1/* 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 */ 21package org.apache.qpid.management.common.sasl; 22 23import org.apache.harmony.javax.security.auth.callback.Callback; 24import org.apache.harmony.javax.security.auth.callback.CallbackHandler; 25import org.apache.harmony.javax.security.auth.callback.NameCallback; 26import org.apache.harmony.javax.security.auth.callback.PasswordCallback; 27import org.apache.harmony.javax.security.auth.callback.UnsupportedCallbackException; 28import java.io.IOException; 29import java.io.UnsupportedEncodingException; 30import java.security.MessageDigest; 31import java.security.NoSuchAlgorithmException; 32 33 34public class UsernameHashedPasswordCallbackHandler implements CallbackHandler 35{ 36 private String user; 37 private char[] pwchars; 38 39 public UsernameHashedPasswordCallbackHandler(String user, String password) throws Exception 40 { 41 this.user = user; 42 this.pwchars = getHash(password); 43 } 44 45 public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException 46 { 47 for (int i = 0; i < callbacks.length; i++) 48 { 49 if (callbacks[i] instanceof NameCallback) 50 { 51 NameCallback ncb = (NameCallback) callbacks[i]; 52 ncb.setName(user); 53 } 54 else if (callbacks[i] instanceof PasswordCallback) 55 { 56 PasswordCallback pcb = (PasswordCallback) callbacks[i]; 57 pcb.setPassword(pwchars); 58 } 59 else 60 { 61 throw new UnsupportedCallbackException(callbacks[i]); 62 } 63 } 64 } 65 66 67 private void clearPassword() 68 { 69 if (pwchars != null) 70 { 71 for (int i = 0 ; i < pwchars.length ; i++) 72 { 73 pwchars[i] = 0; 74 } 75 pwchars = null; 76 } 77 } 78 79 protected void finalize() 80 { 81 clearPassword(); 82 } 83 84 public static char[] getHash(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException 85 { 86 byte[] data = text.getBytes("utf-8"); 87 88 MessageDigest md = MessageDigest.getInstance("MD5"); 89 90 for (byte b : data) 91 { 92 md.update(b); 93 } 94 95 byte[] digest = md.digest(); 96 97 char[] hash = new char[digest.length ]; 98 99 int index = 0; 100 for (byte b : digest) 101 { 102 hash[index++] = (char) b; 103 } 104 105 return hash; 106 } 107} 108