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A barebones WebSocket client and server implementation written 100% in Java

There is a newer version: 1.5.7

/*
 * 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 org.java_websocket.server;

import org.java_websocket.SSLSocketChannel2;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLParameters;
import java.io.IOException;
import java.nio.channels.ByteChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * WebSocketFactory that can be configured to only support specific protocols and cipher suites.
 */
public class SSLParametersWebSocketServerFactory extends DefaultSSLWebSocketServerFactory {

  private final SSLParameters sslParameters;

  /**
   * New CustomSSLWebSocketServerFactory configured to only support given protocols and given cipher suites.
   *
   * @param sslContext          - can not be null
   * @param sslParameters       - can not be null
   */
  public SSLParametersWebSocketServerFactory(SSLContext sslContext, SSLParameters sslParameters) {
    this(sslContext, Executors.newSingleThreadScheduledExecutor(), sslParameters);
  }

  /**
   * New CustomSSLWebSocketServerFactory configured to only support given protocols and given cipher suites.
   *
   * @param sslContext          - can not be null
   * @param executerService     - can not be null
   * @param sslParameters       - can not be null
   */
  public SSLParametersWebSocketServerFactory(SSLContext sslContext, ExecutorService executerService, SSLParameters sslParameters) {
    super(sslContext, executerService);
    if (sslParameters == null) {
      throw new IllegalArgumentException();
    }
    this.sslParameters = sslParameters;
  }

  @Override
  public ByteChannel wrapChannel(SocketChannel channel, SelectionKey key) throws IOException {
    SSLEngine e = sslcontext.createSSLEngine();
    e.setUseClientMode(false);
    e.setSSLParameters(sslParameters);
    return new SSLSocketChannel2(channel, e, exec, key);
  }
}