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/*
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* Copyright (c) 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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import java.util.*;
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import javax.crypto.BadPaddingException;
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import javax.net.ssl.*;
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import sun.misc.HexDumpEncoder;
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import static sun.security.ssl.HandshakeMessage.*;
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/**
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* DTLS {@code InputRecord} implementation for {@code SSLEngine}.
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*/
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final class DTLSInputRecord extends InputRecord implements DTLSRecord {
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private DTLSReassembler reassembler = null;
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// Cache the session identifier for the detection of session-resuming
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// handshake.
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byte[] prevSessionID = new byte[0];
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int readEpoch;
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int prevReadEpoch;
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Authenticator prevReadAuthenticator;
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CipherBox prevReadCipher;
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DTLSInputRecord() {
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this.readEpoch = 0;
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this.readAuthenticator = new MAC(true);
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this.prevReadEpoch = 0;
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this.prevReadCipher = CipherBox.NULL;
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this.prevReadAuthenticator = new MAC(true);
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}
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@Override
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void changeReadCiphers(Authenticator readAuthenticator,
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CipherBox readCipher) {
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prevReadCipher.dispose();
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this.prevReadAuthenticator = this.readAuthenticator;
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this.prevReadCipher = this.readCipher;
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this.prevReadEpoch = this.readEpoch;
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this.readAuthenticator = readAuthenticator;
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this.readCipher = readCipher;
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this.readEpoch++;
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}
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@Override
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synchronized public void close() throws IOException {
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if (!isClosed) {
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prevReadCipher.dispose();
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super.close();
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}
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}
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@Override
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boolean isEmpty() {
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return ((reassembler == null) || reassembler.isEmpty());
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}
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@Override
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int estimateFragmentSize(int packetSize) {
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int macLen = 0;
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if (readAuthenticator instanceof MAC) {
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macLen = ((MAC)readAuthenticator).MAClen();
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}
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if (packetSize > 0) {
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return readCipher.estimateFragmentSize(
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packetSize, macLen, headerSize);
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} else {
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return Record.maxDataSize;
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}
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}
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@Override
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void expectingFinishFlight() {
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if (reassembler != null) {
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reassembler.expectingFinishFlight();
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}
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}
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@Override
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Plaintext acquirePlaintext() {
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if (reassembler != null) {
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Plaintext plaintext = reassembler.acquirePlaintext();
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if (reassembler.finished()) {
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// discard all buffered unused message.
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reassembler = null;
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}
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return plaintext;
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}
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return null;
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}
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@Override
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Plaintext decode(ByteBuffer packet) {
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if (isClosed) {
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return null;
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}
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if (debug != null && Debug.isOn("packet")) {
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Debug.printHex(
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"[Raw read]: length = " + packet.remaining(), packet);
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}
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// The caller should have validated the record.
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int srcPos = packet.position();
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int srcLim = packet.limit();
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byte contentType = packet.get(); // pos: 0
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byte majorVersion = packet.get(); // pos: 1
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byte minorVersion = packet.get(); // pos: 2
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byte[] recordEnS = new byte[8]; // epoch + seqence
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packet.get(recordEnS);
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int recordEpoch = ((recordEnS[0] & 0xFF) << 8) |
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(recordEnS[1] & 0xFF); // pos: 3, 4
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long recordSeq = Authenticator.toLong(recordEnS);
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int contentLen = ((packet.get() & 0xFF) << 8) |
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(packet.get() & 0xFF); // pos: 11, 12
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if (debug != null && Debug.isOn("record")) {
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System.out.println(Thread.currentThread().getName() +
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", READ: " +
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ProtocolVersion.valueOf(majorVersion, minorVersion) +
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" " + Record.contentName(contentType) + ", length = " +
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contentLen);
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}
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int recLim = srcPos + DTLSRecord.headerSize + contentLen;
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if (this.readEpoch > recordEpoch) {
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// Discard old records delivered before this epoch.
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// Reset the position of the packet buffer.
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packet.position(recLim);
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return null;
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}
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if (this.readEpoch < recordEpoch) {
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if (contentType != Record.ct_handshake) {
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// just discard it if not a handshake message
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packet.position(recLim);
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return null;
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}
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// Not ready to decrypt this record, may be encrypted Finished
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// message, need to buffer it.
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if (reassembler == null) {
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reassembler = new DTLSReassembler();
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}
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byte[] fragment = new byte[contentLen];
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packet.get(fragment); // copy the fragment
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RecordFragment buffered = new RecordFragment(fragment, contentType,
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majorVersion, minorVersion,
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recordEnS, recordEpoch, recordSeq, true);
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reassembler.queueUpFragment(buffered);
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// consume the full record in the packet buffer.
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packet.position(recLim);
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Plaintext plaintext = reassembler.acquirePlaintext();
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if (reassembler.finished()) {
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// discard all buffered unused message.
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reassembler = null;
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}
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return plaintext;
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}
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if (this.readEpoch == recordEpoch) {
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// decrypt the fragment
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packet.limit(recLim);
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packet.position(srcPos + DTLSRecord.headerSize);
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ByteBuffer plaintextFragment;
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try {
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plaintextFragment = decrypt(readAuthenticator,
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readCipher, contentType, packet, recordEnS);
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} catch (BadPaddingException bpe) {
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if (debug != null && Debug.isOn("ssl")) {
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System.out.println(Thread.currentThread().getName() +
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" discard invalid record: " + bpe);
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}
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// invalid, discard this record [section 4.1.2.7, RFC 6347]
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return null;
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} finally {
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// comsume a complete record
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packet.limit(srcLim);
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packet.position(recLim);
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}
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if (contentType != Record.ct_change_cipher_spec &&
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contentType != Record.ct_handshake) { // app data or alert
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// no retransmission
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return new Plaintext(contentType, majorVersion, minorVersion,
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recordEpoch, recordSeq, plaintextFragment);
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}
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if (contentType == Record.ct_change_cipher_spec) {
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if (reassembler == null) {
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// handshake has not started, should be an
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// old handshake message, discard it.
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return null;
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}
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reassembler.queueUpFragment(
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new RecordFragment(plaintextFragment, contentType,
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majorVersion, minorVersion,
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recordEnS, recordEpoch, recordSeq, false));
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} else { // handshake record
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// One record may contain 1+ more handshake messages.
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while (plaintextFragment.remaining() > 0) {
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HandshakeFragment hsFrag = parseHandshakeMessage(
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contentType, majorVersion, minorVersion,
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recordEnS, recordEpoch, recordSeq, plaintextFragment);
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if (hsFrag == null) {
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// invalid, discard this record
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return null;
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}
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if ((reassembler == null) &&
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isKickstart(hsFrag.handshakeType)) {
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reassembler = new DTLSReassembler();
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}
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if (reassembler != null) {
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reassembler.queueUpHandshake(hsFrag);
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} // else, just ignore the message.
