1 /*
2 * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.net;
27
28 import java.util.Enumeration;
29 import java.util.Vector;
30 import java.util.List;
31 import java.util.ArrayList;
32 import java.util.Collections;
33 import java.util.StringTokenizer;
34 import java.net.InetAddress;
35 import java.security.Permission;
36 import java.security.PermissionCollection;
37 import java.security.PrivilegedAction;
38 import java.security.AccessController;
39 import java.security.Security;
40 import java.security.Policy;
41 import java.io.Serializable;
42 import java.io.ObjectStreamField;
43 import java.io.ObjectOutputStream;
44 import java.io.ObjectInputStream;
45 import java.io.IOException;
46 import sun.net.util.IPAddressUtil;
47 import sun.security.util.SecurityConstants;
48 import sun.security.util.Debug;
49
50
51 /**
52 * This class represents access to a network via sockets.
53 * A SocketPermission consists of a
54 * host specification and a set of "actions" specifying ways to
55 * connect to that host. The host is specified as
56 * <pre>
57 * host = (hostname | IPv4address | iPv6reference) [:portrange]
58 * portrange = portnumber | -portnumber | portnumber-[portnumber]
59 * </pre>
60 * The host is expressed as a DNS name, as a numerical IP address,
61 * or as "localhost" (for the local machine).
62 * The wildcard "*" may be included once in a DNS name host
63 * specification. If it is included, it must be in the leftmost
64 * position, as in "*.sun.com".
65 * <p>
66 * The format of the IPv6reference should follow that specified in <a
67 * href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format
68 * for Literal IPv6 Addresses in URLs</i></a>:
69 * <pre>
70 * ipv6reference = "[" IPv6address "]"
71 *</pre>
72 * For example, you can construct a SocketPermission instance
73 * as the following:
74 * <pre>
75 * String hostAddress = inetaddress.getHostAddress();
76 * if (inetaddress instanceof Inet6Address) {
77 * sp = new SocketPermission("[" + hostAddress + "]:" + port, action);
78 * } else {
79 * sp = new SocketPermission(hostAddress + ":" + port, action);
80 * }
81 * </pre>
82 * or
83 * <pre>
84 * String host = url.getHost();
85 * sp = new SocketPermission(host + ":" + port, action);
86 * </pre>
87 * <p>
88 * The <A HREF="Inet6Address.html#lform">full uncompressed form</A> of
89 * an IPv6 literal address is also valid.
90 * <p>
91 * The port or portrange is optional. A port specification of the
92 * form "N-", where <i>N</i> is a port number, signifies all ports
93 * numbered <i>N</i> and above, while a specification of the
94 * form "-N" indicates all ports numbered <i>N</i> and below.
95 * <p>
96 * The possible ways to connect to the host are
97 * <pre>
98 * accept
99 * connect
100 * listen
101 * resolve
102 * </pre>
103 * The "listen" action is only meaningful when used with "localhost".
104 * The "resolve" action is implied when any of the other actions are present.
105 * The action "resolve" refers to host/ip name service lookups.
106 *
107 * <p>As an example of the creation and meaning of SocketPermissions,
108 * note that if the following permission:
109 *
110 * <pre>
111 * p1 = new SocketPermission("puffin.eng.sun.com:7777", "connect,accept");
112 * </pre>
113 *
114 * is granted to some code, it allows that code to connect to port 7777 on
115 * <code>puffin.eng.sun.com</code>, and to accept connections on that port.
116 *
117 * <p>Similarly, if the following permission:
118 *
119 * <pre>
120 * p1 = new SocketPermission("puffin.eng.sun.com:7777", "connect,accept");
121 * p2 = new SocketPermission("localhost:1024-", "accept,connect,listen");
122 * </pre>
123 *
124 * is granted to some code, it allows that code to
125 * accept connections on, connect to, or listen on any port between
126 * 1024 and 65535 on the local host.
127 *
128 * <p>Note: Granting code permission to accept or make connections to remote
129 * hosts may be dangerous because malevolent code can then more easily
130 * transfer and share confidential data among parties who may not
131 * otherwise have access to the data.
132 *
133 * @see java.security.Permissions
134 * @see SocketPermission
135 *
136 *
137 * @author Marianne Mueller
138 * @author Roland Schemers
139 *
140 * @serial exclude
141 */
142
143 public final class SocketPermission extends Permission
144 implements java.io.Serializable
145 {
146 private static final long serialVersionUID = -7204263841984476862L;
147
148 /**
149 * Connect to host:port
150 */
151 private final static int CONNECT = 0x1;
152
153 /**
154 * Listen on host:port
155 */
156 private final static int LISTEN = 0x2;
157
158 /**
159 * Accept a connection from host:port
160 */
161 private final static int ACCEPT = 0x4;
162
163 /**
164 * Resolve DNS queries
165 */
166 private final static int RESOLVE = 0x8;
167
168 /**
169 * No actions
170 */
171 private final static int NONE = 0x0;
172
173 /**
174 * All actions
175 */
176 private final static int ALL = CONNECT|LISTEN|ACCEPT|RESOLVE;
177
178 // various port constants
179 private static final int PORT_MIN = 0;
180 private static final int PORT_MAX = 65535;
181 private static final int PRIV_PORT_MAX = 1023;
182 private static final int DEF_EPH_LOW = 49152;
183
184 // the actions mask
185 private transient int mask;
186
187 /**
188 * the actions string.
189 *
190 * @serial
191 */
192
193 private String actions; // Left null as long as possible, then
194 // created and re-used in the getAction function.
195
196 // hostname part as it is passed
197 private transient String hostname;
198
199 // the canonical name of the host
200 // in the case of "*.foo.com", cname is ".foo.com".
