1 /*
2 * Copyright (c) 1997, 2019, 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.io.IOException;
29 import java.io.ObjectInputStream;
30 import java.io.ObjectOutputStream;
31 import java.io.ObjectStreamField;
32 import java.io.Serializable;
33 import java.net.InetAddress;
34 import java.security.AccessController;
35 import java.security.Permission;
36 import java.security.PermissionCollection;
37 import java.security.PrivilegedAction;
38 import java.security.Security;
39 import java.util.Collections;
40 import java.util.Comparator;
41 import java.util.Enumeration;
42 import java.util.Vector;
43 import java.util.StringJoiner;
44 import java.util.StringTokenizer;
45 import java.util.concurrent.ConcurrentSkipListMap;
46 import sun.net.util.IPAddressUtil;
47 import sun.net.PortConfig;
48 import sun.security.util.RegisteredDomain;
49 import sun.security.util.SecurityConstants;
50 import sun.security.util.Debug;
51
52
53 /**
54 * This class represents access to a network via sockets.
55 * A SocketPermission consists of a
56 * host specification and a set of "actions" specifying ways to
57 * connect to that host. The host is specified as
58 * <pre>
59 * host = (hostname | IPv4address | iPv6reference) [:portrange]
60 * portrange = portnumber | -portnumber | portnumber-[portnumber]
61 * </pre>
62 * The host is expressed as a DNS name, as a numerical IP address,
63 * or as "localhost" (for the local machine).
64 * The wildcard "*" may be included once in a DNS name host
65 * specification. If it is included, it must be in the leftmost
66 * position, as in "*.example.com".
67 * <p>
68 * The format of the IPv6reference should follow that specified in <a
69 * href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format
70 * for Literal IPv6 Addresses in URLs</i></a>:
71 * <pre>
72 * ipv6reference = "[" IPv6address "]"
73 *</pre>
74 * For example, you can construct a SocketPermission instance
75 * as the following:
76 * <pre>
77 * String hostAddress = inetaddress.getHostAddress();
78 * if (inetaddress instanceof Inet6Address) {
79 * sp = new SocketPermission("[" + hostAddress + "]:" + port, action);
80 * } else {
81 * sp = new SocketPermission(hostAddress + ":" + port, action);
82 * }
83 * </pre>
84 * or
85 * <pre>
86 * String host = url.getHost();
87 * sp = new SocketPermission(host + ":" + port, action);
88 * </pre>
89 * <p>
90 * The <A HREF="Inet6Address.html#lform">full uncompressed form</A> of
91 * an IPv6 literal address is also valid.
92 * <p>
93 * The port or portrange is optional. A port specification of the
94 * form "N-", where <i>N</i> is a port number, signifies all ports
95 * numbered <i>N</i> and above, while a specification of the
96 * form "-N" indicates all ports numbered <i>N</i> and below.
97 * The special port value {@code 0} refers to the entire <i>ephemeral</i>
98 * port range. This is a fixed range of ports a system may use to
99 * allocate dynamic ports from. The actual range may be system dependent.
100 * <p>
101 * The possible ways to connect to the host are
102 * <pre>
103 * accept
104 * connect
105 * listen
106 * resolve
107 * </pre>
108 * The "listen" action is only meaningful when used with "localhost" and
109 * means the ability to bind to a specified port.
110 * The "resolve" action is implied when any of the other actions are present.
111 * The action "resolve" refers to host/ip name service lookups.
112 * <P>
113 * The actions string is converted to lowercase before processing.
114 * <p>As an example of the creation and meaning of SocketPermissions,
115 * note that if the following permission:
116 *
117 * <pre>
118 * p1 = new SocketPermission("foo.example.com:7777", "connect,accept");
119 * </pre>
120 *
121 * is granted to some code, it allows that code to connect to port 7777 on
122 * {@code foo.example.com}, and to accept connections on that port.
123 *
124 * <p>Similarly, if the following permission:
125 *
126 * <pre>
127 * p2 = new SocketPermission("localhost:1024-", "accept,connect,listen");
128 * </pre>
129 *
130 * is granted to some code, it allows that code to
131 * accept connections on, connect to, or listen on any port between
132 * 1024 and 65535 on the local host.
133 *
134 * <p>Note: Granting code permission to accept or make connections to remote
135 * hosts may be dangerous because malevolent code can then more easily
136 * transfer and share confidential data among parties who may not
137 * otherwise have access to the data.
138 *
139 * @see java.security.Permissions
140 * @see SocketPermission
141 *
142 *
143 * @author Marianne Mueller
144 * @author Roland Schemers
145 * @since 1.2
146 *
147 * @serial exclude
148 */
149
150 public final class SocketPermission extends Permission
151 implements java.io.Serializable
152 {
153 @java.io.Serial
154 private static final long serialVersionUID = -7204263841984476862L;
155
156 /**
157 * Connect to host:port
158 */
159 private static final int CONNECT = 0x1;
160
161 /**
162 * Listen on host:port
163 */
164 private static final int LISTEN = 0x2;
165
166 /**
167 * Accept a connection from host:port
168 */
169 private static final int ACCEPT = 0x4;
170
171 /**
172 * Resolve DNS queries
173 */
174 private static final int RESOLVE = 0x8;
175
176 /**
177 * No actions
178 */
179 private static final int NONE = 0x0;
180
181 /**
182 * All actions
183 */
184 private static final int ALL = CONNECT|LISTEN|ACCEPT|RESOLVE;
185
186 // various port constants
187 private static final int PORT_MIN = 0;
188 private static final int PORT_MAX = 65535;
189 private static final int PRIV_PORT_MAX = 1023;
190 private static final int DEF_EPH_LOW = 49152;
191
192 // the actions mask
193 private transient int mask;
194
195 /**
196 * the actions string.
197 *
198 * @serial
199 */
200
201 private String actions; // Left null as long as possible, then
202 // created and re-used in the getAction function.