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}
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}
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// Completed the read of the full record. Acquire the reassembled
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// messages.
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if (reassembler != null) {
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Plaintext plaintext = reassembler.acquirePlaintext();
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if (reassembler.finished()) {
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// discard all buffered unused message.
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reassembler = null;
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}
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return plaintext;
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}
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}
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return null; // make the complier happy
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}
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@Override
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int bytesInCompletePacket(ByteBuffer packet) throws SSLException {
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// DTLS length field is in bytes 11/12
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if (packet.remaining() < headerSize) {
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return -1;
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}
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// Last sanity check that it's not a wild record
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int pos = packet.position();
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// Check the content type of the record.
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byte contentType = packet.get(pos);
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if (!Record.isValidContentType(contentType)) {
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throw new SSLException(
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"Unrecognized SSL message, plaintext connection?");
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}
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// Check the protocol version of the record.
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ProtocolVersion recordVersion =
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ProtocolVersion.valueOf(packet.get(pos + 1), packet.get(pos + 2));
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checkRecordVersion(recordVersion, false);
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// Get the fragment length of the record.
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int fragLen = ((packet.get(pos + 11) & 0xFF) << 8) +
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(packet.get(pos + 12) & 0xFF) + headerSize;
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if (fragLen > Record.maxFragmentSize) {
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throw new SSLException(
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"Record overflow, fragment length (" + fragLen +
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") MUST not exceed " + Record.maxFragmentSize);
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}
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return fragLen;
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}
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@Override
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void checkRecordVersion(ProtocolVersion recordVersion,
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boolean allowSSL20Hello) throws SSLException {
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if (!recordVersion.maybeDTLSProtocol()) {
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throw new SSLException(
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"Unrecognized record version " + recordVersion +
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" , plaintext connection?");
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}
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}
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private static boolean isKickstart(byte handshakeType) {
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return (handshakeType == HandshakeMessage.ht_client_hello) ||
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(handshakeType == HandshakeMessage.ht_hello_request) ||
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(handshakeType == HandshakeMessage.ht_hello_verify_request);
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}
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private static HandshakeFragment parseHandshakeMessage(
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byte contentType, byte majorVersion, byte minorVersion,
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byte[] recordEnS, int recordEpoch, long recordSeq,
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ByteBuffer plaintextFragment) {
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int remaining = plaintextFragment.remaining();
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if (remaining < handshakeHeaderSize) {
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if (debug != null && Debug.isOn("ssl")) {
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System.out.println(
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Thread.currentThread().getName() +
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" discard invalid record: " +
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"too small record to hold a handshake fragment");
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}
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// invalid, discard this record [section 4.1.2.7, RFC 6347]
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return null;
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}
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byte handshakeType = plaintextFragment.get(); // pos: 0
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int messageLength =
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((plaintextFragment.get() & 0xFF) << 16) |
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((plaintextFragment.get() & 0xFF) << 8) |
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(plaintextFragment.get() & 0xFF); // pos: 1-3
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int messageSeq =
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((plaintextFragment.get() & 0xFF) << 8) |
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(plaintextFragment.get() & 0xFF); // pos: 4/5
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int fragmentOffset =
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((plaintextFragment.get() & 0xFF) << 16) |
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((plaintextFragment.get() & 0xFF) << 8) |
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(plaintextFragment.get() & 0xFF); // pos: 6-8
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int fragmentLength =
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((plaintextFragment.get() & 0xFF) << 16) |
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((plaintextFragment.get() & 0xFF) << 8) |
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(plaintextFragment.get() & 0xFF); // pos: 9-11
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if ((remaining - handshakeHeaderSize) < fragmentLength) {
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if (debug != null && Debug.isOn("ssl")) {
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System.out.println(
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Thread.currentThread().getName() +
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" discard invalid record: " +
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"not a complete handshake fragment in the record");
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}
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// invalid, discard this record [section 4.1.2.7, RFC 6347]
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return null;
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}
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byte[] fragment = new byte[fragmentLength];
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plaintextFragment.get(fragment);
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return new HandshakeFragment(fragment, contentType,
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majorVersion, minorVersion,
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recordEnS, recordEpoch, recordSeq,
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handshakeType, messageLength,
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messageSeq, fragmentOffset, fragmentLength);
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}
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// buffered record fragment
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private static class RecordFragment implements Comparable<RecordFragment> {
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boolean isCiphertext;
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byte contentType;
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byte majorVersion;
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byte minorVersion;
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int recordEpoch;
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long recordSeq;
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byte[] recordEnS;
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byte[] fragment;
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RecordFragment(ByteBuffer fragBuf, byte contentType,
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byte majorVersion, byte minorVersion, byte[] recordEnS,
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int recordEpoch, long recordSeq, boolean isCiphertext) {
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this((byte[])null, contentType, majorVersion, minorVersion,
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recordEnS, recordEpoch, recordSeq, isCiphertext);
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this.fragment = new byte[fragBuf.remaining()];
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fragBuf.get(this.fragment);
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}
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RecordFragment(byte[] fragment, byte contentType,
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byte majorVersion, byte minorVersion, byte[] recordEnS,
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int recordEpoch, long recordSeq, boolean isCiphertext) {
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this.isCiphertext = isCiphertext;
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this.contentType = contentType;
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this.majorVersion = majorVersion;
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this.minorVersion = minorVersion;
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this.recordEpoch = recordEpoch;
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this.recordSeq = recordSeq;
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this.recordEnS = recordEnS;
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this.fragment = fragment; // The caller should have cloned
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// the buffer if necessary.
