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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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1+/*
2+ * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+
26+package java.util;
27+
28+import java.io.Serializable;
29+import java.io.IOException;
30+import java.security.*;
31+import java.util.Map;
32+import java.util.HashMap;
33+import java.util.Enumeration;
34+import java.util.Hashtable;
35+import java.util.Collections;
36+import java.io.ObjectStreamField;
37+import java.io.ObjectOutputStream;
38+import java.io.ObjectInputStream;
39+import java.io.IOException;
40+import sun.security.util.SecurityConstants;
41+
42+/**
43+ * This class is for property permissions.
44+ *
45+ * <P>
46+ * The name is the name of the property ("java.home",
47+ * "os.name", etc). The naming
48+ * convention follows the hierarchical property naming convention.
49+ * Also, an asterisk
50+ * may appear at the end of the name, following a ".", or by itself, to
51+ * signify a wildcard match. For example: "java.*" or "*" is valid,
52+ * "*java" or "a*b" is not valid.
53+ * <P>
54+ * <P>
55+ * The actions to be granted are passed to the constructor in a string containing
56+ * a list of one or more comma-separated keywords. The possible keywords are
57+ * "read" and "write". Their meaning is defined as follows:
58+ * <P>
59+ * <DL>
60+ * <DT> read
61+ * <DD> read permission. Allows <code>System.getProperty</code> to
62+ * be called.
63+ * <DT> write
64+ * <DD> write permission. Allows <code>System.setProperty</code> to
65+ * be called.
66+ * </DL>
67+ * <P>
68+ * The actions string is converted to lowercase before processing.
69+ * <P>
70+ * Care should be taken before granting code permission to access
71+ * certain system properties. For example, granting permission to
72+ * access the "java.home" system property gives potentially malevolent
73+ * code sensitive information about the system environment (the Java
74+ * installation directory). Also, granting permission to access
75+ * the "user.name" and "user.home" system properties gives potentially
76+ * malevolent code sensitive information about the user environment
77+ * (the user's account name and home directory).
78+ *
79+ * @see java.security.BasicPermission
80+ * @see java.security.Permission
81+ * @see java.security.Permissions
82+ * @see java.security.PermissionCollection
83+ * @see java.lang.SecurityManager
84+ *
85+ *
86+ * @author Roland Schemers
87+ * @since 1.2
88+ *
89+ * @serial exclude
90+ */
91+
92+public final class PropertyPermission extends BasicPermission {
93+
94+ /**
95+ * Read action.
96+ */
97+ private final static int READ = 0x1;
98+
99+ /**
100+ * Write action.
101+ */
102+ private final static int WRITE = 0x2;
103+ /**
104+ * All actions (read,write);
105+ */
106+ private final static int ALL = READ|WRITE;
107+ /**
108+ * No actions.
109+ */
110+ private final static int NONE = 0x0;
111+
112+ /**
113+ * The actions mask.
114+ *
115+ */
116+ private transient int mask;
117+
118+ /**
119+ * The actions string.
120+ *
121+ * @serial
122+ */
123+ private String actions; // Left null as long as possible, then
124+ // created and re-used in the getAction function.
125+
126+ /**
127+ * initialize a PropertyPermission object. Common to all constructors.
128+ * Also called during de-serialization.
129+ *
130+ * @param mask the actions mask to use.
131+ *
132+ */
133+
134+ private void init(int mask)
135+ {
136+
137+ if ((mask & ALL) != mask)
138+ throw new IllegalArgumentException("invalid actions mask");
139+
140+ if (mask == NONE)
141+ throw new IllegalArgumentException("invalid actions mask");
142+
143+ if (getName() == null)
144+ throw new NullPointerException("name can't be null");
145+
146+ this.mask = mask;
147+ }
148+
149+ /**
150+ * Creates a new PropertyPermission object with the specified name.
151+ * The name is the name of the system property, and
152+ * <i>actions</i> contains a comma-separated list of the
153+ * desired actions granted on the property. Possible actions are
154+ * "read" and "write".
