author | jnimeh |
Thu, 07 Jun 2018 21:55:35 -0700 | |
branch | JDK-8145252-TLS13-branch |
changeset 56704 | c3ee22c3a0f6 |
parent 56542 | 56aaa6cb3693 |
child 56708 | 25178bb3e8f5 |
permissions | -rw-r--r-- |
30904 | 1 |
/* |
56542 | 2 |
* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
30904 | 3 |
* 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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||
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package sun.security.ssl; |
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||
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import java.io.IOException; |
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56542 | 29 |
import java.nio.ByteBuffer; |
30904 | 30 |
import javax.net.ssl.SSLProtocolException; |
56542 | 31 |
import static sun.security.ssl.SSLExtension.CH_MAX_FRAGMENT_LENGTH; |
32 |
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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30904 | 37 |
|
56542 | 38 |
/** |
39 |
* Pack of the "max_fragment_length" extensions [RFC6066]. |
|
30904 | 40 |
*/ |
56542 | 41 |
final class MaxFragExtension { |
42 |
static final HandshakeProducer chNetworkProducer = |
|
43 |
new CHMaxFragmentLengthProducer(); |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
44 |
static final ExtensionConsumer chOnLoadConsumer = |
56542 | 45 |
new CHMaxFragmentLengthConsumer(); |
46 |
||
47 |
static final HandshakeProducer shNetworkProducer = |
|
48 |
new SHMaxFragmentLengthProducer(); |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
49 |
static final ExtensionConsumer shOnLoadConsumer = |
56542 | 50 |
new SHMaxFragmentLengthConsumer(); |
51 |
static final HandshakeConsumer shOnTradeConsumer = |
|
52 |
new SHMaxFragmentLengthUpdate(); |
|
53 |
||
54 |
static final HandshakeProducer eeNetworkProducer = |
|
55 |
new EEMaxFragmentLengthProducer(); |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
56 |
static final ExtensionConsumer eeOnLoadConsumer = |
56542 | 57 |
new EEMaxFragmentLengthConsumer(); |
58 |
static final HandshakeConsumer eeOnTradeConsumer = |
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new EEMaxFragmentLengthUpdate(); |
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||
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static final SSLStringize maxFragLenStringize = |
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new MaxFragLenStringize(); |
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||
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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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69 |
||
70 |
private MaxFragLenSpec(byte id) { |
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this.id = id; |
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} |
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||
74 |
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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||
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this.id = buffer.get(); |
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} |
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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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30904 | 88 |
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56542 | 89 |
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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101 |
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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||
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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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||
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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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56542 | 117 |
private static MaxFragLenEnum valueOf(byte id) { |
118 |
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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||
124 |
return null; |
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} |
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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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||
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return "UNDEFINED-MAX-FRAGMENT-LENGTH(" + id + ")"; |
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} |
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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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142 |
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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150 |
} else if (fragmentSize == 4096) { |
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return MFL_4096; |
