author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 34687 | jdk/src/java.base/share/classes/sun/security/ssl/SSLEngineOutputRecord.java@d302ed125dc9 |
child 50768 | 68fa3d4026ea |
child 56542 | 56aaa6cb3693 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1996, 2015, 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.*; |
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import java.nio.*; |
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30904 | 30 |
import java.util.*; |
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import javax.net.ssl.SSLException; |
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import javax.net.ssl.SSLHandshakeException; |
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34 |
import sun.security.util.HexDumpEncoder; |
30904 | 35 |
import static sun.security.ssl.Ciphertext.RecordType; |
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/** |
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30904 | 38 |
* {@code OutputRecord} implementation for {@code SSLEngine}. |
2 | 39 |
*/ |
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final class SSLEngineOutputRecord extends OutputRecord implements SSLRecord { |
41 |
||
42 |
private HandshakeFragment fragmenter = null; |
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43 |
private LinkedList<RecordMemo> alertMemos = new LinkedList<>(); |
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44 |
private boolean isTalkingToV2 = false; // SSLv2Hello |
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45 |
private ByteBuffer v2ClientHello = null; // SSLv2Hello |
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||
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private boolean isCloseWaiting = false; |
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48 |
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SSLEngineOutputRecord() { |
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50 |
this.writeAuthenticator = MAC.TLS_NULL; |
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51 |
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52 |
this.packetSize = SSLRecord.maxRecordSize; |
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this.protocolVersion = ProtocolVersion.DEFAULT_TLS; |
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} |
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30904 | 56 |
@Override |
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public synchronized void close() throws IOException { |
30904 | 58 |
if (!isClosed) { |
59 |
if (alertMemos != null && !alertMemos.isEmpty()) { |
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60 |
isCloseWaiting = true; |
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61 |
} else { |
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super.close(); |
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} |
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} |
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} |
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66 |
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@Override |
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68 |
void encodeAlert(byte level, byte description) throws IOException { |
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RecordMemo memo = new RecordMemo(); |
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memo.contentType = Record.ct_alert; |
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memo.majorVersion = protocolVersion.major; |
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memo.minorVersion = protocolVersion.minor; |
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memo.encodeCipher = writeCipher; |
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memo.encodeAuthenticator = writeAuthenticator; |
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memo.fragment = new byte[2]; |
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memo.fragment[0] = level; |
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memo.fragment[1] = description; |
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alertMemos.add(memo); |
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} |
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@Override |
85 |
void encodeHandshake(byte[] source, |
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int offset, int length) throws IOException { |
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if (fragmenter == null) { |
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fragmenter = new HandshakeFragment(); |
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} |
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if (firstMessage) { |
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firstMessage = false; |
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30904 | 95 |
if ((helloVersion == ProtocolVersion.SSL20Hello) && |
96 |
(source[offset] == HandshakeMessage.ht_client_hello) && |
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// 5: recode header size |
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(source[offset + 4 + 2 + 32] == 0)) { |
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// V3 session ID is empty |
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// 4: handshake header size |
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// 2: client_version in ClientHello |
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// 32: random in ClientHello |
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// Double space should be big enough for the converted message. |
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v2ClientHello = encodeV2ClientHello( |
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source, (offset + 4), (length - 4)); |
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30904 | 108 |
v2ClientHello.position(2); // exclude the header |
109 |
handshakeHash.update(v2ClientHello); |
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v2ClientHello.position(0); |
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return; |
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} |
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} |
