529 lines
19 KiB
Java
529 lines
19 KiB
Java
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/*
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* Copyright (c) 1997, 2011, 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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package java.security;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.List;
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import java.util.Map;
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import java.util.WeakHashMap;
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import sun.misc.JavaSecurityProtectionDomainAccess;
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import static sun.misc.JavaSecurityProtectionDomainAccess.ProtectionDomainCache;
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import sun.misc.SharedSecrets;
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import sun.security.util.Debug;
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import sun.security.util.SecurityConstants;
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import sun.misc.JavaSecurityAccess;
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import sun.misc.SharedSecrets;
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/**
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*
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*<p>
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* This ProtectionDomain class encapsulates the characteristics of a domain,
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* which encloses a set of classes whose instances are granted a set
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* of permissions when being executed on behalf of a given set of Principals.
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* <p>
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* A static set of permissions can be bound to a ProtectionDomain when it is
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* constructed; such permissions are granted to the domain regardless of the
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* Policy in force. However, to support dynamic security policies, a
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* ProtectionDomain can also be constructed such that it is dynamically
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* mapped to a set of permissions by the current Policy whenever a permission
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* is checked.
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* <p>
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*
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* @author Li Gong
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* @author Roland Schemers
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* @author Gary Ellison
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*/
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public class ProtectionDomain {
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static {
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// Set up JavaSecurityAccess in SharedSecrets
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SharedSecrets.setJavaSecurityAccess(
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new JavaSecurityAccess() {
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public <T> T doIntersectionPrivilege(
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PrivilegedAction<T> action,
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final AccessControlContext stack,
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final AccessControlContext context)
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{
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if (action == null) {
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throw new NullPointerException();
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}
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return AccessController.doPrivileged(
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action,
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new AccessControlContext(
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stack.getContext(), context).optimize()
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);
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}
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public <T> T doIntersectionPrivilege(
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PrivilegedAction<T> action,
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AccessControlContext context)
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{
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return doIntersectionPrivilege(action,
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AccessController.getContext(), context);
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}
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}
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);
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}
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/* CodeSource */
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private CodeSource codesource ;
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/* [IKVM] If this is a protection from an Assembly class loader, we lazily construct the codesource, classloader and permissions */
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private cli.System.Reflection.Assembly assembly;
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/* ClassLoader the protection domain was consed from */
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private ClassLoader classloader;
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/* Principals running-as within this protection domain */
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private Principal[] principals;
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/* the rights this protection domain is granted */
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private PermissionCollection permissions;
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/* if the permissions object has AllPermission */
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private boolean hasAllPerm = false;
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/* the PermissionCollection is static (pre 1.4 constructor)
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or dynamic (via a policy refresh) */
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private boolean staticPermissions;
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/*
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* An object used as a key when the ProtectionDomain is stored in a Map.
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*/
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final Key key = new Key();
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/* [IKVM] constructor for use by the runtime (AssemblyClassLoader) */
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ProtectionDomain(cli.System.Reflection.Assembly assembly) {
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this.assembly = assembly;
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this.hasAllPerm = true;
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this.staticPermissions = true;
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this.principals = new Principal[0];
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}
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/* [IKVM] */
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private void lazyInitClassLoader() {
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if (classloader == null && assembly != null) {
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classloader = ikvm.runtime.AssemblyClassLoader.getAssemblyClassLoader(assembly);
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}
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}
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/* [IKVM] */
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private void lazyInitPermissions() {
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if (permissions == null && hasAllPerm) {
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Permissions p = new Permissions();
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p.add(new AllPermission());
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p.setReadOnly();
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// we lock on principals since that is a private object
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synchronized (principals) {
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if (permissions == null) {
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permissions = p;
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}
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}
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}
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}
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/* [IKVM] */
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private void lazyInitCodeSource() {
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if (codesource == null && assembly != null) {
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java.net.URL url;
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try {
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if (false) throw new cli.System.NotSupportedException();
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url = new java.net.URL(assembly.get_EscapedCodeBase());
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} catch (java.net.MalformedURLException _) {
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url = null;
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} catch (cli.System.NotSupportedException _) {
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// dynamic assemblies don't have a codebase
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url = null;
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}
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CodeSource cs = new CodeSource(url, (java.security.cert.Certificate[])null);
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// we lock on principals since that is a private object
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synchronized (principals) {
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if (codesource == null) {
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codesource = cs;
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}
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}
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}
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}
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/**
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* Creates a new ProtectionDomain with the given CodeSource and
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* Permissions. If the permissions object is not null, then
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* <code>setReadOnly())</code> will be called on the passed in
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* Permissions object. The only permissions granted to this domain
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* are the ones specified; the current Policy will not be consulted.
