| /* | |
| * Copyright (c) 2015, 2025, 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. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle in the LICENSE file that accompanied this code. | |
| * | |
| * 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. | |
| */ | |
| package sun.security.ssl; | |
| import java.io.IOException; | |
| import java.nio.ByteBuffer; | |
| import java.security.SecureRandom; | |
| import java.security.cert.X509Certificate; | |
| import java.text.MessageFormat; | |
| import java.util.*; | |
| import javax.net.ssl.SSLException; | |
| import javax.net.ssl.SSLHandshakeException; | |
| import javax.net.ssl.SSLPeerUnverifiedException; | |
| import javax.net.ssl.SSLProtocolException; | |
| import static sun.security.ssl.ClientAuthType.CLIENT_AUTH_REQUIRED; | |
| import sun.security.ssl.SSLHandshake.HandshakeMessage; | |
| import sun.security.ssl.SupportedVersionsExtension.CHSupportedVersionsSpec; | |
| /** | |
| * Pack of the ClientHello handshake message. | |
| */ | |
| final class ClientHello { | |
| static final SSLProducer kickstartProducer = | |
| new ClientHelloKickstartProducer(); | |
| static final SSLConsumer handshakeConsumer = | |
| new ClientHelloConsumer(); | |
| static final HandshakeProducer handshakeProducer = | |
| new ClientHelloProducer(); | |
| private static final HandshakeConsumer t12HandshakeConsumer = | |
| new T12ClientHelloConsumer(); | |
| private static final HandshakeConsumer t13HandshakeConsumer = | |
| new T13ClientHelloConsumer(); | |
| private static final HandshakeConsumer d12HandshakeConsumer = | |
| new D12ClientHelloConsumer(); | |
| private static final HandshakeConsumer d13HandshakeConsumer = | |
| new D13ClientHelloConsumer(); | |
| /** | |
| * The ClientHello handshake message. | |
| * | |
| * See RFC 5264/4346/2246/6347 for the specifications. | |
| */ | |
| static final class ClientHelloMessage extends HandshakeMessage { | |
| private final boolean isDTLS; | |
| final int clientVersion; | |
| final RandomCookie clientRandom; | |
| final SessionId sessionId; | |
| private byte[] cookie; // DTLS only | |
| final int[] cipherSuiteIds; | |
| final List<CipherSuite> cipherSuites; // known cipher suites only | |
| final byte[] compressionMethod; | |
| final SSLExtensions extensions; | |
| private static final byte[] NULL_COMPRESSION = new byte[] {0}; | |
| ClientHelloMessage(HandshakeContext handshakeContext, | |
| int clientVersion, SessionId sessionId, | |
| List<CipherSuite> cipherSuites, SecureRandom generator) { | |
| super(handshakeContext); | |
| this.isDTLS = handshakeContext.sslContext.isDTLS(); | |
| this.clientVersion = clientVersion; | |
| this.clientRandom = new RandomCookie(generator); | |
| this.sessionId = sessionId; | |
| if (isDTLS) { | |
| this.cookie = new byte[0]; | |
| } else { | |
| this.cookie = null; | |
| } | |
| this.cipherSuites = cipherSuites; | |
| this.cipherSuiteIds = getCipherSuiteIds(cipherSuites); | |
| this.extensions = new SSLExtensions(this); | |
| // Don't support compression. | |
| this.compressionMethod = NULL_COMPRESSION; | |
| } | |
| /* Read up to the binders in the PSK extension. After this method | |
| * returns, the ByteBuffer position will be at end of the message | |
| * fragment that should be hashed to produce the PSK binder values. | |
| * The client of this method can use this position to determine the | |
| * message fragment and produce the binder values. | |
| */ | |
| static void readPartial(TransportContext tc, | |
| ByteBuffer m) throws IOException { | |
| boolean isDTLS = tc.sslContext.isDTLS(); | |
| // version | |
| Record.getInt16(m); | |
| new RandomCookie(m); | |
| // session ID | |
| Record.getBytes8(m); | |
| // DTLS cookie | |
| if (isDTLS) { | |
| Record.getBytes8(m); | |
| } | |
| // cipher suite IDs | |
| Record.getBytes16(m); | |
| // compression method | |
| Record.getBytes8(m); | |
| // read extensions, if present | |
| if (m.remaining() >= 2) { | |
| int remaining = Record.getInt16(m); | |
| while (remaining > 0) { | |
| int id = Record.getInt16(m); | |
| int extLen = Record.getInt16(m); | |
| remaining -= extLen + 4; | |
| if (id == SSLExtension.CH_PRE_SHARED_KEY.id) { | |
| // ensure pre_shared_key is the last extension | |
| if (remaining > 0) { | |
| throw tc.fatal(Alert.ILLEGAL_PARAMETER, | |
| "pre_shared_key extension is not last"); | |
| } | |
| // read only up to the IDs | |
| Record.getBytes16(m); | |
| return; | |
| } else { | |
| m.position(m.position() + extLen); | |
| } | |
| } | |
| } // Otherwise, ignore the remaining bytes. | |
| } | |
| ClientHelloMessage(HandshakeContext handshakeContext, ByteBuffer m, | |
| SSLExtension[] supportedExtensions) throws IOException { | |
| super(handshakeContext); | |
| this.isDTLS = handshakeContext.sslContext.isDTLS(); | |
| this.clientVersion = ((m.get() & 0xFF) << 8) | (m.get() & 0xFF); | |
| this.clientRandom = new RandomCookie(m); | |
| this.sessionId = new SessionId(Record.getBytes8(m)); | |
| try { | |
| sessionId.checkLength(clientVersion); | |
| } catch (SSLProtocolException ex) { | |
| throw handshakeContext.conContext.fatal( | |
| Alert.ILLEGAL_PARAMETER, ex); | |
| } | |
| if (isDTLS) { | |
| this.cookie = Record.getBytes8(m); | |
| } else { | |
| this.cookie = null; | |
| } | |
| byte[] encodedIds = Record.getBytes16(m); | |
| if (encodedIds.length == 0 || (encodedIds.length & 0x01) != 0) { | |
| throw handshakeContext.conContext.fatal( | |
| Alert.ILLEGAL_PARAMETER, | |
| "Invalid ClientHello message"); | |
| } | |
| this.cipherSuiteIds = new int[encodedIds.length >> 1]; | |
| for (int i = 0, j = 0; i < encodedIds.length; i++, j++) { | |
| cipherSuiteIds[j] = | |
| ((encodedIds[i++] & 0xFF) << 8) | (encodedIds[i] & 0xFF); | |
| } | |
| this.cipherSuites = getCipherSuites(cipherSuiteIds); | |
| this.compressionMethod = Record.getBytes8(m); | |
| // In TLS 1.3, use of certain extensions is mandatory. | |
| if (m.hasRemaining()) { | |
