jdk/src/share/classes/sun/security/krb5/internal/EncKrbCredPart.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 sun.security.krb5.RealmException;
import java.util.Vector;
import java.io.IOException;
import java.math.BigInteger;
/**
 * Implements the ASN.1 EncKrbCredPart type.
 *
 * <xmp>
 * EncKrbCredPart  ::= [APPLICATION 29] SEQUENCE {
 *         ticket-info     [0] SEQUENCE OF KrbCredInfo,
 *         nonce           [1] UInt32 OPTIONAL,
 *         timestamp       [2] KerberosTime OPTIONAL,
 *         usec            [3] Microseconds OPTIONAL,
 *         s-address       [4] HostAddress OPTIONAL,
 *         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 EncKrbCredPart {
        public KrbCredInfo[] ticketInfo = null;
        public KerberosTime timeStamp; //optional

        private Integer nonce; //optional
        private Integer usec; //optional
        private HostAddress sAddress; //optional
        private HostAddresses rAddress; //optional

        public EncKrbCredPart(
                KrbCredInfo[] new_ticketInfo,
                KerberosTime new_timeStamp,
                Integer new_usec,
                Integer new_nonce,
                HostAddress new_sAddress,
                HostAddresses new_rAddress
        ) throws IOException {
                if (new_ticketInfo != null) {
                   ticketInfo = new KrbCredInfo[new_ticketInfo.length];
                   for (int i = 0; i < new_ticketInfo.length; i++) {
                        if (new_ticketInfo[i] == null) {
                           throw new IOException("Cannot create a EncKrbCredPart");
                        } else {
                           ticketInfo[i] = (KrbCredInfo)new_ticketInfo[i].clone();
                        }
                   }
                }
                timeStamp = new_timeStamp;
                usec = new_usec;
                nonce = new_nonce;
                sAddress = new_sAddress;
                rAddress = new_rAddress;
        }

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

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

        /**
         * Initializes an EncKrbCredPart 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.
         * @exception RealmException if an error occurs while parsing a Realm object.
         */
        private void init(DerValue encoding) throws Asn1Exception,
                IOException, RealmException {
                DerValue der, subDer;
                        //may not be the correct error code for a tag
                        //mismatch on an encrypted structure
                nonce = null;
                timeStamp = null;
                usec= null;
        sAddress = null;
        rAddress = null;
        if (((encoding.getTag() & (byte)0x1F) != (byte)0x1D)
             || (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) {
           DerValue derValues[] = subDer.getData().getSequence(1);
                   ticketInfo = new KrbCredInfo[derValues.length];
                   for (int i = 0; i < derValues.length; i++) {
                           ticketInfo[i] = new KrbCredInfo(derValues[i]);
                   }
                }
        else
                        throw new Asn1Exception(Krb5.ASN1_BAD_ID);
                if (der.getData().available() > 0) {
                        if (((byte)(der.getData().peekByte()) & (byte)0x1F) == (byte)0x01) {
                                subDer = der.getData().getDerValue();
                                nonce = new Integer(subDer.getData().getBigInteger().intValue());
                        }
                }
                if (der.getData().available() >0) {
                        timeStamp = KerberosTime.parse(der.getData(), (byte)0x02, true);
                }
        if (der.getData().available() >0) {
                        if (((byte)(der.getData().peekByte()) & (byte)0x1F) == (byte)0x03) {
                                subDer = der.getData().getDerValue();
                                usec = new Integer(subDer.getData().getBigInteger().intValue());
                        }
                }
        if (der.getData().available() >0) {
                        sAddress = HostAddress.parse(der.getData(), (byte)0x04, true);
                }
        if (der.getData().available() >0) {
                        rAddress = HostAddresses.parse(der.getData(), (byte)0x05, true);
                }
        if (der.getData().available() >0)
                        throw new Asn1Exception(Krb5.ASN1_BAD_ID);
        }

       /**
        * Encodes an EncKrbCredPart object.
        * @return byte array of encoded EncKrbCredPart 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();
                DerValue[] tickets = new DerValue[ticketInfo.length];
                for (int i = 0; i < ticketInfo.length; i++)
                        tickets[i] = new DerValue(ticketInfo[i].asn1Encode());
                temp.putSequence(tickets);
                bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x00), temp);

                if (nonce != null) {
            temp = new DerOutputStream();
                        temp.putInteger(BigInteger.valueOf(nonce.intValue()));
                        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x01), temp);
                }
        if (timeStamp != null) {
                        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x02), timeStamp.asn1Encode());
                }
                if (usec != null) {
                        temp = new DerOutputStream();
                        temp.putInteger(BigInteger.valueOf(usec.intValue()));
                        bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte)0x03), temp);
                }
                if (sAddress != null) {
                        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)0x1D), temp);
                return bytes.toByteArray();
        }
}