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 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 if (host.isEmpty()) { 310 return "localhost"; 311 } else { 312 /* IPv6 literal address used in this context should follow 313 * the format specified in RFC 2732; 314 * if not, we try to solve the unambiguous case 315 */ 316 int ind; 317 if (host.charAt(0) != '[') { 318 if ((ind = host.indexOf(':')) != host.lastIndexOf(':')) { 319 /* More than one ":", meaning IPv6 address is not 320 * in RFC 2732 format; 321 * We will rectify user errors for all unambiguous cases 322 */ 323 StringTokenizer st = new StringTokenizer(host, ":"); 324 int tokens = st.countTokens(); 325 if (tokens == 9) { 326 // IPv6 address followed by port 327 ind = host.lastIndexOf(':'); 328 host = "[" + host.substring(0, ind) + "]" + 329 host.substring(ind); 330 } else if (tokens == 8 && host.indexOf("::") == -1) { 331 // IPv6 address only, not followed by port 332 host = "[" + host + "]"; 333 } else { 334 // could be ambiguous 335 throw new IllegalArgumentException("Ambiguous"+ 336 " hostport part"); 337 } 338 } 339 } 340 return host; 341 } 342 } 343 344 private int[] parsePort(String port) 345 throws Exception 346 { 347 348 if (port == null || port.isEmpty() || port.equals("*")) { 349 return new int[] {PORT_MIN, PORT_MAX}; 350 } 351 352 int dash = port.indexOf('-'); 353 354 if (dash == -1) { 355 int p = Integer.parseInt(port); 356 return new int[] {p, p}; 357 } else { 358 String low = port.substring(0, dash); 359 String high = port.substring(dash+1); 360 int l,h; 361 362 if (low.isEmpty()) { 363 l = PORT_MIN; 364 } else { 365 l = Integer.parseInt(low); 366 } 367 368 if (high.isEmpty()) { 369 h = PORT_MAX; 370 } else { 371 h = Integer.parseInt(high); 372 } 373 if (l < 0 || h < 0 || h<l) 374 throw new IllegalArgumentException("invalid port range"); 375 376 return new int[] {l, h}; 377 } 378 } 379 380 /** 381 * Returns true if the permission has specified zero 382 * as its value (or lower bound) signifying the ephemeral range 383 */ 384 private boolean includesEphemerals() { 385 return portrange[0] == 0; 386 } 387 388 /** 389 * Initialize the SocketPermission object. We don't do any DNS lookups 390 * as this point, instead we hold off until the implies method is 391 * called. 392 */ 393 private void init(String host, int mask) { 394 // Set the integer mask that represents the actions 395 396 if ((mask & ALL) != mask) 397 throw new IllegalArgumentException("invalid actions mask"); 398 399 // always OR in RESOLVE if we allow any of the others 400 this.mask = mask | RESOLVE; 401 402 // Parse the host name. A name has up to three components, the 403 // hostname, a port number, or two numbers representing a port 404 // range. "www.example.com:8080-9090" is a valid host name. 405 406 // With IPv6 an address can be 2010:836B:4179::836B:4179 407 // An IPv6 address needs to be enclose in [] 408 // For ex: [2010:836B:4179::836B:4179]:8080-9090 409 // Refer to RFC 2732 for more information. 410 411 int rb = 0 ; 412 int start = 0, end = 0; 413 int sep = -1; 414 String hostport = host; 415 if (host.charAt(0) == '[') { 416 start = 1; 417 rb = host.indexOf(']'); 418 if (rb != -1) { 419 host = host.substring(start, rb); 420 } else { 421 throw new 422 IllegalArgumentException("invalid host/port: "+host); 423 } 424 sep = hostport.indexOf(':', rb+1); 425 } else { 426 start = 0; 427 sep = host.indexOf(':', rb); 428 end = sep; 429 if (sep != -1) { 430 host = host.substring(start, end); 431 } 432 } 433 434 if (sep != -1) { 435 String port = hostport.substring(sep+1); 436 try { 437 portrange = parsePort(port); 438 } catch (Exception e) { 439 throw new 440 IllegalArgumentException("invalid port range: "+port); 441 } 442 } else { 443 portrange = new int[] { PORT_MIN, PORT_MAX }; 444 } 445 446 hostname = host; 447 448 // is this a domain wildcard specification 449 if (host.lastIndexOf('*') > 0) { 450 throw new 451 IllegalArgumentException("invalid host wildcard specification"); 452 } else if (host.startsWith("*")) { 453 wildcard = true; 454 if (host.equals("*")) { 455 cname = ""; 456 } else if (host.startsWith("*.")) { 457 cname = host.substring(1).toLowerCase(); 458 } else { 459 throw new 460 IllegalArgumentException("invalid host wildcard specification"); 461 } 462 return; 463 } else { 464 if (!host.isEmpty()) { 465 // see if we are being initialized with an IP address. 