J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1995-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.lang; |
| 27 | |
| 28 | import java.security.*; |
| 29 | import java.io.FileDescriptor; |
| 30 | import java.io.File; |
| 31 | import java.io.FilePermission; |
| 32 | import java.awt.AWTPermission; |
| 33 | import java.util.PropertyPermission; |
| 34 | import java.lang.RuntimePermission; |
| 35 | import java.net.SocketPermission; |
| 36 | import java.net.NetPermission; |
| 37 | import java.util.Hashtable; |
| 38 | import java.net.InetAddress; |
| 39 | import java.lang.reflect.Member; |
| 40 | import java.lang.reflect.*; |
| 41 | import java.net.URL; |
| 42 | |
| 43 | import sun.security.util.SecurityConstants; |
| 44 | |
| 45 | /** |
| 46 | * The security manager is a class that allows |
| 47 | * applications to implement a security policy. It allows an |
| 48 | * application to determine, before performing a possibly unsafe or |
| 49 | * sensitive operation, what the operation is and whether |
| 50 | * it is being attempted in a security context that allows the |
| 51 | * operation to be performed. The |
| 52 | * application can allow or disallow the operation. |
| 53 | * <p> |
| 54 | * The <code>SecurityManager</code> class contains many methods with |
| 55 | * names that begin with the word <code>check</code>. These methods |
| 56 | * are called by various methods in the Java libraries before those |
| 57 | * methods perform certain potentially sensitive operations. The |
| 58 | * invocation of such a <code>check</code> method typically looks like this: |
| 59 | * <p><blockquote><pre> |
| 60 | * SecurityManager security = System.getSecurityManager(); |
| 61 | * if (security != null) { |
| 62 | * security.check<i>XXX</i>(argument, . . . ); |
| 63 | * } |
| 64 | * </pre></blockquote> |
| 65 | * <p> |
| 66 | * The security manager is thereby given an opportunity to prevent |
| 67 | * completion of the operation by throwing an exception. A security |
| 68 | * manager routine simply returns if the operation is permitted, but |
| 69 | * throws a <code>SecurityException</code> if the operation is not |
| 70 | * permitted. The only exception to this convention is |
| 71 | * <code>checkTopLevelWindow</code>, which returns a |
| 72 | * <code>boolean</code> value. |
| 73 | * <p> |
| 74 | * The current security manager is set by the |
| 75 | * <code>setSecurityManager</code> method in class |
| 76 | * <code>System</code>. The current security manager is obtained |
| 77 | * by the <code>getSecurityManager</code> method. |
| 78 | * <p> |
| 79 | * The special method |
| 80 | * {@link SecurityManager#checkPermission(java.security.Permission)} |
| 81 | * determines whether an access request indicated by a specified |
| 82 | * permission should be granted or denied. The |
| 83 | * default implementation calls |
| 84 | * |
| 85 | * <pre> |
| 86 | * AccessController.checkPermission(perm); |
| 87 | * </pre> |
| 88 | * |
| 89 | * <p> |
| 90 | * If a requested access is allowed, |
| 91 | * <code>checkPermission</code> returns quietly. If denied, a |
| 92 | * <code>SecurityException</code> is thrown. |
| 93 | * <p> |
| 94 | * As of Java 2 SDK v1.2, the default implementation of each of the other |
| 95 | * <code>check</code> methods in <code>SecurityManager</code> is to |
| 96 | * call the <code>SecurityManager checkPermission</code> method |
| 97 | * to determine if the calling thread has permission to perform the requested |
| 98 | * operation. |
| 99 | * <p> |
| 100 | * Note that the <code>checkPermission</code> method with |
| 101 | * just a single permission argument always performs security checks |
| 102 | * within the context of the currently executing thread. |
| 103 | * Sometimes a security check that should be made within a given context |
| 104 | * will actually need to be done from within a |
| 105 | * <i>different</i> context (for example, from within a worker thread). |
| 106 | * The {@link SecurityManager#getSecurityContext getSecurityContext} method |
| 107 | * and the {@link SecurityManager#checkPermission(java.security.Permission, |
| 108 | * java.lang.Object) checkPermission} |
| 109 | * method that includes a context argument are provided |
| 110 | * for this situation. The |
| 111 | * <code>getSecurityContext</code> method returns a "snapshot" |
| 112 | * of the current calling context. (The default implementation |
| 113 | * returns an AccessControlContext object.) A sample call is |
| 114 | * the following: |
| 115 | * |
| 116 | * <pre> |
| 117 | * Object context = null; |
| 118 | * SecurityManager sm = System.getSecurityManager(); |
| 119 | * if (sm != null) context = sm.getSecurityContext(); |
| 120 | * </pre> |
| 121 | * |
| 122 | * <p> |
| 123 | * The <code>checkPermission</code> method |
| 124 | * that takes a context object in addition to a permission |
| 125 | * makes access decisions based on that context, |
| 126 | * rather than on that of the current execution thread. |
| 127 | * Code within a different context can thus call that method, |
| 128 | * passing the permission and the |
| 129 | * previously-saved context object. A sample call, using the |
| 130 | * SecurityManager <code>sm</code> obtained as in the previous example, |
| 131 | * is the following: |
| 132 | * |
| 133 | * <pre> |
| 134 | * if (sm != null) sm.checkPermission(permission, context); |
| 135 | * </pre> |
| 136 | * |
| 137 | * <p>Permissions fall into these categories: File, Socket, Net, |
| 138 | * Security, Runtime, Property, AWT, Reflect, and Serializable. |
| 139 | * The classes managing these various |
| 140 | * permission categories are <code>java.io.FilePermission</code>, |
| 141 | * <code>java.net.SocketPermission</code>, |
| 142 | * <code>java.net.NetPermission</code>, |
| 143 | * <code>java.security.SecurityPermission</code>, |
| 144 | * <code>java.lang.RuntimePermission</code>, |
| 145 | * <code>java.util.PropertyPermission</code>, |
| 146 | * <code>java.awt.AWTPermission</code>, |
| 147 | * <code>java.lang.reflect.ReflectPermission</code>, and |
| 148 | * <code>java.io.SerializablePermission</code>. |
| 149 | * |
| 150 | * <p>All but the first two (FilePermission and SocketPermission) are |
| 151 | * subclasses of <code>java.security.BasicPermission</code>, which itself |
| 152 | * is an abstract subclass of the |
| 153 | * top-level class for permissions, which is |
| 154 | * <code>java.security.Permission</code>. BasicPermission defines the |
| 155 | * functionality needed for all permissions that contain a name |
| 156 | * that follows the hierarchical property naming convention |
| 157 | * (for example, "exitVM", "setFactory", "queuePrintJob", etc). |
| 158 | * An asterisk |
| 159 | * may appear at the end of the name, following a ".", or by itself, to |
| 160 | * signify a wildcard match. For example: "a.*" or "*" is valid, |
| 161 | * "*a" or "a*b" is not valid. |
| 162 | * |
| 163 | * <p>FilePermission and SocketPermission are subclasses of the |
| 164 | * top-level class for permissions |
| 165 | * (<code>java.security.Permission</code>). Classes like these |
| 166 | * that have a more complicated name syntax than that used by |
| 167 | * BasicPermission subclass directly from Permission rather than from |
| 168 | * BasicPermission. For example, |
| 169 | * for a <code>java.io.FilePermission</code> object, the permission name is |
| 170 | * the path name of a file (or directory). |
| 171 | * |
| 172 | * <p>Some of the permission classes have an "actions" list that tells |
| 173 | * the actions that are permitted for the object. For example, |
| 174 | * for a <code>java.io.FilePermission</code> object, the actions list |
| 175 | * (such as "read, write") specifies which actions are granted for the |
| 176 | * specified file (or for files in the specified directory). |
| 177 | * |
| 178 | * <p>Other permission classes are for "named" permissions - |
| 179 | * ones that contain a name but no actions list; you either have the |
| 180 | * named permission or you don't. |
| 181 | * |
| 182 | * <p>Note: There is also a <code>java.security.AllPermission</code> |
| 183 | * permission that implies all permissions. It exists to simplify the work |
| 184 | * of system administrators who might need to perform multiple |
| 185 | * tasks that require all (or numerous) permissions. |
| 186 | * <p> |
| 187 | * See <a href ="../../../technotes/guides/security/permissions.html"> |
| 188 | * Permissions in the JDK</a> for permission-related information. |
| 189 | * This document includes, for example, a table listing the various SecurityManager |
| 190 | * <code>check</code> methods and the permission(s) the default |
| 191 | * implementation of each such method requires. |
| 192 | * It also contains a table of all the version 1.2 methods |
| 193 | * that require permissions, and for each such method tells |
| 194 | * which permission it requires. |
| 195 | * <p> |
| 196 | * For more information about <code>SecurityManager</code> changes made in |
| 197 | * the JDK and advice regarding porting of 1.1-style security managers, |
| 198 | * see the <a href="../../../technotes/guides/security/index.html">security documentation</a>. |
| 199 | * |
| 200 | * @author Arthur van Hoff |
| 201 | * @author Roland Schemers |
| 202 | * |
| 203 | * @see java.lang.ClassLoader |
| 204 | * @see java.lang.SecurityException |
| 205 | * @see java.lang.SecurityManager#checkTopLevelWindow(java.lang.Object) |
| 206 | * checkTopLevelWindow |
| 207 | * @see java.lang.System#getSecurityManager() getSecurityManager |
| 208 | * @see java.lang.System#setSecurityManager(java.lang.SecurityManager) |
| 209 | * setSecurityManager |
| 210 | * @see java.security.AccessController AccessController |
| 211 | * @see java.security.AccessControlContext AccessControlContext |