203
204 // hostname part as it is passed
205 private transient String hostname;
206
207 // the canonical name of the host
208 // in the case of "*.foo.com", cname is ".foo.com".
209
210 private transient String cname;
211
212 // all the IP addresses of the host
213 private transient InetAddress[] addresses;
214
215 // true if the hostname is a wildcard (e.g. "*.example.com")
216 private transient boolean wildcard;
217
218 // true if we were initialized with a single numeric IP address
219 private transient boolean init_with_ip;
220
221 // true if this SocketPermission represents an invalid/unknown host
222 // used for implies when the delayed lookup has already failed
223 private transient boolean invalid;
224
225 // port range on host
226 private transient int[] portrange;
227
228 private transient boolean defaultDeny = false;
229
230 // true if this SocketPermission represents a hostname
231 // that failed our reverse mapping heuristic test
232 private transient boolean untrusted;
233 private transient boolean trusted;
234
235 // true if the sun.net.trustNameService system property is set
236 private static boolean trustNameService;
237
238 private static Debug debug = null;
239 private static boolean debugInit = false;
240
241 // lazy initializer
242 private static class EphemeralRange {
243 static final int low = initEphemeralPorts("low", DEF_EPH_LOW);
244 static final int high = initEphemeralPorts("high", PORT_MAX);
245 };
246
247 static {
248 Boolean tmp = java.security.AccessController.doPrivileged(
249 new sun.security.action.GetBooleanAction("sun.net.trustNameService"));
250 trustNameService = tmp.booleanValue();
251 }
252
253 private static synchronized Debug getDebug() {
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.example.com", "connect");
279 * nr = new SocketPermission("www.example.com:80", "connect");
280 * nr = new SocketPermission("*.example.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 IP address of the computer, optionally
288 * including a colon followed by a port or port range.
289 * @param action the action string.
290 *
291 * @throws NullPointerException if any parameters are null
292 * @throws IllegalArgumentException if the format of {@code host} is
293 * invalid, or if the {@code action} string is empty, malformed, or
294 * contains an action other than the specified possible actions
295 */
296 public SocketPermission(String host, String action) {
297 super(getHost(host));
298 // name initialized to getHost(host); NPE detected in getHost()
299 init(getName(), getMask(action));
300 }
301
302
303 SocketPermission(String host, int mask) {
304 super(getHost(host));
305 // name initialized to getHost(host); NPE detected in getHost()
306 init(getName(), mask);
307 }
308
309 private void setDeny() {
310 defaultDeny = true;
311 }
312
313 private static String getHost(String host) {
314 if (host.isEmpty()) {
315 return "localhost";
316 } else {
317 /* IPv6 literal address used in this context should follow
318 * the format specified in RFC 2732;
319 * if not, we try to solve the unambiguous case
320 */
321 int ind;
322 if (host.charAt(0) != '[') {
323 if ((ind = host.indexOf(':')) != host.lastIndexOf(':')) {
324 /* More than one ":", meaning IPv6 address is not
325 * in RFC 2732 format;
326 * We will rectify user errors for all unambiguous cases
327 */
328 StringTokenizer st = new StringTokenizer(host, ":");
329 int tokens = st.countTokens();
330 if (tokens == 9) {
331 // IPv6 address followed by port
332 ind = host.lastIndexOf(':');
333 host = "[" + host.substring(0, ind) + "]" +
334 host.substring(ind);
335 } else if (tokens == 8 && host.indexOf("::") == -1) {
336 // IPv6 address only, not followed by port
337 host = "[" + host + "]";
338 } else {
339 // could be ambiguous
340 throw new IllegalArgumentException("Ambiguous"+
341 " hostport part");
342 }
343 }
344 }
345 return host;
346 }
347 }
348
349 private int[] parsePort(String port)
350 throws Exception
351 {
352
353 if (port == null || port.isEmpty() || port.equals("*")) {
354 return new int[] {PORT_MIN, PORT_MAX};
355 }
356
357 int dash = port.indexOf('-');
358
359 if (dash == -1) {
360 int p = Integer.parseInt(port);
361 return new int[] {p, p};
362 } else {
363 String low = port.substring(0, dash);
364 String high = port.substring(dash+1);
365 int l,h;
366
367 if (low.isEmpty()) {
368 l = PORT_MIN;
369 } else {
370 l = Integer.parseInt(low);
371 }
372
373 if (high.isEmpty()) {
374 h = PORT_MAX;
375 } else {
376 h = Integer.parseInt(high);
377 }
378 if (l < 0 || h < 0 || h<l)
379 throw new IllegalArgumentException("invalid port range");
380
381 return new int[] {l, h};
382 }
383 }
384
385 /**
386 * Returns true if the permission has specified zero
387 * as its value (or lower bound) signifying the ephemeral range
388 */
389 private boolean includesEphemerals() {
390 return portrange[0] == 0;
391 }
392
393 /**
394 * Initialize the SocketPermission object. We don't do any DNS lookups
395 * as this point, instead we hold off until the implies method is
396 * called.
397 */
398 private void init(String host, int mask) {
399 // Set the integer mask that represents the actions
400
401 if ((mask & ALL) != mask)
402 throw new IllegalArgumentException("invalid actions mask");
403
404 // always OR in RESOLVE if we allow any of the others
405 this.mask = mask | RESOLVE;
406
407 // Parse the host name. A name has up to three components, the
408 // hostname, a port number, or two numbers representing a port
409 // range. "www.example.com:8080-9090" is a valid host name.
410
411 // With IPv6 an address can be 2010:836B:4179::836B:4179
412 // An IPv6 address needs to be enclose in []
413 // For ex: [2010:836B:4179::836B:4179]:8080-9090
414 // Refer to RFC 2732 for more information.
