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479 lines
18 KiB
Java
479 lines
18 KiB
Java
/*
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* Copyright (c) 1997, 2024, 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.net.Socket;
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import java.security.*;
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import java.security.cert.*;
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import java.util.*;
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import java.util.concurrent.locks.ReentrantLock;
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import javax.net.ssl.*;
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import sun.security.util.AnchorCertificates;
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import sun.security.util.HostnameChecker;
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import sun.security.validator.*;
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/**
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* This class implements the SunJSSE X.509 trust manager using the internal
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* validator API in J2SE core. The logic in this class is minimal.<p>
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* <p>
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* This class supports both the Simple validation algorithm from previous
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* JSSE versions and PKIX validation. Currently, it is not possible for the
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* application to specify PKIX parameters other than trust anchors. This will
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* be fixed in a future release using new APIs. When that happens, it may also
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* make sense to separate the Simple and PKIX trust managers into separate
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* classes.
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*
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* @author Andreas Sterbenz
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*/
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final class X509TrustManagerImpl extends X509ExtendedTrustManager
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implements X509TrustManager {
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private final String validatorType;
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/**
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* The Set of trusted X509Certificates.
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*/
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private final Collection<X509Certificate> trustedCerts;
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private final PKIXBuilderParameters pkixParams;
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// note that we need separate validator for client and server due to
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// the different extension checks. They are initialized lazily on demand.
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private volatile Validator clientValidator, serverValidator;
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private final ReentrantLock validatorLock = new ReentrantLock();
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X509TrustManagerImpl(String validatorType,
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Collection<X509Certificate> trustedCerts) {
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this.validatorType = validatorType;
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this.pkixParams = null;
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if (trustedCerts == null) {
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trustedCerts = Collections.emptySet();
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}
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this.trustedCerts = trustedCerts;
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,trustmanager")) {
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SSLLogger.fine("adding as trusted certificates",
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(Object[])trustedCerts.toArray(new X509Certificate[0]));
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}
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}
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X509TrustManagerImpl(String validatorType, PKIXBuilderParameters params) {
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this.validatorType = validatorType;
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this.pkixParams = params;
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// create server validator eagerly so that we can conveniently
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// get the trusted certificates
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// clients need it anyway eventually, and servers will not mind
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// the little extra footprint
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Validator v = getValidator(Validator.VAR_TLS_SERVER);
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trustedCerts = v.getTrustedCertificates();
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serverValidator = v;
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,trustmanager")) {
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SSLLogger.fine("adding as trusted certificates",
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(Object[])trustedCerts.toArray(new X509Certificate[0]));
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}
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}
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@Override
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public void checkClientTrusted(X509Certificate[] chain, String authType)
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throws CertificateException {
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checkTrusted(chain, authType, (Socket)null, true);
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}
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@Override
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public void checkServerTrusted(X509Certificate[] chain, String authType)
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throws CertificateException {
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checkTrusted(chain, authType, (Socket)null, false);
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}
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@Override
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public X509Certificate[] getAcceptedIssuers() {
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X509Certificate[] certsArray = new X509Certificate[trustedCerts.size()];
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trustedCerts.toArray(certsArray);
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return certsArray;
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}
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@Override
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public void checkClientTrusted(X509Certificate[] chain, String authType,
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Socket socket) throws CertificateException {
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checkTrusted(chain, authType, socket, true);
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}
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@Override
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public void checkServerTrusted(X509Certificate[] chain, String authType,
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Socket socket) throws CertificateException {
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checkTrusted(chain, authType, socket, false);
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}
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@Override
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public void checkClientTrusted(X509Certificate[] chain, String authType,
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SSLEngine engine) throws CertificateException {
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checkTrusted(chain, authType, engine, true);
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}
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@Override
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public void checkServerTrusted(X509Certificate[] chain, String authType,
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SSLEngine engine) throws CertificateException {
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checkTrusted(chain, authType, engine, false);
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}
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private Validator checkTrustedInit(X509Certificate[] chain,
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String authType, boolean checkClientTrusted) {
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if (chain == null || chain.length == 0) {
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throw new IllegalArgumentException(
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"null or zero-length certificate chain");
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}
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if (authType == null || authType.isEmpty()) {
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throw new IllegalArgumentException(
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"null or zero-length authentication type");
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}
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Validator v;
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if (checkClientTrusted) {
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v = clientValidator;
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if (v == null) {
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validatorLock.lock();
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try {
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v = clientValidator;
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if (v == null) {
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v = getValidator(Validator.VAR_TLS_CLIENT);
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clientValidator = v;
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}
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} finally {
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validatorLock.unlock();
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}
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}
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} else {
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// assume double-checked locking with a volatile flag works
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// (guaranteed under the new Tiger memory model)
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v = serverValidator;
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if (v == null) {
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validatorLock.lock();
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try {
