author | wetmore |
Fri, 11 May 2018 15:53:12 -0700 | |
branch | JDK-8145252-TLS13-branch |
changeset 56542 | 56aaa6cb3693 |
parent 47216 | 71c04702a3d5 |
child 56660 | 66c803c3ce32 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
56542 | 2 |
* Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved. |
2 | 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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5506 | 7 |
* published by the Free Software Foundation. Oracle designates this |
2 | 8 |
* particular file as subject to the "Classpath" exception as provided |
5506 | 9 |
* 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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5506 | 21 |
* 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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2 | 24 |
*/ |
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||
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package sun.security.ssl; |
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27 |
||
56542 | 28 |
import java.io.IOException; |
29 |
import java.nio.ByteBuffer; |
|
30 |
import java.util.LinkedList; |
|
31 |
import javax.net.ssl.SSLHandshakeException; |
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30904 | 32 |
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56542 | 33 |
import sun.security.ssl.SSLCipher.SSLWriteCipher; |
34 |
import sun.security.ssl.KeyUpdate.KeyUpdateMessage; |
|
2 | 35 |
|
36 |
/** |
|
30904 | 37 |
* {@code OutputRecord} implementation for {@code SSLEngine}. |
2 | 38 |
*/ |
30904 | 39 |
final class SSLEngineOutputRecord extends OutputRecord implements SSLRecord { |
40 |
||
41 |
private HandshakeFragment fragmenter = null; |
|
42 |
private boolean isTalkingToV2 = false; // SSLv2Hello |
|
43 |
private ByteBuffer v2ClientHello = null; // SSLv2Hello |
|
44 |
||
45 |
private boolean isCloseWaiting = false; |
|
46 |
||
56542 | 47 |
SSLEngineOutputRecord(HandshakeHash handshakeHash) { |
48 |
super(handshakeHash, SSLWriteCipher.nullTlsWriteCipher()); |
|
30904 | 49 |
|
50 |
this.packetSize = SSLRecord.maxRecordSize; |
|
56542 | 51 |
this.protocolVersion = ProtocolVersion.NONE; |
30904 | 52 |
} |
2 | 53 |
|
30904 | 54 |
@Override |
32649
2ee9017c7597
8136583: Core libraries should use blessed modifier order
martin
parents:
30904
diff
changeset
|
55 |
public synchronized void close() throws IOException { |
30904 | 56 |
if (!isClosed) { |
56542 | 57 |
if (fragmenter != null && fragmenter.hasAlert()) { |
30904 | 58 |
isCloseWaiting = true; |
59 |
} else { |
|
60 |
super.close(); |
|
61 |
} |
|
62 |
} |
|
63 |
} |
|
64 |
||
65 |
@Override |
|
66 |
void encodeAlert(byte level, byte description) throws IOException { |
|
56542 | 67 |
if (fragmenter == null) { |
68 |
fragmenter = new HandshakeFragment(); |
|
69 |
} |
|
30904 | 70 |
|
56542 | 71 |
fragmenter.queueUpAlert(level, description); |
30904 | 72 |
} |
2 | 73 |
|
30904 | 74 |
@Override |
75 |
void encodeHandshake(byte[] source, |
|
76 |
int offset, int length) throws IOException { |
|
77 |
||
78 |
if (fragmenter == null) { |
|
79 |
fragmenter = new HandshakeFragment(); |
|
80 |
} |
|
81 |
||
82 |
if (firstMessage) { |
|
83 |
firstMessage = false; |
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2 | 84 |
|
30904 | 85 |
if ((helloVersion == ProtocolVersion.SSL20Hello) && |
56542 | 86 |
(source[offset] == SSLHandshake.CLIENT_HELLO.id) && |
30904 | 87 |
// 5: recode header size |
88 |
(source[offset + 4 + 2 + 32] == 0)) { |
|
89 |