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byte handshakeType = source[offset]; |
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if (handshakeType != HandshakeMessage.ht_hello_request) { |
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handshakeHash.update(source, offset, length); |
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} |
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fragmenter.queueUpFragment(source, offset, length); |
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} |
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@Override |
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void encodeChangeCipherSpec() throws IOException { |
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if (fragmenter == null) { |
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fragmenter = new HandshakeFragment(); |
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} |
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fragmenter.queueUpChangeCipherSpec(); |
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} |
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@Override |
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void encodeV2NoCipher() throws IOException { |
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isTalkingToV2 = true; |
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} |
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@Override |
138 |
Ciphertext encode(ByteBuffer[] sources, int offset, int length, |
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ByteBuffer destination) throws IOException { |
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30904 | 141 |
if (writeAuthenticator.seqNumOverflow()) { |
142 |
if (debug != null && Debug.isOn("ssl")) { |
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System.out.println(Thread.currentThread().getName() + |
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", sequence number extremely close to overflow " + |
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"(2^64-1 packets). Closing connection."); |
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146 |
} |
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30904 | 148 |
throw new SSLHandshakeException("sequence number overflow"); |
149 |
} |
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int macLen = 0; |
152 |
if (writeAuthenticator instanceof MAC) { |
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macLen = ((MAC)writeAuthenticator).MAClen(); |
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} |
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30904 | 156 |
int dstLim = destination.limit(); |
157 |
boolean isFirstRecordOfThePayload = true; |
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int packetLeftSize = Math.min(maxRecordSize, packetSize); |
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boolean needMorePayload = true; |
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long recordSN = 0L; |
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161 |
while (needMorePayload) { |
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int fragLen; |
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if (isFirstRecordOfThePayload && needToSplitPayload()) { |
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needMorePayload = true; |
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fragLen = 1; |
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isFirstRecordOfThePayload = false; |
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} else { |
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needMorePayload = false; |
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if (packetLeftSize > 0) { |
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fragLen = writeCipher.calculateFragmentSize( |
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packetLeftSize, macLen, headerSize); |
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fragLen = Math.min(fragLen, Record.maxDataSize); |
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} else { |
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fragLen = Record.maxDataSize; |
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} |
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if (fragmentSize > 0) { |
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fragLen = Math.min(fragLen, fragmentSize); |
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} |
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} |
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int dstPos = destination.position(); |
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int dstContent = dstPos + headerSize + |
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writeCipher.getExplicitNonceSize(); |
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destination.position(dstContent); |
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int remains = Math.min(fragLen, destination.remaining()); |
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fragLen = 0; |
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int srcsLen = offset + length; |
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for (int i = offset; (i < srcsLen) && (remains > 0); i++) { |
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int amount = Math.min(sources[i].remaining(), remains); |
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int srcLimit = sources[i].limit(); |
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sources[i].limit(sources[i].position() + amount); |
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destination.put(sources[i]); |
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sources[i].limit(srcLimit); // restore the limit |
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remains -= amount; |
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fragLen += amount; |
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if (remains > 0) { |
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offset++; |
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length--; |
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} |