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}
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@Override
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public int compareTo(RecordFragment o) {
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|
434 |
return Long.compareUnsigned(this.recordSeq, o.recordSeq);
|
|
435 |
}
|
|
436 |
}
|
|
437 |
|
|
438 |
// buffered handshake message
|
|
439 |
private static final class HandshakeFragment extends RecordFragment {
|
|
440 |
|
|
441 |
byte handshakeType; // handshake msg_type
|
|
442 |
int messageSeq; // message_seq
|
|
443 |
int messageLength; // Handshake body length
|
|
444 |
int fragmentOffset; // fragment_offset
|
|
445 |
int fragmentLength; // fragment_length
|
|
446 |
|
|
447 |
HandshakeFragment(byte[] fragment, byte contentType,
|
|
448 |
byte majorVersion, byte minorVersion, byte[] recordEnS,
|
|
449 |
int recordEpoch, long recordSeq,
|
|
450 |
byte handshakeType, int messageLength,
|
|
451 |
int messageSeq, int fragmentOffset, int fragmentLength) {
|
|
452 |
|
|
453 |
super(fragment, contentType, majorVersion, minorVersion,
|
|
454 |
recordEnS, recordEpoch , recordSeq, false);
|
|
455 |
|
|
456 |
this.handshakeType = handshakeType;
|
|
457 |
this.messageSeq = messageSeq;
|
|
458 |
this.messageLength = messageLength;
|
|
459 |
this.fragmentOffset = fragmentOffset;
|
|
460 |
this.fragmentLength = fragmentLength;
|
|
461 |
}
|
|
462 |
|
|
463 |
@Override
|
|
464 |
public int compareTo(RecordFragment o) {
|
|
465 |
if (o instanceof HandshakeFragment) {
|
|
466 |
HandshakeFragment other = (HandshakeFragment)o;
|
|
467 |
if (this.messageSeq != other.messageSeq) {
|
|
468 |
// keep the insertion order for the same message
|
|
469 |
return this.messageSeq - other.messageSeq;
|
|
470 |
}
|
|
471 |
}
|
|
472 |
|
|
473 |
return Long.compareUnsigned(this.recordSeq, o.recordSeq);
|
|
474 |
}
|
|
475 |
}
|
|
476 |
|
|
477 |
private static final class HoleDescriptor {
|
|
478 |
int offset; // fragment_offset
|
|
479 |
int limit; // fragment_offset + fragment_length
|
|
480 |
|
|
481 |
HoleDescriptor(int offset, int limit) {
|
|
482 |
this.offset = offset;
|
|
483 |
this.limit = limit;
|
|
484 |
}
|
|
485 |
}
|
|
486 |
|
|
487 |
final class DTLSReassembler {
|
|
488 |
TreeSet<RecordFragment> bufferedFragments = new TreeSet<>();
|
|
489 |
|
|
490 |
HashMap<Byte, List<HoleDescriptor>> holesMap = new HashMap<>(5);
|
|
491 |
|
|
492 |
// Epoch, sequence number and handshake message sequence of the
|
|
493 |
// beginning message of a flight.
|
|
494 |
byte flightType = (byte)0xFF;
|
|
495 |
|
|
496 |
int flightTopEpoch = 0;
|
|
497 |
long flightTopRecordSeq = -1;
|
|
498 |
int flightTopMessageSeq = 0;
|
|
499 |
|
|
500 |
// Epoch, sequence number and handshake message sequence of the
|
|
501 |
// next message acquisition of a flight.
|
|
502 |
int nextRecordEpoch = 0; // next record epoch
|
|
503 |
long nextRecordSeq = 0; // next record sequence number
|
|
504 |
int nextMessageSeq = 0; // next handshake message number
|
|
505 |
|
|
506 |
// Expect ChangeCipherSpec and Finished messages for the final flight.
|
|
507 |
boolean expectCCSFlight = false;
|
|
508 |
|
|
509 |
// Ready to process this flight if received all messages of the flight.
|
|
510 |
boolean flightIsReady = false;
|
|
511 |
boolean needToCheckFlight = false;
|
|
512 |
|
|
513 |
// Is it a session-resuming abbreviated handshake.?
|
|
514 |
boolean isAbbreviatedHandshake = false;
|
|
515 |
|
|
516 |
// The handshke fragment with the biggest record sequence number
|
|
517 |
// in a flight, not counting the Finished message.
|
|
518 |
HandshakeFragment lastHandshakeFragment = null;
|
|
519 |
|
|
520 |
// Is handshake (intput) finished?
|
|
521 |
boolean handshakeFinished = false;
|
|
522 |
|
|
523 |
DTLSReassembler() {
|
|
524 |
// blank
|
|
525 |
}
|
|
526 |
|
|
527 |
boolean finished() {
|
|
528 |
return handshakeFinished;
|
|
529 |
}
|
|
530 |
|
|
531 |
void expectingFinishFlight() {
|
|
532 |
expectCCSFlight = true;
|
|
533 |
}
|
|
534 |
|
|
535 |
void queueUpHandshake(HandshakeFragment hsf) {
|
|
536 |
|
|
537 |
if ((nextRecordEpoch > hsf.recordEpoch) ||
|
|
538 |
(nextRecordSeq > hsf.recordSeq) ||
|
|
539 |
(nextMessageSeq > hsf.messageSeq)) {
|
|
540 |
// too old, discard this record
|
|
541 |
return;
|
|
542 |
}
|
|
543 |
|
|
544 |
// Is it the first message of next flight?
|
|
545 |
if ((flightTopMessageSeq == hsf.messageSeq) &&
|
|
546 |
(hsf.fragmentOffset == 0) && (flightTopRecordSeq == -1)) {
|
|
547 |
|
|
548 |
flightType = hsf.handshakeType;
|
|
549 |
flightTopEpoch = hsf.recordEpoch;
|
|
550 |
flightTopRecordSeq = hsf.recordSeq;
|
|
551 |
|
|
552 |
if (hsf.handshakeType == HandshakeMessage.ht_server_hello) {
|
|
553 |
// Is it a session-resuming handshake?
|
|
554 |
try {
|
|
555 |
isAbbreviatedHandshake =
|
|
556 |
isSessionResuming(hsf.fragment, prevSessionID);
|
|
557 |
} catch (SSLException ssle) {
|
|
558 |
if (debug != null && Debug.isOn("ssl")) {
|
|
559 |
System.out.println(
|
|
560 |
Thread.currentThread().getName() +
|
|
561 |
" discard invalid record: " + ssle);
|
|
562 |
}
|
|
563 |
|
|
564 |
// invalid, discard it [section 4.1.2.7, RFC 6347]
|
|
565 |
return;
|
|
566 |
}
|
|
567 |
|
|
568 |
if (!isAbbreviatedHandshake) {
|
|
569 |
prevSessionID = getSessionID(hsf.fragment);
|
|
570 |
}
|
|
571 |
}
|
|
572 |
}
|
|
573 |
|
|
574 |
boolean fragmented = false;
|
|
575 |
if ((hsf.fragmentOffset) != 0 ||
|
|
576 |
(hsf.fragmentLength != hsf.messageLength)) {
|
|
577 |
|
|
578 |
fragmented = true;
|
|
579 |
}
|
|
580 |
|
|
581 |
List<HoleDescriptor> holes = holesMap.get(hsf.handshakeType);
|
|
582 |
if (holes == null) {
|
|
583 |
if (!fragmented) {
|
|
584 |
holes = Collections.emptyList();
|
|
585 |
} else {
|
|
586 |
holes = new LinkedList<HoleDescriptor>();
|
|
587 |
holes.add(new HoleDescriptor(0, hsf.messageLength));
|
|
588 |
}
|
|
589 |
holesMap.put(hsf.handshakeType, holes);
|
|
590 |
} else if (holes.isEmpty()) {
|
|
591 |
// Have got the full handshake message. This record may be
|
|
592 |
// a handshake message retransmission. Discard this record.
