| /* | |
| * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| */ | |
| /* | |
| * @test | |
| * @bug 8044860 | |
| * @summary Vectors and fixed length fields should be verified | |
| * for allowed sizes. | |
| * @library /test/lib /javax/net/ssl/templates | |
| * @modules java.base/sun.security.ssl | |
| * @run main/othervm LengthCheckTest | |
| * @key randomness | |
| */ | |
| /** | |
| * A SSLEngine usage example which simplifies the presentation | |
| * by removing the I/O and multi-threading concerns. | |
| * | |
| * The test creates two SSLEngines, simulating a client and server. | |
| * The "transport" layer consists two byte buffers: think of them | |
| * as directly connected pipes. | |
| * | |
| * Note, this is a *very* simple example: real code will be much more | |
| * involved. For example, different threading and I/O models could be | |
| * used, transport mechanisms could close unexpectedly, and so on. | |
| * | |
| * When this application runs, notice that several messages | |
| * (wrap/unwrap) pass before any application data is consumed or | |
| * produced. (For more information, please see the SSL/TLS | |
| * specifications.) There may several steps for a successful handshake, | |
| * so it's typical to see the following series of operations: | |
| * | |
| * client server message | |
| * ====== ====== ======= | |
| * wrap() ... ClientHello | |
| * ... unwrap() ClientHello | |
| * ... wrap() ServerHello/Certificate | |
| * unwrap() ... ServerHello/Certificate | |
| * wrap() ... ClientKeyExchange | |
| * wrap() ... ChangeCipherSpec | |
| * wrap() ... Finished | |
| * ... unwrap() ClientKeyExchange | |
| * ... unwrap() ChangeCipherSpec | |
| * ... unwrap() Finished | |
| * ... wrap() ChangeCipherSpec | |
| * ... wrap() Finished | |
| * unwrap() ... ChangeCipherSpec | |
| * unwrap() ... Finished | |
| */ | |
| import javax.net.ssl.*; | |
| import javax.net.ssl.SSLEngineResult.*; | |
| import java.security.*; | |
| import java.nio.*; | |
| import java.util.List; | |
| import java.util.ArrayList; | |
| import java.util.Iterator; | |
| import jdk.test.lib.security.SecurityUtils; | |
| public class LengthCheckTest extends SSLEngineTemplate { | |
| /* | |
| * Enables logging of the SSLEngine operations. | |
| */ | |
| private static final boolean logging = true; | |
| /* | |
| * Enables the JSSE system debugging system property: | |
| * | |
| * -Djavax.net.debug=all | |
| * | |
| * This gives a lot of low-level information about operations underway, | |
| * including specific handshake messages, and might be best examined | |
| * after gaining some familiarity with this application. | |
| */ | |
| private static final boolean debug = false; | |
| private static final boolean dumpBufs = true; | |
| private HandshakeTest handshakeTest; | |
| // Define a few basic TLS record and message types we might need | |
| private static final int TLS_RECTYPE_CCS = 0x14; | |
| private static final int TLS_RECTYPE_ALERT = 0x15; | |
| private static final int TLS_RECTYPE_HANDSHAKE = 0x16; | |
| private static final int TLS_RECTYPE_APPDATA = 0x17; | |
| private static final int TLS_HS_HELLO_REQUEST = 0x00; | |
| private static final int TLS_HS_CLIENT_HELLO = 0x01; | |
| private static final int TLS_HS_SERVER_HELLO = 0x02; | |
| private static final int TLS_HS_CERTIFICATE = 0x0B; | |
| private static final int TLS_HS_SERVER_KEY_EXCHG = 0x0C; | |
| private static final int TLS_HS_CERT_REQUEST = 0x0D; | |
| private static final int TLS_HS_SERVER_HELLO_DONE = 0x0E; | |
| private static final int TLS_HS_CERT_VERIFY = 0x0F; | |
| private static final int TLS_HS_CLIENT_KEY_EXCHG = 0x10; | |
| private static final int TLS_HS_FINISHED = 0x14; | |
| // We're not going to define all the alert types in TLS, just | |
| // the ones we think we'll need to reference by name. | |
| private static final int TLS_ALERT_LVL_WARNING = 0x01; | |