| 212 | * @see java.security.AccessControlException AccessControlException |
| 213 | * @see java.security.Permission |
| 214 | * @see java.security.BasicPermission |
| 215 | * @see java.io.FilePermission |
| 216 | * @see java.net.SocketPermission |
| 217 | * @see java.util.PropertyPermission |
| 218 | * @see java.lang.RuntimePermission |
| 219 | * @see java.awt.AWTPermission |
| 220 | * @see java.security.Policy Policy |
| 221 | * @see java.security.SecurityPermission SecurityPermission |
| 222 | * @see java.security.ProtectionDomain |
| 223 | * |
| 224 | * @since JDK1.0 |
| 225 | */ |
| 226 | public |
| 227 | class SecurityManager { |
| 228 | |
| 229 | /** |
| 230 | * This field is <code>true</code> if there is a security check in |
| 231 | * progress; <code>false</code> otherwise. |
| 232 | * |
| 233 | * @deprecated This type of security checking is not recommended. |
| 234 | * It is recommended that the <code>checkPermission</code> |
| 235 | * call be used instead. |
| 236 | */ |
| 237 | @Deprecated |
| 238 | protected boolean inCheck; |
| 239 | |
| 240 | /* |
| 241 | * Have we been initialized. Effective against finalizer attacks. |
| 242 | */ |
| 243 | private boolean initialized = false; |
| 244 | |
| 245 | |
| 246 | /** |
| 247 | * returns true if the current context has been granted AllPermission |
| 248 | */ |
| 249 | private boolean hasAllPermission() |
| 250 | { |
| 251 | try { |
| 252 | checkPermission(SecurityConstants.ALL_PERMISSION); |
| 253 | return true; |
| 254 | } catch (SecurityException se) { |
| 255 | return false; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Tests if there is a security check in progress. |
| 261 | * |
| 262 | * @return the value of the <code>inCheck</code> field. This field |
| 263 | * should contain <code>true</code> if a security check is |
| 264 | * in progress, |
| 265 | * <code>false</code> otherwise. |
| 266 | * @see java.lang.SecurityManager#inCheck |
| 267 | * @deprecated This type of security checking is not recommended. |
| 268 | * It is recommended that the <code>checkPermission</code> |
| 269 | * call be used instead. |
| 270 | */ |
| 271 | @Deprecated |
| 272 | public boolean getInCheck() { |
| 273 | return inCheck; |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * Constructs a new <code>SecurityManager</code>. |
| 278 | * |
| 279 | * <p> If there is a security manager already installed, this method first |
| 280 | * calls the security manager's <code>checkPermission</code> method |
| 281 | * with the <code>RuntimePermission("createSecurityManager")</code> |
| 282 | * permission to ensure the calling thread has permission to create a new |
| 283 | * security manager. |
| 284 | * This may result in throwing a <code>SecurityException</code>. |
| 285 | * |
| 286 | * @exception java.lang.SecurityException if a security manager already |
| 287 | * exists and its <code>checkPermission</code> method |
| 288 | * doesn't allow creation of a new security manager. |
| 289 | * @see java.lang.System#getSecurityManager() |
| 290 | * @see #checkPermission(java.security.Permission) checkPermission |
| 291 | * @see java.lang.RuntimePermission |
| 292 | */ |
| 293 | public SecurityManager() { |
| 294 | synchronized(SecurityManager.class) { |
| 295 | SecurityManager sm = System.getSecurityManager(); |
| 296 | if (sm != null) { |
| 297 | // ask the currently installed security manager if we |
| 298 | // can create a new one. |
| 299 | sm.checkPermission(new RuntimePermission |
| 300 | ("createSecurityManager")); |
| 301 | } |
| 302 | initialized = true; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Returns the current execution stack as an array of classes. |
| 308 | * <p> |
| 309 | * The length of the array is the number of methods on the execution |
| 310 | * stack. The element at index <code>0</code> is the class of the |
| 311 | * currently executing method, the element at index <code>1</code> is |
| 312 | * the class of that method's caller, and so on. |
| 313 | * |
| 314 | * @return the execution stack. |
| 315 | */ |
| 316 | protected native Class[] getClassContext(); |
| 317 | |
| 318 | /** |
| 319 | * Returns the class loader of the most recently executing method from |
| 320 | * a class defined using a non-system class loader. A non-system |
| 321 | * class loader is defined as being a class loader that is not equal to |
| 322 | * the system class loader (as returned |
| 323 | * by {@link ClassLoader#getSystemClassLoader}) or one of its ancestors. |
| 324 | * <p> |
| 325 | * This method will return |
| 326 | * <code>null</code> in the following three cases:<p> |
| 327 | * <ol> |
| 328 | * <li>All methods on the execution stack are from classes |
| 329 | * defined using the system class loader or one of its ancestors. |
| 330 | * |
| 331 | * <li>All methods on the execution stack up to the first |
| 332 | * "privileged" caller |
| 333 | * (see {@link java.security.AccessController#doPrivileged}) |
| 334 | * are from classes |
| 335 | * defined using the system class loader or one of its ancestors. |
| 336 | * |
| 337 | * <li> A call to <code>checkPermission</code> with |
| 338 | * <code>java.security.AllPermission</code> does not |
| 339 | * result in a SecurityException. |
| 340 | * |
| 341 | * </ol> |
| 342 | * |
| 343 | * @return the class loader of the most recent occurrence on the stack |
| 344 | * of a method from a class defined using a non-system class |
| 345 | * loader. |
| 346 | * |
| 347 | * @deprecated This type of security checking is not recommended. |
| 348 | * It is recommended that the <code>checkPermission</code> |
| 349 | * call be used instead. |
| 350 | * |
| 351 | * @see java.lang.ClassLoader#getSystemClassLoader() getSystemClassLoader |
| 352 | * @see #checkPermission(java.security.Permission) checkPermission |
| 353 | */ |
| 354 | @Deprecated |
| 355 | protected ClassLoader currentClassLoader() |
| 356 | { |
| 357 | ClassLoader cl = currentClassLoader0(); |
| 358 | if ((cl != null) && hasAllPermission()) |
| 359 | cl = null; |
| 360 | return cl; |
| 361 | } |
| 362 | |
| 363 | private native ClassLoader currentClassLoader0(); |
| 364 | |
| 365 | /** |
| 366 | * Returns the class of the most recently executing method from |
| 367 | * a class defined using a non-system class loader. A non-system |
| 368 | * class loader is defined as being a class loader that is not equal to |
| 369 | * the system class loader (as returned |
| 370 | * by {@link ClassLoader#getSystemClassLoader}) or one of its ancestors. |
| 371 | * <p> |
| 372 | * This method will return |
| 373 | * <code>null</code> in the following three cases:<p> |
| 374 | * <ol> |
| 375 | * <li>All methods on the execution stack are from classes |
| 376 | * defined using the system class loader or one of its ancestors. |
| 377 | * |
| 378 | * <li>All methods on the execution stack up to the first |
| 379 | * "privileged" caller |
| 380 | * (see {@link java.security.AccessController#doPrivileged}) |
| 381 | * are from classes |
| 382 | * defined using the system class loader or one of its ancestors. |
| 383 | * |
| 384 | * <li> A call to <code>checkPermission</code> with |
| 385 | * <code>java.security.AllPermission</code> does not |
| 386 | * result in a SecurityException. |
| 387 | * |
| 388 | * </ol> |
| 389 | * |
| 390 | * @return the class of the most recent occurrence on the stack |
| 391 | * of a method from a class defined using a non-system class |
| 392 | * loader. |
| 393 | * |
| 394 | * @deprecated This type of security checking is not recommended. |
| 395 | * It is recommended that the <code>checkPermission</code> |
| 396 | * call be used instead. |
| 397 | * |
| 398 | * @see java.lang.ClassLoader#getSystemClassLoader() getSystemClassLoader |
| 399 | * @see #checkPermission(java.security.Permission) checkPermission |
| 400 | */ |
| 401 | @Deprecated |
| 402 | protected Class<?> currentLoadedClass() { |
| 403 | Class c = currentLoadedClass0(); |
| 404 | if ((c != null) && hasAllPermission()) |
| 405 | c = null; |
| 406 | return c; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Returns the stack depth of the specified class. |
| 411 | * |
| 412 | * @param name the fully qualified name of the class to search for. |
| 413 | * @return the depth on the stack frame of the first occurrence of a |
| 414 | * method from a class with the specified name; |
| 415 | * <code>-1</code> if such a frame cannot be found. |
| 416 | * @deprecated This type of security checking is not recommended. |
| 417 | * It is recommended that the <code>checkPermission</code> |
| 418 | * call be used instead. |
| 419 | * |
| 420 | */ |
| 421 | @Deprecated |
| 422 | protected native int classDepth(String name); |
| 423 | |
| 424 | /** |
| 425 | * Returns the stack depth of the most recently executing method |
| 426 | * from a class defined using a non-system class loader. A non-system |
| 427 | * class loader is defined as being a class loader that is not equal to |
| 428 | * the system class loader (as returned |
| 429 | * by {@link ClassLoader#getSystemClassLoader}) or one of its ancestors. |
| 430 | * <p> |
| 431 | * This method will return |
| 432 | * -1 in the following three cases:<p> |
| 433 | * <ol> |
| 434 | * <li>All methods on the execution stack are from classes |
| 435 | * defined using the system class loader or one of its ancestors. |
| 436 | * |
| 437 | * <li>All methods on the execution stack up to the first |
| 438 | * "privileged" caller |
| 439 | * (see {@link java.security.AccessController#doPrivileged}) |
| 440 | * are from classes |
| 441 | * defined using the system class loader or one of its ancestors. |
| 442 | * |
| 443 | * <li> A call to <code>checkPermission</code> with |
| 444 | * <code>java.security.AllPermission</code> does not |
