| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * 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. |
| */ |
| |
| package java.security; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.WeakHashMap; |
| import sun.misc.JavaSecurityProtectionDomainAccess; |
| import static sun.misc.JavaSecurityProtectionDomainAccess.ProtectionDomainCache; |
| import sun.security.util.Debug; |
| import sun.security.util.SecurityConstants; |
| import sun.misc.JavaSecurityAccess; |
| import sun.misc.SharedSecrets; |
| |
| /** |
| * |
| *<p> |
| * This ProtectionDomain class encapsulates the characteristics of a domain, |
| * which encloses a set of classes whose instances are granted a set |
| * of permissions when being executed on behalf of a given set of Principals. |
| * <p> |
| * A static set of permissions can be bound to a ProtectionDomain when it is |
| * constructed; such permissions are granted to the domain regardless of the |
| * Policy in force. However, to support dynamic security policies, a |
| * ProtectionDomain can also be constructed such that it is dynamically |
| * mapped to a set of permissions by the current Policy whenever a permission |
| * is checked. |
| * <p> |
| * |
| * @author Li Gong |
| * @author Roland Schemers |
| * @author Gary Ellison |
| */ |
| |
| public class ProtectionDomain { |
| private static class JavaSecurityAccessImpl implements JavaSecurityAccess { |
| |
| private JavaSecurityAccessImpl() { |
| } |
| |
| @Override |
| public <T> T doIntersectionPrivilege( |
| PrivilegedAction<T> action, |
| final AccessControlContext stack, |
| final AccessControlContext context) { |
| if (action == null) { |
| throw new NullPointerException(); |
| } |
| |
| return AccessController.doPrivileged( |
| action, |
| getCombinedACC(context, stack) |
| ); |
| } |
| |
| @Override |
| public <T> T doIntersectionPrivilege( |
| PrivilegedAction<T> action, |
| AccessControlContext context) { |
| return doIntersectionPrivilege(action, |
| AccessController.getContext(), context); |
| } |
| |
| private static AccessControlContext getCombinedACC(AccessControlContext context, AccessControlContext stack) { |
| AccessControlContext acc = new AccessControlContext(context, stack.getCombiner(), true); |
| |
| return new AccessControlContext(stack.getContext(), acc).optimize(); |
| } |
| } |
| |
| static { |
| // Set up JavaSecurityAccess in SharedSecrets |
| SharedSecrets.setJavaSecurityAccess(new JavaSecurityAccessImpl()); |
| } |
| |
| /* CodeSource */ |
| private CodeSource codesource ; |
| |
| /* ClassLoader the protection domain was consed from */ |
| private ClassLoader classloader; |
| |
| /* Principals running-as within this protection domain */ |
| private Principal[] principals; |
| |
| /* the rights this protection domain is granted */ |
| private PermissionCollection permissions; |
| |
| /* if the permissions object has AllPermission */ |
| private boolean hasAllPerm = false; |
| |
| /* the PermissionCollection is static (pre 1.4 constructor) |
| or dynamic (via a policy refresh) */ |
| private boolean staticPermissions; |
| |
| /* |
| * An object used as a key when the ProtectionDomain is stored in a Map. |
| */ |
| final Key key = new Key(); |
| |
| private static final Debug debug = Debug.getInstance("domain"); |
| |
| /** |
| * Creates a new ProtectionDomain with the given CodeSource and |
| * Permissions. If the permissions object is not null, then |
| * {@code setReadOnly())} will be called on the passed in |
| * Permissions object. The only permissions granted to this domain |
| * are the ones specified; the current Policy will not be consulted. |
| * |
| * @param codesource the codesource associated with this domain |
| * @param permissions the permissions granted to this domain |
| */ |
| public ProtectionDomain(CodeSource codesource, |
| PermissionCollection permissions) { |
| this.codesource = codesource; |
| if (permissions != null) { |
| this.permissions = permissions; |
| this.permissions.setReadOnly(); |
| if (permissions instanceof Permissions && |
| ((Permissions)permissions).allPermission != null) { |
| hasAllPerm = true; |
| } |
| } |
| this.classloader = null; |
| this.principals = new Principal[0]; |
| staticPermissions = true; |
| } |
| |
| /** |
| * Creates a new ProtectionDomain qualified by the given CodeSource, |
| * Permissions, ClassLoader and array of Principals. If the |
| * permissions object is not null, then {@code setReadOnly()} |
| * will be called on the passed in Permissions object. |
| * The permissions granted to this domain are dynamic; they include |
| * both the static permissions passed to this constructor, and any |
| * permissions granted to this domain by the current Policy at the |
| * time a permission is checked. |
| * <p> |
| * This constructor is typically used by |
| * {@link SecureClassLoader ClassLoaders} |
| * and {@link DomainCombiner DomainCombiners} which delegate to |
| * {@code Policy} to actively associate the permissions granted to |
| * this domain. This constructor affords the |
| * Policy provider the opportunity to augment the supplied |
| * PermissionCollection to reflect policy changes. |
| * <p> |
| * |
| * @param codesource the CodeSource associated with this domain |
| * @param permissions the permissions granted to this domain |
| * @param classloader the ClassLoader associated with this domain |
| * @param principals the array of Principals associated with this |