| private static final int TLS_ALERT_LVL_FATAL = 0x02; | |
| private static final int TLS_ALERT_UNEXPECTED_MSG = 0x0A; | |
| private static final int TLS_ALERT_HANDSHAKE_FAILURE = 0x28; | |
| private static final int TLS_ALERT_INTERNAL_ERROR = 0x50; | |
| private static final int TLS_ALERT_ILLEGAL_PARAMETER = 0x2F; | |
| public interface HandshakeTest { | |
| void execTest() throws Exception; | |
| } | |
| public final HandshakeTest servSendLongID = new HandshakeTest() { | |
| @Override | |
| public void execTest() throws Exception { | |
| boolean gotException = false; | |
| SSLEngineResult clientResult; // results from client's last op | |
| SSLEngineResult serverResult; // results from server's last op | |
| log("\n==== Test: Client receives 64-byte session ID ===="); | |
| // Send Client Hello | |
| clientResult = clientEngine.wrap(clientOut, cTOs); | |
| log("client wrap: ", clientResult); | |
| runDelegatedTasks(clientEngine); | |
| cTOs.flip(); | |
| dumpByteBuffer("CLIENT-TO-SERVER", cTOs); | |
| // Server consumes Client Hello | |
| serverResult = serverEngine.unwrap(cTOs, serverIn); | |
| log("server unwrap: ", serverResult); | |
| runDelegatedTasks(serverEngine); | |
| cTOs.compact(); | |
| // Server generates ServerHello/Cert/Done record | |
| serverResult = serverEngine.wrap(serverOut, sTOc); | |
| log("server wrap: ", serverResult); | |
| runDelegatedTasks(serverEngine); | |
| sTOc.flip(); | |
| // Intercept the ServerHello messages and instead send | |
| // one that has a 64-byte session ID. | |
| if (isTlsMessage(sTOc, TLS_RECTYPE_HANDSHAKE, | |
| TLS_HS_SERVER_HELLO)) { | |
| ArrayList<ByteBuffer> recList = splitRecord(sTOc); | |
| // Use the original ServerHello as a template to craft one | |
| // with a longer-than-allowed session ID. | |
| ByteBuffer servHelloBuf = | |
| createEvilServerHello(recList.get(0), 64); | |
| recList.set(0, servHelloBuf); | |
| // Now send each ByteBuffer (each being a complete | |
| // TLS record) into the client-side unwrap. | |
| // for (ByteBuffer bBuf : recList) { | |
| Iterator<ByteBuffer> iter = recList.iterator(); | |
| while (!gotException && (iter.hasNext())) { | |
| ByteBuffer bBuf = iter.next(); | |
| dumpByteBuffer("SERVER-TO-CLIENT", bBuf); | |
| try { | |
| clientResult = clientEngine.unwrap(bBuf, clientIn); | |
| } catch (SSLProtocolException e) { | |
| log("Received expected SSLProtocolException: " + e); | |
| gotException = true; | |
| } | |
| log("client unwrap: ", clientResult); | |
| runDelegatedTasks(clientEngine); | |
| } | |
| } else { | |
| dumpByteBuffer("SERVER-TO-CLIENT", sTOc); | |
| log("client unwrap: ", clientResult); | |
| runDelegatedTasks(clientEngine); | |
| } | |
| sTOc.compact(); | |
| // The Client should now send a TLS Alert | |
| clientResult = clientEngine.wrap(clientOut, cTOs); | |
| log("client wrap: ", clientResult); | |
| runDelegatedTasks(clientEngine); | |
| cTOs.flip(); | |
| dumpByteBuffer("CLIENT-TO-SERVER", cTOs); | |
| // At this point we can verify that both an exception | |
| // was thrown and the proper action (a TLS alert) was | |
| // sent back to the server. | |
| if (gotException == false || | |
| !isTlsMessage(cTOs, TLS_RECTYPE_ALERT, TLS_ALERT_LVL_FATAL, | |
| TLS_ALERT_ILLEGAL_PARAMETER)) { | |
| throw new SSLException( | |
| "Client failed to throw Alert:fatal:internal_error"); | |
| } | |
| } | |
| }; | |
| public final HandshakeTest clientSendLongID = new HandshakeTest() { | |
| @Override | |
| public void execTest() throws Exception { | |
| boolean gotException = false; | |
| SSLEngineResult clientResult; // results from client's last op | |
| SSLEngineResult serverResult; // results from server's last op | |
| log("\n==== Test: Server receives 64-byte session ID ===="); | |
| // Send Client Hello | |
| ByteBuffer evilClientHello = createEvilClientHello(64); | |
| dumpByteBuffer("CLIENT-TO-SERVER", evilClientHello); | |
