/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.jini.jeri.ssl;
import com.sun.jini.action.GetLongAction;
import com.sun.jini.jeri.internal.connection.BasicServerConnManager;
import com.sun.jini.jeri.internal.connection.ServerConnManager;
import com.sun.jini.jeri.internal.runtime.Util;
import com.sun.jini.logging.Levels;
import com.sun.jini.thread.Executor;
import com.sun.jini.thread.GetThreadPoolAction;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.nio.channels.SocketChannel;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.GeneralSecurityException;
import java.security.Permission;
import java.security.Principal;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.security.cert.CertPath;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ServerSocketFactory;
import javax.net.SocketFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLPeerUnverifiedException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.security.auth.Subject;
import javax.security.auth.x500.X500Principal;
import javax.security.auth.x500.X500PrivateCredential;
import net.jini.core.constraint.InvocationConstraints;
import net.jini.io.UnsupportedConstraintException;
import net.jini.jeri.Endpoint;
import net.jini.jeri.RequestDispatcher;
import net.jini.jeri.ServerEndpoint.ListenContext;
import net.jini.jeri.ServerEndpoint.ListenCookie;
import net.jini.jeri.ServerEndpoint.ListenEndpoint;
import net.jini.jeri.ServerEndpoint.ListenHandle;
import net.jini.jeri.ServerEndpoint;
import net.jini.jeri.connection.InboundRequestHandle;
import net.jini.jeri.connection.ServerConnection;
import net.jini.security.AuthenticationPermission;
import net.jini.security.Security;
import net.jini.security.SecurityContext;
/**
* Provides the implementation of SslServerEndpoint so that the implementation
* can be inherited by HttpsServerEndpoint without revealing the inheritance in
* the public API.
*
* @author Sun Microsystems, Inc.
*/
class SslServerEndpointImpl extends Utilities {
/* -- Fields -- */
/** Server logger */
static final Logger logger = serverLogger;
/**
* The maximum time a session should be used before expiring -- non-final
* to facilitate testing. Use 24 hours to allow the client, which uses
* 23.5 hours, to renegotiate a new session before the server timeout.
*/
static long maxServerSessionDuration =
((Long) Security.doPrivileged(
new GetLongAction("com.sun.jini.jeri.ssl.maxServerSessionDuration",
24 * 60 * 60 * 1000))).longValue();
/**
* Executes a Runnable in a system thread -- used for listener accept
* threads.
*/
static final Executor systemExecutor = (Executor)
Security.doPrivileged(new GetThreadPoolAction(false));
/** The default server connection manager. */
private static final ServerConnManager defaultServerConnectionManager =
new BasicServerConnManager();
/** The associated server endpoint. */
final ServerEndpoint serverEndpoint;
/** The server subject, or null if the server is anonymous. */
final Subject serverSubject;
/**
* The principals to use for authentication, or null if the server is
* anonymous.
*/
final Set serverPrincipals;
/**
* The host name that clients should use to connect to this server, or null
* if enumerateListenEndpoints should compute the default.
*/
final String serverHost;
/** The server port */
final int port;
/** The socket factory for use in the associated Endpoint. */
final SocketFactory socketFactory;
/** The server socket factory. */
final ServerSocketFactory serverSocketFactory;
/**
* The permissions needed to authenticate when listening on this endpoint,
* or null if the server is anonymous.
*/
Permission[] listenPermissions;
/** The listen endpoint. */
private final ListenEndpoint listenEndpoint;
/** The factory for creating JSSE sockets -- set by sslInit */
private SSLSocketFactory sslSocketFactory;
/**
* The authentication manager for the SSLContext for this endpoint -- set
* by sslInit.
