/*
* Copyright 2004 The Apache Software Foundation
*
* 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.apache.ldap.server.authn;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import org.apache.ldap.common.exception.LdapAuthenticationException;
import org.apache.ldap.common.exception.LdapNameNotFoundException;
import org.apache.ldap.common.name.LdapName;
import org.apache.ldap.common.util.ArrayUtils;
import org.apache.ldap.server.jndi.ServerContext;
import org.apache.ldap.server.partition.ContextPartitionNexus;
/**
* A simple {@link Authenticator} that authenticates clear text passwords
* contained within the <code>userPassword</code> attribute in DIT.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class SimpleAuthenticator extends AbstractAuthenticator
{
/**
* Creates a new instance.
*/
public SimpleAuthenticator( )
{
super( "simple" );
}
/**
* Looks up <tt>userPassword</tt> attribute of the entry whose name is
* the value of {@link Context#SECURITY_PRINCIPAL} environment variable,
* and authenticates a user with the plain-text password.
*/
public LdapPrincipal authenticate( ServerContext ctx ) throws NamingException
{
// ---- extract password from JNDI environment
Object creds = ctx.getEnvironment().get( Context.SECURITY_CREDENTIALS );
if ( creds == null )
{
creds = ArrayUtils.EMPTY_BYTE_ARRAY;
}
else if ( creds instanceof String )
{
creds = ( ( String ) creds ).getBytes();
}
// ---- extract principal from JNDI environment
String principal;
if ( ! ctx.getEnvironment().containsKey( Context.SECURITY_PRINCIPAL ) )
{
throw new LdapAuthenticationException();
}
else
{
principal = ( String ) ctx.getEnvironment().get( Context.SECURITY_PRINCIPAL );
if ( principal == null )
{
throw new LdapAuthenticationException();
}
}
// ---- lookup the principal entry's userPassword attribute
LdapName principalDn = new LdapName( principal );
ContextPartitionNexus nexus = getFactoryConfiguration().getPartitionNexus();
Attributes userEntry = nexus.lookup( principalDn );
if ( userEntry == null )
{
throw new LdapNameNotFoundException();
}
Object userPassword;
Attribute userPasswordAttr = userEntry.get( "userPassword" );
// ---- assert that credentials match
if ( userPasswordAttr == null )
{
userPassword = ArrayUtils.EMPTY_BYTE_ARRAY;
}
else
{
userPassword = userPasswordAttr.get();
if ( userPassword instanceof String )
{
userPassword = ( ( String ) userPassword ).getBytes();
}
}
if ( ! ArrayUtils.isEquals( creds, userPassword ) )
{
throw new LdapAuthenticationException();
}
return new LdapPrincipal( principalDn );
}
}