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