org.argeo.cms/src/org/argeo/cms/internal/auth/AnonymousLoginModule.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.cms.internal.auth;
  17
  18 import java.io.IOException;
  19 import java.util.Collections;
  20 import java.util.List;
  21 import java.util.Locale;
  22
  23 import javax.security.auth.callback.Callback;
  24 import javax.security.auth.callback.CallbackHandler;
  25 import javax.security.auth.callback.UnsupportedCallbackException;
  26 import javax.security.auth.login.LoginException;
  27
  28 import org.argeo.cms.KernelHeader;
  29 import org.argeo.cms.internal.kernel.Activator;
  30 import org.argeo.util.LocaleCallback;
  31 import org.argeo.util.LocaleUtils;
  32 import org.springframework.security.authentication.AnonymousAuthenticationToken;
  33 import org.springframework.security.core.Authentication;
  34
  35 /** Login module which caches one subject per thread. */
  36 public class AnonymousLoginModule extends AbstractLoginModule {
  37         /** Comma separated list of locales */
  38         private String availableLocales = null;
  39
  40         @Override
  41         protected Authentication processLogin(CallbackHandler callbackHandler)
  42                         throws LoginException, UnsupportedCallbackException, IOException,
  43                         InterruptedException {
  44                 Locale selectedLocale = null;
  45                 // multi locale
  46                 if (callbackHandler != null)
  47                         if (availableLocales != null && !availableLocales.trim().equals("")) {
  48                                 LocaleCallback localeCallback = new LocaleCallback(
  49                                                 availableLocales);
  50                                 callbackHandler.handle(new Callback[] { localeCallback });
  51                                 selectedLocale = localeCallback.getSelectedLocale();
  52                         } else {
  53                                 callbackHandler.handle(new Callback[] {});
  54                         }
  55
  56                 List<GrantedAuthorityPrincipal> authorities = Collections
  57                                 .singletonList(new GrantedAuthorityPrincipal(
  58                                                 KernelHeader.ROLE_ANONYMOUS));
  59                 AnonymousAuthenticationToken anonymousToken = new AnonymousAuthenticationToken(
  60                                 Activator.getSystemKey(), KernelHeader.USERNAME_ANONYMOUS,
  61                                 authorities);
  62
  63                 Authentication auth = getAuthenticationManager().authenticate(
  64                                 anonymousToken);
  65
  66                 if (selectedLocale != null)
  67                         LocaleUtils.threadLocale.set(selectedLocale);
  68                 return auth;
  69         }
  70 }