// V3 session ID is empty |
|
90 |
// 4: handshake header size |
|
91 |
// 2: client_version in ClientHello |
|
92 |
// 32: random in ClientHello |
|
93 |
||
94 |
// Double space should be big enough for the converted message. |
|
95 |
v2ClientHello = encodeV2ClientHello( |
|
96 |
source, (offset + 4), (length - 4)); |
|
2 | 97 |
|
30904 | 98 |
v2ClientHello.position(2); // exclude the header |
56542 | 99 |
handshakeHash.deliver(v2ClientHello); |
30904 | 100 |
v2ClientHello.position(0); |
101 |
||
102 |
return; |
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103 |
} |
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104 |
} |
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105 |
||
106 |
byte handshakeType = source[offset]; |
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56542 | 107 |
if (handshakeHash.isHashable(handshakeType)) { |
108 |
handshakeHash.deliver(source, offset, length); |
|
30904 | 109 |
} |
110 |
||
111 |
fragmenter.queueUpFragment(source, offset, length); |
|
112 |
} |
|
113 |
||
114 |
@Override |
|
115 |
void encodeChangeCipherSpec() throws IOException { |
|
116 |
if (fragmenter == null) { |
|
117 |
fragmenter = new HandshakeFragment(); |
|
118 |
} |
|
119 |
fragmenter.queueUpChangeCipherSpec(); |
|
120 |
} |
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121 |
||
122 |
@Override |
|
123 |
void encodeV2NoCipher() throws IOException { |
|
124 |
isTalkingToV2 = true; |
|
2 | 125 |
} |
126 |
||
30904 | 127 |
@Override |
56542 | 128 |
Ciphertext encode( |
129 |
ByteBuffer[] srcs, int srcsOffset, int srcsLength, |
|
130 |
ByteBuffer[] dsts, int dstsOffset, int dstsLength) throws IOException { |
|
131 |
return encode(srcs, srcsOffset, srcsLength, dsts[0]); |
|
132 |
} |
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133 |
||
134 |
private Ciphertext encode(ByteBuffer[] sources, int offset, int length, |
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30904 | 135 |
ByteBuffer destination) throws IOException { |
2 | 136 |
|
56542 | 137 |
if (writeCipher.authenticator.seqNumOverflow()) { |
138 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) { |
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139 |
SSLLogger.fine( |
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140 |
"sequence number extremely close to overflow " + |
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30904 | 141 |
"(2^64-1 packets). Closing connection."); |
142 |
} |
|
2 | 143 |
|
30904 | 144 |
throw new SSLHandshakeException("sequence number overflow"); |
145 |
} |
|
2 | 146 |
|
56542 | 147 |
// Don't process the incoming record until all of the |
148 |
// buffered records get handled. |
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149 |
Ciphertext ct = acquireCiphertext(destination); |
|
150 |
if (ct != null) { |
|
151 |
return ct; |
|
152 |
} |
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153 |
||
154 |
if (sources == null || sources.length == 0) { |
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return null; |
|
156 |
} |
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157 |
||
158 |
int srcsRemains = 0; |
|
159 |
for (int i = offset; i < offset + length; i++) { |
|
160 |
srcsRemains += sources[i].remaining(); |
|
161 |
} |
|
162 |
||
163 |
if (srcsRemains == 0) { |
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164 |
return null; |
|
2 | 165 |
} |
166 |
||
30904 | 167 |
int dstLim = destination.limit(); |
168 |
boolean isFirstRecordOfThePayload = true; |
|