201
202 private transient String cname;
203
204 // all the IP addresses of the host
205 private transient InetAddress[] addresses;
206
207 // true if the hostname is a wildcard (e.g. "*.sun.com")
208 private transient boolean wildcard;
209
210 // true if we were initialized with a single numeric IP address
211 private transient boolean init_with_ip;
212
213 // true if this SocketPermission represents an invalid/unknown host
214 // used for implies when the delayed lookup has already failed
215 private transient boolean invalid;
216
217 // port range on host
218 private transient int[] portrange;
219
220 private transient boolean defaultDeny = false;
221
222 // true if this SocketPermission represents a hostname
223 // that failed our reverse mapping heuristic test
224 private transient boolean untrusted;
225
226 // true if the trustProxy system property is set
227 private static boolean trustProxy;
228
229 // true if the sun.net.trustNameService system property is set
230 private static boolean trustNameService;
231
232 private static Debug debug = null;
233 private static boolean debugInit = false;
234
235 // ephemeral port range for this system
236 private static final int ephemeralLow = initEphemeralPorts(
237 "low", DEF_EPH_LOW
238 );
239 private static final int ephemeralHigh = initEphemeralPorts(
240 "high", PORT_MAX
241 );
242
243 static {
244 Boolean tmp = java.security.AccessController.doPrivileged(
245 new sun.security.action.GetBooleanAction("trustProxy"));
246 trustProxy = tmp.booleanValue();
247 tmp = java.security.AccessController.doPrivileged(
248 new sun.security.action.GetBooleanAction("sun.net.trustNameService"));
249 trustNameService = tmp.booleanValue();
250 }
251
252 private static synchronized Debug getDebug()
253 {
254 if (!debugInit) {
255 debug = Debug.getInstance("access");
256 debugInit = true;
257 }
258 return debug;
259 }
260
261 /**
262 * Creates a new SocketPermission object with the specified actions.
263 * The host is expressed as a DNS name, or as a numerical IP address.
264 * Optionally, a port or a portrange may be supplied (separated
265 * from the DNS name or IP address by a colon).
266 * <p>
267 * To specify the local machine, use "localhost" as the <i>host</i>.
268 * Also note: An empty <i>host</i> String ("") is equivalent to "localhost".
269 * <p>
270 * The <i>actions</i> parameter contains a comma-separated list of the
271 * actions granted for the specified host (and port(s)). Possible actions are
272 * "connect", "listen", "accept", "resolve", or
273 * any combination of those. "resolve" is automatically added
274 * when any of the other three are specified.
275 * <p>
276 * Examples of SocketPermission instantiation are the following:
277 * <pre>
278 * nr = new SocketPermission("www.catalog.com", "connect");
279 * nr = new SocketPermission("www.sun.com:80", "connect");
280 * nr = new SocketPermission("*.sun.com", "connect");
281 * nr = new SocketPermission("*.edu", "resolve");
282 * nr = new SocketPermission("204.160.241.0", "connect");
283 * nr = new SocketPermission("localhost:1024-65535", "listen");
284 * nr = new SocketPermission("204.160.241.0:1024-65535", "connect");
285 * </pre>
286 *
287 * @param host the hostname or IPaddress of the computer, optionally
288 * including a colon followed by a port or port range.
289 * @param action the action string.
290 */
291 public SocketPermission(String host, String action) {
292 super(getHost(host));
293 // name initialized to getHost(host); NPE detected in getHost()
294 init(getName(), getMask(action));
295 }
296
297
298 SocketPermission(String host, int mask) {
299 super(getHost(host));
300 // name initialized to getHost(host); NPE detected in getHost()
301 init(getName(), mask);
302 }
303
304 private void setDeny() {
305 defaultDeny = true;
306 }
307
308 private static String getHost(String host)
309 {
310 if (host.equals("")) {
311 return "localhost";
312 } else {
313 /* IPv6 literal address used in this context should follow
314 * the format specified in RFC 2732;
315 * if not, we try to solve the unambiguous case
316 */
317 int ind;
318 if (host.charAt(0) != '[') {
319 if ((ind = host.indexOf(':')) != host.lastIndexOf(':')) {
320 /* More than one ":", meaning IPv6 address is not
321 * in RFC 2732 format;
322 * We will rectify user errors for all unambiguious cases
323 */
324 StringTokenizer st = new StringTokenizer(host, ":");
325 int tokens = st.countTokens();
326 if (tokens == 9) {
327 // IPv6 address followed by port
328 ind = host.lastIndexOf(':');
329 host = "[" + host.substring(0, ind) + "]" +
330 host.substring(ind);
331 } else if (tokens == 8 && host.indexOf("::") == -1) {
332 // IPv6 address only, not followed by port
333 host = "[" + host + "]";
334 } else {
335 // could be ambiguous
336 throw new IllegalArgumentException("Ambiguous"+
337 " hostport part");
338 }
339 }
340 }
341 return host;
342 }
343 }
344
345 private int[] parsePort(String port)
346 throws Exception
347 {
348
349 if (port == null || port.equals("") || port.equals("*")) {
350 return new int[] {PORT_MIN, PORT_MAX};
351 }
352
353 int dash = port.indexOf('-');
354
355 if (dash == -1) {
356 int p = Integer.parseInt(port);
357 return new int[] {p, p};
358 } else {
359 String low = port.substring(0, dash);
360 String high = port.substring(dash+1);
361 int l,h;
362
363 if (low.equals("")) {
364 l = PORT_MIN;
365 } else {
366 l = Integer.parseInt(low);
367 }
368
369 if (high.equals("")) {
370 h = PORT_MAX;
371 } else {
372 h = Integer.parseInt(high);
373 }
374 if (l < 0 || h < 0 || h<l)
375 throw new IllegalArgumentException("invalid port range");
376
377 return new int[] {l, h};
378 }
379 }
380
381 /**
382 * Returns true if the permission has specified zero
383 * as its value (or lower bound) signifying the ephemeral range
384 */
385 private boolean includesEphemerals() {
386 return portrange[0] == 0;
387 }
388
389 /**
390 * Initialize the SocketPermission object. We don't do any DNS lookups
391 * as this point, instead we hold off until the implies method is
392 * called.
