| /* |
| * Copyright (c) 1997, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.net; |
| |
| import java.util.Enumeration; |
| import java.util.Vector; |
| import java.util.List; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.StringTokenizer; |
| import java.net.InetAddress; |
| import java.security.Permission; |
| import java.security.PermissionCollection; |
| import java.io.Serializable; |
| import java.io.ObjectStreamField; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectInputStream; |
| import java.io.IOException; |
| import sun.net.util.IPAddressUtil; |
| import sun.net.RegisteredDomain; |
| import sun.security.util.SecurityConstants; |
| import sun.security.util.Debug; |
| |
| |
| /** |
| * This class represents access to a network via sockets. |
| * A SocketPermission consists of a |
| * host specification and a set of "actions" specifying ways to |
| * connect to that host. The host is specified as |
| * <pre> |
| * host = (hostname | IPv4address | iPv6reference) [:portrange] |
| * portrange = portnumber | -portnumber | portnumber-[portnumber] |
| * </pre> |
| * The host is expressed as a DNS name, as a numerical IP address, |
| * or as "localhost" (for the local machine). |
| * The wildcard "*" may be included once in a DNS name host |
| * specification. If it is included, it must be in the leftmost |
| * position, as in "*.sun.com". |
| * <p> |
| * The format of the IPv6reference should follow that specified in <a |
| * href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format |
| * for Literal IPv6 Addresses in URLs</i></a>: |
| * <pre> |
| * ipv6reference = "[" IPv6address "]" |
| *</pre> |
| * For example, you can construct a SocketPermission instance |
| * as the following: |
| * <pre> |
| * String hostAddress = inetaddress.getHostAddress(); |
| * if (inetaddress instanceof Inet6Address) { |
| * sp = new SocketPermission("[" + hostAddress + "]:" + port, action); |
| * } else { |
| * sp = new SocketPermission(hostAddress + ":" + port, action); |
| * } |
| * </pre> |
| * or |
| * <pre> |
| * String host = url.getHost(); |
| * sp = new SocketPermission(host + ":" + port, action); |
| * </pre> |
| * <p> |
| * The <A HREF="Inet6Address.html#lform">full uncompressed form</A> of |
| * an IPv6 literal address is also valid. |
| * <p> |
| * The port or portrange is optional. A port specification of the |
| * form "N-", where <i>N</i> is a port number, signifies all ports |
| * numbered <i>N</i> and above, while a specification of the |
| * form "-N" indicates all ports numbered <i>N</i> and below. |
| * <p> |
| * The possible ways to connect to the host are |
| * <pre> |
| * accept |
| * connect |
| * listen |
| * resolve |
| * </pre> |
| * The "listen" action is only meaningful when used with "localhost". |
| * The "resolve" action is implied when any of the other actions are present. |
| * The action "resolve" refers to host/ip name service lookups. |
| * <P> |
| * The actions string is converted to lowercase before processing. |
| * <p>As an example of the creation and meaning of SocketPermissions, |
| * note that if the following permission: |
| * |
| * <pre> |
| * p1 = new SocketPermission("puffin.eng.sun.com:7777", "connect,accept"); |
| * </pre> |
| * |
| * is granted to some code, it allows that code to connect to port 7777 on |
| * <code>puffin.eng.sun.com</code>, and to accept connections on that port. |
| * |
| * <p>Similarly, if the following permission: |
| * |
| * <pre> |
| * p2 = new SocketPermission("localhost:1024-", "accept,connect,listen"); |
| * </pre> |
| * |
| * is granted to some code, it allows that code to |
| * accept connections on, connect to, or listen on any port between |
| * 1024 and 65535 on the local host. |
| * |
| * <p>Note: Granting code permission to accept or make connections to remote |
| * hosts may be dangerous because malevolent code can then more easily |
| * transfer and share confidential data among parties who may not |
| * otherwise have access to the data. |
| * |
| * @see java.security.Permissions |
| * @see SocketPermission |
| * |
| * |
| * @author Marianne Mueller |
| * @author Roland Schemers |
| * |
| * @serial exclude |
| */ |
| |
| public final class SocketPermission extends Permission |
| implements java.io.Serializable |
| { |
| private static final long serialVersionUID = -7204263841984476862L; |
| |
| /** |
| * Connect to host:port |
| */ |
| private final static int CONNECT = 0x1; |
| |
| /** |
| * Listen on host:port |
| */ |
| private final static int LISTEN = 0x2; |
| |
| /** |
| * Accept a connection from host:port |
| */ |
| private final static int ACCEPT = 0x4; |
| |
| /** |
| * Resolve DNS queries |
| */ |
| private final static int RESOLVE = 0x8; |
| |
| /** |
| * No actions |
| */ |
| private final static int NONE = 0x0; |
| |
| /** |
| * All actions |
| */ |
| private final static int ALL = CONNECT|LISTEN|ACCEPT|RESOLVE; |
| |