415
416 int rb = 0 ;
417 int start = 0, end = 0;
418 int sep = -1;
419 String hostport = host;
420 if (host.charAt(0) == '[') {
421 start = 1;
422 rb = host.indexOf(']');
423 if (rb != -1) {
424 host = host.substring(start, rb);
425 } else {
426 throw new
427 IllegalArgumentException("invalid host/port: "+host);
428 }
429 sep = hostport.indexOf(':', rb+1);
430 } else {
431 start = 0;
432 sep = host.indexOf(':', rb);
433 end = sep;
434 if (sep != -1) {
435 host = host.substring(start, end);
436 }
437 }
438
439 if (sep != -1) {
440 String port = hostport.substring(sep+1);
441 try {
442 portrange = parsePort(port);
443 } catch (Exception e) {
444 throw new
445 IllegalArgumentException("invalid port range: "+port);
446 }
447 } else {
448 portrange = new int[] { PORT_MIN, PORT_MAX };
449 }
450
451 hostname = host;
452
453 // is this a domain wildcard specification
454 if (host.lastIndexOf('*') > 0) {
455 throw new
456 IllegalArgumentException("invalid host wildcard specification");
457 } else if (host.startsWith("*")) {
458 wildcard = true;
459 if (host.equals("*")) {
460 cname = "";
461 } else if (host.startsWith("*.")) {
462 cname = host.substring(1).toLowerCase();
463 } else {
464 throw new
465 IllegalArgumentException("invalid host wildcard specification");
466 }
467 return;
468 } else {
469 if (!host.isEmpty()) {
470 // see if we are being initialized with an IP address.
471 char ch = host.charAt(0);
472 if (ch == ':' || Character.digit(ch, 16) != -1) {
473 byte ip[] = IPAddressUtil.textToNumericFormatV4(host);
474 if (ip == null) {
475 ip = IPAddressUtil.textToNumericFormatV6(host);
476 }
477 if (ip != null) {
478 try {
479 addresses =
480 new InetAddress[]
481 {InetAddress.getByAddress(ip) };
482 init_with_ip = true;
483 } catch (UnknownHostException uhe) {
484 // this shouldn't happen
485 invalid = true;
486 }
487 }
488 }
489 }
490 }
491 }
492
493 /**
494 * Convert an action string to an integer actions mask.
495 *
496 * @param action the action string
497 * @return the action mask
498 */
499 private static int getMask(String action) {
500
501 if (action == null) {
502 throw new NullPointerException("action can't be null");
503 }
504
505 if (action.isEmpty()) {
506 throw new IllegalArgumentException("action can't be empty");
507 }
508
509 int mask = NONE;
510
511 // Use object identity comparison against known-interned strings for
512 // performance benefit (these values are used heavily within the JDK).
513 if (action == SecurityConstants.SOCKET_RESOLVE_ACTION) {
514 return RESOLVE;
515 } else if (action == SecurityConstants.SOCKET_CONNECT_ACTION) {
516 return CONNECT;
517 } else if (action == SecurityConstants.SOCKET_LISTEN_ACTION) {
518 return LISTEN;
519 } else if (action == SecurityConstants.SOCKET_ACCEPT_ACTION) {
520 return ACCEPT;
521 } else if (action == SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION) {
522 return CONNECT|ACCEPT;
523 }
524
525 char[] a = action.toCharArray();
526
527 int i = a.length - 1;
528 if (i < 0)
529 return mask;
530
531 while (i != -1) {
532 char c;
533
534 // skip whitespace
535 while ((i!=-1) && ((c = a[i]) == ' ' ||
536 c == '\r' ||
537 c == '\n' ||
538 c == '\f' ||
539 c == '\t'))
540 i--;
541
542 // check for the known strings
543 int matchlen;
544
545 if (i >= 6 && (a[i-6] == 'c' || a[i-6] == 'C') &&
546 (a[i-5] == 'o' || a[i-5] == 'O') &&
547 (a[i-4] == 'n' || a[i-4] == 'N') &&
548 (a[i-3] == 'n' || a[i-3] == 'N') &&
549 (a[i-2] == 'e' || a[i-2] == 'E') &&
550 (a[i-1] == 'c' || a[i-1] == 'C') &&
551 (a[i] == 't' || a[i] == 'T'))
552 {
553 matchlen = 7;
554 mask |= CONNECT;
555
556 } else if (i >= 6 && (a[i-6] == 'r' || a[i-6] == 'R') &&
557 (a[i-5] == 'e' || a[i-5] == 'E') &&
558 (a[i-4] == 's' || a[i-4] == 'S') &&
559 (a[i-3] == 'o' || a[i-3] == 'O') &&
560 (a[i-2] == 'l' || a[i-2] == 'L') &&
561 (a[i-1] == 'v' || a[i-1] == 'V') &&
562 (a[i] == 'e' || a[i] == 'E'))
563 {
564 matchlen = 7;
565 mask |= RESOLVE;
566
567 } else if (i >= 5 && (a[i-5] == 'l' || a[i-5] == 'L') &&
568 (a[i-4] == 'i' || a[i-4] == 'I') &&
569 (a[i-3] == 's' || a[i-3] == 'S') &&
570 (a[i-2] == 't' || a[i-2] == 'T') &&
571 (a[i-1] == 'e' || a[i-1] == 'E') &&
572 (a[i] == 'n' || a[i] == 'N'))
573 {
574 matchlen = 6;
575 mask |= LISTEN;
576
577 } else if (i >= 5 && (a[i-5] == 'a' || a[i-5] == 'A') &&
578 (a[i-4] == 'c' || a[i-4] == 'C') &&
579 (a[i-3] == 'c' || a[i-3] == 'C') &&
580 (a[i-2] == 'e' || a[i-2] == 'E') &&
581 (a[i-1] == 'p' || a[i-1] == 'P') &&
582 (a[i] == 't' || a[i] == 'T'))
583 {
584 matchlen = 6;
585 mask |= ACCEPT;
586
587 } else {
588 // parse error
589 throw new IllegalArgumentException(
590 "invalid permission: " + action);
591 }
592
593 // make sure we didn't just match the tail of a word
594 // like "ackbarfaccept". Also, skip to the comma.
