/* * 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.Config;import sun.security.krb5.KrbException;import sun.security.krb5.Asn1Exception;import sun.security.krb5.internal.util.KerberosFlags;import sun.security.util.*;import java.io.IOException; /** * Implements the ASN.1 KDCOptions type. * * <xmp> * KDCOptions   ::= KerberosFlags *      -- reserved(0), *      -- forwardable(1), *      -- forwarded(2), *      -- proxiable(3), *      -- proxy(4), *      -- allow-postdate(5), *      -- postdated(6), *      -- unused7(7), *      -- renewable(8), *      -- unused9(9), *      -- unused10(10), *      -- opt-hardware-auth(11), *      -- unused12(12), *      -- unused13(13), * -- 15 is reserved for canonicalize *      -- unused15(15), * -- 26 was unused in 1510 *      -- disable-transited-check(26), *      -- renewable-ok(27), *      -- enc-tkt-in-skey(28), *      -- renew(30), *      -- validate(31) * * KerberosFlags   ::= BIT STRING (SIZE (32..MAX)) *                      -- minimum number of bits shall be sent, *                      -- but no fewer than 32 * * </xmp> * * <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>. * * <p> * This class appears as data field in the initial request(KRB_AS_REQ) * or subsequent request(KRB_TGS_REQ) to the KDC and indicates the flags * that the client wants to set on the tickets. * * The optional bits are: * <UL> *  <LI>KDCOptions.RESERVED *  <LI>KDCOptions.FORWARDABLE *  <LI>KDCOptions.FORWARDED *  <LI>KDCOptions.PROXIABLE *  <LI>KDCOptions.PROXY *  <LI>KDCOptions.ALLOW_POSTDATE *  <LI>KDCOptions.POSTDATED *  <LI>KDCOptions.RENEWABLE *  <LI>KDCOptions.RENEWABLE_OK *  <LI>KDCOptions.ENC_TKT_IN_SKEY *  <LI>KDCOptions.RENEW *  <LI>KDCOptions.VALIDATE *  </UL> * <p> Various checks must be made before honoring an option. The restrictions * on the use of some options are as follows: * <ol> * <li> FORWARDABLE, FORWARDED, PROXIABLE, RENEWABLE options may be set in * subsequent request only if the ticket_granting ticket on which it is based has * the same options (FORWARDABLE, FORWARDED, PROXIABLE, RENEWABLE) set. * <li> ALLOW_POSTDATE may be set in subsequent request only if the * ticket-granting ticket on which it is based also has its MAY_POSTDATE flag set. * <li> POSTDATED may be set in subsequent request only if the * ticket-granting ticket on which it is based also has its MAY_POSTDATE flag set. * <li> RENEWABLE or RENEW may be set in subsequent request only if the * ticket-granting ticket on which it is based also has its RENEWABLE flag set. * <li> POXY may be set in subsequent request only if the ticket-granting ticket * on which it is based also has its PROXIABLE flag set, and the address(es) of * the host from which the resulting ticket is to be valid should be included * in the addresses field of the request. * <li>FORWARDED, PROXY, ENC_TKT_IN_SKEY, RENEW, VALIDATE are used only in * subsequent requests. * </ol><p> */ public class KDCOptions extends KerberosFlags {     public final int KDC_OPT_PROXIABLE = 0x10000000;    public final int KDC_OPT_RENEWABLE_OK = 0x00000010;    public final int KDC_OPT_FORWARDABLE = 0x40000000;      // KDC Options     public static final int RESERVED        = 0;    public static final int FORWARDABLE     = 1;    public static final int FORWARDED       = 2;    public static final int PROXIABLE       = 3;    public static final int PROXY           = 4;    public static final int ALLOW_POSTDATE  = 5;    public static final int POSTDATED       = 6;    public static final int UNUSED7         = 7;    public static final int RENEWABLE       = 8;    public static final int UNUSED9         = 9;    public static final int UNUSED10        = 10;    public static final int UNUSED11        = 11;    public static final int RENEWABLE_OK    = 27;    public static final int ENC_TKT_IN_SKEY = 28;    public static final int RENEW           = 30;    public static final int VALIDATE        = 31;     private boolean DEBUG = Krb5.DEBUG;     public KDCOptions() {        super(Krb5.KDC_OPTS_MAX + 1);        setDefault();    }     public KDCOptions(int size, byte[] data) throws Asn1Exception {        super(size, data);        if ((size > data.length * BITS_PER_UNIT) || (size > Krb5.KDC_OPTS_MAX + 1))            throw new Asn1Exception(Krb5.BITSTRING_BAD_LENGTH);    }     /**     * Constructs a KDCOptions from the specified bit settings.     *     * @param data the bits to be set for the KDCOptions.     * @exception Asn1Exception if an error occurs while decoding an ASN1     * encoded data.     *     */    public KDCOptions(boolean[] data) throws Asn1Exception {        super(data);        if (data.length > Krb5.KDC_OPTS_MAX + 1) {            throw new Asn1Exception(Krb5.BITSTRING_BAD_LENGTH);        }    }     public KDCOptions(DerValue encoding) throws Asn1Exception, IOException {        this(encoding.getUnalignedBitString(true).toBooleanArray());    }     /**     * Constructs a KDCOptions from the passed bit settings.     *     * @param options the bits to be set for the KDCOptions.     *     */    public KDCOptions(byte[] options) {        super(options.length * BITS_PER_UNIT, options);    }     /**     * Parse (unmarshal) a KDCOptions 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 KDCOptions.     * @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 KDCOptions 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 KDCOptions(subDer);        }    }     /**     * Sets the value(true/false) for one of the <code>KDCOptions</code>.     *     * @param option an option bit.     * @param value true if the option is selected, false if the option is not selected.     * @exception ArrayIndexOutOfBoundsException if array index out of bound occurs.     * @see sun.security.krb5.internal.Krb5     */    public void set(int option, boolean value) throws ArrayIndexOutOfBoundsException {        super.set(option, value);    }     /**     * Gets the value(true/false) for one of the <code>KDCOptions</code>.     *     * @param option an option bit.     * @return value true if the option is selected, false if the option is not selected.     * @exception ArrayIndexOutOfBoundsException if array index out of bound occurs.     * @see sun.security.krb5.internal.Krb5     */     public boolean get(int option) throws ArrayIndexOutOfBoundsException {        return super.get(option);    }      private void setDefault() {        try {             Config config = Config.getInstance();             /*             * First see if the IBM hex format is being used.             * If not, try the Sun's string (boolean) format.             */             int options =config.getDefaultIntValue("kdc_default_options",                    "libdefaults");             if ((options & RENEWABLE_OK) == RENEWABLE_OK) {                set(RENEWABLE_OK, true);            } else {                if (config.getDefaultBooleanValue("renewable", "libdefaults")) {                    set(RENEWABLE_OK, true);                }            }            if ((options & PROXIABLE) == PROXIABLE) {                set(PROXIABLE, true);            } else {                if (config.getDefaultBooleanValue("proxiable", "libdefaults")) {                    set(PROXIABLE, true);                }            }             if ((options & FORWARDABLE) == FORWARDABLE) {                set(FORWARDABLE, true);            } else {                if (config.getDefaultBooleanValue("forwardable", "libdefaults")) {                    set(FORWARDABLE, true);                }            }        } catch (KrbException e) {            if (DEBUG) {                System.out.println("Exception in getting default values for " +                        "KDC Options from the configuration ");                e.printStackTrace();             }        }    }}