| // various port constants |
| private static final int PORT_MIN = 0; |
| private static final int PORT_MAX = 65535; |
| private static final int PRIV_PORT_MAX = 1023; |
| |
| // the actions mask |
| private transient int mask; |
| |
| /** |
| * the actions string. |
| * |
| * @serial |
| */ |
| |
| private String actions; // Left null as long as possible, then |
| // created and re-used in the getAction function. |
| |
| // hostname part as it is passed |
| private transient String hostname; |
| |
| // the canonical name of the host |
| // in the case of "*.foo.com", cname is ".foo.com". |
| |
| private transient String cname; |
| |
| // all the IP addresses of the host |
| private transient InetAddress[] addresses; |
| |
| // true if the hostname is a wildcard (e.g. "*.sun.com") |
| private transient boolean wildcard; |
| |
| // true if we were initialized with a single numeric IP address |
| private transient boolean init_with_ip; |
| |
| // true if this SocketPermission represents an invalid/unknown host |
| // used for implies when the delayed lookup has already failed |
| private transient boolean invalid; |
| |
| // port range on host |
| private transient int[] portrange; |
| |
| private transient boolean defaultDeny = false; |
| |
| // true if this SocketPermission represents a hostname |
| // that failed our reverse mapping heuristic test |
| private transient boolean untrusted; |
| private transient boolean trusted; |
| |
| // true if the sun.net.trustNameService system property is set |
| private static boolean trustNameService; |
| |
| private static Debug debug = null; |
| private static boolean debugInit = false; |
| |
| static { |
| Boolean tmp = java.security.AccessController.doPrivileged( |
| new sun.security.action.GetBooleanAction("sun.net.trustNameService")); |
| trustNameService = tmp.booleanValue(); |
| } |
| |
| private static synchronized Debug getDebug() |
| { |
| if (!debugInit) { |
| debug = Debug.getInstance("access"); |
| debugInit = true; |
| } |
| return debug; |
| } |
| |
| /** |
| * Creates a new SocketPermission object with the specified actions. |
| * The host is expressed as a DNS name, or as a numerical IP address. |
| * Optionally, a port or a portrange may be supplied (separated |
| * from the DNS name or IP address by a colon). |
| * <p> |
| * To specify the local machine, use "localhost" as the <i>host</i>. |
| * Also note: An empty <i>host</i> String ("") is equivalent to "localhost". |
| * <p> |
| * The <i>actions</i> parameter contains a comma-separated list of the |
| * actions granted for the specified host (and port(s)). Possible actions are |
| * "connect", "listen", "accept", "resolve", or |
| * any combination of those. "resolve" is automatically added |
| * when any of the other three are specified. |
| * <p> |
| * Examples of SocketPermission instantiation are the following: |
| * <pre> |
| * nr = new SocketPermission("www.catalog.com", "connect"); |
| * nr = new SocketPermission("www.sun.com:80", "connect"); |
| * nr = new SocketPermission("*.sun.com", "connect"); |
| * nr = new SocketPermission("*.edu", "resolve"); |
| * nr = new SocketPermission("204.160.241.0", "connect"); |
| * nr = new SocketPermission("localhost:1024-65535", "listen"); |
| * nr = new SocketPermission("204.160.241.0:1024-65535", "connect"); |
| * </pre> |
| * |
| * @param host the hostname or IPaddress of the computer, optionally |
| * including a colon followed by a port or port range. |
| * @param action the action string. |
| */ |
| public SocketPermission(String host, String action) { |
| super(getHost(host)); |
| // name initialized to getHost(host); NPE detected in getHost() |
| init(getName(), getMask(action)); |
| } |
| |
| |
| SocketPermission(String host, int mask) { |
| super(getHost(host)); |
| // name initialized to getHost(host); NPE detected in getHost() |
| init(getName(), mask); |
| } |
| |
| private void setDeny() { |
| defaultDeny = true; |
| } |
| |
| private static String getHost(String host) |
| { |
| if (host.equals("")) { |
| return "localhost"; |
| } else { |
| /* IPv6 literal address used in this context should follow |
| * the format specified in RFC 2732; |
| * if not, we try to solve the unambiguous case |
| */ |
| int ind; |
| if (host.charAt(0) != '[') { |
| if ((ind = host.indexOf(':')) != host.lastIndexOf(':')) { |
| /* More than one ":", meaning IPv6 address is not |
| * in RFC 2732 format; |
| * We will rectify user errors for all unambiguious cases |
| */ |
| StringTokenizer st = new StringTokenizer(host, ":"); |
| int tokens = st.countTokens(); |
| if (tokens == 9) { |
| // IPv6 address followed by port |
| ind = host.lastIndexOf(':'); |
| host = "[" + host.substring(0, ind) + "]" + |
| host.substring(ind); |
| } else if (tokens == 8 && host.indexOf("::") == -1) { |
| // IPv6 address only, not followed by port |
| host = "[" + host + "]"; |
| } else { |
| // could be ambiguous |
