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/*
* 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.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import javax.naming.Context;
import javax.sql.DataSource;
import org.apache.catalina.LifecycleException;
import org.apache.naming.ContextBindings;
/**
*
* Implementation of Realm that works with any JDBC JNDI DataSource.
* See the JDBCRealm.howto for more details on how to set up the database and
* for configuration options.
*
* @author Glenn L. Nielsen
* @author Craig R. McClanahan
* @author Carson McDonald
* @author Ignacio Ortega
* @version $Revision: 1079405 $
*/
public class DataSourceRealm
extends RealmBase {
// ----------------------------------------------------- Instance Variables
/**
* The generated string for the roles PreparedStatement
*/
private String preparedRoles = null;
/**
* The generated string for the credentials PreparedStatement
*/
private String preparedCredentials = null;
/**
* The name of the JNDI JDBC DataSource
*/
protected String dataSourceName = null;
/**
* Descriptive information about this Realm implementation.
*/
protected static final String info =
"org.apache.catalina.realm.DataSourceRealm/1.0";
/**
* Context local datasource.
*/
protected boolean localDataSource = false;
/**
* Descriptive information about this Realm implementation.
*/
protected static final String name = "DataSourceRealm";
/**
* The column in the user role table that names a role
*/
protected String roleNameCol = null;
/**
* The column in the user table that holds the user's credentials
*/
protected String userCredCol = null;
/**
* The column in the user table that holds the user's name
*/
protected String userNameCol = null;
/**
* The table that holds the relation between user's and roles
*/
protected String userRoleTable = null;
/**
* The table that holds user data.
*/
protected String userTable = null;
// ------------------------------------------------------------- Properties
/**
* Return the name of the JNDI JDBC DataSource.
*
*/
public String getDataSourceName() {
return dataSourceName;
}
/**
* Set the name of the JNDI JDBC DataSource.
*
* @param dataSourceName the name of the JNDI JDBC DataSource
*/
public void setDataSourceName( String dataSourceName) {
this.dataSourceName = dataSourceName;
}
/**
* Return if the datasource will be looked up in the webapp JNDI Context.
*/
public boolean getLocalDataSource() {
return localDataSource;
}
/**
* Set to true to cause the datasource to be looked up in the webapp JNDI
* Context.
*
* @param localDataSource the new flag value
*/
public void setLocalDataSource(boolean localDataSource) {
this.localDataSource = localDataSource;
}
/**
* Return the column in the user role table that names a role.
*
*/
public String getRoleNameCol() {
return roleNameCol;
}
/**
* Set the column in the user role table that names a role.
*
* @param roleNameCol The column name
*/
public void setRoleNameCol( String roleNameCol ) {
this.roleNameCol = roleNameCol;
}
/**
* Return the column in the user table that holds the user's credentials.
*
*/
public String getUserCredCol() {
return userCredCol;
}
/**
* Set the column in the user table that holds the user's credentials.
*
* @param userCredCol The column name
*/
public void setUserCredCol( String userCredCol ) {
this.userCredCol = userCredCol;
}
/**
* Return the column in the user table that holds the user's name.
*
*/
public String getUserNameCol() {
return userNameCol;
}
/**
* Set the column in the user table that holds the user's name.
*
* @param userNameCol The column name
*/
public void setUserNameCol( String userNameCol ) {
this.userNameCol = userNameCol;
}
/**
* Return the table that holds the relation between user's and roles.
*
*/
public String getUserRoleTable() {
return userRoleTable;
}
/**
* Set the table that holds the relation between user's and roles.
*
* @param userRoleTable The table name
*/
public void setUserRoleTable( String userRoleTable ) {
this.userRoleTable = userRoleTable;
}
/**
* Return the table that holds user data..
*
*/
public String getUserTable() {
return userTable;
}
/**
* Set the table that holds user data.
