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/*
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 *  (C) Copyright IBM Corp. 1999 All Rights Reserved.
 *  Copyright 1997 The Open Group Research Institute.  All rights reserved.
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package sun.security.krb5.internal;

import sun.security.krb5.EncryptedData;
import sun.security.krb5.Asn1Exception;
import sun.security.krb5.RealmException;
import sun.security.util.*;
import java.util.Vector;
import java.io.IOException;
import java.math.BigInteger;

Implements the ASN.1 Authenticator type.

KRB-CRED     ::= [APPLICATION 22] SEQUENCE {
     pvno            [0] INTEGER (5),
     msg-type        [1] INTEGER (22),
     tickets         [2] SEQUENCE OF Ticket,
     enc-part        [3] EncryptedData -- EncKrbCredPart
 }

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

/** * Implements the ASN.1 Authenticator type. * * <pre>{@code * KRB-CRED ::= [APPLICATION 22] SEQUENCE { * pvno [0] INTEGER (5), * msg-type [1] INTEGER (22), * tickets [2] SEQUENCE OF Ticket, * enc-part [3] EncryptedData -- EncKrbCredPart * } * }</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 KRBCred { public Ticket[] tickets = null; public EncryptedData encPart; private int pvno; private int msgType; public KRBCred(Ticket[] new_tickets, EncryptedData new_encPart) throws IOException { pvno = Krb5.PVNO; msgType = Krb5.KRB_CRED; if (new_tickets != null) { tickets = new Ticket[new_tickets.length]; for (int i = 0; i < new_tickets.length; i++) { if (new_tickets[i] == null) { throw new IOException("Cannot create a KRBCred"); } else { tickets[i] = (Ticket) new_tickets[i].clone(); } } } encPart = new_encPart; } public KRBCred(byte[] data) throws Asn1Exception, RealmException, KrbApErrException, IOException { init(new DerValue(data)); } public KRBCred(DerValue encoding) throws Asn1Exception, RealmException, KrbApErrException, IOException { init(encoding); }
Initializes an KRBCred 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.
  • KrbApErrException – if the value read from the DER-encoded data stream does not match the pre-defined value.
  • RealmException – if an error occurs while parsing a Realm object.
/** * Initializes an KRBCred 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 KrbApErrException if the value read from the DER-encoded data * stream does not match the pre-defined value. * @exception RealmException if an error occurs while parsing a Realm object. */
private void init(DerValue encoding) throws Asn1Exception, RealmException, KrbApErrException, IOException { if (((encoding.getTag() & (byte) 0x1F) != (byte) 0x16) || (encoding.isApplication() != true) || (encoding.isConstructed() != true)) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } DerValue der, subDer; der = encoding.getData().getDerValue(); if (der.getTag() != DerValue.tag_Sequence) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } subDer = der.getData().getDerValue(); if ((subDer.getTag() & 0x1F) == 0x00) { pvno = subDer.getData().getBigInteger().intValue(); if (pvno != Krb5.PVNO) { throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); } } else { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } subDer = der.getData().getDerValue(); if ((subDer.getTag() & 0x1F) == 0x01) { msgType = subDer.getData().getBigInteger().intValue(); if (msgType != Krb5.KRB_CRED) { throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); } } else { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } subDer = der.getData().getDerValue(); if ((subDer.getTag() & 0x1F) == 0x02) { DerValue subsubDer = subDer.getData().getDerValue(); if (subsubDer.getTag() != DerValue.tag_SequenceOf) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } Vector<Ticket> v = new Vector<>(); while (subsubDer.getData().available() > 0) { v.addElement(new Ticket(subsubDer.getData().getDerValue())); } if (v.size() > 0) { tickets = new Ticket[v.size()]; v.copyInto(tickets); } } else { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } encPart = EncryptedData.parse(der.getData(), (byte) 0x03, false); if (der.getData().available() > 0) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } }
Encodes an KRBCred 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 data of encoded EncAPRepPart object.
/** * Encodes an KRBCred object. * @return the data 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 { DerOutputStream temp, bytes, out; temp = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(pvno)); out = new DerOutputStream(); out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), temp); temp = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(msgType)); out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), temp); temp = new DerOutputStream(); for (int i = 0; i < tickets.length; i++) { temp.write(tickets[i].asn1Encode()); } bytes = new DerOutputStream(); bytes.write(DerValue.tag_SequenceOf, temp); out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x02), bytes); out.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x03), encPart.asn1Encode()); bytes = new DerOutputStream(); bytes.write(DerValue.tag_Sequence, out); out = new DerOutputStream(); out.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte) 0x16), bytes); return out.toByteArray(); } }