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

Implements the ASN.1 EncAPRepPart type. EncAPRepPart ::= [APPLICATION 27] SEQUENCE { ctime [0] KerberosTime, cusec [1] Microseconds, subkey [2] EncryptionKey OPTIONAL, seq-number [3] UInt32 OPTIONAL }

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

/** * Implements the ASN.1 EncAPRepPart type. * * <xmp> * EncAPRepPart ::= [APPLICATION 27] SEQUENCE { * ctime [0] KerberosTime, * cusec [1] Microseconds, * subkey [2] EncryptionKey OPTIONAL, * seq-number [3] UInt32 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 EncAPRepPart { public KerberosTime ctime; public int cusec; EncryptionKey subKey; //optional Integer seqNumber; //optional public EncAPRepPart( KerberosTime new_ctime, int new_cusec, EncryptionKey new_subKey, Integer new_seqNumber) { ctime = new_ctime; cusec = new_cusec; subKey = new_subKey; seqNumber = new_seqNumber; } public EncAPRepPart(byte[] data) throws Asn1Exception, IOException { init(new DerValue(data)); } public EncAPRepPart(DerValue encoding) throws Asn1Exception, IOException { init(encoding); }
Initializes an EncaPRepPart object.
Params:
  • encoding – a single DER-encoded value.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
/** * Initializes an EncaPRepPart 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) 0x1B) || (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); } ctime = KerberosTime.parse(der.getData(), (byte) 0x00, true); subDer = der.getData().getDerValue(); if ((subDer.getTag() & (byte) 0x1F) == (byte) 0x01) { cusec = subDer.getData().getBigInteger().intValue(); } else { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } if (der.getData().available() > 0) { subKey = EncryptionKey.parse(der.getData(), (byte) 0x02, true); } else { subKey = null; seqNumber = null; } if (der.getData().available() > 0) { subDer = der.getData().getDerValue(); if ((subDer.getTag() & 0x1F) != 0x03) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } seqNumber = new Integer(subDer.getData().getBigInteger().intValue()); } else { seqNumber = null; } if (der.getData().available() > 0) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } }
Encodes an EncAPRepPart 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:byte array of encoded EncAPRepPart object.
/** * Encodes an EncAPRepPart object. * @return byte array of encoded EncAPRepPart 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 { Vector<DerValue> v = new Vector<>(); DerOutputStream temp = new DerOutputStream(); v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), ctime.asn1Encode())); temp.putInteger(BigInteger.valueOf(cusec)); v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), temp.toByteArray())); if (subKey != null) { v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x02), subKey.asn1Encode())); } if (seqNumber != null) { temp = new DerOutputStream(); // encode as an unsigned integer (UInt32) temp.putInteger(BigInteger.valueOf(seqNumber.longValue())); v.addElement(new DerValue(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x03), temp.toByteArray())); } DerValue der[] = new DerValue[v.size()]; v.copyInto(der); temp = new DerOutputStream(); temp.putSequence(der); DerOutputStream out = new DerOutputStream(); out.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte) 0x1B), temp); return out.toByteArray(); } public final EncryptionKey getSubKey() { return subKey; } public final Integer getSeqNumber() { return seqNumber; } }