mirror of
https://github.com/vanitasvitae/Smack.git
synced 2024-06-14 23:54:49 +02:00
26f4528698
Using the term 'enabled' was a terriable choice from a security perspective, as it gives the user the impression that the security is "enabled". In fact this setting is only slightly better then "disabled". Make that fact clear in the javadoc too.
635 lines
22 KiB
Java
635 lines
22 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack;
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import org.jivesoftware.smack.packet.Session;
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import org.jivesoftware.smack.proxy.ProxyInfo;
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import javax.net.SocketFactory;
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import javax.net.ssl.HostnameVerifier;
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import javax.net.ssl.SSLContext;
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import javax.security.auth.callback.CallbackHandler;
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/**
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* Configuration to use while establishing the connection to the server.
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*
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* @author Gaston Dombiak
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*/
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public abstract class ConnectionConfiguration {
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static {
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// Ensure that Smack is initialized when ConnectionConfiguration is used, or otherwise e.g.
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// SmackConfiguration.DEBUG may not be initialized yet.
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SmackConfiguration.getVersion();
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}
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/**
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* Hostname of the XMPP server. Usually servers use the same service name as the name
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* of the server. However, there are some servers like google where host would be
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* talk.google.com and the serviceName would be gmail.com.
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*/
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protected final String serviceName;
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protected final String host;
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protected final int port;
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private final String keystorePath;
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private final String keystoreType;
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private final String pkcs11Library;
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private final SSLContext customSSLContext;
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/**
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* Used to get information from the user
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*/
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private final CallbackHandler callbackHandler;
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private final boolean debuggerEnabled;
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// Holds the socket factory that is used to generate the socket in the connection
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private final SocketFactory socketFactory;
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private final CharSequence username;
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private final String password;
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private final String resource;
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/**
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* Initial presence as of RFC 6121 § 4.2
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* @see <a href="http://xmpp.org/rfcs/rfc6121.html#presence-initial">RFC 6121 § 4.2 Initial Presence</a>
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*/
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private final boolean sendPresence;
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private final boolean legacySessionDisabled;
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private final SecurityMode securityMode;
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/**
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*
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*/
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private final String[] enabledSSLProtocols;
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/**
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*
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*/
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private final String[] enabledSSLCiphers;
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private final HostnameVerifier hostnameVerifier;
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// Holds the proxy information (such as proxyhost, proxyport, username, password etc)
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protected final ProxyInfo proxy;
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protected final boolean allowNullOrEmptyUsername;
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protected ConnectionConfiguration(Builder<?,?> builder) {
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username = builder.username;
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password = builder.password;
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callbackHandler = builder.callbackHandler;
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// Resource can be null, this means that the server must provide one
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resource = builder.resource;
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serviceName = builder.serviceName;
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if (serviceName == null) {
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throw new IllegalArgumentException("Must provide XMPP service name");
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}
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host = builder.host;
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port = builder.port;
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proxy = builder.proxy;
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if (proxy != null) {
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if (builder.socketFactory != null) {
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throw new IllegalArgumentException("Can not use proxy together with custom socket factory");
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}
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socketFactory = proxy.getSocketFactory();
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} else {
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socketFactory = builder.socketFactory;
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}
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securityMode = builder.securityMode;
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keystoreType = builder.keystoreType;
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keystorePath = builder.keystorePath;
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pkcs11Library = builder.pkcs11Library;
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customSSLContext = builder.customSSLContext;
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enabledSSLProtocols = builder.enabledSSLProtocols;
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enabledSSLCiphers = builder.enabledSSLCiphers;
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hostnameVerifier = builder.hostnameVerifier;
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sendPresence = builder.sendPresence;
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legacySessionDisabled = builder.legacySessionDisabled;
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debuggerEnabled = builder.debuggerEnabled;
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allowNullOrEmptyUsername = builder.allowEmptyOrNullUsername;
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}
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/**
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* Returns the server name of the target server.