595 boolean seencomma = false;
596 while (i >= matchlen && !seencomma) {
597 switch (c = a[i-matchlen]) {
598 case ' ': case '\r': case '\n':
599 case '\f': case '\t':
600 break;
601 default:
602 if (c == ',' && i > matchlen) {
603 seencomma = true;
604 break;
605 }
606 throw new IllegalArgumentException(
607 "invalid permission: " + action);
608 }
609 i--;
610 }
611
612 // point i at the location of the comma minus one (or -1).
613 i -= matchlen;
614 }
615
616 return mask;
617 }
618
619 private boolean isUntrusted()
620 throws UnknownHostException
621 {
622 if (trusted) return false;
623 if (invalid || untrusted) return true;
624 try {
625 if (!trustNameService && (defaultDeny ||
626 sun.net.www.URLConnection.isProxiedHost(hostname))) {
627 if (this.cname == null) {
628 this.getCanonName();
629 }
630 if (!match(cname, hostname)) {
631 // Last chance
632 if (!authorized(hostname, addresses[0].getAddress())) {
633 untrusted = true;
634 Debug debug = getDebug();
635 if (debug != null && Debug.isOn("failure")) {
636 debug.println("socket access restriction: proxied host " + "(" + addresses[0] + ")" + " does not match " + cname + " from reverse lookup");
637 }
638 return true;
639 }
640 }
641 trusted = true;
642 }
643 } catch (UnknownHostException uhe) {
644 invalid = true;
645 throw uhe;
646 }
647 return false;
648 }
649
650 /**
651 * attempt to get the fully qualified domain name
652 *
653 */
654 void getCanonName()
655 throws UnknownHostException
656 {
657 if (cname != null || invalid || untrusted) return;
658
659 // attempt to get the canonical name
660
661 try {
662 // first get the IP addresses if we don't have them yet
663 // this is because we need the IP address to then get
664 // FQDN.
665 if (addresses == null) {
666 getIP();
667 }
668
669 // we have to do this check, otherwise we might not
670 // get the fully qualified domain name
671 if (init_with_ip) {
672 cname = addresses[0].getHostName(false).toLowerCase();
673 } else {
674 cname = InetAddress.getByName(addresses[0].getHostAddress()).
675 getHostName(false).toLowerCase();
676 }
677 } catch (UnknownHostException uhe) {
678 invalid = true;
679 throw uhe;
680 }
681 }
682
683 private transient String cdomain, hdomain;
684
685 /**
686 * previously we allowed domain names to be specified in IDN ACE form
687 * Need to check for that and convert to Unicode
688 */
689 private static String checkForIDN(String name) {
690 if (name.startsWith("xn--") || name.contains(".xn--")) {
691 return IDN.toUnicode(name);
692 } else {
693 return name;
694 }
695 }
696
697 private boolean match(String cname, String hname) {
698 String a = checkForIDN(cname.toLowerCase());
699 String b = checkForIDN(hname.toLowerCase());
700 if (a.startsWith(b) &&
701 ((a.length() == b.length()) || (a.charAt(b.length()) == '.'))) {
702 return true;
703 }
704 if (cdomain == null) {
705 cdomain = RegisteredDomain.from(a)
706 .map(RegisteredDomain::name)
707 .orElse(a);
708 }
709 if (hdomain == null) {
710 hdomain = RegisteredDomain.from(b)
711 .map(RegisteredDomain::name)
712 .orElse(b);
713 }
714
715 return !cdomain.isEmpty() && !hdomain.isEmpty() && cdomain.equals(hdomain);
716 }
717
718 private boolean authorized(String cname, byte[] addr) {
719 if (addr.length == 4)
720 return authorizedIPv4(cname, addr);
721 else if (addr.length == 16)
722 return authorizedIPv6(cname, addr);
723 else
724 return false;
725 }
726
727 private boolean authorizedIPv4(String cname, byte[] addr) {
728 String authHost = "";
729 InetAddress auth;
730
731 try {
732 authHost = "auth." +
733 (addr[3] & 0xff) + "." + (addr[2] & 0xff) + "." +
734 (addr[1] & 0xff) + "." + (addr[0] & 0xff) +
735 ".in-addr.arpa";
736 // Following check seems unnecessary
737 // auth = InetAddress.getAllByName0(authHost, false)[0];
738 authHost = hostname + '.' + authHost;
739 auth = InetAddress.getAllByName0(authHost, false)[0];
740 if (auth.equals(InetAddress.getByAddress(addr))) {
741 return true;
742 }
743 Debug debug = getDebug();
744 if (debug != null && Debug.isOn("failure")) {
745 debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr));
746 }
747 } catch (UnknownHostException uhe) {
748 Debug debug = getDebug();
749 if (debug != null && Debug.isOn("failure")) {
750 debug.println("socket access restriction: forward lookup failed for " + authHost);
751 }
752 }
753 return false;
754 }
755
756 private boolean authorizedIPv6(String cname, byte[] addr) {
757 String authHost = "";
758 InetAddress auth;
759
760 try {
761 StringBuilder sb = new StringBuilder(39);
762
763 for (int i = 15; i >= 0; i--) {
764 sb.append(Integer.toHexString(((addr[i]) & 0x0f)));
765 sb.append('.');
766 sb.append(Integer.toHexString(((addr[i] >> 4) & 0x0f)));
767 sb.append('.');
768 }
769 authHost = "auth." + sb.toString() + "IP6.ARPA";
770 //auth = InetAddress.getAllByName0(authHost, false)[0];
771 authHost = hostname + '.' + authHost;
772 auth = InetAddress.getAllByName0(authHost, false)[0];
773 if (auth.equals(InetAddress.getByAddress(addr)))
774 return true;
775 Debug debug = getDebug();
776 if (debug != null && Debug.isOn("failure")) {
777 debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr));
778 }
779 } catch (UnknownHostException uhe) {
780 Debug debug = getDebug();
781 if (debug != null && Debug.isOn("failure")) {
782 debug.println("socket access restriction: forward lookup failed for " + authHost);
783 }
784 }
785 return false;
786 }
787
788
789 /**
790 * get IP addresses. Sets invalid to true if we can't get them.