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} |
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30904 | 153 |
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56542 | 154 |
return null; |
155 |
} |
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} |
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157 |
||
158 |
/** |
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159 |
* 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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||
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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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174 |
||
175 |
// Is it a supported and enabled extension? |
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176 |
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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||
184 |
// Produce the extension and update the context. |
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int requestedMFLength; |
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186 |
if (chc.isResumption && (chc.resumingSession != null)) { |
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187 |
// The same extension should be sent for resumption. |
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requestedMFLength = |
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189 |
chc.resumingSession.getNegotiatedMaxFragSize(); |
|
190 |
} else if (chc.sslConfig.maximumPacketSize != 0) { |
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191 |
// 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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193 |
requestedMFLength = chc.sslConfig.maximumPacketSize; |
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194 |
if (chc.sslContext.isDTLS()) { |
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requestedMFLength -= DTLSRecord.maxPlaintextPlusSize; |
|
196 |
} else { |
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requestedMFLength -= SSLRecord.maxPlaintextPlusSize; |
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198 |
} |
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199 |
} else { |
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200 |
// Need no max_fragment_length extension. |
|
201 |
requestedMFLength = -1; |
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202 |
} |
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203 |
||
204 |
MaxFragLenEnum mfl = MaxFragLenEnum.valueOf(requestedMFLength); |
|
205 |
if (mfl != null) { |
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206 |
// update the context. |
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207 |
chc.handshakeExtensions.put( |
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208 |
CH_MAX_FRAGMENT_LENGTH, new MaxFragLenSpec(mfl.id)); |
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30904 | 209 |
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56542 | 210 |
return new byte[] { mfl.id }; |
211 |
} else { |
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212 |
// log and ignore, no MFL extension. |
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chc.maxFragmentLength = -1; |
|
214 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { |
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215 |
SSLLogger.fine( |
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216 |
"No available max_fragment_length extension can " + |
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217 |
"be used for fragment size of " + |
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requestedMFLength + "bytes"); |
|
219 |
} |
|
220 |
} |
|
221 |
||
222 |
return null; |
|
223 |
} |
|
224 |
} |
|
225 |
||
226 |
/** |
|
227 |
* Network data consumer of a "max_fragment_length" extension in |
|
228 |
* the ClientHello handshake message. |
|
229 |
*/ |
|
230 |
private static final |
|
231 |
class CHMaxFragmentLengthConsumer implements ExtensionConsumer { |
|
232 |
// Prevent instantiation of this class. |
|
233 |
private CHMaxFragmentLengthConsumer() { |
|
234 |
// blank |
|
235 |
} |
|
236 |
||
237 |
@Override |
|
238 |
public void consume(ConnectionContext context, |
|
239 |
HandshakeMessage message, ByteBuffer buffer) throws IOException { |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
240 |
// The consuming happens in server side only. |
56542 | 241 |
ServerHandshakeContext shc = (ServerHandshakeContext)context; |
242 |
||
243 |
if (!shc.sslConfig.isAvailable(CH_MAX_FRAGMENT_LENGTH)) { |
|
244 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { |
|
245 |
SSLLogger.fine( |
|
246 |
"Ignore unavailable max_fragment_length extension"); |
|
247 |
} |
|
248 |
return; // ignore the extension |
|
249 |
} |
|
250 |
||
251 |
// Parse the extension. |
|
252 |
MaxFragLenSpec spec; |
|
253 |
try { |
|
254 |
spec = new MaxFragLenSpec(buffer); |
|
255 |