| // Server consumes Client Hello | |
| serverResult = serverEngine.unwrap(evilClientHello, serverIn); | |
| log("server unwrap: ", serverResult); | |
| runDelegatedTasks(serverEngine); | |
| evilClientHello.compact(); | |
| // Under normal circumstances this should be a ServerHello | |
| // But should throw an exception instead due to the invalid | |
| // session ID. | |
| try { | |
| serverResult = serverEngine.wrap(serverOut, sTOc); | |
| log("server wrap: ", serverResult); | |
| runDelegatedTasks(serverEngine); | |
| } catch (SSLProtocolException ssle) { | |
| log("Received expected SSLProtocolException: " + ssle); | |
| gotException = true; | |
| } | |
| // We expect to see the server generate an alert here | |
| serverResult = serverEngine.wrap(serverOut, sTOc); | |
| log("server wrap: ", serverResult); | |
| runDelegatedTasks(serverEngine); | |
| sTOc.flip(); | |
| dumpByteBuffer("SERVER-TO-CLIENT", sTOc); | |
| // At this point we can verify that both an exception | |
| // was thrown and the proper action (a TLS alert) was | |
| // sent back to the client. | |
| if (gotException == false || | |
| !isTlsMessage(sTOc, TLS_RECTYPE_ALERT, TLS_ALERT_LVL_FATAL, | |
| TLS_ALERT_ILLEGAL_PARAMETER)) { | |
| throw new SSLException( | |
| "Server failed to throw Alert:fatal:internal_error"); | |
| } | |
| } | |
| }; | |
| /* | |
| * Main entry point for this test. | |
| */ | |
| public static void main(String args[]) throws Exception { | |
| // Re-enable TLSv1 and TLS_RSA_* since test depends on it. | |
| SecurityUtils.removeFromDisabledTlsAlgs("TLSv1", "TLS_RSA_*"); | |
| List<LengthCheckTest> ccsTests = new ArrayList<>(); | |
| if (debug) { | |
| System.setProperty("javax.net.debug", "ssl"); | |
| } | |
| ccsTests.add(new LengthCheckTest("ServSendLongID")); | |
| ccsTests.add(new LengthCheckTest("ClientSendLongID")); | |
| for (LengthCheckTest test : ccsTests) { | |
| test.runTest(); | |
| } | |
| System.out.println("Test Passed."); | |
| } | |
| /* | |
| * Create an initialized SSLContext to use for these tests. | |
| */ | |
| public LengthCheckTest(String testName) throws Exception { | |
| super(); | |
| switch (testName) { | |
| case "ServSendLongID": | |
| handshakeTest = servSendLongID; | |
| break; | |
| case "ClientSendLongID": | |
| handshakeTest = clientSendLongID; | |
| break; | |
| default: | |
| throw new IllegalArgumentException("Unknown test name: " + | |
| testName); | |
| } | |
| } | |
| /* | |
| * Run the test. | |
| * | |
| * Sit in a tight loop, both engines calling wrap/unwrap regardless | |
| * of whether data is available or not. We do this until both engines | |
| * report back they are closed. | |
| * | |
| * The main loop handles all of the I/O phases of the SSLEngine's | |
| * lifetime: | |
| * | |
| * initial handshaking | |
| * application data transfer | |
| * engine closing | |
| * | |
| * One could easily separate these phases into separate | |
| * sections of code. | |
| */ | |
| private void runTest() throws Exception { | |
| configureSSLEngine(); | |
| // createBuffers(); | |
| handshakeTest.execTest(); | |
| } | |
| /* | |
| * Using the SSLContext created during object creation, | |
| * create/configure the SSLEngines we'll use for this test. | |
| */ | |
| private void configureSSLEngine() throws Exception { | |
| /* | |
| * Configure the serverEngine to act as a server in the SSL/TLS | |
| * handshake. Also, require SSL client authentication. | |
| */ | |
| serverEngine.setUseClientMode(false); | |
| serverEngine.setNeedClientAuth(false); | |
| /* | |
| * Similar to above, but using client mode instead. | |
| */ | |
| clientEngine.setUseClientMode(true); | |
| // In order to make a test that will be backwards compatible | |
| // going back to JDK 5, force the handshake to be TLS 1.0 and | |
| // use one of the older cipher suites. | |
| clientEngine.setEnabledProtocols(new String[]{"TLSv1"}); | |
