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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * 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
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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;

import sun.security.krb5.internal.*;
import sun.security.krb5.internal.crypto.KeyUsage;
import sun.security.util.*;
import java.io.IOException;

This class encapsulates a KRB-AP-REP sent from the service to the client.
/** * This class encapsulates a KRB-AP-REP sent from the service to the * client. */
public class KrbApRep { private byte[] obuf; private byte[] ibuf; private EncAPRepPart encPart; // although in plain text private APRep apRepMessg;
Constructs a KRB-AP-REP to send to a client.
Throws:
/** * Constructs a KRB-AP-REP to send to a client. * @throws KrbException * @throws IOException */
// Used in AcceptSecContextToken public KrbApRep(KrbApReq incomingReq, boolean useSeqNumber, EncryptionKey subKey) throws KrbException, IOException { SeqNumber seqNum = new LocalSeqNumber(); init(incomingReq, subKey, seqNum); }
Constructs a KRB-AP-REQ from the bytes received from a service.
Throws:
/** * Constructs a KRB-AP-REQ from the bytes received from a service. * @throws KrbException * @throws IOException */
// Used in AcceptSecContextToken public KrbApRep(byte[] message, Credentials tgtCreds, KrbApReq outgoingReq) throws KrbException, IOException { this(message, tgtCreds); authenticate(outgoingReq); } private void init(KrbApReq apReq, EncryptionKey subKey, SeqNumber seqNumber) throws KrbException, IOException { createMessage( apReq.getCreds().key, apReq.getCtime(), apReq.cusec(), subKey, seqNumber); obuf = apRepMessg.asn1Encode(); }
Constructs a KrbApRep object.
Params:
  • msg – a byte array of reply message.
  • tgs_creds – client's credential.
Throws:
/** * Constructs a KrbApRep object. * @param msg a byte array of reply message. * @param tgs_creds client's credential. * @exception KrbException * @exception IOException */
private KrbApRep(byte[] msg, Credentials tgs_creds) throws KrbException, IOException { this(new DerValue(msg), tgs_creds); }
Constructs a KrbApRep object.
Params:
  • msg – a byte array of reply message.
  • tgs_creds – client's credential.
Throws:
/** * Constructs a KrbApRep object. * @param msg a byte array of reply message. * @param tgs_creds client's credential. * @exception KrbException * @exception IOException */
private KrbApRep(DerValue encoding, Credentials tgs_creds) throws KrbException, IOException { APRep rep = null; try { rep = new APRep(encoding); } catch (Asn1Exception e) { rep = null; KRBError err = new KRBError(encoding); String errStr = err.getErrorString(); String eText; if (errStr.charAt(errStr.length() - 1) == 0) eText = errStr.substring(0, errStr.length() - 1); else eText = errStr; KrbException ke = new KrbException(err.getErrorCode(), eText); ke.initCause(e); throw ke; } byte[] temp = rep.encPart.decrypt(tgs_creds.key, KeyUsage.KU_ENC_AP_REP_PART); byte[] enc_ap_rep_part = rep.encPart.reset(temp); encoding = new DerValue(enc_ap_rep_part); encPart = new EncAPRepPart(encoding); } private void authenticate(KrbApReq apReq) throws KrbException, IOException { if (encPart.ctime.getSeconds() != apReq.getCtime().getSeconds() || encPart.cusec != apReq.getCtime().getMicroSeconds()) throw new KrbApErrException(Krb5.KRB_AP_ERR_MUT_FAIL); }
Returns the optional subkey stored in this message. Returns null if none is stored.
/** * Returns the optional subkey stored in * this message. Returns null if none is stored. */
public EncryptionKey getSubKey() { // XXX Can encPart be null return encPart.getSubKey(); }
Returns the optional sequence number stored in the this message. Returns null if none is stored.
/** * Returns the optional sequence number stored in the * this message. Returns null if none is stored. */
public Integer getSeqNumber() { // XXX Can encPart be null return encPart.getSeqNumber(); }
Returns the ASN.1 encoding that should be sent to the peer.
/** * Returns the ASN.1 encoding that should be sent to the peer. */
public byte[] getMessage() { return obuf; } private void createMessage( EncryptionKey key, KerberosTime ctime, int cusec, EncryptionKey subKey, SeqNumber seqNumber) throws Asn1Exception, IOException, KdcErrException, KrbCryptoException { Integer seqno = null; if (seqNumber != null) seqno = new Integer(seqNumber.current()); encPart = new EncAPRepPart(ctime, cusec, subKey, seqno); byte[] encPartEncoding = encPart.asn1Encode(); EncryptedData encEncPart = new EncryptedData(key, encPartEncoding, KeyUsage.KU_ENC_AP_REP_PART); apRepMessg = new APRep(encEncPart); } }