| /* |
| * Copyright (c) 1997, 2015, 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.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectStreamField; |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * The BasicPermission class extends the Permission class, and |
| * can be used as the base class for permissions that want to |
| * follow the same naming convention as BasicPermission. |
| * <P> |
| * The name for a BasicPermission is the name of the given permission |
| * (for example, "exit", |
| * "setFactory", "print.queueJob", etc). The naming |
| * convention follows the hierarchical property naming convention. |
| * An asterisk may appear by itself, or if immediately preceded by a "." |
| * may appear at the end of the name, to signify a wildcard match. |
| * For example, "*" and "java.*" signify a wildcard match, while "*java", "a*b", |
| * and "java*" do not. |
| * <P> |
| * The action string (inherited from Permission) is unused. |
| * Thus, BasicPermission is commonly used as the base class for |
| * "named" permissions |
| * (ones that contain a name but no actions list; you either have the |
| * named permission or you don't.) |
| * Subclasses may implement actions on top of BasicPermission, |
| * if desired. |
| * |
| * @see java.security.Permission |
| * @see java.security.Permissions |
| * @see java.security.PermissionCollection |
| * @see java.lang.SecurityManager |
| * |
| * @author Marianne Mueller |
| * @author Roland Schemers |
| * @since 1.2 |
| */ |
| |
| public abstract class BasicPermission extends Permission |
| implements java.io.Serializable |
| { |
| |
| private static final long serialVersionUID = 6279438298436773498L; |
| |
| // does this permission have a wildcard at the end? |
| private transient boolean wildcard; |
| |
| // the name without the wildcard on the end |
| private transient String path; |
| |
| // is this permission the old-style exitVM permission (pre JDK 1.6)? |
| private transient boolean exitVM; |
| |
| /** |
| * initialize a BasicPermission object. Common to all constructors. |
| */ |
| private void init(String name) { |
| if (name == null) |
| throw new NullPointerException("name can't be null"); |
| |
| int len = name.length(); |
| |
| if (len == 0) { |
| throw new IllegalArgumentException("name can't be empty"); |
| } |
| |
| char last = name.charAt(len - 1); |
| |
| // Is wildcard or ends with ".*"? |
| if (last == '*' && (len == 1 || name.charAt(len - 2) == '.')) { |
| wildcard = true; |
| if (len == 1) { |
| path = ""; |
| } else { |
| path = name.substring(0, len - 1); |
| } |
| } else { |
| if (name.equals("exitVM")) { |
| wildcard = true; |
| path = "exitVM."; |
| exitVM = true; |
| } else { |
| path = name; |
| } |
| } |
| } |
| |
| /** |
| * Creates a new BasicPermission with the specified name. |
| * Name is the symbolic name of the permission, such as |
| * "setFactory", |
| * "print.queueJob", or "topLevelWindow", etc. |
| * |
| * @param name the name of the BasicPermission. |
| * |
| * @throws NullPointerException if {@code name} is {@code null}. |
| * @throws IllegalArgumentException if {@code name} is empty. |
| */ |
| public BasicPermission(String name) { |
| super(name); |
| init(name); |
| } |
| |
| |
| /** |
| * Creates a new BasicPermission object with the specified name. |
| * The name is the symbolic name of the BasicPermission, and the |
| * actions String is currently unused. |
| * |
| * @param name the name of the BasicPermission. |
| * @param actions ignored. |
| * |
| * @throws NullPointerException if {@code name} is {@code null}. |
| * @throws IllegalArgumentException if {@code name} is empty. |
| */ |
| public BasicPermission(String name, String actions) { |
| super(name); |
| init(name); |
| } |
| |
| /** |
| * Checks if the specified permission is "implied" by |
| * this object. |
| * <P> |
| * More specifically, this method returns true if: |
| * <ul> |
