I am trying to sign a PDF document with DSS, and my problem is that I cannot calculate the hash of the document in server A and then sign it in server B.
Knowing that server A contains the PDF document and in server B we retrieve the certificate used for signature
My question is how i can compute the hash of the document in a server A without needing the certificate. Then send it for signature in server B ?
UPDATE :
****** Preparation and calculation of hash ********
IPdfObjFactory pdfObjFactory = new ServiceLoaderPdfObjFactory();
PDFSignatureService pdfSignatureService = pdfObjFactory.newPAdESSignatureService();
PAdESSignatureParameters parameters = new PAdESSignatureParameters();
parameters.setDigestAlgorithm(DigestAlgorithm.SHA512);
parameters.setReason("Preuve de signature");
parameters.setLocation("MAROC");
parameters.setGenerateTBSWithoutCertificate(true);
SignatureImageParameters imageParameters = new SignatureImageParameters();
imageParameters.setPage(1);
FileDocument imageFile = new FileDocument("logo.png");
RemoteDocument fileImage = RemoteDocumentConverter.toRemoteDocument(imageFile);
DSSDocument image = RemoteDocumentConverter.toDSSDocument(fileImage);
// set an image
imageParameters.setImage(image);
imageParameters.setxAxis(350);
imageParameters.setyAxis(400);
imageParameters.setWidth(200);
imageParameters.setHeight(100);
parameters.setImageParameters(imageParameters);
SignatureImageTextParameters textParameters = new SignatureImageTextParameters();
DSSFont font = new DSSJavaFont(Font.SERIF);
font.setSize(16); // Specifies the text size value (the default font size is 12pt)
textParameters.setFont(font);
textParameters.setTextColor(Color.BLUE);
textParameters.setSignerTextPosition(SignerTextPosition.RIGHT);
// Specifies a horizontal alignment of a text with respect to its area
textParameters.setSignerTextHorizontalAlignment(SignerTextHorizontalAlignment.LEFT);
// Specifies a vertical alignment of a text block with respect to a signature field area
textParameters.setSignerTextVerticalAlignment(SignerTextVerticalAlignment.TOP);
imageParameters.setTextParameters(textParameters);
FileDocument fileToSign = new FileDocument("file.pdf");
RemoteDocument fileSign = RemoteDocumentConverter.toRemoteDocument(fileToSign);
DSSDocument toSignDocument = RemoteDocumentConverter.toDSSDocument(fileSign);
byte[] hash = pdfSignatureService.digest(toSignDocument, parameters);
DSSDocument signatureValue = SignHashDocument.signHash(hash);
DSSDocument signedDocument = pdfSignatureService.sign(toSignDocument, DSSUtils.toByteArray(signatureValue), parameters);
save(signedDocument);
****** Hash signature ********
// Create common certificate verifier
CommonCertificateVerifier commonCertificateVerifier = new CommonCertificateVerifier();
// Create CAdESService for signature
CAdESService service = new CAdESService(commonCertificateVerifier);
CAdESSignatureParameters parameters = new CAdESSignatureParameters();
DSSPrivateKeyEntry privateKey = getKey("certificate.p12","123456");
// We choose the level of the signature (-B, -T, -LT, -LTA).
parameters.setSignatureLevel(SignatureLevel.CAdES_BASELINE_B);
parameters.setSignaturePackaging(SignaturePackaging.ENVELOPING);
parameters.setDigestAlgorithm(DigestAlgorithm.SHA512);
// We set the signing certificate
parameters.setSigningCertificate(privateKey.getCertificate());
// We set the certificate chain
parameters.setCertificateChain(privateKey.getCertificateChain());
SignatureTokenConnection signingToken = new Pkcs12SignatureToken("certificate.p12",
new KeyStore.PasswordProtection("123456".toCharArray()));
convertByteArrayToFile(hashToSign,"filetosign.hash");
FileDocument fileToSign = new FileDocument("filetosign.hash");
RemoteDocument fileSign = RemoteDocumentConverter.toRemoteDocument(fileToSign);
DSSDocument toSignDocument = RemoteDocumentConverter.toDSSDocument(fileSign);
//ToBeSigned dataToSign = service.getDataToSign(toSignDocument, parameters);
ToBeSigned dataToSign = new ToBeSigned(hashToSign);
DigestAlgorithm digestAlgorithm = parameters.getDigestAlgorithm();
SignatureValue signatureValue = signingToken.sign(dataToSign, digestAlgorithm, privateKey);
DSSDocument signedDocument = service.signDocument(toSignDocument, parameters, signatureValue);
return signedDocument;
******** PDF ERROR : *********
In general
This was written in response to the original revision of your question.
Your code mentions PAdES. Thus, I assume you mean integrated PAdES (not detached CAdES or XAdES) signatures when you say you're trying to sign a PDF document with DSS.
Creating integrated PDF signatures (like PAdES) requires first preparing the PDF to be able to carry an embedded signature, i.e. adding a signature dictionary to an existing or new signature field. This signature dictionary contains multiple information, signing time, signing reason, etc., and also a placeholder for embedding a CMS signature container later. Then this prepared PDF (except the placeholder) is hashed.
