/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying * information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Portions Copyright 2006 Sun Microsystems, Inc.
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*/
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package org.opends.server.extensions;
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import java.util.ArrayList;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.concurrent.locks.Lock;
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import org.opends.server.api.ConfigurableComponent;
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import org.opends.server.api.IdentityMapper;
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import org.opends.server.api.SASLMechanismHandler;
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import org.opends.server.config.ConfigAttribute;
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import org.opends.server.config.ConfigEntry;
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import org.opends.server.config.ConfigException;
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import org.opends.server.config.DNConfigAttribute;
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import org.opends.server.core.BindOperation;
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import org.opends.server.core.DirectoryException;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.core.InitializationException;
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import org.opends.server.core.LockManager;
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import org.opends.server.core.PasswordPolicyState;
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import org.opends.server.protocols.asn1.ASN1OctetString;
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import org.opends.server.types.AuthenticationInfo;
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import org.opends.server.types.ByteString;
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import org.opends.server.types.ConfigChangeResult;
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import org.opends.server.types.DN;
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import org.opends.server.types.Entry;
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import org.opends.server.types.ResultCode;
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import static org.opends.server.config.ConfigConstants.*;
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import static org.opends.server.extensions.ExtensionsConstants.*;
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import static org.opends.server.loggers.Debug.*;
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import static org.opends.server.loggers.Error.*;
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import static org.opends.server.messages.ExtensionsMessages.*;
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import static org.opends.server.messages.MessageHandler.*;
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import static org.opends.server.util.ServerConstants.*;
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import static org.opends.server.util.StaticUtils.*;
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/**
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* This class provides an implementation of a SASL mechanism that uses
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* plain-text authentication. It is based on the proposal defined in
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* draft-ietf-sasl-plain-08 in which the SASL credentials are in the form:
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* <BR>
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* <BLOCKQUOTE>[authzid] UTF8NULL authcid UTF8NULL passwd</BLOCKQUOTE>
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* <BR>
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* Note that this is a weak mechanism by itself and does not offer any
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* protection for the password, so it may need to be used in conjunction with a
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* connection security provider to prevent exposing the password.
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*/
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public class PlainSASLMechanismHandler
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extends SASLMechanismHandler
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implements ConfigurableComponent
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{
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/**
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* The fully-qualified name of this class for debugging purposes.
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*/
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private static final String CLASS_NAME =
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"org.opends.server.extensions.PlainSASLMechanismHandler";
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// The DN of the configuration entry for this SASL mechanism handler.
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private DN configEntryDN;
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// The DN of the identity mapper configuration entry.
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private DN identityMapperDN;
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// The identity mapper that will be used to map ID strings to user entries.
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private IdentityMapper identityMapper;
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/**
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* Creates a new instance of this SASL mechanism handler. No initialization
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* should be done in this method, as it should all be performed in the
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* <CODE>initializeSASLMechanismHandler</CODE> method.
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*/
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public PlainSASLMechanismHandler()
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{
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super();
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assert debugConstructor(CLASS_NAME);
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}
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/**
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* Initializes this SASL mechanism handler based on the information in the
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* provided configuration entry. It should also register itself with the
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* Directory Server for the particular kinds of SASL mechanisms that it
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* will process.
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*
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* @param configEntry The configuration entry that contains the information
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* to use to initialize this SASL mechanism handler.
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*
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* @throws ConfigException If an unrecoverable problem arises in the
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* process of performing the initialization.
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*
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* @throws InitializationException If a problem occurs during initialization
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* that is not related to the server
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* configuration.
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*/
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public void initializeSASLMechanismHandler(ConfigEntry configEntry)
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throws ConfigException, InitializationException
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{
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assert debugEnter(CLASS_NAME, "initializeSASLMechanismHandler",
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String.valueOf(configEntry));
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this.configEntryDN = configEntry.getDN();
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// Get the identity mapper that should be used to find users.
