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/*
* Copyright (c) 2002, 2016, 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.validator;
import java.util.Set;
import java.util.HashSet;
import java.util.Collections;
import java.util.Enumeration;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.cert.X509Certificate;
import java.security.cert.Certificate;
/**
* Collection of static utility methods related to trust anchor KeyStores.
*
* @author Andreas Sterbenz
*/
public final class TrustStoreUtil {
private TrustStoreUtil() {
// empty
}
/**
* Return an unmodifiable Set with all trusted X509Certificates contained
* in the specified KeyStore.
*/
public static Set<X509Certificate> getTrustedCerts(KeyStore ks) {
Set<X509Certificate> set = new HashSet<>();
try {
for (Enumeration<String> e = ks.aliases(); e.hasMoreElements(); ) {
String alias = e.nextElement();
if (ks.isCertificateEntry(alias)) {
Certificate cert = ks.getCertificate(alias);
if (cert instanceof X509Certificate) {
set.add((X509Certificate)cert);
}
} else if (ks.isKeyEntry(alias)) {
Certificate[] certs = ks.getCertificateChain(alias);
if ((certs != null) && (certs.length > 0) &&
(certs[0] instanceof X509Certificate)) {
set.add((X509Certificate)certs[0]);
}
}
}
} catch (KeyStoreException e) {
// ignore
//
// This should be rare, but better to log this in the future.
}
return Collections.unmodifiableSet(set);
}
}
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