| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.xalan.internal.utils; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.ListResourceBundle; |
| import java.util.Locale; |
| import java.util.MissingResourceException; |
| import java.util.ResourceBundle; |
| import java.util.Properties; |
| |
| /** |
| * This class is duplicated for each subpackage so keep it in sync. It is |
| * package private and therefore is not exposed as part of any API. |
| * |
| * @xerces.internal |
| */ |
| public final class SecuritySupport { |
| |
| private static final SecuritySupport securitySupport = new SecuritySupport(); |
| |
| /** |
| * Return an instance of this class. |
| */ |
| public static SecuritySupport getInstance() { |
| return securitySupport; |
| } |
| |
| public static ClassLoader getContextClassLoader() { |
| return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| ClassLoader cl = null; |
| try { |
| cl = Thread.currentThread().getContextClassLoader(); |
| } catch (SecurityException ex) { |
| } |
| return cl; |
| } |
| }); |
| } |
| |
| static ClassLoader getSystemClassLoader() { |
| return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| ClassLoader cl = null; |
| try { |
| cl = ClassLoader.getSystemClassLoader(); |
| } catch (SecurityException ex) { |
| } |
| return cl; |
| } |
| }); |
| } |
| |
| static ClassLoader getParentClassLoader(final ClassLoader cl) { |
| return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| ClassLoader parent = null; |
| try { |
| parent = cl.getParent(); |
| } catch (SecurityException ex) { |
| } |
| |
| // eliminate loops in case of the boot |
| // ClassLoader returning itself as a parent |
| return (parent == cl) ? null : parent; |
| } |
| }); |
| } |
| |
| public static String getSystemProperty(final String propName) { |
| return (String) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return System.getProperty(propName); |
| } |
| }); |
| } |
| |
| public static String getSystemProperty(final String propName, final String def) { |
| return (String) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return System.getProperty(propName, def); |
| } |
| }); |
| } |
| |
| static FileInputStream getFileInputStream(final File file) |
| throws FileNotFoundException { |
| try { |
| return (FileInputStream) AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() throws FileNotFoundException { |
| return new FileInputStream(file); |
| } |
| }); |
| } catch (PrivilegedActionException e) { |
| throw (FileNotFoundException)e.getException(); |
| } |
| } |
| |
| public static InputStream getResourceAsStream(final String name) { |
| return (InputStream) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return SecuritySupport.class.getResourceAsStream("/"+name); |
| } |
| }); |
| } |
| |
| /** |
| * Gets a resource bundle using the specified base name, the default locale, and the caller's class loader. |
| * @param bundle the base name of the resource bundle, a fully qualified class name |
| * @return a resource bundle for the given base name and the default locale |
| */ |
| public static ListResourceBundle getResourceBundle(String bundle) { |
| return getResourceBundle(bundle, Locale.getDefault()); |
| } |
| |
| /** |
| * Gets a resource bundle using the specified base name and locale, and the caller's class loader. |
| * @param bundle the base name of the resource bundle, a fully qualified class name |
| * @param locale the locale for which a resource bundle is desired |
| * @return a resource bundle for the given base name and locale |
| */ |
| public static ListResourceBundle getResourceBundle(final String bundle, final Locale locale) { |
| return AccessController.doPrivileged(new PrivilegedAction<ListResourceBundle>() { |
| public ListResourceBundle run() { |
| try { |
| return (ListResourceBundle)ResourceBundle.getBundle(bundle, locale); |
| } catch (MissingResourceException e) { |
| try { |
| return (ListResourceBundle)ResourceBundle.getBundle(bundle, new Locale("en", "US")); |
| } catch (MissingResourceException e2) { |
| throw new MissingResourceException( |
| "Could not load any resource bundle by " + bundle, bundle, ""); |
| } |
| } |
| } |
| }); |
| } |
| |
| public static boolean getFileExists(final File f) { |