466 char ch = host.charAt(0); 467 if (ch == ':' || Character.digit(ch, 16) != -1) { 468 byte ip[] = IPAddressUtil.textToNumericFormatV4(host); 469 if (ip == null) { 470 ip = IPAddressUtil.textToNumericFormatV6(host); 471 } 472 if (ip != null) { 473 try { 474 addresses = 475 new InetAddress[] 476 {InetAddress.getByAddress(ip) }; 477 init_with_ip = true; 478 } catch (UnknownHostException uhe) { 479 // this shouldn't happen 480 invalid = true; 481 } 482 } 483 } 484 } 485 } 486 } 487 488 /** 489 * Convert an action string to an integer actions mask. 490 * 491 * @param action the action string 492 * @return the action mask 493 */ 494 private static int getMask(String action) { 495 496 if (action == null) { 497 throw new NullPointerException("action can't be null"); 498 } 499 500 if (action.isEmpty()) { 501 throw new IllegalArgumentException("action can't be empty"); 502 } 503 504 int mask = NONE; 505 506 // Use object identity comparison against known-interned strings for 507 // performance benefit (these values are 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 break; 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 private boolean isUntrusted() 614 throws UnknownHostException 615 { 616 if (trusted) return false; 617 if (invalid || untrusted) return true; 618 try { 619 if (!trustNameService && (defaultDeny || 620 sun.net.www.URLConnection.isProxiedHost(hostname))) { 621 if (this.cname == null) { 622 this.getCanonName(); 623 } 624 if (!match(cname, hostname)) { 625 // Last chance 626 if (!authorized(hostname, addresses[0].getAddress())) { 627 untrusted = true; 628 Debug debug = getDebug(); 629 if (debug != null && Debug.isOn("failure")) { 630 debug.println("socket access restriction: proxied host " + "(" + addresses[0] + ")" + " does not match " + cname + " from reverse lookup"); 631 } 632 return true; 633 } 634 } 635 trusted = true; 636 } 637 } catch (UnknownHostException uhe) { 638 invalid = true; 639 throw uhe; 640 } 641 return false; 642 } 643 644 /** 645 * attempt to get the fully qualified domain name 646 * 647 */ 648 void getCanonName() 649 throws UnknownHostException 650 { 651 if (cname != null || invalid || untrusted) return; 652 653 // attempt to get the canonical name 654 655 try { 656 // first get the IP addresses if we don't have them yet 657 // this is because we need the IP address to then get 658 // FQDN. 659 if (addresses == null) { 660 getIP(); 661 } 662 663 // we have to do this check, otherwise we might not 664 // get the fully qualified domain name 665 if (init_with_ip) { 666 cname = addresses[0].getHostName(false).toLowerCase(); 667 } else { 668 cname = InetAddress.getByName(addresses[0].getHostAddress()). 669 getHostName(false).toLowerCase(); 670 } 671 } catch (UnknownHostException uhe) { 672 invalid = true; 673 throw uhe; 674 } 675 } 676 677 private transient String cdomain, hdomain; 678 679 /** 680 * previously we allowed domain names to be specified in IDN ACE form 681 * Need to check for that and convert to Unicode 682 */ 683 private static String checkForIDN(String name) { 684 if (name.startsWith("xn--") || name.contains(".xn--")) { 685 return IDN.toUnicode(name); 686 } else { 687 return name; 688 } 689 } 690 691 private boolean match(String cname, String hname) { 692 String a = checkForIDN(cname.toLowerCase()); 693 String b = checkForIDN(hname.toLowerCase()); 694 if (a.startsWith(b) && 695 ((a.length() == b.length()) || (a.charAt(b.length()) == '.'))) { 696 return true; 697 } 698 if (cdomain == null) { 