|
|
593 |
//
|
|
594 |
// It's OK to discard retransmission as the handshake hash
|
|
595 |
// is computed as if each handshake message had been sent
|
|
596 |
// as a single fragment.
|
|
597 |
//
|
|
598 |
// Note that ClientHello messages are delivered twice in
|
|
599 |
// DTLS handshaking.
|
|
600 |
if ((hsf.handshakeType != HandshakeMessage.ht_client_hello &&
|
|
601 |
hsf.handshakeType != ht_hello_verify_request) ||
|
|
602 |
(nextMessageSeq != hsf.messageSeq)) {
|
|
603 |
return;
|
|
604 |
}
|
|
605 |
|
|
606 |
if (fragmented) {
|
|
607 |
holes = new LinkedList<HoleDescriptor>();
|
|
608 |
holes.add(new HoleDescriptor(0, hsf.messageLength));
|
|
609 |
}
|
|
610 |
holesMap.put(hsf.handshakeType, holes);
|
|
611 |
}
|
|
612 |
|
|
613 |
if (fragmented) {
|
|
614 |
int fragmentLimit = hsf.fragmentOffset + hsf.fragmentLength;
|
|
615 |
for (int i = 0; i < holes.size(); i++) {
|
|
616 |
|
|
617 |
HoleDescriptor hole = holes.get(i);
|
|
618 |
if ((hole.limit <= hsf.fragmentOffset) ||
|
|
619 |
(hole.offset >= fragmentLimit)) {
|
|
620 |
// Also discard overlapping handshake retransmissions.
|
|
621 |
continue;
|
|
622 |
}
|
|
623 |
|
|
624 |
// The ranges SHOULD NOT overlap.
|
|
625 |
if (((hole.offset > hsf.fragmentOffset) &&
|
|
626 |
(hole.offset < fragmentLimit)) ||
|
|
627 |
((hole.limit > hsf.fragmentOffset) &&
|
|
628 |
(hole.limit < fragmentLimit))) {
|
|
629 |
|
|
630 |
if (debug != null && Debug.isOn("ssl")) {
|
|
631 |
System.out.println(
|
|
632 |
Thread.currentThread().getName() +
|
|
633 |
" discard invalid record: " +
|
|
634 |
"handshake fragment ranges are overlapping");
|
|
635 |
}
|
|
636 |
|
|
637 |
// invalid, discard it [section 4.1.2.7, RFC 6347]
|
|
638 |
return;
|
|
639 |
}
|
|
640 |
|
|
641 |
// This record interacts with this hole, fill the hole.
|
|
642 |
holes.remove(i);
|
|
643 |
// i--;
|
|
644 |
|
|
645 |
if (hsf.fragmentOffset > hole.offset) {
|
|
646 |
holes.add(new HoleDescriptor(
|
|
647 |
hole.offset, hsf.fragmentOffset));
|
|
648 |
// i++;
|
|
649 |
}
|
|
650 |
|
|
651 |
if (fragmentLimit < hole.limit) {
|
|
652 |
holes.add(new HoleDescriptor(
|
|
653 |
fragmentLimit, hole.limit));
|
|
654 |
// i++;
|
|
655 |
}
|
|
656 |
|
|
657 |
// As no ranges overlap, no interact with other holes.
|
|
658 |
break;
|
|
659 |
}
|
|
660 |
}
|
|
661 |
|
|
662 |
// append this fragment
|
|
663 |
bufferedFragments.add(hsf);
|
|
664 |
|
|
665 |
if ((lastHandshakeFragment == null) ||
|
|
666 |
(lastHandshakeFragment.compareTo(hsf) < 0)) {
|
|
667 |
|
|
668 |
lastHandshakeFragment = hsf;
|
|
669 |
}
|
|
670 |
|
|
671 |
if (flightIsReady) {
|
|
672 |
flightIsReady = false;
|
|
673 |
}
|
|
674 |
needToCheckFlight = true;
|
|
675 |
}
|
|
676 |
|
|
677 |
// queue up change_cipher_spec or encrypted message
|
|
678 |
void queueUpFragment(RecordFragment rf) {
|
|
679 |
if ((nextRecordEpoch > rf.recordEpoch) ||
|
|
680 |
(nextRecordSeq > rf.recordSeq)) {
|
|
681 |
// too old, discard this record
|
|
682 |
return;
|
|
683 |
}
|
|
684 |
|
|
685 |
// Is it the first message of next flight?
|
|
686 |
if (expectCCSFlight &&
|
|
687 |
(rf.contentType == Record.ct_change_cipher_spec)) {
|
|
688 |
|
|
689 |
flightType = (byte)0xFE;
|
|
690 |
flightTopEpoch = rf.recordEpoch;
|
|
691 |
flightTopRecordSeq = rf.recordSeq;
|
|
692 |
}
|
|
693 |
|
|
694 |
// append this fragment
|
|
695 |
bufferedFragments.add(rf);
|
|
696 |
|
|
697 |
if (flightIsReady) {
|
|
698 |
flightIsReady = false;
|
|
699 |
}
|
|
700 |
needToCheckFlight = true;
|
|
701 |
}
|
|
702 |
|
|
703 |
boolean isEmpty() {
|
|
704 |
return (bufferedFragments.isEmpty() ||
|
|
705 |
(!flightIsReady && !needToCheckFlight) ||
|
|
706 |
(needToCheckFlight && !flightIsReady()));
|
|
707 |
}
|
|
708 |
|
|
709 |
Plaintext acquirePlaintext() {
|
|
710 |
if (bufferedFragments.isEmpty()) {
|
|
711 |
// reset the flight
|
|
712 |
if (flightIsReady) {
|
|
713 |
flightIsReady = false;
|
|
714 |
needToCheckFlight = false;
|
|
715 |
}
|
|
716 |
|
|
717 |
return null;
|
|
718 |
}
|
|
719 |
|
|
720 |
if (!flightIsReady && needToCheckFlight) {
|
|
721 |
// check the fligth status
|
|
722 |
flightIsReady = flightIsReady();
|
|
723 |
|
|
724 |
// set for next flight
|
|
725 |
if (flightIsReady) {
|
|
726 |
flightTopMessageSeq = lastHandshakeFragment.messageSeq + 1;
|
|
727 |
flightTopRecordSeq = -1;
|
|
728 |
}
|
|
729 |
|
|
730 |
needToCheckFlight = false;
|
|
731 |
}
|
|
732 |
|
|
733 |
if (!flightIsReady) {
|
|
734 |
return null;
|
|
735 |
}
|
|
736 |
|
|
737 |
RecordFragment rFrag = bufferedFragments.first();
|
|
738 |
if (!rFrag.isCiphertext) {
|
|
739 |
// handshake message, or ChangeCipherSpec message
|
|
740 |
return acquireHandshakeMessage();
|
|
741 |
} else {