*/
private ServerAuthManager authManager;
/** The server connection manager. */
ServerConnManager serverConnectionManager = defaultServerConnectionManager;
/* -- Methods -- */
/** Creates an instance of this class. */
SslServerEndpointImpl(ServerEndpoint serverEndpoint,
Subject serverSubject,
X500Principal[] serverPrincipals,
String serverHost,
int port,
SocketFactory socketFactory,
ServerSocketFactory serverSocketFactory)
{
this.serverEndpoint = serverEndpoint;
boolean useCurrentSubject = serverSubject == null;
if (useCurrentSubject) {
final AccessControlContext acc = AccessController.getContext();
serverSubject = (Subject) AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
return Subject.getSubject(acc);
}
});
}
this.serverPrincipals = (serverPrincipals == null)
? computePrincipals(serverSubject)
: checkPrincipals(serverPrincipals);
/* Set listenPermissions before calling hasListenPermissions */
if (this.serverPrincipals == null) {
listenPermissions = null;
} else {
listenPermissions =
new AuthenticationPermission[this.serverPrincipals.size()];
int i = 0;
for (Iterator iter = this.serverPrincipals.iterator();
iter.hasNext();
i++)
{
Principal p = (Principal) iter.next();
listenPermissions[i] = new AuthenticationPermission(
Collections.singleton(p), null, "listen");
}
}
if (this.serverPrincipals == null ||
/* Don't use current subject without any permission */
(useCurrentSubject &&
serverPrincipals != null &&
!hasListenPermissions()))
{
this.serverSubject = null;
this.listenPermissions = null;
} else {
this.serverSubject = serverSubject;
}
this.serverHost = serverHost;
if (port < 0 || port > 0xFFFF) {
throw new IllegalArgumentException("Invalid port: " + port);
}
this.port = port;
this.socketFactory = socketFactory;
this.serverSocketFactory = serverSocketFactory;
listenEndpoint = createListenEndpoint();
}
/** Computes the principals in the subject available for authentication */
private static Set computePrincipals(Subject subject) {
if (subject == null) {
return null;
}
/* Get principals from the subject */
X500PrivateCredential[] credentials =
(X500PrivateCredential[]) AccessController.doPrivileged(
new SubjectCredentials.GetAllPrivateCredentialsAction(
subject));
Set result = SubjectCredentials.getPrincipals(
subject, ANY_KEY_ALGORITHM, credentials);
/* Remove ones we don't have authentication listen permission for. */
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
for (Iterator iter = result.iterator(); iter.hasNext(); ) {
Principal p = (Principal) iter.next();
try {
sm.checkPermission(
new AuthenticationPermission(
Collections.singleton(p), null, "listen"));
} catch (SecurityException e) {
logger.log(Levels.HANDLED,
"compute principals for server endpoint " +
"caught exception",
e);
iter.remove();
}
}
}
return result.isEmpty() ? null : result;
}
/**
* Returns true if the caller has AuthenticationPermission for listen on
* this endpoint.
*/
private boolean hasListenPermissions() {
try {
checkListenPermissions(false);
return true;
} catch (SecurityException e) {
logger.log(Levels.HANDLED,
"check listen permissions for server endpoint " +
"caught exception",
e);
return false;
}
}
/**
* Checks that principals is not empty and contains no nulls, and returns
* it as a set. Returns null if no principals are specified.
*/
private static Set checkPrincipals(X500Principal[] principals) {
if (principals.length == 0) {
return null;
}
Set result = new HashSet(principals.length);
for (int i = principals.length; --i >= 0; ) {
X500Principal p = principals[i];
if (p == null) {
throw new NullPointerException(
"Server principal cannot be null");
}
result.add(p);
}
return result;
}
/**
* Initializes the sslSocketFactory and authManager fields. Wait to do
* this until needed, because creating the SSLContext requires initializing
* the secure random number generator, which can be time consuming.
*/
private void sslInit() {
assert Thread.holdsLock(this);
SSLContextInfo info = getServerSSLContextInfo(
serverSubject, serverPrincipals);
sslSocketFactory = info.sslContext.getSocketFactory();
authManager = (ServerAuthManager) info.authManager;
}
/** Returns the SSLSocketFactory, calling sslInit if needed. */
final SSLSocketFactory getSSLSocketFactory() {
synchronized (this) {
if (sslSocketFactory == null) {
sslInit();
}
}
return sslSocketFactory;
}
/** Returns the ServerAuthManager, calling sslInit if needed. */
final ServerAuthManager getAuthManager() {
synchronized (this) {
if (authManager == null) {
sslInit();
}
}
return authManager;
}
/** Returns a hash code value for this object. */
public int hashCode() {
return getClass().hashCode()
^ System.identityHashCode(serverSubject)
^ (serverPrincipals == null ? 0 : serverPrincipals.hashCode())
^ (serverHost == null ? 0 : serverHost.hashCode())
^ port
^ (socketFactory != null ? socketFactory.hashCode() : 0)
^ (serverSocketFactory != null
? serverSocketFactory.hashCode() : 0);
}
/**
* Two instances of this class are equal if they have the same actual
* class; have server subjects that compare equal using ==; have server
* principals that are either both null or are equal when compared as the
* elements of a Set; have the same server host and port; have socket
* factories that are either both null, or have the same actual class and
* are equal; and have server socket factories that are either both null,
* or have the same actual class and are equal.
