+++ /dev/null
-/*
- * Copyright 2005-2010 the original author or authors.
- *
- * Licensed 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.wamblee.security.authentication;
-
-import java.security.AccessController;
-import java.security.Principal;
-
-import java.util.Set;
-
-import javax.security.auth.Subject;
-
-/**
- * Implementation of the user accessor that retrieves user information from
- * JAAS.
- *
- * @author Erik Brakkee
- */
-public class JaasUserAccessor implements UserAccessor {
-
- /**
- * Class of the JAAS user principal.
- */
- private Class userPrincipalClass;
-
- /**
- * Constructs user accessor.
- *
- * @param aAdmin
- * User administration.
- * @param aUserClassName
- * Class name of the user principal.
- */
- public JaasUserAccessor(String aUserClassName) {
- try {
- userPrincipalClass = Class.forName(aUserClassName);
-
- if (!Principal.class.isAssignableFrom(userPrincipalClass)) {
- throw new IllegalArgumentException("Specified class '" +
- aUserClassName + "' is not a subclass of '" +
- Principal.class.getName());
- }
- } catch (ClassNotFoundException e) {
- throw new RuntimeException(e);
- }
- }
-
- @Override
- public String getCurrentUser() {
- Subject subject = Subject.getSubject(AccessController.getContext());
-
- if (subject == null) {
- return null;
- }
-
- Principal userPrincipal = getUserPrincipal(subject);
-
- return userPrincipal.getName();
- }
-
- /**
- * Gets the user principal from the subject.
- *
- * @param aSubject
- * Subject.
- *
- * @return User principal.
- *
- * @throws IllegalArgumentException
- * In case there is a duplicate principal or the principal was
- * not found.
- */
- private Principal getUserPrincipal(Subject aSubject) {
- Set<Principal> principals = aSubject.getPrincipals();
- Principal userPrincipal = null;
-
- for (Principal principal : principals) {
- if (principal.getClass().equals(userPrincipalClass)) {
- if (userPrincipal != null) {
- throw new IllegalArgumentException(
- "Multiple principals for class '" + userPrincipalClass +
- "', subject: " + aSubject);
- }
-
- userPrincipal = principal;
- }
- }
-
- if (userPrincipal == null) {
- throw new IllegalArgumentException(
- "No user principal found for class '" + userPrincipalClass +
- "', subject: " + aSubject);
- }
-
- return userPrincipal;
- }
-}