699 cdomain = RegisteredDomain.from(a) 700 .map(RegisteredDomain::name) 701 .orElse(a); 702 } 703 if (hdomain == null) { 704 hdomain = RegisteredDomain.from(b) 705 .map(RegisteredDomain::name) 706 .orElse(b); 707 } 708 709 return !cdomain.isEmpty() && !hdomain.isEmpty() && cdomain.equals(hdomain); 710 } 711 712 private boolean authorized(String cname, byte[] addr) { 713 if (addr.length == 4) 714 return authorizedIPv4(cname, addr); 715 else if (addr.length == 16) 716 return authorizedIPv6(cname, addr); 717 else 718 return false; 719 } 720 721 private boolean authorizedIPv4(String cname, byte[] addr) { 722 String authHost = ""; 723 InetAddress auth; 724 725 try { 726 authHost = "auth." + 727 (addr[3] & 0xff) + "." + (addr[2] & 0xff) + "." + 728 (addr[1] & 0xff) + "." + (addr[0] & 0xff) + 729 ".in-addr.arpa"; 730 // Following check seems unnecessary 731 // auth = InetAddress.getAllByName0(authHost, false)[0]; 732 authHost = hostname + '.' + authHost; 733 auth = InetAddress.getAllByName0(authHost, false)[0]; 734 if (auth.equals(InetAddress.getByAddress(addr))) { 735 return true; 736 } 737 Debug debug = getDebug(); 738 if (debug != null && Debug.isOn("failure")) { 739 debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr)); 740 } 741 } catch (UnknownHostException uhe) { 742 Debug debug = getDebug(); 743 if (debug != null && Debug.isOn("failure")) { 744 debug.println("socket access restriction: forward lookup failed for " + authHost); 745 } 746 } 747 return false; 748 } 749 750 private boolean authorizedIPv6(String cname, byte[] addr) { 751 String authHost = ""; 752 InetAddress auth; 753 754 try { 755 StringBuilder sb = new StringBuilder(39); 756 757 for (int i = 15; i >= 0; i--) { 758 sb.append(Integer.toHexString(((addr[i]) & 0x0f))); 759 sb.append('.'); 760 sb.append(Integer.toHexString(((addr[i] >> 4) & 0x0f))); 761 sb.append('.'); 762 } 763 authHost = "auth." + sb.toString() + "IP6.ARPA"; 764 //auth = InetAddress.getAllByName0(authHost, false)[0]; 765 authHost = hostname + '.' + authHost; 766 auth = InetAddress.getAllByName0(authHost, false)[0]; 767 if (auth.equals(InetAddress.getByAddress(addr))) 768 return true; 769 Debug debug = getDebug(); 770 if (debug != null && Debug.isOn("failure")) { 771 debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr)); 772 } 773 } catch (UnknownHostException uhe) { 774 Debug debug = getDebug(); 775 if (debug != null && Debug.isOn("failure")) { 776 debug.println("socket access restriction: forward lookup failed for " + authHost); 777 } 778 } 779 return false; 780 } 781 782 783 /** 784 * get IP addresses. Sets invalid to true if we can't get them. 785 * 786 */ 787 void getIP() 788 throws UnknownHostException 789 { 790 if (addresses != null || wildcard || invalid) return; 791 792 try { 793 // now get all the IP addresses 794 String host; 795 if (getName().charAt(0) == '[') { 796 // Literal IPv6 address 797 host = getName().substring(1, getName().indexOf(']')); 798 } else { 799 int i = getName().indexOf(':'); 800 if (i == -1) 801 host = getName(); 802 else { 803 host = getName().substring(0,i); 804 } 805 } 806 807 addresses = 808 new InetAddress[] {InetAddress.getAllByName0(host, false)[0]}; 809 810 } catch (UnknownHostException uhe) { 811 invalid = true; 812 throw uhe; 813 } catch (IndexOutOfBoundsException iobe) { 814 invalid = true; 815 throw new UnknownHostException(getName()); 816 } 817 } 818 819 /** 820 * Checks if this socket permission object "implies" the 821 * specified permission. 822 * <P> 823 * More specifically, this method first ensures that all of the following 824 * are true (and returns false if any of them are not): 825 * <ul> 826 * <li> <i>p</i> is an instanceof SocketPermission, 827 * <li> <i>p</i>'s actions are a proper subset of this 828 * object's actions, and 829 * <li> <i>p</i>'s port range is included in this port range. Note: 830 * port range is ignored when p only contains the action, 'resolve'. 