*/
public boolean equals(Object object) {
if (object == null || object.getClass() != getClass()) {
return false;
}
SslServerEndpointImpl other = (SslServerEndpointImpl) object;
return serverSubject == other.serverSubject
&& safeEquals(serverPrincipals, other.serverPrincipals)
&& safeEquals(serverHost, other.serverHost)
&& port == other.port
&& Util.sameClassAndEquals(socketFactory, other.socketFactory)
&& Util.sameClassAndEquals(serverSocketFactory,
other.serverSocketFactory);
}
/** Returns a string representation of this object. */
public String toString() {
return getClassName(this) + fieldsToString();
}
/** Returns a string representation of the fields of this object. */
final String fieldsToString() {
return "[" +
(serverPrincipals == null
? ""
: serverPrincipals.toString() + ", ") +
(serverHost == null ? "" : serverHost + ":") +
port +
(serverSocketFactory != null ? ", " + serverSocketFactory : "") +
(socketFactory != null ? ", " + socketFactory : "") +
"]";
}
/* -- Implement ServerCapabilities -- */
final InvocationConstraints checkConstraints(
InvocationConstraints constraints)
throws UnsupportedConstraintException
{
try {
checkListenPermissions(false);
} catch (SecurityException e) {
if (logger.isLoggable(Levels.FAILED)) {
logThrow(logger, Levels.FAILED,
SslServerEndpoint.class, "checkConstraints",
"check constraints for {0}\nwith {1}\nthrows",
new Object[] { this, constraints },
e);
}
throw e;
}
Set clientPrincipals = getClientPrincipals(constraints);
if (clientPrincipals == null) {
clientPrincipals = Collections.singleton(UNKNOWN_PRINCIPAL);
}
Map serverKeyTypes = new HashMap();
List certPaths =
SubjectCredentials.getCertificateChains(serverSubject);
if (certPaths != null) {
for (int i = certPaths.size(); --i >= 0; ) {
CertPath chain = (CertPath) certPaths.get(i);
X509Certificate cert = SubjectCredentials.firstX509Cert(chain);
X500Principal principal = SubjectCredentials.getPrincipal(
serverSubject, cert);
if (principal != null) {
Collection keyTypes =
(Collection) serverKeyTypes.get(principal);
if (keyTypes == null) {
keyTypes = new ArrayList(1);
serverKeyTypes.put(principal, keyTypes);
}
keyTypes.add(cert.getPublicKey().getAlgorithm());
}
}
}
String[] suites = getSupportedCipherSuites();
for (int suiteIndex = suites.length; --suiteIndex >= 0; ) {
String suite = suites[suiteIndex];
String suiteKeyType = getKeyAlgorithm(suite);
Iterator sIter =
(serverPrincipals == null
? Collections.EMPTY_SET : serverPrincipals).iterator();
X500Principal server;
do {
if (sIter.hasNext()) {
server = (X500Principal) sIter.next();
assert server != null;
Collection keyTypes =
(Collection) serverKeyTypes.get(server);
if (keyTypes == null || !keyTypes.contains(suiteKeyType)) {
continue;
}
} else {
server = null;
}
Iterator cIter = clientPrincipals.iterator();
Principal client;
do {
if (cIter.hasNext()) {
client = (Principal) cIter.next();
assert client != null;
} else {
client = null;
}
InvocationConstraints unfulfilledConstraints =
getUnfulfilledConstraints(
suite, client, server, constraints);
if (unfulfilledConstraints != null) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"check constraints for {0}\n" +
"with {1}\nreturns {2}",
new Object[] {
serverEndpoint, constraints,
unfulfilledConstraints
});
}
return unfulfilledConstraints;
}
} while (client != null);
} while (server != null);
}
UnsupportedConstraintException uce =
new UnsupportedConstraintException(
"Constraints are not supported: " + constraints);
if (logger.isLoggable(Levels.FAILED)) {
logThrow(
logger, Levels.FAILED,
SslServerEndpoint.class, "checkConstraints",
"check constraints for {0}\nwith {1}\nthrows",
new Object[] { serverEndpoint, constraints },
uce);
}
throw uce;
}
/**
* Returns null if the constraints are not supported, else any integrity
* constraints required or preferred by the arguments.
