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/*
*
* 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.amqplain;
import java.io.IOException;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.sasl.AuthorizeCallback;
import javax.security.sasl.SaslException;
import javax.security.sasl.SaslServer;
import org.apache.mina.common.ByteBuffer;
import org.apache.qpid.framing.AMQFrameDecodingException;
import org.apache.qpid.framing.FieldTable;
import org.apache.qpid.framing.FieldTableFactory;
public class AmqPlainSaslServer implements SaslServer
{
public static final String MECHANISM = "AMQPLAIN";
private CallbackHandler _cbh;
private String _authorizationId;
private boolean _complete = false;
public AmqPlainSaslServer(CallbackHandler cbh)
{
_cbh = cbh;
}
public String getMechanismName()
{
return MECHANISM;
}
public byte[] evaluateResponse(byte[] response) throws SaslException
{
try
{
final FieldTable ft = FieldTableFactory.newFieldTable(ByteBuffer.wrap(response), response.length);
String username = (String) ft.getString("LOGIN");
// we do not care about the prompt but it throws if null
NameCallback nameCb = new NameCallback("prompt", username);
// we do not care about the prompt but it throws if null
PasswordCallback passwordCb = new PasswordCallback("prompt", false);
// TODO: should not get pwd as a String but as a char array...
String pwd = (String) ft.getString("PASSWORD");
AuthorizeCallback authzCb = new AuthorizeCallback(username, username);
Callback[] callbacks = new Callback[]{nameCb, passwordCb, authzCb};
_cbh.handle(callbacks);
String storedPwd = new String(passwordCb.getPassword());
if (storedPwd.equals(pwd))
{
_complete = true;
}
if (authzCb.isAuthorized() && _complete)
{
_authorizationId = authzCb.getAuthenticationID();
return null;
}
else
{
throw new SaslException("Authentication failed");
}
}
catch (AMQFrameDecodingException e)
{
throw new SaslException("Unable to decode response: " + e, e);
}
catch (IOException e)
{
throw new SaslException("Error processing data: " + e, e);
}
catch (UnsupportedCallbackException e)
{
throw new SaslException("Unable to obtain data from callback handler: " + e, e);
}
}
public boolean isComplete()
{
return _complete;
}
public String getAuthorizationID()
{
return _authorizationId;
}
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
{
_cbh = null;
}
}
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