| this.extensions = | |
| new SSLExtensions(this, m, supportedExtensions); | |
| } else { | |
| this.extensions = new SSLExtensions(this); | |
| } | |
| } | |
| void setHelloCookie(byte[] cookie) { | |
| this.cookie = cookie; | |
| } | |
| // DTLS 1.0/1.2, for cookie generation. | |
| byte[] getHelloCookieBytes() { | |
| HandshakeOutStream hos = new HandshakeOutStream(null); | |
| try { | |
| // copied from send() method | |
| hos.putInt8((byte)((clientVersion >>> 8) & 0xFF)); | |
| hos.putInt8((byte)(clientVersion & 0xFF)); | |
| hos.write(clientRandom.randomBytes, 0, 32); | |
| hos.putBytes8(sessionId.getId()); | |
| // ignore cookie | |
| hos.putBytes16(getEncodedCipherSuites()); | |
| hos.putBytes8(compressionMethod); | |
| } catch (IOException ioe) { | |
| // unlikely | |
| } | |
| return hos.toByteArray(); | |
| } | |
| // (D)TLS 1.3, for cookie generation. | |
| byte[] getHeaderBytes() { | |
| HandshakeOutStream hos = new HandshakeOutStream(null); | |
| try { | |
| // copied from send() method | |
| hos.putInt8((byte)((clientVersion >>> 8) & 0xFF)); | |
| hos.putInt8((byte)(clientVersion & 0xFF)); | |
| hos.write(clientRandom.randomBytes, 0, 32); | |
| hos.putBytes8(sessionId.getId()); | |
| hos.putBytes16(getEncodedCipherSuites()); | |
| hos.putBytes8(compressionMethod); | |
| } catch (IOException ioe) { | |
| // unlikely | |
| } | |
| return hos.toByteArray(); | |
| } | |
| private static int[] getCipherSuiteIds( | |
| List<CipherSuite> cipherSuites) { | |
| if (cipherSuites != null) { | |
| int[] ids = new int[cipherSuites.size()]; | |
| int i = 0; | |
| for (CipherSuite cipherSuite : cipherSuites) { | |
| ids[i++] = cipherSuite.id; | |
| } | |
| return ids; | |
| } | |
| return new int[0]; | |
| } | |
| private static List<CipherSuite> getCipherSuites(int[] ids) { | |
| List<CipherSuite> cipherSuites = new LinkedList<>(); | |
| for (int id : ids) { | |
| CipherSuite cipherSuite = CipherSuite.valueOf(id); | |
| if (cipherSuite != null) { | |
| cipherSuites.add(cipherSuite); | |
| } | |
| } | |
| return Collections.unmodifiableList(cipherSuites); | |
| } | |
| private List<String> getCipherSuiteNames() { | |
| List<String> names = new LinkedList<>(); | |
| for (int id : cipherSuiteIds) { | |
| names.add(CipherSuite.nameOf(id) + | |
| "(" + Utilities.byte16HexString(id) + ")"); } | |
| return names; | |
| } | |
| private byte[] getEncodedCipherSuites() { | |
| byte[] encoded = new byte[cipherSuiteIds.length << 1]; | |
| int i = 0; | |
| for (int id : cipherSuiteIds) { | |
| encoded[i++] = (byte)(id >> 8); | |
| encoded[i++] = (byte)id; | |
| } | |
| return encoded; | |
| } | |
| @Override | |
| public SSLHandshake handshakeType() { | |
| return SSLHandshake.CLIENT_HELLO; | |
| } | |
| @Override | |
| public int messageLength() { | |
| /* | |
| * Add fixed size parts of each field... | |
| * version + random + session + cipher + compress | |
| */ | |
| return (2 + 32 + 1 + 2 + 1 | |
| + sessionId.length() /* ... + variable parts */ | |
| + (isDTLS ? (1 + cookie.length) : 0) | |
| + (cipherSuiteIds.length * 2) | |
| + compressionMethod.length) | |
| + extensions.length(); // In TLS 1.3, use of certain | |
| // extensions is mandatory. | |
| } | |
| @Override | |
| public void send(HandshakeOutStream hos) throws IOException { | |
| sendCore(hos); | |
| extensions.send(hos); // In TLS 1.3, use of certain | |
| // extensions is mandatory. | |
| } | |
| void sendCore(HandshakeOutStream hos) throws IOException { | |
| hos.putInt8((byte) (clientVersion >>> 8)); | |
| hos.putInt8((byte) clientVersion); | |
| hos.write(clientRandom.randomBytes, 0, 32); | |
| hos.putBytes8(sessionId.getId()); | |
| if (isDTLS) { | |
| hos.putBytes8(cookie); | |
| } | |
| hos.putBytes16(getEncodedCipherSuites()); | |
| hos.putBytes8(compressionMethod); | |
| } | |
| @Override | |
| public String toString() { | |
| MessageFormat messageFormat; | |
| Object[] messageFields; | |
| if (isDTLS) { | |
| messageFormat = new MessageFormat( | |
| """ | |
| "ClientHello": '{' | |
| "client version" : "{0}", | |
| "random" : "{1}", | |
| "session id" : "{2}", | |
| "cookie" : "{3}", | |
| "cipher suites" : "{4}", | |
| "compression methods" : "{5}", | |
| "extensions" : [ | |
| {6} | |
| ] | |
| '}'""", | |
| Locale.ENGLISH); | |
| messageFields = new Object[]{ | |
| ProtocolVersion.nameOf(clientVersion), | |
| Utilities.toHexString(clientRandom.randomBytes), | |
| sessionId.toString(), | |
| Utilities.toHexString(cookie), | |
| getCipherSuiteNames().toString(), | |
| Utilities.toHexString(compressionMethod), | |
| Utilities.indent(Utilities.indent(extensions.toString())) | |
| }; | |
| } else { | |
| messageFormat = new MessageFormat( | |
| """ | |
| "ClientHello": '{' | |
| "client version" : "{0}", | |
| "random" : "{1}", | |
| "session id" : "{2}", | |
| "cipher suites" : "{3}", | |
| "compression methods" : "{4}", | |
| "extensions" : [ | |
| {5} | |
| ] | |
| '}'""", | |
| Locale.ENGLISH); | |
| messageFields = new Object[]{ | |
| ProtocolVersion.nameOf(clientVersion), | |
| Utilities.toHexString(clientRandom.randomBytes), | |
| sessionId.toString(), | |
| getCipherSuiteNames().toString(), | |
| Utilities.toHexString(compressionMethod), | |
| Utilities.indent(Utilities.indent(extensions.toString())) | |
| }; | |
| } | |
| return messageFormat.format(messageFields); | |
| } | |
| } | |
| /** | |
| * The "ClientHello" handshake message kick-start producer. | |
| */ | |
| private static final | |
| class ClientHelloKickstartProducer implements SSLProducer { | |
| // Prevent instantiation of this class. | |
| private ClientHelloKickstartProducer() { | |
| // blank | |
| } | |
| // Produce kickstart handshake message. | |
| @Override | |
| public byte[] produce(ConnectionContext context) throws IOException { | |
| // The producing happens in client side only. | |
| ClientHandshakeContext chc = (ClientHandshakeContext)context; | |
