/*
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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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* Copyright 2006-2009 Sun Microsystems, Inc.
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*/
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package org.opends.server.extensions;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import javax.security.sasl.*;
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import org.opends.messages.Message;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.meta.DigestMD5SASLMechanismHandlerCfgDefn.*;
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import org.opends.server.admin.std.server.DigestMD5SASLMechanismHandlerCfg;
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import org.opends.server.admin.std.server.SASLMechanismHandlerCfg;
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import org.opends.server.api.ClientConnection;
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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.ConfigException;
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import org.opends.server.core.BindOperation;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.loggers.debug.*;
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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.DebugLogLevel;
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import org.opends.server.types.InitializationException;
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import org.opends.server.types.ResultCode;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import static org.opends.server.loggers.ErrorLogger.logError;
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import static org.opends.messages.ExtensionMessages.*;
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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 authenticates
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* clients through DIGEST-MD5.
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*/
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public class DigestMD5SASLMechanismHandler
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extends SASLMechanismHandler<DigestMD5SASLMechanismHandlerCfg>
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implements ConfigurationChangeListener<DigestMD5SASLMechanismHandlerCfg> {
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//The tracer object for the debug logger.
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private static final DebugTracer TRACER = getTracer();
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// The current configuration for this SASL mechanism handler.
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private DigestMD5SASLMechanismHandlerCfg configuration;
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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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//Properties to use when creating a SASL server to process the authentication.
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private HashMap<String,String> saslProps;
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//The fully qualified domain name used when creating the SASL server.
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private String serverFQDN;
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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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//Property used to set the realm in the environment.
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private static final String REALM_PROPERTY =
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"com.sun.security.sasl.digest.realm";
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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 DigestMD5SASLMechanismHandler()
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{
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super();
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public void initializeSASLMechanismHandler(
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DigestMD5SASLMechanismHandlerCfg configuration)
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throws ConfigException, InitializationException {
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configuration.addDigestMD5ChangeListener(this);
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configEntryDN = configuration.dn();
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try {
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DN identityMapperDN = configuration.getIdentityMapperDN();
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identityMapper = DirectoryServer.getIdentityMapper(identityMapperDN);
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serverFQDN = getFQDN(configuration);
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Message msg= INFO_DIGEST_MD5_SERVER_FQDN.get(serverFQDN);
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logError(msg);
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String QOP = getQOP(configuration);
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saslProps = new HashMap<String,String>();
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saslProps.put(Sasl.QOP, QOP);
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String realm=getRealm(configuration);
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if(realm != null) {
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msg = INFO_DIGEST_MD5_REALM.get(realm);
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logError(msg);
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saslProps.put(REALM_PROPERTY, getRealm(configuration));
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}
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this.configuration = configuration;
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DirectoryServer.registerSASLMechanismHandler(SASL_MECHANISM_DIGEST_MD5,
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this);
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} catch (UnknownHostException unhe) {
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if (debugEnabled()) {
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TRACER.debugCaught(DebugLogLevel.ERROR, unhe);
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}
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Message message = ERR_SASL_CANNOT_GET_SERVER_FQDN.get(
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String.valueOf(configEntryDN), getExceptionMessage(unhe));
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throw new InitializationException(message, unhe);
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public void finalizeSASLMechanismHandler() {
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configuration.removeDigestMD5ChangeListener(this);
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DirectoryServer.deregisterSASLMechanismHandler(SASL_MECHANISM_DIGEST_MD5);
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public void processSASLBind(BindOperation bindOp) {
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ClientConnection clientConnection = bindOp.getClientConnection();
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if (clientConnection == null) {
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Message message = ERR_SASLGSSAPI_NO_CLIENT_CONNECTION.get();
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bindOp.setAuthFailureReason(message);
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bindOp.setResultCode(ResultCode.INVALID_CREDENTIALS);
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return;
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}
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ClientConnection clientConn = bindOp.getClientConnection();
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SASLContext saslContext =
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(SASLContext) clientConn.getSASLAuthStateInfo();
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if(saslContext == null) {
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try {
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//If the connection is secure already (i.e., TLS), then make the
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//receive buffers sizes match.
