eu.europa.esig.dss.crl.AbstractCRLUtils Maven / Gradle / Ivy
/**
* DSS - Digital Signature Services
* Copyright (C) 2015 European Commission, provided under the CEF programme
*
* This file is part of the "DSS - Digital Signature Services" project.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package eu.europa.esig.dss.crl;
import eu.europa.esig.dss.model.DSSException;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1String;
import org.bouncycastle.asn1.BERTags;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.DistributionPointName;
import org.bouncycastle.asn1.x509.GeneralName;
import org.bouncycastle.asn1.x509.GeneralNames;
import org.bouncycastle.asn1.x509.IssuingDistributionPoint;
import org.bouncycastle.asn1.x509.Time;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The abstract class containing common code for CRL parsing
*/
public abstract class AbstractCRLUtils {
private static final Logger LOG = LoggerFactory.getLogger(AbstractCRLUtils.class);
/**
* Default constructor
*/
protected AbstractCRLUtils() {
// empty
}
/**
* Builds the {@code CRLBinary} object
*
* @param binaries byte array representing the CRL (DER or PEM encoded)
* @return {@link CRLBinary}
*/
public CRLBinary buildCRLBinary(byte[] binaries) {
return new CRLBinary(getDERContent(binaries));
}
private byte[] getDERContent(byte[] binaries) {
if (binaries != null && binaries.length > 0) {
byte first = binaries[0];
if (isDerEncoded(first)) {
return binaries;
} else if (isPemEncoded(first)) {
return PemToDerConverter.convert(binaries);
} else {
throw new DSSException("Unable to load CRL. Not possible to convert to DER!");
}
}
throw new DSSException("Unsupported CRL. The obtained CRL content is empty!");
}
private boolean isDerEncoded(byte first) {
return (BERTags.SEQUENCE | BERTags.CONSTRUCTED) == first;
}
private boolean isPemEncoded(byte first) {
return '-' == first;
}
/**
* Parses and sets the 'expiredCertsOnCRL' value
*
* @param validity {@link CRLValidity} to set the value to
* @param expiredCertsOnCRLBinaries the 'expiredCertsOnCRL' value
*/
protected void extractExpiredCertsOnCRL(CRLValidity validity, byte[] expiredCertsOnCRLBinaries) {
if (expiredCertsOnCRLBinaries != null) {
try {
ASN1OctetString octetString = (ASN1OctetString) ASN1Primitive.fromByteArray(expiredCertsOnCRLBinaries);
Time time = Time.getInstance(ASN1Primitive.fromByteArray(octetString.getOctets()));
if (time != null && time.toASN1Primitive() instanceof ASN1GeneralizedTime) {
validity.setExpiredCertsOnCRL(time.getDate());
} else {
LOG.warn("Attribute 'expiredCertsOnCRL' found but ignored (should be encoded as ASN.1 GeneralizedTime)");
}
} catch (Exception e) {
LOG.warn("Unable to parse expiredCertsOnCRL on CRL : {}", e.getMessage(), e);
}
}
}
/**
* Parses and sets the issuing distribution point binaries
*
* @param validity {@link CRLValidity} to set the value to
* @param issuingDistributionPointBinary the issuing distribution point binaries
*/
protected void extractIssuingDistributionPointBinary(CRLValidity validity, byte[] issuingDistributionPointBinary) {
if (issuingDistributionPointBinary != null) {
IssuingDistributionPoint issuingDistributionPoint = IssuingDistributionPoint
.getInstance(ASN1OctetString.getInstance(issuingDistributionPointBinary).getOctets());
validity.setOnlyAttributeCerts(issuingDistributionPoint.onlyContainsAttributeCerts());
validity.setOnlyCaCerts(issuingDistributionPoint.onlyContainsCACerts());
validity.setOnlyUserCerts(issuingDistributionPoint.onlyContainsUserCerts());
validity.setIndirectCrl(issuingDistributionPoint.isIndirectCRL());
validity.setReasonFlags(issuingDistributionPoint.getOnlySomeReasons());
validity.setUrl(getUrl(issuingDistributionPoint.getDistributionPoint()));
} else {
LOG.debug("issuingDistributionPointBinary is null. Issuing Distribution Point fields in CRLValidity cannot be filled.");
}
}
private String getUrl(DistributionPointName distributionPoint) {
if ((distributionPoint != null) && (DistributionPointName.FULL_NAME == distributionPoint.getType())) {
final GeneralNames generalNames = (GeneralNames) distributionPoint.getName();
if ((generalNames != null) && (generalNames.getNames() != null && generalNames.getNames().length > 0)) {
for (GeneralName generalName : generalNames.getNames()) {
if (GeneralName.uniformResourceIdentifier == generalName.getTagNo()) {
ASN1String str = (ASN1String) ((DERTaggedObject) generalName.toASN1Primitive()).getBaseObject();
return str.getString();
}
}
}
}
return null;
}
}