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*
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* @param codesource the codesource associated with this domain
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* @param permissions the permissions granted to this domain
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*/
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public ProtectionDomain(CodeSource codesource,
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PermissionCollection permissions) {
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this.codesource = codesource;
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if (permissions != null) {
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this.permissions = permissions;
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this.permissions.setReadOnly();
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if (permissions instanceof Permissions &&
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((Permissions)permissions).allPermission != null) {
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hasAllPerm = true;
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}
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}
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this.classloader = null;
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this.principals = new Principal[0];
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staticPermissions = true;
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}
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/**
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* Creates a new ProtectionDomain qualified by the given CodeSource,
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* Permissions, ClassLoader and array of Principals. If the
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* permissions object is not null, then <code>setReadOnly()</code>
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* will be called on the passed in Permissions object.
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* The permissions granted to this domain are dynamic; they include
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* both the static permissions passed to this constructor, and any
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* permissions granted to this domain by the current Policy at the
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* time a permission is checked.
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* <p>
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* This constructor is typically used by
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* {@link SecureClassLoader ClassLoaders}
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* and {@link DomainCombiner DomainCombiners} which delegate to
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* <code>Policy</code> to actively associate the permissions granted to
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* this domain. This constructor affords the
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* Policy provider the opportunity to augment the supplied
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* PermissionCollection to reflect policy changes.
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* <p>
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*
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* @param codesource the CodeSource associated with this domain
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* @param permissions the permissions granted to this domain
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* @param classloader the ClassLoader associated with this domain
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* @param principals the array of Principals associated with this
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* domain. The contents of the array are copied to protect against
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* subsequent modification.
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* @see Policy#refresh
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* @see Policy#getPermissions(ProtectionDomain)
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* @since 1.4
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*/
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public ProtectionDomain(CodeSource codesource,
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PermissionCollection permissions,
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ClassLoader classloader,
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Principal[] principals) {
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this.codesource = codesource;
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if (permissions != null) {
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this.permissions = permissions;
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this.permissions.setReadOnly();
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if (permissions instanceof Permissions &&
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((Permissions)permissions).allPermission != null) {
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hasAllPerm = true;
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}
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}
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this.classloader = classloader;
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this.principals = (principals != null ? principals.clone():
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new Principal[0]);
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staticPermissions = false;
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}
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/**
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* Returns the CodeSource of this domain.
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* @return the CodeSource of this domain which may be null.
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* @since 1.2
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*/
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public final CodeSource getCodeSource() {
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lazyInitCodeSource();
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return this.codesource;
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}
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/**
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* Returns the ClassLoader of this domain.
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* @return the ClassLoader of this domain which may be null.
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*
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* @since 1.4
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*/
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public final ClassLoader getClassLoader() {
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lazyInitClassLoader();
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return this.classloader;
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}
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/**
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* Returns an array of principals for this domain.
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* @return a non-null array of principals for this domain.
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* Returns a new array each time this method is called.
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*
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* @since 1.4
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*/
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public final Principal[] getPrincipals() {
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return this.principals.clone();
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}
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/**
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* Returns the static permissions granted to this domain.
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*
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* @return the static set of permissions for this domain which may be null.