| // clean up this producer | |
| chc.handshakeProducers.remove(SSLHandshake.CLIENT_HELLO.id); | |
| // session ID of the ClientHello message | |
| SessionId sessionId = new SessionId(new byte[0]); | |
| // a list of cipher suites sent by the client | |
| List<CipherSuite> cipherSuites = chc.activeCipherSuites; | |
| // | |
| // Try to resume an existing session. | |
| // | |
| SSLSessionContextImpl ssci = (SSLSessionContextImpl) | |
| chc.sslContext.engineGetClientSessionContext(); | |
| SSLSessionImpl session = ssci.get( | |
| chc.conContext.transport.getPeerHost(), | |
| chc.conContext.transport.getPeerPort()); | |
| if (session != null) { | |
| // If unsafe server certificate change is not allowed, reserve | |
| // current server certificates if the previous handshake is a | |
| // session-resumption abbreviated initial handshake. | |
| if (!ClientHandshakeContext.allowUnsafeServerCertChange && | |
| session.isSessionResumption()) { | |
| try { | |
| // If existing, peer certificate chain cannot be null. | |
| chc.reservedServerCerts = | |
| (X509Certificate[])session.getPeerCertificates(); | |
| } catch (SSLPeerUnverifiedException puve) { | |
| // Maybe not certificate-based, ignore the exception. | |
| } | |
| } | |
| if (!session.isRejoinable()) { | |
| session = null; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, the session is not rejoinable"); | |
| } | |
| } | |
| } | |
| CipherSuite sessionSuite = null; | |
| if (session != null) { | |
| sessionSuite = session.getSuite(); | |
| if (!chc.isNegotiable(sessionSuite)) { | |
| session = null; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, unavailable session cipher suite"); | |
| } | |
| } | |
| } | |
| ProtocolVersion sessionVersion = null; | |
| if (session != null) { | |
| sessionVersion = session.getProtocolVersion(); | |
| if (!chc.isNegotiable(sessionVersion)) { | |
| session = null; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, unavailable protocol version"); | |
| } | |
| } | |
| } | |
| if (session != null && | |
| !sessionVersion.useTLS13PlusSpec() && | |
| SSLConfiguration.useExtendedMasterSecret) { | |
| boolean isEmsAvailable = chc.sslConfig.isAvailable( | |
| SSLExtension.CH_EXTENDED_MASTER_SECRET, sessionVersion); | |
| if (isEmsAvailable && !session.useExtendedMasterSecret && | |
| !SSLConfiguration.allowLegacyResumption) { | |
| // perform full handshake instead | |
| // | |
| // The client SHOULD NOT offer an abbreviated handshake | |
| // to resume a session that does not use an extended | |
| // master secret. Instead, it SHOULD offer a full | |
| // handshake. | |
| session = null; | |
| } | |
| if ((session != null) && | |
| !ClientHandshakeContext.allowUnsafeServerCertChange) { | |
| // It is fine to move on with abbreviate handshake if | |
| // endpoint identification is enabled. | |
| String identityAlg = chc.sslConfig.identificationProtocol; | |
| if (identityAlg == null || identityAlg.isEmpty()) { | |
| if (isEmsAvailable) { | |
| if (!session.useExtendedMasterSecret) { | |
| // perform full handshake instead | |
| session = null; | |
| } // Otherwise, use extended master secret. | |
| } else { | |
| // The extended master secret extension does not | |
| // apply to SSL 3.0. Perform a full handshake | |
| // instead. | |
| // | |
| // Note that the useExtendedMasterSecret is | |
| // extended to protect SSL 3.0 connections, | |
| // by discarding abbreviate handshake. | |
| session = null; | |
| } | |
| } | |
| } | |
| } | |
| // ensure that the endpoint identification algorithm matches the | |
| // one in the session | |
| String identityAlg = chc.sslConfig.identificationProtocol; | |
| if (session != null && identityAlg != null) { | |
| String sessionIdentityAlg = | |
| session.getIdentificationProtocol(); | |
| if (!identityAlg.equalsIgnoreCase(sessionIdentityAlg)) { | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest("Can't resume, endpoint id" + | |
| " algorithm does not match, requested: " + | |
| identityAlg + ", cached: " + sessionIdentityAlg); | |
| } | |
| session = null; | |
| } | |
| } | |
| if (session != null) { | |
| if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest("Try resuming session", session); | |
| } | |
| // only set session id if session is 1.2 or earlier | |
| if (!session.getProtocolVersion().useTLS13PlusSpec()) { | |
| sessionId = session.getSessionId(); | |
| } | |
| // If no new session is allowed, force use of the previous | |
| // session ciphersuite, and add the renegotiation SCSV if | |
| // necessary. | |
| if (!chc.sslConfig.enableSessionCreation) { | |
| if (!chc.conContext.isNegotiated && | |
| !sessionVersion.useTLS13PlusSpec() && | |
| cipherSuites.contains( | |
| CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV)) { | |
| cipherSuites = Arrays.asList(sessionSuite, | |
| CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV); | |
| } else { // otherwise, use renegotiation_info extension | |
| cipherSuites = List.of(sessionSuite); | |
| } | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "No new session is allowed, so try to resume " + | |
| "the session cipher suite only", sessionSuite); | |
| } | |
| } | |
| chc.isResumption = true; | |
| chc.resumingSession = session; | |
| } | |
| if (session == null) { | |
| if (!chc.sslConfig.enableSessionCreation) { | |
| throw new SSLHandshakeException( | |
| "No new session is allowed and " + | |
| "no existing session can be resumed"); | |
| } | |
| } | |
| if (sessionId.length() == 0 && | |
| chc.maximumActiveProtocol.useTLS13PlusSpec() && | |
| SSLConfiguration.useCompatibilityMode) { | |
| // In compatibility mode, the TLS 1.3 legacy_session_id | |
| // field MUST be non-empty, so a client not offering a | |
| // pre-TLS 1.3 session MUST generate a new 32-byte value. | |
| sessionId = | |
| new SessionId(true, chc.sslContext.getSecureRandom()); | |
| } | |
| ProtocolVersion minimumVersion = ProtocolVersion.NONE; | |