169 |
int packetLeftSize = Math.min(maxRecordSize, packetSize); |
|
170 |
boolean needMorePayload = true; |
|
171 |
long recordSN = 0L; |
|
172 |
while (needMorePayload) { |
|
173 |
int fragLen; |
|
174 |
if (isFirstRecordOfThePayload && needToSplitPayload()) { |
|
175 |
needMorePayload = true; |
|
176 |
||
177 |
fragLen = 1; |
|
178 |
isFirstRecordOfThePayload = false; |
|
179 |
} else { |
|
180 |
needMorePayload = false; |
|
181 |
||
182 |
if (packetLeftSize > 0) { |
|
56542 | 183 |
fragLen =writeCipher.calculateFragmentSize( |
184 |
packetLeftSize, headerSize); |
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30904 | 185 |
|
186 |
fragLen = Math.min(fragLen, Record.maxDataSize); |
|
187 |
} else { |
|
188 |
fragLen = Record.maxDataSize; |
|
189 |
} |
|
190 |
||
191 |
if (fragmentSize > 0) { |
|
192 |
fragLen = Math.min(fragLen, fragmentSize); |
|
193 |
} |
|
194 |
} |
|
195 |
||
196 |
int dstPos = destination.position(); |
|
197 |
int dstContent = dstPos + headerSize + |
|
198 |
writeCipher.getExplicitNonceSize(); |
|
199 |
destination.position(dstContent); |
|
2 | 200 |
|
30904 | 201 |
int remains = Math.min(fragLen, destination.remaining()); |
202 |
fragLen = 0; |
|
203 |
int srcsLen = offset + length; |
|
204 |
for (int i = offset; (i < srcsLen) && (remains > 0); i++) { |
|
205 |
int amount = Math.min(sources[i].remaining(), remains); |
|
206 |
int srcLimit = sources[i].limit(); |
|
207 |
sources[i].limit(sources[i].position() + amount); |
|
208 |
destination.put(sources[i]); |
|
209 |
sources[i].limit(srcLimit); // restore the limit |
|
210 |
remains -= amount; |
|
211 |
fragLen += amount; |
|
212 |
||
213 |
if (remains > 0) { |
|
214 |
offset++; |
|
215 |
length--; |
|
216 |
} |
|
217 |
} |
|
218 |
||
219 |
destination.limit(destination.position()); |
|
220 |
destination.position(dstContent); |
|
221 |
||
56542 | 222 |
if (SSLLogger.isOn && SSLLogger.isOn("record")) { |
223 |
SSLLogger.fine( |
|
224 |
"WRITE: " + protocolVersion + " " + |
|
225 |
ContentType.APPLICATION_DATA.name + |
|
30904 | 226 |
", length = " + destination.remaining()); |
227 |
} |
|
228 |
||
229 |
// Encrypt the fragment and wrap up a record. |
|
56542 | 230 |
recordSN = encrypt(writeCipher, |
231 |
ContentType.APPLICATION_DATA.id, destination, |
|
30904 | 232 |
dstPos, dstLim, headerSize, |
56542 | 233 |
protocolVersion); |
30904 | 234 |
|
56542 | 235 |
if (SSLLogger.isOn && SSLLogger.isOn("packet")) { |
30904 | 236 |
ByteBuffer temporary = destination.duplicate(); |
237 |
temporary.limit(temporary.position()); |
|
238 |
temporary.position(dstPos); |
|
56542 | 239 |
SSLLogger.fine("Raw write", temporary); |
30904 | 240 |
} |
241 |
||
242 |
packetLeftSize -= destination.position() - dstPos; |
|
243 |
||
244 |
// remain the limit unchanged |
|
245 |
destination.limit(dstLim); |
|
246 |
||
247 |
if (isFirstAppOutputRecord) { |
|
248 |
isFirstAppOutputRecord = false; |
|
249 |
} |
|
56542 | 250 |
|
251 |
if (writeCipher.atKeyLimit()) { |
|
252 |
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) { |
|
253 |
SSLLogger.fine("KeyUpdate: triggered"); |
|
254 |
} |
|
255 |
||
256 |
PostHandshakeContext p = new PostHandshakeContext(tc); |
|
257 |
KeyUpdate.handshakeProducer.produce(p, |
|
258 |
new KeyUpdateMessage(p, KeyUpdateMessage.REQUSTED)); |
|
259 |
} |
|
30904 | 260 |
} |
261 |
||
56542 | 262 |
return new Ciphertext(ContentType.APPLICATION_DATA.id, |
263 |
SSLHandshake.NOT_APPLICABLE.id, recordSN); |
|
2 | 264 |
} |
265 |
||
56542 | 266 |