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*
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* @return the server name of the target server.
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*/
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public String getServiceName() {
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return serviceName;
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}
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/**
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* Returns the TLS security mode used when making the connection. By default,
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* the mode is {@link SecurityMode#ifpossible}.
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*
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* @return the security mode.
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*/
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public SecurityMode getSecurityMode() {
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return securityMode;
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}
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/**
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* Retuns the path to the keystore file. The key store file contains the
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* certificates that may be used to authenticate the client to the server,
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* in the event the server requests or requires it.
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*
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* @return the path to the keystore file.
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*/
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public String getKeystorePath() {
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return keystorePath;
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}
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/**
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* Returns the keystore type, or <tt>null</tt> if it's not set.
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*
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* @return the keystore type.
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*/
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public String getKeystoreType() {
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return keystoreType;
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}
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/**
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* Returns the PKCS11 library file location, needed when the
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* Keystore type is PKCS11.
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*
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* @return the path to the PKCS11 library file
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*/
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public String getPKCS11Library() {
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return pkcs11Library;
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}
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/**
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* Gets the custom SSLContext previously set with {@link ConnectionConfiguration.Builder#setCustomSSLContext(SSLContext)} for
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* SSL sockets. This is null by default.
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*
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* @return the custom SSLContext or null.
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*/
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public SSLContext getCustomSSLContext() {
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return this.customSSLContext;
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}
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/**
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* Return the enabled SSL/TLS protocols.
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*
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* @return the enabled SSL/TLS protocols
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*/
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public String[] getEnabledSSLProtocols() {
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return enabledSSLProtocols;
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}
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/**
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* Return the enabled SSL/TLS ciphers.
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*
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* @return the enabled SSL/TLS ciphers
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*/
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public String[] getEnabledSSLCiphers() {
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return enabledSSLCiphers;
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}
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/**
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* Returns the configured HostnameVerifier of this ConnectionConfiguration or the Smack default
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* HostnameVerifier configured with
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* {@link SmackConfiguration#setDefaultHostnameVerifier(HostnameVerifier)}.
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*
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* @return a configured HostnameVerifier or <code>null</code>
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*/
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public HostnameVerifier getHostnameVerifier() {
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if (hostnameVerifier != null)
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return hostnameVerifier;
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return SmackConfiguration.getDefaultHostnameVerifier();
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}
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/**
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* Returns true if the new connection about to be establish is going to be debugged. By
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* default the value of {@link SmackConfiguration#DEBUG} is used.
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*
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* @return true if the new connection about to be establish is going to be debugged.
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*/
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public boolean isDebuggerEnabled() {
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return debuggerEnabled;
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}
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/**
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* Returns true if a {@link Session} will be requested on login if the server
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* supports it. Although this was mandatory on RFC 3921, RFC 6120/6121 don't
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* even mention this part of the protocol.
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*
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* @return true if a session has to be requested when logging in.
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* @deprecated Smack processes the 'optional' element of the session stream feature.
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* @see Builder#setLegacySessionDisabled(boolean)
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*/
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@Deprecated
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public boolean isLegacySessionDisabled() {
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return legacySessionDisabled;
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}
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/**
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* Returns a CallbackHandler to obtain information, such as the password or
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* principal information during the SASL authentication. A CallbackHandler
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* will be used <b>ONLY</b> if no password was specified during the login while
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* using SASL authentication.
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*
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* @return a CallbackHandler to obtain information, such as the password or
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* principal information during the SASL authentication.
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*/
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public CallbackHandler getCallbackHandler() {
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return callbackHandler;
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}
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/**
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* Returns the socket factory used to create new xmppConnection sockets.
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* This is useful when connecting through SOCKS5 proxies.
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*
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* @return socketFactory used to create new sockets.
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*/
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public SocketFactory getSocketFactory() {
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return this.socketFactory;
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}
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/**
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* An enumeration for TLS security modes that are available when making a connection
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* to the XMPP server.