393 */
394 private void init(String host, int mask) {
395 // Set the integer mask that represents the actions
396
397 if ((mask & ALL) != mask)
398 throw new IllegalArgumentException("invalid actions mask");
399
400 // always OR in RESOLVE if we allow any of the others
401 this.mask = mask | RESOLVE;
402
403 // Parse the host name. A name has up to three components, the
404 // hostname, a port number, or two numbers representing a port
405 // range. "www.sun.com:8080-9090" is a valid host name.
406
407 // With IPv6 an address can be 2010:836B:4179::836B:4179
408 // An IPv6 address needs to be enclose in []
409 // For ex: [2010:836B:4179::836B:4179]:8080-9090
410 // Refer to RFC 2732 for more information.
411
412 int rb = 0 ;
413 int start = 0, end = 0;
414 int sep = -1;
415 String hostport = host;
416 if (host.charAt(0) == '[') {
417 start = 1;
418 rb = host.indexOf(']');
419 if (rb != -1) {
420 host = host.substring(start, rb);
421 } else {
422 throw new
423 IllegalArgumentException("invalid host/port: "+host);
424 }
425 sep = hostport.indexOf(':', rb+1);
426 } else {
427 start = 0;
428 sep = host.indexOf(':', rb);
429 end = sep;
430 if (sep != -1) {
431 host = host.substring(start, end);
432 }
433 }
434
435 if (sep != -1) {
436 String port = hostport.substring(sep+1);
437 try {
438 portrange = parsePort(port);
439 } catch (Exception e) {
440 throw new
441 IllegalArgumentException("invalid port range: "+port);
442 }
443 } else {
444 portrange = new int[] { PORT_MIN, PORT_MAX };
445 }
446
447 hostname = host;
448
449 // is this a domain wildcard specification
450 if (host.lastIndexOf('*') > 0) {
451 throw new
452 IllegalArgumentException("invalid host wildcard specification");
453 } else if (host.startsWith("*")) {
454 wildcard = true;
455 if (host.equals("*")) {
456 cname = "";
457 } else if (host.startsWith("*.")) {
458 cname = host.substring(1).toLowerCase();
459 } else {
460 throw new
461 IllegalArgumentException("invalid host wildcard specification");
462 }
463 return;
464 } else {
465 if (host.length() > 0) {
466 // see if we are being initialized with an IP address.
467 char ch = host.charAt(0);
468 if (ch == ':' || Character.digit(ch, 16) != -1) {
469 byte ip[] = IPAddressUtil.textToNumericFormatV4(host);
470 if (ip == null) {
471 ip = IPAddressUtil.textToNumericFormatV6(host);
472 }
473 if (ip != null) {
474 try {
475 addresses =
476 new InetAddress[]
477 {InetAddress.getByAddress(ip) };
478 init_with_ip = true;
479 } catch (UnknownHostException uhe) {
480 // this shouldn't happen
481 invalid = true;
482 }
483 }
484 }
485 }
486 }
487 }
488
489 /**
490 * Convert an action string to an integer actions mask.
491 *
492 * @param action the action string
493 * @return the action mask
494 */
495 private static int getMask(String action) {
496
497 if (action == null) {
498 throw new NullPointerException("action can't be null");
499 }
500
501 if (action.equals("")) {
502 throw new IllegalArgumentException("action can't be empty");
503 }
504
505 int mask = NONE;
506
507 // Check against use of constants (used heavily within the JDK)
508 if (action == SecurityConstants.SOCKET_RESOLVE_ACTION) {
509 return RESOLVE;
510 } else if (action == SecurityConstants.SOCKET_CONNECT_ACTION) {
511 return CONNECT;
512 } else if (action == SecurityConstants.SOCKET_LISTEN_ACTION) {
513 return LISTEN;
514 } else if (action == SecurityConstants.SOCKET_ACCEPT_ACTION) {
515 return ACCEPT;
516 } else if (action == SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION) {
517 return CONNECT|ACCEPT;
518 }
519
520 char[] a = action.toCharArray();
521
522 int i = a.length - 1;
523 if (i < 0)
524 return mask;
525
526 while (i != -1) {
527 char c;
528
529 // skip whitespace
530 while ((i!=-1) && ((c = a[i]) == ' ' ||
531 c == '\r' ||
532 c == '\n' ||
533 c == '\f' ||
534 c == '\t'))
535 i--;
536
537 // check for the known strings
538 int matchlen;
539
540 if (i >= 6 && (a[i-6] == 'c' || a[i-6] == 'C') &&
541 (a[i-5] == 'o' || a[i-5] == 'O') &&
542 (a[i-4] == 'n' || a[i-4] == 'N') &&
543 (a[i-3] == 'n' || a[i-3] == 'N') &&
544 (a[i-2] == 'e' || a[i-2] == 'E') &&
545 (a[i-1] == 'c' || a[i-1] == 'C') &&
546 (a[i] == 't' || a[i] == 'T'))
547 {
548 matchlen = 7;
549 mask |= CONNECT;
550
551 } else if (i >= 6 && (a[i-6] == 'r' || a[i-6] == 'R') &&
552 (a[i-5] == 'e' || a[i-5] == 'E') &&
553 (a[i-4] == 's' || a[i-4] == 'S') &&
554 (a[i-3] == 'o' || a[i-3] == 'O') &&
555 (a[i-2] == 'l' || a[i-2] == 'L') &&
556 (a[i-1] == 'v' || a[i-1] == 'V') &&
557 (a[i] == 'e' || a[i] == 'E'))
558 {
559 matchlen = 7;
560 mask |= RESOLVE;
561
562 } else if (i >= 5 && (a[i-5] == 'l' || a[i-5] == 'L') &&
563 (a[i-4] == 'i' || a[i-4] == 'I') &&
564 (a[i-3] == 's' || a[i-3] == 'S') &&
565 (a[i-2] == 't' || a[i-2] == 'T') &&
566 (a[i-1] == 'e' || a[i-1] == 'E') &&
567 (a[i] == 'n' || a[i] == 'N'))
568 {
569 matchlen = 6;
570 mask |= LISTEN;
571
572 } else if (i >= 5 && (a[i-5] == 'a' || a[i-5] == 'A') &&
573 (a[i-4] == 'c' || a[i-4] == 'C') &&
574 (a[i-3] == 'c' || a[i-3] == 'C') &&
575 (a[i-2] == 'e' || a[i-2] == 'E') &&
576 (a[i-1] == 'p' || a[i-1] == 'P') &&
577 (a[i] == 't' || a[i] == 'T'))
578 {
579 matchlen = 6;
580 mask |= ACCEPT;
581
582 } else {
583 // parse error
584 throw new IllegalArgumentException(
585 "invalid permission: " + action);
586 }
587
588 // make sure we didn't just match the tail of a word
589 // like "ackbarfaccept". Also, skip to the comma.