831 * </ul> 832 * 833 * Then {@code implies} checks each of the following, in order, 834 * and for each returns true if the stated condition is true: 835 * <ul> 836 * <li> If this object was initialized with a single IP address and one of <i>p</i>'s 837 * IP addresses is equal to this object's IP address. 838 * <li>If this object is a wildcard domain (such as *.example.com), and 839 * <i>p</i>'s canonical name (the name without any preceding *) 840 * ends with this object's canonical host name. For example, *.example.com 841 * implies *.foo.example.com. 842 * <li>If this object was not initialized with a single IP address, and one of this 843 * object's IP addresses equals one of <i>p</i>'s IP addresses. 844 * <li>If this canonical name equals <i>p</i>'s canonical name. 845 * </ul> 846 * 847 * If none of the above are true, {@code implies} returns false. 848 * @param p the permission to check against. 849 * 850 * @return true if the specified permission is implied by this object, 851 * false if not. 852 */ 853 @Override 854 public boolean implies(Permission p) { 855 int i,j; 856 857 if (!(p instanceof SocketPermission)) 858 return false; 859 860 if (p == this) 861 return true; 862 863 SocketPermission that = (SocketPermission) p; 864 865 return ((this.mask & that.mask) == that.mask) && 866 impliesIgnoreMask(that); 867 } 868 869 /** 870 * Checks if the incoming Permission's action are a proper subset of 871 * the this object's actions. 872 * <P> 873 * Check, in the following order: 874 * <ul> 875 * <li> Checks that "p" is an instanceof a SocketPermission 876 * <li> Checks that "p"'s actions are a proper subset of the 877 * current object's actions. 878 * <li> Checks that "p"'s port range is included in this port range 879 * <li> If this object was initialized with an IP address, checks that 880 * one of "p"'s IP addresses is equal to this object's IP address. 881 * <li> If either object is a wildcard domain (i.e., "*.example.com"), 882 * attempt to match based on the wildcard. 883 * <li> If this object was not initialized with an IP address, attempt 884 * to find a match based on the IP addresses in both objects. 885 * <li> Attempt to match on the canonical hostnames of both objects. 886 * </ul> 887 * @param that the incoming permission request 888 * 889 * @return true if "permission" is a proper subset of the current object, 890 * false if not. 891 */ 892 boolean impliesIgnoreMask(SocketPermission that) { 893 int i,j; 894 895 if ((that.mask & RESOLVE) != that.mask) { 896 897 // check simple port range 898 if ((that.portrange[0] < this.portrange[0]) || 899 (that.portrange[1] > this.portrange[1])) { 900 901 // if either includes the ephemeral range, do full check 902 if (this.includesEphemerals() || that.includesEphemerals()) { 903 if (!inRange(this.portrange[0], this.portrange[1], 904 that.portrange[0], that.portrange[1])) 905 { 906 return false; 907 } 908 } else { 909 return false; 910 } 911 } 912 } 913 914 // allow a "*" wildcard to always match anything 915 if (this.wildcard && "".equals(this.cname)) 916 return true; 917 918 // return if either one of these NetPerm objects are invalid... 919 if (this.invalid || that.invalid) { 920 return compareHostnames(that); 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., *.example.com 948 // implies *.foo.example.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 // compare IP addresses 965 if (this.addresses == null) { 966 this.getIP(); 967 } 968 969 if (that.addresses == null) { 970 that.getIP(); 971 } 972 973 if (!(that.init_with_ip && this.isUntrusted())) { 974 for (j = 0; j < this.addresses.length; j++) { 975 for (i=0; i < that.addresses.length; i++) { 976 if (this.addresses[j].equals(that.addresses[i])) 977 return true; 978 } 979 } 980 981 // XXX: if all else fails, compare hostnames? 