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*/
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public static enum SecurityMode {
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/**
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* Securirty via TLS encryption is required in order to connect. If the server
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* does not offer TLS or if the TLS negotiaton fails, the connection to the server
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* will fail.
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*/
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required,
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/**
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* Security via TLS encryption is used whenever it's available. This is the
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* default setting.
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* <p>
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* <b>Do not use this setting</b> unless you can't use {@link #required}. An attacker could easily perform a
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* Man-in-the-middle attack and prevent TLS from being used, leaving you with an unencrypted (and
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* unauthenticated) connection.
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* </p>
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*/
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ifpossible,
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/**
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* Security via TLS encryption is disabled and only un-encrypted connections will
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* be used. If only TLS encryption is available from the server, the connection
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* will fail.
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*/
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disabled
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}
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/**
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* Returns the username to use when trying to reconnect to the server.
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*
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* @return the username to use when trying to reconnect to the server.
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*/
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public CharSequence getUsername() {
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return this.username;
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}
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/**
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* Returns the password to use when trying to reconnect to the server.
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*
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* @return the password to use when trying to reconnect to the server.
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*/
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public String getPassword() {
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return this.password;
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}
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/**
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* Returns the resource to use when trying to reconnect to the server.
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*
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* @return the resource to use when trying to reconnect to the server.
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*/
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public String getResource() {
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return resource;
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}
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/**
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* Returns true if an available presence should be sent when logging in while reconnecting.
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*
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* @return true if an available presence should be sent when logging in while reconnecting
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*/
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public boolean isSendPresence() {
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return sendPresence;
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}
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/**
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* Returns true if the connection is going to use stream compression. Stream compression
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* will be requested after TLS was established (if TLS was enabled) and only if the server
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* offered stream compression. With stream compression network traffic can be reduced
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* up to 90%. By default compression is disabled.
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*
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* @return true if the connection is going to use stream compression.
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*/
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public boolean isCompressionEnabled() {
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// Compression for non-TCP connections is always disabled
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return false;
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}
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/**
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* A builder for XMPP connection configurations.
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* <p>
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* This is an abstract class that uses the builder design pattern and the "getThis() trick" to recover the type of
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* the builder in a class hierarchies with a self-referential generic supertype. Otherwise chaining of build
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* instructions from the superclasses followed by build instructions of a sublcass would not be possible, because
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* the superclass build instructions would return the builder of the superclass and not the one of the subclass. You
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* can read more about it a Angelika Langer's Generics FAQ, especially the entry <a
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* href="http://www.angelikalanger.com/GenericsFAQ/FAQSections/ProgrammingIdioms.html#FAQ206">What is the
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* "getThis()" trick?</a>.
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* </p>
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*
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* @param <B> the builder type parameter.
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* @param <C> the resulting connection configuration type parameter.
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*/
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public static abstract class Builder<B extends Builder<B, C>, C extends ConnectionConfiguration> {
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private SecurityMode securityMode = SecurityMode.ifpossible;
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private String keystorePath = System.getProperty("javax.net.ssl.keyStore");
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private String keystoreType = "jks";
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private String pkcs11Library = "pkcs11.config";
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private SSLContext customSSLContext;
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private String[] enabledSSLProtocols;
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private String[] enabledSSLCiphers;
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private HostnameVerifier hostnameVerifier;
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private CharSequence username;
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private String password;
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private String resource = "Smack";
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private boolean sendPresence = true;
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private boolean legacySessionDisabled = false;
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private ProxyInfo proxy;
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private CallbackHandler callbackHandler;
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private boolean debuggerEnabled = SmackConfiguration.DEBUG;
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private SocketFactory socketFactory;
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private String serviceName;
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private String host;
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private int port = 5222;
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private boolean allowEmptyOrNullUsername = false;
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protected Builder() {
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}
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/**
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* Set the XMPP entities username and password.
