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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 javax.net.ssl.SSLProtocolException;
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import static sun.security.ssl.SSLExtension.CH_MAX_FRAGMENT_LENGTH;
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import static sun.security.ssl.SSLExtension.EE_MAX_FRAGMENT_LENGTH;
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import sun.security.ssl.SSLExtension.ExtensionConsumer;
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import static sun.security.ssl.SSLExtension.SH_MAX_FRAGMENT_LENGTH;
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import sun.security.ssl.SSLExtension.SSLExtensionSpec;
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import sun.security.ssl.SSLHandshake.HandshakeMessage;
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/**
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* Pack of the "max_fragment_length" extensions [RFC6066].
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*/
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final class MaxFragExtension {
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static final HandshakeProducer chNetworkProducer =
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new CHMaxFragmentLengthProducer();
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static final ExtensionConsumer chOnLoadConcumer =
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new CHMaxFragmentLengthConsumer();
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static final HandshakeProducer shNetworkProducer =
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new SHMaxFragmentLengthProducer();
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static final ExtensionConsumer shOnLoadConcumer =
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new SHMaxFragmentLengthConsumer();
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static final HandshakeConsumer shOnTradeConsumer =
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new SHMaxFragmentLengthUpdate();
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static final HandshakeProducer eeNetworkProducer =
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new EEMaxFragmentLengthProducer();
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static final ExtensionConsumer eeOnLoadConcumer =
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new EEMaxFragmentLengthConsumer();
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static final HandshakeConsumer eeOnTradeConsumer =
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new EEMaxFragmentLengthUpdate();
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static final SSLStringize maxFragLenStringize =
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new MaxFragLenStringize();
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/**
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* The "max_fragment_length" extension [RFC 6066].
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*/
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static final class MaxFragLenSpec implements SSLExtensionSpec {
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byte id;
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private MaxFragLenSpec(byte id) {
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this.id = id;
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}
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private MaxFragLenSpec(ByteBuffer buffer) throws IOException {
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if (buffer.remaining() != 1) {
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throw new SSLProtocolException(
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"Invalid max_fragment_length extension data");
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}
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this.id = buffer.get();
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}
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@Override
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public String toString() {
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return MaxFragLenEnum.nameOf(id);
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}
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}
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private static final class MaxFragLenStringize implements SSLStringize {
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@Override
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public String toString(ByteBuffer buffer) {
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try {
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return (new MaxFragLenSpec(buffer)).toString();
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} catch (IOException ioe) {
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// For debug logging only, so please swallow exceptions.
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return ioe.getMessage();
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}
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}
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}
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static enum MaxFragLenEnum {
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MFL_512 ((byte)0x01, 512, "2^9"),
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MFL_1024 ((byte)0x02, 1024, "2^10"),
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MFL_2048 ((byte)0x03, 2048, "2^11"),
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MFL_4096 ((byte)0x04, 4096, "2^12");
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final byte id;
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final int fragmentSize;
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final String description;
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private MaxFragLenEnum(byte id, int fragmentSize, String description) {
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this.id = id;
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this.fragmentSize = fragmentSize;
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this.description = description;
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}
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private static MaxFragLenEnum valueOf(byte id) {
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for (MaxFragLenEnum mfl : MaxFragLenEnum.values()) {
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if (mfl.id == id) {
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return mfl;
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}
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}
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return null;
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}
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private static String nameOf(byte id) {
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for (MaxFragLenEnum mfl : MaxFragLenEnum.values()) {
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if (mfl.id == id) {
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return mfl.description;
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}
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}
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return "UNDEFINED-MAX-FRAGMENT-LENGTH(" + id + ")";
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}
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/**
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* Returns the best match enum constant of the specified
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* fragment size.
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*/
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static MaxFragLenEnum valueOf(int fragmentSize) {
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if (fragmentSize <= 0) {
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return null;
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} else if (fragmentSize < 1024) {
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return MFL_512;
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} else if (fragmentSize < 2048) {
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return MFL_1024;
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} else if (fragmentSize < 4096) {
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return MFL_2048;
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} else if (fragmentSize == 4096) {
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return MFL_4096;
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}
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return null;
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}
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}
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/**
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* Network data producer of a "max_fragment_length" extension in
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* the ClientHello handshake message.