Furthermore, your code mentions that you choose the level of the signature (-B, -T, -LT, -LTA).
Creating PAdES Baseline LT and PAdES Baseline LTA signatures requires preparing a PDF with a PAdES Baseline T signature and adding a collection of additional objects, depending on the nature of the T signature.
eSig DSS can do all this preparing for you if it has the PDF to prepare.
So if you only want to send a hash value from server A to B, you have to use eSig DSS on your server A to do most of the work, and server B only serves as a dumb signing service returning a signed hash value or at most a CMS container usable for PAdES.
Whether you can do this without server A knowing about the certificate, depends on whether you want certificate details to appear in a signature widget for the new signature or not. Creating the widget appearance is part of the PDF preparation step, so if you want such a widget with certificate information, server A needs to know the certificate, usually even before requesting the signature!
What kind of protocol you run between server A and B then, is up to you. You merely have to implement SignatureTokenConnection accordingly to use on server A in eSig DSS to communicate with server B.
In case of your approach
After you now showed code from both servers, one can discuss your specific approach.
On server A you use eSig DSS to prepare a PAdES signature and embed a CMS signature container with the SignatureValue your SignHashDocument.signHash call returns:
ToBeSigned dataToSign = service.getDataToSign(toSignDocument, parameters);
SignatureValue signatureValue = SignHashDocument.signHash(dataToSign);
DSSDocument signedDocument = service.signDocument(toSignDocument, parameters, signatureValue);
I.e. server A creates the CMS signature container and server B only supplies the signed hash.
This cannot work unless you know the certificate used for signing and set it in the parameters before the service.getDataToSign call.
The reason is that the CMS container contains references to that certificate in both the unsigned bytes and (for PAdES) the signed bytes of the container. For the reference in the unsigned bytes it theoretically would suffice to retrieve the certificate together with the signature bytes, but for the reference in the signed bytes it has to be known beforehand.
Alternatively you can try to implement the full generation of the CMS container on server B.
This requires considerable changes, though, and you have to dive quite a bit deeper into the PAdESService sources. Instead of the three lines quoted above on server A you have to:
first retrieve a PDF object library and PDF signature service
IPdfObjFactory pdfObjFactory = new ServiceLoaderPdfObjFactory();
PDFSignatureService pdfSignatureService = pdfObjFactory.newPAdESSignatureService();
prepare the PDF a first time for signing and calculate the document digest,
byte[] hash = pdfSignatureService.digest(toSignDocument, parameters);
send this document digest to the backend (server B) which must create and return a special CAdES signature container, not merely naked signature bytes,
and prepare the PDF a second time for signing and inject this signature container:
DSSDocument signature = pdfSignatureService.sign(toSignDocument, encodedData, parameters);
A proof of concept
Here a proof of concept using eSig DSS 5.8:
On your server A we can essentially use your existing code:
DSSDocument toSignDocument = PDF_DOCUMENT_TO_SIGN;
DSSDocument image = IMAGE_DOCUMENT;
PAdESSignatureParameters parameters = new PAdESSignatureParameters();
parameters.setDigestAlgorithm(DigestAlgorithm.SHA512);
parameters.setReason("Preuve de signature");
parameters.setLocation("MAROC");
parameters.setGenerateTBSWithoutCertificate(true);
SignatureImageParameters imageParameters = new SignatureImageParameters();
imageParameters.setPage(1);
imageParameters.setImage(image);
imageParameters.setxAxis(350);
imageParameters.setyAxis(400);
imageParameters.setWidth(200);
imageParameters.setHeight(100);
parameters.setImageParameters(imageParameters);
SignatureImageTextParameters textParameters = new SignatureImageTextParameters();
DSSFont font = new DSSJavaFont(Font.SERIF);
font.setSize(16);
textParameters.setFont(font);
textParameters.setTextColor(Color.BLUE);
textParameters.setSignerTextPosition(SignerTextPosition.RIGHT);
textParameters.setSignerTextHorizontalAlignment(SignerTextHorizontalAlignment.LEFT);
textParameters.setSignerTextVerticalAlignment(SignerTextVerticalAlignment.TOP);
textParameters.setText("TESTING");
imageParameters.setTextParameters(textParameters);
IPdfObjFactory pdfObjFactory = new ServiceLoaderPdfObjFactory();
PDFSignatureService pdfSignatureService = pdfObjFactory.newPAdESSignatureService();
byte[] hash = pdfSignatureService.digest(toSignDocument, parameters);
byte[] signatureValue = signHash(hash);
DSSDocument signedDocument = pdfSignatureService.sign(toSignDocument, signatureValue, parameters);
signedDocument.save(PATH_TO_SAVE_THE_SIGNED_DOCUMENT_TO);
(SplitPAdESSigning test testSplitPAdESGenerationForMehdi)
The method signHash now shall independently create a CMS signature container for the given document hash, and this container shall conform to PAdES requirements. eSig DSS contains methods and classes providing this functionality but they protected or even less visible. Thus, for our POC we simply copy them into our code.
For simplicity I use hard coded SHA512withRSA as signing algorithm.