791 *
792 */
793 void getIP()
794 throws UnknownHostException
795 {
796 if (addresses != null || wildcard || invalid) return;
797
798 try {
799 // now get all the IP addresses
800 String host;
801 if (getName().charAt(0) == '[') {
802 // Literal IPv6 address
803 host = getName().substring(1, getName().indexOf(']'));
804 } else {
805 int i = getName().indexOf(':');
806 if (i == -1)
807 host = getName();
808 else {
809 host = getName().substring(0,i);
810 }
811 }
812
813 addresses =
814 new InetAddress[] {InetAddress.getAllByName0(host, false)[0]};
815
816 } catch (UnknownHostException uhe) {
817 invalid = true;
818 throw uhe;
819 } catch (IndexOutOfBoundsException iobe) {
820 invalid = true;
821 throw new UnknownHostException(getName());
822 }
823 }
824
825 /**
826 * Checks if this socket permission object "implies" the
827 * specified permission.
828 * <P>
829 * More specifically, this method first ensures that all of the following
830 * are true (and returns false if any of them are not):
831 * <ul>
832 * <li> <i>p</i> is an instanceof SocketPermission,
833 * <li> <i>p</i>'s actions are a proper subset of this
834 * object's actions, and
835 * <li> <i>p</i>'s port range is included in this port range. Note:
836 * port range is ignored when p only contains the action, 'resolve'.
837 * </ul>
838 *
839 * Then {@code implies} checks each of the following, in order,
840 * and for each returns true if the stated condition is true:
841 * <ul>
842 * <li> If this object was initialized with a single IP address and one of <i>p</i>'s
843 * IP addresses is equal to this object's IP address.
844 * <li>If this object is a wildcard domain (such as *.example.com), and
845 * <i>p</i>'s canonical name (the name without any preceding *)
846 * ends with this object's canonical host name. For example, *.example.com
847 * implies *.foo.example.com.
848 * <li>If this object was not initialized with a single IP address, and one of this
849 * object's IP addresses equals one of <i>p</i>'s IP addresses.
850 * <li>If this canonical name equals <i>p</i>'s canonical name.
851 * </ul>
852 *
853 * If none of the above are true, {@code implies} returns false.
854 * @param p the permission to check against.
855 *
856 * @return true if the specified permission is implied by this object,
857 * false if not.
858 */
859 @Override
860 public boolean implies(Permission p) {
861 int i,j;
862
863 if (!(p instanceof SocketPermission))
864 return false;
865
866 if (p == this)
867 return true;
868
869 SocketPermission that = (SocketPermission) p;
870
871 return ((this.mask & that.mask) == that.mask) &&
872 impliesIgnoreMask(that);
873 }
874
875 /**
876 * Checks if the incoming Permission's action are a proper subset of
877 * the this object's actions.
878 * <P>
879 * Check, in the following order:
880 * <ul>
881 * <li> Checks that "p" is an instanceof a SocketPermission
882 * <li> Checks that "p"'s actions are a proper subset of the
883 * current object's actions.
884 * <li> Checks that "p"'s port range is included in this port range
885 * <li> If this object was initialized with an IP address, checks that
886 * one of "p"'s IP addresses is equal to this object's IP address.
887 * <li> If either object is a wildcard domain (i.e., "*.example.com"),
888 * attempt to match based on the wildcard.
889 * <li> If this object was not initialized with an IP address, attempt
890 * to find a match based on the IP addresses in both objects.
891 * <li> Attempt to match on the canonical hostnames of both objects.
892 * </ul>
893 * @param that the incoming permission request
894 *
895 * @return true if "permission" is a proper subset of the current object,
896 * false if not.
897 */
898 boolean impliesIgnoreMask(SocketPermission that) {
899 int i,j;
900
901 if ((that.mask & RESOLVE) != that.mask) {
902
903 // check simple port range
904 if ((that.portrange[0] < this.portrange[0]) ||
905 (that.portrange[1] > this.portrange[1])) {
906
907 // if either includes the ephemeral range, do full check
908 if (this.includesEphemerals() || that.includesEphemerals()) {
909 if (!inRange(this.portrange[0], this.portrange[1],
910 that.portrange[0], that.portrange[1]))
911 {
912 return false;
913 }
914 } else {
915 return false;
916 }
917 }
918 }
919
920 // allow a "*" wildcard to always match anything
921 if (this.wildcard && "".equals(this.cname))
922 return true;
923
924 // return if either one of these NetPerm objects are invalid...
925 if (this.invalid || that.invalid) {
926 return compareHostnames(that);
927 }
928
929 try {
930 if (this.init_with_ip) { // we only check IP addresses
931 if (that.wildcard)
932 return false;
933
934 if (that.init_with_ip) {
935 return (this.addresses[0].equals(that.addresses[0]));
936 } else {
937 if (that.addresses == null) {
938 that.getIP();
939 }
940 for (i=0; i < that.addresses.length; i++) {
941 if (this.addresses[0].equals(that.addresses[i]))
942 return true;
943 }
944 }
945 // since "this" was initialized with an IP address, we
946 // don't check any other cases
947 return false;
948 }
949
950 // check and see if we have any wildcards...
951 if (this.wildcard || that.wildcard) {
952 // if they are both wildcards, return true iff
953 // that's cname ends with this cname (i.e., *.example.com
954 // implies *.foo.example.com)
955 if (this.wildcard && that.wildcard)
956 return (that.cname.endsWith(this.cname));
957
958 // a non-wildcard can't imply a wildcard
959 if (that.wildcard)
960 return false;
961
962 // this is a wildcard, lets see if that's cname ends with
963 // it...