| clientEngine.setEnabledCipherSuites( | |
| new String[]{"TLS_RSA_WITH_AES_128_CBC_SHA"}); | |
| } | |
| /* | |
| * Logging code | |
| */ | |
| private static boolean resultOnce = true; | |
| private static void log(String str, SSLEngineResult result) { | |
| if (!logging) { | |
| return; | |
| } | |
| if (resultOnce) { | |
| resultOnce = false; | |
| System.out.println("The format of the SSLEngineResult is: \n" + | |
| "\t\"getStatus() / getHandshakeStatus()\" +\n" + | |
| "\t\"bytesConsumed() / bytesProduced()\"\n"); | |
| } | |
| HandshakeStatus hsStatus = result.getHandshakeStatus(); | |
| log(str + | |
| result.getStatus() + "/" + hsStatus + ", " + | |
| result.bytesConsumed() + "/" + result.bytesProduced() + | |
| " bytes"); | |
| if (hsStatus == HandshakeStatus.FINISHED) { | |
| log("\t...ready for application data"); | |
| } | |
| } | |
| private static void log(String str) { | |
| if (logging) { | |
| System.out.println(str); | |
| } | |
| } | |
| /** | |
| * Split a record consisting of multiple TLS handshake messages | |
| * into individual TLS records, each one in a ByteBuffer of its own. | |
| * | |
| * @param tlsRecord A ByteBuffer containing the tls record data. | |
| * The position of the buffer should be at the first byte | |
| * in the TLS record data. | |
| * | |
| * @return An ArrayList consisting of one or more ByteBuffers. Each | |
| * ByteBuffer will contain a single TLS record with one message. | |
| * That message will be taken from the input record. The order | |
| * of the messages in the ArrayList will be the same as they | |
| * were in the input record. | |
| */ | |
| private ArrayList<ByteBuffer> splitRecord(ByteBuffer tlsRecord) { | |
| SSLSession session = clientEngine.getSession(); | |
| int netBufferMax = session.getPacketBufferSize(); | |
| ArrayList<ByteBuffer> recordList = new ArrayList<>(); | |
| if (tlsRecord.hasRemaining()) { | |
| int type = Byte.toUnsignedInt(tlsRecord.get()); | |
| byte ver_major = tlsRecord.get(); | |
| byte ver_minor = tlsRecord.get(); | |
| int recLen = Short.toUnsignedInt(tlsRecord.getShort()); | |
| byte[] newMsgData = null; | |
| while (tlsRecord.hasRemaining()) { | |
| ByteBuffer newRecord = ByteBuffer.allocateDirect(netBufferMax); | |
| switch (type) { | |
| case TLS_RECTYPE_CCS: | |
| case TLS_RECTYPE_ALERT: | |
| case TLS_RECTYPE_APPDATA: | |
| // None of our tests have multiple non-handshake | |
| // messages coalesced into a single record. | |
| break; | |
| case TLS_RECTYPE_HANDSHAKE: | |
| newMsgData = getHandshakeMessage(tlsRecord); | |
| break; | |
| } | |
| // Put a new TLS record on the destination ByteBuffer | |
| newRecord.put((byte)type); | |
| newRecord.put(ver_major); | |
| newRecord.put(ver_minor); | |
| newRecord.putShort((short)newMsgData.length); | |
| // Now add the message content itself and attach to the | |
| // returned ArrayList | |
| newRecord.put(newMsgData); | |
| newRecord.flip(); | |
| recordList.add(newRecord); | |
| } | |
| } | |
| return recordList; | |
| } | |
| private static ByteBuffer createEvilClientHello(int sessIdLen) { | |
| ByteBuffer newRecord = ByteBuffer.allocateDirect(4096); | |
| // Lengths will initially be place holders until we determine the | |
| // finished length of the ByteBuffer. Then we'll go back and scribble | |
| // in the correct lengths. | |
| newRecord.put((byte)TLS_RECTYPE_HANDSHAKE); // Record type | |
| newRecord.putShort((short)0x0301); // Protocol (TLS 1.0) | |
| newRecord.putShort((short)0); // Length place holder | |
| newRecord.putInt(TLS_HS_CLIENT_HELLO << 24); // HS type and length | |
| newRecord.putShort((short)0x0301); | |
| newRecord.putInt((int)(System.currentTimeMillis() / 1000)); | |
| SecureRandom sr = new SecureRandom(); | |
| byte[] randBuf = new byte[28]; | |
| sr.nextBytes(randBuf); | |
| newRecord.put(randBuf); // Client Random | |
| newRecord.put((byte)sessIdLen); // Session ID length | |
