/
SocketPermission.java
1518 lines (1343 loc) · 51.6 KB
/
SocketPermission.java
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/*
* Copyright (c) 1997, 2024, 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.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import java.io.Serializable;
import java.security.AccessController;
import java.security.Permission;
import java.security.PermissionCollection;
import java.security.PrivilegedAction;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Locale;
import java.util.Map;
import java.util.StringJoiner;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.concurrent.ConcurrentHashMap;
import sun.net.util.IPAddressUtil;
import sun.net.PortConfig;
import sun.security.action.GetBooleanAction;
import sun.security.util.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 "*.example.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.
* The special port value {@code 0} refers to the entire <i>ephemeral</i>
* port range. This is a fixed range of ports a system may use to
* allocate dynamic ports from. The actual range may be system dependent.
* <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" and
* means the ability to bind to a specified port.
* 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("foo.example.com:7777", "connect,accept");
* </pre>
*
* is granted to some code, it allows that code to connect to port 7777 on
* {@code foo.example.com}, 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.
*
* @spec https://www.rfc-editor.org/info/rfc2732
* RFC 2732: Format for Literal IPv6 Addresses in URL's
* @see java.security.Permissions
* @see SocketPermission
*
*
* @author Marianne Mueller
* @author Roland Schemers
* @since 1.2
*
* @serial exclude
*/
public final class SocketPermission extends Permission
implements java.io.Serializable
{
@java.io.Serial
private static final long serialVersionUID = -7204263841984476862L;
/**
* Connect to host:port
*/
private static final int CONNECT = 0x1;
/**
* Listen on host:port
*/
private static final int LISTEN = 0x2;
/**
* Accept a connection from host:port
*/
private static final int ACCEPT = 0x4;
/**
* Resolve DNS queries
*/
private static final int RESOLVE = 0x8;
/**
* No actions
*/
private static final int NONE = 0x0;
/**
* All actions
*/
private static final int ALL = CONNECT|LISTEN|ACCEPT|RESOLVE;
// various port constants
private static final int PORT_MIN = 0;
private static final int PORT_MAX = 65535;
// 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. "*.example.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 final boolean trustNameService = GetBooleanAction.privilegedGetProperty("sun.net.trustNameService");
private static Debug debug = null;
private static boolean debugInit = false;
// lazy initializer
private static class EphemeralRange {
static final int low = initEphemeralPorts("low");
static final int high = initEphemeralPorts("high");
}
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.example.com", "connect");
* nr = new SocketPermission("www.example.com:80", "connect");
* nr = new SocketPermission("*.example.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 IP address of the computer, optionally
* including a colon followed by a port or port range.
* @param action the action string.
*
* @throws NullPointerException if any parameters are null
* @throws IllegalArgumentException if the format of {@code host} is
* invalid, or if the {@code action} string is empty, malformed, or
* contains an action other than the specified possible actions
*/
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.isEmpty()) {
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 unambiguous 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.contains("::")) {
// 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) {
if (port == null || port.isEmpty() || 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.isEmpty()) {
l = PORT_MIN;
} else {
l = Integer.parseInt(low);
}
if (high.isEmpty()) {
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};
}
}
/**
* Returns true if the permission has specified zero
* as its value (or lower bound) signifying the ephemeral range
*/
private boolean includesEphemerals() {
return portrange[0] == 0;
}
/**
* 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.example.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(Locale.ROOT);
} else {
throw new
IllegalArgumentException("invalid host wildcard specification");
}
return;
} else {
if (!host.isEmpty()) {
// see if we are being initialized with an IP address.
char ch = host.charAt(0);
if (ch == ':' || IPAddressUtil.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.isEmpty()) {
throw new IllegalArgumentException("action can't be empty");
}
int mask = NONE;
// Use object identity comparison against known-interned strings for
// performance benefit (these values are 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;
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 (c = a[i-matchlen]) {
case ' ': case '\r': case '\n':
case '\f': case '\t':
break;
default:
if (c == ',' && i > matchlen) {
seencomma = true;
break;
}
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(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(Locale.ROOT);
} else {
cname = InetAddress.getByName(addresses[0].getHostAddress()).
getHostName(false).toLowerCase(Locale.ROOT);
}
} catch (UnknownHostException uhe) {
invalid = true;
throw uhe;
}
}
private transient String cdomain, hdomain;
/**
* previously we allowed domain names to be specified in IDN ACE form
* Need to check for that and convert to Unicode
*/
private static String checkForIDN(String name) {
if (name.startsWith("xn--") || name.contains(".xn--")) {
return IDN.toUnicode(name);
} else {
return name;
}
}
private boolean match(String cname, String hname) {
String a = checkForIDN(cname.toLowerCase(Locale.ROOT));
String b = checkForIDN(hname.toLowerCase(Locale.ROOT));
if (a.startsWith(b) &&
((a.length() == b.length()) || (a.charAt(b.length()) == '.'))) {
return true;
}
if (cdomain == null) {
cdomain = RegisteredDomain.from(a)
.map(RegisteredDomain::name)
.orElse(a);
}
if (hdomain == null) {
hdomain = RegisteredDomain.from(b)
.map(RegisteredDomain::name)
.orElse(b);
}
return !cdomain.isEmpty() && !hdomain.isEmpty() && cdomain.equals(hdomain);
}
private boolean authorized(byte[] addr) {
if (addr.length == 4)
return authorizedIPv4(addr);
else if (addr.length == 16)
return authorizedIPv6(addr);
else
return false;
}
private boolean authorizedIPv4(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(byte[] addr) {
String authHost = "";
InetAddress auth;
try {
StringBuilder sb = new StringBuilder(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):
* <ul>
* <li> <i>p</i> is an instanceof SocketPermission,
* <li> <i>p</i>'s actions are a proper subset of this
* object's actions, and
* <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'.
* </ul>
*
* Then {@code implies} checks each of the following, in order,
* and for each returns true if the stated condition is true:
* <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.
* <li>If this object is a wildcard domain (such as *.example.com), and
* <i>p</i>'s canonical name (the name without any preceding *)
* ends with this object's canonical host name. For example, *.example.com
* implies *.foo.example.com.
* <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.
* <li>If this canonical name equals <i>p</i>'s canonical name.
* </ul>
*
* If none of the above are true, {@code implies} returns false.
* @param p the permission to check against.
*
* @return true if the specified permission is implied by this object,
* false if not.
*/
@Override
public boolean implies(Permission p) {
if (!(p instanceof SocketPermission that))
return false;
if (p == this)
return true;
return ((this.mask & that.mask) == that.mask) &&
impliesIgnoreMask(that);
}
/**
* Checks if the incoming Permission's action are a proper subset of
* 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., "*.example.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 that 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 simple port range
if ((that.portrange[0] < this.portrange[0]) ||
(that.portrange[1] > this.portrange[1])) {
// if either includes the ephemeral range, do full check
if (this.includesEphemerals() || that.includesEphemerals()) {
if (!inRange(this.portrange[0], this.portrange[1],
that.portrange[0], that.portrange[1]))
{
return false;
}
} else {
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., *.example.com
// implies *.foo.example.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));
}
// compare 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;