Logo Search packages:      
Sourcecode: libgnucrypto-java version File versions

DERSequence.java

/*
 * Copyright (c) 2000 The Legion Of The Bouncy Castle
 * (http://www.bouncycastle.org)
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * 
 */

package org.bouncycastle.asn1;

import java.io.*;
import java.util.*;

public class DERSequence
    extends ASN1Sequence
{
    /**
     * create an empty sequence
     */
    public DERSequence()
    {
    }

    /**
     * create a sequence containing one object
     */
    public DERSequence(
        DEREncodable    obj)
    {
        this.addObject(obj);
    }

    /**
     * create a sequence containing a vector of objects.
     */
    public DERSequence(
        DEREncodableVector   v)
    {
        for (int i = 0; i != v.size(); i++)
        {
            this.addObject(v.get(i));
        }
    }

    /*
     * A note on the implementation:
     * <p>
     * As DER requires the constructed, definite-length model to
     * be used for structured types, this varies slightly from the
     * ASN.1 descriptions given. Rather than just outputing SEQUENCE,
     * we also have to specify CONSTRUCTED, and the objects length.
     */
    void encode(
        DEROutputStream out)
        throws IOException
    {
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        DEROutputStream         dOut = new DEROutputStream(bOut);
        Enumeration             e = this.getObjects();

        while (e.hasMoreElements())
        {
            Object    obj = e.nextElement();

            dOut.writeObject(obj);
        }

        dOut.close();

        byte[]  bytes = bOut.toByteArray();

        out.writeEncoded(SEQUENCE | CONSTRUCTED, bytes);
    }
}

Generated by  Doxygen 1.6.0   Back to index