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int msgID = MSGID_SASLPLAIN_DESCRIPTION_IDENTITY_MAPPER_DN;
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DNConfigAttribute mapperStub =
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new DNConfigAttribute(ATTR_IDMAPPER_DN, getMessage(msgID), true, false,
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false);
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try
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{
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DNConfigAttribute mapperAttr =
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(DNConfigAttribute) configEntry.getConfigAttribute(mapperStub);
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if (mapperAttr == null)
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{
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msgID = MSGID_SASLPLAIN_NO_IDENTITY_MAPPER_ATTR;
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String message = getMessage(msgID, String.valueOf(configEntryDN));
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throw new ConfigException(msgID, message);
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}
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else
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{
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identityMapperDN = mapperAttr.activeValue();
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identityMapper = DirectoryServer.getIdentityMapper(identityMapperDN);
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if (identityMapper == null)
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{
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msgID = MSGID_SASLPLAIN_NO_SUCH_IDENTITY_MAPPER;
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String message = getMessage(msgID, String.valueOf(identityMapperDN),
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String.valueOf(configEntryDN));
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throw new ConfigException(msgID, message);
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}
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}
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}
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catch (ConfigException ce)
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{
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throw ce;
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}
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catch (Exception e)
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{
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assert debugException(CLASS_NAME, "initializeSASLMechanismHandler", e);
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msgID = MSGID_SASLPLAIN_CANNOT_GET_IDENTITY_MAPPER;
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String message = getMessage(msgID, String.valueOf(configEntryDN),
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stackTraceToSingleLineString(e));
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throw new InitializationException(msgID, message, e);
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}
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DirectoryServer.registerSASLMechanismHandler(SASL_MECHANISM_PLAIN, this);
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DirectoryServer.registerConfigurableComponent(this);
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}
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/**
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* Performs any finalization that may be necessary for this SASL mechanism
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* handler.
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*/
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public void finalizeSASLMechanismHandler()
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{
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assert debugEnter(CLASS_NAME, "finalizeSASLMechanismHandler");
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DirectoryServer.deregisterConfigurableComponent(this);
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DirectoryServer.deregisterSASLMechanismHandler(SASL_MECHANISM_PLAIN);
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}
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/**
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* Processes the provided SASL bind operation. Note that if the SASL
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* processing gets far enough to be able to map the associated request to a
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* user entry (regardless of whether the authentication is ultimately
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* successful), then this method must call the
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* <CODE>BindOperation.setSASLAuthUserEntry</CODE> to provide it with the
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* entry for the user that attempted to authenticate.
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*
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* @param bindOperation The SASL bind operation to be processed.
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*/
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public void processSASLBind(BindOperation bindOperation)
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{
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assert debugEnter(CLASS_NAME, "processSASLBind",
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String.valueOf(bindOperation));
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// Get the SASL credentials provided by the user and decode them.
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String authzID = null;
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String authcID = null;
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String password = null;
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ByteString saslCredentials = bindOperation.getSASLCredentials();
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if (saslCredentials == null)
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_NO_SASL_CREDENTIALS;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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String credString = saslCredentials.stringValue();
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int length = credString.length();
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int nullPos1 = credString.indexOf('\u0000');
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if (nullPos1 < 0)
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_NO_NULLS_IN_CREDENTIALS;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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if (nullPos1 > 0)
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{
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authzID = credString.substring(0, nullPos1);
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}
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int nullPos2 = credString.indexOf('\u0000', nullPos1+1);
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if (nullPos2 < 0)
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_NO_SECOND_NULL;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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if (nullPos2 == (nullPos1+1))
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_ZERO_LENGTH_AUTHCID;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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if (nullPos2 == (length-1))
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_ZERO_LENGTH_PASSWORD;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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authcID = credString.substring(nullPos1+1, nullPos2);
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password = credString.substring(nullPos2+1);
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// Get the user entry for the authentication ID. Allow for an
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// authentication ID that is just a username (as per the SASL PLAIN spec),
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// but also allow a value in the authzid form specified in RFC 2829.
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Entry userEntry = null;
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String lowerAuthcID = toLowerCase(authcID);
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if (lowerAuthcID.startsWith("dn:"))
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{
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// Try to decode the user DN and retrieve the corresponding entry.
