// controlla che nel firmatario sia presente l'attributo ESSCertIDv2 e che esso sia valido
// in questo caso la busta crittografica è espressa correttamente nel formato CADES-BES secondo
// la DELIBERAZIONE ministeriale del N . 45 DEL 21 MAGGIO 2009
private boolean isLegallySigned(SignerInformation signer, X509CertificateHolder cert)
throws FirmapiuException, NoSuchAlgorithmException, IOException {
AttributeTable signAttr = signer.getSignedAttributes();
if (signAttr == null) throw new FirmapiuException(VERIFY_SIGNER_SIGNINGATTRIBUTE_NOTFOUND);
Attribute attr = signAttr.get(PKCSObjectIdentifiers.id_aa_signingCertificateV2);
if (attr == null) throw new FirmapiuException(VERIFY_SIGNER_SIGNINGATTRIBUTE_NOTFOUND);
ASN1Sequence sequence = ASN1Sequence.getInstance(attr.getAttrValues().getObjectAt(0));
SigningCertificateV2 scv2 = SigningCertificateV2.getInstance(sequence);
ESSCertIDv2[] essCert = scv2.getCerts();
if (essCert == null || essCert.length < 1)
throw new FirmapiuException(VERIFY_SIGNER_SIGNINGATTRIBUTE_NOTFOUND);
// controlla l'hash del certificato se si restituisce true se no restituisce no
// aggiungere hash del certificato di sottoscrizione
String digestAlgorithm = "SHA-256";
MessageDigest sha = null;
sha = MessageDigest.getInstance(digestAlgorithm);
byte[] digestedCert = sha.digest(cert.getEncoded());
byte[] essCertHash = essCert[0].getCertHash();
// affinché la firma sia valida digestCert e essCertHash devono essere uguali
if (digestedCert.length != essCertHash.length) return false;
else {
for (int i = 0; i < digestedCert.length; i++)
if (digestedCert[i] != essCertHash[i]) {
return false;
}
return true;
} // fine if
} // fine metodo
/**
* This method returns DER encoded array of bytes representing {@code X509Certificate} for given
* {@code X509CertificateHolder}. The {@code IOException} is transformed in {@code DSSException}.
*
* @param certificateHolder {@code X509CertificateHolder}
* @return DER encoded array of bytes representing {@code X509Certificate}.
* @throws DSSException
*/
public static byte[] getCertificateDEREncoded(final X509CertificateHolder certificateHolder)
throws DSSException {
try {
final byte[] bytes = certificateHolder.getEncoded();
return bytes;
} catch (IOException e) {
throw new DSSException(e);
}
}
public Certificate getSignerCertificate() {
try {
Collection certificateCollection =
cmsSignedData.getCertificates().getMatches(firstSignerInfo.getSID());
Iterator iterator = certificateCollection.iterator();
X509CertificateHolder certHolder = (X509CertificateHolder) iterator.next();
return CertificateFactory.getInstance("X.509", BouncyCastleProvider.PROVIDER_NAME)
.generateCertificate(new ByteArrayInputStream(certHolder.getEncoded()));
} catch (Exception e) {
log.error(Channel.TECH, "Could not extract signer certificate from CMS signature : %1$s", e);
}
return null;
}
public X509Certificate convertCertificate(X509CertificateHolder certHolder)
throws CertificateException {
try {
CertificateFactory certFact = helper.createCertificateFactory("X.509");
return (X509Certificate)
certFact.generateCertificate(new ByteArrayInputStream(certHolder.getEncoded()));
} catch (IOException e) {
throw new OpCertificateException(
"cannot get encoded form of certificate: " + e.getMessage(), e);
} catch (NoSuchAlgorithmException e) {
throw new OpCertificateException("cannot create certificate factory: " + e.getMessage(), e);
} catch (NoSuchProviderException e) {
throw new OpCertificateException("cannot find factory provider: " + e.getMessage(), e);
}
}
public List<Certificate> getSignatureCertificateInfo() {
try {
Store certificateStore = cmsSignedData.getCertificates();
Collection<X509CertificateHolder> certificateCollection = certificateStore.getMatches(null);
List<Certificate> x509CertsCollection =
new ArrayList<Certificate>(certificateCollection.size());
for (X509CertificateHolder certHolder : certificateCollection) {
x509CertsCollection.add(
CertificateFactory.getInstance("X.509", BouncyCastleProvider.PROVIDER_NAME)
.generateCertificate(new ByteArrayInputStream(certHolder.getEncoded())));
}
return x509CertsCollection;
} catch (Exception e) {
ExceptionHandlerTyped.<SPISignatureException>handle(SPISignatureException.class, e);
}
return null;
}
/**
* Basic Constructor - set up a calculator based on signerInfoGen with a ESSCertID calculated from
* the signer's associated certificate using the sha1DigestCalculator. If alternate values are
* required for id-aa-signingCertificate they should be added to the signerInfoGen object before
* it is passed in, otherwise a standard digest based value will be added.
