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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* 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.apache.qpid.server.security.auth;
import org.apache.commons.configuration.Configuration;
import javax.security.auth.callback.*;
import javax.security.auth.login.AccountNotFoundException;
import javax.security.sasl.AuthorizeCallback;
import java.util.Map;
import java.io.IOException;
import java.security.Principal;
public abstract class UsernamePasswordInitialiser implements AuthenticationProviderInitialiser
{
private ServerCallbackHandler _callbackHandler;
private class ServerCallbackHandler implements CallbackHandler
{
private final PrincipalDatabase _principalDatabase;
protected ServerCallbackHandler(PrincipalDatabase database)
{
_principalDatabase = database;
}
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException
{
Principal username = null;
for (Callback callback : callbacks)
{
if (callback instanceof NameCallback)
{
username = new UsernamePrincipal(((NameCallback)callback).getDefaultName());
}
else if (callback instanceof PasswordCallback)
{
try
{
_principalDatabase.setPassword(username, (PasswordCallback) callback);
}
catch (AccountNotFoundException e)
{
// very annoyingly the callback handler does not throw anything more appropriate than
// IOException
throw new IOException("Error looking up user " + e);
}
}
else if (callback instanceof AuthorizeCallback)
{
((AuthorizeCallback)callback).setAuthorized(true);
}
else
{
throw new UnsupportedCallbackException(callback);
}
}
}
}
public void initialise(String baseConfigPath, Configuration configuration,
Map<String, PrincipalDatabase> principalDatabases) throws Exception
{
String principalDatabaseName = configuration.getString(baseConfigPath + ".principal-database");
PrincipalDatabase db = principalDatabases.get(principalDatabaseName);
if (db == null)
{
throw new Exception("Principal database " + principalDatabaseName + " not found. Ensure the name matches " +
"an entry in the configuration file");
}
_callbackHandler = new ServerCallbackHandler(db);
}
public CallbackHandler getCallbackHandler()
{
return _callbackHandler;
}
public Map<String, ?> getProperties()
{
// there are no properties required for the CRAM-MD5 implementation
return null;
}
}
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