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DN userDN;
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try
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{
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userDN = DN.decode(authcID.substring(3));
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}
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catch (DirectoryException de)
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{
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assert debugException(CLASS_NAME, "processSASLBind", de);
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_CANNOT_DECODE_AUTHCID_AS_DN;
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String message = getMessage(msgID, authcID, de.getErrorMessage());
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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if (userDN.isNullDN())
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_AUTHCID_IS_NULL_DN;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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DN rootDN = DirectoryServer.getActualRootBindDN(userDN);
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if (rootDN != null)
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{
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userDN = rootDN;
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}
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// Acquire a read lock on the user entry. If this fails, then so will the
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// authentication.
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Lock readLock = null;
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for (int i=0; i < 3; i++)
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{
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readLock = LockManager.lockRead(userDN);
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if (readLock != null)
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{
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break;
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}
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}
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if (readLock == null)
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{
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bindOperation.setResultCode(DirectoryServer.getServerErrorResultCode());
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int msgID = MSGID_SASLPLAIN_CANNOT_LOCK_ENTRY;
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String message = getMessage(msgID, String.valueOf(userDN));
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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try
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{
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userEntry = DirectoryServer.getEntry(userDN);
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}
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catch (DirectoryException de)
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{
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assert debugException(CLASS_NAME, "processSASLBind", de);
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_CANNOT_GET_ENTRY_BY_DN;
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String message = getMessage(msgID, String.valueOf(userDN),
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de.getErrorMessage());
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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finally
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{
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LockManager.unlock(userDN, readLock);
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}
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}
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else
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{
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// Use the identity mapper to resolve the username to an entry.
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if (lowerAuthcID.startsWith("u:"))
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{
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authcID = authcID.substring(2);
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}
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try
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{
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userEntry = identityMapper.getEntryForID(authcID);
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}
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catch (DirectoryException de)
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{
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assert debugException(CLASS_NAME, "processSASLBind", de);
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_CANNOT_MAP_USERNAME;
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String message = getMessage(msgID, String.valueOf(authcID),
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de.getErrorMessage());
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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}
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// At this point, we should have a user entry. If we don't then fail.
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if (userEntry == null)
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_NO_MATCHING_ENTRIES;
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String message = getMessage(msgID, authcID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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else
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{
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bindOperation.setSASLAuthUserEntry(userEntry);
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}
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// Get the password policy for the user and use it to determine if the
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// provided password was correct.
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try
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{
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PasswordPolicyState pwPolicyState =
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new PasswordPolicyState(userEntry, false, false);
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if (! pwPolicyState.passwordMatches(new ASN1OctetString(password)))
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{
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_INVALID_PASSWORD;
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String message = getMessage(msgID);
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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}
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catch (Exception e)
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{
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assert debugException(CLASS_NAME, "processSASLBind", e);
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bindOperation.setResultCode(ResultCode.INVALID_CREDENTIALS);
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int msgID = MSGID_SASLPLAIN_CANNOT_CHECK_PASSWORD_VALIDITY;
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String message = getMessage(msgID, String.valueOf(userEntry.getDN()),
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String.valueOf(e));
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bindOperation.setAuthFailureReason(msgID, message);
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return;
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}
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// FIXME -- Figure out what to do with the authzID if one was provided.
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// If we've gotten here, then the authentication was successful.
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bindOperation.setResultCode(ResultCode.SUCCESS);
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AuthenticationInfo authInfo =
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new AuthenticationInfo(userEntry.getDN(), SASL_MECHANISM_PLAIN,
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DirectoryServer.isRootDN(userEntry.getDN()));
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bindOperation.getClientConnection().setAuthenticationInfo(authInfo);
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return;
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}
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/**
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* Retrieves the DN of the configuration entry with which this component is
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* associated.
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*
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* @return The DN of the configuration entry with which this component is
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* associated.
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*/
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public DN getConfigurableComponentEntryDN()
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{
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assert debugEnter(CLASS_NAME, "getConfigurableComponentEntryDN");
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return configEntryDN;
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}
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/**
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* Retrieves the set of configuration attributes that are associated with this
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* configurable component.