982 // Do we really want this? 983 if (this.cname == null) { 984 this.getCanonName(); 985 } 986 987 if (that.cname == null) { 988 that.getCanonName(); 989 } 990 991 return (this.cname.equalsIgnoreCase(that.cname)); 992 } 993 994 } catch (UnknownHostException uhe) { 995 return compareHostnames(that); 996 } 997 998 // make sure the first thing that is done here is to return 999 // false. If not, uncomment the return false in the above catch. 1000 1001 return false; 1002 } 1003 1004 private boolean compareHostnames(SocketPermission that) { 1005 // we see if the original names/IPs passed in were equal. 1006 1007 String thisHost = hostname; 1008 String thatHost = that.hostname; 1009 1010 if (thisHost == null) { 1011 return false; 1012 } else if (this.wildcard) { 1013 final int cnameLength = this.cname.length(); 1014 return thatHost.regionMatches(true, 1015 (thatHost.length() - cnameLength), 1016 this.cname, 0, cnameLength); 1017 } else { 1018 return thisHost.equalsIgnoreCase(thatHost); 1019 } 1020 } 1021 1022 /** 1023 * Checks two SocketPermission objects for equality. 1024 * 1025 * @param obj the object to test for equality with this object. 1026 * 1027 * @return true if <i>obj</i> is a SocketPermission, and has the 1028 * same hostname, port range, and actions as this 1029 * SocketPermission object. However, port range will be ignored 1030 * in the comparison if <i>obj</i> only contains the action, 'resolve'. 1031 */ 1032 @Override 1033 public boolean equals(Object obj) { 1034 if (obj == this) 1035 return true; 1036 1037 if (! (obj instanceof SocketPermission)) 1038 return false; 1039 1040 SocketPermission that = (SocketPermission) obj; 1041 1042 //this is (overly?) complex!!! 1043 1044 // check the mask first 1045 if (this.mask != that.mask) return false; 1046 1047 if ((that.mask & RESOLVE) != that.mask) { 1048 // now check the port range... 1049 if ((this.portrange[0] != that.portrange[0]) || 1050 (this.portrange[1] != that.portrange[1])) { 1051 return false; 1052 } 1053 } 1054 1055 // short cut. This catches: 1056 // "crypto" equal to "crypto", or 1057 // "1.2.3.4" equal to "1.2.3.4.", or 1058 // "*.edu" equal to "*.edu", but it 1059 // does not catch "crypto" equal to 1060 // "crypto.foo.example.com". 1061 1062 if (this.getName().equalsIgnoreCase(that.getName())) { 1063 return true; 1064 } 1065 1066 // we now attempt to get the Canonical (FQDN) name and 1067 // compare that. If this fails, about all we can do is return 1068 // false. 1069 1070 try { 1071 this.getCanonName(); 1072 that.getCanonName(); 1073 } catch (UnknownHostException uhe) { 1074 return false; 1075 } 1076 1077 if (this.invalid || that.invalid) 1078 return false; 1079 1080 if (this.cname != null) { 1081 return this.cname.equalsIgnoreCase(that.cname); 1082 } 1083 1084 return false; 1085 } 1086 1087 /** 1088 * Returns the hash code value for this object. 1089 * 1090 * @return a hash code value for this object. 1091 */ 1092 @Override 1093 public int hashCode() { 1094 /* 1095 * If this SocketPermission was initialized with an IP address 1096 * or a wildcard, use getName().hashCode(), otherwise use 1097 * the hashCode() of the host name returned from 1098 * java.net.InetAddress.getHostName method. 1099 */ 1100 1101 if (init_with_ip || wildcard) { 1102 return this.getName().hashCode(); 1103 } 1104 1105 try { 1106 getCanonName(); 1107 } catch (UnknownHostException uhe) { 1108 1109 } 1110 1111 if (invalid || cname == null) 1112 return this.getName().hashCode(); 1113 else 1114 return this.cname.hashCode(); 1115 } 1116 1117 /** 1118 * Return the current action mask. 1119 * 1120 * @return the actions mask. 1121 */ 1122 1123 int getMask() { 1124 return mask; 1125 } 1126 1127 /** 1128 * Returns the "canonical string representation" of the actions in the 1129 * specified mask. 1130 * Always returns present actions in the following order: 1131 * connect, listen, accept, resolve. 