| 445 | * result in a SecurityException. |
| 446 | * |
| 447 | * </ol> |
| 448 | * |
| 449 | * @return the depth on the stack frame of the most recent occurrence of |
| 450 | * a method from a class defined using a non-system class loader. |
| 451 | * |
| 452 | * @deprecated This type of security checking is not recommended. |
| 453 | * It is recommended that the <code>checkPermission</code> |
| 454 | * call be used instead. |
| 455 | * |
| 456 | * @see java.lang.ClassLoader#getSystemClassLoader() getSystemClassLoader |
| 457 | * @see #checkPermission(java.security.Permission) checkPermission |
| 458 | */ |
| 459 | @Deprecated |
| 460 | protected int classLoaderDepth() |
| 461 | { |
| 462 | int depth = classLoaderDepth0(); |
| 463 | if (depth != -1) { |
| 464 | if (hasAllPermission()) |
| 465 | depth = -1; |
| 466 | else |
| 467 | depth--; // make sure we don't include ourself |
| 468 | } |
| 469 | return depth; |
| 470 | } |
| 471 | |
| 472 | private native int classLoaderDepth0(); |
| 473 | |
| 474 | /** |
| 475 | * Tests if a method from a class with the specified |
| 476 | * name is on the execution stack. |
| 477 | * |
| 478 | * @param name the fully qualified name of the class. |
| 479 | * @return <code>true</code> if a method from a class with the specified |
| 480 | * name is on the execution stack; <code>false</code> otherwise. |
| 481 | * @deprecated This type of security checking is not recommended. |
| 482 | * It is recommended that the <code>checkPermission</code> |
| 483 | * call be used instead. |
| 484 | */ |
| 485 | @Deprecated |
| 486 | protected boolean inClass(String name) { |
| 487 | return classDepth(name) >= 0; |
| 488 | } |
| 489 | |
| 490 | /** |
| 491 | * Basically, tests if a method from a class defined using a |
| 492 | * class loader is on the execution stack. |
| 493 | * |
| 494 | * @return <code>true</code> if a call to <code>currentClassLoader</code> |
| 495 | * has a non-null return value. |
| 496 | * |
| 497 | * @deprecated This type of security checking is not recommended. |
| 498 | * It is recommended that the <code>checkPermission</code> |
| 499 | * call be used instead. |
| 500 | * @see #currentClassLoader() currentClassLoader |
| 501 | */ |
| 502 | @Deprecated |
| 503 | protected boolean inClassLoader() { |
| 504 | return currentClassLoader() != null; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * Creates an object that encapsulates the current execution |
| 509 | * environment. The result of this method is used, for example, by the |
| 510 | * three-argument <code>checkConnect</code> method and by the |
| 511 | * two-argument <code>checkRead</code> method. |
| 512 | * These methods are needed because a trusted method may be called |
| 513 | * on to read a file or open a socket on behalf of another method. |
| 514 | * The trusted method needs to determine if the other (possibly |
| 515 | * untrusted) method would be allowed to perform the operation on its |
| 516 | * own. |
| 517 | * <p> The default implementation of this method is to return |
| 518 | * an <code>AccessControlContext</code> object. |
| 519 | * |
| 520 | * @return an implementation-dependent object that encapsulates |
| 521 | * sufficient information about the current execution environment |
| 522 | * to perform some security checks later. |
| 523 | * @see java.lang.SecurityManager#checkConnect(java.lang.String, int, |
| 524 | * java.lang.Object) checkConnect |
| 525 | * @see java.lang.SecurityManager#checkRead(java.lang.String, |
| 526 | * java.lang.Object) checkRead |
| 527 | * @see java.security.AccessControlContext AccessControlContext |
| 528 | */ |
| 529 | public Object getSecurityContext() { |
| 530 | return AccessController.getContext(); |
| 531 | } |
| 532 | |
| 533 | /** |
| 534 | * Throws a <code>SecurityException</code> if the requested |
| 535 | * access, specified by the given permission, is not permitted based |
| 536 | * on the security policy currently in effect. |
| 537 | * <p> |
| 538 | * This method calls <code>AccessController.checkPermission</code> |
| 539 | * with the given permission. |
| 540 | * |
| 541 | * @param perm the requested permission. |
| 542 | * @exception SecurityException if access is not permitted based on |
| 543 | * the current security policy. |
| 544 | * @exception NullPointerException if the permission argument is |
| 545 | * <code>null</code>. |
| 546 | * @since 1.2 |
| 547 | */ |
| 548 | public void checkPermission(Permission perm) { |
| 549 | java.security.AccessController.checkPermission(perm); |
| 550 | } |
| 551 | |
| 552 | /** |
| 553 | * Throws a <code>SecurityException</code> if the |
| 554 | * specified security context is denied access to the resource |
| 555 | * specified by the given permission. |
| 556 | * The context must be a security |
| 557 | * context returned by a previous call to |
| 558 | * <code>getSecurityContext</code> and the access control |
| 559 | * decision is based upon the configured security policy for |
| 560 | * that security context. |
| 561 | * <p> |
| 562 | * If <code>context</code> is an instance of |
| 563 | * <code>AccessControlContext</code> then the |
| 564 | * <code>AccessControlContext.checkPermission</code> method is |
| 565 | * invoked with the specified permission. |
| 566 | * <p> |
| 567 | * If <code>context</code> is not an instance of |
| 568 | * <code>AccessControlContext</code> then a |
| 569 | * <code>SecurityException</code> is thrown. |
| 570 | * |
| 571 | * @param perm the specified permission |
| 572 | * @param context a system-dependent security context. |
| 573 | * @exception SecurityException if the specified security context |
| 574 | * is not an instance of <code>AccessControlContext</code> |
| 575 | * (e.g., is <code>null</code>), or is denied access to the |
| 576 | * resource specified by the given permission. |
| 577 | * @exception NullPointerException if the permission argument is |
| 578 | * <code>null</code>. |
| 579 | * @see java.lang.SecurityManager#getSecurityContext() |
| 580 | * @see java.security.AccessControlContext#checkPermission(java.security.Permission) |
| 581 | * @since 1.2 |
| 582 | */ |
| 583 | public void checkPermission(Permission perm, Object context) { |
| 584 | if (context instanceof AccessControlContext) { |
| 585 | ((AccessControlContext)context).checkPermission(perm); |
| 586 | } else { |
| 587 | throw new SecurityException(); |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * Throws a <code>SecurityException</code> if the |
| 593 | * calling thread is not allowed to create a new class loader. |
| 594 | * <p> |
| 595 | * This method calls <code>checkPermission</code> with the |
| 596 | * <code>RuntimePermission("createClassLoader")</code> |
| 597 | * permission. |
| 598 | * <p> |
| 599 | * If you override this method, then you should make a call to |
| 600 | * <code>super.checkCreateClassLoader</code> |
| 601 | * at the point the overridden method would normally throw an |
| 602 | * exception. |
| 603 | * |
| 604 | * @exception SecurityException if the calling thread does not |
| 605 | * have permission |
| 606 | * to create a new class loader. |
| 607 | * @see java.lang.ClassLoader#ClassLoader() |
| 608 | * @see #checkPermission(java.security.Permission) checkPermission |
| 609 | */ |
| 610 | public void checkCreateClassLoader() { |
| 611 | checkPermission(SecurityConstants.CREATE_CLASSLOADER_PERMISSION); |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * reference to the root thread group, used for the checkAccess |
| 616 | * methods. |
| 617 | */ |
| 618 | |
| 619 | private static ThreadGroup rootGroup = getRootGroup(); |
| 620 | |
| 621 | private static ThreadGroup getRootGroup() { |
| 622 | ThreadGroup root = Thread.currentThread().getThreadGroup(); |
| 623 | while (root.getParent() != null) { |
| 624 | root = root.getParent(); |
| 625 | } |
| 626 | return root; |
| 627 | } |
| 628 | |
| 629 | /** |
| 630 | * Throws a <code>SecurityException</code> if the |
| 631 | * calling thread is not allowed to modify the thread argument. |
| 632 | * <p> |
| 633 | * This method is invoked for the current security manager by the |
| 634 | * <code>stop</code>, <code>suspend</code>, <code>resume</code>, |
| 635 | * <code>setPriority</code>, <code>setName</code>, and |
| 636 | * <code>setDaemon</code> methods of class <code>Thread</code>. |
| 637 | * <p> |
| 638 | * If the thread argument is a system thread (belongs to |
| 639 | * the thread group with a <code>null</code> parent) then |
| 640 | * this method calls <code>checkPermission</code> with the |
| 641 | * <code>RuntimePermission("modifyThread")</code> permission. |
| 642 | * If the thread argument is <i>not</i> a system thread, |
| 643 | * this method just returns silently. |
| 644 | * <p> |
| 645 | * Applications that want a stricter policy should override this |
| 646 | * method. If this method is overridden, the method that overrides |
| 647 | * it should additionally check to see if the calling thread has the |
| 648 | * <code>RuntimePermission("modifyThread")</code> permission, and |
| 649 | * if so, return silently. This is to ensure that code granted |
| 650 | * that permission (such as the JDK itself) is allowed to |
| 651 | * manipulate any thread. |
| 652 | * <p> |
| 653 | * If this method is overridden, then |
| 654 | * <code>super.checkAccess</code> should |
| 655 | * be called by the first statement in the overridden method, or the |
| 656 | * equivalent security check should be placed in the overridden method. |
| 657 | * |
| 658 | * @param t the thread to be checked. |
| 659 | * @exception SecurityException if the calling thread does not have |
| 660 | * permission to modify the thread. |
| 661 | * @exception NullPointerException if the thread argument is |
| 662 | * <code>null</code>. |
