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8187443: Forest Consolidation: Move files to unified layout
Reviewed-by: darcy, ihse
This commit is contained in:
Erik Joelsson
parent
270fe13182
commit
3789983e89
56923 changed files with 3 additions and 15727 deletions
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@ -0,0 +1,555 @@
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/*
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* Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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||||
* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
|
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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*
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* (C) Copyright IBM Corp. 1999 All Rights Reserved.
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* Copyright 1997 The Open Group Research Institute. All rights reserved.
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*/
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package sun.security.krb5;
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import java.security.PrivilegedAction;
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import java.security.Security;
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import java.util.Locale;
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import sun.security.krb5.internal.Krb5;
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import sun.security.krb5.internal.NetClient;
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import java.io.IOException;
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import java.net.SocketTimeoutException;
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import java.util.StringTokenizer;
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import java.security.AccessController;
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import java.security.PrivilegedExceptionAction;
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import java.security.PrivilegedActionException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Set;
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import java.util.HashSet;
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import java.util.Iterator;
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import sun.security.krb5.internal.KRBError;
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/**
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* KDC-REQ/KDC-REP communication. No more base class for KrbAsReq and
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* KrbTgsReq. This class is now communication only.
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*/
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public final class KdcComm {
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// The following settings can be configured in [libdefaults]
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// section of krb5.conf, which are global for all realms. Each of
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// them can also be defined in a realm, which overrides value here.
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/**
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* max retry time for a single KDC, default Krb5.KDC_RETRY_LIMIT (3)
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*/
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private static int defaultKdcRetryLimit;
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/**
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* timeout requesting a ticket from KDC, in millisec, default 30 sec
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*/
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private static int defaultKdcTimeout;
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/**
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* max UDP packet size, default unlimited (-1)
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*/
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private static int defaultUdpPrefLimit;
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private static final boolean DEBUG = Krb5.DEBUG;
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private static final String BAD_POLICY_KEY = "krb5.kdc.bad.policy";
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/**
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* What to do when a KDC is unavailable, specified in the
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* java.security file with key krb5.kdc.bad.policy.
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* Possible values can be TRY_LAST or TRY_LESS. Reloaded when refreshed.
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*/
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private enum BpType {
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NONE, TRY_LAST, TRY_LESS
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}
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private static int tryLessMaxRetries = 1;
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private static int tryLessTimeout = 5000;
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private static BpType badPolicy;
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static {
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initStatic();
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}
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/**
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* Read global settings
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*/
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public static void initStatic() {
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String value = AccessController.doPrivileged(
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new PrivilegedAction<String>() {
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public String run() {
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return Security.getProperty(BAD_POLICY_KEY);
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}
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});
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if (value != null) {
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value = value.toLowerCase(Locale.ENGLISH);
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String[] ss = value.split(":");
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if ("tryless".equals(ss[0])) {
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if (ss.length > 1) {
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String[] params = ss[1].split(",");
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try {
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int tmp0 = Integer.parseInt(params[0]);
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if (params.length > 1) {
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tryLessTimeout = Integer.parseInt(params[1]);
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}
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// Assign here in case of exception at params[1]
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tryLessMaxRetries = tmp0;
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} catch (NumberFormatException nfe) {
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// Ignored. Please note that tryLess is recognized and
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// used, parameters using default values
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if (DEBUG) {
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System.out.println("Invalid " + BAD_POLICY_KEY +
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" parameter for tryLess: " +
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value + ", use default");
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}
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}
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}
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badPolicy = BpType.TRY_LESS;
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} else if ("trylast".equals(ss[0])) {
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badPolicy = BpType.TRY_LAST;
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} else {
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badPolicy = BpType.NONE;
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}
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} else {
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badPolicy = BpType.NONE;
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}
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int timeout = -1;
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int max_retries = -1;
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int udp_pref_limit = -1;
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try {
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Config cfg = Config.getInstance();
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String temp = cfg.get("libdefaults", "kdc_timeout");
