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

	/**
	* Implements the ASN.1 EncKrbCredPart type.
	*
	* <pre>{@code
	* 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
	* }
	* }</pre>
	*
	* <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();
	}
	}

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