AuthorizationDataEntry.java

/*
 * 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);
    }
	
}