964 if (that.cname == null) {
965 that.getCanonName();
966 }
967 return (that.cname.endsWith(this.cname));
968 }
969
970 // compare IP addresses
971 if (this.addresses == null) {
972 this.getIP();
973 }
974
975 if (that.addresses == null) {
976 that.getIP();
977 }
978
979 if (!(that.init_with_ip && this.isUntrusted())) {
980 for (j = 0; j < this.addresses.length; j++) {
981 for (i=0; i < that.addresses.length; i++) {
982 if (this.addresses[j].equals(that.addresses[i]))
983 return true;
984 }
985 }
986
987 // XXX: if all else fails, compare hostnames?
988 // Do we really want this?
989 if (this.cname == null) {
990 this.getCanonName();
991 }
992
993 if (that.cname == null) {
994 that.getCanonName();
995 }
996
997 return (this.cname.equalsIgnoreCase(that.cname));
998 }
999
1000 } catch (UnknownHostException uhe) {
1001 return compareHostnames(that);
1002 }
1003
1004 // make sure the first thing that is done here is to return
1005 // false. If not, uncomment the return false in the above catch.
1006
1007 return false;
1008 }
1009
1010 private boolean compareHostnames(SocketPermission that) {
1011 // we see if the original names/IPs passed in were equal.
1012
1013 String thisHost = hostname;
1014 String thatHost = that.hostname;
1015
1016 if (thisHost == null) {
1017 return false;
1018 } else if (this.wildcard) {
1019 final int cnameLength = this.cname.length();
1020 return thatHost.regionMatches(true,
1021 (thatHost.length() - cnameLength),
1022 this.cname, 0, cnameLength);
1023 } else {
1024 return thisHost.equalsIgnoreCase(thatHost);
1025 }
1026 }
1027
1028 /**
1029 * Checks two SocketPermission objects for equality.
1030 *
1031 * @param obj the object to test for equality with this object.
1032 *
1033 * @return true if <i>obj</i> is a SocketPermission, and has the
1034 * same hostname, port range, and actions as this
1035 * SocketPermission object. However, port range will be ignored
1036 * in the comparison if <i>obj</i> only contains the action, 'resolve'.
1037 */
1038 @Override
1039 public boolean equals(Object obj) {
1040 if (obj == this)
1041 return true;
1042
1043 if (! (obj instanceof SocketPermission))
1044 return false;
1045
1046 SocketPermission that = (SocketPermission) obj;
1047
1048 //this is (overly?) complex!!!
1049
1050 // check the mask first
1051 if (this.mask != that.mask) return false;
1052
1053 if ((that.mask & RESOLVE) != that.mask) {
1054 // now check the port range...
1055 if ((this.portrange[0] != that.portrange[0]) ||
1056 (this.portrange[1] != that.portrange[1])) {
1057 return false;
1058 }
1059 }
1060
1061 // short cut. This catches:
1062 // "crypto" equal to "crypto", or
1063 // "1.2.3.4" equal to "1.2.3.4.", or
1064 // "*.edu" equal to "*.edu", but it
1065 // does not catch "crypto" equal to
1066 // "crypto.foo.example.com".
1067
1068 if (this.getName().equalsIgnoreCase(that.getName())) {
1069 return true;
1070 }
1071
1072 // we now attempt to get the Canonical (FQDN) name and
1073 // compare that. If this fails, about all we can do is return
1074 // false.
1075
1076 try {
1077 this.getCanonName();
1078 that.getCanonName();
1079 } catch (UnknownHostException uhe) {
1080 return false;
1081 }
1082
1083 if (this.invalid || that.invalid)
1084 return false;
1085
1086 if (this.cname != null) {
1087 return this.cname.equalsIgnoreCase(that.cname);
1088 }
1089
1090 return false;
1091 }
1092
1093 /**
1094 * Returns the hash code value for this object.
1095 *
1096 * @return a hash code value for this object.
1097 */
1098 @Override
1099 public int hashCode() {
1100 /*
1101 * If this SocketPermission was initialized with an IP address
1102 * or a wildcard, use getName().hashCode(), otherwise use
1103 * the hashCode() of the host name returned from
1104 * java.net.InetAddress.getHostName method.
1105 */
1106
1107 if (init_with_ip || wildcard) {
1108 return this.getName().hashCode();
1109 }
1110
1111 try {
1112 getCanonName();
1113 } catch (UnknownHostException uhe) {
1114
1115 }
1116
1117 if (invalid || cname == null)
1118 return this.getName().hashCode();
1119 else
1120 return this.cname.hashCode();
1121 }
1122
1123 /**
1124 * Return the current action mask.
1125 *
1126 * @return the actions mask.
1127 */
1128
1129 int getMask() {
1130 return mask;
1131 }
1132
1133 /**
1134 * Returns the "canonical string representation" of the actions in the
1135 * specified mask.
1136 * Always returns present actions in the following order:
1137 * connect, listen, accept, resolve.
1138 *
1139 * @param mask a specific integer action mask to translate into a string
1140 * @return the canonical string representation of the actions
1141 */
1142 private static String getActions(int mask) {
1143 StringJoiner sj = new StringJoiner(",");
1144 if ((mask & CONNECT) == CONNECT) {
1145 sj.add("connect");
1146 }
1147 if ((mask & LISTEN) == LISTEN) {
1148 sj.add("listen");
1149 }
1150 if ((mask & ACCEPT) == ACCEPT) {
1151 sj.add("accept");
1152 }
1153 if ((mask & RESOLVE) == RESOLVE) {
1154 sj.add("resolve");
1155 }
1156 return sj.toString();
1157 }
1158
1159 /**
1160 * Returns the canonical string representation of the actions.
1161 * Always returns present actions in the following order:
1162 * connect, listen, accept, resolve.
1163 *
1164 * @return the canonical string representation of the actions.
1165 */
1166 @Override
1167 public String getActions()
1168 {
1169 if (actions == null)
1170 actions = getActions(this.mask);
1171
1172 return actions;
1173 }
1174
1175 /**
1176 * Returns a new PermissionCollection object for storing SocketPermission
1177 * objects.