1132 * 1133 * @param mask a specific integer action mask to translate into a string 1134 * @return the canonical string representation of the actions 1135 */ 1136 private static String getActions(int mask) { 1137 StringJoiner sj = new StringJoiner(","); 1138 if ((mask & CONNECT) == CONNECT) { 1139 sj.add("connect"); 1140 } 1141 if ((mask & LISTEN) == LISTEN) { 1142 sj.add("listen"); 1143 } 1144 if ((mask & ACCEPT) == ACCEPT) { 1145 sj.add("accept"); 1146 } 1147 if ((mask & RESOLVE) == RESOLVE) { 1148 sj.add("resolve"); 1149 } 1150 return sj.toString(); 1151 } 1152 1153 /** 1154 * Returns the canonical string representation of the actions. 1155 * Always returns present actions in the following order: 1156 * connect, listen, accept, resolve. 1157 * 1158 * @return the canonical string representation of the actions. 1159 */ 1160 @Override 1161 public String getActions() 1162 { 1163 if (actions == null) 1164 actions = getActions(this.mask); 1165 1166 return actions; 1167 } 1168 1169 /** 1170 * Returns a new PermissionCollection object for storing SocketPermission 1171 * objects. 1172 * <p> 1173 * SocketPermission objects must be stored in a manner that allows them 1174 * to be inserted into the collection in any order, but that also enables the 1175 * PermissionCollection {@code implies} 1176 * method to be implemented in an efficient (and consistent) manner. 1177 * 1178 * @return a new PermissionCollection object suitable for storing SocketPermissions. 1179 */ 1180 @Override 1181 public PermissionCollection newPermissionCollection() { 1182 return new SocketPermissionCollection(); 1183 } 1184 1185 /** 1186 * WriteObject is called to save the state of the SocketPermission 1187 * to a stream. The actions are serialized, and the superclass 1188 * takes care of the name. 1189 */ 1190 @java.io.Serial 1191 private synchronized void writeObject(java.io.ObjectOutputStream s) 1192 throws IOException 1193 { 1194 // Write out the actions. The superclass takes care of the name 1195 // call getActions to make sure actions field is initialized 1196 if (actions == null) 1197 getActions(); 1198 s.defaultWriteObject(); 1199 } 1200 1201 /** 1202 * readObject is called to restore the state of the SocketPermission from 1203 * a stream. 1204 */ 1205 @java.io.Serial 1206 private synchronized void readObject(java.io.ObjectInputStream s) 1207 throws IOException, ClassNotFoundException 1208 { 1209 // Read in the action, then initialize the rest 1210 s.defaultReadObject(); 1211 init(getName(),getMask(actions)); 1212 } 1213 1214 /** 1215 * Check the system/security property for the ephemeral port range 1216 * for this system. The suffix is either "high" or "low" 1217 */ 1218 private static int initEphemeralPorts(String suffix, int defval) { 1219 return AccessController.doPrivileged( 1220 new PrivilegedAction<>(){ 1221 public Integer run() { 1222 int val = Integer.getInteger( 1223 "jdk.net.ephemeralPortRange."+suffix, -1 1224 ); 1225 if (val != -1) { 1226 return val; 1227 } else { 1228 return suffix.equals("low") ? 1229 PortConfig.getLower() : PortConfig.getUpper(); 1230 } 1231 } 1232 } 1233 ); 1234 } 1235 1236 /** 1237 * Check if the target range is within the policy range 1238 * together with the ephemeral range for this platform 1239 * (if policy includes ephemeral range) 1240 */ 1241 private static boolean inRange( 1242 int policyLow, int policyHigh, int targetLow, int targetHigh 1243 ) 1244 { 1245 final int ephemeralLow = EphemeralRange.low; 1246 final int ephemeralHigh = EphemeralRange.high; 1247 1248 if (targetLow == 0) { 1249 // check policy includes ephemeral range 1250 if (!inRange(policyLow, policyHigh, ephemeralLow, ephemeralHigh)) { 1251 return false; 1252 } 1253 if (targetHigh == 0) { 1254 // nothing left to do 1255 return true; 1256 } 1257 // continue check with first real port number 1258 targetLow = 1; 1259 } 1260 1261 if (policyLow == 0 && policyHigh == 0) { 1262 // ephemeral range only 1263 return targetLow >= ephemeralLow && targetHigh <= ephemeralHigh; 1264 } 1265 1266 if (policyLow != 0) { 1267 // simple check of policy only 1268 return targetLow >= policyLow && targetHigh <= policyHigh; 1269 } 1270 1271 // policyLow == 0 which means possibly two ranges to check 1272 1273 // first check if policy and ephem range overlap/contiguous 1274 1275 if (policyHigh >= ephemeralLow - 1) { 1276 return targetHigh <= ephemeralHigh; 1277 } 1278 1279 // policy and ephem range do not overlap 1280 1281 // target range must lie entirely inside policy range or eph range 1282 1283 return (targetLow <= policyHigh && targetHigh <= policyHigh) || 1284 (targetLow >= ephemeralLow && targetHigh <= ephemeralHigh); 1285 } 1286 /* 1287 public String toString() 1288 { 1289 StringBuffer s = new StringBuffer(super.toString() + "\n" + 1290 "cname = " + cname + "\n" + 1291 "wildcard = " + wildcard + "\n" + 1292 "invalid = " + invalid + "\n" + 1293 "portrange = " + portrange[0] + "," + portrange[1] + "\n"); 1294 if (addresses != null) for (int i=0; i<addresses.length; i++) { 1295 s.append( addresses[i].getHostAddress()); 1296 s.append("\n"); 1297 } else { 1298 s.append("(no addresses)\n"); 1299 } 1300 1301 return s.toString(); 1302 } 1303 1304 public static void main(String args[]) throws Exception { 1305 SocketPermission this_ = new SocketPermission(args[0], "connect"); 1306 SocketPermission that_ = new SocketPermission(args[1], "connect"); 1307 System.out.println("-----\n"); 1308 System.out.println("this.implies(that) = " + this_.implies(that_)); 1309 System.out.println("-----\n"); 1310 System.out.println("this = "+this_); 1311 System.out.println("-----\n"); 1312 System.out.println("that = "+that_); 1313 System.out.println("-----\n"); 1314 1315 SocketPermissionCollection nps = new SocketPermissionCollection(); 1316 nps.add(this_); 1317 nps.add(new SocketPermission("www-leland.stanford.edu","connect")); 1318 nps.add(new SocketPermission("www-example.com","connect")); 1319 System.out.println("nps.implies(that) = " + nps.implies(that_)); 1320 System.out.println("-----\n"); 1321 } 1322 */ 1323 } 1324 1325 /** 1326 1327 if (init'd with IP, key is IP as string) 1328 if wildcard, its the wild card 1329 else its the cname? 1330 1331 * 1332 * @see java.security.Permission 1333 * @see java.security.Permissions 1334 * @see java.security.PermissionCollection 1335 * 1336 * 1337 * @author Roland Schemers 1338 * 1339 * @serial include 1340 */ 1341 1342 final class SocketPermissionCollection extends PermissionCollection 1343 implements Serializable 1344 { 1345 // Not serialized; see serialization section at end of class 1346 // A ConcurrentSkipListMap is used to preserve order, so that most 1347 // recently added permissions are checked first (see JDK-4301064). 1348 private transient ConcurrentSkipListMap<String, SocketPermission> perms; 1349 1350 /** 1351 * Create an empty SocketPermissions object. 1352 * 1353 */ 1354 public SocketPermissionCollection() { 1355 perms = new ConcurrentSkipListMap<>(new SPCComparator()); 1356 } 1357 1358 /** 1359 * Adds a permission to the SocketPermissions. The key for the hash is 1360 * the name in the case of wildcards, or all the IP addresses. 1361 * 1362 * @param permission the Permission object to add. 1363 * 1364 * @exception IllegalArgumentException - if the permission is not a 1365 * SocketPermission 1366 * 1367 * @exception SecurityException - if this SocketPermissionCollection object 1368 * has been marked readonly 1369 */ 1370 @Override 1371 public void add(Permission permission) { 1372 if (! (permission instanceof SocketPermission)) 1373 throw new IllegalArgumentException("invalid permission: "+ 1374 permission); 1375 if (isReadOnly()) 1376 throw new SecurityException( 1377 "attempt to add a Permission to a readonly PermissionCollection"); 1378 1379 SocketPermission sp = (SocketPermission)permission; 1380 1381 // Add permission to map if it is absent, or replace with new 1382 // permission if applicable. NOTE: cannot use lambda for 1383 // remappingFunction parameter until JDK-8076596 is fixed. 