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* <p>
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* The username is usually the localpart of the clients JID. But some SASL mechanisms or services may require a different
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* format (e.g. the full JID) as used authorization identity.
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* </p>
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*
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* @param username the username or authorization identity
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* @param password the password or token used to authenticate
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* @return a reference to this builder.
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*/
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public B setUsernameAndPassword(CharSequence username, String password) {
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this.username = username;
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this.password = password;
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return getThis();
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}
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/**
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* Set the service name of this XMPP service (i.e., the XMPP domain).
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*
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* @param serviceName the service name
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* @return a reference to this builder.
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*/
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public B setServiceName(String serviceName) {
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this.serviceName = serviceName;
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return getThis();
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}
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/**
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* Set the resource to use.
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* <p>
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* If <code>resource</code> is <code>null</code>, then the server will automatically create a resource for the
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* client. Default resource is "Smack".
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* </p>
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*
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* @param resource the resource to use.
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* @return a reference to this builder.
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*/
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public B setResource(String resource) {
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this.resource = resource;
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return getThis();
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}
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public B setHost(String host) {
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this.host = host;
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return getThis();
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}
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public B setPort(int port) {
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this.port = port;
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return getThis();
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}
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/**
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* Sets a CallbackHandler to obtain information, such as the password or
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* principal information during the SASL authentication. A CallbackHandler
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* will be used <b>ONLY</b> if no password was specified during the login while
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* using SASL authentication.
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*
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* @param callbackHandler to obtain information, such as the password or
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* principal information during the SASL authentication.
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* @return a reference to this builder.
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*/
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public B setCallbackHandler(CallbackHandler callbackHandler) {
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this.callbackHandler = callbackHandler;
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return getThis();
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}
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/**
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* Sets the TLS security mode used when making the connection. By default,
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* the mode is {@link SecurityMode#ifpossible}.
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*
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* @param securityMode the security mode.
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* @return a reference to this builder.
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*/
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public B setSecurityMode(SecurityMode securityMode) {
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this.securityMode = securityMode;
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return getThis();
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}
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/**
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* Sets the path to the keystore file. The key store file contains the
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* certificates that may be used to authenticate the client to the server,
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* in the event the server requests or requires it.
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*
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* @param keystorePath the path to the keystore file.
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* @return a reference to this builder.
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*/
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public B setKeystorePath(String keystorePath) {
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this.keystorePath = keystorePath;
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return getThis();
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}
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/**
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* Sets the keystore type.
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*
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* @param keystoreType the keystore type.
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* @return a reference to this builder.
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*/
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public B setKeystoreType(String keystoreType) {
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this.keystoreType = keystoreType;
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return getThis();
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}
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/**
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* Sets the PKCS11 library file location, needed when the
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* Keystore type is PKCS11
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*
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* @param pkcs11Library the path to the PKCS11 library file.
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* @return a reference to this builder.
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*/
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public B setPKCS11Library(String pkcs11Library) {
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this.pkcs11Library = pkcs11Library;
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return getThis();
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}
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/**
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* Sets a custom SSLContext for creating SSL sockets.
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* <p>
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* For more information on how to create a SSLContext see <a href=
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* "http://docs.oracle.com/javase/8/docs/technotes/guides/security/jsse/JSSERefGuide.html#X509TrustManager"
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* >Java Secure Socket Extension (JSEE) Reference Guide: Creating Your Own X509TrustManager</a>
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*
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* @param context the custom SSLContext for new sockets.
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* @return a reference to this builder.
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*/
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public B setCustomSSLContext(SSLContext context) {
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this.customSSLContext = context;
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return getThis();
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}
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/**
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* Set the enabled SSL/TLS protocols.
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*
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* @param enabledSSLProtocols
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* @return a reference to this builder.
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*/
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public B setEnabledSSLProtocols(String[] enabledSSLProtocols) {
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this.enabledSSLProtocols = enabledSSLProtocols;
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return getThis();
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}
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/**
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* Set the enabled SSL/TLS ciphers.