1178 * <p>
1179 * SocketPermission objects must be stored in a manner that allows them
1180 * to be inserted into the collection in any order, but that also enables the
1181 * PermissionCollection {@code implies}
1182 * method to be implemented in an efficient (and consistent) manner.
1183 *
1184 * @return a new PermissionCollection object suitable for storing SocketPermissions.
1185 */
1186 @Override
1187 public PermissionCollection newPermissionCollection() {
1188 return new SocketPermissionCollection();
1189 }
1190
1191 /**
1192 * WriteObject is called to save the state of the SocketPermission
1193 * to a stream. The actions are serialized, and the superclass
1194 * takes care of the name.
1195 */
1196 @java.io.Serial
1197 private synchronized void writeObject(java.io.ObjectOutputStream s)
1198 throws IOException
1199 {
1200 // Write out the actions. The superclass takes care of the name
1201 // call getActions to make sure actions field is initialized
1202 if (actions == null)
1203 getActions();
1204 s.defaultWriteObject();
1205 }
1206
1207 /**
1208 * readObject is called to restore the state of the SocketPermission from
1209 * a stream.
1210 */
1211 @java.io.Serial
1212 private synchronized void readObject(java.io.ObjectInputStream s)
1213 throws IOException, ClassNotFoundException
1214 {
1215 // Read in the action, then initialize the rest
1216 s.defaultReadObject();
1217 init(getName(),getMask(actions));
1218 }
1219
1220 /**
1221 * Check the system/security property for the ephemeral port range
1222 * for this system. The suffix is either "high" or "low"
1223 */
1224 private static int initEphemeralPorts(String suffix, int defval) {
1225 return AccessController.doPrivileged(
1226 new PrivilegedAction<>(){
1227 public Integer run() {
1228 int val = Integer.getInteger(
1229 "jdk.net.ephemeralPortRange."+suffix, -1
1230 );
1231 if (val != -1) {
1232 return val;
1233 } else {
1234 return suffix.equals("low") ?
1235 PortConfig.getLower() : PortConfig.getUpper();
1236 }
1237 }
1238 }
1239 );
1240 }
1241
1242 /**
1243 * Check if the target range is within the policy range
1244 * together with the ephemeral range for this platform
1245 * (if policy includes ephemeral range)
1246 */
1247 private static boolean inRange(
1248 int policyLow, int policyHigh, int targetLow, int targetHigh
1249 )
1250 {
1251 final int ephemeralLow = EphemeralRange.low;
1252 final int ephemeralHigh = EphemeralRange.high;
1253
1254 if (targetLow == 0) {
1255 // check policy includes ephemeral range
1256 if (!inRange(policyLow, policyHigh, ephemeralLow, ephemeralHigh)) {
1257 return false;
1258 }
1259 if (targetHigh == 0) {
1260 // nothing left to do
1261 return true;
1262 }
1263 // continue check with first real port number
1264 targetLow = 1;
1265 }
1266
1267 if (policyLow == 0 && policyHigh == 0) {
1268 // ephemeral range only
1269 return targetLow >= ephemeralLow && targetHigh <= ephemeralHigh;
1270 }
1271
1272 if (policyLow != 0) {
1273 // simple check of policy only
1274 return targetLow >= policyLow && targetHigh <= policyHigh;
1275 }
1276
1277 // policyLow == 0 which means possibly two ranges to check
1278
1279 // first check if policy and ephem range overlap/contiguous
1280
1281 if (policyHigh >= ephemeralLow - 1) {
1282 return targetHigh <= ephemeralHigh;
1283 }
1284
1285 // policy and ephem range do not overlap
1286
1287 // target range must lie entirely inside policy range or eph range
1288
1289 return (targetLow <= policyHigh && targetHigh <= policyHigh) ||
1290 (targetLow >= ephemeralLow && targetHigh <= ephemeralHigh);
1291 }
1292 /*
1293 public String toString()
1294 {
1295 StringBuffer s = new StringBuffer(super.toString() + "\n" +
1296 "cname = " + cname + "\n" +
1297 "wildcard = " + wildcard + "\n" +
1298 "invalid = " + invalid + "\n" +
1299 "portrange = " + portrange[0] + "," + portrange[1] + "\n");
1300 if (addresses != null) for (int i=0; i<addresses.length; i++) {
1301 s.append( addresses[i].getHostAddress());
1302 s.append("\n");
1303 } else {
1304 s.append("(no addresses)\n");
1305 }
1306
1307 return s.toString();
1308 }
1309
1310 public static void main(String args[]) throws Exception {
1311 SocketPermission this_ = new SocketPermission(args[0], "connect");
1312 SocketPermission that_ = new SocketPermission(args[1], "connect");
1313 System.out.println("-----\n");
1314 System.out.println("this.implies(that) = " + this_.implies(that_));
1315 System.out.println("-----\n");
1316 System.out.println("this = "+this_);
1317 System.out.println("-----\n");
1318 System.out.println("that = "+that_);
1319 System.out.println("-----\n");
1320
1321 SocketPermissionCollection nps = new SocketPermissionCollection();
1322 nps.add(this_);
1323 nps.add(new SocketPermission("www-leland.stanford.edu","connect"));
1324 nps.add(new SocketPermission("www-example.com","connect"));
1325 System.out.println("nps.implies(that) = " + nps.implies(that_));
1326 System.out.println("-----\n");
1327 }
1328 */
1329 }
1330
1331 /**
1332
1333 if (init'd with IP, key is IP as string)
1334 if wildcard, its the wild card
1335 else its the cname?
1336
1337 *
1338 * @see java.security.Permission
1339 * @see java.security.Permissions
1340 * @see java.security.PermissionCollection
1341 *
1342 *
1343 * @author Roland Schemers
1344 *
1345 * @serial include
1346 */
1347
1348 final class SocketPermissionCollection extends PermissionCollection
1349 implements Serializable
1350 {
1351 // Not serialized; see serialization section at end of class
1352 // A ConcurrentSkipListMap is used to preserve order, so that most
1353 // recently added permissions are checked first (see JDK-4301064).
