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/*
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.security.ssl;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.text.MessageFormat;
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import java.util.Locale;
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import sun.security.ssl.ClientHello.ClientHelloMessage;
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import sun.security.ssl.SSLHandshake.HandshakeMessage;
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/**
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* Pack of the HelloVerifyRequest handshake message.
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*/
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final class HelloVerifyRequest {
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static final SSLConsumer handshakeConsumer =
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new HelloVerifyRequestConsumer();
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static final HandshakeProducer handshakeProducer =
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new HelloVerifyRequestProducer();
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/**
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* The HelloVerifyRequest handshake message [RFC 6347].
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*/
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static final class HelloVerifyRequestMessage extends HandshakeMessage {
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final int serverVersion;
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final byte[] cookie;
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HelloVerifyRequestMessage(HandshakeContext context,
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HandshakeMessage message) throws IOException {
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super(context);
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// This happens in server side only.
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ServerHandshakeContext shc =
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(ServerHandshakeContext)context;
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ClientHelloMessage clientHello = (ClientHelloMessage)message;
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HelloCookieManager hcMgr =
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shc.sslContext.getHelloCookieManager(ProtocolVersion.DTLS10);
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this.serverVersion = shc.clientHelloVersion;
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this.cookie = hcMgr.createCookie(shc, clientHello);
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}
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HelloVerifyRequestMessage(HandshakeContext context,
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ByteBuffer m) throws IOException {
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super(context);
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// This happens in client side only.
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ClientHandshakeContext chc = (ClientHandshakeContext)context;
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// struct {
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// ProtocolVersion server_version;
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// opaque cookie<0..2^8-1>;
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// } HelloVerifyRequest;
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if (m.remaining() < 3) {
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chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"Invalid HelloVerifyRequest: no sufficient data");
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}
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byte major = m.get();
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byte minor = m.get();
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this.serverVersion = ((major & 0xFF) << 8) | (minor & 0xFF);
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this.cookie = Record.getBytes8(m);
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}
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@Override
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public SSLHandshake handshakeType() {
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return SSLHandshake.HELLO_VERIFY_REQUEST;
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}
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@Override
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public int messageLength() {
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return 2 + cookie.length; // 2: the length of protocol version
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}
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@Override
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public void send(HandshakeOutStream hos) throws IOException {
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hos.putInt8((byte)((serverVersion >>> 8) & 0xFF));
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hos.putInt8((byte)(serverVersion & 0xFF));
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hos.putBytes8(cookie);
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}
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@Override
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public String toString() {
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MessageFormat messageFormat = new MessageFormat(
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"\"HelloVerifyRequest\": '{'\n" +
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" \"server version\" : \"{0}\",\n" +
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" \"cookie\" : \"{1}\",\n" +
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"'}'",
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Locale.ENGLISH);
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Object[] messageFields = {
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ProtocolVersion.nameOf(serverVersion),
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Utilities.toHexString(cookie),
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};
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return messageFormat.format(messageFields);
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}
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}
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/**
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* The "HelloVerifyRequest" handshake message producer.
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*/
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private static final
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class HelloVerifyRequestProducer implements HandshakeProducer {
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// Prevent instantiation of this class.
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private HelloVerifyRequestProducer() {
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// blank
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}
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@Override
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public byte[] produce(ConnectionContext context,
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HandshakeMessage message) throws IOException {
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// The producing happens in server side only.
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ServerHandshakeContext shc = (ServerHandshakeContext)context;
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// clean up this producer
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shc.handshakeProducers.remove(SSLHandshake.HELLO_VERIFY_REQUEST.id);
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HelloVerifyRequestMessage hvrm =
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new HelloVerifyRequestMessage(shc, message);
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Produced HelloVerifyRequest handshake message", hvrm);
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}
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// Output the handshake message.
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hvrm.write(shc.handshakeOutput);
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shc.handshakeOutput.flush();
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// update the context
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// TODO: stateless, clean up the handshake context?
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shc.handshakeHash.finish(); // forgot about the handshake hash
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shc.handshakeExtensions.clear();
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// What's the expected response?
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shc.handshakeConsumers.put(
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SSLHandshake.CLIENT_HELLO.id, SSLHandshake.CLIENT_HELLO);
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// The handshake message has been delivered.
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return null;
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}
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}
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/**
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* The "HelloVerifyRequest" handshake message consumer.
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*/
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private static final class HelloVerifyRequestConsumer
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implements SSLConsumer {
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// Prevent instantiation of this class.
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private HelloVerifyRequestConsumer() {
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// blank
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}
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@Override
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public void consume(ConnectionContext context,
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ByteBuffer message) throws IOException {
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// The consuming happens in client side only.
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ClientHandshakeContext chc = (ClientHandshakeContext)context;
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// clean up this consumer
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chc.handshakeConsumers.remove(SSLHandshake.HELLO_VERIFY_REQUEST.id);
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if (!chc.handshakeConsumers.isEmpty()) {
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chc.handshakeConsumers.remove(SSLHandshake.SERVER_HELLO.id);
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}
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if (!chc.handshakeConsumers.isEmpty()) {
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chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
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"No more message expected before " +
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"HelloVerifyRequest is processed");
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}
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// Refresh handshake hash.
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chc.handshakeHash.finish(); // forgot about the handshake hash
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HelloVerifyRequestMessage hvrm =
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new HelloVerifyRequestMessage(chc, message);
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Consuming HelloVerifyRequest handshake message", hvrm);
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}
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// Note that HelloVerifyRequest.server_version is used solely to
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// indicate packet formatting, and not as part of version
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// negotiation. Need not to check version values match for
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// HelloVerifyRequest message.
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chc.initialClientHelloMsg.setHelloCookie(hvrm.cookie);
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//
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// produce response handshake message
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//
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SSLHandshake.CLIENT_HELLO.produce(context, hvrm);
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}
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}
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}
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