Thus:
byte[] signHash(byte[] hash) throws IOException {
Pkcs12SignatureToken signingToken = new Pkcs12SignatureToken(YOUR_P12_DATA);
DSSPrivateKeyEntry privateKey = signingToken.getKey(YOUR_ALIAS);
CommonCertificateVerifier commonCertificateVerifier = new CommonCertificateVerifier();
padesCMSSignedDataBuilder = new PadesCMSSignedDataBuilder(commonCertificateVerifier);
PAdESSignatureParameters parameters = new PAdESSignatureParameters();
parameters.setDigestAlgorithm(DigestAlgorithm.SHA512);
parameters.setEncryptionAlgorithm(EncryptionAlgorithm.RSA);
parameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_B);
parameters.setSigningCertificate(privateKey.getCertificate());
ToBeSigned dataToSign = getDataToSign(hash, parameters);
SignatureValue signatureValue = signingToken.sign(dataToSign, DigestAlgorithm.SHA512, privateKey);
return generateCMSSignedData(hash, parameters, signatureValue);
}
PadesCMSSignedDataBuilder padesCMSSignedDataBuilder;
(SplitPAdESSigning method)
The helper methods getDataToSign and generateCMSSignedData are essentially copied from PAdESService; they use the padesCMSSignedDataBuilder provided by signHash (instead of a member variable you can also make it another argument of these two methods):
/** #see eu.europa.esig.dss.pades.signature.PAdESService#getDataToSign(DSSDocument, PAdESSignatureParameters) */
public ToBeSigned getDataToSign(byte[] messageDigest, final PAdESSignatureParameters parameters) throws DSSException {
final SignatureAlgorithm signatureAlgorithm = parameters.getSignatureAlgorithm();
final CustomContentSigner customContentSigner = new CustomContentSigner(signatureAlgorithm.getJCEId());
SignerInfoGeneratorBuilder signerInfoGeneratorBuilder = padesCMSSignedDataBuilder.getSignerInfoGeneratorBuilder(parameters, messageDigest);
final CMSSignedDataGenerator generator = padesCMSSignedDataBuilder.createCMSSignedDataGenerator(parameters, customContentSigner,
signerInfoGeneratorBuilder, null);
final CMSProcessableByteArray content = new CMSProcessableByteArray(messageDigest);
CMSUtils.generateDetachedCMSSignedData(generator, content);
final byte[] dataToSign = customContentSigner.getOutputStream().toByteArray();
return new ToBeSigned(dataToSign);
}
/** #see eu.europa.esig.dss.pades.signature.PAdESService#generateCMSSignedData(DSSDocument, PAdESSignatureParameters, SignatureValue) */
protected byte[] generateCMSSignedData(byte[] messageDigest, final PAdESSignatureParameters parameters,
final SignatureValue signatureValue) {
final SignatureAlgorithm signatureAlgorithm = parameters.getSignatureAlgorithm();
final SignatureLevel signatureLevel = parameters.getSignatureLevel();
Objects.requireNonNull(signatureAlgorithm, "SignatureAlgorithm cannot be null!");
Objects.requireNonNull(signatureLevel, "SignatureLevel must be defined!");
final CustomContentSigner customContentSigner = new CustomContentSigner(signatureAlgorithm.getJCEId(), signatureValue.getValue());
final SignerInfoGeneratorBuilder signerInfoGeneratorBuilder = padesCMSSignedDataBuilder.getSignerInfoGeneratorBuilder(parameters, messageDigest);
final CMSSignedDataGenerator generator = padesCMSSignedDataBuilder.createCMSSignedDataGenerator(parameters, customContentSigner,
signerInfoGeneratorBuilder, null);
final CMSProcessableByteArray content = new CMSProcessableByteArray(messageDigest);
CMSSignedData data = CMSUtils.generateDetachedCMSSignedData(generator, content);
return DSSASN1Utils.getDEREncoded(data);
}
(SplitPAdESSigning methods)
The classes PadesCMSSignedDataBuilder and PAdESLevelBaselineB due to restricted visibility are copied along:
/** #see eu.europa.esig.dss.cades.signature.CMSSignedDataBuilder */
class PadesCMSSignedDataBuilder extends CMSSignedDataBuilder {
public PadesCMSSignedDataBuilder(CertificateVerifier certificateVerifier) {
super(certificateVerifier);
}
#Override
protected CMSSignedDataGenerator createCMSSignedDataGenerator(CAdESSignatureParameters parameters, ContentSigner contentSigner, SignerInfoGeneratorBuilder signerInfoGeneratorBuilder,
CMSSignedData originalSignedData) throws DSSException {
return super.createCMSSignedDataGenerator(parameters, contentSigner, signerInfoGeneratorBuilder, originalSignedData);
}
protected SignerInfoGeneratorBuilder getSignerInfoGeneratorBuilder(final PAdESSignatureParameters parameters, final byte[] messageDigest) {
final CAdESLevelBaselineB cadesLevelBaselineB = new CAdESLevelBaselineB(true);
final PAdESLevelBaselineB padesProfileB = new PAdESLevelBaselineB();
final DigestCalculatorProvider digestCalculatorProvider = new BcDigestCalculatorProvider();
