| /* |
| * 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.jms.sasl; |
| |
| import java.nio.charset.StandardCharsets; |
| import java.security.Principal; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Implements the SASL XOAUTH2 authentication Mechanism . |
| * |
| * User name and Password values are sent without being encrypted. |
| */ |
| public class XOauth2Mechanism extends AbstractMechanism { |
| |
| private static final Pattern ACCESS_TOKEN_PATTERN = Pattern.compile("^[\\x20-\\x7F]+$"); |
| private String additionalFailureInformation; |
| |
| @Override |
| public int getPriority() { |
| return PRIORITY.LOWER_STILL.getValue(); |
| } |
| |
| @Override |
| public String getName() { |
| return "XOAUTH2"; |
| } |
| |
| @Override |
| public byte[] getInitialResponse() { |
| |
| String username = getUsername(); |
| String password = getPassword(); |
| |
| if (username == null) { |
| username = ""; |
| } |
| |
| if (password == null) { |
| password = ""; |
| } |
| |
| byte[] usernameBytes = username.getBytes(StandardCharsets.UTF_8); |
| byte[] passwordBytes = password.getBytes(StandardCharsets.UTF_8); |
| byte[] data = new byte[usernameBytes.length + passwordBytes.length + 20]; |
| System.arraycopy("user=".getBytes(StandardCharsets.US_ASCII), 0, data, 0, 5); |
| System.arraycopy(usernameBytes, 0, data, 5, usernameBytes.length); |
| data[5+usernameBytes.length] = 1; |
| System.arraycopy("auth=Bearer ".getBytes(StandardCharsets.US_ASCII), 0, data, 6+usernameBytes.length, 12); |
| System.arraycopy(passwordBytes, 0, data, 18 + usernameBytes.length, passwordBytes.length); |
| data[data.length-2] = 1; |
| data[data.length-1] = 1; |
| |
| return data; |
| } |
| |
| @Override |
| public byte[] getChallengeResponse(byte[] challenge) { |
| if(challenge != null && challenge.length > 0 && additionalFailureInformation == null) { |
| additionalFailureInformation = new String(challenge, StandardCharsets.UTF_8); |
| } |
| return EMPTY; |
| } |
| |
| @Override |
| public boolean isApplicable(String username, String password, Principal localPrincipal) { |
| if(username != null && username.length() > 0 && password != null && password.length() > 0) { |
| return ACCESS_TOKEN_PATTERN.matcher(password).matches(); |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public String getAdditionalFailureInformation() { |
| return additionalFailureInformation; |
| } |
| } |