| /* |
| * Copyright (c) 2000, 2012, 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 com.sun.rmi.rmid; |
| |
| import java.security.*; |
| import java.io.*; |
| import java.util.*; |
| |
| /** |
| * The ExecOptionPermission class represents permission for rmid to use |
| * a specific command-line option when launching an activation group. |
| * |
| * @author Ann Wollrath |
| * |
| * @serial exclude |
| */ |
| public final class ExecOptionPermission extends Permission |
| { |
| /** |
| * does this permission have a wildcard at the end? |
| */ |
| private transient boolean wildcard; |
| |
| /** |
| * the name without the wildcard on the end |
| */ |
| private transient String name; |
| |
| /** |
| * UID for serialization |
| */ |
| private static final long serialVersionUID = 5842294756823092756L; |
| |
| public ExecOptionPermission(String name) { |
| super(name); |
| init(name); |
| } |
| |
| public ExecOptionPermission(String name, String actions) { |
| this(name); |
| } |
| |
| /** |
| * Checks if the specified permission is "implied" by |
| * this object. |
| * <P> |
| * More specifically, this method returns true if: |
| * <ul> |
| * <li> <i>p</i>'s class is the same as this object's class, and |
| * <li> <i>p</i>'s name equals or (in the case of wildcards) |
| * is implied by this object's |
| * name. For example, "a.b.*" implies "a.b.c", and |
| * "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. |
| */ |
| public boolean implies(Permission p) { |
| if (!(p instanceof ExecOptionPermission)) |
| return false; |
| |
| ExecOptionPermission that = (ExecOptionPermission) p; |
| |
| if (this.wildcard) { |
| if (that.wildcard) { |
| // one wildcard can imply another |
| return that.name.startsWith(name); |
| } else { |
| // make sure p.name is longer so a.b.* doesn't imply a.b |
| return (that.name.length() > this.name.length()) && |
| that.name.startsWith(this.name); |
| } |
| } else { |
| if (that.wildcard) { |
| // a non-wildcard can't imply a wildcard |
| return false; |
| } else { |
| return this.name.equals(that.name); |
| } |
| } |
| } |
| |
| /** |
| * Checks two ExecOptionPermission objects for equality. |
| * Checks that <i>obj</i>'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 <i>obj</i> is an ExecOptionPermission, and has the same |
| * name as this ExecOptionPermission object, false otherwise. |
| */ |
| public boolean equals(Object obj) { |
| if (obj == this) |
| return true; |
| |
| if ((obj == null) || (obj.getClass() != getClass())) |
| return false; |
| |
| ExecOptionPermission that = (ExecOptionPermission) obj; |
| |
| return this.getName().equals(that.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()</code>, where <code>getName</code> is |
| * from the Permission superclass. |
| * |
| * @return a hash code value for this object. |
| */ |
| public int hashCode() { |
| return this.getName().hashCode(); |
| } |
| |
| /** |
| * Returns the canonical string representation of the actions. |
| * |
| * @return the canonical string representation of the actions. |
| */ |
| public String getActions() { |
| return ""; |
| } |
| |
| /** |
| * Returns a new PermissionCollection object for storing |
| * ExecOptionPermission objects. |
| * <p> |
| * An ExecOptionPermissionCollection stores a collection of |
| * ExecOptionPermission permissions. |
| * |
| * <p>ExecOptionPermission objects must be stored in a manner that allows |
| * them to be inserted in any order, but that also enables the |
| * PermissionCollection <code>implies</code> method |
| * to be implemented in an efficient (and consistent) manner. |
| * |
| * @return a new PermissionCollection object suitable for |
| * storing ExecOptionPermissions. |
| */ |
| public PermissionCollection newPermissionCollection() { |
| return new ExecOptionPermissionCollection(); |
| } |
| |
| /** |
| * readObject is called to restore the state of the ExecOptionPermission |
| * from a stream. |
| */ |
| private synchronized void readObject(java.io.ObjectInputStream s) |
| throws IOException, ClassNotFoundException |
| { |
| s.defaultReadObject(); |
| // init is called to initialize the rest of the values. |