| 663 | * @see java.lang.Thread#resume() resume |
| 664 | * @see java.lang.Thread#setDaemon(boolean) setDaemon |
| 665 | * @see java.lang.Thread#setName(java.lang.String) setName |
| 666 | * @see java.lang.Thread#setPriority(int) setPriority |
| 667 | * @see java.lang.Thread#stop() stop |
| 668 | * @see java.lang.Thread#suspend() suspend |
| 669 | * @see #checkPermission(java.security.Permission) checkPermission |
| 670 | */ |
| 671 | public void checkAccess(Thread t) { |
| 672 | if (t == null) { |
| 673 | throw new NullPointerException("thread can't be null"); |
| 674 | } |
| 675 | if (t.getThreadGroup() == rootGroup) { |
| 676 | checkPermission(SecurityConstants.MODIFY_THREAD_PERMISSION); |
| 677 | } else { |
| 678 | // just return |
| 679 | } |
| 680 | } |
| 681 | /** |
| 682 | * Throws a <code>SecurityException</code> if the |
| 683 | * calling thread is not allowed to modify the thread group argument. |
| 684 | * <p> |
| 685 | * This method is invoked for the current security manager when a |
| 686 | * new child thread or child thread group is created, and by the |
| 687 | * <code>setDaemon</code>, <code>setMaxPriority</code>, |
| 688 | * <code>stop</code>, <code>suspend</code>, <code>resume</code>, and |
| 689 | * <code>destroy</code> methods of class <code>ThreadGroup</code>. |
| 690 | * <p> |
| 691 | * If the thread group argument is the system thread group ( |
| 692 | * has a <code>null</code> parent) then |
| 693 | * this method calls <code>checkPermission</code> with the |
| 694 | * <code>RuntimePermission("modifyThreadGroup")</code> permission. |
| 695 | * If the thread group argument is <i>not</i> the system thread group, |
| 696 | * this method just returns silently. |
| 697 | * <p> |
| 698 | * Applications that want a stricter policy should override this |
| 699 | * method. If this method is overridden, the method that overrides |
| 700 | * it should additionally check to see if the calling thread has the |
| 701 | * <code>RuntimePermission("modifyThreadGroup")</code> permission, and |
| 702 | * if so, return silently. This is to ensure that code granted |
| 703 | * that permission (such as the JDK itself) is allowed to |
| 704 | * manipulate any thread. |
| 705 | * <p> |
| 706 | * If this method is overridden, then |
| 707 | * <code>super.checkAccess</code> should |
| 708 | * be called by the first statement in the overridden method, or the |
| 709 | * equivalent security check should be placed in the overridden method. |
| 710 | * |
| 711 | * @param g the thread group to be checked. |
| 712 | * @exception SecurityException if the calling thread does not have |
| 713 | * permission to modify the thread group. |
| 714 | * @exception NullPointerException if the thread group argument is |
| 715 | * <code>null</code>. |
| 716 | * @see java.lang.ThreadGroup#destroy() destroy |
| 717 | * @see java.lang.ThreadGroup#resume() resume |
| 718 | * @see java.lang.ThreadGroup#setDaemon(boolean) setDaemon |
| 719 | * @see java.lang.ThreadGroup#setMaxPriority(int) setMaxPriority |
| 720 | * @see java.lang.ThreadGroup#stop() stop |
| 721 | * @see java.lang.ThreadGroup#suspend() suspend |
| 722 | * @see #checkPermission(java.security.Permission) checkPermission |
| 723 | */ |
| 724 | public void checkAccess(ThreadGroup g) { |
| 725 | if (g == null) { |
| 726 | throw new NullPointerException("thread group can't be null"); |
| 727 | } |
| 728 | if (g == rootGroup) { |
| 729 | checkPermission(SecurityConstants.MODIFY_THREADGROUP_PERMISSION); |
| 730 | } else { |
| 731 | // just return |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | /** |
| 736 | * Throws a <code>SecurityException</code> if the |
| 737 | * calling thread is not allowed to cause the Java Virtual Machine to |
| 738 | * halt with the specified status code. |
| 739 | * <p> |
| 740 | * This method is invoked for the current security manager by the |
| 741 | * <code>exit</code> method of class <code>Runtime</code>. A status |
| 742 | * of <code>0</code> indicates success; other values indicate various |
| 743 | * errors. |
| 744 | * <p> |
| 745 | * This method calls <code>checkPermission</code> with the |
| 746 | * <code>RuntimePermission("exitVM."+status)</code> permission. |
| 747 | * <p> |
| 748 | * If you override this method, then you should make a call to |
| 749 | * <code>super.checkExit</code> |
| 750 | * at the point the overridden method would normally throw an |
| 751 | * exception. |
| 752 | * |
| 753 | * @param status the exit status. |
| 754 | * @exception SecurityException if the calling thread does not have |
| 755 | * permission to halt the Java Virtual Machine with |
| 756 | * the specified status. |
| 757 | * @see java.lang.Runtime#exit(int) exit |
| 758 | * @see #checkPermission(java.security.Permission) checkPermission |
| 759 | */ |
| 760 | public void checkExit(int status) { |
| 761 | checkPermission(new RuntimePermission("exitVM."+status)); |
| 762 | } |
| 763 | |
| 764 | /** |
| 765 | * Throws a <code>SecurityException</code> if the |
| 766 | * calling thread is not allowed to create a subprocess. |
| 767 | * <p> |
| 768 | * This method is invoked for the current security manager by the |
| 769 | * <code>exec</code> methods of class <code>Runtime</code>. |
| 770 | * <p> |
| 771 | * This method calls <code>checkPermission</code> with the |
| 772 | * <code>FilePermission(cmd,"execute")</code> permission |
| 773 | * if cmd is an absolute path, otherwise it calls |
| 774 | * <code>checkPermission</code> with |
| 775 | * <code>FilePermission("<<ALL FILES>>","execute")</code>. |
| 776 | * <p> |
| 777 | * If you override this method, then you should make a call to |
| 778 | * <code>super.checkExec</code> |
| 779 | * at the point the overridden method would normally throw an |
| 780 | * exception. |
| 781 | * |
| 782 | * @param cmd the specified system command. |
| 783 | * @exception SecurityException if the calling thread does not have |
| 784 | * permission to create a subprocess. |
| 785 | * @exception NullPointerException if the <code>cmd</code> argument is |
| 786 | * <code>null</code>. |
| 787 | * @see java.lang.Runtime#exec(java.lang.String) |
| 788 | * @see java.lang.Runtime#exec(java.lang.String, java.lang.String[]) |
| 789 | * @see java.lang.Runtime#exec(java.lang.String[]) |
| 790 | * @see java.lang.Runtime#exec(java.lang.String[], java.lang.String[]) |
| 791 | * @see #checkPermission(java.security.Permission) checkPermission |
| 792 | */ |
| 793 | public void checkExec(String cmd) { |
| 794 | File f = new File(cmd); |
| 795 | if (f.isAbsolute()) { |
| 796 | checkPermission(new FilePermission(cmd, |
| 797 | SecurityConstants.FILE_EXECUTE_ACTION)); |
| 798 | } else { |
| 799 | checkPermission(new FilePermission("<<ALL FILES>>", |
| 800 | SecurityConstants.FILE_EXECUTE_ACTION)); |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * Throws a <code>SecurityException</code> if the |
| 806 | * calling thread is not allowed to dynamic link the library code |
| 807 | * specified by the string argument file. The argument is either a |
| 808 | * simple library name or a complete filename. |
| 809 | * <p> |
| 810 | * This method is invoked for the current security manager by |
| 811 | * methods <code>load</code> and <code>loadLibrary</code> of class |
| 812 | * <code>Runtime</code>. |
| 813 | * <p> |
| 814 | * This method calls <code>checkPermission</code> with the |
| 815 | * <code>RuntimePermission("loadLibrary."+lib)</code> permission. |
| 816 | * <p> |
| 817 | * If you override this method, then you should make a call to |
| 818 | * <code>super.checkLink</code> |
| 819 | * at the point the overridden method would normally throw an |
| 820 | * exception. |
| 821 | * |
| 822 | * @param lib the name of the library. |
| 823 | * @exception SecurityException if the calling thread does not have |
| 824 | * permission to dynamically link the library. |
| 825 | * @exception NullPointerException if the <code>lib</code> argument is |
| 826 | * <code>null</code>. |
| 827 | * @see java.lang.Runtime#load(java.lang.String) |
| 828 | * @see java.lang.Runtime#loadLibrary(java.lang.String) |
| 829 | * @see #checkPermission(java.security.Permission) checkPermission |
| 830 | */ |
| 831 | public void checkLink(String lib) { |
| 832 | if (lib == null) { |
| 833 | throw new NullPointerException("library can't be null"); |
| 834 | } |
| 835 | checkPermission(new RuntimePermission("loadLibrary."+lib)); |
| 836 | } |
| 837 | |
| 838 | /** |
| 839 | * Throws a <code>SecurityException</code> if the |
| 840 | * calling thread is not allowed to read from the specified file |
| 841 | * descriptor. |
| 842 | * <p> |
| 843 | * This method calls <code>checkPermission</code> with the |
| 844 | * <code>RuntimePermission("readFileDescriptor")</code> |
| 845 | * permission. |
| 846 | * <p> |
| 847 | * If you override this method, then you should make a call to |
| 848 | * <code>super.checkRead</code> |
| 849 | * at the point the overridden method would normally throw an |
| 850 | * exception. |
| 851 | * |
| 852 | * @param fd the system-dependent file descriptor. |
| 853 | * @exception SecurityException if the calling thread does not have |
| 854 | * permission to access the specified file descriptor. |
| 855 | * @exception NullPointerException if the file descriptor argument is |
| 856 | * <code>null</code>. |
| 857 | * @see java.io.FileDescriptor |
| 858 | * @see #checkPermission(java.security.Permission) checkPermission |
| 859 | */ |
| 860 | public void checkRead(FileDescriptor fd) { |
| 861 | if (fd == null) { |
| 862 | throw new NullPointerException("file descriptor can't be null"); |
| 863 | } |
| 864 | checkPermission(new RuntimePermission("readFileDescriptor")); |
| 865 | } |
| 866 | |
| 867 | /** |