590 boolean seencomma = false;
591 while (i >= matchlen && !seencomma) {
592 switch(a[i-matchlen]) {
593 case ',':
594 seencomma = true;
595 /*FALLTHROUGH*/
596 case ' ': case '\r': case '\n':
597 case '\f': case '\t':
598 break;
599 default:
600 throw new IllegalArgumentException(
601 "invalid permission: " + action);
602 }
603 i--;
604 }
605
606 // point i at the location of the comma minus one (or -1).
607 i -= matchlen;
608 }
609
610 return mask;
611 }
612
613 /**
614 * attempt to get the fully qualified domain name
615 *
616 */
617 void getCanonName()
618 throws UnknownHostException
619 {
620 if (cname != null || invalid || untrusted) return;
621
622 // attempt to get the canonical name
623
624 try {
625 // first get the IP addresses if we don't have them yet
626 // this is because we need the IP address to then get
627 // FQDN.
628 if (addresses == null) {
629 getIP();
630 }
631
632 // we have to do this check, otherwise we might not
633 // get the fully qualified domain name
634 if (init_with_ip) {
635 cname = addresses[0].getHostName(false).toLowerCase();
636 } else {
637 cname = InetAddress.getByName(addresses[0].getHostAddress()).
638 getHostName(false).toLowerCase();
639 if (!trustNameService && sun.net.www.URLConnection.isProxiedHost(hostname)) {
640 if (!match(cname, hostname) &&
641 (defaultDeny || !cname.equals(addresses[0].getHostAddress()))) {
642 // Last chance
643 if (!authorized(hostname, addresses[0].getAddress())) {
644 untrusted = true;
645 Debug debug = getDebug();
646 if (debug != null && Debug.isOn("failure")) {
647 debug.println("socket access restriction: proxied host " + "(" + addresses[0] + ")" + " does not match " + cname + " from reverse lookup");
648 }
649 }
650 }
651 }
652 }
653 } catch (UnknownHostException uhe) {
654 invalid = true;
655 throw uhe;
656 }
657 }
658
659 private boolean match(String cname, String hname) {
660 String a = cname.toLowerCase();
661 String b = hname.toLowerCase();
662 if (a.startsWith(b) &&
663 ((a.length() == b.length()) || (a.charAt(b.length()) == '.')))
664 return true;
665 if (b.endsWith(".akamai.net") || b.endsWith(".akamai.com"))
666 return true;
667 String af = fragment(a);
668 String bf = fragment(b);
669 return af.length() != 0 && bf.length() != 0 && fragment(a).equals(fragment(b));
670 }
671
672 // www.sun.com. -> sun.com
673 // www.sun.co.uk -> sun.co.uk
674 // www.sun.com.au -> sun.com.au
675 private String fragment(String cname) {
676 int dot;
677 dot = cname.lastIndexOf('.');
678 if (dot == -1)
679 return cname;
680 if (dot == 0)
681 return "";
682 if (dot == cname.length() - 1) {
683 cname = cname.substring(0, cname.length() -1);
684 dot = cname.lastIndexOf('.');
685 }
686 if (dot < 1)
687 return "";
688 int second = cname.lastIndexOf('.', dot - 1);
689 if (second == -1)
690 return cname;
691 if (((cname.length() - dot) <= 3) && ((dot - second) <= 4) && second > 0) {
692 if (dot - second == 4) {
693 String s = cname.substring(second + 1, dot);
694 if (!(s.equals("com") || s.equals("org") || s.equals("edu"))) {
695 return cname.substring(second + 1);
696 }
697 }
698 int third = cname.lastIndexOf('.', second - 1);
699 if (third == -1)
700 return cname.substring(second + 1);
701 else
702 return cname.substring(third + 1);
703 }
704 return cname.substring(second + 1);
705 }
706
707 private boolean authorized(String cname, byte[] addr) {
708 if (addr.length == 4)
709 return authorizedIPv4(cname, addr);
710 else if (addr.length == 16)
711 return authorizedIPv6(cname, addr);
712 else
713 return false;
714 }
715
716 private boolean authorizedIPv4(String cname, byte[] addr) {
717 String authHost = "";
718 InetAddress auth;
719
720 try {
721 authHost = "auth." +
722 (addr[3] & 0xff) + "." + (addr[2] & 0xff) + "." +
723 (addr[1] & 0xff) + "." + (addr[0] & 0xff) +
724 ".in-addr.arpa";
725 //auth = InetAddress.getAllByName0(authHost, false)[0];
726 authHost = hostname + '.' + authHost;
727 auth = InetAddress.getAllByName0(authHost, false)[0];
728 if (auth.equals(InetAddress.getByAddress(addr)))
729 return true;
730 Debug debug = getDebug();
731 if (debug != null && Debug.isOn("failure")) {
732 debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr));
733 }
734 } catch (UnknownHostException uhe) {
735 Debug debug = getDebug();
736 if (debug != null && Debug.isOn("failure")) {
737 debug.println("socket access restriction: forward lookup failed for " + authHost);
738 }
739 } catch (IOException x) {
740 }
741 return false;
742 }
743
744 private boolean authorizedIPv6(String cname, byte[] addr) {
745 String authHost = "";
746 InetAddress auth;
747
748 try {
749 StringBuffer sb = new StringBuffer(39);
750
751 for (int i = 15; i >= 0; i--) {
752 sb.append(Integer.toHexString(((addr[i]) & 0x0f)));
753 sb.append('.');
754 sb.append(Integer.toHexString(((addr[i] >> 4) & 0x0f)));
755 sb.append('.');
756 }
757 authHost = "auth." + sb.toString() + "IP6.ARPA";
758 //auth = InetAddress.getAllByName0(authHost, false)[0];
759 authHost = hostname + '.' + authHost;
760 auth = InetAddress.getAllByName0(authHost, false)[0];
761 if (auth.equals(InetAddress.getByAddress(addr)))
762 return true;
763 Debug debug = getDebug();
764 if (debug != null && Debug.isOn("failure")) {
765 debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr));
766 }
767 } catch (UnknownHostException uhe) {
768 Debug debug = getDebug();
769 if (debug != null && Debug.isOn("failure")) {
770 debug.println("socket access restriction: forward lookup failed for " + authHost);
771 }
772 } catch (IOException x) {
773 }
774 return false;
775 }
776
777 /**
778 * get IP addresses. Sets invalid to true if we can't get them.
