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// --- BEGIN COPYRIGHT BLOCK ---
// 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; version 2 of the License.
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmsutil.ocsp;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.mozilla.jss.asn1.ASN1Template;
import org.mozilla.jss.asn1.ASN1Value;
import org.mozilla.jss.asn1.InvalidBERException;
import org.mozilla.jss.asn1.OBJECT_IDENTIFIER;
import org.mozilla.jss.asn1.OCTET_STRING;
import org.mozilla.jss.asn1.SEQUENCE;
import org.mozilla.jss.asn1.Tag;

/**
 * RFC 2560:
 * 
 * <pre>
 * ResponseBytes ::=       SEQUENCE {
 *     responseType   OBJECT IDENTIFIER,
 *     response       OCTET STRING }
 * </pre>
 * 
 * @version $Revision$ $Date$
 */
public class ResponseBytes implements ASN1Value {
    ///////////////////////////////////////////////////////////////////////
    // Members and member access
    ///////////////////////////////////////////////////////////////////////
    public final static OBJECT_IDENTIFIER OCSP =
            new OBJECT_IDENTIFIER("1.3.6.1.5.5.7.48.1");
    public final static OBJECT_IDENTIFIER OCSP_BASIC =
            new OBJECT_IDENTIFIER("1.3.6.1.5.5.7.48.1.1");

    private OBJECT_IDENTIFIER responseType = null;
    private OCTET_STRING response = null;
    private SEQUENCE sequence;

    public OBJECT_IDENTIFIER getObjectIdentifier() {
        return responseType;
    }

    public OCTET_STRING getResponse() {
        return response;
    }

    public ResponseBytes(OBJECT_IDENTIFIER responseType, OCTET_STRING response) {
        sequence = new SEQUENCE();

        this.responseType = responseType;
        sequence.addElement(responseType);

        this.response = response;
        sequence.addElement(response);
    }

    ///////////////////////////////////////////////////////////////////////
    // encoding/decoding
    ///////////////////////////////////////////////////////////////////////

    private static final Tag TAG = SEQUENCE.TAG;

    public Tag getTag() {
        return TAG;
    }

    public void encode(OutputStream ostream) throws IOException {
        encode(TAG, ostream);
    }

    public void encode(Tag implicitTag, OutputStream ostream)
            throws IOException {
        sequence.encode(implicitTag, ostream);
    }

    private static final Template templateInstance = new Template();

    public static Template getTemplate() {
        return templateInstance;
    }

    /**
     * A Template for decoding <code>ResponseBytes</code>.
     */
    public static class Template implements ASN1Template {

        private SEQUENCE.Template seqt;

        public Template() {
            seqt = new SEQUENCE.Template();
            seqt.addElement(OBJECT_IDENTIFIER.getTemplate());
            seqt.addElement(OCTET_STRING.getTemplate());
        }

        public boolean tagMatch(Tag tag) {
            return TAG.equals(tag);
        }

        public ASN1Value decode(InputStream istream)
                throws InvalidBERException, IOException {
            return decode(TAG, istream);
        }

        public ASN1Value decode(Tag implicitTag, InputStream istream)
                throws InvalidBERException, IOException {
            SEQUENCE seq = (SEQUENCE) seqt.decode(implicitTag, istream);

            return new ResponseBytes(
                    (OBJECT_IDENTIFIER) seq.elementAt(0),
                    (OCTET_STRING) seq.elementAt(1));
        }
    }
}