155+ *
156+ * @param name the name of the PropertyPermission.
157+ * @param actions the actions string.
158+ *
159+ * @throws NullPointerException if <code>name</code> is <code>null</code>.
160+ * @throws IllegalArgumentException if <code>name</code> is empty or if
161+ * <code>actions</code> is invalid.
162+ */
163+
164+ public PropertyPermission(String name, String actions)
165+ {
166+ super(name,actions);
167+ init(getMask(actions));
168+ }
169+
170+ /**
171+ * Checks if this PropertyPermission object "implies" the specified
172+ * permission.
173+ * <P>
174+ * More specifically, this method returns true if:<p>
175+ * <ul>
176+ * <li> <i>p</i> is an instanceof PropertyPermission,<p>
177+ * <li> <i>p</i>'s actions are a subset of this
178+ * object's actions, and <p>
179+ * <li> <i>p</i>'s name is implied by this object's
180+ * name. For example, "java.*" implies "java.home".
181+ * </ul>
182+ * @param p the permission to check against.
183+ *
184+ * @return true if the specified permission is implied by this object,
185+ * false if not.
186+ */
187+ public boolean implies(Permission p) {
188+ if (!(p instanceof PropertyPermission))
189+ return false;
190+
191+ PropertyPermission that = (PropertyPermission) p;
192+
193+ // we get the effective mask. i.e., the "and" of this and that.
194+ // They must be equal to that.mask for implies to return true.
195+
196+ return ((this.mask & that.mask) == that.mask) && super.implies(that);
197+ }
198+
199+
200+ /**
201+ * Checks two PropertyPermission objects for equality. Checks that <i>obj</i> is
202+ * a PropertyPermission, and has the same name and actions as this object.
203+ * <P>
204+ * @param obj the object we are testing for equality with this object.
205+ * @return true if obj is a PropertyPermission, and has the same name and
206+ * actions as this PropertyPermission object.
207+ */
208+ public boolean equals(Object obj) {
209+ if (obj == this)
210+ return true;
211+
212+ if (! (obj instanceof PropertyPermission))
213+ return false;
214+
215+ PropertyPermission that = (PropertyPermission) obj;
216+
217+ return (this.mask == that.mask) &&
218+ (this.getName().equals(that.getName()));
219+ }
220+
221+ /**
222+ * Returns the hash code value for this object.
223+ * The hash code used is the hash code of this permissions name, that is,
224+ * <code>getName().hashCode()</code>, where <code>getName</code> is
225+ * from the Permission superclass.
226+ *
227+ * @return a hash code value for this object.
228+ */
229+
230+ public int hashCode() {
231+ return this.getName().hashCode();
232+ }
233+
234+
235+ /**
236+ * Converts an actions String to an actions mask.
237+ *
238+ * @param action the action string.
239+ * @return the actions mask.
240+ */
241+ private static int getMask(String actions) {
242+
243+ int mask = NONE;
244+
245+ if (actions == null) {
246+ return mask;
247+ }
248+
249+ // Check against use of constants (used heavily within the JDK)
250+ if (actions == SecurityConstants.PROPERTY_READ_ACTION) {
251+ return READ;
252+ } if (actions == SecurityConstants.PROPERTY_WRITE_ACTION) {
253+ return WRITE;
254+ } else if (actions == SecurityConstants.PROPERTY_RW_ACTION) {
255+ return READ|WRITE;
256+ }
257+
258+ char[] a = actions.toCharArray();
259+
260+ int i = a.length - 1;
261+ if (i < 0)
262+ return mask;
263+
264+ while (i != -1) {
265+ char c;
266+
267+ // skip whitespace
268+ while ((i!=-1) && ((c = a[i]) == ' ' ||
269+ c == '\r' ||
270+ c == '\n' ||
271+ c == '\f' ||
272+ c == '\t'))
273+ i--;
274+
275+ // check for the known strings
276+ int matchlen;
277+
278+ if (i >= 3 && (a[i-3] == 'r' || a[i-3] == 'R') &&
279+ (a[i-2] == 'e' || a[i-2] == 'E') &&
280+ (a[i-1] == 'a' || a[i-1] == 'A') &&
281+ (a[i] == 'd' || a[i] == 'D'))
282+ {
283+ matchlen = 4;
284+ mask |= READ;
285+
286+ } else if (i >= 4 && (a[i-4] == 'w' || a[i-4] == 'W') &&
287+ (a[i-3] == 'r' || a[i-3] == 'R') &&
288+ (a[i-2] == 'i' || a[i-2] == 'I') &&
289+ (a[i-1] == 't' || a[i-1] == 'T') &&
290+ (a[i] == 'e' || a[i] == 'E'))
291+ {
292+ matchlen = 5;
293+ mask |= WRITE;
294+
295+ } else {
296+ // parse error
297+ throw new IllegalArgumentException(
298+ "invalid permission: " + actions);
299+ }
300+
301+ // make sure we didn't just match the tail of a word
302+ // like "ackbarfaccept". Also, skip to the comma.
