CurrentUserUtils.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.util;
  17
  18 import java.security.AccessController;
  19 import java.security.Principal;
  20 import java.security.acl.Group;
  21 import java.util.Collections;
  22 import java.util.HashSet;
  23 import java.util.Set;
  24
  25 import javax.security.auth.Subject;
  26 import javax.security.auth.x500.X500Principal;
  27
  28 import org.argeo.ArgeoException;
  29 import org.argeo.cms.CmsSession;
  30
  31 /**
  32  * Retrieves information about the current user. Not an API, can change without
  33  * notice.
  34  */
  35 class CurrentUserUtils {
  36         public final static String getUsername() {
  37                 Subject subject = getSubject();
  38                 if (subject == null)
  39                         return null;
  40                 Principal principal = subject.getPrincipals(X500Principal.class)
  41                                 .iterator().next();
  42                 return principal.getName();
  43
  44         }
  45
  46         public final static Set<String> roles() {
  47                 Set<String> roles = Collections.synchronizedSet(new HashSet<String>());
  48                 // roles.add("ROLE_USER");
  49                 Subject subject = getSubject();
  50                 X500Principal userPrincipal = subject
  51                                 .getPrincipals(X500Principal.class).iterator().next();
  52                 roles.add(userPrincipal.getName());
  53                 for (Principal group : subject.getPrincipals(Group.class)) {
  54                         roles.add(group.getName());
  55                 }
  56                 return roles;
  57         }
  58
  59         public final static Subject getSubject() {
  60                 Subject subject = Subject.getSubject(AccessController.getContext());
  61                 if (subject == null) {
  62                         subject = CmsSession.current.get().getSubject();
  63                         if (subject == null)
  64                                 throw new ArgeoException("Not authenticated.");
  65                 }
  66                 return subject;
  67         }
  68 }