| * <li> {@code p}'s class is the same as this object's class, and |
| * <li> {@code p}'s name equals or (in the case of wildcards) |
| * is implied by this object's |
| * name. For example, "a.b.*" implies "a.b.c". |
| * </ul> |
| * |
| * @param p the permission to check against. |
| * |
| * @return true if the passed permission is equal to or |
| * implied by this permission, false otherwise. |
| */ |
| @Override |
| public boolean implies(Permission p) { |
| if ((p == null) || (p.getClass() != getClass())) |
| return false; |
| |
| BasicPermission that = (BasicPermission) p; |
| |
| if (this.wildcard) { |
| if (that.wildcard) { |
| // one wildcard can imply another |
| return that.path.startsWith(path); |
| } else { |
| // make sure ap.path is longer so a.b.* doesn't imply a.b |
| return (that.path.length() > this.path.length()) && |
| that.path.startsWith(this.path); |
| } |
| } else { |
| if (that.wildcard) { |
| // a non-wildcard can't imply a wildcard |
| return false; |
| } |
| else { |
| return this.path.equals(that.path); |
| } |
| } |
| } |
| |
| /** |
| * Checks two BasicPermission objects for equality. |
| * Checks that {@code obj}'s class is the same as this object's class |
| * and has the same name as this object. |
| * |
| * @param obj the object we are testing for equality with this object. |
| * @return true if {@code obj}'s class is the same as this object's class |
| * and has the same name as this BasicPermission object, false otherwise. |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) |
| return true; |
| |
| if ((obj == null) || (obj.getClass() != getClass())) |
| return false; |
| |
| BasicPermission bp = (BasicPermission) obj; |
| |
| return getName().equals(bp.getName()); |
| } |
| |
| |
| /** |
| * Returns the hash code value for this object. |
| * The hash code used is the hash code of the name, that is, |
| * {@code getName().hashCode()}, where {@code getName} is |
| * from the Permission superclass. |
| * |
| * @return a hash code value for this object. |
| */ |
| @Override |
| public int hashCode() { |
| return this.getName().hashCode(); |
| } |
| |
| /** |
| * Returns the canonical string representation of the actions, |
| * which currently is the empty string "", since there are no actions for |
| * a BasicPermission. |
| * |
| * @return the empty string "". |
| */ |
| @Override |
| public String getActions() { |
| return ""; |
| } |
| |
| /** |
| * Returns a new PermissionCollection object for storing BasicPermission |
| * objects. |
| * |
| * <p>BasicPermission objects must be stored in a manner that allows them |
| * to be inserted in any order, but that also enables the |
| * PermissionCollection {@code implies} method |
| * to be implemented in an efficient (and consistent) manner. |
| * |
| * @return a new PermissionCollection object suitable for |
| * storing BasicPermissions. |
| */ |
| @Override |
| public PermissionCollection newPermissionCollection() { |
| return new BasicPermissionCollection(this.getClass()); |
| } |
| |
| /** |
| * readObject is called to restore the state of the BasicPermission from |
| * a stream. |
| */ |
| private void readObject(ObjectInputStream s) |
| throws IOException, ClassNotFoundException |
| { |
| s.defaultReadObject(); |
| // init is called to initialize the rest of the values. |
| init(getName()); |
| } |
| |
| /** |
| * Returns the canonical name of this BasicPermission. |
| * All internal invocations of getName should invoke this method, so |
| * that the pre-JDK 1.6 "exitVM" and current "exitVM.*" permission are |
| * equivalent in equals/hashCode methods. |
| * |
| * @return the canonical name of this BasicPermission. |
| */ |
| final String getCanonicalName() { |
| return exitVM ? "exitVM.*" : getName(); |
| } |
| } |
| |
| /** |
| * A BasicPermissionCollection stores a collection |
| * of BasicPermission permissions. BasicPermission objects |
| * must be stored in a manner that allows them to be inserted in any |