| * domain. The contents of the array are copied to protect against |
| * subsequent modification. |
| * @see Policy#refresh |
| * @see Policy#getPermissions(ProtectionDomain) |
| * @since 1.4 |
| */ |
| public ProtectionDomain(CodeSource codesource, |
| PermissionCollection permissions, |
| ClassLoader classloader, |
| Principal[] principals) { |
| this.codesource = codesource; |
| if (permissions != null) { |
| this.permissions = permissions; |
| this.permissions.setReadOnly(); |
| if (permissions instanceof Permissions && |
| ((Permissions)permissions).allPermission != null) { |
| hasAllPerm = true; |
| } |
| } |
| this.classloader = classloader; |
| this.principals = (principals != null ? principals.clone(): |
| new Principal[0]); |
| staticPermissions = false; |
| } |
| |
| /** |
| * Returns the CodeSource of this domain. |
| * @return the CodeSource of this domain which may be null. |
| * @since 1.2 |
| */ |
| public final CodeSource getCodeSource() { |
| return this.codesource; |
| } |
| |
| |
| /** |
| * Returns the ClassLoader of this domain. |
| * @return the ClassLoader of this domain which may be null. |
| * |
| * @since 1.4 |
| */ |
| public final ClassLoader getClassLoader() { |
| return this.classloader; |
| } |
| |
| |
| /** |
| * Returns an array of principals for this domain. |
| * @return a non-null array of principals for this domain. |
| * Returns a new array each time this method is called. |
| * |
| * @since 1.4 |
| */ |
| public final Principal[] getPrincipals() { |
| return this.principals.clone(); |
| } |
| |
| /** |
| * Returns the static permissions granted to this domain. |
| * |
| * @return the static set of permissions for this domain which may be null. |
| * @see Policy#refresh |
| * @see Policy#getPermissions(ProtectionDomain) |
| */ |
| public final PermissionCollection getPermissions() { |
| return permissions; |
| } |
| |
| /** |
| * Check and see if this ProtectionDomain implies the permissions |
| * expressed in the Permission object. |
| * <p> |
| * The set of permissions evaluated is a function of whether the |
| * ProtectionDomain was constructed with a static set of permissions |
| * or it was bound to a dynamically mapped set of permissions. |
| * <p> |
| * If the ProtectionDomain was constructed to a |
| * {@link #ProtectionDomain(CodeSource, PermissionCollection) |
| * statically bound} PermissionCollection then the permission will |
| * only be checked against the PermissionCollection supplied at |
| * construction. |
| * <p> |
| * However, if the ProtectionDomain was constructed with |
| * the constructor variant which supports |
| * {@link #ProtectionDomain(CodeSource, PermissionCollection, |
| * ClassLoader, java.security.Principal[]) dynamically binding} |
| * permissions, then the permission will be checked against the |
| * combination of the PermissionCollection supplied at construction and |
| * the current Policy binding. |
| * <p> |
| * |
| * @param permission the Permission object to check. |
| * |
| * @return true if "permission" is implicit to this ProtectionDomain. |
| */ |
| public boolean implies(Permission permission) { |
| |
| if (hasAllPerm) { |
| // internal permission collection already has AllPermission - |
| // no need to go to policy |
| return true; |
| } |
| |
| if (!staticPermissions && |
| Policy.getPolicyNoCheck().implies(this, permission)) |
| return true; |
| if (permissions != null) |
| return permissions.implies(permission); |
| |
| return false; |
| } |
| |
| // called by the VM -- do not remove |
| boolean impliesCreateAccessControlContext() { |
| return implies(SecurityConstants.CREATE_ACC_PERMISSION); |
| } |
| |
| /** |
| * Convert a ProtectionDomain to a String. |
| */ |
| @Override public String toString() { |
| String pals = "<no principals>"; |
| if (principals != null && principals.length > 0) { |
| StringBuilder palBuf = new StringBuilder("(principals "); |
| |
| for (int i = 0; i < principals.length; i++) { |
| palBuf.append(principals[i].getClass().getName() + |
| " \"" + principals[i].getName() + |
| "\""); |
| if (i < principals.length-1) |
| palBuf.append(",\n"); |
| else |
| palBuf.append(")\n"); |
| } |
| pals = palBuf.toString(); |
| } |
| |
| // Check if policy is set; we don't want to load |
| // the policy prematurely here |
| PermissionCollection pc = Policy.isSet() && seeAllp() ? |
| mergePermissions(): |
| getPermissions(); |
| |
| return "ProtectionDomain "+ |
| " "+codesource+"\n"+ |
| " "+classloader+"\n"+ |
| " "+pals+"\n"+ |
| " "+pc+"\n"; |
| } |
| |
| /** |
| * Return true (merge policy permissions) in the following cases: |
| * |
| * . SecurityManager is null |
| * |
| * . SecurityManager is not null, |
| * debug is not null, |
| * SecurityManager impelmentation is in bootclasspath, |
| * Policy implementation is in bootclasspath |
| * (the bootclasspath restrictions avoid recursion) |
| * |
| * . SecurityManager is not null, |
| * debug is null, |
| * caller has Policy.getPolicy permission |
| */ |
| private static boolean seeAllp() { |
| SecurityManager sm = System.getSecurityManager(); |
| |
| if (sm == null) { |
| return true; |
| } else { |
| 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() { |
| 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 occurred 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); |
| } |
| }; |
| } |
| |
| @Override |
| public boolean getStaticPermissionsField(ProtectionDomain pd) { |
| return pd.staticPermissions; |
| } |
| }); |
| } |
| } |