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*/
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private static final
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class CHMaxFragmentLengthProducer implements HandshakeProducer {
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// Prevent instantiation of this class.
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private CHMaxFragmentLengthProducer() {
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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 client side only.
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ClientHandshakeContext chc = (ClientHandshakeContext)context;
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// Is it a supported and enabled extension?
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if (!chc.sslConfig.isAvailable(CH_MAX_FRAGMENT_LENGTH)) {
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Ignore unavailable max_fragment_length extension");
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}
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return null;
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}
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// Produce the extension and update the context.
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int requestedMFLength;
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if (chc.isResumption && (chc.resumingSession != null)) {
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// The same extension should be sent for resumption.
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requestedMFLength =
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chc.resumingSession.getNegotiatedMaxFragSize();
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} else if (chc.sslConfig.maximumPacketSize != 0) {
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// Maybe we can calculate the fragment size more accurate
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// by condering the enabled cipher suites in the future.
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requestedMFLength = chc.sslConfig.maximumPacketSize;
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if (chc.sslContext.isDTLS()) {
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requestedMFLength -= DTLSRecord.maxPlaintextPlusSize;
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} else {
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requestedMFLength -= SSLRecord.maxPlaintextPlusSize;
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}
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} else {
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// Need no max_fragment_length extension.
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requestedMFLength = -1;
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}
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MaxFragLenEnum mfl = MaxFragLenEnum.valueOf(requestedMFLength);
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if (mfl != null) {
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// update the context.
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chc.handshakeExtensions.put(
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CH_MAX_FRAGMENT_LENGTH, new MaxFragLenSpec(mfl.id));
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return new byte[] { mfl.id };
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} else {
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// log and ignore, no MFL extension.
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chc.maxFragmentLength = -1;
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"No available max_fragment_length extension can " +
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"be used for fragment size of " +
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requestedMFLength + "bytes");
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}
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}
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return null;
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}
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}
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/**
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* Network data consumer of a "max_fragment_length" extension in
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* the ClientHello handshake message.
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*/
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private static final
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class CHMaxFragmentLengthConsumer implements ExtensionConsumer {
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// Prevent instantiation of this class.
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private CHMaxFragmentLengthConsumer() {
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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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HandshakeMessage message, ByteBuffer buffer) throws IOException {
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// The comsuming happens in server side only.
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ServerHandshakeContext shc = (ServerHandshakeContext)context;
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if (!shc.sslConfig.isAvailable(CH_MAX_FRAGMENT_LENGTH)) {
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Ignore unavailable max_fragment_length extension");
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}
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return; // ignore the extension
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}
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// Parse the extension.
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MaxFragLenSpec spec;
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try {
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spec = new MaxFragLenSpec(buffer);
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} catch (IOException ioe) {
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shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, ioe);
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return; // fatal() always throws, make the compiler happy.
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}
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MaxFragLenEnum mfle = MaxFragLenEnum.valueOf(spec.id);
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if (mfle == null) {
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shc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
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"the requested maximum fragment length is other " +
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"than the allowed values");
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}
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// Update the context.
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shc.maxFragmentLength = mfle.fragmentSize;
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shc.handshakeExtensions.put(CH_MAX_FRAGMENT_LENGTH, spec);
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// No impact on session resumption.
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}
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}
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/**
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* Network data producer of a "max_fragment_length" extension in
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* the ServerHello handshake message.
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*/
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private static final
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class SHMaxFragmentLengthProducer implements HandshakeProducer {
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// Prevent instantiation of this class.
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private SHMaxFragmentLengthProducer() {
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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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// In response to "max_fragment_length" extension request only
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MaxFragLenSpec spec = (MaxFragLenSpec)
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shc.handshakeExtensions.get(CH_MAX_FRAGMENT_LENGTH);
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if (spec == null) {
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.finest(
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"Ignore unavailable max_fragment_length extension");
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}
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return null; // ignore the extension
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}
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if ((shc.maxFragmentLength > 0) &&
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(shc.sslConfig.maximumPacketSize != 0)) {
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int estimatedMaxFragSize =
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shc.negotiatedCipherSuite.calculatePacketSize(
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shc.maxFragmentLength, shc.negotiatedProtocol,
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shc.sslContext.isDTLS());
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if (estimatedMaxFragSize > shc.sslConfig.maximumPacketSize) {
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// For better interoperability, abort the maximum
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// fragment length negotiation, rather than terminate
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// the connection with a fatal alert.
