/*
* 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 org.apache.qpid.server.security.auth.sasl.external;
import java.security.Principal;
import javax.security.auth.x500.X500Principal;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import org.apache.log4j.Logger;
import org.apache.qpid.server.security.auth.UsernamePrincipal;
import org.apache.qpid.transport.network.security.ssl.SSLUtil;
public class ExternalSaslServer implements SaslServer
{
private static final Logger LOGGER = Logger.getLogger(ExternalSaslServer.class);
public static final String MECHANISM = "EXTERNAL";
private boolean _complete = false;
private final Principal _externalPrincipal;
private final boolean _useFullDN;
public ExternalSaslServer(Principal externalPrincipal, boolean useFullDN)
{
_useFullDN = useFullDN;
_externalPrincipal = externalPrincipal;
}
public String getMechanismName()
{
return MECHANISM;
}
public byte[] evaluateResponse(byte[] response) throws SaslException
{
_complete = true;
return null;
}
public boolean isComplete()
{
return _complete;
}
public String getAuthorizationID()
{
return getAuthenticatedPrincipal() == null ? null : getAuthenticatedPrincipal().getName();
}
public byte[] unwrap(byte[] incoming, int offset, int len) throws SaslException
{
throw new SaslException("Unsupported operation");
}
public byte[] wrap(byte[] outgoing, int offset, int len) throws SaslException
{
throw new SaslException("Unsupported operation");
}
public Object getNegotiatedProperty(String propName)
{
return null;
}
public void dispose() throws SaslException
{
}
public Principal getAuthenticatedPrincipal()
{
if (_externalPrincipal instanceof X500Principal && !_useFullDN)
{
// Construct username as <CN>@<DC1>.<DC2>.<DC3>....<DCN>
String username;
String dn = ((X500Principal) _externalPrincipal).getName(X500Principal.RFC2253);
if(LOGGER.isDebugEnabled())
{
LOGGER.debug("Parsing username from Principal DN: " + dn);
}
username = SSLUtil.getIdFromSubjectDN(dn);
if (username.isEmpty())
{
// CN is empty => Cannot construct username => Authentication failed => return null
if(LOGGER.isDebugEnabled())
{
LOGGER.debug("CN value was empty in Principal name, unable to construct username");
}
return null;
}
if(LOGGER.isDebugEnabled())
{
LOGGER.debug("Constructing Principal with username: " + username);
}
return new UsernamePrincipal(username);
}
else
{
if(LOGGER.isDebugEnabled())
{
LOGGER.debug("Using external Principal: " + _externalPrincipal);
}
return _externalPrincipal;
}
}
}