| throw new IllegalArgumentException("Ambiguous"+ |
| " hostport part"); |
| } |
| } |
| } |
| return host; |
| } |
| } |
| |
| private int[] parsePort(String port) |
| throws Exception |
| { |
| |
| if (port == null || port.equals("") || port.equals("*")) { |
| return new int[] {PORT_MIN, PORT_MAX}; |
| } |
| |
| int dash = port.indexOf('-'); |
| |
| if (dash == -1) { |
| int p = Integer.parseInt(port); |
| return new int[] {p, p}; |
| } else { |
| String low = port.substring(0, dash); |
| String high = port.substring(dash+1); |
| int l,h; |
| |
| if (low.equals("")) { |
| l = PORT_MIN; |
| } else { |
| l = Integer.parseInt(low); |
| } |
| |
| if (high.equals("")) { |
| h = PORT_MAX; |
| } else { |
| h = Integer.parseInt(high); |
| } |
| if (l < 0 || h < 0 || h<l) |
| throw new IllegalArgumentException("invalid port range"); |
| |
| return new int[] {l, h}; |
| } |
| } |
| |
| /** |
| * Initialize the SocketPermission object. We don't do any DNS lookups |
| * as this point, instead we hold off until the implies method is |
| * called. |
| */ |
| private void init(String host, int mask) { |
| // Set the integer mask that represents the actions |
| |
| if ((mask & ALL) != mask) |
| throw new IllegalArgumentException("invalid actions mask"); |
| |
| // always OR in RESOLVE if we allow any of the others |
| this.mask = mask | RESOLVE; |
| |
| // Parse the host name. A name has up to three components, the |
| // hostname, a port number, or two numbers representing a port |
| // range. "www.sun.com:8080-9090" is a valid host name. |
| |
| // With IPv6 an address can be 2010:836B:4179::836B:4179 |
| // An IPv6 address needs to be enclose in [] |
| // For ex: [2010:836B:4179::836B:4179]:8080-9090 |
| // Refer to RFC 2732 for more information. |
| |
| int rb = 0 ; |
| int start = 0, end = 0; |
| int sep = -1; |
| String hostport = host; |
| if (host.charAt(0) == '[') { |
| start = 1; |
| rb = host.indexOf(']'); |
| if (rb != -1) { |
| host = host.substring(start, rb); |
| } else { |
| throw new |
| IllegalArgumentException("invalid host/port: "+host); |
| } |
| sep = hostport.indexOf(':', rb+1); |
| } else { |
| start = 0; |
| sep = host.indexOf(':', rb); |
| end = sep; |
| if (sep != -1) { |
| host = host.substring(start, end); |
| } |
| } |
| |
| if (sep != -1) { |
| String port = hostport.substring(sep+1); |
| try { |
| portrange = parsePort(port); |
| } catch (Exception e) { |
| throw new |
| IllegalArgumentException("invalid port range: "+port); |
| } |
| } else { |
| portrange = new int[] { PORT_MIN, PORT_MAX }; |
| } |
| |
| hostname = host; |
| |
| // is this a domain wildcard specification |
| if (host.lastIndexOf('*') > 0) { |
| throw new |
| IllegalArgumentException("invalid host wildcard specification"); |
| } else if (host.startsWith("*")) { |
| wildcard = true; |
| if (host.equals("*")) { |
| cname = ""; |
| } else if (host.startsWith("*.")) { |
| cname = host.substring(1).toLowerCase(); |
| } else { |
| throw new |
| IllegalArgumentException("invalid host wildcard specification"); |
| } |
| return; |
| } else { |
| if (host.length() > 0) { |
| // see if we are being initialized with an IP address. |
| char ch = host.charAt(0); |
| if (ch == ':' || Character.digit(ch, 16) != -1) { |
| byte ip[] = IPAddressUtil.textToNumericFormatV4(host); |
| if (ip == null) { |
| ip = IPAddressUtil.textToNumericFormatV6(host); |
| } |
| if (ip != null) { |
| try { |
| addresses = |
| new InetAddress[] |
| {InetAddress.getByAddress(ip) }; |
| init_with_ip = true; |
| } catch (UnknownHostException uhe) { |
| // this shouldn't happen |
| invalid = true; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Convert an action string to an integer actions mask. |
| * |
| * @param action the action string |
| * @return the action mask |
| */ |
| private static int getMask(String action) { |
| |
| if (action == null) { |
| throw new NullPointerException("action can't be null"); |
| } |
| |
| if (action.equals("")) { |
| throw new IllegalArgumentException("action can't be empty"); |
| } |
| |
| int mask = NONE; |
| |
| // Check against use of constants (used heavily within the JDK) |
| if (action == SecurityConstants.SOCKET_RESOLVE_ACTION) { |
| return RESOLVE; |
| } else if (action == SecurityConstants.SOCKET_CONNECT_ACTION) { |
| return CONNECT; |
| } else if (action == SecurityConstants.SOCKET_LISTEN_ACTION) { |
| return LISTEN; |
| } else if (action == SecurityConstants.SOCKET_ACCEPT_ACTION) { |
| return ACCEPT; |
| } else if (action == SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION) { |
| return CONNECT|ACCEPT; |
| } |
| |
| char[] a = action.toCharArray(); |
| |
| int i = a.length - 1; |
| if (i < 0) |
| return mask; |
| |
| while (i != -1) { |
| char c; |
| |
| // skip whitespace |
| while ((i!=-1) && ((c = a[i]) == ' ' || |
| c == '\r' || |
| c == '\n' || |
| c == '\f' || |
| c == '\t')) |
| i--; |
| |
| // check for the known strings |
| int matchlen; |