| * order, but enable the implies function to evaluate the implies |
| * method in an efficient (and consistent) manner. |
| * |
| * A BasicPermissionCollection handles comparing a permission like "a.b.c.d.e" |
| * with a Permission such as "a.b.*", or "*". |
| * |
| * @see java.security.Permission |
| * @see java.security.Permissions |
| * |
| * |
| * @author Roland Schemers |
| * |
| * @serial include |
| */ |
| |
| final class BasicPermissionCollection |
| extends PermissionCollection |
| implements java.io.Serializable |
| { |
| |
| private static final long serialVersionUID = 739301742472979399L; |
| |
| /** |
| * Key is name, value is permission. All permission objects in |
| * collection must be of the same type. |
| * Not serialized; see serialization section at end of class. |
| */ |
| private transient ConcurrentHashMap<String, Permission> perms; |
| |
| /** |
| * This is set to {@code true} if this BasicPermissionCollection |
| * contains a BasicPermission with '*' as its permission name. |
| * |
| * @see #serialPersistentFields |
| */ |
| private boolean all_allowed; |
| |
| /** |
| * The class to which all BasicPermissions in this |
| * BasicPermissionCollection belong. |
| * |
| * @see #serialPersistentFields |
| */ |
| private Class<?> permClass; |
| |
| /** |
| * Create an empty BasicPermissionCollection object. |
| * |
| */ |
| public BasicPermissionCollection(Class<?> clazz) { |
| perms = new ConcurrentHashMap<>(11); |
| all_allowed = false; |
| permClass = clazz; |
| } |
| |
| /** |
| * Adds a permission to the BasicPermissions. The key for the hash is |
| * permission.path. |
| * |
| * @param permission the Permission object to add. |
| * |
| * @exception IllegalArgumentException - if the permission is not a |
| * BasicPermission, or if |
| * the permission is not of the |
| * same Class as the other |
| * permissions in this collection. |
| * |
| * @exception SecurityException - if this BasicPermissionCollection object |
| * has been marked readonly |
| */ |
| @Override |
| public void add(Permission permission) { |
| if (! (permission instanceof BasicPermission)) |
| throw new IllegalArgumentException("invalid permission: "+ |
| permission); |
| if (isReadOnly()) |
| throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection"); |
| |
| BasicPermission bp = (BasicPermission) permission; |
| |
| // make sure we only add new BasicPermissions of the same class |
| // Also check null for compatibility with deserialized form from |
| // previous versions. |
| if (permClass == null) { |
| // adding first permission |
| permClass = bp.getClass(); |
| } else { |
| if (bp.getClass() != permClass) |
| throw new IllegalArgumentException("invalid permission: " + |
| permission); |
| } |
| |
| String canonName = bp.getCanonicalName(); |
| perms.put(canonName, permission); |
| |
| // No sync on all_allowed; staleness OK |
| if (!all_allowed) { |
| if (canonName.equals("*")) |
| all_allowed = true; |
| } |
| } |
| |
| /** |
| * Check and see if this set of permissions implies the permissions |
| * expressed in "permission". |
| * |
| * @param permission the Permission object to compare |
| * |
| * @return true if "permission" is a proper subset of a permission in |
| * the set, false if not. |
| */ |
| @Override |
| public boolean implies(Permission permission) { |
| if (! (permission instanceof BasicPermission)) |
| return false; |
| |
| BasicPermission bp = (BasicPermission) permission; |
| |
| // random subclasses of BasicPermission do not imply each other |
| if (bp.getClass() != permClass) |
| return false; |
| |
| // short circuit if the "*" Permission was added |
| if (all_allowed) |
| return true; |
| |
| // strategy: |
| // Check for full match first. Then work our way up the |
| // path looking for matches on a.b..* |
| |
| String path = bp.getCanonicalName(); |
| //System.out.println("check "+path); |
| |
| Permission x = perms.get(path); |
| |