| for (ProtocolVersion pv : chc.activeProtocols) { | |
| if (minimumVersion == ProtocolVersion.NONE || | |
| pv.compare(minimumVersion) < 0) { | |
| minimumVersion = pv; | |
| } | |
| } | |
| // exclude SCSV for secure renegotiation | |
| if (!minimumVersion.useTLS13PlusSpec()) { | |
| if (chc.conContext.secureRenegotiation && | |
| cipherSuites.contains( | |
| CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV)) { | |
| // The cipherSuites may be unmodifiable | |
| cipherSuites = new LinkedList<>(cipherSuites); | |
| cipherSuites.remove( | |
| CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV); | |
| } | |
| } | |
| // make sure there is a negotiable cipher suite. | |
| boolean negotiable = false; | |
| for (CipherSuite suite : cipherSuites) { | |
| if (chc.isNegotiable(suite)) { | |
| negotiable = true; | |
| break; | |
| } | |
| } | |
| if (!negotiable) { | |
| throw new SSLHandshakeException("No negotiable cipher suite"); | |
| } | |
| // Create the handshake message. | |
| ProtocolVersion clientHelloVersion = chc.maximumActiveProtocol; | |
| if (clientHelloVersion.useTLS13PlusSpec()) { | |
| // In (D)TLS 1.3, the client indicates its version preferences | |
| // in the "supported_versions" extension and the client_version | |
| // (legacy_version) field MUST be set to (D)TLS 1.2. | |
| if (clientHelloVersion.isDTLS) { | |
| clientHelloVersion = ProtocolVersion.DTLS12; | |
| } else { | |
| clientHelloVersion = ProtocolVersion.TLS12; | |
| } | |
| } | |
| ClientHelloMessage chm = new ClientHelloMessage(chc, | |
| clientHelloVersion.id, sessionId, cipherSuites, | |
| chc.sslContext.getSecureRandom()); | |
| // cache the client random number for further using | |
| chc.clientHelloRandom = chm.clientRandom; | |
| chc.clientHelloVersion = clientHelloVersion.id; | |
| // Produce extensions for ClientHello handshake message. | |
| SSLExtension[] extTypes = chc.sslConfig.getEnabledExtensions( | |
| SSLHandshake.CLIENT_HELLO, chc.activeProtocols); | |
| chm.extensions.produce(chc, extTypes); | |
| if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { | |
| SSLLogger.fine("Produced ClientHello handshake message", chm); | |
| } | |
| // Output the handshake message. | |
| chm.write(chc.handshakeOutput); | |
| chc.handshakeOutput.flush(); | |
| // Reserve the initial ClientHello message for the follow-on | |
| // cookie exchange if needed. | |
| chc.initialClientHelloMsg = chm; | |
| // What's the expected response? | |
| chc.handshakeConsumers.put( | |
| SSLHandshake.SERVER_HELLO.id, SSLHandshake.SERVER_HELLO); | |
| if (chc.sslContext.isDTLS() && | |
| !minimumVersion.useTLS13PlusSpec()) { | |
| chc.handshakeConsumers.put( | |
| SSLHandshake.HELLO_VERIFY_REQUEST.id, | |
| SSLHandshake.HELLO_VERIFY_REQUEST); | |
| } | |
| // The handshake message has been delivered. | |
| return null; | |
| } | |
| } | |
| private static final | |
| class ClientHelloProducer implements HandshakeProducer { | |
| // Prevent instantiation of this class. | |
| private ClientHelloProducer() { | |
| // blank | |
| } | |
| // Response to one of the following handshake message: | |
| // HelloRequest (SSL 3.0/TLS 1.0/1.1/1.2) | |
| // ServerHello(HelloRetryRequest) (TLS 1.3) | |
| // HelloVerifyRequest (DTLS 1.0/1.2) | |
| @Override | |
| public byte[] produce(ConnectionContext context, | |
| HandshakeMessage message) throws IOException { | |
| // The producing happens in client side only. | |
| ClientHandshakeContext chc = (ClientHandshakeContext)context; | |
| SSLHandshake ht = message.handshakeType(); | |
| if (ht == null) { | |
| throw new UnsupportedOperationException("Not supported yet."); | |
| } | |
| switch (ht) { | |
| case HELLO_REQUEST: | |
| // SSL 3.0/TLS 1.0/1.1/1.2 | |
| try { | |
| chc.kickstart(); | |
| } catch (IOException ioe) { | |
| throw chc.conContext.fatal( | |
| Alert.HANDSHAKE_FAILURE, ioe); | |
| } | |
| // The handshake message has been delivered. | |
| return null; | |
| case HELLO_VERIFY_REQUEST: | |
| // DTLS 1.0/1.2 | |
| // | |
| // The HelloVerifyRequest consumer should have updated the | |
| // ClientHello handshake message with cookie. | |
| if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { | |
| SSLLogger.fine( | |
| "Produced ClientHello(cookie) handshake message", | |
| chc.initialClientHelloMsg); | |
| } | |
| // Output the handshake message. | |
| chc.initialClientHelloMsg.write(chc.handshakeOutput); | |
| chc.handshakeOutput.flush(); | |
| // What's the expected response? | |
| chc.handshakeConsumers.put(SSLHandshake.SERVER_HELLO.id, | |
| SSLHandshake.SERVER_HELLO); | |
| ProtocolVersion minimumVersion = ProtocolVersion.NONE; | |
| for (ProtocolVersion pv : chc.activeProtocols) { | |
| if (minimumVersion == ProtocolVersion.NONE || | |
| pv.compare(minimumVersion) < 0) { | |
| minimumVersion = pv; | |
| } | |
| } | |
| if (chc.sslContext.isDTLS() && | |
| !minimumVersion.useTLS13PlusSpec()) { | |
| chc.handshakeConsumers.put( | |
| SSLHandshake.HELLO_VERIFY_REQUEST.id, | |
| SSLHandshake.HELLO_VERIFY_REQUEST); | |
| } | |
| // The handshake message has been delivered. | |
| return null; | |
| case HELLO_RETRY_REQUEST: | |
| // TLS 1.3 | |
| // The HelloRetryRequest consumer should have updated the | |
| // ClientHello handshake message with cookie. | |
| if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { | |
| SSLLogger.fine( | |
| "Produced ClientHello(HRR) handshake message", | |
| chc.initialClientHelloMsg); | |
| } | |
| // Output the handshake message. | |
| chc.initialClientHelloMsg.write(chc.handshakeOutput); | |
| chc.handshakeOutput.flush(); | |
| // What's the expected response? | |
| chc.conContext.consumers.putIfAbsent( | |
| ContentType.CHANGE_CIPHER_SPEC.id, | |
| ChangeCipherSpec.t13Consumer); | |
| chc.handshakeConsumers.put(SSLHandshake.SERVER_HELLO.id, | |
| SSLHandshake.SERVER_HELLO); | |
| // The handshake message has been delivered. | |
| return null; | |
| default: | |