303+ boolean seencomma = false;
304+ while (i >= matchlen && !seencomma) {
305+ switch(a[i-matchlen]) {
306+ case ',':
307+ seencomma = true;
308+ /*FALLTHROUGH*/
309+ case ' ': case '\r': case '\n':
310+ case '\f': case '\t':
311+ break;
312+ default:
313+ throw new IllegalArgumentException(
314+ "invalid permission: " + actions);
315+ }
316+ i--;
317+ }
318+
319+ // point i at the location of the comma minus one (or -1).
320+ i -= matchlen;
321+ }
322+
323+ return mask;
324+ }
325+
326+
327+ /**
328+ * Return the canonical string representation of the actions.
329+ * Always returns present actions in the following order:
330+ * read, write.
331+ *
332+ * @return the canonical string representation of the actions.
333+ */
334+ static String getActions(int mask)
335+ {
336+ StringBuilder sb = new StringBuilder();
337+ boolean comma = false;
338+
339+ if ((mask & READ) == READ) {
340+ comma = true;
341+ sb.append("read");
342+ }
343+
344+ if ((mask & WRITE) == WRITE) {
345+ if (comma) sb.append(',');
346+ else comma = true;
347+ sb.append("write");
348+ }
349+ return sb.toString();
350+ }
351+
352+ /**
353+ * Returns the "canonical string representation" of the actions.
354+ * That is, this method always returns present actions in the following order:
355+ * read, write. For example, if this PropertyPermission object
356+ * allows both write and read actions, a call to <code>getActions</code>
357+ * will return the string "read,write".
358+ *
359+ * @return the canonical string representation of the actions.
360+ */
361+ public String getActions()
362+ {
363+ if (actions == null)
364+ actions = getActions(this.mask);
365+
366+ return actions;
367+ }
368+
369+ /**
370+ * Return the current action mask.
371+ * Used by the PropertyPermissionCollection
372+ *
373+ * @return the actions mask.
374+ */
375+
376+ int getMask() {
377+ return mask;
378+ }
379+
380+ /**
381+ * Returns a new PermissionCollection object for storing
382+ * PropertyPermission objects.
383+ * <p>
384+ *
385+ * @return a new PermissionCollection object suitable for storing
386+ * PropertyPermissions.
387+ */
388+
389+ public PermissionCollection newPermissionCollection() {
390+ return new PropertyPermissionCollection();
391+ }
392+
393+
394+ private static final long serialVersionUID = 885438825399942851L;
395+
396+ /**
397+ * WriteObject is called to save the state of the PropertyPermission
398+ * to a stream. The actions are serialized, and the superclass
399+ * takes care of the name.
400+ */
401+ private synchronized void writeObject(java.io.ObjectOutputStream s)
402+ throws IOException
403+ {
404+ // Write out the actions. The superclass takes care of the name
405+ // call getActions to make sure actions field is initialized
406+ if (actions == null)
407+ getActions();
408+ s.defaultWriteObject();
409+ }
410+
411+ /**
412+ * readObject is called to restore the state of the PropertyPermission from
413+ * a stream.
414+ */
415+ private synchronized void readObject(java.io.ObjectInputStream s)
416+ throws IOException, ClassNotFoundException
417+ {
418+ // Read in the action, then initialize the rest
419+ s.defaultReadObject();
420+ init(getMask(actions));
421+ }
422+}
423+
424+/**
425+ * A PropertyPermissionCollection stores a set of PropertyPermission
426+ * permissions.
427+ *
428+ * @see java.security.Permission
429+ * @see java.security.Permissions
430+ * @see java.security.PermissionCollection
431+ *
432+ *
433+ * @author Roland Schemers
434+ *
435+ * @serial include
436+ */
437+final class PropertyPermissionCollection extends PermissionCollection
438+implements Serializable
439+{
440+
441+ /**
442+ * Key is property name; value is PropertyPermission.
443+ * Not serialized; see serialization section at end of class.
444+ */
445+ private transient Map perms;
446+
447+ /**
448+ * Boolean saying if "*" is in the collection.
449+ *
450+ * @see #serialPersistentFields
451+ */
452+ // No sync access; OK for this to be stale.
453+ private boolean all_allowed;
454+
455+ /**
456+ * Create an empty PropertyPermissions object.
457+ *
458+ */
459+
460+ public PropertyPermissionCollection() {
461+ perms = new HashMap(32); // Capacity for default policy
462+ all_allowed = false;
463+ }
464+
465+ /**
466+ * Adds a permission to the PropertyPermissions. The key for the hash is
467+ * the name.
468+ *
469+ * @param permission the Permission object to add.
470+ *
471+ * @exception IllegalArgumentException - if the permission is not a
472+ * PropertyPermission
473+ *
474+ * @exception SecurityException - if this PropertyPermissionCollection
475+ * object has been marked readonly
476+ */
477+
478+ public void add(Permission permission)
479+ {
480+ if (! (permission instanceof PropertyPermission))
481+ throw new IllegalArgumentException("invalid permission: "+
482+ permission);
483+ if (isReadOnly())
484+ throw new SecurityException(
485+ "attempt to add a Permission to a readonly PermissionCollection");
486+
487+ PropertyPermission pp = (PropertyPermission) permission;
488+ String propName = pp.getName();
489+
490+ synchronized (this) {
491+ PropertyPermission existing = (PropertyPermission) perms.get(propName);
492+
493+ if (existing != null) {
494+ int oldMask = existing.getMask();
495+ int newMask = pp.getMask();
496+ if (oldMask != newMask) {
497+ int effective = oldMask | newMask;
498+ String actions = PropertyPermission.getActions(effective);
499+ perms.put(propName, new PropertyPermission(propName, actions));
500+ }
501+ } else {
502+ perms.put(propName, permission);
503+ }
504+ }
505+
506+ if (!all_allowed) {
507+ if (propName.equals("*"))
508+ all_allowed = true;
509+ }
510+ }
511+
512+ /**
513+ * Check and see if this set of permissions implies the permissions
514+ * expressed in "permission".
515+ *
516+ * @param p the Permission object to compare
517+ *
518+ * @return true if "permission" is a proper subset of a permission in
519+ * the set, false if not.
520+ */
521+
522+ public boolean implies(Permission permission)
523+ {
524+ if (! (permission instanceof PropertyPermission))
525+ return false;
526+
527+ PropertyPermission pp = (PropertyPermission) permission;
528+ PropertyPermission x;
529+
530+ int desired = pp.getMask();
531+ int effective = 0;
532+
533+ // short circuit if the "*" Permission was added
534+ if (all_allowed) {
535+ synchronized (this) {
536+ x = (PropertyPermission) perms.get("*");
537+ }
538+ if (x != null) {
539+ effective |= x.getMask();
540+ if ((effective & desired) == desired)
541+ return true;
542+ }
543+ }
544+
545+ // strategy:
546+ // Check for full match first. Then work our way up the
547+ // name looking for matches on a.b.*
548+
549+ String name = pp.getName();
550+ //System.out.println("check "+name);
551+
552+ synchronized (this) {
553+ x = (PropertyPermission) perms.get(name);
554+ }
555+
556+ if (x != null) {
557+ // we have a direct hit!
