/*******************************************************************************
* Copyright 2014 by E-Government Innovation Center EGIZ, Graz, Austria
* PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
* joint initiative of the Federal Chancellery Austria and Graz University of
* Technology.
*
* Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
* the European Commission - subsequent versions of the EUPL (the "Licence");
* You may not use this work except in compliance with the Licence.
* You may obtain a copy of the Licence at:
* http://www.osor.eu/eupl/
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the Licence is distributed on an "AS IS" basis,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Licence for the specific language governing permissions and
* limitations under the Licence.
*
* This product combines work with different licenses. See the "NOTICE" text
* file for details on the various modules and licenses.
* The "NOTICE" text file is part of the distribution. Any derivative works
* that you distribute must include a readable copy of the "NOTICE" text file.
******************************************************************************/
package at.gv.egiz.pdfas.lib.impl.verify;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
import at.gv.egiz.pdfas.common.settings.ISettings;
import at.gv.egiz.pdfas.lib.api.Configuration;
import at.gv.egiz.pdfas.lib.api.verify.VerifyParameter.SignatureVerificationLevel;
public class VerifierDispatcher {
private static final Logger logger = LoggerFactory
.getLogger(VerifierDispatcher.class);
public static final String[] defaultClasses = new String[] {
"at.gv.egiz.pdfas.sigs.pkcs7detached.PKCS7DetachedVerifier",
"at.gv.egiz.pdfas.sigs.pades.PAdESVerifier" };
public static final String CONF_VERIFIER_LIST = "verifier.classes";
public static final String CONF_VERIFIER_SEP = ";";
public static final String CONF_VERIFIER = "default.verifier";
public Map> filterMap = new HashMap>();
private String[] getClasses(ISettings settings) {
String confVerifiers = settings.getValue(CONF_VERIFIER_LIST);
String[] classes;
if (confVerifiers != null) {
classes = confVerifiers.split(CONF_VERIFIER_SEP);
} else {
classes = defaultClasses;
}
List filteredClasses = new ArrayList();
for (int i = 0; i < classes.length; i++) {
String clsName = classes[i];
try {
Class> cls = Class.forName(clsName);
filteredClasses.add(clsName);
} catch (Throwable e) {
logger.error("Cannot find Verifier class: " + clsName, e);
}
}
String[] clsNames = new String[filteredClasses.size()];
for (int i = 0; i < filteredClasses.size(); i++) {
clsNames[i] = filteredClasses.get(i);
}
dumpVerifierClasses(clsNames);
return clsNames;
}
private void dumpVerifierClasses(String[] clsNames) {
for (int i = 0; i < clsNames.length; i++) {
String clsName = clsNames[i];
logger.debug("Registering Signature Verifier: " + clsName);
}
}
public VerifierDispatcher(ISettings settings) {
// TODO: add configuration parameter to set verifier
// Map verifierClasses = settings
// .getValuesPrefix(CONF_VERIFIER);
String[] currentClasses = null;
// if (verifierClasses == null || verifierClasses.isEmpty()) {
logger.info("Getting Verifier classes");
currentClasses = getClasses(settings);
/*
* } else { currentClasses = new
* String[verifierClasses.values().size()]; Iterator classIt =
* verifierClasses.values().iterator(); int j = 0; while
* (classIt.hasNext()) { currentClasses[j] = classIt.next(); j++; } }
*/
try {
for (int i = 0; i < currentClasses.length; i++) {
String clsName = currentClasses[i];
Class> cls = Class.forName(clsName);
Object f = cls.newInstance();
if (!(f instanceof IVerifyFilter))
throw new ClassCastException();
IVerifyFilter filter = (IVerifyFilter) f;
filter.setConfiguration((Configuration) settings);
List entries = filter.getFiters();
Iterator it = entries.iterator();
while (it.hasNext()) {
FilterEntry entry = it.next();
HashMap filters = filterMap
.get(entry.getFilter().getName());
if (filters == null) {
filters = new HashMap();
filterMap.put(entry.getFilter().getName(), filters);
}
IVerifyFilter oldFilter = filters.get(entry.getSubFilter()
.getName());
if (oldFilter != null) {
throw new PdfAsException("Filter allready registered");
}
filters.put(entry.getSubFilter().getName(), filter);
logger.debug("Registered Filter: " + cls.getName()
+ " for " + entry.getFilter().getName() + "/"
+ entry.getSubFilter().getName());
}
}
} catch (Throwable e) {
e.printStackTrace();
}
}
public IVerifyFilter getVerifier(String filter, String subfilter) {
HashMap filters = filterMap.get(filter);
if (filters == null) {
return null;
}
return filters.get(subfilter);
}
public IVerifier getVerifierByLevel(SignatureVerificationLevel level) {
switch (level) {
case INTEGRITY_ONLY_VERIFICATION:
return new IntegrityVerifier();
default:
return new FullVerifier();
}
}
}