| throw new UnsupportedOperationException( | |
| "Not supported yet."); | |
| } | |
| } | |
| } | |
| /** | |
| * The "ClientHello" handshake message consumer. | |
| */ | |
| private static final class ClientHelloConsumer implements SSLConsumer { | |
| // Prevent instantiation of this class. | |
| private ClientHelloConsumer() { | |
| // blank | |
| } | |
| @Override | |
| public void consume(ConnectionContext context, | |
| ByteBuffer message) throws IOException { | |
| // The consuming happens in server side only. | |
| ServerHandshakeContext shc = (ServerHandshakeContext)context; | |
| // clean up this consumer | |
| shc.handshakeConsumers.remove(SSLHandshake.CLIENT_HELLO.id); | |
| if (!shc.handshakeConsumers.isEmpty()) { | |
| throw shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, | |
| "No more handshake message allowed " + | |
| "in a ClientHello flight"); | |
| } | |
| // Get enabled extension types in ClientHello handshake message. | |
| SSLExtension[] enabledExtensions = | |
| shc.sslConfig.getEnabledExtensions( | |
| SSLHandshake.CLIENT_HELLO); | |
| ClientHelloMessage chm = | |
| new ClientHelloMessage(shc, message, enabledExtensions); | |
| if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { | |
| SSLLogger.fine("Consuming ClientHello handshake message", chm); | |
| } | |
| shc.clientHelloVersion = chm.clientVersion; | |
| onClientHello(shc, chm); | |
| } | |
| private void onClientHello(ServerHandshakeContext context, | |
| ClientHelloMessage clientHello) throws IOException { | |
| // Negotiate protocol version. | |
| // | |
| // Check and launch SupportedVersions. | |
| SSLExtension[] extTypes = new SSLExtension[] { | |
| SSLExtension.CH_SUPPORTED_VERSIONS | |
| }; | |
| clientHello.extensions.consumeOnLoad(context, extTypes); | |
| ProtocolVersion negotiatedProtocol; | |
| CHSupportedVersionsSpec svs = | |
| (CHSupportedVersionsSpec)context.handshakeExtensions.get( | |
| SSLExtension.CH_SUPPORTED_VERSIONS); | |
| if (svs != null) { | |
| negotiatedProtocol = | |
| negotiateProtocol(context, svs.requestedProtocols); | |
| } else { | |
| negotiatedProtocol = | |
| negotiateProtocol(context, clientHello.clientVersion); | |
| } | |
| context.negotiatedProtocol = negotiatedProtocol; | |
| if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) { | |
| SSLLogger.fine( | |
| "Negotiated protocol version: " + negotiatedProtocol.name); | |
| } | |
| // Protocol version is negotiated, update locally supported | |
| // signature schemes according to the protocol being used. | |
| SignatureScheme.updateHandshakeLocalSupportedAlgs(context); | |
| // Consume the handshake message for the specific protocol version. | |
| if (negotiatedProtocol.isDTLS) { | |
| if (negotiatedProtocol.useTLS13PlusSpec()) { | |
| d13HandshakeConsumer.consume(context, clientHello); | |
| } else { | |
| d12HandshakeConsumer.consume(context, clientHello); | |
| } | |
| } else { | |
| if (negotiatedProtocol.useTLS13PlusSpec()) { | |
| t13HandshakeConsumer.consume(context, clientHello); | |
| } else { | |
| t12HandshakeConsumer.consume(context, clientHello); | |
| } | |
| } | |
| } | |
| // Select a protocol version according to the | |
| // ClientHello.client_version. | |
| private ProtocolVersion negotiateProtocol( | |
| ServerHandshakeContext context, | |
| int clientHelloVersion) throws SSLException { | |
| // Per TLS 1.3 specification, server MUST negotiate TLS 1.2 or prior | |
| // even if ClientHello.client_version is 0x0304 or later. | |
| int chv = clientHelloVersion; | |
| if (context.sslContext.isDTLS()) { | |
| if (chv < ProtocolVersion.DTLS12.id) { | |
| chv = ProtocolVersion.DTLS12.id; | |
| } | |
| } else { | |
| if (chv > ProtocolVersion.TLS12.id) { | |
| chv = ProtocolVersion.TLS12.id; | |
| } | |
| } | |
| // Select a protocol version from the activated protocols. | |
| ProtocolVersion pv = ProtocolVersion.selectedFrom( | |
| context.activeProtocols, chv); | |
| if (pv == null || pv == ProtocolVersion.NONE || | |
| pv == ProtocolVersion.SSL20Hello) { | |
| throw context.conContext.fatal(Alert.PROTOCOL_VERSION, | |
| "Client requested protocol " + | |
| ProtocolVersion.nameOf(clientHelloVersion) + | |
| " is not enabled or supported in server context"); | |
| } | |
| return pv; | |
| } | |
| // Select a protocol version according to the | |
| // supported_versions extension. | |
| private ProtocolVersion negotiateProtocol( | |
| ServerHandshakeContext context, | |
| int[] clientSupportedVersions) throws SSLException { | |
| // The client supported protocol versions are present in client | |
| // preference order. This implementation chooses to use the server | |
| // preference of protocol versions instead. | |
| for (ProtocolVersion spv : context.activeProtocols) { | |
| if (spv == ProtocolVersion.SSL20Hello) { | |
| continue; | |
| } | |
| for (int cpv : clientSupportedVersions) { | |
| if (cpv == ProtocolVersion.SSL20Hello.id) { | |
| continue; | |
| } | |
| if (spv.id == cpv) { | |
| return spv; | |
| } | |
| } | |
| } | |
| // No protocol version can be negotiated. | |
| throw context.conContext.fatal(Alert.PROTOCOL_VERSION, | |
| "The client supported protocol versions " + Arrays.toString( | |
| ProtocolVersion.toStringArray(clientSupportedVersions)) + | |
| " are not accepted by server preferences " + Arrays.toString( | |
| ProtocolVersion.toStringArray(context.activeProtocols))); | |
| } | |
| } | |
| /** | |
| * The "ClientHello" handshake message consumer for TLS 1.2 and | |
| * prior SSL/TLS protocol versions. | |
| */ | |
| private static final | |
| class T12ClientHelloConsumer implements HandshakeConsumer { | |
| // Prevent instantiation of this class. | |
| private T12ClientHelloConsumer() { | |
| // blank | |
| } | |
| @Override | |
| public void consume(ConnectionContext context, | |
| HandshakeMessage message) throws IOException { | |
| // The consuming happens in server side only. | |