| |
| if (i >= 6 && (a[i-6] == 'c' || a[i-6] == 'C') && |
| (a[i-5] == 'o' || a[i-5] == 'O') && |
| (a[i-4] == 'n' || a[i-4] == 'N') && |
| (a[i-3] == 'n' || a[i-3] == 'N') && |
| (a[i-2] == 'e' || a[i-2] == 'E') && |
| (a[i-1] == 'c' || a[i-1] == 'C') && |
| (a[i] == 't' || a[i] == 'T')) |
| { |
| matchlen = 7; |
| mask |= CONNECT; |
| |
| } else if (i >= 6 && (a[i-6] == 'r' || a[i-6] == 'R') && |
| (a[i-5] == 'e' || a[i-5] == 'E') && |
| (a[i-4] == 's' || a[i-4] == 'S') && |
| (a[i-3] == 'o' || a[i-3] == 'O') && |
| (a[i-2] == 'l' || a[i-2] == 'L') && |
| (a[i-1] == 'v' || a[i-1] == 'V') && |
| (a[i] == 'e' || a[i] == 'E')) |
| { |
| matchlen = 7; |
| mask |= RESOLVE; |
| |
| } else if (i >= 5 && (a[i-5] == 'l' || a[i-5] == 'L') && |
| (a[i-4] == 'i' || a[i-4] == 'I') && |
| (a[i-3] == 's' || a[i-3] == 'S') && |
| (a[i-2] == 't' || a[i-2] == 'T') && |
| (a[i-1] == 'e' || a[i-1] == 'E') && |
| (a[i] == 'n' || a[i] == 'N')) |
| { |
| matchlen = 6; |
| mask |= LISTEN; |
| |
| } else if (i >= 5 && (a[i-5] == 'a' || a[i-5] == 'A') && |
| (a[i-4] == 'c' || a[i-4] == 'C') && |
| (a[i-3] == 'c' || a[i-3] == 'C') && |
| (a[i-2] == 'e' || a[i-2] == 'E') && |
| (a[i-1] == 'p' || a[i-1] == 'P') && |
| (a[i] == 't' || a[i] == 'T')) |
| { |
| matchlen = 6; |
| mask |= ACCEPT; |
| |
| } else { |
| // parse error |
| throw new IllegalArgumentException( |
| "invalid permission: " + action); |
| } |
| |
| // make sure we didn't just match the tail of a word |
| // like "ackbarfaccept". Also, skip to the comma. |
| boolean seencomma = false; |
| while (i >= matchlen && !seencomma) { |
| switch(a[i-matchlen]) { |
| case ',': |
| seencomma = true; |
| /*FALLTHROUGH*/ |
| case ' ': case '\r': case '\n': |
| case '\f': case '\t': |
| break; |
| default: |
| throw new IllegalArgumentException( |
| "invalid permission: " + action); |
| } |
| i--; |
| } |
| |
| // point i at the location of the comma minus one (or -1). |
| i -= matchlen; |
| } |
| |
| return mask; |
| } |
| |
| private boolean isUntrusted() |
| throws UnknownHostException |
| { |
| if (trusted) return false; |
| if (invalid || untrusted) return true; |
| try { |
| if (!trustNameService && (defaultDeny || |
| sun.net.www.URLConnection.isProxiedHost(hostname))) { |
| if (this.cname == null) { |
| this.getCanonName(); |
| } |
| if (!match(cname, hostname)) { |
| // Last chance |
| if (!authorized(hostname, addresses[0].getAddress())) { |
| untrusted = true; |
| Debug debug = getDebug(); |
| if (debug != null && Debug.isOn("failure")) { |
| debug.println("socket access restriction: proxied host " + "(" + addresses[0] + ")" + " does not match " + cname + " from reverse lookup"); |
| } |
| return true; |
| } |
| } |
| trusted = true; |
| } |
| } catch (UnknownHostException uhe) { |
| invalid = true; |
| throw uhe; |
| } |
| return false; |
| } |
| |
| /** |
| * attempt to get the fully qualified domain name |
| * |
| */ |
| void getCanonName() |
| throws UnknownHostException |
| { |
| if (cname != null || invalid || untrusted) return; |
| |
| // attempt to get the canonical name |
| |
| try { |
| // first get the IP addresses if we don't have them yet |
| // this is because we need the IP address to then get |
| // FQDN. |
| if (addresses == null) { |
| getIP(); |
| } |
| |
| // we have to do this check, otherwise we might not |
| // get the fully qualified domain name |
| if (init_with_ip) { |
| cname = addresses[0].getHostName(false).toLowerCase(); |
| } else { |
| cname = InetAddress.getByName(addresses[0].getHostAddress()). |
| getHostName(false).toLowerCase(); |
| } |
| } catch (UnknownHostException uhe) { |
| invalid = true; |
| throw uhe; |
| } |
| } |
| |
| private transient String cdomain, hdomain; |
| |
| private boolean match(String cname, String hname) { |
| String a = cname.toLowerCase(); |
| String b = hname.toLowerCase(); |
| if (a.startsWith(b) && |
| ((a.length() == b.length()) || (a.charAt(b.length()) == '.'))) |
| return true; |
| if (cdomain == null) { |
| cdomain = RegisteredDomain.getRegisteredDomain(a); |
| } |
| if (hdomain == null) { |
| hdomain = RegisteredDomain.getRegisteredDomain(b); |
| } |
| |
| return cdomain.length() != 0 && hdomain.length() != 0 |
| && cdomain.equals(hdomain); |
| } |
| |
| private boolean authorized(String cname, byte[] addr) { |
| if (addr.length == 4) |
| return authorizedIPv4(cname, addr); |
| else if (addr.length == 16) |
| return authorizedIPv6(cname, addr); |
| else |
| return false; |
| } |
| |
| private boolean authorizedIPv4(String cname, byte[] addr) { |
| String authHost = ""; |
| InetAddress auth; |
| |
| try { |
| authHost = "auth." + |
| (addr[3] & 0xff) + "." + (addr[2] & 0xff) + "." + |
| (addr[1] & 0xff) + "." + (addr[0] & 0xff) + |
| ".in-addr.arpa"; |
| // Following check seems unnecessary |
| // auth = InetAddress.getAllByName0(authHost, false)[0]; |
| authHost = hostname + '.' + authHost; |
| auth = InetAddress.getAllByName0(authHost, false)[0]; |