} catch (IOException ioe) { |
|
256 |
shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, ioe); |
|
257 |
return; // fatal() always throws, make the compiler happy. |
|
258 |
} |
|
259 |
||
260 |
MaxFragLenEnum mfle = MaxFragLenEnum.valueOf(spec.id); |
|
261 |
if (mfle == null) { |
|
262 |
shc.conContext.fatal(Alert.ILLEGAL_PARAMETER, |
|
263 |
"the requested maximum fragment length is other " + |
|
264 |
"than the allowed values"); |
|
265 |
} |
|
266 |
||
267 |
// Update the context. |
|
268 |
shc.maxFragmentLength = mfle.fragmentSize; |
|
269 |
shc.handshakeExtensions.put(CH_MAX_FRAGMENT_LENGTH, spec); |
|
270 |
||
271 |
// No impact on session resumption. |
|
30904 | 272 |
} |
273 |
} |
|
274 |
||
56542 | 275 |
/** |
276 |
* Network data producer of a "max_fragment_length" extension in |
|
277 |
* the ServerHello handshake message. |
|
278 |
*/ |
|
279 |
private static final |
|
280 |
class SHMaxFragmentLengthProducer implements HandshakeProducer { |
|
281 |
// Prevent instantiation of this class. |
|
282 |
private SHMaxFragmentLengthProducer() { |
|
283 |
// blank |
|
30904 | 284 |
} |
285 |
||
56542 | 286 |
@Override |
287 |
public byte[] produce(ConnectionContext context, |
|
288 |
HandshakeMessage message) throws IOException { |
|
289 |
// The producing happens in server side only. |
|
290 |
ServerHandshakeContext shc = (ServerHandshakeContext)context; |
|
291 |
||
292 |
// In response to "max_fragment_length" extension request only |
|
293 |
MaxFragLenSpec spec = (MaxFragLenSpec) |
|
294 |
shc.handshakeExtensions.get(CH_MAX_FRAGMENT_LENGTH); |
|
295 |
if (spec == null) { |
|
296 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { |
|
297 |
SSLLogger.finest( |
|
298 |
"Ignore unavailable max_fragment_length extension"); |
|
299 |
} |
|
300 |
return null; // ignore the extension |
|
301 |
} |
|
302 |
||
303 |
if ((shc.maxFragmentLength > 0) && |
|
304 |
(shc.sslConfig.maximumPacketSize != 0)) { |
|
305 |
int estimatedMaxFragSize = |
|
306 |
shc.negotiatedCipherSuite.calculatePacketSize( |
|
307 |
shc.maxFragmentLength, shc.negotiatedProtocol, |
|
308 |
shc.sslContext.isDTLS()); |
|
309 |
if (estimatedMaxFragSize > shc.sslConfig.maximumPacketSize) { |
|
310 |
// For better interoperability, abort the maximum |
|
311 |
// fragment length negotiation, rather than terminate |
|
312 |
// the connection with a fatal alert. |
|
313 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { |
|
314 |
SSLLogger.fine( |
|
315 |
"Abort the maximum fragment length negotiation, " + |
|
316 |
"may overflow the maximum packet size limit."); |
|
317 |
} |
|
318 |
shc.maxFragmentLength = -1; |
|
319 |
} |
|
320 |
} |
|
321 |
||
322 |
// update the context |
|
323 |
if (shc.maxFragmentLength > 0) { |
|
324 |
shc.handshakeSession.setNegotiatedMaxFragSize( |
|
325 |
shc.maxFragmentLength); |
|
326 |
shc.conContext.inputRecord.changeFragmentSize( |
|
327 |
shc.maxFragmentLength); |
|
328 |
shc.conContext.outputRecord.changeFragmentSize( |
|
329 |
shc.maxFragmentLength); |
|
330 |
||
331 |
// The response extension data is the same as the requested one. |
|
332 |
shc.handshakeExtensions.put(SH_MAX_FRAGMENT_LENGTH, spec); |
|
333 |
return new byte[] { spec.id }; |
|
334 |
} |
|
335 |
||
336 |
return null; |
|
337 |
} |
|
338 |
} |
|
339 |
||
340 |
/** |
|
341 |
* Network data consumer of a "max_fragment_length" extension in |
|
342 |
* the ServerHello handshake message. |
|
343 |
*/ |
|
344 |
private static final |
|
345 |
class SHMaxFragmentLengthConsumer implements ExtensionConsumer { |
|
346 |
// Prevent instantiation of this class. |
|
347 |
private SHMaxFragmentLengthConsumer() { |
|
348 |
// blank |
|
349 |
} |
|
350 |
||
351 |
@Override |
|
352 |
public void consume(ConnectionContext context, |
|
353 |
HandshakeMessage message, ByteBuffer buffer) throws IOException { |
|
354 |
||
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
355 |
// The consuming happens in client side only. |
56542 | 356 |
ClientHandshakeContext chc = (ClientHandshakeContext)context; |
357 |
||
358 |
// In response to "max_fragment_length" extension request only |
|
359 |
MaxFragLenSpec requestedSpec = (MaxFragLenSpec) |
|
360 |
chc.handshakeExtensions.get(CH_MAX_FRAGMENT_LENGTH); |
|
361 |
if (requestedSpec == null) { |
|
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 { |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
408 |
// The consuming happens in client side only. |
56542 | 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 { |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
528 |
// The consuming happens in client side only. |
56542 | 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 { |
|
56704
c3ee22c3a0f6
Minor nits and cleanup across SSLExtension classes
jnimeh
parents:
56542
diff
changeset
|
580 |
// The consuming happens in client side only. |
56542 | 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 |
} |