*
* @param userTable The table name
*/
public void setUserTable( String userTable ) {
this.userTable = userTable;
}
/**
* Return descriptive information about this Realm implementation and
* the corresponding version number, in the format
* <description>/<version>.
*/
@Override
public String getInfo() {
return info;
}
// --------------------------------------------------------- Public Methods
/**
* Return the Principal associated with the specified username and
* credentials, if there is one; otherwise return null.
*
* If there are any errors with the JDBC connection, executing
* the query or anything we return null (don't authenticate). This
* event is also logged, and the connection will be closed so that
* a subsequent request will automatically re-open it.
*
* @param username Username of the Principal to look up
* @param credentials Password or other credentials to use in
* authenticating this username
*/
@Override
public Principal authenticate(String username, String credentials) {
// No user or no credentials
// Can't possibly authenticate, don't bother the database then
if (username == null || credentials == null) {
return null;
}
Connection dbConnection = null;
// Ensure that we have an open database connection
dbConnection = open();
if (dbConnection == null) {
// If the db connection open fails, return "not authenticated"
return null;
}
// Acquire a Principal object for this user
Principal principal = authenticate(dbConnection, username, credentials);
close(dbConnection);
return principal;
}
// -------------------------------------------------------- Package Methods
// ------------------------------------------------------ Protected Methods
/**
* Return the Principal associated with the specified username and
* credentials, if there is one; otherwise return null.
*
* @param dbConnection The database connection to be used
* @param username Username of the Principal to look up
* @param credentials Password or other credentials to use in
* authenticating this username
*/
protected Principal authenticate(Connection dbConnection,
String username,
String credentials) {
String dbCredentials = getPassword(dbConnection, username);
// Validate the user's credentials
boolean validated = false;
if (hasMessageDigest()) {
// Hex hashes should be compared case-insensitive
validated = (digest(credentials).equalsIgnoreCase(dbCredentials));
} else
validated = (digest(credentials).equals(dbCredentials));
if (validated) {
if (containerLog.isTraceEnabled())
containerLog.trace(
sm.getString("dataSourceRealm.authenticateSuccess",
username));
} else {
if (containerLog.isTraceEnabled())
containerLog.trace(
sm.getString("dataSourceRealm.authenticateFailure",
username));
return (null);
}
ArrayList list = getRoles(dbConnection, username);
// Create and return a suitable Principal for this user
return (new GenericPrincipal(username, credentials, list));
}
/**
* Close the specified database connection.
*
* @param dbConnection The connection to be closed
*/
protected void close(Connection dbConnection) {
// Do nothing if the database connection is already closed
if (dbConnection == null)
return;
// Commit if not auto committed
try {
if (!dbConnection.getAutoCommit()) {
dbConnection.commit();
}
} catch (SQLException e) {
containerLog.error("Exception committing connection before closing:", e);
}
// Close this database connection, and log any errors
try {
dbConnection.close();
} catch (SQLException e) {
containerLog.error(sm.getString("dataSourceRealm.close"), e); // Just log it here
}
}
/**
* Open the specified database connection.
*
* @return Connection to the database
*/
protected Connection open() {
try {
Context context = null;
if (localDataSource) {
context = ContextBindings.getClassLoader();
context = (Context) context.lookup("comp/env");
} else {
context = getServer().getGlobalNamingContext();
}
DataSource dataSource = (DataSource)context.lookup(dataSourceName);
return dataSource.getConnection();
} catch (Exception e) {
// Log the problem for posterity
containerLog.error(sm.getString("dataSourceRealm.exception"), e);
}
return null;
}
/**
* Return a short name for this Realm implementation.
*/
@Override
protected String getName() {
return (name);
}
/**
* Return the password associated with the given principal's user name.
*/
@Override
protected String getPassword(String username) {
Connection dbConnection = null;
// Ensure that we have an open database connection
dbConnection = open();
if (dbConnection == null) {
return null;
}
try {
return getPassword(dbConnection, username);
} finally {
close(dbConnection);
}
}
/**
* Return the password associated with the given principal's user name.