| 868 | * Throws a <code>SecurityException</code> if the |
| 869 | * calling thread is not allowed to read the file specified by the |
| 870 | * string argument. |
| 871 | * <p> |
| 872 | * This method calls <code>checkPermission</code> with the |
| 873 | * <code>FilePermission(file,"read")</code> permission. |
| 874 | * <p> |
| 875 | * If you override this method, then you should make a call to |
| 876 | * <code>super.checkRead</code> |
| 877 | * at the point the overridden method would normally throw an |
| 878 | * exception. |
| 879 | * |
| 880 | * @param file the system-dependent file name. |
| 881 | * @exception SecurityException if the calling thread does not have |
| 882 | * permission to access the specified file. |
| 883 | * @exception NullPointerException if the <code>file</code> argument is |
| 884 | * <code>null</code>. |
| 885 | * @see #checkPermission(java.security.Permission) checkPermission |
| 886 | */ |
| 887 | public void checkRead(String file) { |
| 888 | checkPermission(new FilePermission(file, |
| 889 | SecurityConstants.FILE_READ_ACTION)); |
| 890 | } |
| 891 | |
| 892 | /** |
| 893 | * Throws a <code>SecurityException</code> if the |
| 894 | * specified security context is not allowed to read the file |
| 895 | * specified by the string argument. The context must be a security |
| 896 | * context returned by a previous call to |
| 897 | * <code>getSecurityContext</code>. |
| 898 | * <p> If <code>context</code> is an instance of |
| 899 | * <code>AccessControlContext</code> then the |
| 900 | * <code>AccessControlContext.checkPermission</code> method will |
| 901 | * be invoked with the <code>FilePermission(file,"read")</code> permission. |
| 902 | * <p> If <code>context</code> is not an instance of |
| 903 | * <code>AccessControlContext</code> then a |
| 904 | * <code>SecurityException</code> is thrown. |
| 905 | * <p> |
| 906 | * If you override this method, then you should make a call to |
| 907 | * <code>super.checkRead</code> |
| 908 | * at the point the overridden method would normally throw an |
| 909 | * exception. |
| 910 | * |
| 911 | * @param file the system-dependent filename. |
| 912 | * @param context a system-dependent security context. |
| 913 | * @exception SecurityException if the specified security context |
| 914 | * is not an instance of <code>AccessControlContext</code> |
| 915 | * (e.g., is <code>null</code>), or does not have permission |
| 916 | * to read the specified file. |
| 917 | * @exception NullPointerException if the <code>file</code> argument is |
| 918 | * <code>null</code>. |
| 919 | * @see java.lang.SecurityManager#getSecurityContext() |
| 920 | * @see java.security.AccessControlContext#checkPermission(java.security.Permission) |
| 921 | */ |
| 922 | public void checkRead(String file, Object context) { |
| 923 | checkPermission( |
| 924 | new FilePermission(file, SecurityConstants.FILE_READ_ACTION), |
| 925 | context); |
| 926 | } |
| 927 | |
| 928 | /** |
| 929 | * Throws a <code>SecurityException</code> if the |
| 930 | * calling thread is not allowed to write to the specified file |
| 931 | * descriptor. |
| 932 | * <p> |
| 933 | * This method calls <code>checkPermission</code> with the |
| 934 | * <code>RuntimePermission("writeFileDescriptor")</code> |
| 935 | * permission. |
| 936 | * <p> |
| 937 | * If you override this method, then you should make a call to |
| 938 | * <code>super.checkWrite</code> |
| 939 | * at the point the overridden method would normally throw an |
| 940 | * exception. |
| 941 | * |
| 942 | * @param fd the system-dependent file descriptor. |
| 943 | * @exception SecurityException if the calling thread does not have |
| 944 | * permission to access the specified file descriptor. |
| 945 | * @exception NullPointerException if the file descriptor argument is |
| 946 | * <code>null</code>. |
| 947 | * @see java.io.FileDescriptor |
| 948 | * @see #checkPermission(java.security.Permission) checkPermission |
| 949 | */ |
| 950 | public void checkWrite(FileDescriptor fd) { |
| 951 | if (fd == null) { |
| 952 | throw new NullPointerException("file descriptor can't be null"); |
| 953 | } |
| 954 | checkPermission(new RuntimePermission("writeFileDescriptor")); |
| 955 | |
| 956 | } |
| 957 | |
| 958 | /** |
| 959 | * Throws a <code>SecurityException</code> if the |
| 960 | * calling thread is not allowed to write to the file specified by |
| 961 | * the string argument. |
| 962 | * <p> |
| 963 | * This method calls <code>checkPermission</code> with the |
| 964 | * <code>FilePermission(file,"write")</code> permission. |
| 965 | * <p> |
| 966 | * If you override this method, then you should make a call to |
| 967 | * <code>super.checkWrite</code> |
| 968 | * at the point the overridden method would normally throw an |
| 969 | * exception. |
| 970 | * |
| 971 | * @param file the system-dependent filename. |
| 972 | * @exception SecurityException if the calling thread does not |
| 973 | * have permission to access the specified file. |
| 974 | * @exception NullPointerException if the <code>file</code> argument is |
| 975 | * <code>null</code>. |
| 976 | * @see #checkPermission(java.security.Permission) checkPermission |
| 977 | */ |
| 978 | public void checkWrite(String file) { |
| 979 | checkPermission(new FilePermission(file, |
| 980 | SecurityConstants.FILE_WRITE_ACTION)); |
| 981 | } |
| 982 | |
| 983 | /** |
| 984 | * Throws a <code>SecurityException</code> if the |
| 985 | * calling thread is not allowed to delete the specified file. |
| 986 | * <p> |
| 987 | * This method is invoked for the current security manager by the |
| 988 | * <code>delete</code> method of class <code>File</code>. |
| 989 | * <p> |
| 990 | * This method calls <code>checkPermission</code> with the |
| 991 | * <code>FilePermission(file,"delete")</code> permission. |
| 992 | * <p> |
| 993 | * If you override this method, then you should make a call to |
| 994 | * <code>super.checkDelete</code> |
| 995 | * at the point the overridden method would normally throw an |
| 996 | * exception. |
| 997 | * |
| 998 | * @param file the system-dependent filename. |
| 999 | * @exception SecurityException if the calling thread does not |
| 1000 | * have permission to delete the file. |
| 1001 | * @exception NullPointerException if the <code>file</code> argument is |
| 1002 | * <code>null</code>. |
| 1003 | * @see java.io.File#delete() |
| 1004 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1005 | */ |
| 1006 | public void checkDelete(String file) { |
| 1007 | checkPermission(new FilePermission(file, |
| 1008 | SecurityConstants.FILE_DELETE_ACTION)); |
| 1009 | } |
| 1010 | |
| 1011 | /** |
| 1012 | * Throws a <code>SecurityException</code> if the |
| 1013 | * calling thread is not allowed to open a socket connection to the |
| 1014 | * specified host and port number. |
| 1015 | * <p> |
| 1016 | * A port number of <code>-1</code> indicates that the calling |
| 1017 | * method is attempting to determine the IP address of the specified |
| 1018 | * host name. |
| 1019 | * <p> |
| 1020 | * This method calls <code>checkPermission</code> with the |
| 1021 | * <code>SocketPermission(host+":"+port,"connect")</code> permission if |
| 1022 | * the port is not equal to -1. If the port is equal to -1, then |
| 1023 | * it calls <code>checkPermission</code> with the |
| 1024 | * <code>SocketPermission(host,"resolve")</code> permission. |
| 1025 | * <p> |
| 1026 | * If you override this method, then you should make a call to |
| 1027 | * <code>super.checkConnect</code> |
| 1028 | * at the point the overridden method would normally throw an |
| 1029 | * exception. |
| 1030 | * |
| 1031 | * @param host the host name port to connect to. |
| 1032 | * @param port the protocol port to connect to. |
| 1033 | * @exception SecurityException if the calling thread does not have |
| 1034 | * permission to open a socket connection to the specified |
| 1035 | * <code>host</code> and <code>port</code>. |
| 1036 | * @exception NullPointerException if the <code>host</code> argument is |
| 1037 | * <code>null</code>. |
| 1038 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1039 | */ |
| 1040 | public void checkConnect(String host, int port) { |
| 1041 | if (host == null) { |
| 1042 | throw new NullPointerException("host can't be null"); |
| 1043 | } |
| 1044 | if (!host.startsWith("[") && host.indexOf(':') != -1) { |
| 1045 | host = "[" + host + "]"; |
| 1046 | } |
| 1047 | if (port == -1) { |
| 1048 | checkPermission(new SocketPermission(host, |
| 1049 | SecurityConstants.SOCKET_RESOLVE_ACTION)); |
| 1050 | } else { |
| 1051 | checkPermission(new SocketPermission(host+":"+port, |
| 1052 | SecurityConstants.SOCKET_CONNECT_ACTION)); |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | /** |
| 1057 | * Throws a <code>SecurityException</code> if the |
| 1058 | * specified security context is not allowed to open a socket |
| 1059 | * connection to the specified host and port number. |
| 1060 | * <p> |
| 1061 | * A port number of <code>-1</code> indicates that the calling |
| 1062 | * method is attempting to determine the IP address of the specified |
| 1063 | * host name. |
| 1064 | * <p> If <code>context</code> is not an instance of |
| 1065 | * <code>AccessControlContext</code> then a |
| 1066 | * <code>SecurityException</code> is thrown. |
| 1067 | * <p> |
| 1068 | * Otherwise, the port number is checked. If it is not equal |
| 1069 | * to -1, the <code>context</code>'s <code>checkPermission</code> |
| 1070 | * method is called with a |
| 1071 | * <code>SocketPermission(host+":"+port,"connect")</code> permission. |
| 1072 | * If the port is equal to -1, then |
| 1073 | * the <code>context</code>'s <code>checkPermission</code> method |
| 1074 | * is called with a |
| 1075 | * <code>SocketPermission(host,"resolve")</code> permission. |