| init(getName()); |
| } |
| |
| /** |
| * Initialize a ExecOptionPermission object. Common to all constructors. |
| * Also called during de-serialization. |
| */ |
| private void init(String name) |
| { |
| if (name == null) |
| throw new NullPointerException("name can't be null"); |
| |
| if (name.equals("")) { |
| throw new IllegalArgumentException("name can't be empty"); |
| } |
| |
| if (name.endsWith(".*") || name.endsWith("=*") || name.equals("*")) { |
| wildcard = true; |
| if (name.length() == 1) { |
| this.name = ""; |
| } else { |
| this.name = name.substring(0, name.length()-1); |
| } |
| } else { |
| this.name = name; |
| } |
| } |
| |
| /** |
| * A ExecOptionPermissionCollection stores a collection |
| * of ExecOptionPermission permissions. ExecOptionPermission 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 ExecOptionPermissionCollection handles comparing a permission like |
| * "a.b.c.d.e" * with a Permission such as "a.b.*", or "*". |
| * |
| * @serial include |
| */ |
| private static class ExecOptionPermissionCollection |
| extends PermissionCollection |
| implements java.io.Serializable |
| { |
| |
| private Hashtable<String, Permission> permissions; |
| private boolean all_allowed; // true if "*" is in the collection |
| private static final long serialVersionUID = -1242475729790124375L; |
| |
| /** |
| * Create an empty ExecOptionPermissionCollection. |
| */ |
| public ExecOptionPermissionCollection() { |
| permissions = new Hashtable<>(11); |
| all_allowed = false; |
| } |
| |
| /** |
| * Adds a permission to the collection. The key for the hash is |
| * permission.name. |
| * |
| * @param permission the Permission object to add. |
| * |
| * @exception IllegalArgumentException - if the permission is not a |
| * ExecOptionPermission |
| * |
| * @exception SecurityException - if this ExecOptionPermissionCollection |
| * object has been marked readonly |
| */ |
| |
| public void add(Permission permission) |
| { |
| if (! (permission instanceof ExecOptionPermission)) |
| throw new IllegalArgumentException("invalid permission: "+ |
| permission); |
| if (isReadOnly()) |
| throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection"); |
| |
| ExecOptionPermission p = (ExecOptionPermission) permission; |
| |
| permissions.put(p.getName(), permission); |
| if (!all_allowed) { |
| if (p.getName().equals("*")) |
| all_allowed = true; |
| } |
| } |
| |
| /** |
| * Check and see if this set of permissions implies the permissions |
| * expressed in "permission". |
| * |
| * @param p the Permission object to compare |
| * |
| * @return true if "permission" is a proper subset of a permission in |
| * the set, false if not. |
| */ |
| public boolean implies(Permission permission) |
| { |
| if (! (permission instanceof ExecOptionPermission)) |
| return false; |
| |
| ExecOptionPermission p = (ExecOptionPermission) permission; |
| |
| // short circuit if the "*" Permission was added |
| if (all_allowed) |
| return true; |
| |
| // strategy: |
| // Check for full match first. Then work our way up the |
| // name looking for matches on a.b.* |
| |
| String pname = p.getName(); |
| |
| Permission x = permissions.get(pname); |
| |
| if (x != null) |
| // we have a direct hit! |
| return x.implies(permission); |
| |
| |
| // work our way up the tree... |
| int last, offset; |
| |
| offset = pname.length() - 1; |
| |
| while ((last = pname.lastIndexOf('.', offset)) != -1) { |
| |
| pname = pname.substring(0, last+1) + "*"; |
| x = permissions.get(pname); |
| |
| if (x != null) { |
| return x.implies(permission); |
| } |
| offset = last - 1; |
| } |
| |
| // check for "=*" wildcard match |
| pname = p.getName(); |
| offset = pname.length() - 1; |
| |
| while ((last = pname.lastIndexOf('=', offset)) != -1) { |
| |
| pname = pname.substring(0, last+1) + "*"; |
| x = permissions.get(pname); |
| |
| 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 ExecOptionPermission objects in the |
| * container. |
| * |
| * @return an enumeration of all the ExecOptionPermission objects. |
| */ |
| |
| public Enumeration<Permission> elements() |
| { |
| return permissions.elements(); |
| } |
| } |
| } |