content: /*
   * Copyright (c) 2010-2019 Nathan Rajlich
   *
   *  Permission is hereby granted, free of charge, to any person
   *  obtaining a copy of this software and associated documentation
   *  files (the "Software"), to deal in the Software without
   *  restriction, including without limitation the rights to use,
   *  copy, modify, merge, publish, distribute, sublicense, and/or sell
   *  copies of the Software, and to permit persons to whom the
   *  Software is furnished to do so, subject to the following
   *  conditions:
   *
   *  The above copyright notice and this permission notice shall be
   *  included in all copies or substantial portions of the Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   *  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
   *  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   *  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   *  OTHER DEALINGS IN THE SOFTWARE.
   */
  
  package com.alibaba.gaiax.studio.third.socket.java_websocket.server;
  
  import androidx.annotation.Keep;
  
  import com.alibaba.gaiax.studio.third.socket.java_websocket.SSLSocketChannel2;
  import com.alibaba.gaiax.studio.third.socket.java_websocket.WebSocketAdapter;
  import com.alibaba.gaiax.studio.third.socket.java_websocket.WebSocketImpl;
  import com.alibaba.gaiax.studio.third.socket.java_websocket.WebSocketServerFactory;
  import com.alibaba.gaiax.studio.third.socket.java_websocket.drafts.Draft;
  
  import java.io.IOException;
  import java.nio.channels.ByteChannel;
  import java.nio.channels.SelectionKey;
  import java.nio.channels.SocketChannel;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  
  import javax.net.ssl.SSLContext;
  import javax.net.ssl.SSLEngine;
  
  @Keep
  public class DefaultSSLWebSocketServerFactory implements WebSocketServerFactory {
      protected SSLContext sslcontext;
      protected ExecutorService exec;
  
      public DefaultSSLWebSocketServerFactory(SSLContext sslContext) {
          this(sslContext, Executors.newSingleThreadScheduledExecutor());
      }
  
      public DefaultSSLWebSocketServerFactory(SSLContext sslContext, ExecutorService exec) {
          if (sslContext == null || exec == null)
              throw new IllegalArgumentException();
          this.sslcontext = sslContext;
          this.exec = exec;
      }
  
      @Override
      public ByteChannel wrapChannel(SocketChannel channel, SelectionKey key) throws IOException {
          SSLEngine e = sslcontext.createSSLEngine();
          /*
           * See https://github.com/TooTallNate/Java-WebSocket/issues/466
           *
           * We remove TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 from the enabled ciphers since it is just available when you patch your java installation directly.
           * E.g. firefox requests this cipher and this causes some dcs/instable connections
           */
          List<String> ciphers = new ArrayList<String>(Arrays.asList(e.getEnabledCipherSuites()));
          ciphers.remove("TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256");
          e.setEnabledCipherSuites(ciphers.toArray(new String[ciphers.size()]));
          e.setUseClientMode(false);
          return new SSLSocketChannel2(channel, e, exec, key);
      }
  
      @Override
      public WebSocketImpl createWebSocket(WebSocketAdapter a, Draft d) {
          return new WebSocketImpl(a, d);
      }
  
      @Override
      public WebSocketImpl createWebSocket(WebSocketAdapter a, List<Draft> d) {
          return new WebSocketImpl(a, d);
      }
  
      @Override
      public void close() {
          exec.shutdown();
      }
  }