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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.core.commons.services.license.manager;
import org.olat.core.commons.services.license.License;
import org.olat.core.commons.services.license.model.LicenseImpl;
import org.olat.core.commons.services.license.model.LicenseTypeImpl;
import org.olat.core.commons.services.license.model.ResourceLicenseImpl;
import org.apache.logging.log4j.Logger;
import org.olat.core.logging.Tracing;
import org.olat.core.util.StringHelper;
import org.olat.core.util.xml.XStreamHelper;
import org.springframework.stereotype.Component;
import com.thoughtworks.xstream.XStream;
/**
*
* Initial date: 16.03.2018<br>
* @author uhensler, [email protected], http://www.frentix.com
*
*/
@Component
class LicenseXStreamHelper {
private static final Logger log = Tracing.createLoggerFor(LicenseXStreamHelper.class);
private static final XStream licenseXStream = XStreamHelper.createXStreamInstanceForDBObjects();
static {
// BUG: CWE-91 XML Injection (aka Blind XPath Injection)
//
// FIXED:
XStreamHelper.allowDefaultPackage(licenseXStream);
licenseXStream.alias("license", LicenseImpl.class);
licenseXStream.alias("license", ResourceLicenseImpl.class);
licenseXStream.alias("licenseType", LicenseTypeImpl.class);
licenseXStream.ignoreUnknownElements();
licenseXStream.omitField(LicenseImpl.class, "creationDate");
licenseXStream.omitField(LicenseImpl.class, "lastModified");
licenseXStream.omitField(ResourceLicenseImpl.class, "creationDate");
licenseXStream.omitField(ResourceLicenseImpl.class, "lastModified");
licenseXStream.omitField(LicenseTypeImpl.class, "creationDate");
licenseXStream.omitField(LicenseTypeImpl.class, "lastModified");
}
String toXml(License license) {
if (license == null) return null;
return licenseXStream.toXML(license);
}
License licenseFromXml(String xml) {
License license = null;
if(StringHelper.containsNonWhitespace(xml)) {
try {
Object obj = licenseXStream.fromXML(xml);
if(obj instanceof License) {
license = (License) obj;
}
} catch (Exception e) {
log.error("", e);
}
}
return license;
}
}
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