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v = serverValidator;
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if (v == null) {
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v = getValidator(Validator.VAR_TLS_SERVER);
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serverValidator = v;
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}
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} finally {
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validatorLock.unlock();
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}
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}
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}
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return v;
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}
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private void checkTrusted(X509Certificate[] chain,
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String authType, Socket socket,
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boolean checkClientTrusted) throws CertificateException {
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Validator v = checkTrustedInit(chain, authType, checkClientTrusted);
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X509Certificate[] trustedChain;
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if ((socket != null) && socket.isConnected() &&
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(socket instanceof SSLSocket sslSocket)) {
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SSLSession session = sslSocket.getHandshakeSession();
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if (session == null) {
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throw new CertificateException("No handshake session");
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}
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// create the algorithm constraints
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boolean isExtSession = (session instanceof ExtendedSSLSession);
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AlgorithmConstraints constraints;
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if (isExtSession &&
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ProtocolVersion.useTLS12PlusSpec(session.getProtocol())) {
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ExtendedSSLSession extSession = (ExtendedSSLSession)session;
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String[] localSupportedSignAlgs =
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extSession.getLocalSupportedSignatureAlgorithms();
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constraints = SSLAlgorithmConstraints.forSocket(
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sslSocket, localSupportedSignAlgs, false);
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} else {
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constraints = SSLAlgorithmConstraints.forSocket(sslSocket, false);
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}
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// Grab any stapled OCSP responses for use in validation
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List<byte[]> responseList = Collections.emptyList();
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if (!checkClientTrusted && isExtSession) {
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responseList =
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((ExtendedSSLSession)session).getStatusResponses();
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}
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trustedChain = v.validate(chain, null, responseList,
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constraints, checkClientTrusted ? null : authType);
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// check endpoint identity
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String identityAlg = sslSocket.getSSLParameters().
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getEndpointIdentificationAlgorithm();
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if (identityAlg != null && !identityAlg.isEmpty()) {
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checkIdentity(session,
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trustedChain, identityAlg, checkClientTrusted);
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}
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} else {
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trustedChain = v.validate(chain, null, Collections.emptyList(),
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null, checkClientTrusted ? null : authType);
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}
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,trustmanager")) {
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SSLLogger.fine("Found trusted certificate",
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trustedChain[trustedChain.length - 1]);
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}
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}
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private void checkTrusted(X509Certificate[] chain,
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String authType, SSLEngine engine,
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boolean checkClientTrusted) throws CertificateException {
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Validator v = checkTrustedInit(chain, authType, checkClientTrusted);
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X509Certificate[] trustedChain;
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if (engine != null) {
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SSLSession session = engine.getHandshakeSession();
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if (session == null) {
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throw new CertificateException("No handshake session");
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}
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// create the algorithm constraints
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boolean isExtSession = (session instanceof ExtendedSSLSession);
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AlgorithmConstraints constraints;
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if (isExtSession &&
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ProtocolVersion.useTLS12PlusSpec(session.getProtocol())) {
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ExtendedSSLSession extSession = (ExtendedSSLSession)session;
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String[] localSupportedSignAlgs =
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extSession.getLocalSupportedSignatureAlgorithms();
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constraints = SSLAlgorithmConstraints.forEngine(
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engine, localSupportedSignAlgs, false);
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} else {
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constraints = SSLAlgorithmConstraints.forEngine(engine, false);
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}
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// Grab any stapled OCSP responses for use in validation
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List<byte[]> responseList = Collections.emptyList();
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if (!checkClientTrusted && isExtSession) {
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responseList =
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((ExtendedSSLSession)session).getStatusResponses();
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}
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trustedChain = v.validate(chain, null, responseList,
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constraints, checkClientTrusted ? null : authType);
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// check endpoint identity
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String identityAlg = engine.getSSLParameters().
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getEndpointIdentificationAlgorithm();
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if (identityAlg != null && !identityAlg.isEmpty()) {
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checkIdentity(session, trustedChain,
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identityAlg, checkClientTrusted);
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}
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} else {
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trustedChain = v.validate(chain, null, Collections.emptyList(),
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null, checkClientTrusted ? null : authType);
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}
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,trustmanager")) {
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SSLLogger.fine("Found trusted certificate",
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trustedChain[trustedChain.length - 1]);
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}
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}
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private Validator getValidator(String variant) {
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Validator v;
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if (pkixParams == null) {
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v = Validator.getInstance(validatorType, variant, trustedCerts);
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} else {
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v = Validator.getInstance(validatorType, variant, pkixParams);
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}
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return v;
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}
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// Get string representation of HostName from a list of server names.
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//
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// We are only accepting host_name name type in the list.
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private static String getHostNameInSNI(List<SNIServerName> sniNames) {
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SNIHostName hostname = null;
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for (SNIServerName sniName : sniNames) {
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if (sniName.getType() != StandardConstants.SNI_HOST_NAME) {
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continue;
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}
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if (sniName instanceof SNIHostName) {
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hostname = (SNIHostName)sniName;
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} else {
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try {
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hostname = new SNIHostName(sniName.getEncoded());
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} catch (IllegalArgumentException iae) {
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// unlikely to happen, just in case ...