SignerInfoGeneratorBuilder signerInfoGeneratorBuilder = new SignerInfoGeneratorBuilder(digestCalculatorProvider);
signerInfoGeneratorBuilder = signerInfoGeneratorBuilder.setSignedAttributeGenerator(new CMSAttributeTableGenerator() {
#Override
public AttributeTable getAttributes(#SuppressWarnings("rawtypes") Map params) throws CMSAttributeTableGenerationException {
return padesProfileB.getSignedAttributes(params, cadesLevelBaselineB, parameters, messageDigest);
}
});
signerInfoGeneratorBuilder = signerInfoGeneratorBuilder.setUnsignedAttributeGenerator(new CMSAttributeTableGenerator() {
#Override
public AttributeTable getAttributes(#SuppressWarnings("rawtypes") Map params) throws CMSAttributeTableGenerationException {
return padesProfileB.getUnsignedAttributes();
}
});
return signerInfoGeneratorBuilder;
}
}
/** #see eu.europa.esig.dss.pades.signature.PAdESLevelBaselineB */
class PAdESLevelBaselineB {
AttributeTable getSignedAttributes(#SuppressWarnings("rawtypes") Map params,
CAdESLevelBaselineB cadesProfile, PAdESSignatureParameters parameters, byte[] messageDigest) {
AttributeTable signedAttributes = cadesProfile.getSignedAttributes(parameters);
if (signedAttributes.get(CMSAttributes.contentType) == null) {
ASN1ObjectIdentifier contentType = (ASN1ObjectIdentifier) params.get(CMSAttributeTableGenerator.CONTENT_TYPE);
if (contentType != null) {
signedAttributes = signedAttributes.add(CMSAttributes.contentType, contentType);
}
}
if (signedAttributes.get(CMSAttributes.messageDigest) == null) {
signedAttributes = signedAttributes.add(CMSAttributes.messageDigest, new DEROctetString(messageDigest));
}
return signedAttributes;
}
AttributeTable getUnsignedAttributes() {
return null;
}
}
(SplitPAdESSigning helper classes)
signHash and its helpers do not depend on the server A code and, therefore, also can be located on server B.
After some research on the github dss esig repository I was able to find a solution that seemed correct :
********************* ON SERVER A **********************
public class ServerA {
private static PAdESSignatureParameters signatureParameters;
private static DSSDocument documentToSign;
public static ExternalCMSPAdESService service;
public static void main(String[] args) throws Exception {
documentToSign = new FileDocument(new File("file.pdf"));
signatureParameters = new PAdESSignatureParameters();
signatureParameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_B);
signatureParameters.setLocation("Luxembourg");
signatureParameters.setReason("DSS testing");
signatureParameters.setContactInfo("Jira");
signatureParameters.setGenerateTBSWithoutCertificate(true);
service = new ExternalCMSPAdESService(getOfflineCertificateVerifier());
byte[] documentDigest = computeDocumentDigest(documentToSign, signatureParameters);
// Embedded CAdES is generated by a third party
byte[] cmsSignedData = ServerB.getSignedCMSignedData(documentDigest);
service.setCmsSignedData(cmsSignedData);
DSSDocument finalDoc = service.signDocument(documentToSign, signatureParameters, null);
save(finalDoc);
}
private static void save(DSSDocument signedDocument) {
try (FileOutputStream fos = new FileOutputStream("DSS.pdf")) {
Utils.copy(signedDocument.openStream(), fos);
} catch (Exception e) {
Alert alert = new Alert(Alert.AlertType.ERROR, "Unable to save file : " + e.getMessage(), ButtonType.CLOSE);
alert.showAndWait();
return;
}
}
public static CertificateVerifier getOfflineCertificateVerifier() {
CertificateVerifier cv = new CommonCertificateVerifier();
cv.setDataLoader(new IgnoreDataLoader());
return cv;
}
protected static byte[] computeDocumentDigest(final DSSDocument toSignDocument, final PAdESSignatureParameters parameters) {
IPdfObjFactory pdfObjFactory = new ServiceLoaderPdfObjFactory();
final PDFSignatureService pdfSignatureService = pdfObjFactory.newPAdESSignatureService();
return pdfSignatureService.digest(toSignDocument, parameters);
}
private static class ExternalCMSPAdESService extends PAdESService {
private static final long serialVersionUID = -2003453716888412577L;
private byte[] cmsSignedData;
public ExternalCMSPAdESService(CertificateVerifier certificateVerifier) {
super(certificateVerifier);
}
#Override
protected byte[] generateCMSSignedData(final DSSDocument toSignDocument, final PAdESSignatureParameters parameters,
final SignatureValue signatureValue) {
if (this.cmsSignedData == null) {
throw new NullPointerException("A CMS signed data must be provided");
}
return this.cmsSignedData;
}
public void setCmsSignedData(final byte[] cmsSignedData) {
this.cmsSignedData = cmsSignedData;
}
}
}
And to be able to sign the calculated hash :