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if(clientConn.isSecure()) {
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HashMap<String, String>secProps =
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new HashMap<String,String>(saslProps);
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int maxBuf = clientConn.getAppBufferSize();
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secProps.put(Sasl.MAX_BUFFER, Integer.toString(maxBuf));
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saslContext = SASLContext.createSASLContext(secProps,
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serverFQDN, SASL_MECHANISM_DIGEST_MD5,
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identityMapper);
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} else
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saslContext = SASLContext.createSASLContext(saslProps, serverFQDN,
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SASL_MECHANISM_DIGEST_MD5, identityMapper);
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} catch (SaslException ex) {
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if (debugEnabled()) {
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TRACER.debugCaught(DebugLogLevel.ERROR, ex);
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}
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Message msg =
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ERR_SASL_CONTEXT_CREATE_ERROR.get(SASL_MECHANISM_DIGEST_MD5,
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getExceptionMessage(ex));
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clientConn.setSASLAuthStateInfo(null);
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bindOp.setAuthFailureReason(msg);
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bindOp.setResultCode(ResultCode.INVALID_CREDENTIALS);
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return;
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}
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saslContext.evaluateInitialStage(bindOp);
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} else {
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saslContext.evaluateFinalStage(bindOp);
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public boolean isPasswordBased(String mechanism)
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{
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// This is a password-based mechanism.
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public boolean isSecure(String mechanism)
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{
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// This may be considered a secure mechanism.
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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@Override()
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public boolean isConfigurationAcceptable(
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SASLMechanismHandlerCfg configuration,
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List<Message> unacceptableReasons)
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{
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DigestMD5SASLMechanismHandlerCfg config =
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(DigestMD5SASLMechanismHandlerCfg) configuration;
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return isConfigurationChangeAcceptable(config, unacceptableReasons);
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationChangeAcceptable(
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DigestMD5SASLMechanismHandlerCfg configuration,
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List<Message> unacceptableReasons)
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{
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationChange(
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DigestMD5SASLMechanismHandlerCfg configuration)
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{
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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ArrayList<Message> messages = new ArrayList<Message>();
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try {
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DN identityMapperDN = configuration.getIdentityMapperDN();
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identityMapper = DirectoryServer.getIdentityMapper(identityMapperDN);
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serverFQDN = getFQDN(configuration);
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Message msg = INFO_DIGEST_MD5_SERVER_FQDN.get(serverFQDN);
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logError(msg);
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String QOP = getQOP(configuration);
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saslProps = new HashMap<String,String>();
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saslProps.put(Sasl.QOP, QOP);
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String realm=getRealm(configuration);
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if(realm != null) {
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msg = INFO_DIGEST_MD5_REALM.get(realm);
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logError(msg);
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saslProps.put(REALM_PROPERTY, getRealm(configuration));
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}
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this.configuration = configuration;
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} catch (UnknownHostException unhe) {
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if (debugEnabled()) {
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TRACER.debugCaught(DebugLogLevel.ERROR, unhe);
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}
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resultCode = ResultCode.OPERATIONS_ERROR;
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messages.add(ERR_SASL_CANNOT_GET_SERVER_FQDN.get(
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String.valueOf(configEntryDN), getExceptionMessage(unhe)));
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return new ConfigChangeResult(resultCode,adminActionRequired,
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messages);
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}
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return new ConfigChangeResult(resultCode, adminActionRequired, messages);
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}
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/**
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* Retrieves the QOP (quality-of-protection) from the specified
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* configuration.
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*
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* @param configuration The new configuration to use.
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* @return A string representing the quality-of-protection.
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*/
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private String
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getQOP(DigestMD5SASLMechanismHandlerCfg configuration) {
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QualityOfProtection QOP = configuration.getQualityOfProtection();
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if(QOP.equals(QualityOfProtection.CONFIDENTIALITY))
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return "auth-conf";
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else if(QOP.equals(QualityOfProtection.INTEGRITY))
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return "auth-int";
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else
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return "auth";
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}
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/**
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* Returns the fully qualified name either defined in the configuration, or,
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* determined by examining the system configuration.
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*
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* @param configuration The configuration to check.
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* @return The fully qualified hostname of the server.
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*
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* @throws UnknownHostException If the name cannot be determined from the
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* system configuration.
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*/
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private String getFQDN(DigestMD5SASLMechanismHandlerCfg configuration)
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throws UnknownHostException {
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String serverName = configuration.getServerFqdn();
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if (serverName == null) {
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serverName = InetAddress.getLocalHost().getCanonicalHostName();
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}
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return serverName;
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}
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/**
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* Retrieve the realm either defined in the specified configuration. If this
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* isn't defined, the SaslServer internal code uses the server name.
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*
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* @param configuration The configuration to check.
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* @return A string representing the realm.
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*/
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private String getRealm(DigestMD5SASLMechanismHandlerCfg configuration) {
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return configuration.getRealm();
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}
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}
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