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*
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* @return The set of configuration attributes that are associated with this
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* configurable component.
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*/
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public List<ConfigAttribute> getConfigurationAttributes()
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{
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assert debugEnter(CLASS_NAME, "getConfigurationAttributes");
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LinkedList<ConfigAttribute> attrList = new LinkedList<ConfigAttribute>();
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int msgID = MSGID_SASLPLAIN_DESCRIPTION_IDENTITY_MAPPER_DN;
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attrList.add(new DNConfigAttribute(ATTR_IDMAPPER_DN, getMessage(msgID),
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true, false, false, identityMapperDN));
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return attrList;
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}
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/**
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* Indicates whether the provided configuration entry has an acceptable
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* configuration for this component. If it does not, then detailed
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* information about the problem(s) should be added to the provided list.
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*
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* @param configEntry The configuration entry for which to make the
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* determination.
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* @param unacceptableReasons A list that can be used to hold messages about
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* why the provided entry does not have an
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* acceptable configuration.
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*
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* @return <CODE>true</CODE> if the provided entry has an acceptable
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* configuration for this component, or <CODE>false</CODE> if not.
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*/
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public boolean hasAcceptableConfiguration(ConfigEntry configEntry,
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List<String> unacceptableReasons)
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{
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assert debugEnter(CLASS_NAME, "hasAcceptableConfiguration",
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String.valueOf(configEntry), "java.util.List<String>");
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// Look at the identity mapper configuration.
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int msgID = MSGID_SASLPLAIN_DESCRIPTION_IDENTITY_MAPPER_DN;
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DNConfigAttribute mapperStub =
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new DNConfigAttribute(ATTR_IDMAPPER_DN, getMessage(msgID), true, false,
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false);
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try
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{
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DNConfigAttribute mapperAttr =
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(DNConfigAttribute) configEntry.getConfigAttribute(mapperStub);
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if (mapperAttr == null)
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{
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msgID = MSGID_SASLPLAIN_NO_IDENTITY_MAPPER_ATTR;
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unacceptableReasons.add(getMessage(msgID,
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String.valueOf(configEntryDN)));
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return false;
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}
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DN mapperDN = mapperAttr.pendingValue();
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if (! mapperDN.equals(identityMapperDN))
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{
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IdentityMapper mapper = DirectoryServer.getIdentityMapper(mapperDN);
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if (mapper == null)
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{
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msgID = MSGID_SASLPLAIN_NO_SUCH_IDENTITY_MAPPER;
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unacceptableReasons.add(getMessage(msgID, String.valueOf(mapperDN),
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String.valueOf(configEntryDN)));
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return false;
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}
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}
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}
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catch (Exception e)
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{
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assert debugException(CLASS_NAME, "hasAcceptableConfiguration", e);
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msgID = MSGID_SASLPLAIN_CANNOT_GET_IDENTITY_MAPPER;
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unacceptableReasons.add(getMessage(msgID, String.valueOf(configEntryDN),
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stackTraceToSingleLineString(e)));
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return false;
|
}
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|
|
// If we've gotten to this point, then everything must be OK.
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return true;
|
}
|
|
|
|
/**
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* Makes a best-effort attempt to apply the configuration contained in the
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* provided entry. Information about the result of this processing should be
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* added to the provided message list. Information should always be added to
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* this list if a configuration change could not be applied. If detailed
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* results are requested, then information about the changes applied
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* successfully (and optionally about parameters that were not changed) should
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* also be included.
|
*
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* @param configEntry The entry containing the new configuration to
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* apply for this component.
|
* @param detailedResults Indicates whether detailed information about the
|
* processing should be added to the list.
|
*
|
* @return Information about the result of the configuration update.
|
*/
|
public ConfigChangeResult applyNewConfiguration(ConfigEntry configEntry,
|
boolean detailedResults)
|
{
|
assert debugEnter(CLASS_NAME, "applyNewConfiguration",
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String.valueOf(configEntry),
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String.valueOf(detailedResults));
|
|
|
ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
|
ArrayList<String> messages = new ArrayList<String>();
|
|
|
// Look at the identity mapper configuration.
