jdk/src/share/classes/sun/security/krb5/internal/EncKrbPrivPart.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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.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 EncKrbPrivPart type.
 *
 * <xmp>
 * EncKrbPrivPart  ::= [APPLICATION 28] SEQUENCE {
 *         user-data       [0] OCTET STRING,
 *         timestamp       [1] KerberosTime OPTIONAL,
 *         usec            [2] Microseconds OPTIONAL,
 *         seq-number      [3] UInt32 OPTIONAL,
 *         s-address       [4] HostAddress -- sender's addr --,
 *         r-address       [5] HostAddress OPTIONAL -- recip's addr
 * }
 * </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 EncKrbPrivPart {
        public byte[] userData = null;
        public KerberosTime timestamp; //optional
        public Integer usec; //optional
        public Integer seqNumber; //optional
        public HostAddress sAddress; //optional
        public HostAddress rAddress; //optional

        public EncKrbPrivPart(
                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;
        }

        public EncKrbPrivPart(byte[] data) throws Asn1Exception, IOException {
                init(new DerValue(data));
        }

        public EncKrbPrivPart(DerValue encoding) throws Asn1Exception, IOException {
                init(encoding);
        }

        /**
         * Initializes an EncKrbPrivPart object.
         * @param encoding a single DER-encoded value.
         * @exception Asn1Exception if an error occurs while decoding an ASN1 encoded data.
         * @exception IOException if an I/O error occurs while reading encoded data.
         */
        private void init(DerValue encoding) throws Asn1Exception, IOException {
        DerValue der, subDer;
                if (((encoding.getTag() & (byte)0x1F) != (byte)0x1C)
                        || (encoding.isApplication() != true)
                        || (encoding.isConstructed() != true))
                        throw new Asn1Exception(Krb5.ASN1_BAD_ID);
                der = encoding.getData().getDerValue();
        if (der.getTag() != DerValue.tag_Sequence)
            throw new Asn1Exception(Krb5.ASN1_BAD_ID);
                subDer = der.getData().getDerValue();
                if ((subDer.getTag() & (byte)0x1F) == (byte)0x00) {
                        userData = subDer.getData().getOctetString();
                }
        else
                        throw new Asn1Exception(Krb5.ASN1_BAD_ID);
                timestamp = KerberosTime.parse(der.getData(), (byte)0x01, true);
                if ((der.getData().peekByte() & 0x1F) == 0x02) {
                        subDer = der.getData().getDerValue();
                        usec = new Integer(subDer.getData().getBigInteger().intValue());
                }
                else usec = null;
                if ((der.getData().peekByte() & 0x1F) == 0x03 ) {
                        subDer = der.getData().getDerValue();
                        seqNumber = new Integer(subDer.getData().getBigInteger().intValue());
                }
                else seqNumber = null;
                sAddress = HostAddress.parse(der.getData(), (byte)0x04, false);
                if (der.getData().available() > 0) {
                        rAddress = HostAddress.parse(der.getData(), (byte)0x05, true);
                }
                if (der.getData().available() > 0)
                        throw new Asn1Exception(Krb5.ASN1_BAD_ID);
        }

       /**
        * Encodes an EncKrbPrivPart object.
        * @return byte array of encoded EncKrbPrivPart 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 temp = new DerOutputStream();
        DerOutputStream bytes = 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) {
            bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x05), rAddress.asn1Encode());
                }
                temp = new DerOutputStream();
                temp.write(DerValue.tag_Sequence, bytes);
                bytes = new DerOutputStream();
                bytes.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte)0x1C), temp);
                return bytes.toByteArray();
        }
}