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timeout = parseTimeString(temp);
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temp = cfg.get("libdefaults", "max_retries");
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max_retries = parsePositiveIntString(temp);
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temp = cfg.get("libdefaults", "udp_preference_limit");
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udp_pref_limit = parsePositiveIntString(temp);
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} catch (Exception exc) {
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// ignore any exceptions; use default values
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if (DEBUG) {
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System.out.println ("Exception in getting KDC communication " +
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"settings, using default value " +
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exc.getMessage());
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}
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}
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defaultKdcTimeout = timeout > 0 ? timeout : 30*1000; // 30 seconds
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defaultKdcRetryLimit =
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max_retries > 0 ? max_retries : Krb5.KDC_RETRY_LIMIT;
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if (udp_pref_limit < 0) {
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defaultUdpPrefLimit = Krb5.KDC_DEFAULT_UDP_PREF_LIMIT;
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} else if (udp_pref_limit > Krb5.KDC_HARD_UDP_LIMIT) {
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defaultUdpPrefLimit = Krb5.KDC_HARD_UDP_LIMIT;
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} else {
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defaultUdpPrefLimit = udp_pref_limit;
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}
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KdcAccessibility.reset();
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}
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/**
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* The instance fields
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*/
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private String realm;
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public KdcComm(String realm) throws KrbException {
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if (realm == null) {
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realm = Config.getInstance().getDefaultRealm();
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if (realm == null) {
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throw new KrbException(Krb5.KRB_ERR_GENERIC,
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"Cannot find default realm");
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}
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}
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this.realm = realm;
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}
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public byte[] send(byte[] obuf)
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throws IOException, KrbException {
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int udpPrefLimit = getRealmSpecificValue(
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realm, "udp_preference_limit", defaultUdpPrefLimit);
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boolean useTCP = (udpPrefLimit > 0 &&
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(obuf != null && obuf.length > udpPrefLimit));
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return send(obuf, useTCP);
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}
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private byte[] send(byte[] obuf, boolean useTCP)
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throws IOException, KrbException {
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if (obuf == null)
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return null;
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Config cfg = Config.getInstance();
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if (realm == null) {
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realm = cfg.getDefaultRealm();
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if (realm == null) {
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throw new KrbException(Krb5.KRB_ERR_GENERIC,
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"Cannot find default realm");
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}
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}
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String kdcList = cfg.getKDCList(realm);
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if (kdcList == null) {
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throw new KrbException("Cannot get kdc for realm " + realm);
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}
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// tempKdc may include the port number also
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Iterator<String> tempKdc = KdcAccessibility.list(kdcList).iterator();
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if (!tempKdc.hasNext()) {
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throw new KrbException("Cannot get kdc for realm " + realm);
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}
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byte[] ibuf = null;
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try {
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ibuf = sendIfPossible(obuf, tempKdc.next(), useTCP);
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} catch(Exception first) {
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boolean ok = false;
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while(tempKdc.hasNext()) {
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try {
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ibuf = sendIfPossible(obuf, tempKdc.next(), useTCP);
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ok = true;
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break;
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} catch(Exception ignore) {}
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}
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if (!ok) throw first;
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}
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if (ibuf == null) {
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throw new IOException("Cannot get a KDC reply");
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}
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return ibuf;
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}
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// send the AS Request to the specified KDC
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// failover to using TCP if useTCP is not set and response is too big
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private byte[] sendIfPossible(byte[] obuf, String tempKdc, boolean useTCP)
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throws IOException, KrbException {
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try {
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byte[] ibuf = send(obuf, tempKdc, useTCP);
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KRBError ke = null;
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try {
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ke = new KRBError(ibuf);
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} catch (Exception e) {
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// OK
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}
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if (ke != null && ke.getErrorCode() ==
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Krb5.KRB_ERR_RESPONSE_TOO_BIG) {
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ibuf = send(obuf, tempKdc, true);
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}
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KdcAccessibility.removeBad(tempKdc);
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return ibuf;
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} catch(Exception e) {
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if (DEBUG) {
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System.out.println(">>> KrbKdcReq send: error trying " +
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tempKdc);
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e.printStackTrace(System.out);
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}
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KdcAccessibility.addBad(tempKdc);
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throw e;
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}
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}