779 *
780 */
781 void getIP()
782 throws UnknownHostException
783 {
784 if (addresses != null || wildcard || invalid) return;
785
786 try {
787 // now get all the IP addresses
788 String host;
789 if (getName().charAt(0) == '[') {
790 // Literal IPv6 address
791 host = getName().substring(1, getName().indexOf(']'));
792 } else {
793 int i = getName().indexOf(":");
794 if (i == -1)
795 host = getName();
796 else {
797 host = getName().substring(0,i);
798 }
799 }
800
801 addresses =
802 new InetAddress[] {InetAddress.getAllByName0(host, false)[0]};
803
804 } catch (UnknownHostException uhe) {
805 invalid = true;
806 throw uhe;
807 } catch (IndexOutOfBoundsException iobe) {
808 invalid = true;
809 throw new UnknownHostException(getName());
810 }
811 }
812
813 /**
814 * Checks if this socket permission object "implies" the
815 * specified permission.
816 * <P>
817 * More specifically, this method first ensures that all of the following
818 * are true (and returns false if any of them are not):<p>
819 * <ul>
820 * <li> <i>p</i> is an instanceof SocketPermission,<p>
821 * <li> <i>p</i>'s actions are a proper subset of this
822 * object's actions, and<p>
823 * <li> <i>p</i>'s port range is included in this port range. Note:
824 * port range is ignored when p only contains the action, 'resolve'.<p>
825 * </ul>
826 *
827 * Then <code>implies</code> checks each of the following, in order,
828 * and for each returns true if the stated condition is true:<p>
829 * <ul>
830 * <li> If this object was initialized with a single IP address and one of <i>p</i>'s
831 * IP addresses is equal to this object's IP address.<p>
832 * <li>If this object is a wildcard domain (such as *.sun.com), and
833 * <i>p</i>'s canonical name (the name without any preceding *)
834 * ends with this object's canonical host name. For example, *.sun.com
835 * implies *.eng.sun.com..<p>
836 * <li>If this object was not initialized with a single IP address, and one of this
837 * object's IP addresses equals one of <i>p</i>'s IP addresses.<p>
838 * <li>If this canonical name equals <i>p</i>'s canonical name.<p>
839 * </ul>
840 *
841 * If none of the above are true, <code>implies</code> returns false.
842 * @param p the permission to check against.
843 *
844 * @return true if the specified permission is implied by this object,
845 * false if not.
846 */
847
848 public boolean implies(Permission p) {
849 int i,j;
850
851 if (!(p instanceof SocketPermission))
852 return false;
853
854 if (p == this)
855 return true;
856
857 SocketPermission that = (SocketPermission) p;
858
859 return ((this.mask & that.mask) == that.mask) &&
860 impliesIgnoreMask(that);
861 }
862
863 /**
864 * Checks if the incoming Permission's action are a proper subset of
865 * the this object's actions.
866 * <P>
867 * Check, in the following order:
868 * <ul>
869 * <li> Checks that "p" is an instanceof a SocketPermission
870 * <li> Checks that "p"'s actions are a proper subset of the
871 * current object's actions.
872 * <li> Checks that "p"'s port range is included in this port range
873 * <li> If this object was initialized with an IP address, checks that
874 * one of "p"'s IP addresses is equal to this object's IP address.
875 * <li> If either object is a wildcard domain (i.e., "*.sun.com"),
876 * attempt to match based on the wildcard.
877 * <li> If this object was not initialized with an IP address, attempt
878 * to find a match based on the IP addresses in both objects.
879 * <li> Attempt to match on the canonical hostnames of both objects.
880 * </ul>
881 * @param p the incoming permission request
882 *
883 * @return true if "permission" is a proper subset of the current object,
884 * false if not.
885 */
886
887 boolean impliesIgnoreMask(SocketPermission that) {
888 int i,j;
889
890 if ((that.mask & RESOLVE) != that.mask) {
891
892 // check simple port range
893 if ((that.portrange[0] < this.portrange[0]) ||
894 (that.portrange[1] > this.portrange[1])) {
895
896 // if either includes the ephemeral range, do full check
897 if (this.includesEphemerals() || that.includesEphemerals()) {
898 if (!inRange(this.portrange[0], this.portrange[1],
899 that.portrange[0], that.portrange[1]))
900 {
901 return false;
902 }
903 } else {
904 return false;
905 }
906 }
907 }
908
909 // allow a "*" wildcard to always match anything
910 if (this.wildcard && "".equals(this.cname))
911 return true;
912
913 // return if either one of these NetPerm objects are invalid...
