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java/org/apache/catalina/realm/UserDatabaseRealm.java
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257
java/org/apache/catalina/realm/UserDatabaseRealm.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.realm;
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import java.security.Principal;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import javax.naming.Context;
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import org.apache.catalina.Group;
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import org.apache.catalina.LifecycleException;
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import org.apache.catalina.Role;
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import org.apache.catalina.User;
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import org.apache.catalina.UserDatabase;
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import org.apache.catalina.Wrapper;
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import org.apache.catalina.users.MemoryUserDatabase;
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import org.apache.tomcat.util.ExceptionUtils;
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/**
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* Implementation of {@link org.apache.catalina.Realm} that is based on an
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* implementation of {@link UserDatabase} made available through the global JNDI
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* resources configured for this instance of Catalina. Set the
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* <code>resourceName</code> parameter to the global JNDI resources name for the
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* configured instance of <code>UserDatabase</code> that we should consult.
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*
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* @author Craig R. McClanahan
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* @since 4.1
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*/
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public class UserDatabaseRealm extends RealmBase {
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// ----------------------------------------------------- Instance Variables
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/**
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* The <code>UserDatabase</code> we will use to authenticate users and
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* identify associated roles.
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*/
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protected UserDatabase database = null;
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/**
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* Descriptive information about this Realm implementation.
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* @deprecated This will be removed in Tomcat 9 onwards.
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*/
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@Deprecated
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protected static final String name = "UserDatabaseRealm";
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/**
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* The global JNDI name of the <code>UserDatabase</code> resource we will be
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* utilizing.
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*/
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protected String resourceName = "UserDatabase";
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// ------------------------------------------------------------- Properties
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/**
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* @return the global JNDI name of the <code>UserDatabase</code> resource we
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* will be using.
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*/
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public String getResourceName() {
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return resourceName;
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}
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/**
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* Set the global JNDI name of the <code>UserDatabase</code> resource we
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* will be using.
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*
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* @param resourceName The new global JNDI name
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*/
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public void setResourceName(String resourceName) {
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this.resourceName = resourceName;
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}
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// --------------------------------------------------------- Public Methods
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/**
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* Return <code>true</code> if the specified Principal has the specified
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* security role, within the context of this Realm; otherwise return
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* <code>false</code>. This implementation returns <code>true</code> if the
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* <code>User</code> has the role, or if any <code>Group</code> that the
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* <code>User</code> is a member of has the role.
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*
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* @param principal Principal for whom the role is to be checked
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* @param role Security role to be checked
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*/
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@Override
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public boolean hasRole(Wrapper wrapper, Principal principal, String role) {
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// Check for a role alias defined in a <security-role-ref> element
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if (wrapper != null) {
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String realRole = wrapper.findSecurityReference(role);
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if (realRole != null)
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role = realRole;
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}
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if (principal instanceof GenericPrincipal) {
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GenericPrincipal gp = (GenericPrincipal) principal;
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if (gp.getUserPrincipal() instanceof User) {
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principal = gp.getUserPrincipal();
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}
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}
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if (!(principal instanceof User)) {
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// Play nice with SSO and mixed Realms
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// No need to pass the wrapper here because role mapping has been
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// performed already a few lines above
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return super.hasRole(null, principal, role);
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}
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if ("*".equals(role)) {
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return true;
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} else if (role == null) {
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return false;
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}
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User user = (User) principal;
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Role dbrole = database.findRole(role);
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if (dbrole == null) {
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return false;
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}
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if (user.isInRole(dbrole)) {
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return true;
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}
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Iterator<Group> groups = user.getGroups();
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while (groups.hasNext()) {
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Group group = groups.next();
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if (group.isInRole(dbrole)) {
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return true;
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}
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}
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return false;
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}
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// ------------------------------------------------------ Protected Methods
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@Override
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@Deprecated
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protected String getName() {
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return name;
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}
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@Override
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public void backgroundProcess() {
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if (database instanceof MemoryUserDatabase) {
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((MemoryUserDatabase) database).backgroundProcess();
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}
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}
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/**
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* Return the password associated with the given principal's user name.
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*/
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@Override
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protected String getPassword(String username) {
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User user = database.findUser(username);
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if (user == null) {
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return null;
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}
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return user.getPassword();
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}
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/**
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* Return the Principal associated with the given user name.
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*/
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@Override
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protected Principal getPrincipal(String username) {
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User user = database.findUser(username);
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if (user == null) {
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return null;
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}
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List<String> roles = new ArrayList<>();
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Iterator<Role> uroles = user.getRoles();
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while (uroles.hasNext()) {
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Role role = uroles.next();
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roles.add(role.getName());
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}
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Iterator<Group> groups = user.getGroups();
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while (groups.hasNext()) {
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Group group = groups.next();
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uroles = group.getRoles();
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while (uroles.hasNext()) {
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Role role = uroles.next();
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roles.add(role.getName());
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}
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}
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return new GenericPrincipal(username, user.getPassword(), roles, user);
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}
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// ------------------------------------------------------ Lifecycle Methods
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/**
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* Prepare for the beginning of active use of the public methods of this
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* component and implement the requirements of
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* {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
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*
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* @exception LifecycleException if this component detects a fatal error
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* that prevents this component from being used
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*/
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@Override
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protected void startInternal() throws LifecycleException {
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try {
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Context context = getServer().getGlobalNamingContext();
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database = (UserDatabase) context.lookup(resourceName);
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} catch (Throwable e) {
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ExceptionUtils.handleThrowable(e);
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containerLog.error(sm.getString("userDatabaseRealm.lookup", resourceName), e);
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database = null;
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}
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if (database == null) {
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throw new LifecycleException(
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sm.getString("userDatabaseRealm.noDatabase", resourceName));
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}
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super.startInternal();
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}
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/**
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* Gracefully terminate the active use of the public methods of this
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* component and implement the requirements of
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* {@link org.apache.catalina.util.LifecycleBase#stopInternal()}.
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*
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* @exception LifecycleException if this component detects a fatal error
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* that needs to be reported
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*/
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@Override
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protected void stopInternal() throws LifecycleException {
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// Perform normal superclass finalization
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super.stopInternal();
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// Release reference to our user database
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database = null;
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}
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}
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