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// send the AS Request to the specified KDC
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private byte[] send(byte[] obuf, String tempKdc, boolean useTCP)
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throws IOException, KrbException {
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if (obuf == null)
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return null;
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int port = Krb5.KDC_INET_DEFAULT_PORT;
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int retries = getRealmSpecificValue(
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realm, "max_retries", defaultKdcRetryLimit);
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int timeout = getRealmSpecificValue(
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realm, "kdc_timeout", defaultKdcTimeout);
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if (badPolicy == BpType.TRY_LESS &&
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KdcAccessibility.isBad(tempKdc)) {
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if (retries > tryLessMaxRetries) {
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retries = tryLessMaxRetries; // less retries
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}
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if (timeout > tryLessTimeout) {
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timeout = tryLessTimeout; // less time
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}
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}
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String kdc = null;
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String portStr = null;
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if (tempKdc.charAt(0) == '[') { // Explicit IPv6 in []
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int pos = tempKdc.indexOf(']', 1);
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if (pos == -1) {
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throw new IOException("Illegal KDC: " + tempKdc);
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}
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kdc = tempKdc.substring(1, pos);
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if (pos != tempKdc.length() - 1) { // with port number
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if (tempKdc.charAt(pos+1) != ':') {
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throw new IOException("Illegal KDC: " + tempKdc);
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}
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portStr = tempKdc.substring(pos+2);
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}
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} else {
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int colon = tempKdc.indexOf(':');
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if (colon == -1) { // Hostname or IPv4 host only
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kdc = tempKdc;
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} else {
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int nextColon = tempKdc.indexOf(':', colon+1);
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if (nextColon > 0) { // >=2 ":", IPv6 with no port
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kdc = tempKdc;
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} else { // 1 ":", hostname or IPv4 with port
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kdc = tempKdc.substring(0, colon);
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portStr = tempKdc.substring(colon+1);
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}
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}
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}
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if (portStr != null) {
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int tempPort = parsePositiveIntString(portStr);
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if (tempPort > 0)
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port = tempPort;
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}
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|
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if (DEBUG) {
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System.out.println(">>> KrbKdcReq send: kdc=" + kdc
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+ (useTCP ? " TCP:":" UDP:")
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+ port + ", timeout="
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+ timeout
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+ ", number of retries ="
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+ retries
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+ ", #bytes=" + obuf.length);
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}
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|
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KdcCommunication kdcCommunication =
|
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new KdcCommunication(kdc, port, useTCP, timeout, retries, obuf);
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try {
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byte[] ibuf = AccessController.doPrivileged(kdcCommunication);
|
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if (DEBUG) {
|
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System.out.println(">>> KrbKdcReq send: #bytes read="
|
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+ (ibuf != null ? ibuf.length : 0));
|
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}
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return ibuf;
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} catch (PrivilegedActionException e) {
|
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Exception wrappedException = e.getException();
|
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if (wrappedException instanceof IOException) {
|
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throw (IOException) wrappedException;
|
||||
} else {
|
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throw (KrbException) wrappedException;
|
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}
|
||||
}
|
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}
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private static class KdcCommunication
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implements PrivilegedExceptionAction<byte[]> {
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|
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private String kdc;
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private int port;
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private boolean useTCP;
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private int timeout;
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private int retries;
|
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private byte[] obuf;
|
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|
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public KdcCommunication(String kdc, int port, boolean useTCP,
|
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int timeout, int retries, byte[] obuf) {
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this.kdc = kdc;
|
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this.port = port;
|
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this.useTCP = useTCP;
|
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this.timeout = timeout;
|
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this.retries = retries;
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this.obuf = obuf;
|
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}
|
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|
||||
// The caller only casts IOException and KrbException so don't
|
||||
// add any new ones!
|
||||
|
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public byte[] run() throws IOException, KrbException {
|
||||
|
||||
byte[] ibuf = null;
|
||||
|
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for (int i=1; i <= retries; i++) {
|
||||
String proto = useTCP?"TCP":"UDP";
|
||||
if (DEBUG) {
|
||||
System.out.println(">>> KDCCommunication: kdc=" + kdc
|
||||
+ " " + proto + ":"
|
||||
+ port + ", timeout="
|
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+ timeout
|
||||
+ ",Attempt =" + i
|
||||
+ ", #bytes=" + obuf.length);
|
||||
}
|
||||
try (NetClient kdcClient = NetClient.getInstance(
|
||||
proto, kdc, port, timeout)) {
|
||||
kdcClient.send(obuf);
|
||||
ibuf = kdcClient.receive();
|
||||
break;
|
||||
} catch (SocketTimeoutException se) {
|
||||
if (DEBUG) {
|
||||
System.out.println ("SocketTimeOutException with " +
|
||||
"attempt: " + i);
|
||||
}
|
||||
if (i == retries) {
|
||||
ibuf = null;
|
||||
throw se;
|
||||
}
|
||||
}
|
||||
}
|
||||
return ibuf;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Parses a time value string. If it ends with "s", parses as seconds.
|
||||
* Otherwise, parses as milliseconds.
