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/** * <a href="http://www.openolat.org"> * OpenOLAT - Online Learning and Training</a><br> * <p> * Licensed under the Apache License, Version 2.0 (the "License"); <br> * you may not use this file except in compliance with the License.<br> * You may obtain a copy of the License at the * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a> * <p> * Unless required by applicable law or agreed to in writing,<br> * software distributed under the License is distributed on an "AS IS" BASIS, <br> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br> * See the License for the specific language governing permissions and <br> * limitations under the License. * <p> * Initial code contributed and copyrighted by<br> * frentix GmbH, http://www.frentix.com * <p> */package org.olat.course.archiver;import org.apache.logging.log4j.Logger;import org.olat.core.gui.UserRequest;import org.olat.core.logging.Tracing;import org.olat.core.util.StringHelper;import org.olat.core.util.prefs.Preferences;import org.olat.core.util.xml.XStreamHelper;import com.thoughtworks.xstream.XStream;import com.thoughtworks.xstream.security.ExplicitTypePermission;/** * this class reads and writes XML serialized config data to personal gui prefs and retrieves them * * Initial Date: 21.04.2017 * @author fkiefer, [email protected], www.frentix.com */public class FormatConfigHelper { private static final String QTI_EXPORT_ITEM_FORMAT_CONFIG = "QTIExportItemFormatConfig"; private static final Logger log = Tracing.createLoggerFor(FormatConfigHelper.class); private static final XStream configXstream = XStreamHelper.createXStreamInstance(); static { Class<?>[] types = new Class[] { ExportFormat.class }; // BUG: CWE-91 XML Injection (aka Blind XPath Injection) // XStream.setupDefaultSecurity(configXstream); // FIXED: configXstream.addPermission(new ExplicitTypePermission(types)); configXstream.alias(QTI_EXPORT_ITEM_FORMAT_CONFIG, ExportFormat.class); } public static ExportFormat loadExportFormat(UserRequest ureq) { ExportFormat formatConfig = null; if (ureq != null) { try { Preferences guiPrefs = ureq.getUserSession().getGuiPreferences(); String formatConfigString = (String) guiPrefs.get(ExportOptionsController.class, QTI_EXPORT_ITEM_FORMAT_CONFIG); if(StringHelper.containsNonWhitespace(formatConfigString)) { formatConfig = (ExportFormat)configXstream.fromXML(formatConfigString); } else { formatConfig = new ExportFormat(true, true, true, true, true); } } catch (Exception e) { log.error("could not establish object from xml", e); formatConfig = new ExportFormat(true, true, true, true, true); } } return formatConfig; } public static void updateExportFormat(UserRequest ureq, boolean responsecols, boolean poscol, boolean pointcol, boolean timecols, boolean commentcol) { // save new config in GUI prefs Preferences guiPrefs = ureq.getUserSession().getGuiPreferences(); if (guiPrefs != null) { ExportFormat formatConfig = new ExportFormat(responsecols, poscol, pointcol, timecols, commentcol); try { String formatConfigString = configXstream.toXML(formatConfig); guiPrefs.putAndSave(ExportOptionsController.class, QTI_EXPORT_ITEM_FORMAT_CONFIG, formatConfigString); } catch (Exception e) { log.error("",e); } } }} |