Java example source code file (KRBSafeBody.java)

This example Java source code file (KRBSafeBody.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

asn1exception, deroutputstream, dervalue, hostaddress, integer, ioexception, kerberostime, krbsafebody, math, util

The KRBSafeBody.java Java example source code

/*
 * 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 sun.security.krb5.Asn1Exception;
import java.util.Vector;
import java.io.IOException;
import java.math.BigInteger;

/**
 * Implements the ASN.1 KRBSafeBody type.
 *
 * <xmp>
 * KRB-SAFE-BODY   ::= SEQUENCE {
 *         user-data       [0] OCTET STRING,
 *         timestamp       [1] KerberosTime OPTIONAL,
 *         usec            [2] Microseconds OPTIONAL,
 *         seq-number      [3] UInt32 OPTIONAL,
 *         s-address       [4] HostAddress,
 *         r-address       [5] HostAddress OPTIONAL
 * }
 * </xmp>
 *
 * <p>
 * This definition reflects the Network Working Group RFC 4120
 * specification available at
 * <a href="http://www.ietf.org/rfc/rfc4120.txt">
 * http://www.ietf.org/rfc/rfc4120.txt</a>.
 */

public class KRBSafeBody {
    public byte[] userData = null;
    public KerberosTime timestamp; //optional
    public Integer usec; //optional
    public Integer seqNumber; //optional
    public HostAddress sAddress;
    public HostAddress rAddress; //optional

    public KRBSafeBody(
                       byte[] new_userData,
                       KerberosTime new_timestamp,
                       Integer new_usec,
                       Integer new_seqNumber,
                       HostAddress new_sAddress,
                       HostAddress new_rAddress
                           ) {
        if (new_userData != null) {
            userData = new_userData.clone();
        }
        timestamp = new_timestamp;
        usec = new_usec;
        seqNumber = new_seqNumber;
        sAddress = new_sAddress;
        rAddress = new_rAddress;
    }


    /**
     * Constructs a KRBSafeBody object.
     * @param encoding a Der-encoded data.
     * @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 KRBSafeBody(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() & 0x1F) == 0x00) {
            userData = der.getData().getOctetString();
        }
        else
            throw new Asn1Exception(Krb5.ASN1_BAD_ID);
        timestamp = KerberosTime.parse(encoding.getData(), (byte)0x01, true);
        if ((encoding.getData().peekByte() & 0x1F) == 0x02) {
            der = encoding.getData().getDerValue();
            usec = new Integer(der.getData().getBigInteger().intValue());
        }
        if ((encoding.getData().peekByte() & 0x1F) == 0x03) {
            der = encoding.getData().getDerValue();
            seqNumber = new Integer(der.getData().getBigInteger().intValue());
        }
        sAddress = HostAddress.parse(encoding.getData(), (byte)0x04, false);
        if (encoding.getData().available() > 0)
            rAddress = HostAddress.parse(encoding.getData(), (byte)0x05, true);
        if (encoding.getData().available() > 0)
            throw new Asn1Exception(Krb5.ASN1_BAD_ID);
    }

    /**
     * Encodes an KRBSafeBody object.
     * @return the byte array of encoded KRBSafeBody 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.putOctetString(userData);
        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);
        if (timestamp != null)
        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), timestamp.asn1Encode());
        if (usec != null) {
            temp = new DerOutputStream();
            temp.putInteger(BigInteger.valueOf(usec.intValue()));
            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), temp);
        }
        if (seqNumber != null) {
            temp = new DerOutputStream();
            // encode as an unsigned integer (UInt32)
            temp.putInteger(BigInteger.valueOf(seqNumber.longValue()));
            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), temp);
        }
        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x04), sAddress.asn1Encode());
        if (rAddress != null)
        temp = new DerOutputStream();
        temp.write(DerValue.tag_Sequence, bytes);
        return temp.toByteArray();
    }

    /**
     * Parse (unmarshal) a KRBSafeBody from a DER input stream.  This form
     * parsing might be used when expanding a value which is part of
     * a constructed sequence and uses explicitly tagged type.
     *
     * @exception Asn1Exception on error.
     * @param data the Der input stream value, which contains one or more marshaled value.
     * @param explicitTag tag number.
     * @param optional indicates if this data field is optional
     * @return an instance of KRBSafeBody.
     *
     */
    public static KRBSafeBody parse(DerInputStream data, byte explicitTag, boolean optional) throws Asn1Exception, IOException {
        if ((optional) && (((byte)data.peekByte() & (byte)0x1F) != explicitTag))
            return null;
        DerValue der = data.getDerValue();
        if (explicitTag != (der.getTag() & (byte)0x1F))
            throw new Asn1Exception(Krb5.ASN1_BAD_ID);
        else {
            DerValue subDer = der.getData().getDerValue();
            return new KRBSafeBody(subDer);
        }
    }



}