|
||||
* @param s the time string
|
||||
* @return the integer value in milliseconds, or -1 if input is null or
|
||||
* has an invalid format
|
||||
*/
|
||||
private static int parseTimeString(String s) {
|
||||
if (s == null) {
|
||||
return -1;
|
||||
}
|
||||
if (s.endsWith("s")) {
|
||||
int seconds = parsePositiveIntString(s.substring(0, s.length()-1));
|
||||
return (seconds < 0) ? -1 : (seconds*1000);
|
||||
} else {
|
||||
return parsePositiveIntString(s);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns krb5.conf setting of {@code key} for a specific realm,
|
||||
* which can be:
|
||||
* 1. defined in the sub-stanza for the given realm inside [realms], or
|
||||
* 2. defined in [libdefaults], or
|
||||
* 3. defValue
|
||||
* @param realm the given realm in which the setting is requested. Returns
|
||||
* the global setting if null
|
||||
* @param key the key for the setting
|
||||
* @param defValue default value
|
||||
* @return a value for the key
|
||||
*/
|
||||
private int getRealmSpecificValue(String realm, String key, int defValue) {
|
||||
int v = defValue;
|
||||
|
||||
if (realm == null) return v;
|
||||
|
||||
int temp = -1;
|
||||
try {
|
||||
String value =
|
||||
Config.getInstance().get("realms", realm, key);
|
||||
if (key.equals("kdc_timeout")) {
|
||||
temp = parseTimeString(value);
|
||||
} else {
|
||||
temp = parsePositiveIntString(value);
|
||||
}
|
||||
} catch (Exception exc) {
|
||||
// Ignored, defValue will be picked up
|
||||
}
|
||||
|
||||
if (temp > 0) v = temp;
|
||||
|
||||
return v;
|
||||
}
|
||||
|
||||
private static int parsePositiveIntString(String intString) {
|
||||
if (intString == null)
|
||||
return -1;
|
||||
|
||||
int ret = -1;
|
||||
|
||||
try {
|
||||
ret = Integer.parseInt(intString);
|
||||
} catch (Exception exc) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (ret >= 0)
|
||||
return ret;
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Maintains a KDC accessible list. Unavailable KDCs are put into a
|
||||
* blacklist, when a KDC in the blacklist is available, it's removed
|
||||
* from there. No insertion order in the blacklist.
|
||||
*
|
||||
* There are two methods to deal with KDCs in the blacklist. 1. Only try
|
||||
* them when there's no KDC not on the blacklist. 2. Still try them, but
|
||||
* with lesser number of retries and smaller timeout value.
|
||||
*/
|
||||
static class KdcAccessibility {
|
||||
// Known bad KDCs
|
||||
private static Set<String> bads = new HashSet<>();
|
||||
|
||||
private static synchronized void addBad(String kdc) {
|
||||
if (DEBUG) {
|
||||
System.out.println(">>> KdcAccessibility: add " + kdc);
|
||||
}
|
||||
bads.add(kdc);
|
||||
}
|
||||
|
||||
private static synchronized void removeBad(String kdc) {
|
||||
if (DEBUG) {
|
||||
System.out.println(">>> KdcAccessibility: remove " + kdc);
|
||||
}
|
||||
bads.remove(kdc);
|
||||
}
|
||||
|
||||
private static synchronized boolean isBad(String kdc) {
|
||||
return bads.contains(kdc);
|
||||
}
|
||||
|
||||
private static synchronized void reset() {
|
||||
if (DEBUG) {
|
||||
System.out.println(">>> KdcAccessibility: reset");
|
||||
}
|
||||
bads.clear();
|
||||
}
|
||||
|
||||
// Returns a preferred KDC list by putting the bad ones at the end
|
||||
private static synchronized List<String> list(String kdcList) {
|
||||
StringTokenizer st = new StringTokenizer(kdcList);
|
||||
List<String> list = new ArrayList<>();
|
||||
if (badPolicy == BpType.TRY_LAST) {
|
||||
List<String> badkdcs = new ArrayList<>();
|
||||
while (st.hasMoreTokens()) {
|
||||
String t = st.nextToken();
|
||||
if (bads.contains(t)) badkdcs.add(t);
|
||||
else list.add(t);
|
||||
}
|
||||
// Bad KDCs are put at last
|
||||
list.addAll(badkdcs);
|
||||
} else {
|
||||
// All KDCs are returned in their original order,
|
||||
// This include TRY_LESS and NONE
|
||||
while (st.hasMoreTokens()) {
|
||||
list.add(st.nextToken());
|
||||
}
|
||||
}
|
||||
return list;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue