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 // Use object identity comparison against known-interned strings for
250 // performance benefit (these values are used heavily within the JDK).
251 if (actions == SecurityConstants.PROPERTY_READ_ACTION) {
252 return READ;
253 } if (actions == SecurityConstants.PROPERTY_WRITE_ACTION) {
254 return WRITE;
255 } else if (actions == SecurityConstants.PROPERTY_RW_ACTION) {
256 return READ|WRITE;
257 }
258
315 "invalid permission: " + actions);
316 }
317 i--;
318 }
319
320 // point i at the location of the comma minus one (or -1).
321 i -= matchlen;
322 }
323
324 return mask;
325 }
326
327
328 /**
329 * Return the canonical string representation of the actions.
330 * Always returns present actions in the following order:
331 * read, write.
332 *
333 * @return the canonical string representation of the actions.
334 */
335 static String getActions(int mask)
336 {
337 StringBuilder sb = new StringBuilder();
338 boolean comma = false;
339
340 if ((mask & READ) == READ) {
341 comma = true;
342 sb.append("read");
343 }
344
345 if ((mask & WRITE) == WRITE) {
346 if (comma) sb.append(',');
347 else comma = true;
348 sb.append("write");
349 }
350 return sb.toString();
351 }
352
353 /**
354 * Returns the "canonical string representation" of the actions.
355 * That is, this method always returns present actions in the following order:
356 * read, write. For example, if this PropertyPermission object
357 * allows both write and read actions, a call to <code>getActions</code>
358 * will return the string "read,write".
359 *
360 * @return the canonical string representation of the actions.
361 */
362 public String getActions()
363 {
364 if (actions == null)
365 actions = getActions(this.mask);
366
367 return actions;
368 }
369
370 /**
371 * Return the current action mask.
372 * Used by the PropertyPermissionCollection
373 *
374 * @return the actions mask.
375 */
376
377 int getMask() {
378 return mask;
379 }
380
381 /**
382 * Returns a new PermissionCollection object for storing
383 * PropertyPermission objects.
384 * <p>
385 *
386 * @return a new PermissionCollection object suitable for storing
387 * PropertyPermissions.
388 */
389
390 public PermissionCollection newPermissionCollection() {
391 return new PropertyPermissionCollection();
392 }
393
394
395 private static final long serialVersionUID = 885438825399942851L;
396
397 /**
398 * WriteObject is called to save the state of the PropertyPermission
399 * to a stream. The actions are serialized, and the superclass
400 * takes care of the name.
401 */
402 private synchronized void writeObject(java.io.ObjectOutputStream s)
403 throws IOException
404 {
405 // Write out the actions. The superclass takes care of the name
406 // call getActions to make sure actions field is initialized
407 if (actions == null)
408 getActions();
409 s.defaultWriteObject();
419 // Read in the action, then initialize the rest
420 s.defaultReadObject();
421 init(getMask(actions));
422 }
423 }
424
425 /**
426 * A PropertyPermissionCollection stores a set of PropertyPermission
427 * permissions.
428 *
429 * @see java.security.Permission
430 * @see java.security.Permissions
431 * @see java.security.PermissionCollection
432 *
433 *
434 * @author Roland Schemers
435 *
436 * @serial include
437 */
438 final class PropertyPermissionCollection extends PermissionCollection
439 implements Serializable
440 {
441
442 /**
443 * Key is property name; value is PropertyPermission.
444 * Not serialized; see serialization section at end of class.
445 */
446 private transient Map<String, PropertyPermission> perms;
447
448 /**
449 * Boolean saying if "*" is in the collection.
450 *
451 * @see #serialPersistentFields
452 */
453 // No sync access; OK for this to be stale.
454 private boolean all_allowed;
455
456 /**
457 * Create an empty PropertyPermissions object.
458 *
459 */
460
461 public PropertyPermissionCollection() {
462 perms = new HashMap<>(32); // Capacity for default policy
463 all_allowed = false;
464 }
465
466 /**
467 * Adds a permission to the PropertyPermissions. The key for the hash is
468 * the name.
469 *
470 * @param permission the Permission object to add.
