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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.io.IOException;
import java.math.BigInteger;

Implements the ASN.1 AP-REQ type.

AP-REQ               ::= [APPLICATION 14] SEQUENCE {
     pvno            [0] INTEGER (5),
     msg-type        [1] INTEGER (14),
     ap-options      [2] APOptions,
     ticket          [3] Ticket,
     authenticator   [4] EncryptedData -- Authenticator
 }

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

/** * Implements the ASN.1 AP-REQ type. * * <pre>{@code * AP-REQ ::= [APPLICATION 14] SEQUENCE { * pvno [0] INTEGER (5), * msg-type [1] INTEGER (14), * ap-options [2] APOptions, * ticket [3] Ticket, * authenticator [4] EncryptedData -- Authenticator * } * }</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 APReq { public int pvno; public int msgType; public APOptions apOptions; public Ticket ticket; public EncryptedData authenticator; public APReq( APOptions new_apOptions, Ticket new_ticket, EncryptedData new_authenticator) { pvno = Krb5.PVNO; msgType = Krb5.KRB_AP_REQ; apOptions = new_apOptions; ticket = new_ticket; authenticator = new_authenticator; } public APReq(byte[] data) throws Asn1Exception, IOException, KrbApErrException, RealmException { init(new DerValue(data)); } public APReq(DerValue encoding) throws Asn1Exception, IOException, KrbApErrException, RealmException { init(encoding); }
Initializes an APReq 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 APReq 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, IOException, KrbApErrException, RealmException { DerValue der, subDer; if (((encoding.getTag() & (byte) 0x1F) != Krb5.KRB_AP_REQ) || (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); } subDer = der.getData().getDerValue(); if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x00) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } pvno = subDer.getData().getBigInteger().intValue(); if (pvno != Krb5.PVNO) { throw new KrbApErrException(Krb5.KRB_AP_ERR_BADVERSION); } subDer = der.getData().getDerValue(); if ((subDer.getTag() & (byte) 0x1F) != (byte) 0x01) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } msgType = subDer.getData().getBigInteger().intValue(); if (msgType != Krb5.KRB_AP_REQ) { throw new KrbApErrException(Krb5.KRB_AP_ERR_MSG_TYPE); } apOptions = APOptions.parse(der.getData(), (byte) 0x02, false); ticket = Ticket.parse(der.getData(), (byte) 0x03, false); authenticator = EncryptedData.parse(der.getData(), (byte) 0x04, false); if (der.getData().available() > 0) { throw new Asn1Exception(Krb5.ASN1_BAD_ID); } }
Encodes an APReq 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 APReq object.
/** * Encodes an APReq object. * @return byte array of encoded APReq 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(); DerOutputStream temp = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(pvno)); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x00), temp); temp = new DerOutputStream(); temp.putInteger(BigInteger.valueOf(msgType)); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x01), temp); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x02), apOptions.asn1Encode()); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x03), ticket.asn1Encode()); bytes.write(DerValue.createTag(DerValue.TAG_CONTEXT, true, (byte) 0x04), authenticator.asn1Encode()); temp = new DerOutputStream(); temp.write(DerValue.tag_Sequence, bytes); DerOutputStream apreq = new DerOutputStream(); apreq.write(DerValue.createTag(DerValue.TAG_APPLICATION, true, (byte) 0x0E), temp); return apreq.toByteArray(); } }