| 1076 | * <p> |
| 1077 | * If you override this method, then you should make a call to |
| 1078 | * <code>super.checkConnect</code> |
| 1079 | * at the point the overridden method would normally throw an |
| 1080 | * exception. |
| 1081 | * |
| 1082 | * @param host the host name port to connect to. |
| 1083 | * @param port the protocol port to connect to. |
| 1084 | * @param context a system-dependent security context. |
| 1085 | * @exception SecurityException if the specified security context |
| 1086 | * is not an instance of <code>AccessControlContext</code> |
| 1087 | * (e.g., is <code>null</code>), or does not have permission |
| 1088 | * to open a socket connection to the specified |
| 1089 | * <code>host</code> and <code>port</code>. |
| 1090 | * @exception NullPointerException if the <code>host</code> argument is |
| 1091 | * <code>null</code>. |
| 1092 | * @see java.lang.SecurityManager#getSecurityContext() |
| 1093 | * @see java.security.AccessControlContext#checkPermission(java.security.Permission) |
| 1094 | */ |
| 1095 | public void checkConnect(String host, int port, Object context) { |
| 1096 | if (host == null) { |
| 1097 | throw new NullPointerException("host can't be null"); |
| 1098 | } |
| 1099 | if (!host.startsWith("[") && host.indexOf(':') != -1) { |
| 1100 | host = "[" + host + "]"; |
| 1101 | } |
| 1102 | if (port == -1) |
| 1103 | checkPermission(new SocketPermission(host, |
| 1104 | SecurityConstants.SOCKET_RESOLVE_ACTION), |
| 1105 | context); |
| 1106 | else |
| 1107 | checkPermission(new SocketPermission(host+":"+port, |
| 1108 | SecurityConstants.SOCKET_CONNECT_ACTION), |
| 1109 | context); |
| 1110 | } |
| 1111 | |
| 1112 | /** |
| 1113 | * Throws a <code>SecurityException</code> if the |
| 1114 | * calling thread is not allowed to wait for a connection request on |
| 1115 | * the specified local port number. |
| 1116 | * <p> |
| 1117 | * If port is not 0, this method calls |
| 1118 | * <code>checkPermission</code> with the |
| 1119 | * <code>SocketPermission("localhost:"+port,"listen")</code>. |
| 1120 | * If port is zero, this method calls <code>checkPermission</code> |
| 1121 | * with <code>SocketPermission("localhost:1024-","listen").</code> |
| 1122 | * <p> |
| 1123 | * If you override this method, then you should make a call to |
| 1124 | * <code>super.checkListen</code> |
| 1125 | * at the point the overridden method would normally throw an |
| 1126 | * exception. |
| 1127 | * |
| 1128 | * @param port the local port. |
| 1129 | * @exception SecurityException if the calling thread does not have |
| 1130 | * permission to listen on the specified port. |
| 1131 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1132 | */ |
| 1133 | public void checkListen(int port) { |
| 1134 | if (port == 0) { |
| 1135 | checkPermission(SecurityConstants.LOCAL_LISTEN_PERMISSION); |
| 1136 | } else { |
| 1137 | checkPermission(new SocketPermission("localhost:"+port, |
| 1138 | SecurityConstants.SOCKET_LISTEN_ACTION)); |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | /** |
| 1143 | * Throws a <code>SecurityException</code> if the |
| 1144 | * calling thread is not permitted to accept a socket connection from |
| 1145 | * the specified host and port number. |
| 1146 | * <p> |
| 1147 | * This method is invoked for the current security manager by the |
| 1148 | * <code>accept</code> method of class <code>ServerSocket</code>. |
| 1149 | * <p> |
| 1150 | * This method calls <code>checkPermission</code> with the |
| 1151 | * <code>SocketPermission(host+":"+port,"accept")</code> permission. |
| 1152 | * <p> |
| 1153 | * If you override this method, then you should make a call to |
| 1154 | * <code>super.checkAccept</code> |
| 1155 | * at the point the overridden method would normally throw an |
| 1156 | * exception. |
| 1157 | * |
| 1158 | * @param host the host name of the socket connection. |
| 1159 | * @param port the port number of the socket connection. |
| 1160 | * @exception SecurityException if the calling thread does not have |
| 1161 | * permission to accept the connection. |
| 1162 | * @exception NullPointerException if the <code>host</code> argument is |
| 1163 | * <code>null</code>. |
| 1164 | * @see java.net.ServerSocket#accept() |
| 1165 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1166 | */ |
| 1167 | public void checkAccept(String host, int port) { |
| 1168 | if (host == null) { |
| 1169 | throw new NullPointerException("host can't be null"); |
| 1170 | } |
| 1171 | if (!host.startsWith("[") && host.indexOf(':') != -1) { |
| 1172 | host = "[" + host + "]"; |
| 1173 | } |
| 1174 | checkPermission(new SocketPermission(host+":"+port, |
| 1175 | SecurityConstants.SOCKET_ACCEPT_ACTION)); |
| 1176 | } |
| 1177 | |
| 1178 | /** |
| 1179 | * Throws a <code>SecurityException</code> if the |
| 1180 | * calling thread is not allowed to use |
| 1181 | * (join/leave/send/receive) IP multicast. |
| 1182 | * <p> |
| 1183 | * This method calls <code>checkPermission</code> with the |
| 1184 | * <code>java.net.SocketPermission(maddr.getHostAddress(), |
| 1185 | * "accept,connect")</code> permission. |
| 1186 | * <p> |
| 1187 | * If you override this method, then you should make a call to |
| 1188 | * <code>super.checkMulticast</code> |
| 1189 | * at the point the overridden method would normally throw an |
| 1190 | * exception. |
| 1191 | * |
| 1192 | * @param maddr Internet group address to be used. |
| 1193 | * @exception SecurityException if the calling thread is not allowed to |
| 1194 | * use (join/leave/send/receive) IP multicast. |
| 1195 | * @exception NullPointerException if the address argument is |
| 1196 | * <code>null</code>. |
| 1197 | * @since JDK1.1 |
| 1198 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1199 | */ |
| 1200 | public void checkMulticast(InetAddress maddr) { |
| 1201 | String host = maddr.getHostAddress(); |
| 1202 | if (!host.startsWith("[") && host.indexOf(':') != -1) { |
| 1203 | host = "[" + host + "]"; |
| 1204 | } |
| 1205 | checkPermission(new SocketPermission(host, |
| 1206 | SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION)); |
| 1207 | } |
| 1208 | |
| 1209 | /** |
| 1210 | * Throws a <code>SecurityException</code> if the |
| 1211 | * calling thread is not allowed to use |
| 1212 | * (join/leave/send/receive) IP multicast. |
| 1213 | * <p> |
| 1214 | * This method calls <code>checkPermission</code> with the |
| 1215 | * <code>java.net.SocketPermission(maddr.getHostAddress(), |
| 1216 | * "accept,connect")</code> permission. |
| 1217 | * <p> |
| 1218 | * If you override this method, then you should make a call to |
| 1219 | * <code>super.checkMulticast</code> |
| 1220 | * at the point the overridden method would normally throw an |
| 1221 | * exception. |
| 1222 | * |
| 1223 | * @param maddr Internet group address to be used. |
| 1224 | * @param ttl value in use, if it is multicast send. |
| 1225 | * Note: this particular implementation does not use the ttl |
| 1226 | * parameter. |
| 1227 | * @exception SecurityException if the calling thread is not allowed to |
| 1228 | * use (join/leave/send/receive) IP multicast. |
| 1229 | * @exception NullPointerException if the address argument is |
| 1230 | * <code>null</code>. |
| 1231 | * @since JDK1.1 |
| 1232 | * @deprecated Use #checkPermission(java.security.Permission) instead |
| 1233 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1234 | */ |
| 1235 | @Deprecated |
| 1236 | public void checkMulticast(InetAddress maddr, byte ttl) { |
| 1237 | String host = maddr.getHostAddress(); |
| 1238 | if (!host.startsWith("[") && host.indexOf(':') != -1) { |
| 1239 | host = "[" + host + "]"; |
| 1240 | } |
| 1241 | checkPermission(new SocketPermission(host, |
| 1242 | SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION)); |
| 1243 | } |
| 1244 | |
| 1245 | /** |
| 1246 | * Throws a <code>SecurityException</code> if the |
| 1247 | * calling thread is not allowed to access or modify the system |
| 1248 | * properties. |
| 1249 | * <p> |
| 1250 | * This method is used by the <code>getProperties</code> and |
| 1251 | * <code>setProperties</code> methods of class <code>System</code>. |
| 1252 | * <p> |
| 1253 | * This method calls <code>checkPermission</code> with the |
| 1254 | * <code>PropertyPermission("*", "read,write")</code> permission. |
| 1255 | * <p> |
| 1256 | * If you override this method, then you should make a call to |
| 1257 | * <code>super.checkPropertiesAccess</code> |
| 1258 | * at the point the overridden method would normally throw an |
| 1259 | * exception. |
| 1260 | * <p> |
| 1261 | * |
| 1262 | * @exception SecurityException if the calling thread does not have |
| 1263 | * permission to access or modify the system properties. |
| 1264 | * @see java.lang.System#getProperties() |
| 1265 | * @see java.lang.System#setProperties(java.util.Properties) |
| 1266 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1267 | */ |
| 1268 | public void checkPropertiesAccess() { |
| 1269 | checkPermission(new PropertyPermission("*", |
| 1270 | SecurityConstants.PROPERTY_RW_ACTION)); |
| 1271 | } |
| 1272 | |
| 1273 | /** |
| 1274 | * Throws a <code>SecurityException</code> if the |
| 1275 | * calling thread is not allowed to access the system property with |
| 1276 | * the specified <code>key</code> name. |
| 1277 | * <p> |
| 1278 | * This method is used by the <code>getProperty</code> method of |
| 1279 | * class <code>System</code>. |
| 1280 | * <p> |
| 1281 | * This method calls <code>checkPermission</code> with the |
| 1282 | * <code>PropertyPermission(key, "read")</code> permission. |
| 1283 | * <p> |
| 1284 | * <p> |
| 1285 | * If you override this method, then you should make a call to |
| 1286 | * <code>super.checkPropertyAccess</code> |