| if (auth.equals(InetAddress.getByAddress(addr))) { |
| return true; |
| } |
| Debug debug = getDebug(); |
| if (debug != null && Debug.isOn("failure")) { |
| debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr)); |
| } |
| } catch (UnknownHostException uhe) { |
| Debug debug = getDebug(); |
| if (debug != null && Debug.isOn("failure")) { |
| debug.println("socket access restriction: forward lookup failed for " + authHost); |
| } |
| } |
| return false; |
| } |
| |
| private boolean authorizedIPv6(String cname, byte[] addr) { |
| String authHost = ""; |
| InetAddress auth; |
| |
| try { |
| StringBuffer sb = new StringBuffer(39); |
| |
| for (int i = 15; i >= 0; i--) { |
| sb.append(Integer.toHexString(((addr[i]) & 0x0f))); |
| sb.append('.'); |
| sb.append(Integer.toHexString(((addr[i] >> 4) & 0x0f))); |
| sb.append('.'); |
| } |
| authHost = "auth." + sb.toString() + "IP6.ARPA"; |
| //auth = InetAddress.getAllByName0(authHost, false)[0]; |
| authHost = hostname + '.' + authHost; |
| auth = InetAddress.getAllByName0(authHost, false)[0]; |
| if (auth.equals(InetAddress.getByAddress(addr))) |
| return true; |
| Debug debug = getDebug(); |
| if (debug != null && Debug.isOn("failure")) { |
| debug.println("socket access restriction: IP address of " + auth + " != " + InetAddress.getByAddress(addr)); |
| } |
| } catch (UnknownHostException uhe) { |
| Debug debug = getDebug(); |
| if (debug != null && Debug.isOn("failure")) { |
| debug.println("socket access restriction: forward lookup failed for " + authHost); |
| } |
| } |
| return false; |
| } |
| |
| |
| /** |
| * get IP addresses. Sets invalid to true if we can't get them. |
| * |
| */ |
| void getIP() |
| throws UnknownHostException |
| { |
| if (addresses != null || wildcard || invalid) return; |
| |
| try { |
| // now get all the IP addresses |
| String host; |
| if (getName().charAt(0) == '[') { |
| // Literal IPv6 address |
| host = getName().substring(1, getName().indexOf(']')); |
| } else { |
| int i = getName().indexOf(":"); |
| if (i == -1) |
| host = getName(); |
| else { |
| host = getName().substring(0,i); |
| } |
| } |
| |
| addresses = |
| new InetAddress[] {InetAddress.getAllByName0(host, false)[0]}; |
| |
| } catch (UnknownHostException uhe) { |
| invalid = true; |
| throw uhe; |
| } catch (IndexOutOfBoundsException iobe) { |
| invalid = true; |
| throw new UnknownHostException(getName()); |
| } |
| } |
| |
| /** |
| * Checks if this socket permission object "implies" the |
| * specified permission. |
| * <P> |
| * More specifically, this method first ensures that all of the following |
| * are true (and returns false if any of them are not):<p> |
| * <ul> |
| * <li> <i>p</i> is an instanceof SocketPermission,<p> |
| * <li> <i>p</i>'s actions are a proper subset of this |
| * object's actions, and<p> |
| * <li> <i>p</i>'s port range is included in this port range. Note: |
| * port range is ignored when p only contains the action, 'resolve'.<p> |
| * </ul> |
| * |
| * Then <code>implies</code> checks each of the following, in order, |
| * and for each returns true if the stated condition is true:<p> |
| * <ul> |
| * <li> If this object was initialized with a single IP address and one of <i>p</i>'s |
| * IP addresses is equal to this object's IP address.<p> |
| * <li>If this object is a wildcard domain (such as *.sun.com), and |
| * <i>p</i>'s canonical name (the name without any preceding *) |
| * ends with this object's canonical host name. For example, *.sun.com |
| * implies *.eng.sun.com..<p> |
| * <li>If this object was not initialized with a single IP address, and one of this |
| * object's IP addresses equals one of <i>p</i>'s IP addresses.<p> |
| * <li>If this canonical name equals <i>p</i>'s canonical name.<p> |
| * </ul> |
| * |
| * If none of the above are true, <code>implies</code> returns false. |
| * @param p the permission to check against. |
| * |
| * @return true if the specified permission is implied by this object, |
| * false if not. |
| */ |
| |
| public boolean implies(Permission p) { |
| int i,j; |
| |
| if (!(p instanceof SocketPermission)) |
| return false; |
| |
| if (p == this) |
| return true; |
| |
| SocketPermission that = (SocketPermission) p; |
| |
| return ((this.mask & that.mask) == that.mask) && |
| impliesIgnoreMask(that); |
| } |
| |
| /** |
| * Checks if the incoming Permission's action are a proper subset of |
| * the this object's actions. |
| * <P> |
| * Check, in the following order: |
| * <ul> |
| * <li> Checks that "p" is an instanceof a SocketPermission |
| * <li> Checks that "p"'s actions are a proper subset of the |
| * current object's actions. |
| * <li> Checks that "p"'s port range is included in this port range |
| * <li> If this object was initialized with an IP address, checks that |
| * one of "p"'s IP addresses is equal to this object's IP address. |
| * <li> If either object is a wildcard domain (i.e., "*.sun.com"), |