*/
static InvocationConstraints getUnfulfilledConstraints(
String cipherSuite,
Principal client,
Principal server,
InvocationConstraints constraints)
{
boolean supported = false;
for (int i = 2; --i >= 0; ) {
boolean integrity = i == 0;
ConnectionContext context = ConnectionContext.getInstance(
cipherSuite, client, server, integrity,
false /* clientSide */, constraints);
if (context != null) {
if (context.getIntegrityRequired()) {
return INTEGRITY_REQUIRED;
} else if (context.getIntegrityPreferred()) {
return INTEGRITY_PREFERRED;
} else {
supported = true;
}
}
}
return supported ? InvocationConstraints.EMPTY : null;
}
/* -- Implement ServerEndpoint -- */
final Endpoint enumerateListenEndpoints(ListenContext listenContext)
throws IOException
{
Exception exception = null;
try {
String resolvedHost = this.serverHost;
if (resolvedHost == null) {
InetAddress localAddr;
try {
localAddr = (InetAddress) AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public Object run() throws UnknownHostException {
return InetAddress.getLocalHost();
}
});
} catch (PrivilegedActionException e) {
UnknownHostException uhe =
(UnknownHostException) e.getCause();
if (logger.isLoggable(Levels.FAILED)) {
logThrow(logger, Levels.FAILED, this.getClass(),
"enumerateListenEndpoints",
"InetAddress.getLocalHost() throws",
null, uhe);
}
// Remove host information if caller does not have
// privileges to see it.
try {
InetAddress.getLocalHost();
} catch (UnknownHostException te) {
throw te;
}
throw new UnknownHostException("Host name cleared due to " +
"insufficient caller " +
"permissions");
}
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
try {
sm.checkConnect(localAddr.getHostName(), -1);
} catch (SecurityException e) {
exception = e;
/* Throw new exception to not reveal host name */
throw new SecurityException(
"Access to resolve local host denied");
}
}
resolvedHost = localAddr.getHostAddress();
}
Endpoint result = createEndpoint(
resolvedHost,
checkCookie(listenContext.addListenEndpoint(listenEndpoint)));
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"enumerate listen endpoints for {0}\nreturns {1}",
new Object[] { this, result });
}
return result;
} finally {
if (exception != null && logger.isLoggable(Levels.FAILED)) {
logThrow(
logger, Levels.FAILED,
SslServerEndpointImpl.class, "enumerateListenEndpoints",
"enumerate listen endpoints for {0}\nthrows",
new Object[] { this },
exception);
}
}
}
/** Creates a listen endpoint for this server endpoint. */
ListenEndpoint createListenEndpoint() {
return new SslListenEndpoint();
}
/**
* Creates an endpoint for this server endpoint corresponding to the
* specified server host and listen cookie.
*/
Endpoint createEndpoint(String serverHost, SslListenCookie cookie) {
return SslEndpoint.getInstance(
serverHost, cookie.getPort(), socketFactory);
}
/**
* Checks that the argument is a valid listen cookie for this server
* endpoint.
*/
private SslListenCookie checkCookie(ListenCookie cookie) {
if (!(cookie instanceof SslListenCookie)) {
throw new IllegalArgumentException(
"Cookie must be of type SslListenCookie: " + cookie);
}
SslListenCookie sslListenCookie = ((SslListenCookie) cookie);
ListenEndpoint cookieListenEndpoint
= sslListenCookie.getListenEndpoint();
if (!listenEndpoint.equals(cookieListenEndpoint)) {
throw new IllegalArgumentException(
"Cookie has wrong listen endpoint: found " +
cookieListenEndpoint + ", expected " + listenEndpoint);
}
return sslListenCookie;
}
/**
* Check for permission to listen on this endpoint, but only checking
* socket permissions if checkSocket is true.
*/
final void checkListenPermissions(boolean checkSocket) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
if (checkSocket) {
sm.checkListen(port);
}
if (listenPermissions != null) {
for (int i = listenPermissions.length; --i >= 0; ) {
sm.checkPermission(listenPermissions[i]);
}
}
}
}
/** Implements ListenEndpoint */
class SslListenEndpoint extends Utilities implements ListenEndpoint {
/* inherit javadoc */
public void checkPermissions() {
checkListenPermissions(true);
}
/* inherit javadoc */
public ListenHandle listen(RequestDispatcher requestDispatcher)
throws IOException
{
if (requestDispatcher == null) {
throw new NullPointerException(
"Request dispatcher cannot be null");
}
checkCredentials();
ServerSocket serverSocket = serverSocketFactory != null
? serverSocketFactory.createServerSocket(port)
: new ServerSocket(port);
return createListenHandle(requestDispatcher, serverSocket);
}
/**
* Check that the subject has credentials for the principals specified
* when the server endpoint was created.
