/*
*
* Copyright (c) 2013 - 2017 Lijun Liao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
*
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the XiPKI software without
* disclosing the source code of your own applications.
*
* For more information, please contact Lijun Liao at this
* address: lijun.liao@gmail.com
*/
package org.xipki.pki.scep.message;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cms.AttributeTable;
import org.bouncycastle.asn1.cms.CMSAttributes;
import org.bouncycastle.asn1.cms.CMSObjectIdentifiers;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.asn1.cms.SignedData;
import org.bouncycastle.asn1.cms.Time;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.CMSTypedData;
import org.bouncycastle.cms.SignerId;
import org.bouncycastle.cms.SignerInformation;
import org.bouncycastle.cms.SignerInformationStore;
import org.bouncycastle.cms.SignerInformationVerifier;
import org.bouncycastle.cms.jcajce.JcaSimpleSignerInfoVerifierBuilder;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.util.CollectionStore;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xipki.commons.common.util.ParamUtil;
import org.xipki.pki.scep.exception.MessageDecodingException;
import org.xipki.pki.scep.util.ScepUtil;
/**
* @author Lijun Liao
* @since 2.0.0
*/
public class DecodedNextCaMessage {
private static final Logger LOG = LoggerFactory.getLogger(DecodedNextCaMessage.class);
private AuthorityCertStore authorityCertStore;
private X509Certificate signatureCert;
private ASN1ObjectIdentifier digestAlgorithm;
private Boolean signatureValid;
private Date signingTime;
private String failureMessage;
public DecodedNextCaMessage() {
}
public AuthorityCertStore getAuthorityCertStore() {
return authorityCertStore;
}
public void setAuthorityCertStore(final AuthorityCertStore authorityCertStore) {
this.authorityCertStore = authorityCertStore;
}
public X509Certificate getSignatureCert() {
return signatureCert;
}
public void setSignatureCert(final X509Certificate signatureCert) {
this.signatureCert = signatureCert;
}
public void setDigestAlgorithm(final ASN1ObjectIdentifier digestAlgorithm) {
this.digestAlgorithm = digestAlgorithm;
}
public void setSignatureValid(final Boolean signatureValid) {
this.signatureValid = signatureValid;
}
public ASN1ObjectIdentifier getDigestAlgorithm() {
return digestAlgorithm;
}
public String getFailureMessage() {
return failureMessage;
}
public void setFailureMessage(final String failureMessage) {
this.failureMessage = failureMessage;
}
public Boolean isSignatureValid() {
return signatureValid;
}
public Date getSigningTime() {
return signingTime;
}
public void setSigningTime(final Date signingTime) {
this.signingTime = signingTime;
}
@SuppressWarnings("unchecked")
public static DecodedNextCaMessage decode(final CMSSignedData pkiMessage,
final CollectionStore<X509CertificateHolder> certStore)
throws MessageDecodingException {
ParamUtil.requireNonNull("pkiMessage", pkiMessage);
SignerInformationStore signerStore = pkiMessage.getSignerInfos();
Collection<SignerInformation> signerInfos = signerStore.getSigners();
if (signerInfos.size() != 1) {
throw new MessageDecodingException(
"number of signerInfos is not 1, but " + signerInfos.size());
}
SignerInformation signerInfo = signerInfos.iterator().next();
SignerId sid = signerInfo.getSID();
Collection<?> signedDataCerts = null;
if (certStore != null) {
signedDataCerts = certStore.getMatches(sid);
}
if (signedDataCerts == null || signedDataCerts.isEmpty()) {
signedDataCerts = pkiMessage.getCertificates().getMatches(signerInfo.getSID());
}
if (signedDataCerts == null || signedDataCerts.size() != 1) {
throw new MessageDecodingException(
"could not find embedded certificate to verify the signature");
}
AttributeTable signedAttrs = signerInfo.getSignedAttributes();
if (signedAttrs == null) {
throw new MessageDecodingException("missing signed attributes");
}
Date signingTime = null;
// signingTime
ASN1Encodable attrValue = ScepUtil.getFirstAttrValue(signedAttrs,