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* @see Policy#refresh
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* @see Policy#getPermissions(ProtectionDomain)
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*/
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public final PermissionCollection getPermissions() {
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lazyInitPermissions();
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return permissions;
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}
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/**
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* Check and see if this ProtectionDomain implies the permissions
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* expressed in the Permission object.
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* <p>
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* The set of permissions evaluated is a function of whether the
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* ProtectionDomain was constructed with a static set of permissions
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* or it was bound to a dynamically mapped set of permissions.
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* <p>
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* If the ProtectionDomain was constructed to a
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* {@link #ProtectionDomain(CodeSource, PermissionCollection)
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* statically bound} PermissionCollection then the permission will
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* only be checked against the PermissionCollection supplied at
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* construction.
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* <p>
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* However, if the ProtectionDomain was constructed with
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* the constructor variant which supports
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* {@link #ProtectionDomain(CodeSource, PermissionCollection,
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* ClassLoader, java.security.Principal[]) dynamically binding}
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* permissions, then the permission will be checked against the
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* combination of the PermissionCollection supplied at construction and
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* the current Policy binding.
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* <p>
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*
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* @param permission the Permission object to check.
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*
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* @return true if "permission" is implicit to this ProtectionDomain.
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*/
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public boolean implies(Permission permission) {
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if (hasAllPerm) {
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// internal permission collection already has AllPermission -
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// no need to go to policy
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return true;
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}
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if (!staticPermissions &&
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Policy.getPolicyNoCheck().implies(this, permission))
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return true;
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if (permissions != null)
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return permissions.implies(permission);
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return false;
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}
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/**
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* Convert a ProtectionDomain to a String.
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*/
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@Override public String toString() {
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lazyInitCodeSource();
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lazyInitClassLoader();
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String pals = "<no principals>";
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if (principals != null && principals.length > 0) {
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StringBuilder palBuf = new StringBuilder("(principals ");
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for (int i = 0; i < principals.length; i++) {
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palBuf.append(principals[i].getClass().getName() +
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" \"" + principals[i].getName() +
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"\"");
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if (i < principals.length-1)
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palBuf.append(",\n");
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else
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palBuf.append(")\n");
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}
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pals = palBuf.toString();
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}
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// Check if policy is set; we don't want to load
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// the policy prematurely here
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PermissionCollection pc = Policy.isSet() && seeAllp() ?
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mergePermissions():
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getPermissions();
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return "ProtectionDomain "+