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*
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* @param enabledSSLCiphers the enabled SSL/TLS ciphers
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* @return a reference to this builder.
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*/
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public B setEnabledSSLCiphers(String[] enabledSSLCiphers) {
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this.enabledSSLCiphers = enabledSSLCiphers;
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return getThis();
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}
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/**
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* Set the HostnameVerifier used to verify the hostname of SSLSockets used by XMPP connections
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* created with this ConnectionConfiguration.
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*
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* @param verifier
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* @return a reference to this builder.
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*/
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public B setHostnameVerifier(HostnameVerifier verifier) {
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hostnameVerifier = verifier;
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return getThis();
|
|
}
|
|
|
|
/**
|
|
* Sets if a {@link Session} will be requested on login if the server supports
|
|
* it. Although this was mandatory on RFC 3921, RFC 6120/6121 don't even
|
|
* mention this part of the protocol.
|
|
* <p>
|
|
* Deprecation notice: This setting is no longer required in most cases because Smack processes the 'optional'
|
|
* element eventually found in the session stream feature. See also <a
|
|
* href="https://tools.ietf.org/html/draft-cridland-xmpp-session-01">Here Lies Extensible Messaging and Presence
|
|
* Protocol (XMPP) Session Establishment</a>
|
|
* </p>
|
|
*
|
|
* @param legacySessionDisabled if a session has to be requested when logging in.
|
|
* @return a reference to this builder.
|
|
* @deprecated Smack processes the 'optional' element of the session stream feature.
|
|
*/
|
|
@Deprecated
|
|
public B setLegacySessionDisabled(boolean legacySessionDisabled) {
|
|
this.legacySessionDisabled = legacySessionDisabled;
|
|
return getThis();
|
|
}
|
|
|
|
/**
|
|
* Sets if an initial available presence will be sent to the server. By default
|
|
* an available presence will be sent to the server indicating that this presence
|
|
* is not online and available to receive messages. If you want to log in without
|
|
* being 'noticed' then pass a <tt>false</tt> value.
|
|
*
|
|
* @param sendPresence true if an initial available presence will be sent while logging in.
|
|
* @return a reference to this builder.
|
|
*/
|
|
public B setSendPresence(boolean sendPresence) {
|
|
this.sendPresence = sendPresence;
|
|
return getThis();
|
|
}
|
|
|
|
/**
|
|
* Sets if the new connection about to be establish is going to be debugged. By
|
|
* default the value of {@link SmackConfiguration#DEBUG} is used.
|
|
*
|
|
* @param debuggerEnabled if the new connection about to be establish is going to be debugged.
|
|
* @return a reference to this builder.
|
|
*/
|
|
public B setDebuggerEnabled(boolean debuggerEnabled) {
|
|
this.debuggerEnabled = debuggerEnabled;
|
|
return getThis();
|
|
}
|
|
|
|
/**
|
|
* Sets the socket factory used to create new xmppConnection sockets.
|
|
* This is useful when connecting through SOCKS5 proxies.
|
|
*
|
|
* @param socketFactory used to create new sockets.
|
|
* @return a reference to this builder.
|
|
*/
|
|
public B setSocketFactory(SocketFactory socketFactory) {
|
|
this.socketFactory = socketFactory;
|
|
return getThis();
|
|
}
|
|
|
|
/**
|
|
* Allow <code>null</code> or the empty String as username.
|
|
*
|
|
* Some SASL mechanisms (e.g. SASL External) may also signal the username (as "authorization identity"), in
|
|
* which case Smack should not throw an IllegalArgumentException when the username is not set.
|
|
*
|
|
* @return a reference to this builder.
|
|
*/
|
|
public B allowEmptyOrNullUsernames() {
|
|
allowEmptyOrNullUsername = true;
|
|
return getThis();
|
|
}
|
|
|
|
public abstract C build();
|
|
|
|
protected abstract B getThis();
|
|
}
|
|
}
|