CMSAttributes.signingTime);
if (attrValue != null) {
signingTime = Time.getInstance(attrValue).getDate();
}
DecodedNextCaMessage ret = new DecodedNextCaMessage();
if (signingTime != null) {
ret.setSigningTime(signingTime);
}
ASN1ObjectIdentifier digestAlgOid = signerInfo.getDigestAlgorithmID().getAlgorithm();
ret.setDigestAlgorithm(digestAlgOid);
String sigAlgOid = signerInfo.getEncryptionAlgOID();
if (!PKCSObjectIdentifiers.rsaEncryption.getId().equals(sigAlgOid)) {
ASN1ObjectIdentifier tmpDigestAlgOid;
try {
tmpDigestAlgOid = ScepUtil.extractDigesetAlgorithmIdentifier(
signerInfo.getEncryptionAlgOID(), signerInfo.getEncryptionAlgParams());
} catch (Exception ex) {
final String msg =
"could not extract digest algorithm from signerInfo.signatureAlgorithm: "
+ ex.getMessage();
LOG.error(msg);
LOG.debug(msg, ex);
ret.setFailureMessage(msg);
return ret;
}
if (!digestAlgOid.equals(tmpDigestAlgOid)) {
ret.setFailureMessage("digestAlgorithm and encryptionAlgorithm do not use"
+ " the same digestAlgorithm");
return ret;
}
} // end if
X509CertificateHolder tmpSignerCert =
(X509CertificateHolder) signedDataCerts.iterator().next();
X509Certificate signerCert;
try {
signerCert = ScepUtil.toX509Cert(tmpSignerCert.toASN1Structure());
} catch (CertificateException ex) {
final String msg = "could not construct X509CertificateObject: " + ex.getMessage();
LOG.error(msg);
LOG.debug(msg, ex);
ret.setFailureMessage(msg);
return ret;
}
ret.setSignatureCert(signerCert);
// validate the signature
SignerInformationVerifier verifier;
try {
verifier = new JcaSimpleSignerInfoVerifierBuilder().build(signerCert.getPublicKey());
} catch (OperatorCreationException ex) {
final String msg = "could not build signature verifier: " + ex.getMessage();
LOG.error(msg);
LOG.debug(msg, ex);
ret.setFailureMessage(msg);
return ret;
}
boolean signatureValid;
try {
signatureValid = signerInfo.verify(verifier);
} catch (CMSException ex) {
final String msg = "could not verify the signature: " + ex.getMessage();
LOG.error(msg);
LOG.debug(msg, ex);
ret.setFailureMessage(msg);
return ret;
}
ret.setSignatureValid(signatureValid);
if (!signatureValid) {
return ret;
}
// MessageData
CMSTypedData signedContent = pkiMessage.getSignedContent();
ASN1ObjectIdentifier signedContentType = signedContent.getContentType();
if (!CMSObjectIdentifiers.signedData.equals(signedContentType)) {
// fall back: some SCEP client use id-data
if (!CMSObjectIdentifiers.data.equals(signedContentType)) {
ret.setFailureMessage("either id-signedData or id-data is excepted, but not '"
+ signedContentType.getId());
return ret;
}
}
ContentInfo contentInfo = ContentInfo.getInstance((byte[]) signedContent.getContent());
SignedData signedData = SignedData.getInstance(contentInfo.getContent());
List<X509Certificate> certs;
try {
certs = ScepUtil.getCertsFromSignedData(signedData);
} catch (CertificateException ex) {
final String msg = "could not extract Certificates from the message: "
+ ex.getMessage();
LOG.error(msg);
LOG.debug(msg, ex);
ret.setFailureMessage(msg);
return ret;
}
final int n = certs.size();
X509Certificate caCert = null;
List<X509Certificate> raCerts = new LinkedList<X509Certificate>();
for (int i = 0; i < n; i++) {
X509Certificate cert = certs.get(i);
if (cert.getBasicConstraints() > -1) {
if (caCert != null) {
final String msg =
"multiple CA certificates is returned, but exactly 1 is expected";
LOG.error(msg);
ret.setFailureMessage(msg);
return ret;
}
caCert = cert;
} else {
raCerts.add(cert);
}
} // end for
if (caCert == null) {
final String msg = "no CA certificate is returned";
LOG.error(msg);
ret.setFailureMessage(msg);
return ret;
}
X509Certificate[] locaRaCerts;
if (raCerts.isEmpty()) {
locaRaCerts = null;
} else {
locaRaCerts = raCerts.toArray(new X509Certificate[0]);
}
AuthorityCertStore authorityCertStore = AuthorityCertStore.getInstance(caCert, locaRaCerts);
ret.setAuthorityCertStore(authorityCertStore);
return ret;
} // method decode
}