/*
* 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.felix.example.jaas.jdbc;
import java.io.IOException;
import java.security.Principal;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
import javax.sql.DataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The code is based on org.apache.karaf.jaas.modules.jdbc.JDBCLoginModule
*/
public class JdbcLoginModule implements LoginModule {
private static Logger log = LoggerFactory.getLogger(JdbcLoginModule.class);
private final DataSource dataSource;
private CallbackHandler callbackHandler;
private Set<Principal> principals;
private boolean detailedLoginExcepion;
private Subject subject;
private final String passwordQuery;
private final String roleQuery;
public JdbcLoginModule(DataSource dataSource, String passwordQuery, String roleQuery) {
this.dataSource = dataSource;
this.passwordQuery = passwordQuery;
this.roleQuery = roleQuery;
}
@Override
public void initialize(Subject subject, CallbackHandler callbackHandler,
Map<String, ?> sharedState, Map<String, ?> options) {
this.callbackHandler = callbackHandler;
this.subject = subject;
}
@Override
public boolean login() throws LoginException {
Connection connection = null;
PreparedStatement passwordStatement = null;
PreparedStatement roleStatement = null;
ResultSet passwordResultSet = null;
ResultSet roleResultSet = null;
Callback[] callbacks = new Callback[2];
callbacks[0] = new NameCallback("Username: ");
callbacks[1] = new PasswordCallback("Password: ", false);
try {
callbackHandler.handle(callbacks);
} catch (IOException ioe) {
throw new LoginException(ioe.getMessage());
} catch (UnsupportedCallbackException uce) {
throw new LoginException(uce.getMessage() + " not available to obtain information from user");
}
String user = ((NameCallback) callbacks[0]).getName();
char[] tmpPassword = ((PasswordCallback) callbacks[1]).getPassword();
if (tmpPassword == null) {
tmpPassword = new char[0];
}
String password = new String(tmpPassword);
principals = new HashSet<Principal>();
try {
connection = dataSource.getConnection();
//Retrieve user credentials from database.
passwordStatement = connection.prepareStatement(passwordQuery);
passwordStatement.setString(1, user);
passwordResultSet = passwordStatement.executeQuery();
if (!passwordResultSet.next()) {
if (!this.detailedLoginExcepion) {
throw new LoginException("login failed");
} else {
throw new LoginException("Password for " + user + " does not match");
}
} else {
String storedPassword = passwordResultSet.getString(1);
if (!checkPassword(password, storedPassword)) {
if (!this.detailedLoginExcepion) {
throw new LoginException("login failed");
} else {
throw new LoginException("Password for " + user + " does not match");
}
}
principals.add(new UserPrincipal(user));
}
//Retrieve user roles from database
roleStatement = connection.prepareStatement(roleQuery);
roleStatement.setString(1, user);
roleResultSet = roleStatement.executeQuery();
while (roleResultSet.next()) {
String role = roleResultSet.getString(1);
principals.add(new RolePrincipal(role));
}
} catch (Exception ex) {
throw new LoginException("Error has occured while retrieving credentials from database:" + ex.getMessage());
} finally {
try {
if (passwordResultSet != null) {
passwordResultSet.close();
}
if (passwordStatement != null) {
passwordStatement.close();
}
if (roleResultSet != null) {
roleResultSet.close();
}
if (roleStatement != null) {
roleStatement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException ex) {
log.warn("Failed to clearly close connection to the database:", ex);
}
}
return true;
}
private boolean checkPassword(String password, String storedPassword) {
return password.equals(storedPassword);
}
@Override
public boolean commit() throws LoginException {
subject.getPrincipals().addAll(principals);
return true;
}
@Override
public boolean abort() throws LoginException {
subject.getPrincipals().removeAll(principals);
principals.clear();
return true;
}
@Override
public boolean logout() throws LoginException {
return false;
}
}