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} |
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destination.limit(destination.position()); |
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destination.position(dstContent); |
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if ((debug != null) && Debug.isOn("record")) { |
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System.out.println(Thread.currentThread().getName() + |
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", WRITE: " + protocolVersion + " " + |
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Record.contentName(Record.ct_application_data) + |
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", length = " + destination.remaining()); |
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} |
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// Encrypt the fragment and wrap up a record. |
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recordSN = encrypt(writeAuthenticator, writeCipher, |
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Record.ct_application_data, destination, |
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dstPos, dstLim, headerSize, |
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protocolVersion, false); |
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if ((debug != null) && Debug.isOn("packet")) { |
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ByteBuffer temporary = destination.duplicate(); |
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temporary.limit(temporary.position()); |
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temporary.position(dstPos); |
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Debug.printHex( |
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"[Raw write]: length = " + temporary.remaining(), |
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temporary); |
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} |
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packetLeftSize -= destination.position() - dstPos; |
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// remain the limit unchanged |
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destination.limit(dstLim); |
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if (isFirstAppOutputRecord) { |
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isFirstAppOutputRecord = false; |
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} |
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} |
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return new Ciphertext(RecordType.RECORD_APPLICATION_DATA, recordSN); |
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} |
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246 |
@Override |
30904 | 247 |
Ciphertext acquireCiphertext(ByteBuffer destination) throws IOException { |
248 |
if (isTalkingToV2) { // SSLv2Hello |
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// We don't support SSLv2. Send an SSLv2 error message |
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// so that the connection can be closed gracefully. |
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// |
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// Please don't change the limit of the destination buffer. |
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destination.put(SSLRecord.v2NoCipher); |
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if (debug != null && Debug.isOn("packet")) { |
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Debug.printHex( |
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"[Raw write]: length = " + SSLRecord.v2NoCipher.length, |
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SSLRecord.v2NoCipher); |
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} |
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260 |
isTalkingToV2 = false; |
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262 |
return new Ciphertext(RecordType.RECORD_ALERT, -1L); |
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} |
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if (v2ClientHello != null) { |
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// deliver the SSLv2 format ClientHello message |
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// |
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// Please don't change the limit of the destination buffer. |
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if (debug != null) { |
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if (Debug.isOn("record")) { |
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System.out.println(Thread.currentThread().getName() + |
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", WRITE: SSLv2 ClientHello message" + |
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", length = " + v2ClientHello.remaining()); |
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} |
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276 |
if (Debug.isOn("packet")) { |
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Debug.printHex( |
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"[Raw write]: length = " + v2ClientHello.remaining(), |
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v2ClientHello); |
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} |
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} |
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destination.put(v2ClientHello); |
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v2ClientHello = null; |
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return new Ciphertext(RecordType.RECORD_CLIENT_HELLO, -1L); |
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} |
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289 |
if (alertMemos != null && !alertMemos.isEmpty()) { |
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RecordMemo memo = alertMemos.pop(); |
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292 |
int macLen = 0; |
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293 |
if (memo.encodeAuthenticator instanceof MAC) { |
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macLen = ((MAC)memo.encodeAuthenticator).MAClen(); |