*
* @param signerInfoGen the generator for the signer we are using.
* @param digestCalculator calculator for to use for digest of certificate.
* @param tsaPolicy tasPolicy to send.
* @param isIssuerSerialIncluded should issuerSerial be included in the ESSCertIDs, true if yes,
* by default false.
* @throws IllegalArgumentException if calculator is not SHA-1 or there is no associated
* certificate for the signer,
* @throws TSPException if the signer certificate cannot be processed.
*/
public TimeStampTokenGenerator(
final SignerInfoGenerator signerInfoGen,
DigestCalculator digestCalculator,
ASN1ObjectIdentifier tsaPolicy,
boolean isIssuerSerialIncluded)
throws IllegalArgumentException, TSPException {
this.signerInfoGen = signerInfoGen;
this.tsaPolicyOID = tsaPolicy;
if (!signerInfoGen.hasAssociatedCertificate()) {
throw new IllegalArgumentException("SignerInfoGenerator must have an associated certificate");
}
X509CertificateHolder assocCert = signerInfoGen.getAssociatedCertificate();
TSPUtil.validateCertificate(assocCert);
try {
OutputStream dOut = digestCalculator.getOutputStream();
dOut.write(assocCert.getEncoded());
dOut.close();
if (digestCalculator
.getAlgorithmIdentifier()
.getAlgorithm()
.equals(OIWObjectIdentifiers.idSHA1)) {
final ESSCertID essCertid =
new ESSCertID(
digestCalculator.getDigest(),
isIssuerSerialIncluded
? new IssuerSerial(
new GeneralNames(new GeneralName(assocCert.getIssuer())),
assocCert.getSerialNumber())
: null);
this.signerInfoGen =
new SignerInfoGenerator(
signerInfoGen,
new CMSAttributeTableGenerator() {
public AttributeTable getAttributes(Map parameters)
throws CMSAttributeTableGenerationException {
AttributeTable table =
signerInfoGen.getSignedAttributeTableGenerator().getAttributes(parameters);
if (table.get(PKCSObjectIdentifiers.id_aa_signingCertificate) == null) {
return table.add(
PKCSObjectIdentifiers.id_aa_signingCertificate,
new SigningCertificate(essCertid));
}
return table;
}
},
signerInfoGen.getUnsignedAttributeTableGenerator());
} else {
AlgorithmIdentifier digAlgID =
new AlgorithmIdentifier(digestCalculator.getAlgorithmIdentifier().getAlgorithm());
final ESSCertIDv2 essCertid =
new ESSCertIDv2(
digAlgID,
digestCalculator.getDigest(),
isIssuerSerialIncluded
? new IssuerSerial(
new GeneralNames(new GeneralName(assocCert.getIssuer())),
new ASN1Integer(assocCert.getSerialNumber()))
: null);
this.signerInfoGen =
new SignerInfoGenerator(
signerInfoGen,
new CMSAttributeTableGenerator() {
public AttributeTable getAttributes(Map parameters)
throws CMSAttributeTableGenerationException {
AttributeTable table =
signerInfoGen.getSignedAttributeTableGenerator().getAttributes(parameters);
if (table.get(PKCSObjectIdentifiers.id_aa_signingCertificateV2) == null) {
return table.add(
PKCSObjectIdentifiers.id_aa_signingCertificateV2,
new SigningCertificateV2(essCertid));
}
return table;
}
},
signerInfoGen.getUnsignedAttributeTableGenerator());
}
} catch (IOException e) {
throw new TSPException("Exception processing certificate.", e);
}
}
