/*

 * 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.

 */

/*

 *

 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.

 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.

 */

package sun.security.krb5.internal.ktab;

import sun.security.krb5.*;

import sun.security.krb5.internal.*;

import java.io.UnsupportedEncodingException;

/**

 * This class represents a Key Table entry. Each entry contains the service principal of

 * the key, time stamp, key version and secret key itself.

 *

 * @author Yanni Zhang

 */

public class KeyTabEntry implements KeyTabConstants {

    PrincipalName service;

    Realm realm;

    KerberosTime timestamp;

    int keyVersion;

    int keyType;

    byte[] keyblock = null;

    boolean DEBUG = Krb5.DEBUG;

    public KeyTabEntry (PrincipalName new_service, Realm new_realm, KerberosTime new_time,

                        int new_keyVersion, int new_keyType, byte[] new_keyblock) {

        service = new_service;

        realm = new_realm;

        timestamp = new_time;

        keyVersion = new_keyVersion;

        keyType = new_keyType;

        if (new_keyblock != null) {

            keyblock = new_keyblock.clone();

        }

    }

    public PrincipalName getService() {

        return service;

    }

    public EncryptionKey getKey() {

        EncryptionKey key = new EncryptionKey(keyblock,

                                              keyType,

        return key;

    }

    public String getKeyString() {

        StringBuilder sb = new StringBuilder("0x");

        for (int i = 0; i < keyblock.length; i++) {

            sb.append(String.format("%02x", keyblock[i]&0xff));

        }

        return sb.toString();

    }

    public int entryLength() {

        int totalPrincipalLength = 0;

        String[] names = service.getNameStrings();

        for (int i = 0; i < names.length; i++) {

            try {

                totalPrincipalLength += principalSize + names[i].getBytes("8859_1").length;

            } catch (UnsupportedEncodingException exc) {

            }

        }

        int realmLen = 0;

        try {

            realmLen = realm.toString().getBytes("8859_1").length;

        } catch (UnsupportedEncodingException exc) {

        }

        int size = principalComponentSize +  realmSize + realmLen

            + totalPrincipalLength + principalTypeSize

            + timestampSize + keyVersionSize

            + keyTypeSize + keySize + keyblock.length;

        if (DEBUG) {

            System.out.println(">>> KeyTabEntry: key tab entry size is " + size);

        }

        return size;

    }

    public KerberosTime getTimeStamp() {

        return timestamp;

    }

}