914 if (this.invalid || that.invalid) {
915 return (trustProxy ? inProxyWeTrust(that) : false);
916 }
917
918
919 if (this.getName().equalsIgnoreCase(that.getName())) {
920 return true;
921 }
922
923 try {
924 if (this.init_with_ip) { // we only check IP addresses
925 if (that.wildcard)
926 return false;
927
928 if (that.init_with_ip) {
929 return (this.addresses[0].equals(that.addresses[0]));
930 } else {
931 if (that.addresses == null) {
932 that.getIP();
933 }
934 for (i=0; i < that.addresses.length; i++) {
935 if (this.addresses[0].equals(that.addresses[i]))
936 return true;
937 }
938 }
939 // since "this" was initialized with an IP address, we
940 // don't check any other cases
941 return false;
942 }
943
944 // check and see if we have any wildcards...
945 if (this.wildcard || that.wildcard) {
946 // if they are both wildcards, return true iff
947 // that's cname ends with this cname (i.e., *.sun.com
948 // implies *.eng.sun.com)
949 if (this.wildcard && that.wildcard)
950 return (that.cname.endsWith(this.cname));
951
952 // a non-wildcard can't imply a wildcard
953 if (that.wildcard)
954 return false;
955
956 // this is a wildcard, lets see if that's cname ends with
957 // it...
958 if (that.cname == null) {
959 that.getCanonName();
960 }
961 return (that.cname.endsWith(this.cname));
962 }
963
964 if (this.cname == null) {
965 this.getCanonName();
966 }
967
968 // comapare IP addresses
969 if (this.addresses == null) {
970 this.getIP();
971 }
972
973 if (that.addresses == null) {
974 that.getIP();
975 }
976
977 if (!(that.init_with_ip && this.untrusted)) {
978 for (j = 0; j < this.addresses.length; j++) {
979 for (i=0; i < that.addresses.length; i++) {
980 if (this.addresses[j].equals(that.addresses[i]))
981 return true;
982 }
983 }
984
985 // XXX: if all else fails, compare hostnames?
986 // Do we really want this?
987 if (that.cname == null) {
988 that.getCanonName();
989 }
990
991 return (this.cname.equalsIgnoreCase(that.cname));
992 }
993
994 } catch (UnknownHostException uhe) {
995 if (trustProxy)
996 return inProxyWeTrust(that);
997 }
998
999 // make sure the first thing that is done here is to return
1000 // false. If not, uncomment the return false in the above catch.
1001
1002 return false;
1003 }
1004
1005 private boolean inProxyWeTrust(SocketPermission that) {
1006 // if we trust the proxy, we see if the original names/IPs passed
1007 // in were equal.
1008
1009 String thisHost = hostname;
1010 String thatHost = that.hostname;
1011
1012 if (thisHost == null)
1013 return false;
1014 else
1015 return thisHost.equalsIgnoreCase(thatHost);
1016
1017 }
1018 /**
1019 * Checks two SocketPermission objects for equality.
1020 * <P>
1021 * @param obj the object to test for equality with this object.
1022 *
1023 * @return true if <i>obj</i> is a SocketPermission, and has the
1024 * same hostname, port range, and actions as this
1025 * SocketPermission object. However, port range will be ignored
1026 * in the comparison if <i>obj</i> only contains the action, 'resolve'.
1027 */
1028 public boolean equals(Object obj) {
1029 if (obj == this)
1030 return true;
1031
1032 if (! (obj instanceof SocketPermission))
1033 return false;
1034
1035 SocketPermission that = (SocketPermission) obj;
1036
1037 //this is (overly?) complex!!!
1038
1039 // check the mask first
1040 if (this.mask != that.mask) return false;
1041
1042 if ((that.mask & RESOLVE) != that.mask) {
1043 // now check the port range...
1044 if ((this.portrange[0] != that.portrange[0]) ||
1045 (this.portrange[1] != that.portrange[1])) {
1046 return false;
1047 }
1048 }
1049
1050 // short cut. This catches:
1051 // "crypto" equal to "crypto", or
1052 // "1.2.3.4" equal to "1.2.3.4.", or
1053 // "*.edu" equal to "*.edu", but it
1054 // does not catch "crypto" equal to
1055 // "crypto.eng.sun.com".
1056
1057 if (this.getName().equalsIgnoreCase(that.getName())) {
1058 return true;
1059 }
1060
1061 // we now attempt to get the Canonical (FQDN) name and
1062 // compare that. If this fails, about all we can do is return
1063 // false.
1064
1065 try {
1066 this.getCanonName();
1067 that.getCanonName();
1068 } catch (UnknownHostException uhe) {
1069 return false;
1070 }
1071
1072 if (this.invalid || that.invalid)
1073 return false;
1074
1075 if (this.cname != null) {
1076 return this.cname.equalsIgnoreCase(that.cname);
1077 }
1078
1079 return false;
1080 }
1081
1082 /**
1083 * Returns the hash code value for this object.
1084 *
1085 * @return a hash code value for this object.
1086 */
1087
1088 public int hashCode() {
1089 /*
1090 * If this SocketPermission was initialized with an IP address
1091 * or a wildcard, use getName().hashCode(), otherwise use
1092 * the hashCode() of the host name returned from
1093 * java.net.InetAddress.getHostName method.
1094 */
1095
1096 if (init_with_ip || wildcard) {
1097 return this.getName().hashCode();
1098 }
1099
1100 try {
1101 getCanonName();
1102 } catch (UnknownHostException uhe) {
1103
1104 }
1105
1106 if (invalid || cname == null)
1107 return this.getName().hashCode();
1108 else
1109 return this.cname.hashCode();
1110 }
1111
1112 /**
1113 * Return the current action mask.
1114 *
1115 * @return the actions mask.
1116 */
1117
1118 int getMask() {
1119 return mask;
1120 }
1121
1122 /**
1123 * Returns the "canonical string representation" of the actions in the
1124 * specified mask.
1125 * Always returns present actions in the following order:
1126 * connect, listen, accept, resolve.