|
|
742 |
// a Finished message or other ciphertexts
|
|
743 |
return acquireCachedMessage();
|
|
744 |
}
|
|
745 |
}
|
|
746 |
|
|
747 |
private Plaintext acquireCachedMessage() {
|
|
748 |
|
|
749 |
RecordFragment rFrag = bufferedFragments.first();
|
|
750 |
if (readEpoch != rFrag.recordEpoch) {
|
|
751 |
if (readEpoch > rFrag.recordEpoch) {
|
|
752 |
// discard old records
|
|
753 |
bufferedFragments.remove(rFrag); // popup the fragment
|
|
754 |
}
|
|
755 |
|
|
756 |
// reset the flight
|
|
757 |
if (flightIsReady) {
|
|
758 |
flightIsReady = false;
|
|
759 |
}
|
|
760 |
return null;
|
|
761 |
}
|
|
762 |
|
|
763 |
bufferedFragments.remove(rFrag); // popup the fragment
|
|
764 |
|
|
765 |
ByteBuffer fragment = ByteBuffer.wrap(rFrag.fragment);
|
|
766 |
ByteBuffer plaintextFragment = null;
|
|
767 |
try {
|
|
768 |
plaintextFragment = decrypt(readAuthenticator, readCipher,
|
|
769 |
rFrag.contentType, fragment, rFrag.recordEnS);
|
|
770 |
} catch (BadPaddingException bpe) {
|
|
771 |
if (debug != null && Debug.isOn("ssl")) {
|
|
772 |
System.out.println(Thread.currentThread().getName() +
|
|
773 |
" discard invalid record: " + bpe);
|
|
774 |
}
|
|
775 |
|
|
776 |
// invalid, discard this record [section 4.1.2.7, RFC 6347]
|
|
777 |
return null;
|
|
778 |
}
|
|
779 |
|
|
780 |
// The ciphtext handshake message can only be Finished (the
|
|
781 |
// end of this flight), ClinetHello or HelloRequest (the
|
|
782 |
// beginning of the next flight) message. Need not to check
|
|
783 |
// any ChangeCipherSpec message.
|
|
784 |
if (rFrag.contentType == Record.ct_handshake) {
|
|
785 |
HandshakeFragment finFrag = null;
|
|
786 |
while (plaintextFragment.remaining() > 0) {
|
|
787 |
HandshakeFragment hsFrag = parseHandshakeMessage(
|
|
788 |
rFrag.contentType,
|
|
789 |
rFrag.majorVersion, rFrag.minorVersion,
|
|
790 |
rFrag.recordEnS, rFrag.recordEpoch, rFrag.recordSeq,
|
|
791 |
plaintextFragment);
|
|
792 |
|
|
793 |
if (hsFrag == null) {
|
|
794 |
// invalid, discard this record
|
|
795 |
return null;
|
|
796 |
}
|
|
797 |
|
|
798 |
if (hsFrag.handshakeType == HandshakeMessage.ht_finished) {
|
|
799 |
finFrag = hsFrag;
|
|
800 |
|
|
801 |
// reset for the next flight
|
|
802 |
this.flightType = (byte)0xFF;
|
|
803 |
this.flightTopEpoch = rFrag.recordEpoch;
|
|
804 |
this.flightTopMessageSeq = hsFrag.messageSeq + 1;
|
|
805 |
this.flightTopRecordSeq = -1;
|
|
806 |
} else {
|
|
807 |
// reset the flight
|
|
808 |
if (flightIsReady) {
|
|
809 |
flightIsReady = false;
|
|
810 |
}
|
|
811 |
queueUpHandshake(hsFrag);
|
|
812 |
}
|
|
813 |
}
|
|
814 |
|
|
815 |
this.nextRecordSeq = rFrag.recordSeq + 1;
|
|
816 |
this.nextMessageSeq = 0;
|
|
817 |
|
|
818 |
if (finFrag != null) {
|
|
819 |
this.nextRecordEpoch = finFrag.recordEpoch;
|
|
820 |
this.nextRecordSeq = finFrag.recordSeq + 1;
|
|
821 |
this.nextMessageSeq = finFrag.messageSeq + 1;
|
|
822 |
|
|
823 |
// Finished message does not fragment.
|
|
824 |
byte[] recordFrag = new byte[finFrag.messageLength + 4];
|
|
825 |
Plaintext plaintext = new Plaintext(finFrag.contentType,
|
|
826 |
finFrag.majorVersion, finFrag.minorVersion,
|
|
827 |
finFrag.recordEpoch, finFrag.recordSeq,
|
|
828 |
ByteBuffer.wrap(recordFrag));
|
|
829 |
|
|
830 |
// fill the handshake fragment of the record
|
|
831 |
recordFrag[0] = finFrag.handshakeType;
|
|
832 |
recordFrag[1] =
|
|
833 |
(byte)((finFrag.messageLength >>> 16) & 0xFF);
|
|
834 |
recordFrag[2] =
|
|
835 |
(byte)((finFrag.messageLength >>> 8) & 0xFF);
|
|
836 |
recordFrag[3] = (byte)(finFrag.messageLength & 0xFF);
|
|
837 |
|
|
838 |
System.arraycopy(finFrag.fragment, 0,
|
|
839 |
recordFrag, 4, finFrag.fragmentLength);
|
|
840 |
|
|
841 |
// handshake hashing
|
|
842 |
handshakeHashing(finFrag, plaintext);
|
|
843 |
|
|
844 |
// input handshake finished
|
|
845 |
handshakeFinished = true;
|
|
846 |
|
|
847 |
return plaintext;
|
|
848 |
} else {
|
|
849 |
return acquirePlaintext();
|
|
850 |
}
|
|
851 |
} else {
|
|
852 |
return new Plaintext(rFrag.contentType,
|
|
853 |
rFrag.majorVersion, rFrag.minorVersion,
|
|
854 |
rFrag.recordEpoch, rFrag.recordSeq,
|
|
855 |
plaintextFragment);
|
|
856 |
}
|
|
857 |
}
|
|
858 |
|
|
859 |
private Plaintext acquireHandshakeMessage() {
|
|
860 |
|
|
861 |
RecordFragment rFrag = bufferedFragments.first();
|
|
862 |
if (rFrag.contentType == Record.ct_change_cipher_spec) {
|
|
863 |
this.nextRecordEpoch = rFrag.recordEpoch + 1;
|
|
864 |
this.nextRecordSeq = 0;
|
|
865 |
// no change on next handshake message sequence number
|
|
866 |
|
|
867 |
bufferedFragments.remove(rFrag); // popup the fragment
|
|
868 |
|
|
869 |
// Reload if this message has been reserved for handshake hash.