private Ciphertext acquireCiphertext(ByteBuffer destination) throws IOException { |
30904 | 267 |
if (isTalkingToV2) { // SSLv2Hello |
268 |
// We don't support SSLv2. Send an SSLv2 error message |
|
269 |
// so that the connection can be closed gracefully. |
|
270 |
// |
|
271 |
// Please don't change the limit of the destination buffer. |
|
272 |
destination.put(SSLRecord.v2NoCipher); |
|
56542 | 273 |
if (SSLLogger.isOn && SSLLogger.isOn("packet")) { |
274 |
SSLLogger.fine("Raw write", SSLRecord.v2NoCipher); |
|
30904 | 275 |
} |
276 |
||
277 |
isTalkingToV2 = false; |
|
278 |
||
56542 | 279 |
return new Ciphertext(ContentType.ALERT.id, |
280 |
SSLHandshake.NOT_APPLICABLE.id, -1L); |
|
30904 | 281 |
} |
282 |
||
283 |
if (v2ClientHello != null) { |
|
284 |
// deliver the SSLv2 format ClientHello message |
|
285 |
// |
|
286 |
// Please don't change the limit of the destination buffer. |
|
56542 | 287 |
if (SSLLogger.isOn) { |
288 |
if (SSLLogger.isOn("record")) { |
|
289 |
SSLLogger.fine(Thread.currentThread().getName() + |
|
30904 | 290 |
", WRITE: SSLv2 ClientHello message" + |
291 |
", length = " + v2ClientHello.remaining()); |
|
292 |
} |
|
293 |
||
56542 | 294 |
if (SSLLogger.isOn("packet")) { |
295 |
SSLLogger.fine("Raw write", v2ClientHello); |
|
30904 | 296 |
} |
297 |
} |
|
298 |
||
299 |
destination.put(v2ClientHello); |
|
300 |
v2ClientHello = null; |
|
301 |
||
56542 | 302 |
return new Ciphertext(ContentType.HANDSHAKE.id, |
303 |
SSLHandshake.CLIENT_HELLO.id, -1L); |
|
30904 | 304 |
} |
305 |
||
306 |
if (fragmenter != null) { |
|
307 |
return fragmenter.acquireCiphertext(destination); |
|
308 |
} |
|
309 |
||
310 |
return null; |
|
2 | 311 |
} |
312 |
||
30904 | 313 |
@Override |
314 |
boolean isEmpty() { |
|
315 |
return (!isTalkingToV2) && (v2ClientHello == null) && |
|
56542 | 316 |
((fragmenter == null) || fragmenter.isEmpty()); |
30904 | 317 |
} |
318 |
||
319 |
// buffered record fragment |
|
320 |
private static class RecordMemo { |
|
321 |
byte contentType; |
|
322 |
byte majorVersion; |
|
323 |
byte minorVersion; |
|
56542 | 324 |
SSLWriteCipher encodeCipher; |
30904 | 325 |
|
326 |
byte[] fragment; |
|
327 |
} |
|
328 |
||
329 |
private static class HandshakeMemo extends RecordMemo { |
|
330 |
byte handshakeType; |
|
331 |
int acquireOffset; |
|
2 | 332 |
} |
333 |
||
30904 | 334 |
final class HandshakeFragment { |
335 |
private LinkedList<RecordMemo> handshakeMemos = new LinkedList<>(); |
|
336 |
||
337 |
void queueUpFragment(byte[] source, |
|
338 |
int offset, int length) throws IOException { |
|
339 |
HandshakeMemo memo = new HandshakeMemo(); |
|
340 |
||
56542 | 341 |
memo.contentType = ContentType.HANDSHAKE.id; |
30904 | 342 |
memo.majorVersion = protocolVersion.major; // kick start version? |
343 |
memo.minorVersion = protocolVersion.minor; |
|
344 |
memo.encodeCipher = writeCipher; |
|
345 |
||
346 |
memo.handshakeType = source[offset]; |
|
347 |
memo.acquireOffset = 0; |
|
348 |
memo.fragment = new byte[length - 4]; // 4: header size |
|
349 |
// 1: HandshakeType |
|
350 |
// 3: message length |
|
351 |
System.arraycopy(source, offset + 4, memo.fragment, 0, length - 4); |
|
352 |
||
353 |
handshakeMemos.add(memo); |
|
354 |
} |
|
355 |
||
356 |
void queueUpChangeCipherSpec() { |
|
357 |
RecordMemo memo = new RecordMemo(); |
|
358 |
||
56542 | 359 |
memo.contentType = ContentType.CHANGE_CIPHER_SPEC.id; |
30904 | 360 |
memo.majorVersion = protocolVersion.major; |
361 |
memo.minorVersion = protocolVersion.minor; |