| 1287 | * at the point the overridden method would normally throw an |
| 1288 | * exception. |
| 1289 | * |
| 1290 | * @param key a system property key. |
| 1291 | * |
| 1292 | * @exception SecurityException if the calling thread does not have |
| 1293 | * permission to access the specified system property. |
| 1294 | * @exception NullPointerException if the <code>key</code> argument is |
| 1295 | * <code>null</code>. |
| 1296 | * @exception IllegalArgumentException if <code>key</code> is empty. |
| 1297 | * |
| 1298 | * @see java.lang.System#getProperty(java.lang.String) |
| 1299 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1300 | */ |
| 1301 | public void checkPropertyAccess(String key) { |
| 1302 | checkPermission(new PropertyPermission(key, |
| 1303 | SecurityConstants.PROPERTY_READ_ACTION)); |
| 1304 | } |
| 1305 | |
| 1306 | /** |
| 1307 | * Returns <code>false</code> if the calling |
| 1308 | * thread is not trusted to bring up the top-level window indicated |
| 1309 | * by the <code>window</code> argument. In this case, the caller can |
| 1310 | * still decide to show the window, but the window should include |
| 1311 | * some sort of visual warning. If the method returns |
| 1312 | * <code>true</code>, then the window can be shown without any |
| 1313 | * special restrictions. |
| 1314 | * <p> |
| 1315 | * See class <code>Window</code> for more information on trusted and |
| 1316 | * untrusted windows. |
| 1317 | * <p> |
| 1318 | * This method calls |
| 1319 | * <code>checkPermission</code> with the |
| 1320 | * <code>AWTPermission("showWindowWithoutWarningBanner")</code> permission, |
| 1321 | * and returns <code>true</code> if a SecurityException is not thrown, |
| 1322 | * otherwise it returns <code>false</code>. |
| 1323 | * <p> |
| 1324 | * If you override this method, then you should make a call to |
| 1325 | * <code>super.checkTopLevelWindow</code> |
| 1326 | * at the point the overridden method would normally return |
| 1327 | * <code>false</code>, and the value of |
| 1328 | * <code>super.checkTopLevelWindow</code> should |
| 1329 | * be returned. |
| 1330 | * |
| 1331 | * @param window the new window that is being created. |
| 1332 | * @return <code>true</code> if the calling thread is trusted to put up |
| 1333 | * top-level windows; <code>false</code> otherwise. |
| 1334 | * @exception NullPointerException if the <code>window</code> argument is |
| 1335 | * <code>null</code>. |
| 1336 | * @see java.awt.Window |
| 1337 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1338 | */ |
| 1339 | public boolean checkTopLevelWindow(Object window) { |
| 1340 | if (window == null) { |
| 1341 | throw new NullPointerException("window can't be null"); |
| 1342 | } |
| 1343 | try { |
| 1344 | checkPermission(SecurityConstants.TOPLEVEL_WINDOW_PERMISSION); |
| 1345 | return true; |
| 1346 | } catch (SecurityException se) { |
| 1347 | // just return false |
| 1348 | } |
| 1349 | return false; |
| 1350 | } |
| 1351 | |
| 1352 | /** |
| 1353 | * Throws a <code>SecurityException</code> if the |
| 1354 | * calling thread is not allowed to initiate a print job request. |
| 1355 | * <p> |
| 1356 | * This method calls |
| 1357 | * <code>checkPermission</code> with the |
| 1358 | * <code>RuntimePermission("queuePrintJob")</code> permission. |
| 1359 | * <p> |
| 1360 | * If you override this method, then you should make a call to |
| 1361 | * <code>super.checkPrintJobAccess</code> |
| 1362 | * at the point the overridden method would normally throw an |
| 1363 | * exception. |
| 1364 | * <p> |
| 1365 | * |
| 1366 | * @exception SecurityException if the calling thread does not have |
| 1367 | * permission to initiate a print job request. |
| 1368 | * @since JDK1.1 |
| 1369 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1370 | */ |
| 1371 | public void checkPrintJobAccess() { |
| 1372 | checkPermission(new RuntimePermission("queuePrintJob")); |
| 1373 | } |
| 1374 | |
| 1375 | /** |
| 1376 | * Throws a <code>SecurityException</code> if the |
| 1377 | * calling thread is not allowed to access the system clipboard. |
| 1378 | * <p> |
| 1379 | * This method calls <code>checkPermission</code> with the |
| 1380 | * <code>AWTPermission("accessClipboard")</code> |
| 1381 | * permission. |
| 1382 | * <p> |
| 1383 | * If you override this method, then you should make a call to |
| 1384 | * <code>super.checkSystemClipboardAccess</code> |
| 1385 | * at the point the overridden method would normally throw an |
| 1386 | * exception. |
| 1387 | * |
| 1388 | * @since JDK1.1 |
| 1389 | * @exception SecurityException if the calling thread does not have |
| 1390 | * permission to access the system clipboard. |
| 1391 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1392 | */ |
| 1393 | public void checkSystemClipboardAccess() { |
| 1394 | checkPermission(SecurityConstants.ACCESS_CLIPBOARD_PERMISSION); |
| 1395 | } |
| 1396 | |
| 1397 | /** |
| 1398 | * Throws a <code>SecurityException</code> if the |
| 1399 | * calling thread is not allowed to access the AWT event queue. |
| 1400 | * <p> |
| 1401 | * This method calls <code>checkPermission</code> with the |
| 1402 | * <code>AWTPermission("accessEventQueue")</code> permission. |
| 1403 | * <p> |
| 1404 | * If you override this method, then you should make a call to |
| 1405 | * <code>super.checkAwtEventQueueAccess</code> |
| 1406 | * at the point the overridden method would normally throw an |
| 1407 | * exception. |
| 1408 | * |
| 1409 | * @since JDK1.1 |
| 1410 | * @exception SecurityException if the calling thread does not have |
| 1411 | * permission to access the AWT event queue. |
| 1412 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1413 | */ |
| 1414 | public void checkAwtEventQueueAccess() { |
| 1415 | checkPermission(SecurityConstants.CHECK_AWT_EVENTQUEUE_PERMISSION); |
| 1416 | } |
| 1417 | |
| 1418 | /* |
| 1419 | * We have an initial invalid bit (initially false) for the class |
| 1420 | * variables which tell if the cache is valid. If the underlying |
| 1421 | * java.security.Security property changes via setProperty(), the |
| 1422 | * Security class uses reflection to change the variable and thus |
| 1423 | * invalidate the cache. |
| 1424 | * |
| 1425 | * Locking is handled by synchronization to the |
| 1426 | * packageAccessLock/packageDefinitionLock objects. They are only |
| 1427 | * used in this class. |
| 1428 | * |
| 1429 | * Note that cache invalidation as a result of the property change |
| 1430 | * happens without using these locks, so there may be a delay between |
| 1431 | * when a thread updates the property and when other threads updates |
| 1432 | * the cache. |
| 1433 | */ |
| 1434 | private static boolean packageAccessValid = false; |
| 1435 | private static String[] packageAccess; |
| 1436 | private static final Object packageAccessLock = new Object(); |
| 1437 | |
| 1438 | private static boolean packageDefinitionValid = false; |
| 1439 | private static String[] packageDefinition; |
| 1440 | private static final Object packageDefinitionLock = new Object(); |
| 1441 | |
| 1442 | private static String[] getPackages(String p) { |
| 1443 | String packages[] = null; |
| 1444 | if (p != null && !p.equals("")) { |
| 1445 | java.util.StringTokenizer tok = |
| 1446 | new java.util.StringTokenizer(p, ","); |
| 1447 | int n = tok.countTokens(); |
| 1448 | if (n > 0) { |
| 1449 | packages = new String[n]; |
| 1450 | int i = 0; |
| 1451 | while (tok.hasMoreElements()) { |
| 1452 | String s = tok.nextToken().trim(); |
| 1453 | packages[i++] = s; |
| 1454 | } |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | if (packages == null) |
| 1459 | packages = new String[0]; |
| 1460 | return packages; |
| 1461 | } |
| 1462 | |
| 1463 | /** |
| 1464 | * Throws a <code>SecurityException</code> if the |
| 1465 | * calling thread is not allowed to access the package specified by |
| 1466 | * the argument. |
| 1467 | * <p> |
| 1468 | * This method is used by the <code>loadClass</code> method of class |
| 1469 | * loaders. |
| 1470 | * <p> |
| 1471 | * This method first gets a list of |
| 1472 | * restricted packages by obtaining a comma-separated list from |
| 1473 | * a call to |
| 1474 | * <code>java.security.Security.getProperty("package.access")</code>, |
| 1475 | * and checks to see if <code>pkg</code> starts with or equals |
| 1476 | * any of the restricted packages. If it does, then |
| 1477 | * <code>checkPermission</code> gets called with the |
| 1478 | * <code>RuntimePermission("accessClassInPackage."+pkg)</code> |
| 1479 | * permission. |
| 1480 | * <p> |
| 1481 | * If this method is overridden, then |
| 1482 | * <code>super.checkPackageAccess</code> should be called |
| 1483 | * as the first line in the overridden method. |
| 1484 | * |
| 1485 | * @param pkg the package name. |
| 1486 | * @exception SecurityException if the calling thread does not have |
| 1487 | * permission to access the specified package. |
| 1488 | * @exception NullPointerException if the package name argument is |
| 1489 | * <code>null</code>. |
| 1490 | * @see java.lang.ClassLoader#loadClass(java.lang.String, boolean) |
| 1491 | * loadClass |
| 1492 | * @see java.security.Security#getProperty getProperty |
| 1493 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1494 | */ |
| 1495 | public void checkPackageAccess(String pkg) { |
| 1496 | if (pkg == null) { |
| 1497 | throw new NullPointerException("package name can't be null"); |
| 1498 | } |
| 1499 | |
| 1500 | String[] pkgs; |
| 1501 | synchronized (packageAccessLock) { |
| 1502 | /* |
| 1503 | * Do we need to update our property array? |
| 1504 | */ |
| 1505 | if (!packageAccessValid) { |
| 1506 | String tmpPropertyStr = |
| 1507 | AccessController.doPrivileged( |
| 1508 | new PrivilegedAction<String>() { |
