| /** |
| * 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.kerby.kerberos.kerb.client; |
| |
| import javax.security.auth.Subject; |
| 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.auth.kerberos.KerberosPrincipal; |
| import javax.security.auth.login.AppConfigurationEntry; |
| import javax.security.auth.login.Configuration; |
| import javax.security.auth.login.LoginContext; |
| import javax.security.auth.login.LoginException; |
| import java.io.File; |
| import java.io.IOException; |
| import java.security.Principal; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * JAAS utilities for Kerberos login. |
| */ |
| public final class JaasKrbUtil { |
| |
| public static final boolean ENABLE_DEBUG = false; |
| |
| private JaasKrbUtil() { } |
| |
| public static Subject loginUsingPassword( |
| String principal, String password) throws LoginException { |
| Set<Principal> principals = new HashSet<Principal>(); |
| principals.add(new KerberosPrincipal(principal)); |
| |
| Subject subject = new Subject(false, principals, |
| new HashSet<Object>(), new HashSet<Object>()); |
| |
| Configuration conf = usePassword(principal); |
| String confName = "PasswordConf"; |
| CallbackHandler callback = new KrbCallbackHandler(principal, password); |
| LoginContext loginContext = new LoginContext(confName, subject, callback, conf); |
| loginContext.login(); |
| return loginContext.getSubject(); |
| } |
| |
| public static Subject loginUsingTicketCache( |
| String principal, File cacheFile) throws LoginException { |
| Set<Principal> principals = new HashSet<Principal>(); |
| principals.add(new KerberosPrincipal(principal)); |
| |
| Subject subject = new Subject(false, principals, |
| new HashSet<Object>(), new HashSet<Object>()); |
| |
| Configuration conf = useTicketCache(principal, cacheFile); |
| String confName = "TicketCacheConf"; |
| LoginContext loginContext = new LoginContext(confName, subject, null, conf); |
| loginContext.login(); |
| return loginContext.getSubject(); |
| } |
| |
| public static Subject loginUsingKeytab( |
| String principal, File keytabFile) throws LoginException { |
| Set<Principal> principals = new HashSet<Principal>(); |
| principals.add(new KerberosPrincipal(principal)); |
| |
| Subject subject = new Subject(false, principals, |
| new HashSet<Object>(), new HashSet<Object>()); |
| |
| Configuration conf = useKeytab(principal, keytabFile); |
| String confName = "KeytabConf"; |
| LoginContext loginContext = new LoginContext(confName, subject, null, conf); |
| loginContext.login(); |
| return loginContext.getSubject(); |
| } |
| |
| public static Configuration usePassword(String principal) { |
| return new PasswordJaasConf(principal); |
| } |
| |
| public static Configuration useTicketCache(String principal, |
| File credentialFile) { |
| return new TicketCacheJaasConf(principal, credentialFile); |
| } |
| |
| public static Configuration useKeytab(String principal, File keytabFile) { |
| return new KeytabJaasConf(principal, keytabFile); |
| } |
| |
| private static String getKrb5LoginModuleName() { |
| return System.getProperty("java.vendor").contains("IBM") |
| ? "com.ibm.security.auth.module.Krb5LoginModule" |
| : "com.sun.security.auth.module.Krb5LoginModule"; |
| } |
| |
| static class KeytabJaasConf extends Configuration { |
| private String principal; |
| private File keytabFile; |
| |
| KeytabJaasConf(String principal, File keytab) { |
| this.principal = principal; |
| this.keytabFile = keytab; |
| } |
| |
| @Override |
| public AppConfigurationEntry[] getAppConfigurationEntry(String name) { |
| Map<String, String> options = new HashMap<String, String>(); |
| options.put("keyTab", keytabFile.getAbsolutePath()); |
| options.put("principal", principal); |
| options.put("useKeyTab", "true"); |
| options.put("storeKey", "true"); |
| options.put("doNotPrompt", "true"); |
| options.put("renewTGT", "false"); |
| options.put("refreshKrb5Config", "true"); |
| options.put("isInitiator", "true"); |
| options.put("debug", String.valueOf(ENABLE_DEBUG)); |
| |
| return new AppConfigurationEntry[]{ |
| new AppConfigurationEntry(getKrb5LoginModuleName(), |
| AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, |
| options)}; |
| } |
| } |
| |
| static class TicketCacheJaasConf extends Configuration { |
| private String principal; |
| private File clientCredentialFile; |
| |
| TicketCacheJaasConf(String principal, File clientCredentialFile) { |
| this.principal = principal; |
| this.clientCredentialFile = clientCredentialFile; |
| } |
| |
| @Override |
| public AppConfigurationEntry[] getAppConfigurationEntry(String name) { |
| Map<String, String> options = new HashMap<String, String>(); |
| options.put("principal", principal); |
| options.put("storeKey", "false"); |
| options.put("doNotPrompt", "false"); |
| options.put("useTicketCache", "true"); |
| options.put("renewTGT", "true"); |
| options.put("refreshKrb5Config", "true"); |
| options.put("isInitiator", "true"); |
| options.put("ticketCache", clientCredentialFile.getAbsolutePath()); |
| options.put("debug", String.valueOf(ENABLE_DEBUG)); |
| |
| return new AppConfigurationEntry[]{ |
| new AppConfigurationEntry(getKrb5LoginModuleName(), |
| AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, |
| options)}; |
| } |
| } |
| |
| static class PasswordJaasConf extends Configuration { |
| private String principal; |
| |
| PasswordJaasConf(String principal) { |
| this.principal = principal; |
| } |
| |
| @Override |
| public AppConfigurationEntry[] getAppConfigurationEntry(String name) { |
| Map<String, String> options = new HashMap<>(); |
| options.put("principal", principal); |
| options.put("storeKey", "true"); |
| options.put("useTicketCache", "true"); |
| options.put("useKeyTab", "false"); |
| options.put("renewTGT", "true"); |
| options.put("refreshKrb5Config", "true"); |
| options.put("isInitiator", "true"); |
| options.put("debug", String.valueOf(ENABLE_DEBUG)); |
| |
| return new AppConfigurationEntry[]{ |
| new AppConfigurationEntry(getKrb5LoginModuleName(), |
| AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, |
| options)}; |
| } |
| } |
| |
| public static class KrbCallbackHandler implements CallbackHandler { |
| private String principal; |
| private String password; |
| |
| public KrbCallbackHandler(String principal, String password) { |
| this.principal = principal; |
| this.password = password; |
| } |
| |
| public void handle(Callback[] callbacks) |
| throws IOException, UnsupportedCallbackException { |
| for (int i = 0; i < callbacks.length; i++) { |
| if (callbacks[i] instanceof PasswordCallback) { |
| PasswordCallback pc = (PasswordCallback) callbacks[i]; |
| if (pc.getPrompt().contains(principal)) { |
| pc.setPassword(password.toCharArray()); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| } |