471 *
472 * @exception IllegalArgumentException - if the permission is not a
473 * PropertyPermission
474 *
475 * @exception SecurityException - if this PropertyPermissionCollection
476 * object has been marked readonly
477 */
478
479 public void add(Permission permission)
480 {
481 if (! (permission instanceof PropertyPermission))
482 throw new IllegalArgumentException("invalid permission: "+
483 permission);
484 if (isReadOnly())
485 throw new SecurityException(
486 "attempt to add a Permission to a readonly PermissionCollection");
487
488 PropertyPermission pp = (PropertyPermission) permission;
489 String propName = pp.getName();
490
491 synchronized (this) {
492 PropertyPermission existing = perms.get(propName);
493
494 if (existing != null) {
495 int oldMask = existing.getMask();
496 int newMask = pp.getMask();
497 if (oldMask != newMask) {
498 int effective = oldMask | newMask;
499 String actions = PropertyPermission.getActions(effective);
500 perms.put(propName, new PropertyPermission(propName, actions));
501 }
502 } else {
503 perms.put(propName, pp);
504 }
505 }
506
507 if (!all_allowed) {
508 if (propName.equals("*"))
509 all_allowed = true;
510 }
511 }
512
513 /**
514 * Check and see if this set of permissions implies the permissions
515 * expressed in "permission".
516 *
517 * @param p the Permission object to compare
518 *
519 * @return true if "permission" is a proper subset of a permission in
520 * the set, false if not.
521 */
522
523 public boolean implies(Permission permission)
524 {
525 if (! (permission instanceof PropertyPermission))
526 return false;
527
528 PropertyPermission pp = (PropertyPermission) permission;
529 PropertyPermission x;
530
531 int desired = pp.getMask();
532 int effective = 0;
533
534 // short circuit if the "*" Permission was added
535 if (all_allowed) {
536 synchronized (this) {
537 x = perms.get("*");
538 }
539 if (x != null) {
540 effective |= x.getMask();
541 if ((effective & desired) == desired)
542 return true;
543 }
544 }
638 // Don't call out.defaultWriteObject()
639
640 // Copy perms into a Hashtable
641 Hashtable<String, Permission> permissions =
642 new Hashtable<>(perms.size()*2);
643 synchronized (this) {
644 permissions.putAll(perms);
645 }
646
647 // Write out serializable fields
648 ObjectOutputStream.PutField pfields = out.putFields();
649 pfields.put("all_allowed", all_allowed);
650 pfields.put("permissions", permissions);
651 out.writeFields();
652 }
653
654 /*
655 * Reads in a Hashtable of PropertyPermissions and saves them in the
656 * perms field. Reads in all_allowed.
657 */
658 private void readObject(ObjectInputStream in) throws IOException,
659 ClassNotFoundException {
660 // Don't call defaultReadObject()
661
662 // Read in serialized fields
663 ObjectInputStream.GetField gfields = in.readFields();
664
665 // Get all_allowed
666 all_allowed = gfields.get("all_allowed", false);
667
668 // Get permissions
669 @SuppressWarnings("unchecked")
670 Hashtable<String, PropertyPermission> permissions =
671 (Hashtable<String, PropertyPermission>)gfields.get("permissions", null);
672 perms = new HashMap<>(permissions.size()*2);
673 perms.putAll(permissions);
674 }
675 }
|
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 private void init(int mask) {
134 if ((mask & ALL) != mask)
135 throw new IllegalArgumentException("invalid actions mask");
136
137 if (mask == NONE)
138 throw new IllegalArgumentException("invalid actions mask");
139
140 if (getName() == null)
141 throw new NullPointerException("name can't be null");
142
143 this.mask = mask;
144 }
145
146 /**
147 * Creates a new PropertyPermission object with the specified name.
148 * The name is the name of the system property, and
149 * <i>actions</i> contains a comma-separated list of the
150 * desired actions granted on the property. Possible actions are
151 * "read" and "write".
152 *
153 * @param name the name of the PropertyPermission.
154 * @param actions the actions string.
155 *
156 * @throws NullPointerException if <code>name</code> is <code>null</code>.
157 * @throws IllegalArgumentException if <code>name</code> is empty or if
158 * <code>actions</code> is invalid.
159 */
160 public PropertyPermission(String name, String actions) {
161 super(name,actions);
162 init(getMask(actions));
163 }
164
165 /**
166 * Checks if this PropertyPermission object "implies" the specified
167 * permission.
168 * <P>
169 * More specifically, this method returns true if:<p>
170 * <ul>
171 * <li> <i>p</i> is an instanceof PropertyPermission,<p>
172 * <li> <i>p</i>'s actions are a subset of this
173 * object's actions, and <p>
174 * <li> <i>p</i>'s name is implied by this object's
175 * name. For example, "java.*" implies "java.home".
176 * </ul>
177 * @param p the permission to check against.
178 *
179 * @return true if the specified permission is implied by this object,
180 * false if not.