| 1509 | public String run() { |
| 1510 | return java.security.Security.getProperty( |
| 1511 | "package.access"); |
| 1512 | } |
| 1513 | } |
| 1514 | ); |
| 1515 | packageAccess = getPackages(tmpPropertyStr); |
| 1516 | packageAccessValid = true; |
| 1517 | } |
| 1518 | |
| 1519 | // Using a snapshot of packageAccess -- don't care if static field |
| 1520 | // changes afterwards; array contents won't change. |
| 1521 | pkgs = packageAccess; |
| 1522 | } |
| 1523 | |
| 1524 | /* |
| 1525 | * Traverse the list of packages, check for any matches. |
| 1526 | */ |
| 1527 | for (int i = 0; i < pkgs.length; i++) { |
| 1528 | if (pkg.startsWith(pkgs[i]) || pkgs[i].equals(pkg + ".")) { |
| 1529 | checkPermission( |
| 1530 | new RuntimePermission("accessClassInPackage."+pkg)); |
| 1531 | break; // No need to continue; only need to check this once |
| 1532 | } |
| 1533 | } |
| 1534 | } |
| 1535 | |
| 1536 | /** |
| 1537 | * Throws a <code>SecurityException</code> if the |
| 1538 | * calling thread is not allowed to define classes in the package |
| 1539 | * specified by the argument. |
| 1540 | * <p> |
| 1541 | * This method is used by the <code>loadClass</code> method of some |
| 1542 | * class loaders. |
| 1543 | * <p> |
| 1544 | * This method first gets a list of restricted packages by |
| 1545 | * obtaining a comma-separated list from a call to |
| 1546 | * <code>java.security.Security.getProperty("package.definition")</code>, |
| 1547 | * and checks to see if <code>pkg</code> starts with or equals |
| 1548 | * any of the restricted packages. If it does, then |
| 1549 | * <code>checkPermission</code> gets called with the |
| 1550 | * <code>RuntimePermission("defineClassInPackage."+pkg)</code> |
| 1551 | * permission. |
| 1552 | * <p> |
| 1553 | * If this method is overridden, then |
| 1554 | * <code>super.checkPackageDefinition</code> should be called |
| 1555 | * as the first line in the overridden method. |
| 1556 | * |
| 1557 | * @param pkg the package name. |
| 1558 | * @exception SecurityException if the calling thread does not have |
| 1559 | * permission to define classes in the specified package. |
| 1560 | * @see java.lang.ClassLoader#loadClass(java.lang.String, boolean) |
| 1561 | * @see java.security.Security#getProperty getProperty |
| 1562 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1563 | */ |
| 1564 | public void checkPackageDefinition(String pkg) { |
| 1565 | if (pkg == null) { |
| 1566 | throw new NullPointerException("package name can't be null"); |
| 1567 | } |
| 1568 | |
| 1569 | String[] pkgs; |
| 1570 | synchronized (packageDefinitionLock) { |
| 1571 | /* |
| 1572 | * Do we need to update our property array? |
| 1573 | */ |
| 1574 | if (!packageDefinitionValid) { |
| 1575 | String tmpPropertyStr = |
| 1576 | AccessController.doPrivileged( |
| 1577 | new PrivilegedAction<String>() { |
| 1578 | public String run() { |
| 1579 | return java.security.Security.getProperty( |
| 1580 | "package.definition"); |
| 1581 | } |
| 1582 | } |
| 1583 | ); |
| 1584 | packageDefinition = getPackages(tmpPropertyStr); |
| 1585 | packageDefinitionValid = true; |
| 1586 | } |
| 1587 | // Using a snapshot of packageDefinition -- don't care if static |
| 1588 | // field changes afterwards; array contents won't change. |
| 1589 | pkgs = packageDefinition; |
| 1590 | } |
| 1591 | |
| 1592 | /* |
| 1593 | * Traverse the list of packages, check for any matches. |
| 1594 | */ |
| 1595 | for (int i = 0; i < pkgs.length; i++) { |
| 1596 | if (pkg.startsWith(pkgs[i]) || pkgs[i].equals(pkg + ".")) { |
| 1597 | checkPermission( |
| 1598 | new RuntimePermission("defineClassInPackage."+pkg)); |
| 1599 | break; // No need to continue; only need to check this once |
| 1600 | } |
| 1601 | } |
| 1602 | } |
| 1603 | |
| 1604 | /** |
| 1605 | * Throws a <code>SecurityException</code> if the |
| 1606 | * calling thread is not allowed to set the socket factory used by |
| 1607 | * <code>ServerSocket</code> or <code>Socket</code>, or the stream |
| 1608 | * handler factory used by <code>URL</code>. |
| 1609 | * <p> |
| 1610 | * This method calls <code>checkPermission</code> with the |
| 1611 | * <code>RuntimePermission("setFactory")</code> permission. |
| 1612 | * <p> |
| 1613 | * If you override this method, then you should make a call to |
| 1614 | * <code>super.checkSetFactory</code> |
| 1615 | * at the point the overridden method would normally throw an |
| 1616 | * exception. |
| 1617 | * <p> |
| 1618 | * |
| 1619 | * @exception SecurityException if the calling thread does not have |
| 1620 | * permission to specify a socket factory or a stream |
| 1621 | * handler factory. |
| 1622 | * |
| 1623 | * @see java.net.ServerSocket#setSocketFactory(java.net.SocketImplFactory) setSocketFactory |
| 1624 | * @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) setSocketImplFactory |
| 1625 | * @see java.net.URL#setURLStreamHandlerFactory(java.net.URLStreamHandlerFactory) setURLStreamHandlerFactory |
| 1626 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1627 | */ |
| 1628 | public void checkSetFactory() { |
| 1629 | checkPermission(new RuntimePermission("setFactory")); |
| 1630 | } |
| 1631 | |
| 1632 | /** |
| 1633 | * Throws a <code>SecurityException</code> if the |
| 1634 | * calling thread is not allowed to access members. |
| 1635 | * <p> |
| 1636 | * The default policy is to allow access to PUBLIC members, as well |
| 1637 | * as access to classes that have the same class loader as the caller. |
| 1638 | * In all other cases, this method calls <code>checkPermission</code> |
| 1639 | * with the <code>RuntimePermission("accessDeclaredMembers") |
| 1640 | * </code> permission. |
| 1641 | * <p> |
| 1642 | * If this method is overridden, then a call to |
| 1643 | * <code>super.checkMemberAccess</code> cannot be made, |
| 1644 | * as the default implementation of <code>checkMemberAccess</code> |
| 1645 | * relies on the code being checked being at a stack depth of |
| 1646 | * 4. |
| 1647 | * |
| 1648 | * @param clazz the class that reflection is to be performed on. |
| 1649 | * |
| 1650 | * @param which type of access, PUBLIC or DECLARED. |
| 1651 | * |
| 1652 | * @exception SecurityException if the caller does not have |
| 1653 | * permission to access members. |
| 1654 | * @exception NullPointerException if the <code>clazz</code> argument is |
| 1655 | * <code>null</code>. |
| 1656 | * @see java.lang.reflect.Member |
| 1657 | * @since JDK1.1 |
| 1658 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1659 | */ |
| 1660 | public void checkMemberAccess(Class<?> clazz, int which) { |
| 1661 | if (clazz == null) { |
| 1662 | throw new NullPointerException("class can't be null"); |
| 1663 | } |
| 1664 | if (which != Member.PUBLIC) { |
| 1665 | Class stack[] = getClassContext(); |
| 1666 | /* |
| 1667 | * stack depth of 4 should be the caller of one of the |
| 1668 | * methods in java.lang.Class that invoke checkMember |
| 1669 | * access. The stack should look like: |
| 1670 | * |
| 1671 | * someCaller [3] |
| 1672 | * java.lang.Class.someReflectionAPI [2] |
| 1673 | * java.lang.Class.checkMemberAccess [1] |
| 1674 | * SecurityManager.checkMemberAccess [0] |
| 1675 | * |
| 1676 | */ |
| 1677 | if ((stack.length<4) || |
| 1678 | (stack[3].getClassLoader() != clazz.getClassLoader())) { |
| 1679 | checkPermission(SecurityConstants.CHECK_MEMBER_ACCESS_PERMISSION); |
| 1680 | } |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | /** |
| 1685 | * Determines whether the permission with the specified permission target |
| 1686 | * name should be granted or denied. |
| 1687 | * |
| 1688 | * <p> If the requested permission is allowed, this method returns |
| 1689 | * quietly. If denied, a SecurityException is raised. |
| 1690 | * |
| 1691 | * <p> This method creates a <code>SecurityPermission</code> object for |
| 1692 | * the given permission target name and calls <code>checkPermission</code> |
| 1693 | * with it. |
| 1694 | * |
| 1695 | * <p> See the documentation for |
| 1696 | * <code>{@link java.security.SecurityPermission}</code> for |
| 1697 | * a list of possible permission target names. |
| 1698 | * |
| 1699 | * <p> If you override this method, then you should make a call to |
| 1700 | * <code>super.checkSecurityAccess</code> |
| 1701 | * at the point the overridden method would normally throw an |
| 1702 | * exception. |
| 1703 | * |
| 1704 | * @param target the target name of the <code>SecurityPermission</code>. |
| 1705 | * |
| 1706 | * @exception SecurityException if the calling thread does not have |
| 1707 | * permission for the requested access. |
| 1708 | * @exception NullPointerException if <code>target</code> is null. |
| 1709 | * @exception IllegalArgumentException if <code>target</code> is empty. |
| 1710 | * |
| 1711 | * @since JDK1.1 |
| 1712 | * @see #checkPermission(java.security.Permission) checkPermission |
| 1713 | */ |
| 1714 | public void checkSecurityAccess(String target) { |
| 1715 | checkPermission(new SecurityPermission(target)); |
| 1716 | } |
| 1717 | |
| 1718 | private native Class currentLoadedClass0(); |
| 1719 | |
| 1720 | /** |
| 1721 | * Returns the thread group into which to instantiate any new |
| 1722 | * thread being created at the time this is being called. |
| 1723 | * By default, it returns the thread group of the current |
| 1724 | * thread. This should be overridden by a specific security |
| 1725 | * manager to return the appropriate thread group. |
| 1726 | * |
| 1727 | * @return ThreadGroup that new threads are instantiated into |
| 1728 | * @since JDK1.1 |
| 1729 | * @see java.lang.ThreadGroup |
| 1730 | */ |
| 1731 | public ThreadGroup getThreadGroup() { |
| 1732 | return Thread.currentThread().getThreadGroup(); |
| 1733 | } |
| 1734 | |
| 1735 | } |