|
362 |
memo.encodeCipher = writeCipher; |
|
363 |
||
364 |
memo.fragment = new byte[1]; |
|
365 |
memo.fragment[0] = 1; |
|
366 |
||
367 |
handshakeMemos.add(memo); |
|
368 |
} |
|
369 |
||
56542 | 370 |
void queueUpAlert(byte level, byte description) { |
371 |
RecordMemo memo = new RecordMemo(); |
|
372 |
||
373 |
memo.contentType = ContentType.ALERT.id; |
|
374 |
memo.majorVersion = protocolVersion.major; |
|
375 |
memo.minorVersion = protocolVersion.minor; |
|
376 |
memo.encodeCipher = writeCipher; |
|
377 |
||
378 |
memo.fragment = new byte[2]; |
|
379 |
memo.fragment[0] = level; |
|
380 |
memo.fragment[1] = description; |
|
381 |
||
382 |
handshakeMemos.add(memo); |
|
383 |
} |
|
384 |
||
30904 | 385 |
Ciphertext acquireCiphertext(ByteBuffer dstBuf) throws IOException { |
386 |
if (isEmpty()) { |
|
387 |
return null; |
|
388 |
} |
|
389 |
||
390 |
RecordMemo memo = handshakeMemos.getFirst(); |
|
391 |
HandshakeMemo hsMemo = null; |
|
56542 | 392 |
if (memo.contentType == ContentType.HANDSHAKE.id) { |
30904 | 393 |
hsMemo = (HandshakeMemo)memo; |
394 |
} |
|
395 |
||
396 |
// ChangeCipherSpec message is pretty small. Don't worry about |
|
397 |
// the fragmentation of ChangeCipherSpec record. |
|
398 |
int fragLen; |
|
399 |
if (packetSize > 0) { |
|
400 |
fragLen = Math.min(maxRecordSize, packetSize); |
|
401 |
fragLen = memo.encodeCipher.calculateFragmentSize( |
|
56542 | 402 |
fragLen, headerSize); |
30904 | 403 |
} else { |
404 |
fragLen = Record.maxDataSize; |
|
405 |
} |
|
406 |
||
407 |
if (fragmentSize > 0) { |
|
408 |
fragLen = Math.min(fragLen, fragmentSize); |
|
409 |
} |
|
410 |
||
411 |
int dstPos = dstBuf.position(); |
|
412 |
int dstLim = dstBuf.limit(); |
|
413 |
int dstContent = dstPos + headerSize + |
|
414 |
memo.encodeCipher.getExplicitNonceSize(); |
|
415 |
dstBuf.position(dstContent); |
|
416 |
||
417 |
if (hsMemo != null) { |
|
418 |
int remainingFragLen = fragLen; |
|
419 |
while ((remainingFragLen > 0) && !handshakeMemos.isEmpty()) { |
|
420 |
int memoFragLen = hsMemo.fragment.length; |
|
421 |
if (hsMemo.acquireOffset == 0) { |
|
422 |
// Don't fragment handshake message header |
|
423 |
if (remainingFragLen <= 4) { |
|
424 |
break; |
|
425 |
} |
|
426 |
||
427 |
dstBuf.put(hsMemo.handshakeType); |
|
428 |
dstBuf.put((byte)((memoFragLen >> 16) & 0xFF)); |
|
429 |
dstBuf.put((byte)((memoFragLen >> 8) & 0xFF)); |
|
430 |
dstBuf.put((byte)(memoFragLen & 0xFF)); |
|
431 |
||
432 |
remainingFragLen -= 4; |
|
433 |
} // Otherwise, handshake message is fragmented. |
|
434 |
||
435 |
int chipLen = Math.min(remainingFragLen, |
|
436 |
(memoFragLen - hsMemo.acquireOffset)); |
|
437 |
dstBuf.put(hsMemo.fragment, hsMemo.acquireOffset, chipLen); |
|
438 |
||
439 |
hsMemo.acquireOffset += chipLen; |
|
440 |
if (hsMemo.acquireOffset == memoFragLen) { |
|
441 |
handshakeMemos.removeFirst(); |
|
442 |
||
443 |
// still have space for more records? |
|
444 |
if ((remainingFragLen > chipLen) && |
|
445 |
!handshakeMemos.isEmpty()) { |
|
446 |
||
447 |
// look for the next buffered record fragment |
|
56542 | 448 |
RecordMemo rm = handshakeMemos.getFirst(); |
449 |
if (rm.contentType == ContentType.HANDSHAKE.id && |
|
450 |
rm.encodeCipher == hsMemo.encodeCipher) { |
|
451 |
hsMemo = (HandshakeMemo)rm; |
|
30904 | 452 |
} else { |
56542 | 453 |
// not of the flight, break the loop |
30904 | 454 |
break; |
455 |
} |
|
456 |
} |
|
457 |
} |
|
458 |
||
459 |
remainingFragLen -= chipLen; |
|
460 |
} |
|
461 |
