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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* 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 net.java.sip.communicator.impl.protocol.jabber;
import net.java.sip.communicator.service.certificate.*;
import net.java.sip.communicator.service.protocol.*;
import org.jitsi.util.*;
import org.jivesoftware.smack.*;
import javax.net.ssl.*;
import java.security.*;
/**
* Login to Jabber using a client certificate (as defined in the account
* configuration)
*
* @author Stefan Sieber
*/
class LoginByClientCertificateStrategy
implements JabberLoginStrategy
{
private final static Logger logger
= Logger.getLogger(LoginByClientCertificateStrategy.class);
private AccountID accountID;
/**
* Creates a new instance of this class.
*
* @param accountID The account to use for the strategy.
*/
public LoginByClientCertificateStrategy(AccountID accountID)
{
this.accountID = accountID;
}
/**
* Does nothing.
*
* @param authority unused
* @param reasonCode unused
* @return always <tt>null</tt>
*/
public UserCredentials prepareLogin(SecurityAuthority authority,
int reasonCode)
{
// password is retrieved later when opening the key store.
return null;
}
/**
* Does nothing.
*
* @return always <tt>true</tt>
*/
public boolean loginPreparationSuccessful()
{
return true;
}
/**
* Always true as the authentication occurs with the TLS client
* certificate.
*
* @return always <tt>true</tt>
*/
public boolean isTlsRequired()
{
return true;
}
/**
* Creates the SSLContext for the XMPP connection configured with a
* customized TrustManager and a KeyManager based on the selected client
* certificate.
*
* @param certificateService certificate service to retrieve the
* SSL context
* @param trustManager Trust manager to use for the context
* @return Configured and initialized SSL Context
* @throws GeneralSecurityException
*/
public SSLContext createSslContext(CertificateService cs,
X509TrustManager trustManager)
throws GeneralSecurityException
{
String certConfigName = accountID.getAccountPropertyString(
ProtocolProviderFactory.CLIENT_TLS_CERTIFICATE);
return cs.getSSLContext(certConfigName, trustManager);
}
/**
* Performs the login on the XMPP connection using the SASL EXTERNAL
* mechanism.
*
* @param connection The connection on which the login is performed.
* @param userName The username for the login.
* @param resource The XMPP resource.
* @return true when the login succeeded, false when the certificate wasn't
* accepted.
* @throws XMPPException
*/
public boolean login(Connection connection, String userName,
String resource)
throws XMPPException
{
SASLAuthentication.supportSASLMechanism("EXTERNAL", 0);
// user/password MUST be empty. In fact they shouldn't be
// necessary at all because the user name is derived from the
// client certificate.
try
{
connection.login("", "", resource);
return true;
}
catch (XMPPException ex)
{
if (ex.getMessage().contains("EXTERNAL failed: not-authorized"))
{
logger.error("Certificate login failed", ex);
return false;
}
throw ex;
}
}
}
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