*/
private void checkCredentials() throws UnsupportedConstraintException {
if (serverSubject == null) {
return;
}
checkListenPermissions(false);
Set principals = serverSubject.getPrincipals();
/* Keep track of progress; remove entry when check is done */
Map progress = new HashMap(serverPrincipals.size());
for (Iterator i = serverPrincipals.iterator(); i.hasNext(); ) {
X500Principal p = (X500Principal) i.next();
if (!principals.contains(p)) {
throw new UnsupportedConstraintException(
"Missing principal: " + p);
}
progress.put(p, X500Principal.class);
}
X500PrivateCredential[] privateCredentials =
(X500PrivateCredential[]) AccessController.doPrivileged(
new SubjectCredentials.GetAllPrivateCredentialsAction(
serverSubject));
List certPaths =
SubjectCredentials.getCertificateChains(serverSubject);
if (certPaths != null) {
for (int i = certPaths.size(); --i >= 0; ) {
CertPath chain = (CertPath) certPaths.get(i);
X509Certificate firstCert = firstX509Cert(chain);
X500Principal p = firstCert.getSubjectX500Principal();
if (progress.containsKey(p)) {
try {
checkValidity(chain, null);
} catch (CertificateException e) {
progress.put(p, e);
continue;
}
progress.put(p, CertPath.class);
for (int j = privateCredentials.length; --j >= 0; ) {
X509Certificate cert =
privateCredentials[j].getCertificate();
if (firstCert.equals(cert)) {
progress.remove(p);
break;
}
}
}
}
}
if (!progress.isEmpty()) {
X500Principal p =
(X500Principal) progress.keySet().iterator().next();
Object result = progress.get(p);
if (result == X500Principal.class) {
throw new UnsupportedConstraintException(
"Missing public credentials: " + p);
} else if (result == CertPath.class) {
throw new UnsupportedConstraintException(
"Missing private credentials: " + p);
} else {
throw new UnsupportedConstraintException(
"Problem with certificates: " + p + "\n" + result,
(CertificateException) result);
}
}
}
/**
* Creates a listen handle for the specified dispatcher and server
* socket.
*/
ListenHandle createListenHandle(RequestDispatcher requestDispatcher,
ServerSocket serverSocket)
throws IOException
{
return new SslListenHandle(requestDispatcher, serverSocket);
}
/** Returns a hash code value for this object. */
public int hashCode() {
return getClass().hashCode()
^ System.identityHashCode(serverSubject)
^ (serverPrincipals == null ? 0 : serverPrincipals.hashCode())
^ port
^ (serverSocketFactory != null
? serverSocketFactory.hashCode() : 0);
}
/**
* Two instances of this class are equal if they have the same actual
* class; have server subjects that compare equal using
* <code>==</code>; have server principals that are either both
* <code>null</code> or compare equal using <code>equals</code>; have
* the same port; and have server socket factories that are both null,
* or have the same actual class and are equal. Note that the server
* host and socket factory are ignored.
*/
public boolean equals(Object object) {
if (this == object) {
return true;
} else if (object == null || getClass() != object.getClass()) {
return false;
}
SslServerEndpointImpl other =
((SslListenEndpoint) object).getImpl();
return serverSubject == other.serverSubject
&& safeEquals(serverPrincipals, other.serverPrincipals)
&& port == other.port
&& Util.sameClassAndEquals(serverSocketFactory,
other.serverSocketFactory);
}
/**
* Returns the SslServerEndpointImpl associated with this listen
* endpoint.
*/
private SslServerEndpointImpl getImpl() {
return SslServerEndpointImpl.this;
}
}
/** Implements ListenHandle */
class SslListenHandle extends Utilities implements ListenHandle {
/** The request handler */
private final RequestDispatcher requestDispatcher;
/** The server socket used to accept connections */
final ServerSocket serverSocket;
/** The security context at the time of the listen. */
private final SecurityContext securityContext;
/** Whether the listen handle has been closed. */
private boolean closed = false;
/** Set of connections created by this listen handle */
private final Set connections = new HashSet();
/** Used to throttle accept failures */
private long acceptFailureTime = 0;
private int acceptFailureCount;
/** Creates a listen handle */
SslListenHandle(RequestDispatcher requestDispatcher,
ServerSocket serverSocket)
throws IOException
{
this.requestDispatcher = requestDispatcher;
this.serverSocket = serverSocket;
securityContext = Security.getContext();
systemExecutor.execute(
new Runnable() {
public void run() {
acceptLoop();
}
},
toString());
logger.log(Level.FINE, "created {0}", this);
}
/** Handles new socket connections. */
final void acceptLoop() {
while (true) {
Socket socket = null;
Throwable exception;
SslServerConnection connection = null;
try {
socket = serverSocket.accept();
/* Send data without delay */
try {
socket.setTcpNoDelay(true);
} catch (SocketException e) {
}
/*
* Send periodic pings so we can tell if the connection
* dies.