1354 private transient ConcurrentSkipListMap<String, SocketPermission> perms;
1355
1356 /**
1357 * Create an empty SocketPermissions object.
1358 *
1359 */
1360 public SocketPermissionCollection() {
1361 perms = new ConcurrentSkipListMap<>(new SPCComparator());
1362 }
1363
1364 /**
1365 * Adds a permission to the SocketPermissions. The key for the hash is
1366 * the name in the case of wildcards, or all the IP addresses.
1367 *
1368 * @param permission the Permission object to add.
1369 *
1370 * @throws IllegalArgumentException - if the permission is not a
1371 * SocketPermission
1372 *
1373 * @throws SecurityException - if this SocketPermissionCollection object
1374 * has been marked readonly
1375 */
1376 @Override
1377 public void add(Permission permission) {
1378 if (! (permission instanceof SocketPermission))
1379 throw new IllegalArgumentException("invalid permission: "+
1380 permission);
1381 if (isReadOnly())
1382 throw new SecurityException(
1383 "attempt to add a Permission to a readonly PermissionCollection");
1384
1385 SocketPermission sp = (SocketPermission)permission;
1386
1387 // Add permission to map if it is absent, or replace with new
1388 // permission if applicable. NOTE: cannot use lambda for
1389 // remappingFunction parameter until JDK-8076596 is fixed.
1390 perms.merge(sp.getName(), sp,
1391 new java.util.function.BiFunction<>() {
1392 @Override
1393 public SocketPermission apply(SocketPermission existingVal,
1394 SocketPermission newVal) {
1395 int oldMask = existingVal.getMask();
1396 int newMask = newVal.getMask();
1397 if (oldMask != newMask) {
1398 int effective = oldMask | newMask;
1399 if (effective == newMask) {
1400 return newVal;
1401 }
1402 if (effective != oldMask) {
1403 return new SocketPermission(sp.getName(),
1404 effective);
1405 }
1406 }
1407 return existingVal;
1408 }
1409 }
1410 );
1411 }
1412
1413 /**
1414 * Check and see if this collection of permissions implies the permissions
1415 * expressed in "permission".
1416 *
1417 * @param permission the Permission object to compare
1418 *
1419 * @return true if "permission" is a proper subset of a permission in
1420 * the collection, false if not.
1421 */
1422 @Override
1423 public boolean implies(Permission permission)
1424 {
1425 if (! (permission instanceof SocketPermission))
1426 return false;
1427
1428 SocketPermission np = (SocketPermission) permission;
1429
1430 int desired = np.getMask();
1431 int effective = 0;
1432 int needed = desired;
1433
1434 //System.out.println("implies "+np);
1435 for (SocketPermission x : perms.values()) {
1436 //System.out.println(" trying "+x);
1437 if (((needed & x.getMask()) != 0) && x.impliesIgnoreMask(np)) {
1438 effective |= x.getMask();
1439 if ((effective & desired) == desired) {
1440 return true;
1441 }
1442 needed = (desired ^ effective);
1443 }
1444 }
1445 return false;
1446 }
1447
1448 /**
1449 * Returns an enumeration of all the SocketPermission objects in the
1450 * container.
1451 *
1452 * @return an enumeration of all the SocketPermission objects.
1453 */
1454 @Override
1455 @SuppressWarnings("unchecked")
1456 public Enumeration<Permission> elements() {
1457 return (Enumeration)Collections.enumeration(perms.values());
1458 }
1459
1460 @java.io.Serial
1461 private static final long serialVersionUID = 2787186408602843674L;
1462
1463 // Need to maintain serialization interoperability with earlier releases,
1464 // which had the serializable field:
1465
1466 //
1467 // The SocketPermissions for this set.
1468 // @serial
1469 //
1470 // private Vector permissions;
1471
1472 /**
1473 * @serialField permissions java.util.Vector
1474 * A list of the SocketPermissions for this set.
1475 */
1476 @java.io.Serial
1477 private static final ObjectStreamField[] serialPersistentFields = {
1478 new ObjectStreamField("permissions", Vector.class),
1479 };
1480
1481 /**
1482 * @serialData "permissions" field (a Vector containing the SocketPermissions).
1483 */
1484 /*
1485 * Writes the contents of the perms field out as a Vector for
1486 * serialization compatibility with earlier releases.
1487 */
1488 @java.io.Serial
1489 private void writeObject(ObjectOutputStream out) throws IOException {
1490 // Don't call out.defaultWriteObject()
1491
1492 // Write out Vector
1493 Vector<SocketPermission> permissions = new Vector<>(perms.values());
1494
1495 ObjectOutputStream.PutField pfields = out.putFields();
1496 pfields.put("permissions", permissions);
1497 out.writeFields();
1498 }
1499
1500 /*
1501 * Reads in a Vector of SocketPermissions and saves them in the perms field.
1502 */
1503 @java.io.Serial
1504 private void readObject(ObjectInputStream in)
1505 throws IOException, ClassNotFoundException
1506 {
1507 // Don't call in.defaultReadObject()
1508
1509 // Read in serialized fields
1510 ObjectInputStream.GetField gfields = in.readFields();
1511
1512 // Get the one we want
1513 @SuppressWarnings("unchecked")
1514 Vector<SocketPermission> permissions = (Vector<SocketPermission>)gfields.get("permissions", null);
1515 perms = new ConcurrentSkipListMap<>(new SPCComparator());
1516 for (SocketPermission sp : permissions) {
1517 perms.put(sp.getName(), sp);
1518 }
1519 }
1520
1521 /**
1522 * A simple comparator that orders new non-equal entries at the beginning.
1523 */
1524 private static class SPCComparator implements Comparator<String> {
1525 @Override
1526 public int compare(String s1, String s2) {
1527 if (s1.equals(s2)) {
1528 return 0;
1529 }
1530 return -1;
1531 }
1532 }
1533 }