| * attempt to match based on the wildcard. |
| * <li> If this object was not initialized with an IP address, attempt |
| * to find a match based on the IP addresses in both objects. |
| * <li> Attempt to match on the canonical hostnames of both objects. |
| * </ul> |
| * @param p the incoming permission request |
| * |
| * @return true if "permission" is a proper subset of the current object, |
| * false if not. |
| */ |
| |
| boolean impliesIgnoreMask(SocketPermission that) { |
| int i,j; |
| |
| if ((that.mask & RESOLVE) != that.mask) { |
| // check port range |
| if ((that.portrange[0] < this.portrange[0]) || |
| (that.portrange[1] > this.portrange[1])) { |
| return false; |
| } |
| } |
| |
| // allow a "*" wildcard to always match anything |
| if (this.wildcard && "".equals(this.cname)) |
| return true; |
| |
| // return if either one of these NetPerm objects are invalid... |
| if (this.invalid || that.invalid) { |
| return compareHostnames(that); |
| } |
| |
| try { |
| if (this.init_with_ip) { // we only check IP addresses |
| if (that.wildcard) |
| return false; |
| |
| if (that.init_with_ip) { |
| return (this.addresses[0].equals(that.addresses[0])); |
| } else { |
| if (that.addresses == null) { |
| that.getIP(); |
| } |
| for (i=0; i < that.addresses.length; i++) { |
| if (this.addresses[0].equals(that.addresses[i])) |
| return true; |
| } |
| } |
| // since "this" was initialized with an IP address, we |
| // don't check any other cases |
| return false; |
| } |
| |
| // check and see if we have any wildcards... |
| if (this.wildcard || that.wildcard) { |
| // if they are both wildcards, return true iff |
| // that's cname ends with this cname (i.e., *.sun.com |
| // implies *.eng.sun.com) |
| if (this.wildcard && that.wildcard) |
| return (that.cname.endsWith(this.cname)); |
| |
| // a non-wildcard can't imply a wildcard |
| if (that.wildcard) |
| return false; |
| |
| // this is a wildcard, lets see if that's cname ends with |
| // it... |
| if (that.cname == null) { |
| that.getCanonName(); |
| } |
| return (that.cname.endsWith(this.cname)); |
| } |
| |
| // comapare IP addresses |
| if (this.addresses == null) { |
| this.getIP(); |
| } |
| |
| if (that.addresses == null) { |
| that.getIP(); |
| } |
| |
| if (!(that.init_with_ip && this.isUntrusted())) { |
| for (j = 0; j < this.addresses.length; j++) { |
| for (i=0; i < that.addresses.length; i++) { |
| if (this.addresses[j].equals(that.addresses[i])) |
| return true; |
| } |
| } |
| |
| // XXX: if all else fails, compare hostnames? |
| // Do we really want this? |
| if (this.cname == null) { |
| this.getCanonName(); |
| } |
| |
| if (that.cname == null) { |
| that.getCanonName(); |
| } |
| |
| return (this.cname.equalsIgnoreCase(that.cname)); |
| } |
| |
| } catch (UnknownHostException uhe) { |
| return compareHostnames(that); |
| } |
| |
| // make sure the first thing that is done here is to return |
| // false. If not, uncomment the return false in the above catch. |
| |
| return false; |
| } |
| |
| private boolean compareHostnames(SocketPermission that) { |
| // we see if the original names/IPs passed in were equal. |
| |
| String thisHost = hostname; |
| String thatHost = that.hostname; |
| |
| if (thisHost == null) |
| return false; |
| else |
| return thisHost.equalsIgnoreCase(thatHost); |
| } |
| |
| /** |
| * Checks two SocketPermission objects for equality. |
| * <P> |
| * @param obj the object to test for equality with this object. |
| * |
| * @return true if <i>obj</i> is a SocketPermission, and has the |
| * same hostname, port range, and actions as this |
| * SocketPermission object. However, port range will be ignored |
| * in the comparison if <i>obj</i> only contains the action, 'resolve'. |
| */ |
| public boolean equals(Object obj) { |
| if (obj == this) |
| return true; |
| |
| if (! (obj instanceof SocketPermission)) |
| return false; |
| |
| SocketPermission that = (SocketPermission) obj; |
| |
| //this is (overly?) complex!!! |
| |
| // check the mask first |
| if (this.mask != that.mask) return false; |
| |
| if ((that.mask & RESOLVE) != that.mask) { |
| // now check the port range... |
| if ((this.portrange[0] != that.portrange[0]) || |
| (this.portrange[1] != that.portrange[1])) { |
| return false; |
| } |
| } |
| |
| // short cut. This catches: |
| // "crypto" equal to "crypto", or |
| // "1.2.3.4" equal to "1.2.3.4.", or |
| // "*.edu" equal to "*.edu", but it |
| // does not catch "crypto" equal to |
| // "crypto.eng.sun.com". |
| |
| if (this.getName().equalsIgnoreCase(that.getName())) { |
| return true; |
| } |
| |
| // we now attempt to get the Canonical (FQDN) name and |
| // compare that. If this fails, about all we can do is return |
| // false. |
| |
| try { |
| this.getCanonName(); |
| that.getCanonName(); |
| } catch (UnknownHostException uhe) { |
| return false; |
| } |
| |
| if (this.invalid || that.invalid) |