| if (sessIdLen > 0) { | |
| byte[] sessId = new byte[sessIdLen]; | |
| sr.nextBytes(sessId); | |
| newRecord.put(sessId); // Session ID | |
| } | |
| newRecord.putShort((short)2); // 2 bytes of ciphers | |
| newRecord.putShort((short)0x002F); // TLS_RSA_AES_CBC_SHA | |
| newRecord.putShort((short)0x0100); // only null compression | |
| newRecord.putShort((short)5); // 5 bytes of extensions | |
| newRecord.putShort((short)0xFF01); // Renegotiation info | |
| newRecord.putShort((short)1); | |
| newRecord.put((byte)0); // No reneg info exts | |
| // Go back and fill in the correct length values for the record | |
| // and handshake message headers. | |
| int recordLength = newRecord.position(); | |
| newRecord.putShort(3, (short)(recordLength - 5)); | |
| int newTypeAndLen = (newRecord.getInt(5) & 0xFF000000) | | |
| ((recordLength - 9) & 0x00FFFFFF); | |
| newRecord.putInt(5, newTypeAndLen); | |
| newRecord.flip(); | |
| return newRecord; | |
| } | |
| private static ByteBuffer createEvilServerHello(ByteBuffer origHello, | |
| int newSessIdLen) { | |
| if (newSessIdLen < 0 || newSessIdLen > Byte.MAX_VALUE) { | |
| throw new RuntimeException("Length must be 0 <= X <= 127"); | |
| } | |
| ByteBuffer newRecord = ByteBuffer.allocateDirect(4096); | |
| // Copy the bytes from the old hello to the new up to the session ID | |
| // field. We will go back later and fill in a new length field in | |
| // the record header. This includes the record header (5 bytes), the | |
| // Handshake message header (4 bytes), protocol version (2 bytes), | |
| // and the random (32 bytes). | |
| ByteBuffer scratchBuffer = origHello.slice(); | |
| scratchBuffer.limit(43); | |
| newRecord.put(scratchBuffer); | |
| // Advance the position in the originial hello buffer past the | |
| // session ID. | |
| origHello.position(43); | |
| int origIDLen = Byte.toUnsignedInt(origHello.get()); | |
| if (origIDLen > 0) { | |
| // Skip over the session ID | |
| origHello.position(origHello.position() + origIDLen); | |
| } | |
| // Now add our own sessionID to the new record | |
| SecureRandom sr = new SecureRandom(); | |
| byte[] sessId = new byte[newSessIdLen]; | |
| sr.nextBytes(sessId); | |
| newRecord.put((byte)newSessIdLen); | |
| newRecord.put(sessId); | |
| // Create another slice in the original buffer, based on the position | |
| // past the session ID. Copy the remaining bytes into the new | |
| // hello buffer. Then go back and fix up the length | |
| newRecord.put(origHello.slice()); | |
| // Go back and fill in the correct length values for the record | |
| // and handshake message headers. | |
| int recordLength = newRecord.position(); | |
| newRecord.putShort(3, (short)(recordLength - 5)); | |
| int newTypeAndLen = (newRecord.getInt(5) & 0xFF000000) | | |
| ((recordLength - 9) & 0x00FFFFFF); | |
| newRecord.putInt(5, newTypeAndLen); | |
| newRecord.flip(); | |
| return newRecord; | |
| } | |
| /** | |
| * Look at an incoming TLS record and see if it is the desired | |
| * record type, and where appropriate the correct subtype. | |
| * | |
| * @param srcRecord The input TLS record to be evaluated. This | |
| * method will only look at the leading message if multiple | |
| * TLS handshake messages are coalesced into a single record. | |
| * @param reqRecType The requested TLS record type | |
| * @param recParams Zero or more integer sub type fields. For CCS | |
| * and ApplicationData, no params are used. For handshake records, | |
| * one value corresponding to the HandshakeType is required. | |
| * For Alerts, two values corresponding to AlertLevel and | |
| * AlertDescription are necessary. | |
| * | |
| * @return true if the proper handshake message is the first one | |
| * in the input record, false otherwise. | |
| */ | |
| private boolean isTlsMessage(ByteBuffer srcRecord, int reqRecType, | |
| int... recParams) { | |
| boolean foundMsg = false; | |