*/
try {
socket.setKeepAlive(true);
} catch (SocketException e) {
}
connection = serverConnection(socket);
synchronized (this) {
if (closed) {
try {
connection.closeInternal(
false /* removeFromListener */);
} catch (IOException e) {
}
break;
}
connections.add(connection);
}
final SslServerConnection finalConnection = connection;
AccessController.doPrivileged(
securityContext.wrap(
new PrivilegedAction() {
public Object run() {
handleConnection(
finalConnection, requestDispatcher);
return null;
}
}),
securityContext.getAccessControlContext());
continue;
} catch (Exception e) {
exception = e;
} catch (Error e) {
exception = e;
}
/* Problem occurred */
boolean closedSync;
synchronized (this) {
closedSync = closed;
}
if (!closedSync && logger.isLoggable(Level.INFO)) {
String msg = "handling connection {0} throws";
Object arg = connection;
if (connection == null) {
msg = "accepting connection on {0} throws";
arg = this;
}
logThrow(logger, Level.INFO,
SslListenHandle.class, "acceptLoop",
msg, new Object[] { arg }, exception);
}
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
}
}
if (closedSync) {
break;
}
boolean knownFailure =
(exception instanceof Exception ||
exception instanceof OutOfMemoryError ||
exception instanceof NoClassDefFoundError);
if (!(knownFailure && continueAfterAcceptFailure(exception))) {
try {
serverSocket.close();
} catch (IOException e) {
}
if (!knownFailure) {
throw (Error) exception;
} else {
return;
}
}
}
}
/**
* Throttles the accept loop after ServerSocket.accept throws
* an exception, and decides whether to continue at all. The
* current code is borrowed from the JRMP implementation; it
* always continues, but it delays the loop after bursts of
* failed accepts.
*/
private boolean continueAfterAcceptFailure(Throwable t) {
/*
* If we get a burst of NFAIL failures in NMSEC milliseconds,
* then wait for ten seconds. This is to ensure that individual
* failures don't cause hiccups, but sustained failures don't
* hog the CPU in futile accept-fail-retry looping.
*/
final int NFAIL = 10;
final int NMSEC = 5000;
long now = System.currentTimeMillis();
if (acceptFailureTime == 0L ||
(now - acceptFailureTime) > NMSEC)
{
// failure time is very old, or this is first failure
acceptFailureTime = now;
acceptFailureCount = 0;
} else {
// failure window was started recently
acceptFailureCount++;
if (acceptFailureCount >= NFAIL) {
try {
Thread.sleep(10000);
} catch (InterruptedException ignore) {
}
// no need to reset counter/timer
}
}
return true;
}
/** Returns a string representation of this object. */
public String toString() {
return getClassName(this) + "[" +
serverHost + ":" + getPort() + "]";
}
/** Returns a connection for the specified socket. */
SslServerConnection serverConnection(Socket socket)
throws IOException
{
return new SslServerConnection(this, socket);
}
/** Handles a newly accepted server connection. */
void handleConnection(SslServerConnection connection,
RequestDispatcher requestDispatcher)
{
serverConnectionManager.handleConnection(
connection, requestDispatcher);
}
/** Returns the port on which this handle is listening. */
private int getPort() {
return serverSocket.getLocalPort();
}
/* inherit javadoc */
public synchronized void close() {
if (!closed) {
logger.log(Level.FINE, "closing {0}", this);
closed = true;
try {
serverSocket.close();
} catch (IOException e) {
}
for (Iterator i = connections.iterator(); i.hasNext(); ) {
SslServerConnection connection =
(SslServerConnection) i.next();
try {
/*
* Call closeInternal because close would call back to
* remove the connection and invalidate the iterator.
*/
connection.closeInternal(
false /* removeFromListener */);
} catch (IOException e) {
}
i.remove();
}
}
}
/**
* Called when a connection is closed without a call to close on this
* listener.
