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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.util;

import java.io.IOException;
import java.util.Arrays;
import sun.security.krb5.internal.Krb5;
import sun.security.util.BitArray;
import sun.security.util.DerOutputStream;

A wrapper class around sun.security.util.BitArray, so that KDCOptions, TicketFlags and ApOptions in krb5 classes can utilize some functions in BitArray classes. The data type is defined in RFC 4120 as: 5.2.8. KerberosFlags For several message types, a specific constrained bit string type, KerberosFlags, is used. KerberosFlags ::= BIT STRING (SIZE (32..MAX)) -- minimum number of bits shall be sent, -- but no fewer than 32
Author:Yanni Zhang
/** * A wrapper class around sun.security.util.BitArray, so that KDCOptions, * TicketFlags and ApOptions in krb5 classes can utilize some functions * in BitArray classes. * * The data type is defined in RFC 4120 as: * * 5.2.8. KerberosFlags * * For several message types, a specific constrained bit string type, * KerberosFlags, is used. * * KerberosFlags ::= BIT STRING (SIZE (32..MAX)) * -- minimum number of bits shall be sent, * -- but no fewer than 32 * * @author Yanni Zhang */
public class KerberosFlags { BitArray bits; // This constant is used by child classes. protected static final int BITS_PER_UNIT = 8; public KerberosFlags(int length) throws IllegalArgumentException { bits = new BitArray(length); } public KerberosFlags(int length, byte[] a) throws IllegalArgumentException { bits = new BitArray(length, a); if (length != Krb5.KRB_FLAGS_MAX+1) { bits = new BitArray(Arrays.copyOf(bits.toBooleanArray(), Krb5.KRB_FLAGS_MAX+1)); } } public KerberosFlags(boolean[] bools) { bits = new BitArray((bools.length==Krb5.KRB_FLAGS_MAX+1)? bools: Arrays.copyOf(bools, Krb5.KRB_FLAGS_MAX+1)); } public void set(int index, boolean value) { bits.set(index, value); } public boolean get(int index) { return bits.get(index); } public boolean[] toBooleanArray() { return bits.toBooleanArray(); }
Writes the encoded data.
Throws:
  • IOException – if an I/O error occurs while reading encoded data.
Returns:an byte array of encoded KDCOptions.
/** * Writes the encoded data. * * @exception IOException if an I/O error occurs while reading encoded data. * @return an byte array of encoded KDCOptions. */
public byte[] asn1Encode() throws IOException { DerOutputStream out = new DerOutputStream(); out.putUnalignedBitString(bits); return out.toByteArray(); } public String toString() { return bits.toString(); } }