* @param dbConnection The database connection to be used
* @param username Username for which password should be retrieved
*/
protected String getPassword(Connection dbConnection,
String username) {
ResultSet rs = null;
PreparedStatement stmt = null;
String dbCredentials = null;
try {
stmt = credentials(dbConnection, username);
rs = stmt.executeQuery();
if (rs.next()) {
dbCredentials = rs.getString(1);
}
return (dbCredentials != null) ? dbCredentials.trim() : null;
} catch(SQLException e) {
containerLog.error(
sm.getString("dataSourceRealm.getPassword.exception",
username));
} finally {
try {
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
containerLog.error(
sm.getString("dataSourceRealm.getPassword.exception",
username));
}
}
return null;
}
/**
* Return the Principal associated with the given user name.
*/
@Override
protected Principal getPrincipal(String username) {
Connection dbConnection = open();
if (dbConnection == null) {
return new GenericPrincipal(username, null, null);
}
try {
return (new GenericPrincipal(username,
getPassword(dbConnection, username),
getRoles(dbConnection, username)));
} finally {
close(dbConnection);
}
}
/**
* Return the roles associated with the given user name.
* @param username Username for which roles should be retrieved
*/
protected ArrayList getRoles(String username) {
Connection dbConnection = null;
// Ensure that we have an open database connection
dbConnection = open();
if (dbConnection == null) {
return null;
}
try {
return getRoles(dbConnection, username);
} finally {
close(dbConnection);
}
}
/**
* Return the roles associated with the given user name
* @param dbConnection The database connection to be used
* @param username Username for which roles should be retrieved
*/
protected ArrayList getRoles(Connection dbConnection,
String username) {
ResultSet rs = null;
PreparedStatement stmt = null;
ArrayList list = null;
try {
stmt = roles(dbConnection, username);
rs = stmt.executeQuery();
list = new ArrayList();
while (rs.next()) {
String role = rs.getString(1);
if (role != null) {
list.add(role.trim());
}
}
return list;
} catch(SQLException e) {
containerLog.error(
sm.getString("dataSourceRealm.getRoles.exception", username));
}
finally {
try {
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
} catch (SQLException e) {
containerLog.error(
sm.getString("dataSourceRealm.getRoles.exception",
username));
}
}
return null;
}
/**
* Return a PreparedStatement configured to perform the SELECT required
* to retrieve user credentials for the specified username.
*
* @param dbConnection The database connection to be used
* @param username Username for which credentials should be retrieved
*
* @exception SQLException if a database error occurs
*/
private PreparedStatement credentials(Connection dbConnection,
String username)
throws SQLException {
PreparedStatement credentials =
dbConnection.prepareStatement(preparedCredentials);
credentials.setString(1, username);
return (credentials);
}
/**
* Return a PreparedStatement configured to perform the SELECT required
* to retrieve user roles for the specified username.
*
* @param dbConnection The database connection to be used
* @param username Username for which roles should be retrieved
*
* @exception SQLException if a database error occurs
*/
private PreparedStatement roles(Connection dbConnection, String username)
throws SQLException {
PreparedStatement roles =
dbConnection.prepareStatement(preparedRoles);
roles.setString(1, username);
return (roles);
}
// ------------------------------------------------------ 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 {
// Create the roles PreparedStatement string
StringBuilder temp = new StringBuilder("SELECT ");
temp.append(roleNameCol);
temp.append(" FROM ");
temp.append(userRoleTable);
temp.append(" WHERE ");
temp.append(userNameCol);
temp.append(" = ?");
preparedRoles = temp.toString();
// Create the credentials PreparedStatement string
temp = new StringBuilder("SELECT ");
temp.append(userCredCol);
temp.append(" FROM ");
temp.append(userTable);
temp.append(" WHERE ");
temp.append(userNameCol);
temp.append(" = ?");
preparedCredentials = temp.toString();
super.startInternal();
}
}