| ServerHandshakeContext shc = (ServerHandshakeContext)context; | |
| ClientHelloMessage clientHello = (ClientHelloMessage)message; | |
| // | |
| // validate | |
| // | |
| // Reject client initiated renegotiation? | |
| // | |
| // If server side should reject client-initiated renegotiation, | |
| // send an Alert.HANDSHAKE_FAILURE fatal alert, not a | |
| // no_renegotiation warning alert (no_renegotiation must be a | |
| // warning: RFC 2246). no_renegotiation might seem more | |
| // natural at first, but warnings are not appropriate because | |
| // the sending party does not know how the receiving party | |
| // will behave. This state must be treated as a fatal server | |
| // condition. | |
| // | |
| // This will not have any impact on server initiated renegotiation. | |
| if (shc.conContext.isNegotiated) { | |
| if (!shc.conContext.secureRenegotiation && | |
| !HandshakeContext.allowUnsafeRenegotiation) { | |
| throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE, | |
| "Unsafe renegotiation is not allowed"); | |
| } | |
| if (ServerHandshakeContext.rejectClientInitiatedRenego && | |
| !shc.kickstartMessageDelivered) { | |
| throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE, | |
| "Client initiated renegotiation is not allowed"); | |
| } | |
| } | |
| // Consume a Session Ticket Extension if it exists | |
| SSLExtension[] ext = new SSLExtension[]{ | |
| SSLExtension.CH_SESSION_TICKET | |
| }; | |
| clientHello.extensions.consumeOnLoad(shc, ext); | |
| // Does the client want to resume a session? | |
| if (clientHello.sessionId.length() != 0 || shc.statelessResumption) { | |
| SSLSessionContextImpl cache = (SSLSessionContextImpl)shc.sslContext | |
| .engineGetServerSessionContext(); | |
| SSLSessionImpl previous; | |
| // Use the stateless session ticket if provided | |
| if (shc.statelessResumption) { | |
| previous = shc.resumingSession; | |
| } else { | |
| previous = cache.get(clientHello.sessionId.getId()); | |
| } | |
| boolean resumingSession = | |
| (previous != null) && previous.isRejoinable(); | |
| if (!resumingSession) { | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, " + | |
| "the existing session is not rejoinable"); | |
| } | |
| } | |
| // Validate the negotiated protocol version. | |
| if (resumingSession) { | |
| ProtocolVersion sessionProtocol = | |
| previous.getProtocolVersion(); | |
| if (sessionProtocol != shc.negotiatedProtocol) { | |
| resumingSession = false; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, not the same protocol version"); | |
| } | |
| } | |
| } | |
| // Validate the required client authentication. | |
| if (resumingSession && | |
| (shc.sslConfig.clientAuthType == CLIENT_AUTH_REQUIRED)) { | |
| try { | |
| previous.getPeerPrincipal(); | |
| } catch (SSLPeerUnverifiedException e) { | |
| resumingSession = false; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, " + | |
| "client authentication is required"); | |
| } | |
| } | |
| } | |
| // Validate that the cached cipher suite. | |
| if (resumingSession) { | |
| CipherSuite suite = previous.getSuite(); | |
| if ((!shc.isNegotiable(suite)) || | |
| (!clientHello.cipherSuites.contains(suite))) { | |
| resumingSession = false; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, " + | |
| "the session cipher suite is absent"); | |
| } | |
| } | |
| } | |
| // ensure that the endpoint identification algorithm matches the | |
| // one in the session | |
| String identityAlg = shc.sslConfig.identificationProtocol; | |
| if (resumingSession && identityAlg != null) { | |
| String sessionIdentityAlg = | |
| previous.getIdentificationProtocol(); | |
| if (!identityAlg.equalsIgnoreCase(sessionIdentityAlg)) { | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest("Can't resume, endpoint id" + | |
| " algorithm does not match, requested: " + | |
| identityAlg + ", cached: " + sessionIdentityAlg); | |
| } | |
| resumingSession = false; | |
| } | |
| } | |
| // So far so good. Note that the handshake extensions may reset | |
| // the resuming options later. | |
| shc.isResumption = resumingSession; | |
| shc.resumingSession = resumingSession ? previous : null; | |
| if (!resumingSession && SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake")) { | |
| SSLLogger.fine("Session not resumed."); | |
| } | |
| } | |
| // cache the client random number for further using | |
| shc.clientHelloRandom = clientHello.clientRandom; | |
| // Check and launch ClientHello extensions. | |
| SSLExtension[] extTypes = shc.sslConfig.getExclusiveExtensions( | |
| SSLHandshake.CLIENT_HELLO, | |
| List.of(SSLExtension.CH_SESSION_TICKET)); | |
| clientHello.extensions.consumeOnLoad(shc, extTypes); | |
| // | |
| // update | |
| // | |
| if (!shc.conContext.isNegotiated) { | |
| shc.conContext.protocolVersion = shc.negotiatedProtocol; | |
| shc.conContext.outputRecord.setVersion(shc.negotiatedProtocol); | |
| } | |
| // update the responders | |
| // | |
| // Only need to ServerHello, which may add more responders later. | |
| // Note that ServerHello and HelloRetryRequest share the same | |
| // handshake type/id. The ServerHello producer may be replaced | |
| // by HelloRetryRequest producer if needed. | |
| shc.handshakeProducers.put(SSLHandshake.SERVER_HELLO.id, | |
| SSLHandshake.SERVER_HELLO); | |
| // | |
| // produce | |
| // | |
| SSLHandshake[] probableHandshakeMessages = new SSLHandshake[] { | |
| SSLHandshake.SERVER_HELLO, | |
| // full handshake messages | |
| SSLHandshake.CERTIFICATE, | |
| SSLHandshake.CERTIFICATE_STATUS, | |
| SSLHandshake.SERVER_KEY_EXCHANGE, | |
| SSLHandshake.CERTIFICATE_REQUEST, | |
| SSLHandshake.SERVER_HELLO_DONE, | |
| // abbreviated handshake messages | |
| SSLHandshake.FINISHED | |
| }; | |
| for (SSLHandshake hs : probableHandshakeMessages) { | |
| HandshakeProducer handshakeProducer = | |
| shc.handshakeProducers.remove(hs.id); | |
| if (handshakeProducer != null) { | |