181 */
182 public boolean implies(Permission p) {
183 if (!(p instanceof PropertyPermission))
184 return false;
185
186 PropertyPermission that = (PropertyPermission) p;
187
188 // we get the effective mask. i.e., the "and" of this and that.
189 // They must be equal to that.mask for implies to return true.
190
191 return ((this.mask & that.mask) == that.mask) && super.implies(that);
192 }
193
194 /**
195 * Checks two PropertyPermission objects for equality. Checks that <i>obj</i> is
196 * a PropertyPermission, and has the same name and actions as this object.
197 * <P>
198 * @param obj the object we are testing for equality with this object.
199 * @return true if obj is a PropertyPermission, and has the same name and
200 * actions as this PropertyPermission object.
201 */
202 public boolean equals(Object obj) {
203 if (obj == this)
204 return true;
205
206 if (! (obj instanceof PropertyPermission))
207 return false;
208
209 PropertyPermission that = (PropertyPermission) obj;
210
211 return (this.mask == that.mask) &&
212 (this.getName().equals(that.getName()));
213 }
214
215 /**
216 * Returns the hash code value for this object.
217 * The hash code used is the hash code of this permissions name, that is,
218 * <code>getName().hashCode()</code>, where <code>getName</code> is
219 * from the Permission superclass.
220 *
221 * @return a hash code value for this object.
222 */
223 public int hashCode() {
224 return this.getName().hashCode();
225 }
226
227 /**
228 * Converts an actions String to an actions mask.
229 *
230 * @param actions the action string.
231 * @return the actions mask.
232 */
233 private static int getMask(String actions) {
234
235 int mask = NONE;
236
237 if (actions == null) {
238 return mask;
239 }
240
241 // Use object identity comparison against known-interned strings for
242 // performance benefit (these values are used heavily within the JDK).
243 if (actions == SecurityConstants.PROPERTY_READ_ACTION) {
244 return READ;
245 } if (actions == SecurityConstants.PROPERTY_WRITE_ACTION) {
246 return WRITE;
247 } else if (actions == SecurityConstants.PROPERTY_RW_ACTION) {
248 return READ|WRITE;
249 }
250
307 "invalid permission: " + actions);
308 }
309 i--;
310 }
311
312 // point i at the location of the comma minus one (or -1).
313 i -= matchlen;
314 }
315
316 return mask;
317 }
318
319
320 /**
321 * Return the canonical string representation of the actions.
322 * Always returns present actions in the following order:
323 * read, write.
324 *
325 * @return the canonical string representation of the actions.
326 */
327 static String getActions(int mask) {
328 StringBuilder sb = new StringBuilder();
329 boolean comma = false;
330
331 if ((mask & READ) == READ) {
332 comma = true;
333 sb.append("read");
334 }
335
336 if ((mask & WRITE) == WRITE) {
337 if (comma) sb.append(',');
338 else comma = true;
339 sb.append("write");
340 }
341 return sb.toString();
342 }
343
344 /**
345 * Returns the "canonical string representation" of the actions.
346 * That is, this method always returns present actions in the following order:
347 * read, write. For example, if this PropertyPermission object
348 * allows both write and read actions, a call to <code>getActions</code>
349 * will return the string "read,write".
350 *
351 * @return the canonical string representation of the actions.
352 */
353 public String getActions() {
354 if (actions == null)
355 actions = getActions(this.mask);
356
357 return actions;
358 }
359
360 /**
361 * Return the current action mask.
362 * Used by the PropertyPermissionCollection
363 *
364 * @return the actions mask.
365 */
366 int getMask() {
367 return mask;
368 }
369
370 /**
371 * Returns a new PermissionCollection object for storing
372 * PropertyPermission objects.
373 * <p>
374 *
375 * @return a new PermissionCollection object suitable for storing
376 * PropertyPermissions.
377 */
378 public PermissionCollection newPermissionCollection() {
379 return new PropertyPermissionCollection();
380 }
381
382
383 private static final long serialVersionUID = 885438825399942851L;
384
385 /**
386 * WriteObject is called to save the state of the PropertyPermission
387 * to a stream. The actions are serialized, and the superclass
388 * takes care of the name.
389 */
390 private synchronized void writeObject(java.io.ObjectOutputStream s)
391 throws IOException
392 {
393 // Write out the actions. The superclass takes care of the name
394 // call getActions to make sure actions field is initialized
395 if (actions == null)
396 getActions();
397 s.defaultWriteObject();
407 // Read in the action, then initialize the rest
408 s.defaultReadObject();
409 init(getMask(actions));
410 }
411 }
412
413 /**
414 * A PropertyPermissionCollection stores a set of PropertyPermission
415 * permissions.
