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/*
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 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.
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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.

LastReq         ::=     SEQUENCE OF SEQUENCE {
        lr-type         [0] Int32,
        lr-value        [1] KerberosTime
 }

This definition reflects the Network Working Group RFC 4120 specification available at http://www.ietf.org/rfc/rfc4120.txt.

/** * Implements the ASN.1 LastReq type. * * <pre>{@code * LastReq ::= SEQUENCE OF SEQUENCE { * lr-type [0] Int32, * lr-value [1] KerberosTime * } * }</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 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.
Params:
  • encoding – a Der-encoded data.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
/** * 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<>(); 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.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
Returns:the byte array of encoded LastReq object.
/** * 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.
Params:
  • data – the Der input stream value, which contains one or more marshaled value.
  • explicitTag – tag number.
  • optional – indicates if this data field is optional
Throws:
  • Asn1Exception – on error.
Returns:an instance of LastReq.
/** * 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); } } }