/*

 * 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.internal.*;

import sun.security.krb5.internal.util.KrbDataOutputStream;

import java.io.IOException;

import java.io.FileOutputStream;

import java.io.OutputStream;

import java.io.UnsupportedEncodingException;

/**

 * This class implements a buffered input stream. It is used for parsing key table

 * data to memory.

 *

 * @author Yanni Zhang

 *

 */

public class KeyTabOutputStream extends KrbDataOutputStream implements KeyTabConstants {

    private KeyTabEntry entry;

    private int keyType;

    private byte[] keyValue;

    public int version;

    public KeyTabOutputStream(OutputStream os) {

        super(os);

    }

    public void writeVersion(int num) throws IOException {

        version = num;

        write16(num);           //we use the standard version.

    }

    public void writeEntry(KeyTabEntry entry) throws IOException {

        write32(entry.entryLength());

        String[] serviceNames =  entry.service.getNameStrings();

        int comp_num = serviceNames.length;

        if (version == KRB5_KT_VNO_1) {

            write16(comp_num + 1);

        }

        else write16(comp_num);

        byte[] realm = null;

        try {

            realm = entry.service.getRealmString().getBytes("8859_1");

        } catch (UnsupportedEncodingException exc) {

        }

        write16(realm.length);

        write(realm);

        for (int i = 0; i < comp_num; i++) {

            try {

                write16(serviceNames[i].getBytes("8859_1").length);

                write(serviceNames[i].getBytes("8859_1"));

            } catch (UnsupportedEncodingException exc) {

            }

        }

        write32(entry.service.getNameType());

        //time is long, but we only use 4 bytes to store the data.

        write32((int)(entry.timestamp.getTime()/1000));

        // the key version might be a 32 bit extended number.

        write8(entry.keyVersion % 256 );

        write16(entry.keyType);

        write16(entry.keyblock.length);

        write(entry.keyblock);

        // if the key version isn't smaller than 256, it could be saved as

        // extension key version number in 4 bytes. The nonzero extension

        // key version number will be trusted. However, it isn't standardized

        // yet, we won't support it.

        // if (entry.keyVersion >= 256) {

        //    write32(entry.keyVersion);

        //}

    }

}