		return engine.hasSSLEngine();
+	public boolean hasSSLSupport() {
+		return engine.hasSSLSupport();
 	}
 
 	@Override
-	public SSLEngine getSSLEngine() {
-		return engine.getSSLEngine();
+	public SSLSession getSSLSession() {
+		return engine.getSSLSession();
 	}
 
 	/**