/*

 * Copyright (c) 2002, 2006, 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.io.*;

import java.util.*;

import java.security.*;

import java.security.cert.*;

import java.security.cert.Certificate;

import sun.security.action.*;

/**

 * Collection of static utility methods related to KeyStores.

 *

 * @author Andreas Sterbenz

 */

public class KeyStores {

    private KeyStores() {

        // empty

    }

    // in the future, all accesses to the system cacerts keystore should

    // go through this class. but not right now.

/*

        (String)AccessController.doPrivileged(new GetPropertyAction("java.home"));

    private static KeyStore caCerts;

    private static KeyStore getKeyStore(String type, String name,

            char[] password) throws IOException {

        if (type == null) {

            type = "JKS";

        }

        try {

            KeyStore ks = KeyStore.getInstance(type);

            FileInputStream in = (FileInputStream)AccessController.doPrivileged

                                        (new OpenFileInputStreamAction(name));

            ks.load(in, password);

            return ks;

        } catch (GeneralSecurityException e) {

            // XXX

            throw new IOException();

        } catch (PrivilegedActionException e) {

            throw (IOException)e.getCause();

        }

    }

    /**

     * Return a KeyStore with the contents of the lib/security/cacerts file.

     * The file is only opened once per JVM invocation and the contents

     * cached subsequently.

     *

        if (caCerts != null) {

            return caCerts;

        }

        String name = javaHome + SEP + "lib" + SEP + "security" + SEP + "cacerts";

        caCerts = getKeyStore(null, name, null);

        return caCerts;

    }

*/

    /**

     * Return a Set with all trusted X509Certificates contained in

     * this KeyStore.

     */

    public static Set<X509Certificate> getTrustedCerts(KeyStore ks) {

        Set<X509Certificate> set = new HashSet<X509Certificate>();

        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

        }

        return set;

    }

}