| return false; |
| |
| if (this.cname != null) { |
| return this.cname.equalsIgnoreCase(that.cname); |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Returns the hash code value for this object. |
| * |
| * @return a hash code value for this object. |
| */ |
| |
| public int hashCode() { |
| /* |
| * If this SocketPermission was initialized with an IP address |
| * or a wildcard, use getName().hashCode(), otherwise use |
| * the hashCode() of the host name returned from |
| * java.net.InetAddress.getHostName method. |
| */ |
| |
| if (init_with_ip || wildcard) { |
| return this.getName().hashCode(); |
| } |
| |
| try { |
| getCanonName(); |
| } catch (UnknownHostException uhe) { |
| |
| } |
| |
| if (invalid || cname == null) |
| return this.getName().hashCode(); |
| else |
| return this.cname.hashCode(); |
| } |
| |
| /** |
| * Return the current action mask. |
| * |
| * @return the actions mask. |
| */ |
| |
| int getMask() { |
| return mask; |
| } |
| |
| /** |
| * Returns the "canonical string representation" of the actions in the |
| * specified mask. |
| * Always returns present actions in the following order: |
| * connect, listen, accept, resolve. |
| * |
| * @param mask a specific integer action mask to translate into a string |
| * @return the canonical string representation of the actions |
| */ |
| private static String getActions(int mask) |
| { |
| StringBuilder sb = new StringBuilder(); |
| boolean comma = false; |
| |
| if ((mask & CONNECT) == CONNECT) { |
| comma = true; |
| sb.append("connect"); |
| } |
| |
| if ((mask & LISTEN) == LISTEN) { |
| if (comma) sb.append(','); |
| else comma = true; |
| sb.append("listen"); |
| } |
| |
| if ((mask & ACCEPT) == ACCEPT) { |
| if (comma) sb.append(','); |
| else comma = true; |
| sb.append("accept"); |
| } |
| |
| |
| if ((mask & RESOLVE) == RESOLVE) { |
| if (comma) sb.append(','); |
| else comma = true; |
| sb.append("resolve"); |
| } |
| |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns the canonical string representation of the actions. |
| * Always returns present actions in the following order: |
| * connect, listen, accept, resolve. |
| * |
| * @return the canonical string representation of the actions. |
| */ |
| public String getActions() |
| { |
| if (actions == null) |
| actions = getActions(this.mask); |
| |
| return actions; |
| } |
| |
| /** |
| * Returns a new PermissionCollection object for storing SocketPermission |
| * objects. |
| * <p> |
| * SocketPermission objects must be stored in a manner that allows them |
| * to be inserted into the collection in any order, but that also enables the |
| * PermissionCollection <code>implies</code> |
| * method to be implemented in an efficient (and consistent) manner. |
| * |
| * @return a new PermissionCollection object suitable for storing SocketPermissions. |
| */ |
| |
| public PermissionCollection newPermissionCollection() { |
| return new SocketPermissionCollection(); |
| } |
| |
| /** |
| * WriteObject is called to save the state of the SocketPermission |
| * to a stream. The actions are serialized, and the superclass |
| * takes care of the name. |
| */ |
| private synchronized void writeObject(java.io.ObjectOutputStream s) |
| throws IOException |
| { |
| // Write out the actions. The superclass takes care of the name |
| // call getActions to make sure actions field is initialized |
| if (actions == null) |
| getActions(); |
| s.defaultWriteObject(); |
| } |
| |
| /** |
| * readObject is called to restore the state of the SocketPermission from |
| * a stream. |
| */ |
| private synchronized void readObject(java.io.ObjectInputStream s) |
| throws IOException, ClassNotFoundException |
| { |
| // Read in the action, then initialize the rest |
| s.defaultReadObject(); |
| init(getName(),getMask(actions)); |
| } |
| |
| /* |
| public String toString() |
| { |
| StringBuffer s = new StringBuffer(super.toString() + "\n" + |
| "cname = " + cname + "\n" + |
| "wildcard = " + wildcard + "\n" + |
| "invalid = " + invalid + "\n" + |
| "portrange = " + portrange[0] + "," + portrange[1] + "\n"); |
| if (addresses != null) for (int i=0; i<addresses.length; i++) { |
| s.append( addresses[i].getHostAddress()); |
| s.append("\n"); |
| } else { |
| s.append("(no addresses)\n"); |
| } |
| |
| return s.toString(); |
| } |
| |
| public static void main(String args[]) throws Exception { |
| SocketPermission this_ = new SocketPermission(args[0], "connect"); |
| SocketPermission that_ = new SocketPermission(args[1], "connect"); |
| System.out.println("-----\n"); |
| System.out.println("this.implies(that) = " + this_.implies(that_)); |
| System.out.println("-----\n"); |
| System.out.println("this = "+this_); |
| System.out.println("-----\n"); |
| System.out.println("that = "+that_); |
| System.out.println("-----\n"); |
| |
| SocketPermissionCollection nps = new SocketPermissionCollection(); |
| nps.add(this_); |