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" "+codesource+"\n"+
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" "+classloader+"\n"+
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" "+pals+"\n"+
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" "+pc+"\n";
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}
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/**
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* Return true (merge policy permissions) in the following cases:
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*
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* . SecurityManager is null
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*
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* . SecurityManager is not null,
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* debug is not null,
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* SecurityManager impelmentation is in bootclasspath,
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* Policy implementation is in bootclasspath
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* (the bootclasspath restrictions avoid recursion)
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*
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* . SecurityManager is not null,
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* debug is null,
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* caller has Policy.getPolicy permission
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*/
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private static boolean seeAllp() {
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SecurityManager sm = System.getSecurityManager();
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if (sm == null) {
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return true;
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} else {
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|
Debug debug = Debug.getInstance("domain");
|
||
|
|
if (debug != null) {
|
||
|
|
if (sm.getClass().getClassLoader() == null &&
|
||
|
|
Policy.getPolicyNoCheck().getClass().getClassLoader()
|
||
|
|
== null) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
try {
|
||
|
|
sm.checkPermission(SecurityConstants.GET_POLICY_PERMISSION);
|
||
|
|
return true;
|
||
|
|
} catch (SecurityException se) {
|
||
|
|
// fall thru and return false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
private PermissionCollection mergePermissions() {
|
||
|
|
lazyInitPermissions();
|
||
|
|
if (staticPermissions)
|
||
|
|
return permissions;
|
||
|
|
|
||
|
|
PermissionCollection perms =
|
||
|
|
java.security.AccessController.doPrivileged
|
||
|
|
(new java.security.PrivilegedAction<PermissionCollection>() {
|
||
|
|
public PermissionCollection run() {
|
||
|
|
Policy p = Policy.getPolicyNoCheck();
|
||
|
|
return p.getPermissions(ProtectionDomain.this);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
Permissions mergedPerms = new Permissions();
|
||
|
|
int swag = 32;
|
||
|
|
int vcap = 8;
|
||
|
|
Enumeration<Permission> e;
|
||
|
|
List<Permission> pdVector = new ArrayList<>(vcap);
|
||
|
|
List<Permission> plVector = new ArrayList<>(swag);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Build a vector of domain permissions for subsequent merge
|
||
|
|
if (permissions != null) {
|
||
|
|
synchronized (permissions) {
|
||
|
|
e = permissions.elements();
|
||
|
|
while (e.hasMoreElements()) {
|
||
|
|
pdVector.add(e.nextElement());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Build a vector of Policy permissions for subsequent merge
|
||
|
|
if (perms != null) {
|
||
|
|
synchronized (perms) {
|
||
|
|
e = perms.elements();
|
||
|
|
while (e.hasMoreElements()) {
|
||
|
|
plVector.add(e.nextElement());
|
||
|
|
vcap++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (perms != null && permissions != null) {
|
||
|
|
//
|
||
|
|
// Weed out the duplicates from the policy. Unless a refresh
|
||
|
|
// has occured since the pd was consed this should result in
|
||
|
|
// an empty vector.
|
||
|
|
synchronized (permissions) {
|
||
|
|
e = permissions.elements(); // domain vs policy
|
||
|
|
while (e.hasMoreElements()) {
|
||
|
|
Permission pdp = e.nextElement();
|
||
|
|
Class pdpClass = pdp.getClass();
|
||
|
|
String pdpActions = pdp.getActions();
|
||
|
|
String pdpName = pdp.getName();
|
||
|
|
for (int i = 0; i < plVector.size(); i++) {
|
||
|
|
Permission pp = plVector.get(i);
|
||
|
|
if (pdpClass.isInstance(pp)) {
|
||
|
|
// The equals() method on some permissions
|
||
|
|
// have some side effects so this manual
|
||
|
|
// comparison is sufficient.
|
||
|
|
if (pdpName.equals(pp.getName()) &&
|
||
|
|
pdpActions.equals(pp.getActions())) {
|
||
|
|
plVector.remove(i);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (perms !=null) {
|
||
|
|
// the order of adding to merged perms and permissions
|
||
|
|
// needs to preserve the bugfix 4301064
|
||
|
|
|
||
|
|
for (int i = plVector.size()-1; i >= 0; i--) {
|
||
|
|
mergedPerms.add(plVector.get(i));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (permissions != null) {
|
||
|
|
for (int i = pdVector.size()-1; i >= 0; i--) {
|
||
|
|
mergedPerms.add(pdVector.get(i));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return mergedPerms;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used for storing ProtectionDomains as keys in a Map.
|
||
|
|
*/
|
||
|
|
final class Key {}
|
||
|
|
|
||
|
|
static {
|
||
|
|
SharedSecrets.setJavaSecurityProtectionDomainAccess(
|
||
|
|
new JavaSecurityProtectionDomainAccess() {
|
||
|
|
public ProtectionDomainCache getProtectionDomainCache() {
|
||
|
|
return new ProtectionDomainCache() {
|
||
|
|
private final Map<Key, PermissionCollection> map =
|
||
|
|
Collections.synchronizedMap
|
||
|
|
(new WeakHashMap<Key, PermissionCollection>());
|
||
|
|
public void put(ProtectionDomain pd,
|
||
|
|
PermissionCollection pc) {
|
||
|
|
map.put((pd == null ? null : pd.key), pc);
|
||
|
|
}
|
||
|
|
public PermissionCollection get(ProtectionDomain pd) {
|
||
|
|
return pd == null ? map.get(null) : map.get(pd.key);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|