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
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SSLLogger.fine(
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"Abort the maximum fragment length negotiation, " +
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"may overflow the maximum packet size limit.");
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}
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shc.maxFragmentLength = -1;
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}
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}
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// update the context
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if (shc.maxFragmentLength > 0) {
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shc.handshakeSession.setNegotiatedMaxFragSize(
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shc.maxFragmentLength);
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shc.conContext.inputRecord.changeFragmentSize(
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shc.maxFragmentLength);
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shc.conContext.outputRecord.changeFragmentSize(
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shc.maxFragmentLength);
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// The response extension data is the same as the requested one.
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shc.handshakeExtensions.put(SH_MAX_FRAGMENT_LENGTH, spec);
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return new byte[] { spec.id };
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}
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return null;
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}
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338 |
}
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339 |
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340 |
/**
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341 |
* Network data consumer of a "max_fragment_length" extension in
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342 |
* the ServerHello handshake message.
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343 |
*/
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|
344 |
private static final
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345 |
class SHMaxFragmentLengthConsumer implements ExtensionConsumer {
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346 |
// Prevent instantiation of this class.
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347 |
private SHMaxFragmentLengthConsumer() {
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348 |
// blank
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349 |
}
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350 |
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351 |
@Override
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352 |
public void consume(ConnectionContext context,
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353 |
HandshakeMessage message, ByteBuffer buffer) throws IOException {
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354 |
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355 |
// The comsuming happens in client side only.
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356 |
ClientHandshakeContext chc = (ClientHandshakeContext)context;
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357 |
|
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358 |
// In response to "max_fragment_length" extension request only
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359 |
MaxFragLenSpec requestedSpec = (MaxFragLenSpec)
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|
360 |
chc.handshakeExtensions.get(CH_MAX_FRAGMENT_LENGTH);
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|
361 |
if (requestedSpec == null) {
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|
362 |
chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
|
|
|
363 |
"Unexpected max_fragment_length extension in ServerHello");
|
|
|
364 |
}
|
|
|
365 |
|
|
|
366 |
// Parse the extension.
|
|
|
367 |
MaxFragLenSpec spec;
|
|
|
368 |
try {
|
|
|
369 |
spec = new MaxFragLenSpec(buffer);
|
|
|
370 |
} catch (IOException ioe) {
|
|
|
371 |
chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, ioe);
|
|
|
372 |
return; // fatal() always throws, make the compiler happy.
|
|
|
373 |
}
|
|
|
374 |
|
|
|
375 |
if (spec.id != requestedSpec.id) {
|
|
|
376 |
chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
|
|
|
377 |
"The maximum fragment length response is not requested");
|
|
|
378 |
}
|
|
|
379 |
|
|
|
380 |
MaxFragLenEnum mfle = MaxFragLenEnum.valueOf(spec.id);
|
|
|
381 |
if (mfle == null) {
|
|
|
382 |
chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
|
|
|
383 |
"the requested maximum fragment length is other " +
|
|
|
384 |
"than the allowed values");
|
|
|
385 |
}
|
|
|
386 |
|
|
|
387 |
// update the context
|
|
|
388 |
chc.maxFragmentLength = mfle.fragmentSize;
|
|
|
389 |
chc.handshakeExtensions.put(SH_MAX_FRAGMENT_LENGTH, spec);
|
|
30904
|
390 |
}
|
|
|
391 |
}
|
|
|
392 |
|
|
56542
|
393 |
/**
|
|
|
394 |
* After session creation consuming of a "max_fragment_length"
|
|
|
395 |
* extension in the ClientHello handshake message.
|
|
|
396 |
*/
|
|
|
397 |
private static final class SHMaxFragmentLengthUpdate
|
|
|
398 |
implements HandshakeConsumer {
|
|
30904
|
399 |
|
|
56542
|
400 |
// Prevent instantiation of this class.
