org.apache.catalina.realm.UserDatabaseRealm Maven / Gradle / Ivy
/*
* 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.catalina.realm;
import java.security.Principal;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.naming.Context;
import org.apache.catalina.Group;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Role;
import org.apache.catalina.User;
import org.apache.catalina.UserDatabase;
import org.apache.catalina.Wrapper;
import org.apache.tomcat.util.ExceptionUtils;
/**
* Implementation of {@link org.apache.catalina.Realm} that is based on an
* implementation of {@link UserDatabase} made available through the global JNDI
* resources configured for this instance of Catalina. Set the
* resourceName parameter to the global JNDI resources name for the
* configured instance of UserDatabase that we should consult.
*
* @author Craig R. McClanahan
* @since 4.1
*/
public class UserDatabaseRealm extends RealmBase {
// ----------------------------------------------------- Instance Variables
/**
* The UserDatabase we will use to authenticate users and
* identify associated roles.
*/
protected UserDatabase database = null;
/**
* The global JNDI name of the UserDatabase resource we will be
* utilizing.
*/
protected String resourceName = "UserDatabase";
// ------------------------------------------------------------- Properties
/**
* @return the global JNDI name of the UserDatabase resource we
* will be using.
*/
public String getResourceName() {
return resourceName;
}
/**
* Set the global JNDI name of the UserDatabase resource we
* will be using.
*
* @param resourceName The new global JNDI name
*/
public void setResourceName(String resourceName) {
this.resourceName = resourceName;
}
// --------------------------------------------------------- Public Methods
/**
* Return true if the specified Principal has the specified
* security role, within the context of this Realm; otherwise return
* false. This implementation returns true if the
* User has the role, or if any Group that the
* User is a member of has the role.
*
* @param principal Principal for whom the role is to be checked
* @param role Security role to be checked
*/
@Override
public boolean hasRole(Wrapper wrapper, Principal principal, String role) {
// Check for a role alias defined in a element
if (wrapper != null) {
String realRole = wrapper.findSecurityReference(role);
if (realRole != null)
role = realRole;
}
if (principal instanceof GenericPrincipal) {
GenericPrincipal gp = (GenericPrincipal) principal;
if (gp.getUserPrincipal() instanceof User) {
principal = gp.getUserPrincipal();
}
}
if (!(principal instanceof User)) {
// Play nice with SSO and mixed Realms
// No need to pass the wrapper here because role mapping has been
// performed already a few lines above
return super.hasRole(null, principal, role);
}
if ("*".equals(role)) {
return true;
} else if (role == null) {
return false;
}
User user = (User) principal;
Role dbrole = database.findRole(role);
if (dbrole == null) {
return false;
}
if (user.isInRole(dbrole)) {
return true;
}
Iterator groups = user.getGroups();
while (groups.hasNext()) {
Group group = groups.next();
if (group.isInRole(dbrole)) {
return true;
}
}
return false;
}
// ------------------------------------------------------ Protected Methods
@Override
public void backgroundProcess() {
database.backgroundProcess();
}
/**
* Return the password associated with the given principal's user name.
*/
@Override
protected String getPassword(String username) {
User user = database.findUser(username);
if (user == null) {
return null;
}
return user.getPassword();
}
/**
* Return the Principal associated with the given user name.
*/
@Override
protected Principal getPrincipal(String username) {
User user = database.findUser(username);
if (user == null) {
return null;
}
List roles = new ArrayList<>();
Iterator uroles = user.getRoles();
while (uroles.hasNext()) {
Role role = uroles.next();
roles.add(role.getName());
}
Iterator groups = user.getGroups();
while (groups.hasNext()) {
Group group = groups.next();
uroles = group.getRoles();
while (uroles.hasNext()) {
Role role = uroles.next();
roles.add(role.getName());
}
}
return new GenericPrincipal(username, user.getPassword(), roles, user);
}
// ------------------------------------------------------ Lifecycle Methods
/**
* Prepare for the beginning of active use of the public methods of this
* component and implement the requirements of
* {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents this component from being used
*/
@Override
protected void startInternal() throws LifecycleException {
try {
Context context = getServer().getGlobalNamingContext();
database = (UserDatabase) context.lookup(resourceName);
} catch (Throwable e) {
ExceptionUtils.handleThrowable(e);
containerLog.error(sm.getString("userDatabaseRealm.lookup", resourceName), e);
database = null;
}
if (database == null) {
throw new LifecycleException(
sm.getString("userDatabaseRealm.noDatabase", resourceName));
}
super.startInternal();
}
/**
* Gracefully terminate the active use of the public methods of this
* component and implement the requirements of
* {@link org.apache.catalina.util.LifecycleBase#stopInternal()}.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
@Override
protected void stopInternal() throws LifecycleException {
// Perform normal superclass finalization
super.stopInternal();
// Release reference to our user database
database = null;
}
}