1384 perms.merge(sp.getName(), sp, 1385 new java.util.function.BiFunction<>() { 1386 @Override 1387 public SocketPermission apply(SocketPermission existingVal, 1388 SocketPermission newVal) { 1389 int oldMask = existingVal.getMask(); 1390 int newMask = newVal.getMask(); 1391 if (oldMask != newMask) { 1392 int effective = oldMask | newMask; 1393 if (effective == newMask) { 1394 return newVal; 1395 } 1396 if (effective != oldMask) { 1397 return new SocketPermission(sp.getName(), 1398 effective); 1399 } 1400 } 1401 return existingVal; 1402 } 1403 } 1404 ); 1405 } 1406 1407 /** 1408 * Check and see if this collection of permissions implies the permissions 1409 * expressed in "permission". 1410 * 1411 * @param permission the Permission object to compare 1412 * 1413 * @return true if "permission" is a proper subset of a permission in 1414 * the collection, false if not. 1415 */ 1416 @Override 1417 public boolean implies(Permission permission) 1418 { 1419 if (! (permission instanceof SocketPermission)) 1420 return false; 1421 1422 SocketPermission np = (SocketPermission) permission; 1423 1424 int desired = np.getMask(); 1425 int effective = 0; 1426 int needed = desired; 1427 1428 //System.out.println("implies "+np); 1429 for (SocketPermission x : perms.values()) { 1430 //System.out.println(" trying "+x); 1431 if (((needed & x.getMask()) != 0) && x.impliesIgnoreMask(np)) { 1432 effective |= x.getMask(); 1433 if ((effective & desired) == desired) { 1434 return true; 1435 } 1436 needed = (desired ^ effective); 1437 } 1438 } 1439 return false; 1440 } 1441 1442 /** 1443 * Returns an enumeration of all the SocketPermission objects in the 1444 * container. 1445 * 1446 * @return an enumeration of all the SocketPermission objects. 1447 */ 1448 @Override 1449 @SuppressWarnings("unchecked") 1450 public Enumeration<Permission> elements() { 1451 return (Enumeration)Collections.enumeration(perms.values()); 1452 } 1453 1454 @java.io.Serial 1455 private static final long serialVersionUID = 2787186408602843674L; 1456 1457 // Need to maintain serialization interoperability with earlier releases, 1458 // which had the serializable field: 1459 1460 // 1461 // The SocketPermissions for this set. 1462 // @serial 1463 // 1464 // private Vector permissions; 1465 1466 /** 1467 * @serialField permissions java.util.Vector 1468 * A list of the SocketPermissions for this set. 1469 */ 1470 @java.io.Serial 1471 private static final ObjectStreamField[] serialPersistentFields = { 1472 new ObjectStreamField("permissions", Vector.class), 1473 }; 1474 1475 /** 1476 * @serialData "permissions" field (a Vector containing the SocketPermissions). 1477 */ 1478 /* 1479 * Writes the contents of the perms field out as a Vector for 1480 * serialization compatibility with earlier releases. 1481 */ 1482 @java.io.Serial 1483 private void writeObject(ObjectOutputStream out) throws IOException { 1484 // Don't call out.defaultWriteObject() 1485 1486 // Write out Vector 1487 Vector<SocketPermission> permissions = new Vector<>(perms.values()); 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 @java.io.Serial 1498 private void readObject(ObjectInputStream in) 1499 throws IOException, ClassNotFoundException 1500 { 1501 // Don't call in.defaultReadObject() 1502 1503 // Read in serialized fields 1504 ObjectInputStream.GetField gfields = in.readFields(); 1505 1506 // Get the one we want 1507 @SuppressWarnings("unchecked") 1508 Vector<SocketPermission> permissions = (Vector<SocketPermission>)gfields.get("permissions", null); 1509 perms = new ConcurrentSkipListMap<>(new SPCComparator()); 1510 for (SocketPermission sp : permissions) { 1511 perms.put(sp.getName(), sp); 1512 } 1513 } 1514 1515 /** 1516 * A simple comparator that orders new non-equal entries at the beginning. 1517 */ 1518 private static class SPCComparator implements Comparator<String> { 1519 @Override 1520 public int compare(String s1, String s2) { 1521 if (s1.equals(s2)) { 1522 return 0; 1523 } 1524 return -1; 1525 } 1526 } 1527 }