|
|
|
401 |
private SHMaxFragmentLengthUpdate() {
|
|
|
402 |
// blank
|
|
30904
|
403 |
}
|
|
|
404 |
|
|
56542
|
405 |
@Override
|
|
|
406 |
public void consume(ConnectionContext context,
|
|
|
407 |
HandshakeMessage message) throws IOException {
|
|
|
408 |
// The comsuming happens in client side only.
|
|
|
409 |
ClientHandshakeContext chc = (ClientHandshakeContext)context;
|
|
30904
|
410 |
|
|
56542
|
411 |
MaxFragLenSpec spec = (MaxFragLenSpec)
|
|
|
412 |
chc.handshakeExtensions.get(SH_MAX_FRAGMENT_LENGTH);
|
|
|
413 |
if (spec == null) {
|
|
|
414 |
// Ignore, no "max_fragment_length" extension response.
|
|
|
415 |
return;
|
|
|
416 |
}
|
|
30904
|
417 |
|
|
56542
|
418 |
if ((chc.maxFragmentLength > 0) &&
|
|
|
419 |
(chc.sslConfig.maximumPacketSize != 0)) {
|
|
|
420 |
int estimatedMaxFragSize =
|
|
|
421 |
chc.negotiatedCipherSuite.calculatePacketSize(
|
|
|
422 |
chc.maxFragmentLength, chc.negotiatedProtocol,
|
|
|
423 |
chc.sslContext.isDTLS());
|
|
|
424 |
if (estimatedMaxFragSize > chc.sslConfig.maximumPacketSize) {
|
|
|
425 |
// For better interoperability, abort the maximum
|
|
|
426 |
// fragment length negotiation, rather than terminate
|
|
|
427 |
// the connection with a fatal alert.
|
|
|
428 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
|
|
|
429 |
SSLLogger.fine(
|
|
|
430 |
"Abort the maximum fragment length negotiation, " +
|
|
|
431 |
"may overflow the maximum packet size limit.");
|
|
|
432 |
}
|
|
|
433 |
chc.maxFragmentLength = -1;
|
|
|
434 |
}
|
|
|
435 |
}
|
|
|
436 |
|
|
|
437 |
// update the context
|
|
|
438 |
if (chc.maxFragmentLength > 0) {
|
|
|
439 |
chc.handshakeSession.setNegotiatedMaxFragSize(
|
|
|
440 |
chc.maxFragmentLength);
|
|
|
441 |
chc.conContext.inputRecord.changeFragmentSize(
|
|
|
442 |
chc.maxFragmentLength);
|
|
|
443 |
chc.conContext.outputRecord.changeFragmentSize(
|
|
|
444 |
chc.maxFragmentLength);
|
|
|
445 |
}
|
|
30904
|
446 |
}
|
|
|
447 |
}
|
|
|
448 |
|
|
56542
|
449 |
/**
|
|
|
450 |
* Network data producer of a "max_fragment_length" extension in
|
|
|
451 |
* the EncryptedExtensions handshake message.
|
|
|
452 |
*/
|
|
|
453 |
private static final
|
|
|
454 |
class EEMaxFragmentLengthProducer implements HandshakeProducer {
|
|
|
455 |
// Prevent instantiation of this class.
|
|
|
456 |
private EEMaxFragmentLengthProducer() {
|
|
|
457 |
// blank
|
|
|
458 |
}
|
|
|
459 |
|
|
|
460 |
@Override
|
|
|
461 |
public byte[] produce(ConnectionContext context,
|
|
|
462 |
HandshakeMessage message) throws IOException {
|
|
|
463 |
// The producing happens in server side only.