|
|
870 |
handshakeHash.reload();
|
|
871 |
|
|
872 |
return new Plaintext(rFrag.contentType,
|
|
873 |
rFrag.majorVersion, rFrag.minorVersion,
|
|
874 |
rFrag.recordEpoch, rFrag.recordSeq,
|
|
875 |
ByteBuffer.wrap(rFrag.fragment));
|
|
876 |
} else { // rFrag.contentType == Record.ct_handshake
|
|
877 |
HandshakeFragment hsFrag = (HandshakeFragment)rFrag;
|
|
878 |
if ((hsFrag.messageLength == hsFrag.fragmentLength) &&
|
|
879 |
(hsFrag.fragmentOffset == 0)) { // no fragmentation
|
|
880 |
|
|
881 |
bufferedFragments.remove(rFrag); // popup the fragment
|
|
882 |
|
|
883 |
// this.nextRecordEpoch = hsFrag.recordEpoch;
|
|
884 |
this.nextRecordSeq = hsFrag.recordSeq + 1;
|
|
885 |
this.nextMessageSeq = hsFrag.messageSeq + 1;
|
|
886 |
|
|
887 |
// Note: may try to avoid byte array copy in the future.
|
|
888 |
byte[] recordFrag = new byte[hsFrag.messageLength + 4];
|
|
889 |
Plaintext plaintext = new Plaintext(hsFrag.contentType,
|
|
890 |
hsFrag.majorVersion, hsFrag.minorVersion,
|
|
891 |
hsFrag.recordEpoch, hsFrag.recordSeq,
|
|
892 |
ByteBuffer.wrap(recordFrag));
|
|
893 |
|
|
894 |
// fill the handshake fragment of the record
|
|
895 |
recordFrag[0] = hsFrag.handshakeType;
|
|
896 |
recordFrag[1] =
|
|
897 |
(byte)((hsFrag.messageLength >>> 16) & 0xFF);
|
|
898 |
recordFrag[2] =
|
|
899 |
(byte)((hsFrag.messageLength >>> 8) & 0xFF);
|
|
900 |
recordFrag[3] = (byte)(hsFrag.messageLength & 0xFF);
|
|
901 |
|
|
902 |
System.arraycopy(hsFrag.fragment, 0,
|
|
903 |
recordFrag, 4, hsFrag.fragmentLength);
|
|
904 |
|
|
905 |
// handshake hashing
|
|
906 |
handshakeHashing(hsFrag, plaintext);
|
|
907 |
|
|
908 |
return plaintext;
|
|
909 |
} else { // fragmented handshake message
|
|
910 |
// the first record
|
|
911 |
//
|
|
912 |
// Note: may try to avoid byte array copy in the future.
|
|
913 |
byte[] recordFrag = new byte[hsFrag.messageLength + 4];
|
|
914 |
Plaintext plaintext = new Plaintext(hsFrag.contentType,
|
|
915 |
hsFrag.majorVersion, hsFrag.minorVersion,
|
|
916 |
hsFrag.recordEpoch, hsFrag.recordSeq,
|
|
917 |
ByteBuffer.wrap(recordFrag));
|
|
918 |
|
|
919 |
// fill the handshake fragment of the record
|
|
920 |
recordFrag[0] = hsFrag.handshakeType;
|
|
921 |
recordFrag[1] =
|
|
922 |
(byte)((hsFrag.messageLength >>> 16) & 0xFF);
|
|
923 |
recordFrag[2] =
|
|
924 |
(byte)((hsFrag.messageLength >>> 8) & 0xFF);
|
|
925 |
recordFrag[3] = (byte)(hsFrag.messageLength & 0xFF);
|
|
926 |
|
|
927 |
int msgSeq = hsFrag.messageSeq;
|
|
928 |
long maxRecodeSN = hsFrag.recordSeq;
|
|
929 |
HandshakeFragment hmFrag = hsFrag;
|
|
930 |
do {
|
|
931 |
System.arraycopy(hmFrag.fragment, 0,
|
|
932 |
recordFrag, hmFrag.fragmentOffset + 4,
|
|
933 |
hmFrag.fragmentLength);
|
|
934 |
// popup the fragment
|
|
935 |
bufferedFragments.remove(rFrag);
|
|
936 |
|
|
937 |
if (maxRecodeSN < hmFrag.recordSeq) {
|
|
938 |
maxRecodeSN = hmFrag.recordSeq;
|
|
939 |
}
|
|
940 |
|
|
941 |
// Note: may buffer retransmitted fragments in order to
|
|
942 |
// speed up the reassembly in the future.
|
|
943 |
|
|
944 |
// read the next buffered record
|
|
945 |
if (!bufferedFragments.isEmpty()) {
|
|
946 |
rFrag = bufferedFragments.first();
|
|
947 |
if (rFrag.contentType != Record.ct_handshake) {
|
|
948 |
break;
|
|
949 |
} else {
|
|
950 |
hmFrag = (HandshakeFragment)rFrag;
|
|
951 |
}
|
|
952 |
}
|
|
953 |
} while (!bufferedFragments.isEmpty() &&
|
|
954 |
(msgSeq == hmFrag.messageSeq));
|
|
955 |
|
|
956 |
// handshake hashing
|
|
957 |
handshakeHashing(hsFrag, plaintext);
|
|
958 |
|
|
959 |
this.nextRecordSeq = maxRecodeSN + 1;
|
|
960 |
this.nextMessageSeq = msgSeq + 1;
|
|
961 |
|
|
962 |
return plaintext;
|
|
963 |
}
|
|
964 |
}
|
|
965 |
}
|
|
966 |
|
|
967 |
boolean flightIsReady() {
|
|
968 |
|
|
969 |
//
|
|
970 |
// the ChangeCipherSpec/Finished flight
|
|
971 |
//
|
|
972 |
if (expectCCSFlight) {
|
|
973 |
// Have the ChangeCipherSpec/Finished messages been received?
|
|
974 |
return hasFinisedMessage(bufferedFragments);
|
|
975 |
}
|
|
976 |
|
|
977 |
if (flightType == (byte)0xFF) {
|
|
978 |
return false;
|
|
979 |
}
|
|
980 |
|
|
981 |
if ((flightType == HandshakeMessage.ht_client_hello) ||
|
|
982 |
(flightType == HandshakeMessage.ht_hello_request) ||
|
|
983 |
(flightType == HandshakeMessage.ht_hello_verify_request)) {
|
|
984 |
|
|
985 |
// single handshake message flight
|
|
986 |
return hasCompleted(holesMap.get(flightType));
|
|
987 |
}
|
|
988 |
|
|
989 |
//
|
|
990 |
// the ServerHello flight
|
|
991 |
//
|
|
992 |
if (flightType == HandshakeMessage.ht_server_hello) {
|
|
993 |
// Firstly, check the first flight handshake message.