| return ((Boolean) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return f.exists() ? Boolean.TRUE : Boolean.FALSE; |
| } |
| })).booleanValue(); |
| } |
| |
| static long getLastModified(final File f) { |
| return ((Long) AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return f.lastModified(); |
| } |
| })).longValue(); |
| } |
| |
| /** |
| * Strip off path from an URI |
| * |
| * @param uri an URI with full path |
| * @return the file name only |
| */ |
| public static String sanitizePath(String uri) { |
| if (uri == null) { |
| return ""; |
| } |
| int i = uri.lastIndexOf("/"); |
| if (i > 0) { |
| return uri.substring(i+1, uri.length()); |
| } |
| return ""; |
| } |
| |
| /** |
| * Check the protocol used in the systemId against allowed protocols |
| * |
| * @param systemId the Id of the URI |
| * @param allowedProtocols a list of allowed protocols separated by comma |
| * @param accessAny keyword to indicate allowing any protocol |
| * @return the name of the protocol if rejected, null otherwise |
| */ |
| public static String checkAccess(String systemId, String allowedProtocols, String accessAny) throws IOException { |
| if (systemId == null || (allowedProtocols != null && |
| allowedProtocols.equalsIgnoreCase(accessAny))) { |
| return null; |
| } |
| |
| String protocol; |
| if (systemId.indexOf(":")==-1) { |
| protocol = "file"; |
| } else { |
| URL url = new URL(systemId); |
| protocol = url.getProtocol(); |
| if (protocol.equalsIgnoreCase("jar")) { |
| String path = url.getPath(); |
| protocol = path.substring(0, path.indexOf(":")); |
| } else if (protocol.equalsIgnoreCase("jrt")) { |
| // if the systemId is "jrt" then allow access if "file" allowed |
| protocol = "file"; |
| } |
| } |
| |
| if (isProtocolAllowed(protocol, allowedProtocols)) { |
| //access allowed |
| return null; |
| } else { |
| return protocol; |
| } |
| } |
| |
| /** |
| * Check if the protocol is in the allowed list of protocols. The check |
| * is case-insensitive while ignoring whitespaces. |
| * |
| * @param protocol a protocol |
| * @param allowedProtocols a list of allowed protocols |
| * @return true if the protocol is in the list |
| */ |
| private static boolean isProtocolAllowed(String protocol, String allowedProtocols) { |
| if (allowedProtocols == null) { |
| return false; |
| } |
| String temp[] = allowedProtocols.split(","); |
| for (String t : temp) { |
| t = t.trim(); |
| if (t.equalsIgnoreCase(protocol)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Read JAXP system property in this order: system property, |
| * $java.home/conf/jaxp.properties if the system property is not specified |
| * |
| * @param propertyId the Id of the property |
| * @return the value of the property |
| */ |
| public static String getJAXPSystemProperty(String sysPropertyId) { |
| String accessExternal = getSystemProperty(sysPropertyId); |
| if (accessExternal == null) { |
| accessExternal = readJAXPProperty(sysPropertyId); |
| } |
| return accessExternal; |
| } |
| |
| /** |
| * Read from $java.home/conf/jaxp.properties for the specified property |
| * The program |
| * |
| * @param propertyId the Id of the property |
| * @return the value of the property |
| */ |
| static String readJAXPProperty(String propertyId) { |
| String value = null; |
| InputStream is = null; |
| try { |
| if (firstTime) { |
| synchronized (cacheProps) { |
| if (firstTime) { |
| String configFile = getSystemProperty("java.home") + File.separator + |
| "conf" + File.separator + "jaxp.properties"; |
| File f = new File(configFile); |
| if (getFileExists(f)) { |
| is = getFileInputStream(f); |
| cacheProps.load(is); |
| } |
| firstTime = false; |
| } |
| } |
| } |
| value = cacheProps.getProperty(propertyId); |
| |
| } |
| catch (Exception ex) {} |
| finally { |
| if (is != null) { |
| try { |
| is.close(); |
| } catch (IOException ex) {} |
| } |
| } |
| |
| return value; |
| } |
| |
| /** |
| * Cache for properties in java.home/conf/jaxp.properties |
| */ |
| static final Properties cacheProps = new Properties(); |
| |
| /** |
| * Flag indicating if the program has tried reading java.home/conf/jaxp.properties |
| */ |
| static volatile boolean firstTime = true; |
| |
| private SecuritySupport () {} |
| } |