| /* |
| * |
| * 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.client.security.oauth2; |
| |
| import java.io.IOException; |
| |
| import javax.security.auth.callback.Callback; |
| import javax.security.auth.callback.CallbackHandler; |
| import javax.security.auth.callback.PasswordCallback; |
| import javax.security.auth.callback.UnsupportedCallbackException; |
| import javax.security.sasl.SaslClient; |
| import javax.security.sasl.SaslException; |
| |
| public class OAuth2SaslClient implements SaslClient |
| { |
| public static final String MECHANISM = "XOAUTH2"; |
| private final CallbackHandler _callbackHandler; |
| private boolean _isComplete = false; |
| |
| public OAuth2SaslClient(CallbackHandler callbackHandler) |
| { |
| _callbackHandler = callbackHandler; |
| } |
| |
| @Override |
| public String getMechanismName() |
| { |
| return MECHANISM; |
| } |
| |
| @Override |
| public boolean hasInitialResponse() |
| { |
| return true; |
| } |
| |
| @Override |
| public byte[] evaluateChallenge(byte[] challenge) throws SaslException |
| { |
| if (_isComplete) |
| { |
| return new byte[0]; |
| } |
| |
| PasswordCallback callback = new PasswordCallback("promptunused", false); |
| Callback[] callbacks = new Callback[] {callback}; |
| try |
| { |
| _callbackHandler.handle(callbacks); |
| } |
| catch (UnsupportedCallbackException e) |
| { |
| throw new SaslException("Unsupported callback", e); |
| } |
| catch (IOException e) |
| { |
| throw new SaslException("Failed to execute callback", e); |
| } |
| |
| String accessToken = new String(callback.getPassword()); |
| if (accessToken == null || accessToken.length() == 0) |
| { |
| throw new SaslException("OAuth2SaslClient requires that the OAuth2 access token is" |
| + " supplied via the connection's password"); |
| } |
| byte[] response = String.format("auth=Bearer %s\1\1", accessToken).getBytes(); |
| _isComplete = true; |
| return response; |
| } |
| |
| @Override |
| public boolean isComplete() |
| { |
| return _isComplete; |
| } |
| |
| @Override |
| public Object getNegotiatedProperty(String propName) |
| { |
| return null; |
| } |
| |
| @Override |
| public byte[] unwrap(byte[] incoming, int offset, int len) throws SaslException |
| { |
| throw new SaslException(); |
| } |
| |
| @Override |
| public byte[] wrap(byte[] outgoing, int offset, int len) throws SaslException |
| { |
| throw new SaslException(); |
| } |
| |
| @Override |
| public void dispose() throws SaslException |
| { |
| } |
| } |