/*

 * Copyright 1997 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.security.x509;

import java.io.IOException;

import java.math.BigInteger;

import sun.misc.HexDumpEncoder;

import sun.security.util.*;

/**

 * This class defines the UniqueIdentity class used by certificates.

 *

 * @author Amit Kapoor

 * @author Hemma Prafullchandra

 */

public class UniqueIdentity {

    // Private data members

    private BitArray    id;

    /**

     * The default constructor for this class.

     *

     * @param id the byte array containing the unique identifier.

     */

    public UniqueIdentity(BitArray id) {

        this.id = id;

    }

    /**

     * The default constructor for this class.

     *

     * @param id the byte array containing the unique identifier.

     */

    public UniqueIdentity(byte[] id) {

        this.id = new BitArray(id.length*8, id);

    }

    /**

     * Create the object, decoding the values from the passed DER stream.

     *

     * @param in the DerInputStream to read the UniqueIdentity from.

     * @exception IOException on decoding errors.

     */

    public UniqueIdentity(DerInputStream in) throws IOException {

        DerValue derVal = in.getDerValue();

        id = derVal.getUnalignedBitString(true);

    }

    /**

     * Create the object, decoding the values from the passed DER stream.

     *

     * @param derVal the DerValue decoded from the stream.

     * @param tag the tag the value is encoded under.

     * @exception IOException on decoding errors.

     */

    public UniqueIdentity(DerValue derVal) throws IOException {

        id = derVal.getUnalignedBitString(true);

    }

    /**

     * Return the UniqueIdentity as a printable string.

     */

    public String toString() {

        return ("UniqueIdentity:" + id.toString() + "\n");

    }

    /**

     * Encode the UniqueIdentity in DER form to the stream.

     *

     * @param out the DerOutputStream to marshal the contents to.

     * @param tag enocode it under the following tag.

     * @exception IOException on errors.

     */

    public void encode(DerOutputStream out, byte tag) throws IOException {

        byte[] bytes = id.toByteArray();

        int excessBits = bytes.length*8 - id.length();

        out.write(tag);

        out.putLength(bytes.length + 1);

        out.write(excessBits);

        out.write(bytes);

    }

    /**

     * Return the unique id.

     */

    public boolean[] getId() {

        if (id == null) return null;

        return id.toBooleanArray();

    }

}