| /* |
| * 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.tests.protocol; |
| |
| import java.nio.charset.StandardCharsets; |
| |
| import javax.crypto.Mac; |
| import javax.crypto.spec.SecretKeySpec; |
| |
| public class SaslUtils |
| { |
| private static final char[] HEX = "0123456789abcdef".toCharArray(); |
| |
| private static String toHex(byte[] bin) |
| { |
| StringBuilder result = new StringBuilder(2 * bin.length); |
| for (byte b : bin) { |
| result.append(HEX[(b >> 4) & 0xF]); |
| result.append(HEX[(b & 0xF)]); |
| } |
| return result.toString(); |
| } |
| public static byte[] generateCramMD5ClientResponse(String userName, String userPassword, byte[] challengeBytes) |
| throws Exception |
| { |
| String macAlgorithm = "HmacMD5"; |
| Mac mac = Mac.getInstance(macAlgorithm); |
| mac.init(new SecretKeySpec(userPassword.getBytes(StandardCharsets.UTF_8), macAlgorithm)); |
| final byte[] messageAuthenticationCode = mac.doFinal(challengeBytes); |
| String responseAsString = userName + " " + toHex(messageAuthenticationCode); |
| return responseAsString.getBytes(); |
| } |
| } |