1127 *
1128 * @param mask a specific integer action mask to translate into a string
1129 * @return the canonical string representation of the actions
1130 */
1131 private static String getActions(int mask)
1132 {
1133 StringBuilder sb = new StringBuilder();
1134 boolean comma = false;
1135
1136 if ((mask & CONNECT) == CONNECT) {
1137 comma = true;
1138 sb.append("connect");
1139 }
1140
1141 if ((mask & LISTEN) == LISTEN) {
1142 if (comma) sb.append(',');
1143 else comma = true;
1144 sb.append("listen");
1145 }
1146
1147 if ((mask & ACCEPT) == ACCEPT) {
1148 if (comma) sb.append(',');
1149 else comma = true;
1150 sb.append("accept");
1151 }
1152
1153
1154 if ((mask & RESOLVE) == RESOLVE) {
1155 if (comma) sb.append(',');
1156 else comma = true;
1157 sb.append("resolve");
1158 }
1159
1160 return sb.toString();
1161 }
1162
1163 /**
1164 * Returns the canonical string representation of the actions.
1165 * Always returns present actions in the following order:
1166 * connect, listen, accept, resolve.
1167 *
1168 * @return the canonical string representation of the actions.
1169 */
1170 public String getActions()
1171 {
1172 if (actions == null)
1173 actions = getActions(this.mask);
1174
1175 return actions;
1176 }
1177
1178 /**
1179 * Returns a new PermissionCollection object for storing SocketPermission
1180 * objects.
1181 * <p>
1182 * SocketPermission objects must be stored in a manner that allows them
1183 * to be inserted into the collection in any order, but that also enables the
1184 * PermissionCollection <code>implies</code>
1185 * method to be implemented in an efficient (and consistent) manner.
1186 *
1187 * @return a new PermissionCollection object suitable for storing SocketPermissions.
1188 */
1189
1190 public PermissionCollection newPermissionCollection() {
1191 return new SocketPermissionCollection();
1192 }
1193
1194 /**
1195 * WriteObject is called to save the state of the SocketPermission
1196 * to a stream. The actions are serialized, and the superclass
1197 * takes care of the name.
1198 */
1199 private synchronized void writeObject(java.io.ObjectOutputStream s)
1200 throws IOException
1201 {
1202 // Write out the actions. The superclass takes care of the name
1203 // call getActions to make sure actions field is initialized
1204 if (actions == null)
1205 getActions();
1206 s.defaultWriteObject();
1207 }
1208
1209 /**
1210 * readObject is called to restore the state of the SocketPermission from
1211 * a stream.
1212 */
1213 private synchronized void readObject(java.io.ObjectInputStream s)
1214 throws IOException, ClassNotFoundException
1215 {
1216 // Read in the action, then initialize the rest
1217 s.defaultReadObject();
1218 init(getName(),getMask(actions));
1219 }
1220
1221 /**
1222 * Check the system/security property for the ephemeral port range
1223 * for this system. The suffix is either "high" or "low"
1224 */
1225 private static int initEphemeralPorts(
1226 final String suffix, final int defval
1227 )
1228 {
1229 return AccessController.doPrivileged(
1230 new PrivilegedAction<Integer>(){
1231 public Integer run() {
1232 int val = Integer.getInteger(
1233 "jdk.net.ephemeralPortRange."+suffix, -1
1234 );
1235 if (val != -1) {
1236 return val;
1237 } else {
1238 String prop = Security.getProperty(
1239 "network.ephemeralPortRange."+suffix
1240 );
1241 try {
1242 val = Integer.parseInt(prop);
1243 } catch (NumberFormatException e) {
1244 // shouldn't happen
1245 return defval;
1246 }
1247 }
1248 return val;
1249 }
1250 }
1251 );
1252 }
1253
1254 /**
1255 * Check if the target range is within the policy range
1256 * together with the ephemeral range for this platform
1257 * (if policy includes ephemeral range)
1258 */
1259 private static boolean inRange(
1260 int policyLow, int policyHigh, int targetLow, int targetHigh
1261 )
1262 {
1263 if (targetLow == 0) {
1264 // check policy includes ephemeral range
1265 if (!inRange(policyLow, policyHigh, ephemeralLow, ephemeralHigh)) {
1266 return false;
1267 }
1268 if (targetHigh == 0) {
1269 // nothing left to do
1270 return true;
1271 }
1272 // continue check with first real port number
1273 targetLow = 1;
1274 }
1275
1276 if (policyLow == 0 && policyHigh == 0) {
1277 // ephemeral range only
1278 return targetLow >= ephemeralLow && targetHigh <= ephemeralHigh;
1279 }
1280
1281 if (policyLow != 0) {
1282 // simple check of policy only
1283 return targetLow >= policyLow && targetHigh <= policyHigh;
1284 }
1285
1286 // policyLow == 0 which means possibly two ranges to check
1287
1288 // first check if policy and ephem range overlap/contiguous
1289
1290 if (policyHigh >= ephemeralLow - 1) {
1291 return targetHigh <= ephemeralHigh;
1292 }
1293
1294 // policy and ephem range do not overlap
1295
1296 // target range must lie entirely inside policy range or eph range
1297
1298 return (targetLow <= policyHigh && targetHigh <= policyHigh) ||
1299 (targetLow >= ephemeralLow && targetHigh <= ephemeralHigh);
1300 }
1301 /*
1302 public String toString()
1303 {
1304 StringBuffer s = new StringBuffer(super.toString() + "\n" +
1305 "cname = " + cname + "\n" +
1306 "wildcard = " + wildcard + "\n" +
1307 "invalid = " + invalid + "\n" +
1308 "portrange = " + portrange[0] + "," + portrange[1] + "\n");
1309 if (addresses != null) for (int i=0; i<addresses.length; i++) {
1310 s.append( addresses[i].getHostAddress());
1311 s.append("\n");
1312 } else {
1313 s.append("(no addresses)\n");
1314 }
1315
1316 return s.toString();
1317 }
1318
1319 public static void main(String args[]) throws Exception {
1320 SocketPermission this_ = new SocketPermission(args[0], "connect");
1321 SocketPermission that_ = new SocketPermission(args[1], "connect");
1322 System.out.println("-----\n");
1323 System.out.println("this.implies(that) = " + this_.implies(that_));
1324 System.out.println("-----\n");
1325 System.out.println("this = "+this_);
1326 System.out.println("-----\n");
1327 System.out.println("that = "+that_);
1328 System.out.println("-----\n");
1329
1330 SocketPermissionCollection nps = new SocketPermissionCollection();
1331 nps.add(this_);
1332 nps.add(new SocketPermission("www-leland.stanford.edu","connect"));
1333 nps.add(new SocketPermission("www-sun.com","connect"));
1334 System.out.println("nps.implies(that) = " + nps.implies(that_));
1335 System.out.println("-----\n");
1336 }
1337 */
1338 }
1339
1340 /**
1341
1342 if (init'd with IP, key is IP as string)
1343 if wildcard, its the wild card
1344 else its the cname?