| if (x != null) { |
| // we have a direct hit! |
| return x.implies(permission); |
| } |
| |
| // work our way up the tree... |
| int last, offset; |
| |
| offset = path.length()-1; |
| |
| while ((last = path.lastIndexOf('.', offset)) != -1) { |
| |
| path = path.substring(0, last+1) + "*"; |
| //System.out.println("check "+path); |
| |
| x = perms.get(path); |
| |
| if (x != null) { |
| return x.implies(permission); |
| } |
| offset = last -1; |
| } |
| |
| // we don't have to check for "*" as it was already checked |
| // at the top (all_allowed), so we just return false |
| return false; |
| } |
| |
| /** |
| * Returns an enumeration of all the BasicPermission objects in the |
| * container. |
| * |
| * @return an enumeration of all the BasicPermission objects. |
| */ |
| @Override |
| public Enumeration<Permission> elements() { |
| return perms.elements(); |
| } |
| |
| // Need to maintain serialization interoperability with earlier releases, |
| // which had the serializable field: |
| // |
| // @serial the Hashtable is indexed by the BasicPermission name |
| // |
| // private Hashtable permissions; |
| /** |
| * @serialField permissions java.util.Hashtable |
| * The BasicPermissions in this BasicPermissionCollection. |
| * All BasicPermissions in the collection must belong to the same class. |
| * The Hashtable is indexed by the BasicPermission name; the value |
| * of the Hashtable entry is the permission. |
| * @serialField all_allowed boolean |
| * This is set to {@code true} if this BasicPermissionCollection |
| * contains a BasicPermission with '*' as its permission name. |
| * @serialField permClass java.lang.Class |
| * The class to which all BasicPermissions in this |
| * BasicPermissionCollection belongs. |
| */ |
| private static final ObjectStreamField[] serialPersistentFields = { |
| new ObjectStreamField("permissions", Hashtable.class), |
| new ObjectStreamField("all_allowed", Boolean.TYPE), |
| new ObjectStreamField("permClass", Class.class), |
| }; |
| |
| /** |
| * @serialData Default fields. |
| */ |
| /* |
| * Writes the contents of the perms field out as a Hashtable for |
| * serialization compatibility with earlier releases. all_allowed |
| * and permClass unchanged. |
| */ |
| private void writeObject(ObjectOutputStream out) throws IOException { |
| // Don't call out.defaultWriteObject() |
| |
| // Copy perms into a Hashtable |
| Hashtable<String, Permission> permissions = |
| new Hashtable<>(perms.size()*2); |
| |
| permissions.putAll(perms); |
| |
| // Write out serializable fields |
| ObjectOutputStream.PutField pfields = out.putFields(); |
| pfields.put("all_allowed", all_allowed); |
| pfields.put("permissions", permissions); |
| pfields.put("permClass", permClass); |
| out.writeFields(); |
| } |
| |
| /** |
| * readObject is called to restore the state of the |
| * BasicPermissionCollection from a stream. |
| */ |
| private void readObject(java.io.ObjectInputStream in) |
| throws IOException, ClassNotFoundException |
| { |
| // Don't call defaultReadObject() |
| |
| // Read in serialized fields |
| ObjectInputStream.GetField gfields = in.readFields(); |
| |
| // Get permissions |
| // writeObject writes a Hashtable<String, Permission> for the |
| // permissions key, so this cast is safe, unless the data is corrupt. |
| @SuppressWarnings("unchecked") |
| Hashtable<String, Permission> permissions = |
| (Hashtable<String, Permission>)gfields.get("permissions", null); |
| perms = new ConcurrentHashMap<>(permissions.size()*2); |
| perms.putAll(permissions); |
| |
| // Get all_allowed |
| all_allowed = gfields.get("all_allowed", false); |
| |
| // Get permClass |
| permClass = (Class<?>) gfields.get("permClass", null); |
| |
| if (permClass == null) { |
| // set permClass |
| Enumeration<Permission> e = permissions.elements(); |
| if (e.hasMoreElements()) { |
| Permission p = e.nextElement(); |
| permClass = p.getClass(); |
| } |
| } |
| } |
| } |