| nps.add(new SocketPermission("www-leland.stanford.edu","connect")); |
| nps.add(new SocketPermission("www-sun.com","connect")); |
| System.out.println("nps.implies(that) = " + nps.implies(that_)); |
| System.out.println("-----\n"); |
| } |
| */ |
| } |
| |
| /** |
| |
| if (init'd with IP, key is IP as string) |
| if wildcard, its the wild card |
| else its the cname? |
| |
| * |
| * @see java.security.Permission |
| * @see java.security.Permissions |
| * @see java.security.PermissionCollection |
| * |
| * |
| * @author Roland Schemers |
| * |
| * @serial include |
| */ |
| |
| final class SocketPermissionCollection extends PermissionCollection |
| implements Serializable |
| { |
| // Not serialized; see serialization section at end of class |
| private transient List perms; |
| |
| /** |
| * Create an empty SocketPermissions object. |
| * |
| */ |
| |
| public SocketPermissionCollection() { |
| perms = new ArrayList(); |
| } |
| |
| /** |
| * Adds a permission to the SocketPermissions. The key for the hash is |
| * the name in the case of wildcards, or all the IP addresses. |
| * |
| * @param permission the Permission object to add. |
| * |
| * @exception IllegalArgumentException - if the permission is not a |
| * SocketPermission |
| * |
| * @exception SecurityException - if this SocketPermissionCollection object |
| * has been marked readonly |
| */ |
| |
| public void add(Permission permission) |
| { |
| if (! (permission instanceof SocketPermission)) |
| throw new IllegalArgumentException("invalid permission: "+ |
| permission); |
| if (isReadOnly()) |
| throw new SecurityException( |
| "attempt to add a Permission to a readonly PermissionCollection"); |
| |
| // optimization to ensure perms most likely to be tested |
| // show up early (4301064) |
| synchronized (this) { |
| perms.add(0, permission); |
| } |
| } |
| |
| /** |
| * Check and see if this collection of permissions implies the permissions |
| * expressed in "permission". |
| * |
| * @param p the Permission object to compare |
| * |
| * @return true if "permission" is a proper subset of a permission in |
| * the collection, false if not. |
| */ |
| |
| public boolean implies(Permission permission) |
| { |
| if (! (permission instanceof SocketPermission)) |
| return false; |
| |
| SocketPermission np = (SocketPermission) permission; |
| |
| int desired = np.getMask(); |
| int effective = 0; |
| int needed = desired; |
| |
| synchronized (this) { |
| int len = perms.size(); |
| //System.out.println("implies "+np); |
| for (int i = 0; i < len; i++) { |
| SocketPermission x = (SocketPermission) perms.get(i); |
| //System.out.println(" trying "+x); |
| if (((needed & x.getMask()) != 0) && x.impliesIgnoreMask(np)) { |
| effective |= x.getMask(); |
| if ((effective & desired) == desired) |
| return true; |
| needed = (desired ^ effective); |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns an enumeration of all the SocketPermission objects in the |
| * container. |
| * |
| * @return an enumeration of all the SocketPermission objects. |
| */ |
| |
| public Enumeration elements() { |
| // Convert Iterator into Enumeration |
| synchronized (this) { |
| return Collections.enumeration(perms); |
| } |
| } |
| |
| private static final long serialVersionUID = 2787186408602843674L; |
| |
| // Need to maintain serialization interoperability with earlier releases, |
| // which had the serializable field: |
| |
| // |
| // The SocketPermissions for this set. |
| // @serial |
| // |
| // private Vector permissions; |
| |
| /** |
| * @serialField permissions java.util.Vector |
| * A list of the SocketPermissions for this set. |
| */ |
| private static final ObjectStreamField[] serialPersistentFields = { |
| new ObjectStreamField("permissions", Vector.class), |
| }; |
| |
| /** |
| * @serialData "permissions" field (a Vector containing the SocketPermissions). |
| */ |
| /* |
| * Writes the contents of the perms field out as a Vector for |
| * serialization compatibility with earlier releases. |
| */ |
| private void writeObject(ObjectOutputStream out) throws IOException { |
| // Don't call out.defaultWriteObject() |
| |
| // Write out Vector |
| Vector permissions = new Vector(perms.size()); |
| |
| synchronized (this) { |
| permissions.addAll(perms); |
| } |
| |
| ObjectOutputStream.PutField pfields = out.putFields(); |
| pfields.put("permissions", permissions); |
| out.writeFields(); |
| } |
| |
| /* |
| * Reads in a Vector of SocketPermissions and saves them in the perms field. |
| */ |
| private void readObject(ObjectInputStream in) throws IOException, |
| ClassNotFoundException { |
| // Don't call in.defaultReadObject() |
| |
| // Read in serialized fields |
| ObjectInputStream.GetField gfields = in.readFields(); |
| |
| // Get the one we want |
| Vector permissions = (Vector)gfields.get("permissions", null); |
| perms = new ArrayList(permissions.size()); |
| perms.addAll(permissions); |
| } |
| } |
