/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
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package io.undertow.websockets.core.protocol.version07;


import io.undertow.util.Headers;
import io.undertow.websockets.core.WebSocketChannel;
import io.undertow.websockets.core.WebSocketVersion;
import io.undertow.websockets.core.protocol.Handshake;
import io.undertow.websockets.extensions.CompositeExtensionFunction;
import io.undertow.websockets.extensions.ExtensionFunction;
import io.undertow.websockets.spi.WebSocketHttpExchange;
import org.xnio.IoUtils;
import io.undertow.connector.ByteBufferPool;
import org.xnio.StreamConnection;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Collections;
import java.util.List;
import java.util.Set;

The handshaking protocol implementation for Hybi-07.
Author:Mike Brock
/** * The handshaking protocol implementation for Hybi-07. * * @author Mike Brock */
public class Hybi07Handshake extends Handshake { public static final String MAGIC_NUMBER = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; protected Hybi07Handshake(final WebSocketVersion version, final Set<String> subprotocols, boolean allowExtensions) { super(version, "SHA1", MAGIC_NUMBER, subprotocols); this.allowExtensions = allowExtensions; } public Hybi07Handshake(final Set<String> subprotocols, boolean allowExtensions) { this(WebSocketVersion.V07, subprotocols, allowExtensions); } public Hybi07Handshake() { this(WebSocketVersion.V07, Collections.<String>emptySet(), false); } @Override public boolean matches(final WebSocketHttpExchange exchange) { if (exchange.getRequestHeader(Headers.SEC_WEB_SOCKET_KEY_STRING) != null && exchange.getRequestHeader(Headers.SEC_WEB_SOCKET_VERSION_STRING) != null) { return exchange.getRequestHeader(Headers.SEC_WEB_SOCKET_VERSION_STRING) .equals(getVersion().toHttpHeaderValue()); } return false; } protected void handshakeInternal(final WebSocketHttpExchange exchange) { String origin = exchange.getRequestHeader(Headers.SEC_WEB_SOCKET_ORIGIN_STRING); if (origin != null) { exchange.setResponseHeader(Headers.SEC_WEB_SOCKET_ORIGIN_STRING, origin); } selectSubprotocol(exchange); selectExtensions(exchange); exchange.setResponseHeader(Headers.SEC_WEB_SOCKET_LOCATION_STRING, getWebSocketLocation(exchange)); final String key = exchange.getRequestHeader(Headers.SEC_WEB_SOCKET_KEY_STRING); try { final String solution = solve(key); exchange.setResponseHeader(Headers.SEC_WEB_SOCKET_ACCEPT_STRING, solution); performUpgrade(exchange); } catch (NoSuchAlgorithmException e) { IoUtils.safeClose(exchange); exchange.endExchange(); return; } } protected final String solve(final String nonceBase64) throws NoSuchAlgorithmException { final String concat = nonceBase64.trim() + getMagicNumber(); final MessageDigest digest = MessageDigest.getInstance(getHashAlgorithm()); digest.update(concat.getBytes(StandardCharsets.UTF_8)); return Base64.encodeBytes(digest.digest()).trim(); } @Override public WebSocketChannel createChannel(WebSocketHttpExchange exchange, final StreamConnection channel, final ByteBufferPool pool) { List<ExtensionFunction> extensionFunctions = initExtensions(exchange); return new WebSocket07Channel(channel, pool, getWebSocketLocation(exchange), exchange.getResponseHeader(Headers.SEC_WEB_SOCKET_PROTOCOL_STRING), false, !extensionFunctions.isEmpty(), CompositeExtensionFunction.compose(extensionFunctions), exchange.getPeerConnections(), exchange.getOptions()); } }