| handshakeProducer.produce(context, clientHello); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * The "ClientHello" handshake message consumer for TLS 1.3. | |
| */ | |
| private static final | |
| class T13ClientHelloConsumer implements HandshakeConsumer { | |
| // Prevent instantiation of this class. | |
| private T13ClientHelloConsumer() { | |
| // blank | |
| } | |
| @Override | |
| public void consume(ConnectionContext context, | |
| HandshakeMessage message) throws IOException { | |
| // The consuming happens in server side only. | |
| ServerHandshakeContext shc = (ServerHandshakeContext)context; | |
| ClientHelloMessage clientHello = (ClientHelloMessage)message; | |
| // [RFC 8446] TLS 1.3 forbids renegotiation. If a server has | |
| // negotiated TLS 1.3 and receives a ClientHello at any other | |
| // time, it MUST terminate the connection with an | |
| // "unexpected_message" alert. | |
| if (shc.conContext.isNegotiated) { | |
| throw shc.conContext.fatal(Alert.UNEXPECTED_MESSAGE, | |
| "Received unexpected renegotiation handshake message"); | |
| } | |
| if (clientHello.clientVersion != ProtocolVersion.TLS12.id) { | |
| throw shc.conContext.fatal(Alert.PROTOCOL_VERSION, | |
| "The ClientHello.legacy_version field is not TLS 1.2"); | |
| } | |
| // The client may send a dummy change_cipher_spec record | |
| // immediately after the first ClientHello. | |
| shc.conContext.consumers.putIfAbsent( | |
| ContentType.CHANGE_CIPHER_SPEC.id, | |
| ChangeCipherSpec.t13Consumer); | |
| // Is it a resumption? | |
| // | |
| // Check and launch the "psk_key_exchange_modes" and | |
| // "pre_shared_key" extensions first, which will reset the | |
| // resuming session, no matter the extensions present or not. | |
| shc.isResumption = true; | |
| SSLExtension[] extTypes = new SSLExtension[] { | |
| SSLExtension.PSK_KEY_EXCHANGE_MODES, | |
| SSLExtension.CH_PRE_SHARED_KEY | |
| }; | |
| clientHello.extensions.consumeOnLoad(shc, extTypes); | |
| // Check and launch ClientHello extensions other than | |
| // "psk_key_exchange_modes", "pre_shared_key", "protocol_version" | |
| // and "key_share" extensions. | |
| // | |
| // These extensions may discard session resumption, or ask for | |
| // hello retry. | |
| extTypes = shc.sslConfig.getExclusiveExtensions( | |
| SSLHandshake.CLIENT_HELLO, | |
| Arrays.asList( | |
| SSLExtension.PSK_KEY_EXCHANGE_MODES, | |
| SSLExtension.CH_PRE_SHARED_KEY, | |
| SSLExtension.CH_SUPPORTED_VERSIONS)); | |
| clientHello.extensions.consumeOnLoad(shc, extTypes); | |
| if (!shc.handshakeProducers.isEmpty()) { | |
| // Should be HelloRetryRequest producer. | |
| goHelloRetryRequest(shc, clientHello); | |
| } else { | |
| goServerHello(shc, clientHello); | |
| } | |
| } | |
| private void goHelloRetryRequest(ServerHandshakeContext shc, | |
| ClientHelloMessage clientHello) throws IOException { | |
| HandshakeProducer handshakeProducer = | |
| shc.handshakeProducers.remove( | |
| SSLHandshake.HELLO_RETRY_REQUEST.id); | |
| if (handshakeProducer != null) { | |
| handshakeProducer.produce(shc, clientHello); | |
| } else { | |
| // unlikely | |
| throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE, | |
| "No HelloRetryRequest producer: " + shc.handshakeProducers); | |
| } | |
| if (!shc.handshakeProducers.isEmpty()) { | |
| // unlikely, but please double-check. | |
| throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE, | |
| "unknown handshake producers: " + shc.handshakeProducers); | |
| } | |
| } | |
| private void goServerHello(ServerHandshakeContext shc, | |
| ClientHelloMessage clientHello) throws IOException { | |
| // | |
| // validate | |
| // | |
| shc.clientHelloRandom = clientHello.clientRandom; | |
| // | |
| // update | |
| // | |
| if (!shc.conContext.isNegotiated) { | |
| shc.conContext.protocolVersion = shc.negotiatedProtocol; | |
| shc.conContext.outputRecord.setVersion(shc.negotiatedProtocol); | |
| } | |
| // update the responders | |
| // | |
| // Only ServerHello/HelloRetryRequest producer, which adds | |
| // more responders later. | |
| shc.handshakeProducers.put(SSLHandshake.SERVER_HELLO.id, | |
| SSLHandshake.SERVER_HELLO); | |
| SSLHandshake[] probableHandshakeMessages = new SSLHandshake[] { | |
| SSLHandshake.SERVER_HELLO, | |
| // full handshake messages | |
| SSLHandshake.ENCRYPTED_EXTENSIONS, | |
| SSLHandshake.CERTIFICATE_REQUEST, | |
| SSLHandshake.CERTIFICATE, | |
| SSLHandshake.CERTIFICATE_VERIFY, | |
| SSLHandshake.FINISHED | |
| }; | |
| // | |
| // produce | |
| // | |
| for (SSLHandshake hs : probableHandshakeMessages) { | |
| HandshakeProducer handshakeProducer = | |
| shc.handshakeProducers.remove(hs.id); | |
| if (handshakeProducer != null) { | |
| handshakeProducer.produce(shc, clientHello); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * The "ClientHello" handshake message consumer for DTLS 1.2 and | |
| * previous DTLS protocol versions. | |
| */ | |
| private static final | |
| class D12ClientHelloConsumer implements HandshakeConsumer { | |
| // Prevent instantiation of this class. | |
| private D12ClientHelloConsumer() { | |
| // blank | |
| } | |
| @Override | |
| public void consume(ConnectionContext context, | |
| HandshakeMessage message) throws IOException { | |
| // The consuming happens in server side only. | |
| ServerHandshakeContext shc = (ServerHandshakeContext)context; | |
| ClientHelloMessage clientHello = (ClientHelloMessage)message; | |
| // | |
| // validate | |
| // | |
| // Reject client initiated renegotiation? | |
| // | |
| // If server side should reject client-initiated renegotiation, | |
| // send an Alert.HANDSHAKE_FAILURE fatal alert, not a | |
| // no_renegotiation warning alert (no_renegotiation must be a | |
| // warning: RFC 2246). no_renegotiation might seem more | |
| // natural at first, but warnings are not appropriate because | |
| // the sending party does not know how the receiving party | |
| // will behave. This state must be treated as a fatal server | |
