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Code Issues Releases Wiki Activity

Improve TLS/SSL support

Browse source 
Add TLSUtils. Make it possible to set the enabled SSL/TLS protocols and
ciphers and provide sane error reporting.
This commit is contained in:
Florian Schmaus 2014-05-29 09:21:04 +02:00
parent 8cc2a76e7f
commit 8977f5b3f0
6 changed files with 274 additions and 23 deletions
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16
smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java
View file

@ -209,7 +209,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
/**
*
*/
private IOException connectionException;
private Exception connectionException;
/**
* Flag that indicates if the user is currently authenticated with the server.
@ -435,13 +435,19 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
return userJID;
}
protected void setConnectionException(IOException exception) {
connectionException = exception;
protected void setConnectionException(Exception e) {
connectionException = e;
}
protected void throwConnectionExceptionOrNoResponse() throws IOException, NoResponseException {
protected void throwConnectionExceptionOrNoResponse() throws IOException, NoResponseException, SmackException {
if (connectionException != null) {
throw connectionException;
if (connectionException instanceof IOException) {
throw (IOException) connectionException;
} else if (connectionException instanceof SmackException) {
throw (SmackException) connectionException;
} else {
throw new SmackException(connectionException);
}
} else {
throw new NoResponseException();
}

46
smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
View file

@ -80,6 +80,16 @@ public class ConnectionConfiguration implements Cloneable {
private boolean useDnsSrvRr = true;
private SecurityMode securityMode = SecurityMode.enabled;
/**
*
*/
private String[] enabledSSLProtocols;
/**
*
*/
private String[] enabledSSLCiphers;
/**
* Permanent store for the Roster, needed for roster versioning
*/
@ -310,6 +320,42 @@ public class ConnectionConfiguration implements Cloneable {
this.customSSLContext = context;
}
/**
* Set the enabled SSL/TLS protocols.
*
* @param enabledSSLProtocols
*/
public void setEnabledSSLProtocols(String[] enabledSSLProtocols) {
this.enabledSSLProtocols = enabledSSLProtocols;
}
/**
* Return the enabled SSL/TLS protocols.
*
* @return the enabled SSL/TLS protocols
*/
public String[] getEnabledSSLProtocols() {
return enabledSSLProtocols;
}
/**
* Set the enabled SSL/TLS ciphers.
*
* @param enabledSSLCiphers the enabled SSL/TLS ciphers
*/
public void setEnabledSSLCiphers(String[] enabledSSLCiphers) {
this.enabledSSLCiphers = enabledSSLCiphers;
}
/**
* Return the enabled SSL/TLS ciphers.
*
* @return the enabled SSL/TLS ciphers
*/
public String[] getEnabledSSLCiphers() {
return enabledSSLCiphers;
}
/**
* Returns true if the connection is going to use stream compression. Stream compression
* will be requested after TLS was established (if TLS was enabled) and only if the server

12
smack-core/src/main/java/org/jivesoftware/smack/SmackException.java
View file

@ -122,6 +122,18 @@ public class SmackException extends Exception {
}
}
public static class SecurityNotPossibleException extends SmackException {
/**
*
*/
private static final long serialVersionUID = -6836090872690331336L;
public SecurityNotPossibleException(String message) {
super(message);
}
}
public static class ConnectionException extends SmackException {
/**

13
smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java
View file

@ -20,6 +20,7 @@ package org.jivesoftware.smack.util;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Collection;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
@ -536,4 +537,16 @@ public class StringUtils {
public static boolean isNullOrEmpty(CharSequence cs) {
return cs == null || cs.length() == 0;
}
public static String collectionToString(Collection<String> collection) {
StringBuilder sb = new StringBuilder();
for (String s : collection) {
sb.append(s);
sb.append(" ");
}
String res = sb.toString();
// Remove the trailing whitespace
res = res.substring(0, res.length() - 1);
return res;
}
}

156
smack-core/src/main/java/org/jivesoftware/smack/util/TLSUtils.java Normal file
View file