416 *
417 * @see java.security.Permission
418 * @see java.security.Permissions
419 * @see java.security.PermissionCollection
420 *
421 *
422 * @author Roland Schemers
423 *
424 * @serial include
425 */
426 final class PropertyPermissionCollection extends PermissionCollection
427 implements Serializable
428 {
429
430 /**
431 * Key is property name; value is PropertyPermission.
432 * Not serialized; see serialization section at end of class.
433 */
434 private transient Map<String, PropertyPermission> perms;
435
436 /**
437 * Boolean saying if "*" is in the collection.
438 *
439 * @see #serialPersistentFields
440 */
441 // No sync access; OK for this to be stale.
442 private boolean all_allowed;
443
444 /**
445 * Create an empty PropertyPermissionCollection object.
446 */
447 public PropertyPermissionCollection() {
448 perms = new HashMap<>(32); // Capacity for default policy
449 all_allowed = false;
450 }
451
452 /**
453 * Adds a permission to the PropertyPermissions. The key for the hash is
454 * the name.
455 *
456 * @param permission the Permission object to add.
457 *
458 * @exception IllegalArgumentException - if the permission is not a
459 * PropertyPermission
460 *
461 * @exception SecurityException - if this PropertyPermissionCollection
462 * object has been marked readonly
463 */
464 public void add(Permission permission) {
465 if (! (permission instanceof PropertyPermission))
466 throw new IllegalArgumentException("invalid permission: "+
467 permission);
468 if (isReadOnly())
469 throw new SecurityException(
470 "attempt to add a Permission to a readonly PermissionCollection");
471
472 PropertyPermission pp = (PropertyPermission) permission;
473 String propName = pp.getName();
474
475 synchronized (this) {
476 PropertyPermission existing = perms.get(propName);
477
478 if (existing != null) {
479 int oldMask = existing.getMask();
480 int newMask = pp.getMask();
481 if (oldMask != newMask) {
482 int effective = oldMask | newMask;
483 String actions = PropertyPermission.getActions(effective);
484 perms.put(propName, new PropertyPermission(propName, actions));
485 }
486 } else {
487 perms.put(propName, pp);
488 }
489 }
490
491 if (!all_allowed) {
492 if (propName.equals("*"))
493 all_allowed = true;
494 }
495 }
496
497 /**
498 * Check and see if this set of permissions implies the permissions
499 * expressed in "permission".
500 *
501 * @param permission the Permission object to compare
502 *
503 * @return true if "permission" is a proper subset of a permission in
504 * the set, false if not.
505 */
506 public boolean implies(Permission permission) {
507 if (! (permission instanceof PropertyPermission))
508 return false;
509
510 PropertyPermission pp = (PropertyPermission) permission;
511 PropertyPermission x;
512
513 int desired = pp.getMask();
514 int effective = 0;
515
516 // short circuit if the "*" Permission was added
517 if (all_allowed) {
518 synchronized (this) {
519 x = perms.get("*");
520 }
521 if (x != null) {
522 effective |= x.getMask();
523 if ((effective & desired) == desired)
524 return true;
525 }
526 }
620 // Don't call out.defaultWriteObject()
621
622 // Copy perms into a Hashtable
623 Hashtable<String, Permission> permissions =
624 new Hashtable<>(perms.size()*2);
625 synchronized (this) {
626 permissions.putAll(perms);
627 }
628
629 // Write out serializable fields
630 ObjectOutputStream.PutField pfields = out.putFields();
631 pfields.put("all_allowed", all_allowed);
632 pfields.put("permissions", permissions);
633 out.writeFields();
634 }
635
636 /*
637 * Reads in a Hashtable of PropertyPermissions and saves them in the
638 * perms field. Reads in all_allowed.
639 */
640 private void readObject(ObjectInputStream in)
641 throws IOException, ClassNotFoundException
642 {
643 // Don't call defaultReadObject()
644
645 // Read in serialized fields
646 ObjectInputStream.GetField gfields = in.readFields();
647
648 // Get all_allowed
649 all_allowed = gfields.get("all_allowed", false);
650
651 // Get permissions
652 @SuppressWarnings("unchecked")
653 Hashtable<String, PropertyPermission> permissions =
654 (Hashtable<String, PropertyPermission>)gfields.get("permissions", null);
655 perms = new HashMap<>(permissions.size()*2);
656 perms.putAll(permissions);
657 }
658 }
|