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/*
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* Copyright 1997-2007 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.security.ssl;
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import java.util.*;
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import java.security.*;
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import java.security.cert.*;
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import javax.net.ssl.*;
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import com.sun.net.ssl.internal.ssl.X509ExtendedTrustManager;
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import sun.security.validator.*;
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import sun.security.util.HostnameChecker;
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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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*
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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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* @author Xuelei Fan
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*/
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final class X509TrustManagerImpl extends X509ExtendedTrustManager
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implements X509TrustManager {
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/**
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* Flag indicating whether to enable revocation check for the PKIX trust
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* manager. Typically, this will only work if the PKIX implementation
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* supports CRL distribution points as we do not manually setup CertStores.
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*/
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private final static boolean checkRevocation =
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Debug.getBooleanProperty("com.sun.net.ssl.checkRevocation", false);
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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 static final Debug debug = Debug.getInstance("ssl");
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X509TrustManagerImpl(String validatorType, KeyStore ks)
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throws KeyStoreException {
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this.validatorType = validatorType;
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this.pkixParams = null;
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if (ks == null) {
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trustedCerts = Collections.<X509Certificate>emptySet();
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} else {
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trustedCerts = KeyStores.getTrustedCerts(ks);
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}
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showTrustedCerts();
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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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showTrustedCerts();
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}
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private void showTrustedCerts() {
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if (debug != null && Debug.isOn("trustmanager")) {
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for (X509Certificate cert : trustedCerts) {
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System.out.println("adding as trusted cert:");
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System.out.println(" Subject: "
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+ cert.getSubjectX500Principal());
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System.out.println(" Issuer: "
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+ cert.getIssuerX500Principal());
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System.out.println(" Algorithm: "
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+ cert.getPublicKey().getAlgorithm()
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+ "; Serial number: 0x"
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+ cert.getSerialNumber().toString(16));
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System.out.println(" Valid from "
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+ cert.getNotBefore() + " until "
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+ cert.getNotAfter());
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System.out.println();
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}
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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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// if the PKIX validator is created from a KeyStore,
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// disable revocation checking
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if (v instanceof PKIXValidator) {
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PKIXValidator pkixValidator = (PKIXValidator)v;
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pkixValidator.getParameters().setRevocationEnabled
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(checkRevocation);
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}
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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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private static X509Certificate[] validate(Validator v,
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X509Certificate[] chain, String authType) throws CertificateException {
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Object o = JsseJce.beginFipsProvider();
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try {
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return v.validate(chain, null, authType);
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} finally {
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JsseJce.endFipsProvider(o);
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}
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}
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/**
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* Returns true if the client certificate can be trusted.
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*
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* @param chain certificates which establish an identity for the client.
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* Chains of arbitrary length are supported, and certificates
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* marked internally as trusted will short-circuit signature checks.
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* @throws IllegalArgumentException if null or zero-length chain
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* is passed in for the chain parameter or if null or zero-length
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* string is passed in for the authType parameter.
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* @throws CertificateException if the certificate chain is not trusted
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* by this TrustManager.
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*/
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public void checkClientTrusted(X509Certificate chain[], String authType)
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throws CertificateException {
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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.length() == 0) {
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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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// assume double checked locking with a volatile flag works
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// (guaranteed under the new Tiger memory model)
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Validator v = clientValidator;
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if (v == null) {
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synchronized (this) {
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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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}
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}
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X509Certificate[] trustedChain = validate(v, chain, null);
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if (debug != null && Debug.isOn("trustmanager")) {
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System.out.println("Found trusted certificate:");
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System.out.println(trustedChain[trustedChain.length - 1]);
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}
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}
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/**
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* Returns true if the server certifcate can be trusted.
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*
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* @param chain certificates which establish an identity for the server.
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* Chains of arbitrary length are supported, and certificates
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* marked internally as trusted will short-circuit signature checks.
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* @throws IllegalArgumentException if null or zero-length chain
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* is passed in for the chain parameter or if null or zero-length
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* string is passed in for the authType parameter.
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* @throws CertificateException if the certificate chain is not trusted
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* by this TrustManager.
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*/
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public void checkServerTrusted(X509Certificate chain[], String authType)
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throws CertificateException {
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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.length() == 0) {
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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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// assume double checked locking with a volatile flag works
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// (guaranteed under the new Tiger memory model)
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Validator v = serverValidator;
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if (v == null) {
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synchronized (this) {
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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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}
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}
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X509Certificate[] trustedChain = validate(v, chain, authType);
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if (debug != null && Debug.isOn("trustmanager")) {
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System.out.println("Found trusted certificate:");
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System.out.println(trustedChain[trustedChain.length - 1]);
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}
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}
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/**
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* Returns a list of CAs accepted to authenticate entities for the
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* specified purpose.
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*
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* @param purpose activity for which CAs should be trusted
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* @return list of CAs accepted for authenticating such tasks
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*/
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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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/**
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* Given the partial or complete certificate chain provided by the
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* peer, check its identity and build a certificate path to a trusted
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* root, return if it can be validated and is trusted for client SSL
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* authentication based on the authentication type.
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*/
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public void checkClientTrusted(X509Certificate[] chain, String authType,
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String hostname, String algorithm) throws CertificateException {
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checkClientTrusted(chain, authType);
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checkIdentity(hostname, chain[0], algorithm);
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}
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/**
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* Given the partial or complete certificate chain provided by the
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* peer, check its identity and build a certificate path to a trusted
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* root, return if it can be validated and is trusted for server SSL
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* authentication based on the authentication type.
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*/
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public void checkServerTrusted(X509Certificate[] chain, String authType,
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String hostname, String algorithm) throws CertificateException {
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checkServerTrusted(chain, authType);
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checkIdentity(hostname, chain[0], algorithm);
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}
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// Identify the peer by its certificate and hostname.
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private void checkIdentity(String hostname, X509Certificate cert,
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String algorithm) throws CertificateException {
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if (algorithm != null && algorithm.length() != 0) {
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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);
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} else if (algorithm.equalsIgnoreCase("LDAP")) {
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HostnameChecker.getInstance(HostnameChecker.TYPE_LDAP).match(
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hostname, cert);
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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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