|
|
994 |
if (!hasCompleted(holesMap.get(flightType))) {
|
|
995 |
return false;
|
|
996 |
}
|
|
997 |
|
|
998 |
//
|
|
999 |
// an abbreviated handshake
|
|
1000 |
//
|
|
1001 |
if (isAbbreviatedHandshake) {
|
|
1002 |
// Ready to use the flight if received the
|
|
1003 |
// ChangeCipherSpec and Finished messages.
|
|
1004 |
return hasFinisedMessage(bufferedFragments);
|
|
1005 |
}
|
|
1006 |
|
|
1007 |
//
|
|
1008 |
// a full handshake
|
|
1009 |
//
|
|
1010 |
if (lastHandshakeFragment.handshakeType !=
|
|
1011 |
HandshakeMessage.ht_server_hello_done) {
|
|
1012 |
// Not yet got the final message of the flight.
|
|
1013 |
return false;
|
|
1014 |
}
|
|
1015 |
|
|
1016 |
// Have all handshake message been received?
|
|
1017 |
return hasCompleted(bufferedFragments,
|
|
1018 |
flightTopMessageSeq, lastHandshakeFragment.messageSeq);
|
|
1019 |
}
|
|
1020 |
|
|
1021 |
//
|
|
1022 |
// the ClientKeyExchange flight
|
|
1023 |
//
|
|
1024 |
// Note: need to consider more messages in this flight if
|
|
1025 |
// ht_supplemental_data and ht_certificate_url are
|
|
1026 |
// suppported in the future.
|
|
1027 |
//
|
|
1028 |
if ((flightType == HandshakeMessage.ht_certificate) ||
|
|
1029 |
(flightType == HandshakeMessage.ht_client_key_exchange)) {
|
|
1030 |
|
|
1031 |
// Firstly, check the first flight handshake message.
|
|
1032 |
if (!hasCompleted(holesMap.get(flightType))) {
|
|
1033 |
return false;
|
|
1034 |
}
|
|
1035 |
|
|
1036 |
if (!hasFinisedMessage(bufferedFragments)) {
|
|
1037 |
// not yet got the ChangeCipherSpec/Finished messages
|
|
1038 |
return false;
|
|
1039 |
}
|
|
1040 |
|
|
1041 |
if (flightType == HandshakeMessage.ht_client_key_exchange) {
|
|
1042 |
// single handshake message flight
|
|
1043 |
return true;
|
|
1044 |
}
|
|
1045 |
|
|
1046 |
//
|
|
1047 |
// flightType == HandshakeMessage.ht_certificate
|
|
1048 |
//
|
|
1049 |
// We don't support certificates containing fixed
|
|
1050 |
// Diffie-Hellman parameters. Therefore, CertificateVerify
|
|
1051 |
// message is required if client Certificate message presents.
|
|
1052 |
//
|
|
1053 |
if (lastHandshakeFragment.handshakeType !=
|
|
1054 |
HandshakeMessage.ht_certificate_verify) {
|
|
1055 |
// Not yet got the final message of the flight.
|
|
1056 |
return false;
|
|
1057 |
}
|
|
1058 |
|
|
1059 |
// Have all handshake message been received?
|
|
1060 |
return hasCompleted(bufferedFragments,
|
|
1061 |
flightTopMessageSeq, lastHandshakeFragment.messageSeq);
|
|
1062 |
}
|
|
1063 |
|
|
1064 |
//
|
|
1065 |
// Otherwise, need to receive more handshake messages.
|
|
1066 |
//
|
|
1067 |
return false;
|
|
1068 |
}
|
|
1069 |
|
|
1070 |
private boolean isSessionResuming(
|
|
1071 |
byte[] fragment, byte[] prevSid) throws SSLException {
|
|
1072 |
|
|
1073 |
// As the first fragment of ServerHello should be big enough
|
|
1074 |
// to hold the session_id field, need not to worry about the
|
|
1075 |
// fragmentation here.
|
|
1076 |
if ((fragment == null) || (fragment.length < 38)) {
|
|
1077 |
// 38: the minimal ServerHello body length
|
|
1078 |
throw new SSLException(
|
|
1079 |
"Invalid ServerHello message: no sufficient data");
|
|
1080 |
}
|
|
1081 |
|
|
1082 |
int sidLen = fragment[34]; // 34: the length field
|
|
1083 |
if (sidLen > 32) { // opaque SessionID<0..32>
|
|
1084 |
throw new SSLException(
|
|
1085 |
"Invalid ServerHello message: invalid session id");
|
|
1086 |
}
|
|
1087 |
|
|
1088 |
if (fragment.length < 38 + sidLen) {
|
|
1089 |
throw new SSLException(
|
|
1090 |
"Invalid ServerHello message: no sufficient data");
|
|
1091 |
}
|
|
1092 |
|
|
1093 |
if (sidLen != 0 && (prevSid.length == sidLen)) {
|
|
1094 |
// may be a session-resuming handshake
|
|
1095 |
for (int i = 0; i < sidLen; i++) {
|
|
1096 |
if (prevSid[i] != fragment[35 + i]) {
|
|
1097 |
// 35: the session identifier
|
|
1098 |
return false;
|
|
1099 |
}
|
|
1100 |
}
|
|
1101 |
|
|
1102 |
return true;
|
|
1103 |
}
|
|
1104 |
|
|
1105 |
return false;
|
|
1106 |
}
|
|
1107 |
|
|
1108 |
private byte[] getSessionID(byte[] fragment) {
|
|
1109 |
// The validity has been checked in the call to isSessionResuming().
|
|
1110 |
int sidLen = fragment[34]; // 34: the sessionID length field
|
|
1111 |
|
|
1112 |
byte[] temporary = new byte[sidLen];
|
|
1113 |
System.arraycopy(fragment, 35, temporary, 0, sidLen);
|
|
1114 |
|
|
1115 |
return temporary;
|
|
1116 |
}
|
|
1117 |
|
|
1118 |
// Looking for the ChangeCipherSpec and Finished messages.
|
|
1119 |
//
|
|
1120 |
// As the cached Finished message should be a ciphertext, we don't
|
|
1121 |
// exactly know a ciphertext is a Finished message or not. According
|
|
1122 |
// to the spec of TLS/DTLS handshaking, a Finished message is always
|
|
1123 |
// sent immediately after a ChangeCipherSpec message. The first
|
|
1124 |
// ciphertext handshake message should be the expected Finished message.
|
|
1125 |
private boolean hasFinisedMessage(
|
|
1126 |
Set<RecordFragment> fragments) {
|
|
1127 |
|
|
1128 |
boolean hasCCS = false;
|
|
1129 |
boolean hasFin = false;
|
|
1130 |
for (RecordFragment fragment : fragments) {
|
|
1131 |
if (fragment.contentType == Record.ct_change_cipher_spec) {
|
|
1132 |
if (hasFin) {
|
|
1133 |
return true;
|
|
1134 |
}
|
|
1135 |
hasCCS = true;
|
|
1136 |
} else if (fragment.contentType == Record.ct_handshake) {
|
|
1137 |
// Finished is the first expected message of a new epoch.