| // condition. | |
| // | |
| // This will not have any impact on server initiated renegotiation. | |
| if (shc.conContext.isNegotiated) { | |
| if (!shc.conContext.secureRenegotiation && | |
| !HandshakeContext.allowUnsafeRenegotiation) { | |
| throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE, | |
| "Unsafe renegotiation is not allowed"); | |
| } | |
| if (ServerHandshakeContext.rejectClientInitiatedRenego && | |
| !shc.kickstartMessageDelivered) { | |
| throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE, | |
| "Client initiated renegotiation is not allowed"); | |
| } | |
| } | |
| // Does the client want to resume a session? | |
| if (clientHello.sessionId.length() != 0) { | |
| SSLSessionContextImpl cache = (SSLSessionContextImpl)shc.sslContext | |
| .engineGetServerSessionContext(); | |
| // Consume a Session Ticket Extension if it exists | |
| SSLExtension[] ext = new SSLExtension[]{ | |
| SSLExtension.CH_SESSION_TICKET | |
| }; | |
| clientHello.extensions.consumeOnLoad(shc, ext); | |
| SSLSessionImpl previous; | |
| // Use stateless session ticket if provided. | |
| if (shc.statelessResumption) { | |
| previous = shc.resumingSession; | |
| } else { | |
| previous = cache.get(clientHello.sessionId.getId()); | |
| } | |
| boolean resumingSession = | |
| (previous != null) && previous.isRejoinable(); | |
| if (!resumingSession) { | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, " + | |
| "the existing session is not rejoinable"); | |
| } | |
| } | |
| // Validate the negotiated protocol version. | |
| if (resumingSession) { | |
| ProtocolVersion sessionProtocol = | |
| previous.getProtocolVersion(); | |
| if (sessionProtocol != shc.negotiatedProtocol) { | |
| resumingSession = false; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, not the same protocol version"); | |
| } | |
| } | |
| } | |
| // Validate the required client authentication. | |
| if (resumingSession && | |
| (shc.sslConfig.clientAuthType == CLIENT_AUTH_REQUIRED)) { | |
| try { | |
| previous.getPeerPrincipal(); | |
| } catch (SSLPeerUnverifiedException e) { | |
| resumingSession = false; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, " + | |
| "client authentication is required"); | |
| } | |
| } | |
| } | |
| // Validate that the cached cipher suite. | |
| if (resumingSession) { | |
| CipherSuite suite = previous.getSuite(); | |
| if ((!shc.isNegotiable(suite)) || | |
| (!clientHello.cipherSuites.contains(suite))) { | |
| resumingSession = false; | |
| if (SSLLogger.isOn && | |
| SSLLogger.isOn("ssl,handshake,verbose")) { | |
| SSLLogger.finest( | |
| "Can't resume, " + | |
| "the session cipher suite is absent"); | |
| } | |
| } | |
| } | |
| // So far so good. Note that the handshake extensions may reset | |
| // the resuming options later. | |
| shc.isResumption = resumingSession; | |
| shc.resumingSession = resumingSession ? previous : null; | |
| } | |
| // We will by default exchange DTLS cookies for all handshakes | |
| // (new and resumed) unless jdk.tls.enableDtlsResumeCookie=false. | |
| // The property only affects the cookie exchange for resumption. | |
| if (!shc.isResumption || SSLConfiguration.enableDtlsResumeCookie) { | |
| HelloCookieManager hcm = | |
| shc.sslContext.getHelloCookieManager(ProtocolVersion.DTLS10); | |
| if (!hcm.isCookieValid(shc, clientHello, clientHello.cookie)) { | |
| // | |
| // Perform cookie exchange for DTLS handshaking if no cookie | |
| // or the cookie is invalid in the ClientHello message. | |
| // | |
| // update the responders | |
| shc.handshakeProducers.put( | |
| SSLHandshake.HELLO_VERIFY_REQUEST.id, | |
| SSLHandshake.HELLO_VERIFY_REQUEST); | |
| // | |
| // produce response handshake message | |
| // | |
| SSLHandshake.HELLO_VERIFY_REQUEST.produce(context, clientHello); | |
| return; | |
| } | |
| } | |
| // cache the client random number for further using | |
| shc.clientHelloRandom = clientHello.clientRandom; | |
| // Check and launch ClientHello extensions. | |
| SSLExtension[] extTypes = shc.sslConfig.getEnabledExtensions( | |
| SSLHandshake.CLIENT_HELLO); | |
| clientHello.extensions.consumeOnLoad(shc, extTypes); | |
| // | |
| // update | |
| // | |
| if (!shc.conContext.isNegotiated) { | |
| shc.conContext.protocolVersion = shc.negotiatedProtocol; | |
| shc.conContext.outputRecord.setVersion(shc.negotiatedProtocol); | |
| } | |
| // update the responders | |
| // | |
| // Only need to ServerHello, which may add more responders later. | |
| shc.handshakeProducers.put(SSLHandshake.SERVER_HELLO.id, | |
| SSLHandshake.SERVER_HELLO); | |
| // Reset the ClientHello non-zero offset fragment allowance | |
| shc.acceptCliHelloFragments = false; | |
| // | |
| // produce | |
| // | |
| SSLHandshake[] probableHandshakeMessages = new SSLHandshake[] { | |
| SSLHandshake.SERVER_HELLO, | |
| // full handshake messages | |
| SSLHandshake.CERTIFICATE, | |
| SSLHandshake.CERTIFICATE_STATUS, | |
| SSLHandshake.SERVER_KEY_EXCHANGE, | |
| SSLHandshake.CERTIFICATE_REQUEST, | |
| SSLHandshake.SERVER_HELLO_DONE, | |
| // abbreviated handshake messages | |
| SSLHandshake.FINISHED | |
| }; | |
| for (SSLHandshake hs : probableHandshakeMessages) { | |
| HandshakeProducer handshakeProducer = | |
| shc.handshakeProducers.remove(hs.id); | |
| if (handshakeProducer != null) { | |
| handshakeProducer.produce(context, clientHello); | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * The "ClientHello" handshake message consumer for DTLS 1.3. | |
| */ | |
| private static final | |
| class D13ClientHelloConsumer implements HandshakeConsumer { | |
| // Prevent instantiation of this class. | |
| private D13ClientHelloConsumer() { | |
| // blank | |
| } | |
| @Override | |
| public void consume(ConnectionContext context, | |
| HandshakeMessage message) throws IOException { | |
| throw new UnsupportedOperationException("Not supported yet."); | |
| } | |
| } | |
| } |