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if (SSLLogger.isOn && SSLLogger.isOn("ssl,trustmanager")) {
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SSLLogger.fine("Illegal server name: " + sniName);
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}
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}
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}
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// no more than server name of the same name type
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break;
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}
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if (hostname != null) {
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return hostname.getAsciiName();
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}
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return null;
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}
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// Also used by X509KeyManagerImpl
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static List<SNIServerName> getRequestedServerNames(Socket socket) {
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if (socket != null && socket.isConnected() &&
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socket instanceof SSLSocket) {
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return getRequestedServerNames(
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((SSLSocket)socket).getHandshakeSession());
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}
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return Collections.emptyList();
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}
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// Also used by X509KeyManagerImpl
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static List<SNIServerName> getRequestedServerNames(SSLEngine engine) {
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if (engine != null) {
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return getRequestedServerNames(engine.getHandshakeSession());
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}
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return Collections.emptyList();
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}
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private static List<SNIServerName> getRequestedServerNames(
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SSLSession session) {
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if (session instanceof ExtendedSSLSession) {
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return ((ExtendedSSLSession)session).getRequestedServerNames();
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}
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return Collections.emptyList();
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}
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/*
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* Per RFC 6066, if an application negotiates a server name using an
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* application protocol and then upgrades to TLS, and if a server_name
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* extension is sent, then the extension SHOULD contain the same name
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* that was negotiated in the application protocol. If the server_name
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* is established in the TLS session handshake, the client SHOULD NOT
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* attempt to request a different server name at the application layer.
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*
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* According to the above spec, we only need to check either the identity
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* in server_name extension or the peer host of the connection. Peer host
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* is not always a reliable fully qualified domain name. The HostName in
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* server_name extension is more reliable than peer host. So we prefer
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* the identity checking against the server_name extension if present, and
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* may failover to peer host checking.
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*/
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static void checkIdentity(SSLSession session,
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X509Certificate[] trustedChain,
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String algorithm,
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boolean checkClientTrusted) throws CertificateException {
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// check if EE certificate chains to a public root CA (as
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// pre-installed in cacerts)
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boolean chainsToPublicCA = AnchorCertificates.contains(
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trustedChain[trustedChain.length - 1]);
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boolean identifiable = false;
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String peerHost = session.getPeerHost();
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// Is it a Fully-Qualified Domain Names (FQDN) ending with a dot?
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if (peerHost != null && peerHost.endsWith(".")) {
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// Remove the ending dot, which is not allowed in SNIHostName.
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peerHost = peerHost.substring(0, peerHost.length() - 1);
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}
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if (!checkClientTrusted) {
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List<SNIServerName> sniNames = getRequestedServerNames(session);
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String sniHostName = getHostNameInSNI(sniNames);
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if (sniHostName != null) {
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try {
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checkIdentity(sniHostName,
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trustedChain[0], algorithm, chainsToPublicCA);
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identifiable = true;
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} catch (CertificateException ce) {
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if (sniHostName.equalsIgnoreCase(peerHost)) {
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throw ce;
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}
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// otherwise, failover to check peer host
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}
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}
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}
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if (!identifiable) {
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try {
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checkIdentity(peerHost,
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trustedChain[0], algorithm, chainsToPublicCA);
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} catch(CertificateException ce) {
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if (checkClientTrusted && "HTTPS".equalsIgnoreCase(algorithm)) {
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throw new CertificateException("Endpoint Identification Algorithm " +
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"HTTPS is not supported on the server side");
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} else {
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throw ce;
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}
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}
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}
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}
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/*
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* Identify the peer by its certificate and hostname.
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*
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* Lifted from sun.net.www.protocol.https.HttpsClient.
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*/
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static void checkIdentity(String hostname, X509Certificate cert,
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String algorithm) throws CertificateException {
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checkIdentity(hostname, cert, algorithm, false);
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}
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private static void checkIdentity(String hostname, X509Certificate cert,
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String algorithm, boolean chainsToPublicCA)
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throws CertificateException {
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if (algorithm != null && !algorithm.isEmpty()) {
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// if IPv6 strip off the "[]"
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if ((hostname != null) && hostname.startsWith("[") &&
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hostname.endsWith("]")) {
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hostname = hostname.substring(1, hostname.length() - 1);
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}
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if (algorithm.equalsIgnoreCase("HTTPS")) {
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HostnameChecker.getInstance(HostnameChecker.TYPE_TLS).match(
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hostname, cert, chainsToPublicCA);
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} else if (algorithm.equalsIgnoreCase("LDAP") ||
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algorithm.equalsIgnoreCase("LDAPS")) {
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HostnameChecker.getInstance(HostnameChecker.TYPE_LDAP).match(
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hostname, cert, chainsToPublicCA);
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} else {
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throw new CertificateException(
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"Unknown identification algorithm: " + algorithm);
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}
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}
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}
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}
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