********************* ON SERVER B **********************
public class ServerB {
private static PAdESSignatureParameters signatureParameters;
private static DSSDocument documentToSign;
public static ExternalCMSPAdESService service;
/**
* Computes a CAdES with specific things for PAdES
*/
public static byte[] getSignedCMSignedData(byte[] documentDigest) throws Exception {
signatureParameters = new PAdESSignatureParameters();
signatureParameters.setSigningCertificate(getSigningCert());
signatureParameters.setCertificateChain(getCertificateChain());
signatureParameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_B);
signatureParameters.setLocation("Luxembourg");
signatureParameters.setReason("DSS testing");
signatureParameters.setContactInfo("Jira");
CMSProcessableByteArray content = new CMSProcessableByteArray(documentDigest);
PadesCMSSignedDataBuilder padesCMSSignedDataBuilder = new PadesCMSSignedDataBuilder(getOfflineCertificateVerifier());
SignatureAlgorithm signatureAlgorithm = signatureParameters.getSignatureAlgorithm();
CustomContentSigner customContentSigner = new CustomContentSigner(signatureAlgorithm.getJCEId());
SignerInfoGeneratorBuilder signerInfoGeneratorBuilder = padesCMSSignedDataBuilder.getSignerInfoGeneratorBuilder(signatureParameters, documentDigest);
CMSSignedDataGenerator generator = padesCMSSignedDataBuilder.createCMSSignedDataGenerator(signatureParameters, customContentSigner,
signerInfoGeneratorBuilder, null);
CMSUtils.generateDetachedCMSSignedData(generator, content);
SignatureTokenConnection signingToken = new Pkcs12SignatureToken("certificate.p12",
new KeyStore.PasswordProtection("123456".toCharArray()));
DSSPrivateKeyEntry privateKey = getKey("certificate.p12","123456");
SignatureValue signatureValue = signingToken.sign(new ToBeSigned(customContentSigner.getOutputStream().toByteArray()),
signatureParameters.getDigestAlgorithm(), privateKey);
customContentSigner = new CustomContentSigner(signatureAlgorithm.getJCEId(), signatureValue.getValue());
generator = padesCMSSignedDataBuilder.createCMSSignedDataGenerator(signatureParameters, customContentSigner, signerInfoGeneratorBuilder, null);
CMSSignedData cmsSignedData = CMSUtils.generateDetachedCMSSignedData(generator, content);
return DSSASN1Utils.getDEREncoded(cmsSignedData);
}
public static CertificateVerifier getOfflineCertificateVerifier() {
CertificateVerifier cv = new CommonCertificateVerifier();
cv.setDataLoader(new IgnoreDataLoader());
return cv;
}
public static List<CertificateToken> getCertificateChain() throws Exception {
List<CertificateToken> list = new ArrayList<>();
CertificateToken[] l = getKey("certificate.p12","123456").getCertificateChain();
for (int i = 0; i < l.length; i++) {
list.add(l[i]);
}
return list;
}
public static CertificateToken getSigningCert() throws Exception {
return getKey("certificate.p12","123456").getCertificate();
}
public static DSSPrivateKeyEntry getKey(String certificate, String pin) throws Exception {
try (Pkcs12SignatureToken signatureToken = new Pkcs12SignatureToken("certificate.p12",
new KeyStore.PasswordProtection("123456".toCharArray()))) {
List<DSSPrivateKeyEntry> keys = signatureToken.getKeys();
KSPrivateKeyEntry dssPrivateKeyEntry = (KSPrivateKeyEntry) keys.get(0);
DSSPrivateKeyEntry entry = signatureToken.getKey(dssPrivateKeyEntry.getAlias(),
new KeyStore.PasswordProtection("123456".toCharArray()));
return entry;
}
}
private static class ExternalCMSPAdESService extends PAdESService {
private static final long serialVersionUID = -2003453716888412577L;
private byte[] cmsSignedData;
public ExternalCMSPAdESService(CertificateVerifier certificateVerifier) {
super(certificateVerifier);
}
#Override
protected byte[] generateCMSSignedData(final DSSDocument toSignDocument, final PAdESSignatureParameters parameters,
final SignatureValue signatureValue) {
if (this.cmsSignedData == null) {
throw new NullPointerException("A CMS signed data must be provided");
}
return this.cmsSignedData;
}
public void setCmsSignedData(final byte[] cmsSignedData) {
this.cmsSignedData = cmsSignedData;
}
}
}
It's is possible and one open source full implementation can be seen in here https://github.com/eideasy/eideasy-external-pades-digital-signatures
You need to create PDF in same format as it will be after being signed, remove all signature ByteRange and then calculate hash.
After getting CAdES signature just add this to the ByteRange. This will give you up to baseline-T signature.
For baseline LT you need to add DSS with all the used certificates, OCSP responses and crls as well.
If more questions you can contact me using details in my profile.