||
462 |
fragLen -= remainingFragLen; |
|
463 |
} else { |
|
464 |
fragLen = Math.min(fragLen, memo.fragment.length); |
|
465 |
dstBuf.put(memo.fragment, 0, fragLen); |
|
466 |
||
467 |
handshakeMemos.removeFirst(); |
|
468 |
} |
|
469 |
||
470 |
dstBuf.limit(dstBuf.position()); |
|
471 |
dstBuf.position(dstContent); |
|
472 |
||
56542 | 473 |
if (SSLLogger.isOn && SSLLogger.isOn("record")) { |
474 |
SSLLogger.fine( |
|
475 |
"WRITE: " + protocolVersion + " " + |
|
476 |
ContentType.nameOf(memo.contentType) + |
|
30904 | 477 |
", length = " + dstBuf.remaining()); |
478 |
} |
|
479 |
||
480 |
// Encrypt the fragment and wrap up a record. |
|
56542 | 481 |
long recordSN = encrypt( |
482 |
memo.encodeCipher, |
|
30904 | 483 |
memo.contentType, dstBuf, |
484 |
dstPos, dstLim, headerSize, |
|
485 |
ProtocolVersion.valueOf(memo.majorVersion, |
|
56542 | 486 |
memo.minorVersion)); |
30904 | 487 |
|
56542 | 488 |
if (SSLLogger.isOn && SSLLogger.isOn("packet")) { |
30904 | 489 |
ByteBuffer temporary = dstBuf.duplicate(); |
490 |
temporary.limit(temporary.position()); |
|
491 |
temporary.position(dstPos); |
|
56542 | 492 |
SSLLogger.fine("Raw write", temporary); |
30904 | 493 |
} |
494 |
||
495 |
// remain the limit unchanged |
|
496 |
dstBuf.limit(dstLim); |
|
497 |
||
498 |
// Reset the fragmentation offset. |
|
499 |
if (hsMemo != null) { |
|
56542 | 500 |
return new Ciphertext(hsMemo.contentType, |
501 |
hsMemo.handshakeType, recordSN); |
|
30904 | 502 |
} else { |
56542 | 503 |
if (isCloseWaiting && |
504 |
memo.contentType == ContentType.ALERT.id) { |
|
505 |
close(); |
|
506 |
} |
|
507 |
||
508 |
return new Ciphertext(memo.contentType, |
|
509 |
SSLHandshake.NOT_APPLICABLE.id, recordSN); |
|
30904 | 510 |
} |
511 |
} |
|
512 |
||
513 |
boolean isEmpty() { |
|
514 |
return handshakeMemos.isEmpty(); |
|
515 |
} |
|
56542 | 516 |
|
517 |
boolean hasAlert() { |
|
518 |
for (RecordMemo memo : handshakeMemos) { |
|
519 |
if (memo.contentType == ContentType.ALERT.id) { |
|
520 |
return true; |
|
521 |
} |
|
522 |
} |
|
523 |
||
524 |
return false; |
|
525 |
} |
|
2 | 526 |
} |
527 |
||
528 |
/* |
|
30904 | 529 |
* Need to split the payload except the following cases: |
530 |
* |
|
531 |
* 1. protocol version is TLS 1.1 or later; |
|
532 |
* 2. bulk cipher does not use CBC mode, including null bulk cipher suites. |
|
533 |
* 3. the payload is the first application record of a freshly |
|
534 |
* negotiated TLS session. |
|
535 |
* 4. the CBC protection is disabled; |
|
536 |
* |
|
537 |
* By default, we counter chosen plaintext issues on CBC mode |
|
538 |
* ciphersuites in SSLv3/TLS1.0 by sending one byte of application |
|
539 |
* data in the first record of every payload, and the rest in |
|
540 |
* subsequent record(s). Note that the issues have been solved in |
|
541 |
* TLS 1.1 or later. |
|
542 |
* |
|
543 |
* It is not necessary to split the very first application record of |
|
544 |
* a freshly negotiated TLS session, as there is no previous |
|
545 |
* application data to guess. To improve compatibility, we will not |
|
546 |
* split such records. |
|
547 |
* |
|
548 |
* This avoids issues in the outbound direction. For a full fix, |
|
549 |
* the peer must have similar protections. |
|
2 | 550 |
*/ |
30904 | 551 |
boolean needToSplitPayload() { |
552 |
return (!protocolVersion.useTLS11PlusSpec()) && |
|
553 |
writeCipher.isCBCMode() && !isFirstAppOutputRecord && |
|
554 |
Record.enableCBCProtection; |
|
2 | 555 |
} |
556 |
} |