/*

 * 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;

import sun.security.util.*;

import java.io.IOException;

import sun.security.krb5.Asn1Exception;

import sun.security.krb5.internal.ccache.CCacheOutputStream;

public class AuthorizationDataEntry implements Cloneable {

    public int adType;

    public byte[] adData;

    private AuthorizationDataEntry() {

    }

    public AuthorizationDataEntry(

            int new_adType,

            byte[] new_adData) {

        adType = new_adType;

        adData = new_adData;

    }

    public Object clone() {

        AuthorizationDataEntry new_authorizationDataEntry =

                new AuthorizationDataEntry();

        new_authorizationDataEntry.adType = adType;

        if (adData != null) {

            new_authorizationDataEntry.adData = new byte[adData.length];

            System.arraycopy(adData, 0,

                    new_authorizationDataEntry.adData, 0, adData.length);

        }

        return new_authorizationDataEntry;

    }

    /**

     * Constructs an instance of AuthorizationDataEntry.

     * @param encoding a single DER-encoded value.

     */

    public AuthorizationDataEntry(DerValue encoding) throws Asn1Exception, IOException {

        DerValue der;

        if (encoding.getTag() != DerValue.tag_Sequence) {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

        der = encoding.getData().getDerValue();

        if ((der.getTag() & (byte) 0x1F) == (byte) 0x00) {

            adType = der.getData().getBigInteger().intValue();

        } else {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

        der = encoding.getData().getDerValue();

        if ((der.getTag() & (byte) 0x1F) == (byte) 0x01) {

            adData = der.getData().getOctetString();

        } else {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

        if (encoding.getData().available() > 0) {

            throw new Asn1Exception(Krb5.ASN1_BAD_ID);

        }

    }

    /**

     * Encodes an AuthorizationDataEntry object.

     * @return byte array of encoded AuthorizationDataEntry object.

     * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.

     * @exception IOException if an I/O error occurs while reading encoded data.

     */

    public byte[] asn1Encode() throws Asn1Exception, IOException {

        DerOutputStream bytes = new DerOutputStream();

        DerOutputStream temp = new DerOutputStream();

        temp.putInteger(adType);

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), temp);

        temp = new DerOutputStream();

        temp.putOctetString(adData);

        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), temp);

        temp = new DerOutputStream();

        temp.write(DerValue.tag_Sequence, bytes);

        return temp.toByteArray();

    }

    /**

     * Writes the entry's data fields in FCC format to an output stream.

     *

     * @param cos a <code>CCacheOutputStream</code>.

     * @exception IOException if an I/O exception occurs.

     */

    public void writeEntry(CCacheOutputStream cos) throws IOException {

        cos.write16(adType);

        cos.write32(adData.length);

        cos.write(adData, 0, adData.length);

    }

    public String toString() {

        return ("adType=" + adType + " adData.length=" + adData.length);

    }

}