| /* |
| * Copyright (c) 2015 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * 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 com.datatorrent.lib.security.auth.callback; |
| |
| import java.io.IOException; |
| |
| import javax.security.auth.callback.*; |
| import javax.security.sasl.RealmCallback; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.datatorrent.lib.security.SecurityContext; |
| |
| import com.datatorrent.api.Component; |
| |
| /** |
| * The default callback handler handles common callbacks and can be used with most common |
| * JAAS login modules. This handler can be extended to create custom callback handlers if |
| * needed. When developing a custom handler in this fashion most of time you would need to |
| * just override the processCallback method, handle the custom callback and delegate to the |
| * base class for the common callbacks. |
| * |
| * This handler implements Component to interface to receive the login information via the |
| * SecurityContext. Custom handlers being implemented from scratch without extending this |
| * handler can also extend Component to receive security information. |
| * |
| * @since 2.0.0 |
| */ |
| public class DefaultCallbackHandler implements CallbackHandler, Component<SecurityContext> |
| { |
| private static final Logger logger = LoggerFactory.getLogger(DefaultCallbackHandler.class); |
| |
| protected SecurityContext context; |
| |
| @Override |
| public void setup(SecurityContext context) |
| { |
| this.context = context; |
| } |
| |
| @Override |
| public void teardown() |
| { |
| |
| } |
| |
| @Override |
| public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException |
| { |
| for (Callback callback : callbacks) { |
| processCallback(callback); |
| } |
| } |
| |
| protected void processCallback(Callback callback) throws IOException, UnsupportedCallbackException |
| { |
| if (callback instanceof NameCallback) { |
| NameCallback namecb = (NameCallback)callback; |
| namecb.setName(context.getValue(SecurityContext.USER_NAME)); |
| } else if (callback instanceof PasswordCallback) { |
| PasswordCallback passcb = (PasswordCallback)callback; |
| passcb.setPassword(context.getValue(SecurityContext.PASSWORD)); |
| } else if (callback instanceof RealmCallback) { |
| RealmCallback realmcb = (RealmCallback) callback; |
| realmcb.setText(context.getValue(SecurityContext.REALM)); |
| } else if (callback instanceof TextOutputCallback) { |
| TextOutputCallback textcb = (TextOutputCallback)callback; |
| if (textcb.getMessageType() == TextOutputCallback.INFORMATION) { |
| logger.info(textcb.getMessage()); |
| } else if (textcb.getMessageType() == TextOutputCallback.WARNING) { |
| logger.warn(textcb.getMessage()); |
| } else if (textcb.getMessageType() == TextOutputCallback.ERROR) { |
| logger.error(textcb.getMessage()); |
| } else { |
| logger.debug("Auth message type {}, message {}", textcb.getMessageType(), textcb.getMessage()); |
| } |
| } else { |
| throw new UnsupportedCallbackException(callback); |
| } |
| } |
| } |