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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.Asn1Exception;
import sun.security.krb5.internal.util.KerberosFlags;
import sun.security.util.*;
import java.io.IOException;

Implements the ASN.1 APOptions type.

APOptions    ::= KerberosFlags
     -- reserved(0),
     -- use-session-key(1),
     -- mutual-required(2)
KerberosFlags   ::= BIT STRING (SIZE (32..MAX))
             -- minimum number of bits shall be sent,
             -- but no fewer than 32

This definition reflects the Network Working Group RFC4120 specification available at http://www.ietf.org/rfc/rfc4120.txt.

/** * Implements the ASN.1 APOptions type. * * <pre>{@code * APOptions ::= KerberosFlags * -- reserved(0), * -- use-session-key(1), * -- mutual-required(2) * * KerberosFlags ::= BIT STRING (SIZE (32..MAX)) * -- minimum number of bits shall be sent, * -- but no fewer than 32 * * }</pre> * <p> * This definition reflects the Network Working Group RFC4120 * specification available at * <a href="http://www.ietf.org/rfc/rfc4120.txt"> * http://www.ietf.org/rfc/rfc4120.txt</a>. */
public class APOptions extends KerberosFlags { public APOptions() { super(Krb5.AP_OPTS_MAX + 1); } public APOptions(int oneBit) throws Asn1Exception { super(Krb5.AP_OPTS_MAX + 1); set(oneBit, true); } public APOptions(int size, byte[] data) throws Asn1Exception { super(size, data); if ((size > data.length * BITS_PER_UNIT) || (size > Krb5.AP_OPTS_MAX + 1)) { throw new Asn1Exception(Krb5.BITSTRING_BAD_LENGTH); } } public APOptions(boolean[] data) throws Asn1Exception { super(data); if (data.length > Krb5.AP_OPTS_MAX + 1) { throw new Asn1Exception(Krb5.BITSTRING_BAD_LENGTH); } } public APOptions(DerValue encoding) throws IOException, Asn1Exception { this(encoding.getUnalignedBitString(true).toBooleanArray()); }
Parse (unmarshal) an APOptions 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 – indicate if this data field is optional.
Throws:
  • Asn1Exception – if an error occurs while decoding an ASN1 encoded data.
  • IOException – if an I/O error occurs while reading encoded data.
Returns:an instance of APOptions.
/** * Parse (unmarshal) an APOptions 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. * * @param data the Der input stream value, which contains one or more marshaled value. * @param explicitTag tag number. * @param optional indicate if this data field is optional. * @return an instance of APOptions. * @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 static APOptions 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 APOptions(subDer); } } }