1345
1346 *
1347 * @see java.security.Permission
1348 * @see java.security.Permissions
1349 * @see java.security.PermissionCollection
1350 *
1351 *
1352 * @author Roland Schemers
1353 *
1354 * @serial include
1355 */
1356
1357 final class SocketPermissionCollection extends PermissionCollection
1358 implements Serializable
1359 {
1360 // Not serialized; see serialization section at end of class
1361 private transient List perms;
1362
1363 /**
1364 * Create an empty SocketPermissions object.
1365 *
1366 */
1367
1368 public SocketPermissionCollection() {
1369 perms = new ArrayList();
1370 }
1371
1372 /**
1373 * Adds a permission to the SocketPermissions. The key for the hash is
1374 * the name in the case of wildcards, or all the IP addresses.
1375 *
1376 * @param permission the Permission object to add.
1377 *
1378 * @exception IllegalArgumentException - if the permission is not a
1379 * SocketPermission
1380 *
1381 * @exception SecurityException - if this SocketPermissionCollection object
1382 * has been marked readonly
1383 */
1384
1385 public void add(Permission permission)
1386 {
1387 if (! (permission instanceof SocketPermission))
1388 throw new IllegalArgumentException("invalid permission: "+
1389 permission);
1390 if (isReadOnly())
1391 throw new SecurityException(
1392 "attempt to add a Permission to a readonly PermissionCollection");
1393
1394 // optimization to ensure perms most likely to be tested
1395 // show up early (4301064)
1396 synchronized (this) {
1397 perms.add(0, permission);
1398 }
1399 }
1400
1401 /**
1402 * Check and see if this collection of permissions implies the permissions
1403 * expressed in "permission".
1404 *
1405 * @param p the Permission object to compare
1406 *
1407 * @return true if "permission" is a proper subset of a permission in
1408 * the collection, false if not.
1409 */
1410
1411 public boolean implies(Permission permission)
1412 {
1413 if (! (permission instanceof SocketPermission))
1414 return false;
1415
1416 SocketPermission np = (SocketPermission) permission;
1417
1418 int desired = np.getMask();
1419 int effective = 0;
1420 int needed = desired;
1421
1422 synchronized (this) {
1423 int len = perms.size();
1424 //System.out.println("implies "+np);
1425 for (int i = 0; i < len; i++) {
1426 SocketPermission x = (SocketPermission) perms.get(i);
1427 //System.out.println(" trying "+x);
1428 if (((needed & x.getMask()) != 0) && x.impliesIgnoreMask(np)) {
1429 effective |= x.getMask();
1430 if ((effective & desired) == desired)
1431 return true;
1432 needed = (desired ^ effective);
1433 }
1434 }
1435 }
1436 return false;
1437 }
1438
1439 /**
1440 * Returns an enumeration of all the SocketPermission objects in the
1441 * container.
1442 *
1443 * @return an enumeration of all the SocketPermission objects.
1444 */
1445
1446 public Enumeration elements() {
1447 // Convert Iterator into Enumeration
1448 synchronized (this) {
1449 return Collections.enumeration(perms);
1450 }
1451 }
1452
1453 private static final long serialVersionUID = 2787186408602843674L;
1454
1455 // Need to maintain serialization interoperability with earlier releases,
1456 // which had the serializable field:
1457
1458 //
1459 // The SocketPermissions for this set.
1460 // @serial
1461 //
1462 // private Vector permissions;
1463
1464 /**
1465 * @serialField permissions java.util.Vector
1466 * A list of the SocketPermissions for this set.
1467 */
1468 private static final ObjectStreamField[] serialPersistentFields = {
1469 new ObjectStreamField("permissions", Vector.class),
1470 };
1471
1472 /**
1473 * @serialData "permissions" field (a Vector containing the SocketPermissions).
1474 */
1475 /*
1476 * Writes the contents of the perms field out as a Vector for
1477 * serialization compatibility with earlier releases.
1478 */
1479 private void writeObject(ObjectOutputStream out) throws IOException {
1480 // Don't call out.defaultWriteObject()
1481
1482 // Write out Vector
1483 Vector permissions = new Vector(perms.size());
1484
1485 synchronized (this) {
1486 permissions.addAll(perms);
1487 }
1488
1489 ObjectOutputStream.PutField pfields = out.putFields();
1490 pfields.put("permissions", permissions);
1491 out.writeFields();
1492 }
1493
1494 /*
1495 * Reads in a Vector of SocketPermissions and saves them in the perms field.
1496 */
1497 private void readObject(ObjectInputStream in) throws IOException,
1498 ClassNotFoundException {
1499 // Don't call in.defaultReadObject()
1500
1501 // Read in serialized fields
1502 ObjectInputStream.GetField gfields = in.readFields();
1503
1504 // Get the one we want
1505 Vector permissions = (Vector)gfields.get("permissions", null);
1506 perms = new ArrayList(permissions.size());
1507 perms.addAll(permissions);
1508 }
1509 }