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} |
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297 |
int dstPos = destination.position(); |
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int dstLim = destination.limit(); |
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int dstContent = dstPos + headerSize + |
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writeCipher.getExplicitNonceSize(); |
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destination.position(dstContent); |
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destination.put(memo.fragment); |
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destination.limit(destination.position()); |
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destination.position(dstContent); |
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if ((debug != null) && Debug.isOn("record")) { |
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System.out.println(Thread.currentThread().getName() + |
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", WRITE: " + protocolVersion + " " + |
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Record.contentName(Record.ct_alert) + |
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", length = " + destination.remaining()); |
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} |
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314 |
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315 |
// Encrypt the fragment and wrap up a record. |
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long recordSN = encrypt(memo.encodeAuthenticator, memo.encodeCipher, |
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Record.ct_alert, destination, dstPos, dstLim, headerSize, |
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ProtocolVersion.valueOf(memo.majorVersion, |
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memo.minorVersion), false); |
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320 |
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321 |
if ((debug != null) && Debug.isOn("packet")) { |
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322 |
ByteBuffer temporary = destination.duplicate(); |
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323 |
temporary.limit(temporary.position()); |
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324 |
temporary.position(dstPos); |
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325 |
Debug.printHex( |
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326 |
"[Raw write]: length = " + temporary.remaining(), |
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327 |
temporary); |
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328 |
} |
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329 |
||
330 |
// remain the limit unchanged |
|
331 |
destination.limit(dstLim); |
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332 |
||
333 |
if (isCloseWaiting && (memo.contentType == Record.ct_alert)) { |
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334 |
isCloseWaiting = true; |
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335 |
close(); |
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336 |
} |
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337 |
return new Ciphertext(RecordType.RECORD_ALERT, recordSN); |
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338 |
} |
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339 |
||
340 |
if (fragmenter != null) { |
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341 |
return fragmenter.acquireCiphertext(destination); |
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342 |
} |
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343 |
||
344 |
return null; |
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} |
346 |
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30904 | 347 |
@Override |
348 |
boolean isEmpty() { |
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349 |
return (!isTalkingToV2) && (v2ClientHello == null) && |
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350 |
((fragmenter == null) || fragmenter.isEmpty()) && |
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351 |
((alertMemos == null) || alertMemos.isEmpty()); |
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352 |
} |
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353 |
||
354 |
// buffered record fragment |
|
355 |
private static class RecordMemo { |
|
356 |
byte contentType; |
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357 |
byte majorVersion; |
|
358 |
byte minorVersion; |
|
359 |
CipherBox encodeCipher; |
|
360 |
Authenticator encodeAuthenticator; |
|
361 |
||
362 |
byte[] fragment; |
|
363 |
} |
|
364 |
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365 |
private static class HandshakeMemo extends RecordMemo { |
|
366 |
byte handshakeType; |
|
367 |
int acquireOffset; |
|
2 | 368 |
} |
369 |
||
30904 | 370 |
final class HandshakeFragment { |
371 |
private LinkedList<RecordMemo> handshakeMemos = new LinkedList<>(); |
|
372 |
||
373 |
void queueUpFragment(byte[] source, |
|
374 |
int offset, int length) throws IOException { |
|
375 |
||
376 |
HandshakeMemo memo = new HandshakeMemo(); |
|
377 |
||
378 |
memo.contentType = Record.ct_handshake; |
|
379 |
memo.majorVersion = protocolVersion.major; // kick start version? |
|
380 |
memo.minorVersion = protocolVersion.minor; |
|
381 |
memo.encodeCipher = writeCipher; |
|
382 |
memo.encodeAuthenticator = writeAuthenticator; |
|
383 |
||
384 |
memo.handshakeType = source[offset]; |
|
385 |
memo.acquireOffset = 0; |
|
386 |
memo.fragment = new byte[length - 4]; // 4: header size |
|
387 |
// 1: HandshakeType |
|
388 |
// 3: message length |
|
389 |
System.arraycopy(source, offset + 4, memo.fragment, 0, length - 4); |
|
390 |
||
391 |
handshakeMemos.add(memo); |
|
392 |
} |
|
393 |
||
394 |
void queueUpChangeCipherSpec() { |
|
395 |
RecordMemo memo = new RecordMemo(); |
|
396 |
||
397 |
memo.contentType = Record.ct_change_cipher_spec; |
|
398 |
memo.majorVersion = protocolVersion.major; |
|
399 |
memo.minorVersion = protocolVersion.minor; |
|
400 |
memo.encodeCipher = writeCipher; |
|
401 |
