| /** |
| * 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 com.datatorrent.stram.security; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import javax.security.auth.Subject; |
| import javax.security.auth.callback.*; |
| import javax.security.auth.login.AppConfigurationEntry; |
| import javax.security.auth.login.AppConfigurationEntry.LoginModuleControlFlag; |
| import javax.security.auth.login.Configuration; |
| import javax.security.auth.login.LoginContext; |
| import javax.security.auth.login.LoginException; |
| |
| /** |
| * <p>KerberosAuth class.</p> |
| * |
| * @since 0.3.2 |
| */ |
| public class KerberosAuth |
| { |
| |
| public static Subject loginUser(String principal, char[] password) throws LoginException, IOException { |
| Subject subject = new Subject(); |
| LoginContext lc = new LoginContext(com.datatorrent.stram.security.KerberosAuth.class.getName(), subject, new AuthenticationHandler(principal, password), |
| new KerberosConfiguration(principal)); |
| lc.login(); |
| return subject; |
| //return UserGroupInformation.getUGIFromTicketCache(ticketCache, principal); |
| } |
| |
| private static class AuthenticationHandler implements CallbackHandler { |
| |
| private final String principal; |
| private final char[] password; |
| |
| AuthenticationHandler(String principal, char[] password) { |
| this.principal = principal; |
| this.password = password; |
| } |
| |
| @Override |
| public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException |
| { |
| for (Callback callback : callbacks) { |
| if (callback instanceof NameCallback) { |
| NameCallback nameCallback = (NameCallback)callback; |
| nameCallback.setName(principal); |
| } else if (callback instanceof PasswordCallback) { |
| PasswordCallback passwordCallback = (PasswordCallback)callback; |
| passwordCallback.setPassword(password); |
| } |
| } |
| } |
| |
| } |
| |
| private static class KerberosConfiguration extends Configuration { |
| |
| private final String principal; |
| |
| KerberosConfiguration(String principal) { |
| this.principal = principal; |
| } |
| |
| @Override |
| public AppConfigurationEntry[] getAppConfigurationEntry(String name) { |
| if (name.equals(com.datatorrent.stram.security.KerberosAuth.class.getName())) { |
| AppConfigurationEntry[] configEntries = new AppConfigurationEntry[1]; |
| HashMap<String,String> params = new HashMap<String, String>(); |
| params.put("useTicketCache", "true"); |
| params.put("principal", principal); |
| configEntries[0] = new AppConfigurationEntry("com.sun.security.auth.module.Krb5LoginModule", LoginModuleControlFlag.REQUIRED, params ); |
| return configEntries; |
| } else { |
| return null; |
| } |
| } |
| } |
| |
| } |