| if (srcRecord.hasRemaining()) { | |
| srcRecord.mark(); | |
| // Grab the fields from the TLS Record | |
| int recordType = Byte.toUnsignedInt(srcRecord.get()); | |
| byte ver_major = srcRecord.get(); | |
| byte ver_minor = srcRecord.get(); | |
| int recLen = Short.toUnsignedInt(srcRecord.getShort()); | |
| if (recordType == reqRecType) { | |
| // For any zero-length recParams, making sure the requested | |
| // type is sufficient. | |
| if (recParams.length == 0) { | |
| foundMsg = true; | |
| } else { | |
| switch (recordType) { | |
| case TLS_RECTYPE_CCS: | |
| case TLS_RECTYPE_APPDATA: | |
| // We really shouldn't find ourselves here, but | |
| // if someone asked for these types and had more | |
| // recParams we can ignore them. | |
| foundMsg = true; | |
| break; | |
| case TLS_RECTYPE_ALERT: | |
| // Needs two params, AlertLevel and AlertDescription | |
| if (recParams.length != 2) { | |
| throw new RuntimeException( | |
| "Test for Alert requires level and desc."); | |
| } else { | |
| int level = Byte.toUnsignedInt(srcRecord.get()); | |
| int desc = Byte.toUnsignedInt(srcRecord.get()); | |
| if (level == recParams[0] && | |
| desc == recParams[1]) { | |
| foundMsg = true; | |
| } | |
| } | |
| break; | |
| case TLS_RECTYPE_HANDSHAKE: | |
| // Needs one parameter, HandshakeType | |
| if (recParams.length != 1) { | |
| throw new RuntimeException( | |
| "Test for Handshake requires only HS type"); | |
| } else { | |
| // Go into the first handhshake message in the | |
| // record and grab the handshake message header. | |
| // All we need to do is parse out the leading | |
| // byte. | |
| int msgHdr = srcRecord.getInt(); | |
| int msgType = (msgHdr >> 24) & 0x000000FF; | |
| if (msgType == recParams[0]) { | |
| foundMsg = true; | |
| } | |
| } | |
| break; | |
| } | |
| } | |
| } | |
| srcRecord.reset(); | |
| } | |
| return foundMsg; | |
| } | |
| private byte[] getHandshakeMessage(ByteBuffer srcRecord) { | |
| // At the start of this routine, the position should be lined up | |
| // at the first byte of a handshake message. Mark this location | |
| // so we can return to it after reading the type and length. | |
| srcRecord.mark(); | |
| int msgHdr = srcRecord.getInt(); | |
| int type = (msgHdr >> 24) & 0x000000FF; | |
| int length = msgHdr & 0x00FFFFFF; | |
| // Create a byte array that has enough space for the handshake | |
| // message header and body. | |
| byte[] data = new byte[length + 4]; | |
| srcRecord.reset(); | |
| srcRecord.get(data, 0, length + 4); | |
| return (data); | |
| } | |
| /** | |
| * Hex-dumps a ByteBuffer to stdout. | |
| */ | |
| private static void dumpByteBuffer(String header, ByteBuffer bBuf) { | |
| if (dumpBufs == false) { | |
| return; | |
| } | |
| int bufLen = bBuf.remaining(); | |
| if (bufLen > 0) { | |
| bBuf.mark(); | |
| // We expect the position of the buffer to be at the | |
| // beginning of a TLS record. Get the type, version and length. | |
| int type = Byte.toUnsignedInt(bBuf.get()); | |
| int ver_major = Byte.toUnsignedInt(bBuf.get()); | |
| int ver_minor = Byte.toUnsignedInt(bBuf.get()); | |
| int recLen = Short.toUnsignedInt(bBuf.getShort()); | |
| log("===== " + header + " (" + tlsRecType(type) + " / " + | |
| ver_major + "." + ver_minor + " / " + bufLen + " bytes) ====="); | |
| bBuf.reset(); | |
| for (int i = 0; i < bufLen; i++) { | |
| if (i != 0 && i % 16 == 0) { | |
| System.out.print("\n"); | |
| } | |
| System.out.format("%02X ", bBuf.get(i)); | |
| } | |
| log("\n==============================================="); | |
| bBuf.reset(); | |
| } | |
| } | |
| private static String tlsRecType(int type) { | |
| switch (type) { | |
| case 20: | |
| return "Change Cipher Spec"; | |
| case 21: | |
| return "Alert"; | |
| case 22: | |
| return "Handshake"; | |
| case 23: | |
| return "Application Data"; | |
| default: | |
| return ("Unknown (" + type + ")"); | |
| } | |
| } | |
| } |