*/
synchronized void noteConnectionClosed(
SslServerConnection connection)
{
connections.remove(connection);
}
/* inherit javadoc */
public ListenCookie getCookie() {
return new SslListenCookie(getPort());
}
}
/** Implements ListenCookie */
final class SslListenCookie implements ListenCookie {
private final int port;
SslListenCookie(int port) {
this.port = port;
}
/** Returns the port on which the associated handle is listening. */
final int getPort() {
return port;
}
/**
* Returns the listen endpoint associated with this listen cookie.
*/
final ListenEndpoint getListenEndpoint() {
return listenEndpoint;
}
}
/** Implements ServerConnection */
class SslServerConnection extends Utilities implements ServerConnection {
/** The listen handle that accepted this connection */
private final SslListenHandle listenHandle;
/** The JSSE socket used for communication */
final SSLSocket sslSocket;
/** The inbound request handle for this connection. */
private final InboundRequestHandle requestHandle =
new InboundRequestHandle() { };
/**
* The session for this connection's socket, or null if not retrieved
* yet. Check that the current session matches to prevent new
* handshakes.
*/
private SSLSession session;
/**
* The client subject -- depends on session being set. This instance
* is read-only.
*/
private Subject clientSubject;
/** The client principal -- depends on session being set. */
private X500Principal clientPrincipal;
/** The server principal -- depends on session being set. */
private X500Principal serverPrincipal;
/**
* The authentication permission required for this connection, or null
* if the server is anonymous -- depends on session being set.
*/
private AuthenticationPermission authPermission;
/** The cipher suite -- depends on session being set. */
private String cipherSuite;
/** True if the connection has been closed. */
boolean closed;
/** Creates a server connection */
SslServerConnection(SslListenHandle listenHandle, Socket socket)
throws IOException
{
this.listenHandle = listenHandle;
sslSocket = (SSLSocket) getSSLSocketFactory().createSocket(
socket, socket.getInetAddress().getHostName(),
socket.getPort(), true /* autoClose */);
sslSocket.setEnabledCipherSuites(getSupportedCipherSuites());
/* Need to put in server mode before requesting client auth. */
sslSocket.setUseClientMode(false);
sslSocket.setWantClientAuth(true);
logger.log(Level.FINE, "created {0}", this);
}
/* inherit javadoc */
public String toString() {
String sessionString;
synchronized (this) {
sessionString = session == null ? "" : session + ", ";
}
return getClassName(this) + "[" +
sessionString +
serverHost + ":" + sslSocket.getLocalPort() + "<=" +
sslSocket.getInetAddress().getHostName() + ":" +
sslSocket.getPort() +
"]";
}
/* -- Implement ServerConnection -- */
/* inherit javadoc */
public InputStream getInputStream() throws IOException {
return sslSocket.getInputStream();
}
/* inherit javadoc */
public OutputStream getOutputStream() throws IOException {
return sslSocket.getOutputStream();
}
/* inherit javadoc */
public SocketChannel getChannel() {
return null;
}
/* inherit javadoc */
public InboundRequestHandle processRequestData(InputStream in,
OutputStream out)
{
if (in == null || out == null) {
throw new NullPointerException("Arguments cannot be null");
}
SecurityException exception;
try {
long now = System.currentTimeMillis();
decacheSession();
long create = session.getCreationTime();
long expiration = create + maxServerSessionDuration;
/* Check for rollover */
if (expiration < create) {
expiration = Long.MAX_VALUE;
}
if (expiration < now) {
/*
* The session has expired. Invalidate the session so that
* it is not reused, and throw an exception.
*/
session.invalidate();
throw new SecurityException("Session has expired");
}
if (serverPrincipal != null) {
getAuthManager().checkCredentials(session, clientSubject);
}
return requestHandle;
} catch (SecurityException e) {
exception = e;
} catch (GeneralSecurityException e) {
exception = new SecurityException(e.getMessage());
exception.initCause(e);
}
try {
out.close();
} catch (IOException e2) {
}
if (logger.isLoggable(Levels.FAILED)) {
logThrow(logger, Levels.FAILED,
SslServerConnection.class, "processRequestData",
"process request data for session {0}\nclient {1}\n" +
"throws",
new Object[] { session, subjectString(clientSubject) },
exception);
}
throw exception;
}
/**
* Make sure the cached session is up to date, and set session-related
* fields if needed.