|
|
1138 |
if (fragment.isCiphertext) {
|
|
1139 |
if (hasCCS) {
|
|
1140 |
return true;
|
|
1141 |
}
|
|
1142 |
hasFin = true;
|
|
1143 |
}
|
|
1144 |
}
|
|
1145 |
}
|
|
1146 |
|
|
1147 |
return hasFin && hasCCS;
|
|
1148 |
}
|
|
1149 |
|
|
1150 |
private boolean hasCompleted(List<HoleDescriptor> holes) {
|
|
1151 |
if (holes == null) {
|
|
1152 |
// not yet received this kind of handshake message
|
|
1153 |
return false;
|
|
1154 |
}
|
|
1155 |
|
|
1156 |
return holes.isEmpty(); // no fragment hole for complete message
|
|
1157 |
}
|
|
1158 |
|
|
1159 |
private boolean hasCompleted(
|
|
1160 |
Set<RecordFragment> fragments,
|
|
1161 |
int presentMsgSeq, int endMsgSeq) {
|
|
1162 |
|
|
1163 |
// The caller should have checked the completion of the first
|
|
1164 |
// present handshake message. Need not to check it again.
|
|
1165 |
for (RecordFragment rFrag : fragments) {
|
|
1166 |
if ((rFrag.contentType != Record.ct_handshake) ||
|
|
1167 |
rFrag.isCiphertext) {
|
|
1168 |
break;
|
|
1169 |
}
|
|
1170 |
|
|
1171 |
HandshakeFragment hsFrag = (HandshakeFragment)rFrag;
|
|
1172 |
if (hsFrag.messageSeq == presentMsgSeq) {
|
|
1173 |
continue;
|
|
1174 |
} else if (hsFrag.messageSeq == (presentMsgSeq + 1)) {
|
|
1175 |
// check the completion of the handshake message
|
|
1176 |
if (!hasCompleted(holesMap.get(hsFrag.handshakeType))) {
|
|
1177 |
return false;
|
|
1178 |
}
|
|
1179 |
|
|
1180 |
presentMsgSeq = hsFrag.messageSeq;
|
|
1181 |
} else {
|
|
1182 |
// not yet got handshake message next to presentMsgSeq
|
|
1183 |
break;
|
|
1184 |
}
|
|
1185 |
}
|
|
1186 |
|
|
1187 |
return (presentMsgSeq >= endMsgSeq);
|
|
1188 |
// false: if not yet got all messages of the flight.
|
|
1189 |
}
|
|
1190 |
|
|
1191 |
private void handshakeHashing(
|
|
1192 |
HandshakeFragment hsFrag, Plaintext plaintext) {
|
|
1193 |
|
|
1194 |
byte hsType = hsFrag.handshakeType;
|
|
1195 |
if ((hsType == HandshakeMessage.ht_hello_request) ||
|
|
1196 |
(hsType == HandshakeMessage.ht_hello_verify_request)) {
|
|
1197 |
|
|
1198 |
// omitted from handshake hash computation
|
|
1199 |
return;
|
|
1200 |
}
|
|
1201 |
|
|
1202 |
if ((hsFrag.messageSeq == 0) &&
|
|
1203 |
(hsType == HandshakeMessage.ht_client_hello)) {
|
|
1204 |
|
|
1205 |
// omit initial ClientHello message
|
|
1206 |
//
|
|
1207 |
// 4: handshake header
|
|
1208 |
// 2: ClientHello.client_version
|
|
1209 |
// 32: ClientHello.random
|
|
1210 |
int sidLen = plaintext.fragment.get(38);
|
|
1211 |
|
|
1212 |
if (sidLen == 0) { // empty session_id, initial handshake
|
|
1213 |
return;
|
|
1214 |
}
|
|
1215 |
}
|
|
1216 |
|
|
1217 |
// calculate the DTLS header
|
|
1218 |
byte[] temporary = new byte[12]; // 12: handshake header size
|
|
1219 |
|
|
1220 |
// Handshake.msg_type
|
|
1221 |
temporary[0] = hsFrag.handshakeType;
|
|
1222 |
|
|
1223 |
// Handshake.length
|
|
1224 |
temporary[1] = (byte)((hsFrag.messageLength >> 16) & 0xFF);
|
|
1225 |
temporary[2] = (byte)((hsFrag.messageLength >> 8) & 0xFF);
|
|
1226 |
temporary[3] = (byte)(hsFrag.messageLength & 0xFF);
|
|
1227 |
|
|
1228 |
// Handshake.message_seq
|
|
1229 |
temporary[4] = (byte)((hsFrag.messageSeq >> 8) & 0xFF);
|
|
1230 |
temporary[5] = (byte)(hsFrag.messageSeq & 0xFF);
|
|
1231 |
|
|
1232 |
// Handshake.fragment_offset
|
|
1233 |
temporary[6] = 0;
|
|
1234 |
temporary[7] = 0;
|
|
1235 |
temporary[8] = 0;
|
|
1236 |
|
|
1237 |
// Handshake.fragment_length
|
|
1238 |
temporary[9] = temporary[1];
|
|
1239 |
temporary[10] = temporary[2];
|
|
1240 |
temporary[11] = temporary[3];
|
|
1241 |
|
|
1242 |
plaintext.fragment.position(4); // ignore the TLS header
|
|
1243 |
if ((hsType != HandshakeMessage.ht_finished) &&
|
|
1244 |
(hsType != HandshakeMessage.ht_certificate_verify)) {
|
|
1245 |
|
|
1246 |
if (handshakeHash == null) {
|
|
1247 |
// used for cache only
|
|
1248 |
handshakeHash = new HandshakeHash(false);
|
|
1249 |
}
|
|
1250 |
handshakeHash.update(temporary, 0, 12);
|
|
1251 |
handshakeHash.update(plaintext.fragment);
|
|
1252 |
} else {
|
|
1253 |
// Reserve until this handshake message has been processed.
|
|
1254 |
if (handshakeHash == null) {
|
|
1255 |
// used for cache only
|
|
1256 |
handshakeHash = new HandshakeHash(false);
|
|
1257 |
}
|
|
1258 |
handshakeHash.reserve(temporary, 0, 12);
|
|
1259 |
handshakeHash.reserve(plaintext.fragment);
|
|
1260 |
}
|
|
1261 |
plaintext.fragment.position(0); // restore the position
|
|
1262 |
}
|
|
1263 |
}
|
|
1264 |
}
|
|
1265 |
|