bersequence.java

这是linux下ssl vpn的实现程序

/*
 *  SSL-Explorer
 *
 *  Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2 of
 *  the License, or (at your option) any later version.
 *  This program 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 for more details.
 *
 *  You should have received a copy of the GNU General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
			
package com.maverick.crypto.asn1;

import java.io.IOException;
import java.util.Enumeration;

public class BERSequence
    extends DERSequence
{
    /**
     * create an empty sequence
     */
    public BERSequence()
    {
    }

    /**
     * create a sequence containing one object
     */
    public BERSequence(
        DEREncodable    obj)
    {
        super(obj);
    }

    /**
     * create a sequence containing a vector of objects.
     */
    public BERSequence(
        DEREncodableVector   v)
    {
        super(v);
    }

    /*
     */
    void encode(
        DEROutputStream out)
        throws IOException
    {
        if (out instanceof ASN1OutputStream || out instanceof BEROutputStream)
        {
            out.write(SEQUENCE | CONSTRUCTED);
            out.write(0x80);

            Enumeration e = getObjects();
            while (e.hasMoreElements())
            {
                out.writeObject(e.nextElement());
            }

            out.write(0x00);
            out.write(0x00);
        }
        else
        {
            super.encode(out);
        }
    }
}