Here is the most important part of the full application that will calculate the digest to be signed for you. When calculating digest then the signatureBytes can be new byte[0].
public byte[] signDetached(SignatureParameters parameters, PDDocument document, byte[] signatureBytes, OutputStream out)
throws IOException, NoSuchAlgorithmException {
if (document.getDocumentId() == null) {
document.setDocumentId(parameters.getSignatureTime());
}
PDSignature signature = createSignatureDictionary(parameters);
SignatureOptions options = new SignatureOptions();
// Enough room for signature, timestamp and OCSP for baseline-LT profile.
options.setPreferredSignatureSize(SignatureOptions.DEFAULT_SIGNATURE_SIZE * 2);
document.addSignature(signature, options);
ExternalSigningSupport externalSigning = document.saveIncrementalForExternalSigning(out);
byte[] dataToSign = IOUtils.toByteArray(externalSigning.getContent());
final MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] digestBytes = digest.digest(dataToSign);
if (signatureBytes != null) {
externalSigning.setSignature(signatureBytes);
}
return digestBytes;
}
private PDSignature createSignatureDictionary(final SignatureParameters parameters) {
PDSignature signature = new PDSignature();
signature.setType(COSName.getPDFName("Sig"));
signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE);
signature.setSubFilter(PDSignature.SUBFILTER_ETSI_CADES_DETACHED);
if (notEmpty(parameters.getSignerName())) {
signature.setName(parameters.getSignerName());
}
if (notEmpty(parameters.getContactInfo())) {
signature.setContactInfo(parameters.getContactInfo());
}
if (notEmpty(parameters.getLocation())) {
signature.setLocation(parameters.getLocation());
}
if (notEmpty(parameters.getReason())) {
signature.setReason(parameters.getReason());
}
// the signing date, needed for valid signature
final Calendar cal = Calendar.getInstance();
final Date signingDate = new Date(parameters.getSignatureTime());
cal.setTime(signingDate);
signature.setSignDate(cal);
return signature;
}
An example using IAIK to sign on HSM, and Europa DSS to asssemble PAdES file:
1/ prepare data to be signed using Europa DSS
CertificateFactory fact = CertificateFactory.getInstance("X.509");
X509Certificate cer = null;
try (FileInputStream is = new FileInputStream (certFile);) {
cer = (X509Certificate) fact.generateCertificate(is);
}
CertificateToken certificateToken = new CertificateToken(cer);
CertificateToken[] certificateChain = new CertificateToken[] {
certificateToken
};
PAdESSignatureParameters parameters = buildPAdESSignatureParameters(certificateToken, certificateChain);
public static PAdESSignatureParameters buildPAdESSignatureParameters(
CertificateToken signingCertificate,
final CertificateToken... certificateChain) {
PAdESSignatureParameters parameters = new PAdESSignatureParameters();
// We choose the level of the signature (-B, -T, -LT, -LTA).
// parameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_B);
parameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_T);
// parameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_LT);
// parameters.setSignatureLevel(SignatureLevel.PAdES_BASELINE_LTA);
parameters.setReason("Preuve de signature");
parameters.setLocation("PARIS");
parameters.setSigningCertificate(signingCertificate);
parameters.setCertificateChain(certificateChain);
return parameters;
}
2/ sign with HSM (Bull Proteccio for example) with IAIK
String modulePath = "C:/data/applications/HSM/europa_dss/win64/nethsm.dll";
iaik.pkcs.pkcs11.Module module = iaik.pkcs.pkcs11.Module.getInstance(modulePath);
module.initialize(null);
Token token = retrieveToken(slotId, module);
System.out.println("module: " + infoModule(module));
Session session = null;
session = openSession(token, pincode);
// Get the SignedInfo segment that need to be signed.
DSSDocument toSignDocument = new FileDocument(toSignFile);
ToBeSigned dataToSign = service.getDataToSign(toSignDocument, parameters);
byte[] content = dataToSign.getBytes();
System.out.println("parameters: " + parameters);
ByteBuffer byteBuffer = ByteBuffer.wrap(content);
ByteBuffer signedData = signDataByKeyIdAndLabel(keyId, label, byteBuffer, session);
byte[] cmsContent = signedData.array();
System.out.println("signed data: " + Hex.encodeHexString( signedData.array() ) );
System.out.println("signing date: " + parameters.getSigningDate());
System.out.println("signing time: " + parameters.getSigningDate().getTime());
Key hsmPublicKey = findPublicKeyByIDAndLabel(session, keyId, label);
boolean verify = verifyHSM(session, hsmPublicKey, content, cmsContent);
System.out.println("public key: " + hsmPublicKey);
System.out.println("public key (cer): " + cer);
System.out.println("verify: " + verify);
closeSession(session);
private byte[] signHSM(Session session, Key key, byte[] data) throws TokenException {
session.signInit(Mechanism.get(PKCS11Constants.CKM_SHA256_RSA_PKCS), key);
return session.sign(data);
}
private boolean verifyHSM(Session session, Key key, byte[] data, byte[] signature) {
try {
session.verifyInit(Mechanism.get(PKCS11Constants.CKM_SHA256_RSA_PKCS), key);
session.verify(data, signature);
return true;
} catch (TokenException e) {