558+ effective |= x.getMask();
559+ if ((effective & desired) == desired)
560+ return true;
561+ }
562+
563+ // work our way up the tree...
564+ int last, offset;
565+
566+ offset = name.length()-1;
567+
568+ while ((last = name.lastIndexOf(".", offset)) != -1) {
569+
570+ name = name.substring(0, last+1) + "*";
571+ //System.out.println("check "+name);
572+ synchronized (this) {
573+ x = (PropertyPermission) perms.get(name);
574+ }
575+
576+ if (x != null) {
577+ effective |= x.getMask();
578+ if ((effective & desired) == desired)
579+ return true;
580+ }
581+ offset = last -1;
582+ }
583+
584+ // we don't have to check for "*" as it was already checked
585+ // at the top (all_allowed), so we just return false
586+ return false;
587+ }
588+
589+ /**
590+ * Returns an enumeration of all the PropertyPermission objects in the
591+ * container.
592+ *
593+ * @return an enumeration of all the PropertyPermission objects.
594+ */
595+
596+ public Enumeration elements() {
597+ // Convert Iterator of Map values into an Enumeration
598+ synchronized (this) {
599+ return Collections.enumeration(perms.values());
600+ }
601+ }
602+
603+ private static final long serialVersionUID = 7015263904581634791L;
604+
605+ // Need to maintain serialization interoperability with earlier releases,
606+ // which had the serializable field:
607+ //
608+ // Table of permissions.
609+ //
610+ // @serial
611+ //
612+ // private Hashtable permissions;
613+ /**
614+ * @serialField permissions java.util.Hashtable
615+ * A table of the PropertyPermissions.
616+ * @serialField all_allowed boolean
617+ * boolean saying if "*" is in the collection.
618+ */
619+ private static final ObjectStreamField[] serialPersistentFields = {
620+ new ObjectStreamField("permissions", Hashtable.class),
621+ new ObjectStreamField("all_allowed", Boolean.TYPE),
622+ };
623+
624+ /**
625+ * @serialData Default fields.
626+ */
627+ /*
628+ * Writes the contents of the perms field out as a Hashtable for
629+ * serialization compatibility with earlier releases. all_allowed
630+ * unchanged.
631+ */
632+ private void writeObject(ObjectOutputStream out) throws IOException {
633+ // Don't call out.defaultWriteObject()
634+
635+ // Copy perms into a Hashtable
636+ Hashtable permissions = new Hashtable(perms.size()*2);
637+ synchronized (this) {
638+ permissions.putAll(perms);
639+ }
640+
641+ // Write out serializable fields
642+ ObjectOutputStream.PutField pfields = out.putFields();
643+ pfields.put("all_allowed", all_allowed);
644+ pfields.put("permissions", permissions);
645+ out.writeFields();
646+ }
647+
648+ /*
649+ * Reads in a Hashtable of PropertyPermissions and saves them in the
650+ * perms field. Reads in all_allowed.
651+ */
652+ private void readObject(ObjectInputStream in) throws IOException,
653+ ClassNotFoundException {
654+ // Don't call defaultReadObject()
655+
656+ // Read in serialized fields
657+ ObjectInputStream.GetField gfields = in.readFields();
658+
659+ // Get all_allowed
660+ all_allowed = gfields.get("all_allowed", false);
661+
662+ // Get permissions
663+ Hashtable permissions = (Hashtable)gfields.get("permissions", null);
664+ perms = new HashMap(permissions.size()*2);
665+ perms.putAll(permissions);
666+ }
667+}