|
|
|
464 |
ServerHandshakeContext shc = (ServerHandshakeContext)context;
|
|
|
465 |
|
|
|
466 |
// In response to "max_fragment_length" extension request only
|
|
|
467 |
MaxFragLenSpec spec = (MaxFragLenSpec)
|
|
|
468 |
shc.handshakeExtensions.get(CH_MAX_FRAGMENT_LENGTH);
|
|
|
469 |
if (spec == null) {
|
|
|
470 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
|
|
|
471 |
SSLLogger.finest(
|
|
|
472 |
"Ignore unavailable max_fragment_length extension");
|
|
|
473 |
}
|
|
|
474 |
return null; // ignore the extension
|
|
|
475 |
}
|
|
|
476 |
|
|
|
477 |
if ((shc.maxFragmentLength > 0) &&
|
|
|
478 |
(shc.sslConfig.maximumPacketSize != 0)) {
|
|
|
479 |
int estimatedMaxFragSize =
|
|
|
480 |
shc.negotiatedCipherSuite.calculatePacketSize(
|
|
|
481 |
shc.maxFragmentLength, shc.negotiatedProtocol,
|
|
|
482 |
shc.sslContext.isDTLS());
|
|
|
483 |
if (estimatedMaxFragSize > shc.sslConfig.maximumPacketSize) {
|
|
|
484 |
// For better interoperability, abort the maximum
|
|
|
485 |
// fragment length negotiation, rather than terminate
|
|
|
486 |
// the connection with a fatal alert.
|
|
|
487 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
|
|
|
488 |
SSLLogger.fine(
|
|
|
489 |
"Abort the maximum fragment length negotiation, " +
|
|
|
490 |
"may overflow the maximum packet size limit.");
|
|
|
491 |
}
|
|
|
492 |
shc.maxFragmentLength = -1;
|
|
|
493 |
}
|
|
|
494 |
}
|
|
|
495 |
|
|
|
496 |
// update the context
|
|
|
497 |
if (shc.maxFragmentLength > 0) {
|
|
|
498 |
shc.handshakeSession.setNegotiatedMaxFragSize(
|
|
|
499 |
shc.maxFragmentLength);
|
|
|
500 |
shc.conContext.inputRecord.changeFragmentSize(
|
|
|
501 |
shc.maxFragmentLength);
|
|
|
502 |
shc.conContext.outputRecord.changeFragmentSize(
|
|
|
503 |
shc.maxFragmentLength);
|
|
|
504 |
|
|
|
505 |
// The response extension data is the same as the requested one.
|
|
|
506 |
shc.handshakeExtensions.put(EE_MAX_FRAGMENT_LENGTH, spec);
|
|
|
507 |
return new byte[] { spec.id };
|
|
|
508 |
}
|
|
|
509 |
|
|
|
510 |
return null;
|
|
|
511 |
}
|
|
|
512 |
}
|
|
|
513 |
|
|
|
514 |
/**
|
|
|
515 |
* Network data consumer of a "max_fragment_length" extension in the
|
|
|
516 |
* EncryptedExtensions handshake message.
|
|
|
517 |
*/
|
|
|
518 |
private static final
|
|
|
519 |
class EEMaxFragmentLengthConsumer implements ExtensionConsumer {
|
|
|
520 |
// Prevent instantiation of this class.
|
|
|
521 |
private EEMaxFragmentLengthConsumer() {
|
|
|
522 |
// blank
|
|
|
523 |
}
|
|
|
524 |
|
|
|
525 |
@Override
|
|
|
526 |
public void consume(ConnectionContext context,
|
|
|
527 |
HandshakeMessage message, ByteBuffer buffer) throws IOException {
|
|
|
528 |
// The comsuming happens in client side only.
|
|
|
529 |
ClientHandshakeContext chc = (ClientHandshakeContext)context;
|
|
|
530 |
|
|
|
531 |
// In response to "max_fragment_length" extension request only
|
|
|
532 |
MaxFragLenSpec requestedSpec = (MaxFragLenSpec)
|
|
|
533 |
chc.handshakeExtensions.get(CH_MAX_FRAGMENT_LENGTH);
|
|
|
534 |
if (requestedSpec == null) {
|
|
|
535 |
chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE,
|
|
|
536 |
"Unexpected max_fragment_length extension in ServerHello");
|
|
|
537 |
}
|
|
|
538 |
|
|
|
539 |
// Parse the extension.
|
|
|
540 |
MaxFragLenSpec spec;
|
|
|
541 |
try {
|
|
|
542 |
spec = new MaxFragLenSpec(buffer);
|
|
|
543 |
} catch (IOException ioe) {
|
|
|
544 |
chc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, ioe);
|
|
|
545 |
return; // fatal() always throws, make the compiler happy.
