/**
* 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.cades.validation;
import java.security.cert.CRLException;
import java.security.cert.X509CRL;
import java.util.ArrayList;
import java.util.Collection;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.cms.Attribute;
import org.bouncycastle.asn1.cms.AttributeTable;
import org.bouncycastle.asn1.esf.RevocationValues;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.CertificateList;
import org.bouncycastle.cert.X509CRLHolder;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.SignerInformation;
import org.bouncycastle.jce.provider.X509CRLObject;
import org.bouncycastle.util.Store;
import eu.europa.esig.dss.DSSException;
import eu.europa.esig.dss.DSSUtils;
import eu.europa.esig.dss.x509.crl.OfflineCRLSource;
/**
* CRLSource that retrieves information from a CAdES signature.
*
*
*/
public class CAdESCRLSource extends OfflineCRLSource {
private final CMSSignedData cmsSignedData;
private final SignerInformation signerInformation;
/**
* The default constructor for CAdESCRLSource.
*
* @param signerInformation
*/
public CAdESCRLSource(final CMSSignedData cmsSignedData, final SignerInformation signerInformation) {
this.cmsSignedData = cmsSignedData;
this.signerInformation = signerInformation;
extract();
}
private void extract() {
x509CRLList = new ArrayList<X509CRL>();
// Adds CRLs contained in SignedData
final Store<X509CRLHolder> crLs = cmsSignedData.getCRLs();
final Collection<X509CRLHolder> collection = crLs.getMatches(null);
for (final X509CRLHolder x509CRLHolder : collection) {
final X509CRL x509CRL = DSSUtils.toX509CRL(x509CRLHolder);
addCRLToken(x509CRL);
}
// Adds CRLs in -XL ... inside SignerInfo attribute if present
if (signerInformation != null) {
final AttributeTable attributes = signerInformation.getUnsignedAttributes();
if (attributes != null) {
/*
ETSI TS 101 733 V2.2.1 (2013-04) page 43
6.3.4 revocation-values Attribute Definition
This attribute is used to contain the revocation information required for the following forms of extended electronic
signature: CAdES-X Long, ES X-Long Type 1, and CAdES-X Long Type 2, see clause B.1.1 for an illustration of
this form of electronic signature.
The revocation-values attribute is an unsigned attribute. Only a single instance of this attribute shall occur with
an electronic signature. It holds the values of CRLs and OCSP referenced in the
complete-revocation-references attribute.
RevocationValues ::= SEQUENCE {
crlVals [0] SEQUENCE OF CertificateList OPTIONAL,
ocspVals [1] SEQUENCE OF BasicOCSPResponse OPTIONAL,
otherRevVals [2] OtherRevVals OPTIONAL}
*/
final Attribute attribute = attributes.get(PKCSObjectIdentifiers.id_aa_ets_revocationValues);
if (attribute != null) {
final ASN1Set attrValues = attribute.getAttrValues();
final ASN1Encodable attValue = attrValues.getObjectAt(0);
final RevocationValues revValues = RevocationValues.getInstance(attValue);
for (final CertificateList revValue : revValues.getCrlVals()) {
addCRLToken(revValue);
}
}
}
/* TODO (pades): Read revocation data from from unsigned attribute 1.2.840.113583.1.1.8
In the PKCS #7 object of a digital signature in a PDF file, identifies a signed attribute
that "can include all the revocation information that is necessary to carry out revocation
checks for the signer's certificate and its issuer certificates."
Defined as adbe-revocationInfoArchival { adbe(1.2.840.113583) acrobat(1) security(1) 8 } in "PDF Reference, fifth edition: Adobe® Portable Document Format, Version 1.6" Adobe Systems Incorporated, 2004.
http://partners.adobe.com/public/developer/en/pdf/PDFReference16.pdf page 698
RevocationInfoArchival ::= SEQUENCE {
crl [0] EXPLICIT SEQUENCE of CRLs, OPTIONAL
ocsp [1] EXPLICIT SEQUENCE of OCSP Responses, OPTIONAL
otherRevInfo [2] EXPLICIT SEQUENCE of OtherRevInfo, OPTIONAL
}
OtherRevInfo ::= SEQUENCE {
Type OBJECT IDENTIFIER
Value OCTET STRING
}
*/
// TODO: (Bob: 2013 Dec 03) --> NICOLAS: Is there any other container within the CAdES signature with revocation data? (ie: timestamp)
}
}
private void addCRLToken(final X509CRL x509CRL) {
if (!x509CRLList.contains(x509CRL)) {
x509CRLList.add(x509CRL);
}
}
private void addCRLToken(final CertificateList certificateList) {
final X509CRLObject x509CRLObject = getX509CRLObject(certificateList);
if (!x509CRLList.contains(x509CRLObject)) {
x509CRLList.add(x509CRLObject);
}
}
private static X509CRLObject getX509CRLObject(final CertificateList certificateList) throws DSSException {
try {
return new X509CRLObject(certificateList);
} catch (CRLException e) {
throw new DSSException(e);
}
}
}