return false;
}
}
3/ Assemble
assemble(
parameters,
cmsContent,
toSignFile,
signedFile,
service);
public static void assemble(
PAdESSignatureParameters parameters,
byte[] signatureValueBytes,
File toSignFile,
File signedFile,
PAdESService service)
throws IOException {
DSSDocument toSignDocument = new FileDocument(toSignFile);
SignatureValue signatureValue = new SignatureValue(SignatureAlgorithm.RSA_SHA256, signatureValueBytes);
DSSDocument signedDocument = service.signDocument(toSignDocument, parameters, signatureValue);
signedDocument.save(signedFile.getAbsolutePath());
}
}
I receive this error:
com.nimbusds.jose.JOSEException: Invalid private RSA key: Keystore operation failed
And my java.class:
public class MyClass {
private static final String ANDROID_PROVIDER = "AndroidKeyStore";
#RequiresApi(api = Build.VERSION_CODES.M)
public static PublicKey getPublicKeyAndCreateKeypairIfNotExists(String alias) throws GeneralSecurityException, IOException {
KeyStore keyStore = KeyStore.getInstance(ANDROID_PROVIDER);
keyStore.load(null);
if (!keyStore.containsAlias(alias) || keyStore.getCertificate(alias) == null) {
KeyGenParameterSpec spec = new KeyGenParameterSpec.Builder(
alias,
KeyProperties.PURPOSE_SIGN | KeyProperties.PURPOSE_VERIFY)
.setBlockModes(KeyProperties.BLOCK_MODE_ECB)
.setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_RSA_PKCS1)
.setDigests(KeyProperties.DIGEST_SHA256, KeyProperties.DIGEST_SHA512)
.build();
KeyPairGenerator generator = KeyPairGenerator.getInstance(KeyProperties.KEY_ALGORITHM_RSA, ANDROID_PROVIDER);
generator.initialize(spec);
generator.generateKeyPair();
}
return keyStore.getCertificate(alias).getPublicKey();
}
#RequiresApi(api = Build.VERSION_CODES.M)
public static PrivateKey getSecretKey(String alias) throws GeneralSecurityException, IOException {
KeyStore.Entry entry;
//Get Android KeyStore
KeyStore ks = KeyStore.getInstance(ANDROID_PROVIDER);
// Weird artifact of Java API. If you don't have an InputStream to load, you still need to call "load", or it'll crash.
ks.load(null);
// Load the key pair from the Android Key Store
entry = ks.getEntry(alias, null);
KeyStore.PrivateKeyEntry privateKeyEntry = (KeyStore.PrivateKeyEntry)entry;
PrivateKey privateKey = privateKeyEntry.getPrivateKey();
return privateKey;
}
public static String createJWT(String alias) throws JSONException, GeneralSecurityException, IOException, JOSEException {
//
RSASSASigner signer = new RSASSASigner(getSecretKey(alias));
//signer.getJCAContext().setProvider(hsmProvider);
//
SignedJWT jwt = new SignedJWT(
new JWSHeader.Builder(JWSAlgorithm.RS256).keyID(alias).build(),
new JWTClaimsSet.Builder().subject("alice").build());
jwt.sign(signer);
String jwtString = jwt.serialize();
return jwtString;
}
}
The error appears specifically when executing the createJWT method on the line:
jwt.sign(signer);
Apparently the creation of the Keypair is satisfactory, since I have previously tested it and it does not give any error, even with ENCRYPT and DECRYPT it works perfectly. The problem is in the createJWT() method. I really don't know what I'm doing wrong.
Thanks in advance
I ran into this same issue. when i looked into the end of stack trace, the exception was
Caused by: android.security.KeyStoreException: **Incompatible padding mode**
And fixed by setting Signature mode for it, while generating the key
setSignaturePaddings(SIGNATURE_PADDING_RSA_PKCS1)
I am generating a keypair using Java's KeyPairGenerator for use with JGit. However, JSch (the underlying SSH implementation for JGit) keeps giving me "invalid privatekey" errors when trying to use the generated private key.
Here is the stack trace:
Caught: org.eclipse.jgit.api.errors.TransportException: ssh://git#bitbucket.hostname/~wlaw/bitbucket_upgrade_test_repo.git: invalid privatekey: [B#4650a407
org.eclipse.jgit.api.errors.TransportException: ssh://git#bitbucket.hostname/~wlaw/bitbucket_upgrade_test_repo.git: invalid privatekey: [B#4650a407
at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:254)
at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:306)
at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:200)
at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:1)
at java_util_concurrent_Callable$call.call(Unknown Source)
at Test.run(Test.groovy:95)
Caused by: org.eclipse.jgit.errors.TransportException: ssh://git#bitbucket.hostname/~wlaw/bitbucket_upgrade_test_repo.git: invalid privatekey: [B#4650a407
at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:183)
at org.eclipse.jgit.transport.SshTransport.getSession(SshTransport.java:140)
at org.eclipse.jgit.transport.TransportGitSsh$SshFetchConnection.<init>(TransportGitSsh.java:280)
at org.eclipse.jgit.transport.TransportGitSsh.openFetch(TransportGitSsh.java:170)
at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:137)
at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:123)
at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1271)
at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:243)
... 5 more
Caused by: com.jcraft.jsch.JSchException: invalid privatekey: [B#4650a407
at com.jcraft.jsch.KeyPair.load(KeyPair.java:948)