@ -0,0 +1,156 @@
/**
*
* Copyright 2014 Florian Schmaus
*
* Licensed 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 org.jivesoftware.smack.util;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.SmackException.SecurityNotPossibleException;
public class TLSUtils {
public static final String SSL = "SSL";
public static final String TLS = "TLS";
public static final String PROTO_SSL3 = SSL + "v3";
public static final String PROTO_TLSV1 = TLS + "v1";
public static final String PROTO_TLSV1_1 = TLS + "v1.1";
public static final String PROTO_TLSV1_2 = TLS + "v1.2";
/**
* Enable only TLS. Connections created with the given ConnectionConfiguration will only support TLS.
* <p>
* According to the <a
* href="https://raw.githubusercontent.com/stpeter/manifesto/master/manifesto.txt">Encrypted
* XMPP Manifesto</a>, TLSv1.2 shall be deployed, providing fallback support for SSLv3 and
* TLSv1.1. This method goes one step boyond and upgrades the handshake to use TLSv1 or better.
* This method requires the underlying OS to support all of TLSv1.2 , 1.1 and 1.0.
* </p>
*
* @param conf the configuration to apply this setting to
*/
public static void setTLSOnly(ConnectionConfiguration conf) {
conf.setEnabledSSLProtocols(new String[] { PROTO_TLSV1_2, PROTO_TLSV1_1, PROTO_TLSV1 });
}
/**
* Enable only TLS and SSLv3. Connections created with the given ConnectionConfiguration will
* only support TLS and SSLv3.
* <p>
* According to the <a
* href="https://raw.githubusercontent.com/stpeter/manifesto/master/manifesto.txt">Encrypted
* XMPP Manifesto</a>, TLSv1.2 shall be deployed, providing fallback support for SSLv3 and
* TLSv1.1.
* </p>
*
* @param conf the configuration to apply this setting to
*/
public static void setSSLv3AndTLSOnly(ConnectionConfiguration conf) {
conf.setEnabledSSLProtocols(new String[] { PROTO_TLSV1_2, PROTO_TLSV1_1, PROTO_TLSV1, PROTO_SSL3 });
}
/**
* Accept all SSL/TLS certificates.
* <p>
* <b>Warning</b> Use with care. Only use this method if you understand the implications.
* </p>
*
* @param conf
* @throws NoSuchAlgorithmException
* @throws KeyManagementException
*/
public static void acceptAllCertificates(ConnectionConfiguration conf) throws NoSuchAlgorithmException, KeyManagementException {
SSLContext context = SSLContext.getInstance(TLS);
context.init(null, new TrustManager[] { new AcceptAllTrustManager() }, new SecureRandom());
conf.setCustomSSLContext(context);
}
public static void setEnabledProtocolsAndCiphers(final SSLSocket sslSocket,
String[] enabledProtocols, String[] enabledCiphers)
throws SecurityNotPossibleException {
if (enabledProtocols != null) {
Set<String> enabledProtocolsSet = new HashSet<String>(Arrays.asList(enabledProtocols));
Set<String> supportedProtocolsSet = new HashSet<String>(
Arrays.asList(sslSocket.getSupportedProtocols()));
Set<String> protocolsIntersection = new HashSet<String>(supportedProtocolsSet);
protocolsIntersection.retainAll(enabledProtocolsSet);
if (protocolsIntersection.isEmpty()) {
throw new SecurityNotPossibleException("Request to enable SSL/TLS protocols '"
+ StringUtils.collectionToString(enabledProtocolsSet)
+ "', but only '"
+ StringUtils.collectionToString(supportedProtocolsSet)
+ "' are supported.");
}
// Set the enabled protocols
enabledProtocols = new String[protocolsIntersection.size()];
enabledProtocols = protocolsIntersection.toArray(enabledProtocols);
sslSocket.setEnabledProtocols(enabledProtocols);
}
if (enabledCiphers != null) {
Set<String> enabledCiphersSet = new HashSet<String>(Arrays.asList(enabledCiphers));
Set<String> supportedCiphersSet = new HashSet<String>(
Arrays.asList(sslSocket.getEnabledCipherSuites()));
Set<String> ciphersIntersection = new HashSet<String>(supportedCiphersSet);
ciphersIntersection.retainAll(enabledCiphersSet);
if (ciphersIntersection.isEmpty()) {
throw new SecurityNotPossibleException("Request to enable SSL/TLS ciphers '"
+ StringUtils.collectionToString(enabledCiphersSet)
+ "', but only '"
+ StringUtils.collectionToString(supportedCiphersSet)
+ "' are supported.");
}
enabledCiphers = new String[ciphersIntersection.size()];
enabledCiphers = ciphersIntersection.toArray(enabledCiphers);
sslSocket.setEnabledCipherSuites(enabledCiphers);
}
}
public static class AcceptAllTrustManager implements X509TrustManager {
@Override
public void checkClientTrusted(X509Certificate[] arg0, String arg1)
throws CertificateException {
// Nothing to do here
}
@Override
public void checkServerTrusted(X509Certificate[] arg0, String arg1)
throws CertificateException {
// Nothing to do here
}
@Override
public X509Certificate[] getAcceptedIssuers() {
throw new UnsupportedOperationException();
}
}
}