|
DN newIdentityMapperDN = null;
|
IdentityMapper newIdentityMapper = null;
|
int msgID = MSGID_SASLPLAIN_DESCRIPTION_IDENTITY_MAPPER_DN;
|
DNConfigAttribute mapperStub =
|
new DNConfigAttribute(ATTR_IDMAPPER_DN, getMessage(msgID), true, false,
|
false);
|
try
|
{
|
DNConfigAttribute mapperAttr =
|
(DNConfigAttribute) configEntry.getConfigAttribute(mapperStub);
|
if (mapperAttr == null)
|
{
|
msgID = MSGID_SASLPLAIN_NO_IDENTITY_MAPPER_ATTR;
|
messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
|
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
}
|
else
|
{
|
newIdentityMapperDN = mapperAttr.pendingValue();
|
if (! newIdentityMapperDN.equals(identityMapperDN))
|
{
|
newIdentityMapper =
|
DirectoryServer.getIdentityMapper(newIdentityMapperDN);
|
if (newIdentityMapper == null)
|
{
|
msgID = MSGID_SASLPLAIN_NO_SUCH_IDENTITY_MAPPER;
|
messages.add(getMessage(msgID, String.valueOf(newIdentityMapperDN),
|
String.valueOf(configEntryDN)));
|
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
}
|
}
|
}
|
}
|
catch (Exception e)
|
{
|
assert debugException(CLASS_NAME, "applyNewConfiguration", e);
|
|
msgID = MSGID_SASLPLAIN_CANNOT_GET_IDENTITY_MAPPER;
|
messages.add(getMessage(msgID, String.valueOf(configEntryDN),
|
stackTraceToSingleLineString(e)));
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
}
|
|
|
// If everything has been successful, then apply any changes that were made.
|
if (resultCode == ResultCode.SUCCESS)
|
{
|
if ((newIdentityMapperDN != null) && (identityMapper != null))
|
{
|
identityMapperDN = newIdentityMapperDN;
|
identityMapper = newIdentityMapper;
|
|
if (detailedResults)
|
{
|
msgID = MSGID_SASLPLAIN_UPDATED_IDENTITY_MAPPER;
|
messages.add(getMessage(msgID, String.valueOf(configEntryDN),
|
String.valueOf(identityMapperDN)));
|
}
|
}
|
}
|
|
|
// Return the result to the caller.
|
return new ConfigChangeResult(resultCode, adminActionRequired, messages);
|
}
|
|
|
|
/**
|
* Indicates whether the specified SASL mechanism is password-based or uses
|
* some other form of credentials (e.g., an SSL client certificate or Kerberos
|
* ticket).
|
*
|
* @param mechanism The name of the mechanism for which to make the
|
* determination. This will only be invoked with names of
|
* mechanisms for which this handler has previously
|
* registered.
|
*
|
* @return <CODE>true</CODE> if this SASL mechanism is password-based, or
|
* <CODE>false</CODE> if it uses some other form of credentials.
|
*/
|
public boolean isPasswordBased(String mechanism)
|
{
|
assert debugEnter(CLASS_NAME, "isPasswordBased", String.valueOf(mechanism));
|
|
// This is a password-based mechanism.
|
return true;
|
}
|
|
|
|
/**
|
* Indicates whether the specified SASL mechanism should be considered secure
|
* (i.e., it does not expose the authentication credentials in a manner that
|
* is useful to a third-party observer, and other aspects of the
|
* authentication are generally secure).
|
*
|
* @param mechanism The name of the mechanism for which to make the
|
* determination. This will only be invoked with names of
|
* mechanisms for which this handler has previously
|
* registered.
|
*
|
* @return <CODE>true</CODE> if this SASL mechanism should be considered
|
* secure, or <CODE>false</CODE> if not.
|
*/
|
public boolean isSecure(String mechanism)
|
{
|
assert debugEnter(CLASS_NAME, "isSecure", String.valueOf(mechanism));
|
|
// This is not a secure mechanism.
|
return false;
|
}
|
}
|