memo.encodeAuthenticator = writeAuthenticator; |
|
402 |
||
403 |
memo.fragment = new byte[1]; |
|
404 |
memo.fragment[0] = 1; |
|
405 |
||
406 |
handshakeMemos.add(memo); |
|
407 |
} |
|
408 |
||
409 |
Ciphertext acquireCiphertext(ByteBuffer dstBuf) throws IOException { |
|
410 |
if (isEmpty()) { |
|
411 |
return null; |
|
412 |
} |
|
413 |
||
414 |
RecordMemo memo = handshakeMemos.getFirst(); |
|
415 |
HandshakeMemo hsMemo = null; |
|
416 |
if (memo.contentType == Record.ct_handshake) { |
|
417 |
hsMemo = (HandshakeMemo)memo; |
|
418 |
} |
|
419 |
||
420 |
int macLen = 0; |
|
421 |
if (memo.encodeAuthenticator instanceof MAC) { |
|
422 |
macLen = ((MAC)memo.encodeAuthenticator).MAClen(); |
|
423 |
} |
|
424 |
||
425 |
// ChangeCipherSpec message is pretty small. Don't worry about |
|
426 |
// the fragmentation of ChangeCipherSpec record. |
|
427 |
int fragLen; |
|
428 |
if (packetSize > 0) { |
|
429 |
fragLen = Math.min(maxRecordSize, packetSize); |
|
430 |
fragLen = memo.encodeCipher.calculateFragmentSize( |
|
431 |
fragLen, macLen, headerSize); |
|
432 |
} else { |
|
433 |
fragLen = Record.maxDataSize; |
|
434 |
} |
|
435 |
||
436 |
if (fragmentSize > 0) { |
|
437 |
fragLen = Math.min(fragLen, fragmentSize); |
|
438 |
} |
|
439 |
||
440 |
int dstPos = dstBuf.position(); |
|
441 |
int dstLim = dstBuf.limit(); |
|
442 |
int dstContent = dstPos + headerSize + |
|
443 |
memo.encodeCipher.getExplicitNonceSize(); |
|
444 |
dstBuf.position(dstContent); |
|
445 |
||
446 |
if (hsMemo != null) { |
|
447 |
int remainingFragLen = fragLen; |
|
448 |
while ((remainingFragLen > 0) && !handshakeMemos.isEmpty()) { |
|
449 |
int memoFragLen = hsMemo.fragment.length; |
|
450 |
if (hsMemo.acquireOffset == 0) { |
|
451 |
// Don't fragment handshake message header |
|
452 |
if (remainingFragLen <= 4) { |
|
453 |
break; |
|
454 |
} |
|
455 |
||
456 |
dstBuf.put(hsMemo.handshakeType); |
|
457 |
dstBuf.put((byte)((memoFragLen >> 16) & 0xFF)); |
|
458 |
dstBuf.put((byte)((memoFragLen >> 8) & 0xFF)); |
|
459 |
dstBuf.put((byte)(memoFragLen & 0xFF)); |
|
460 |
||
461 |
remainingFragLen -= 4; |
|
462 |
} // Otherwise, handshake message is fragmented. |
|
463 |
||
464 |
int chipLen = Math.min(remainingFragLen, |
|
465 |
(memoFragLen - hsMemo.acquireOffset)); |
|
466 |
dstBuf.put(hsMemo.fragment, hsMemo.acquireOffset, chipLen); |
|
467 |
||
468 |
hsMemo.acquireOffset += chipLen; |
|
469 |
if (hsMemo.acquireOffset == memoFragLen) { |
|
470 |
handshakeMemos.removeFirst(); |
|
471 |
||
472 |
// still have space for more records? |
|
473 |
if ((remainingFragLen > chipLen) && |
|
474 |
!handshakeMemos.isEmpty()) { |
|
475 |
||
476 |
// look for the next buffered record fragment |
|
477 |
RecordMemo reMemo = handshakeMemos.getFirst(); |
|
478 |
if (reMemo.contentType == Record.ct_handshake) { |
|
479 |
hsMemo = (HandshakeMemo)reMemo; |
|
480 |
} else { |
|
481 |
// not handshake message, break the loop |
|
482 |
break; |
|
483 |
} |
|
484 |
} |
|
485 |
} |
|
486 |
||
487 |
remainingFragLen -= chipLen; |
|
488 |
} |
|
489 |
||
490 |
fragLen -= remainingFragLen; |
|
491 |
} else { |
|
492 |
fragLen = Math.min(fragLen, memo.fragment.length); |
|
493 |
dstBuf.put(memo.fragment, 0, fragLen); |
|
494 |
||
495 |
handshakeMemos.removeFirst(); |
|
496 |
} |
|
497 |
||
498 |
dstBuf.limit(dstBuf.position()); |
|
499 |
dstBuf.position(dstContent); |
|
500 |
||
501 |
if ((debug != null) && Debug.isOn("record")) { |
|
502 |
System.out.println(Thread.currentThread().getName() + |
|
503 |
", WRITE: " + protocolVersion + " " + |
|
504 |
Record.contentName(memo.contentType) + |
|
505 |
", length = " + dstBuf.remaining()); |
|
506 |
} |
|
507 |
||
508 |
// Encrypt the fragment and wrap up a record. |
|
509 |
long recordSN = encrypt(memo.encodeAuthenticator, memo.encodeCipher, |
|
510 |
memo.contentType, dstBuf, |
|
511 |
dstPos, dstLim, headerSize, |
|
512 |
ProtocolVersion.valueOf(memo.majorVersion, |
|
513 |
memo.minorVersion), false); |
|
514 |
||
515 |
if ((debug != null) && Debug.isOn("packet")) { |
|
516 |
ByteBuffer temporary = dstBuf.duplicate(); |
|
517 |
temporary.limit(temporary.position()); |
|
518 |
temporary.position(dstPos); |
|
519 |
Debug.printHex( |
|
520 |
"[Raw write]: length = " + temporary.remaining(), |
|
521 |
temporary); |
|
522 |
} |
|
523 |
||
524 |
// remain the limit unchanged |
|
525 |
dstBuf.limit(dstLim); |
|
526 |
||
527 |
// Reset the fragmentation offset. |
|
528 |
if (hsMemo != null) { |
|
529 |
return new Ciphertext(RecordType.valueOf( |
|
530 |
hsMemo.contentType, hsMemo.handshakeType), recordSN); |
|
531 |
} else { |
|
532 |
return new Ciphertext( |
|
533 |
RecordType.RECORD_CHANGE_CIPHER_SPEC, recordSN); |
|
534 |
} |
|
535 |
} |
|
536 |
||
537 |
boolean isEmpty() { |
|
538 |
return handshakeMemos.isEmpty(); |
|
539 |
} |
|
2 | 540 |
} |
541 |
||
542 |
/* |
|
30904 | 543 |
* Need to split the payload except the following cases: |
544 |
* |
|
545 |
* 1. protocol version is TLS 1.1 or later; |
|
546 |
* 2. bulk cipher does not use CBC mode, including null bulk cipher suites. |
|
547 |
* 3. the payload is the first application record of a freshly |
|
548 |
* negotiated TLS session. |
|
549 |
* 4. the CBC protection is disabled; |
|
550 |
* |
|
551 |
* By default, we counter chosen plaintext issues on CBC mode |
|
552 |
* ciphersuites in SSLv3/TLS1.0 by sending one byte of application |
|
553 |
* data in the first record of every payload, and the rest in |
|
554 |
* subsequent record(s). Note that the issues have been solved in |
|
555 |
* TLS 1.1 or later. |
|
556 |
* |
|
557 |
* It is not necessary to split the very first application record of |
|
558 |
* a freshly negotiated TLS session, as there is no previous |
|
559 |
* application data to guess. To improve compatibility, we will not |
|
560 |
* split such records. |
|
561 |
* |
|
562 |
* This avoids issues in the outbound direction. For a full fix, |
|
563 |
* the peer must have similar protections. |
|
2 | 564 |
*/ |
30904 | 565 |
boolean needToSplitPayload() { |
566 |
return (!protocolVersion.useTLS11PlusSpec()) && |
|
567 |
writeCipher.isCBCMode() && !isFirstAppOutputRecord && |
|
568 |
Record.enableCBCProtection; |
|
2 | 569 |
} |
570 |
} |