54
smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java
View file

@ -23,9 +23,9 @@ import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.SmackException.AlreadyLoggedInException;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.SmackException.ConnectionException;
import org.jivesoftware.smack.SmackException.SecurityNotPossibleException;
import org.jivesoftware.smack.SmackException.SecurityRequiredException;
import org.jivesoftware.smack.XMPPException.StreamErrorException;
import org.jivesoftware.smack.XMPPConnection;
@ -41,6 +41,7 @@ import org.jivesoftware.smack.sasl.SASLMechanism.Success;
import org.jivesoftware.smack.util.ArrayBlockingQueueWithShutdown;
import org.jivesoftware.smack.util.PacketParserUtils;
import org.jivesoftware.smack.util.StringUtils;
import org.jivesoftware.smack.util.TLSUtils;
import org.jivesoftware.smack.util.dns.HostAddress;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
@ -68,9 +69,15 @@ import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.lang.reflect.Constructor;
import java.net.Socket;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Provider;
import java.security.Security;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
@ -578,10 +585,18 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
* The server has indicated that TLS negotiation can start. We now need to secure the
* existing plain connection and perform a handshake. This method won't return until the
* connection has finished the handshake or an error occurred while securing the connection.
* @throws IOException
* @throws CertificateException
* @throws NoSuchAlgorithmException
* @throws NoSuchProviderException
* @throws KeyStoreException
* @throws UnrecoverableKeyException
* @throws KeyManagementException
* @throws SecurityNotPossibleException
*
* @throws Exception if an exception occurs.
*/
private void proceedTLSReceived() throws Exception {
private void proceedTLSReceived() throws NoSuchAlgorithmException, CertificateException, IOException, KeyStoreException, NoSuchProviderException, UnrecoverableKeyException, KeyManagementException, SecurityNotPossibleException {
SSLContext context = this.config.getCustomSSLContext();
KeyStore ks = null;
KeyManager[] kms = null;
@ -655,14 +670,12 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
// Initialize the reader and writer with the new secured version
initReaderAndWriter();
try {
// Proceed to do the handshake
((SSLSocket) socket).startHandshake();
}
catch (IOException e) {
setConnectionException(e);
throw e;
}
final SSLSocket sslSocket = (SSLSocket) socket;
TLSUtils.setEnabledProtocolsAndCiphers(sslSocket, config.getEnabledSSLProtocols(), config.getEnabledSSLCiphers());
// Proceed to do the handshake
sslSocket.startHandshake();
//if (((SSLSocket) socket).getWantClientAuth()) {
// System.err.println("XMPPConnection wants client auth");
//}
@ -907,11 +920,10 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
* has been established or if the server's features could not be parsed within
* the connection's PacketReplyTimeout.
*
* @throws NoResponseException if the server fails to send an opening stream back
* within packetReplyTimeout.
* @throws IOException
* @throws SmackException
*/
synchronized void startup() throws NoResponseException, IOException {
synchronized void startup() throws IOException, SmackException {
readerThread.start();
try {
@ -1006,11 +1018,17 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
parseFeatures(parser);
}
else if (name.equals("proceed")) {
// Secure the connection by negotiating TLS
proceedTLSReceived();
// Reset the state of the parser since a new stream element is going
// to be sent by the server
resetParser();
try {
// Secure the connection by negotiating TLS
proceedTLSReceived();
// Reset the state of the parser since a new stream element is going
// to be sent by the server
resetParser();
}
catch (Exception e) {
setConnectionException(e);
throw e;
}
}
else if (name.equals("failure")) {
String namespace = parser.getNamespace(null);