*/
private void decacheSession() {
synchronized (this) {
SSLSession socketSession = sslSocket.getSession();
if (session == socketSession) {
return;
} else if (session != null) {
/*
* We disable session creation as soon as we notice the
* first session, but it is possible that a second
* handshake could have started by then, so check that we
* have the same session. -tjb[31.Jan.2003]
*/
throw new SecurityException(
"New handshake occurred on socket");
}
session = socketSession;
sslSocket.setEnableSessionCreation(false);
cipherSuite = session.getCipherSuite();
if ("NULL".equals(getKeyExchangeAlgorithm(cipherSuite))) {
throw new SecurityException("Handshake failed");
}
clientSubject = getClientSubject(sslSocket);
clientPrincipal = clientSubject != null
? ((X500Principal)
clientSubject.getPrincipals().iterator().next())
: null;
X509Certificate serverCert =
getAuthManager().getServerCertificate(session);
serverPrincipal = serverCert != null
? serverCert.getSubjectX500Principal() : null;
if (serverPrincipal != null) {
authPermission = new AuthenticationPermission(
Collections.singleton(serverPrincipal),
(clientPrincipal != null
? Collections.singleton(clientPrincipal) : null),
"accept");
}
}
}
/**
* Returns the read-only <code>Subject</code> associated with the
* client host connected to the other end of the connection on the
* specified <code>SSLSocket</code>. Returns null if the client is
* anonymous.
*/
private Subject getClientSubject(SSLSocket socket) {
SSLSession session = socket.getSession();
try {
Certificate[] certificateChain = session.getPeerCertificates();
if (certificateChain != null
&& certificateChain.length > 0
&& certificateChain[0] instanceof X509Certificate)
{
X509Certificate cert =
(X509Certificate) certificateChain[0];
return new Subject(
true,
Collections.singleton(cert.getSubjectX500Principal()),
Collections.singleton(
getCertFactory().generateCertPath(
Arrays.asList(certificateChain))),
Collections.EMPTY_SET);
}
} catch (SSLPeerUnverifiedException e) {
} catch (CertificateException e) {
logger.log(Levels.HANDLED,
"get client subject caught exception", e);
}
return null;
}
/* inherit javadoc */
public void checkPermissions(InboundRequestHandle requestHandle) {
check(requestHandle);
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
try {
sm.checkAccept(sslSocket.getInetAddress().getHostAddress(),
sslSocket.getPort());
if (authPermission != null) {
sm.checkPermission(authPermission);
}
} catch (SecurityException e) {
if (logger.isLoggable(Levels.FAILED)) {
logThrow(logger, Levels.FAILED,
SslServerConnection.class, "checkPermissions",
"check permissions for {0} throws",
new Object[] { this },
e);
}
throw e;
}
}
}
/**
* Checks that the argument is the request handle for this connection.
*/
private void check(InboundRequestHandle requestHandle) {
if (requestHandle == null) {
throw new NullPointerException("Request handle cannot be null");
} else if (requestHandle != this.requestHandle) {
throw new IllegalArgumentException(
"Wrong request handle: found " + requestHandle +
", expected " + this.requestHandle);
}
}
/* inherit javadoc */
public InvocationConstraints checkConstraints(
InboundRequestHandle requestHandle,
InvocationConstraints constraints)
throws UnsupportedConstraintException
{
check(requestHandle);
if (constraints == null) {
throw new NullPointerException("Constraints cannot be null");
}
InvocationConstraints result = getUnfulfilledConstraints(
cipherSuite, clientPrincipal, serverPrincipal, constraints);
if (result == null) {
UnsupportedConstraintException uce =
new UnsupportedConstraintException(
"Constraints are not supported: " + constraints);
if (logger.isLoggable(Levels.FAILED)) {
logThrow(logger, Levels.FAILED,
SslServerConnection.class, "checkConstraints",
"check constraints for {0}\nwith {1}\n" +
"throws",
new Object[] {
SslServerConnection.this, constraints
},
uce);
}
throw uce;
}
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"check constraints for {0}\nwith {1}\nreturns {2}",
new Object[] {
SslServerConnection.this, constraints,
result
});
}
return result;
}
/* inherit javadoc */
public void populateContext(InboundRequestHandle requestHandle,
Collection context)
{
check(requestHandle);
Util.populateContext(context, sslSocket.getInetAddress());
Util.populateContext(context, clientSubject);
}
/* inherit javadoc */
public void close() throws IOException {
closeInternal(true);
}
/**
* Like close, but does not call noteConnectionClosed unless
* removeFromListener is true.
*/
void closeInternal(boolean removeFromListener)
throws IOException
{
synchronized (this) {
if (closed) {
return;
}
logger.log(Level.FINE, "closing {0}", this);
closed = true;
sslSocket.close();
}
if (removeFromListener) {
listenHandle.noteConnectionClosed(this);
}
}
}
}