/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * 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 * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * *  (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 */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.     *     * @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();    }}