/*
* 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;
/**
* Implements the ASN.1 LastReq type.
*
* <xmp>
* LastReq ::= SEQUENCE OF SEQUENCE {
* lr-type [0] Int32,
* lr-value [1] KerberosTime
* }
* </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 LastReq {
private LastReqEntry[] entry = null;
public LastReq(LastReqEntry[] entries) throws IOException {
if (entries != null) {
entry = new LastReqEntry[entries.length];
for (int i = 0; i < entries.length; i++) {
if (entries[i] == null) {
throw new IOException("Cannot create a LastReqEntry");
} else {
entry[i] = (LastReqEntry)entries[i].clone();
}
}
}
}
/**
* Constructs a LastReq 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 LastReq(DerValue encoding) throws Asn1Exception, IOException {
Vector<LastReqEntry> v= new Vector<LastReqEntry> ();
if (encoding.getTag() != DerValue.tag_Sequence) {
throw new Asn1Exception(Krb5.ASN1_BAD_ID);
}
while (encoding.getData().available() > 0) {
v.addElement(new LastReqEntry(encoding.getData().getDerValue()));
}
if (v.size() > 0) {
entry = new LastReqEntry[v.size()];
v.copyInto(entry);
}
}
/**
* Encodes an LastReq object.
* @return the byte array of encoded LastReq 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();
if (entry != null && entry.length > 0) {
DerOutputStream temp = new DerOutputStream();
for (int i = 0; i < entry.length; i++)
temp.write(entry[i].asn1Encode());
bytes.write(DerValue.tag_Sequence, temp);
return bytes.toByteArray();
}
return null;
}
/**
* Parse (unmarshal) a last request 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 LastReq.
*
*/
public static LastReq 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 LastReq(subDer);
}
}
}