|
|
|
546 |
}
|
|
|
547 |
|
|
|
548 |
if (spec.id != requestedSpec.id) {
|
|
|
549 |
chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
|
|
|
550 |
"The maximum fragment length response is not requested");
|
|
|
551 |
}
|
|
|
552 |
|
|
|
553 |
MaxFragLenEnum mfle = MaxFragLenEnum.valueOf(spec.id);
|
|
|
554 |
if (mfle == null) {
|
|
|
555 |
chc.conContext.fatal(Alert.ILLEGAL_PARAMETER,
|
|
|
556 |
"the requested maximum fragment length is other " +
|
|
|
557 |
"than the allowed values");
|
|
|
558 |
}
|
|
|
559 |
|
|
|
560 |
// update the context
|
|
|
561 |
chc.maxFragmentLength = mfle.fragmentSize;
|
|
|
562 |
chc.handshakeExtensions.put(EE_MAX_FRAGMENT_LENGTH, spec);
|
|
|
563 |
}
|
|
|
564 |
}
|
|
|
565 |
|
|
|
566 |
/**
|
|
|
567 |
* After session creation consuming of a "max_fragment_length"
|
|
|
568 |
* extension in the EncryptedExtensions handshake message.
|
|
|
569 |
*/
|
|
|
570 |
private static final
|
|
|
571 |
class EEMaxFragmentLengthUpdate implements HandshakeConsumer {
|
|
|
572 |
// Prevent instantiation of this class.
|
|
|
573 |
private EEMaxFragmentLengthUpdate() {
|
|
|
574 |
// blank
|
|
|
575 |
}
|
|
|
576 |
|
|
|
577 |
@Override
|
|
|
578 |
public void consume(ConnectionContext context,
|
|
|
579 |
HandshakeMessage message) throws IOException {
|
|
|
580 |
// The comsuming happens in client side only.
|
|
|
581 |
ClientHandshakeContext chc = (ClientHandshakeContext)context;
|
|
|
582 |
|
|
|
583 |
MaxFragLenSpec spec = (MaxFragLenSpec)
|
|
|
584 |
chc.handshakeExtensions.get(EE_MAX_FRAGMENT_LENGTH);
|
|
|
585 |
if (spec == null) {
|
|
|
586 |
// Ignore, no "max_fragment_length" extension response.
|
|
|
587 |
return;
|
|
|
588 |
}
|
|
|
589 |
|
|
|
590 |
if ((chc.maxFragmentLength > 0) &&
|
|
|
591 |
(chc.sslConfig.maximumPacketSize != 0)) {
|
|
|
592 |
int estimatedMaxFragSize =
|
|
|
593 |
chc.negotiatedCipherSuite.calculatePacketSize(
|
|
|
594 |
chc.maxFragmentLength, chc.negotiatedProtocol,
|
|
|
595 |
chc.sslContext.isDTLS());
|
|
|
596 |
if (estimatedMaxFragSize > chc.sslConfig.maximumPacketSize) {
|
|
|
597 |
// For better interoperability, abort the maximum
|
|
|
598 |
// fragment length negotiation, rather than terminate
|
|
|
599 |
// the connection with a fatal alert.
|
|
|
600 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
|
|
|
601 |
SSLLogger.fine(
|
|
|
602 |
"Abort the maximum fragment length negotiation, " +
|
|
|
603 |
"may overflow the maximum packet size limit.");
|
|
|
604 |
}
|
|
|
605 |
chc.maxFragmentLength = -1;
|
|
|
606 |
}
|
|
|
607 |
}
|
|
|
608 |
|
|
|
609 |
// update the context
|
|
|
610 |
if (chc.maxFragmentLength > 0) {
|
|
|
611 |
chc.handshakeSession.setNegotiatedMaxFragSize(
|
|
|
612 |
chc.maxFragmentLength);
|
|
|
613 |
chc.conContext.inputRecord.changeFragmentSize(
|
|
|
614 |
chc.maxFragmentLength);
|
|
|
615 |
chc.conContext.outputRecord.changeFragmentSize(
|
|
|
616 |
chc.maxFragmentLength);
|
|
|
617 |
}
|
|
|
618 |
}
|
|
30904
|
619 |
}
|
|
|
620 |
}
|