at com.jcraft.jsch.IdentityFile.newInstance(IdentityFile.java:46)
at com.jcraft.jsch.JSch.addIdentity(JSch.java:442)
at Test$1.createDefaultJSch(Test.groovy:82)
at org.eclipse.jgit.transport.JschConfigSessionFactory.getJSch(JschConfigSessionFactory.java:335)
at org.eclipse.jgit.transport.JschConfigSessionFactory.createSession(JschConfigSessionFactory.java:293)
at org.eclipse.jgit.transport.JschConfigSessionFactory.createSession(JschConfigSessionFactory.java:200)
at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:130)
... 12 more
Here is my code:
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA")
keyGen.initialize(4096)
KeyPair pair = keyGen.generateKeyPair()
def pub = pair.public as RSAPublicKey
def priv = pair.private as RSAPrivateCrtKey
Base64.Encoder encoder = Base64.getEncoder();
def publicKeyText = "ssh-rsa " + encoder.encodeToString(keyBlob(pub.publicExponent, pub.modulus))
def id = bitbucket.post {
request.uri.path = "/rest/ssh/1.0/keys"
request.uri.query = [user: bitbucketUsername]
request.body = new JsonBuilder([text: publicKeyText]).toPrettyString()
response.success { FromServer fs, Object responseBody ->
responseBody.id
}
response.failure { FromServer fs, Object responseBody ->
println fs.statusCode
println fs.message
println fs.headers
println responseBody
null
}
}
def privateKeyText = "-----BEGIN RSA PRIVATE KEY-----\n" +
encoder.encodeToString(priv.getEncoded()) +
"\n-----END RSA PRIVATE KEY-----\n"
new File("priv").text = privateKeyText
new File("pub").text = publicKeyText
SshSessionFactory sshSessionFactory = new JschConfigSessionFactory() {
#Override
protected void configure(OpenSshConfig.Host hc, com.jcraft.jsch.Session session) {}
#Override
protected JSch createDefaultJSch(FS fs) throws JSchException {
JSch defaultJSch = super.createDefaultJSch(fs)
defaultJSch.addIdentity("test", privateKeyText.bytes, publicKeyText.bytes, null)
}
};
CloneCommand cloneCommand = Git.cloneRepository()
cloneCommand.setURI("ssh://git#$bitbucketHostPort/$project/${repo}.git")
cloneCommand.setTransportConfigCallback(new TransportConfigCallback() {
#Override
void configure(Transport transport) {
SshTransport sshTransport = (SshTransport) transport
sshTransport.setSshSessionFactory(sshSessionFactory)
}
})
cloneCommand.call()
I did some debugging in the JSch source code, and found that the library is getting an ArrayIndexOutOfBoundsException on line 228 in com.jcraft.jsch.KeyPairRSA.java.
Is it something I am doing wrong with formatting the keys for JSch? Or could this be a bug in Java's implementation of a KeyPair or perhaps JSch's implementation of parsing them?
Here is an example keypair that is generated by my code:
ssh-rsa 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
-----BEGIN RSA PRIVATE KEY-----
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
-----END RSA PRIVATE KEY-----
You need to write the private key in PEM format.
For that you need BouncyCastle library.
For an example see:
Java generate RSA key pair and convert to PEM
I'm writing PGP server to generate keys for users.
I want to sign any generated PGP public key with my private key in Java with Bouncy Castle, to make it trusted for my users.
I have no problems with generating key pair - it works perfect.
I tried to sign by gpg --sign-key command line and it works good.
But I can't get the same in Java. I tried many solutions like this: java sign public pgp key with bouncycastle
and DirectKeySignature class from BC examples package, but nothing works for my.
Key is signed but gpg --check-sigs tell that signature is incorrect:
gpg --check-sigs "Adrian (test) <al#p-c.pl>"
pub 4096R/9D5D4AB8 2018-06-20
sig- E9798A8A 2018-08-04 Test (test) <test#sample.com>
uid Adrian (test) <al#p-c.pl>
sig! 9D5D4AB8 2018-06-20 Adrian (test) <al#p-c.pl>
1 incorrect signature
Source code in two versions:
version 1:
public void signKey(String id, PGPSecretKey mySecretKey, PGPPublicKey publicKeyToBeSigned, char[] passPhrase, OutputStream out) throws PGPException, IOException {
PGPPrivateKey pgpPrivKey = mySecretKey.extractPrivateKey(
new JcePBESecretKeyDecryptorBuilder().setProvider(provider).build(passPhrase));
PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(
new JcaPGPContentSignerBuilder(mySecretKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1));
signatureGenerator.init(PGPSignature.DIRECT_KEY, pgpPrivKey);
PGPSignature signature = signatureGenerator.generateCertification(id, publicKeyToBeSigned);
PGPPublicKey result = PGPPublicKey.addCertification(publicKeyToBeSigned, signature);
out = new ArmoredOutputStream(out);
result.encode(out);
out.close();
}
version 2 (baset on org.bouncycastle.openpgp.examples.DirectKeySignature):
public void signPublicKey(PGPSecretKey secretKey, String secretKeyPass, PGPPublicKey keyToBeSigned, String notationName, String notationValue, OutputStream out) throws Exception {
PGPPrivateKey pgpPrivKey = secretKey.extractPrivateKey(
new JcePBESecretKeyDecryptorBuilder().setProvider("BC").build(secretKeyPass.toCharArray()));
PGPSignatureGenerator sGen = new PGPSignatureGenerator(
new JcaPGPContentSignerBuilder(secretKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1).setProvider("BC"));
sGen.init(PGPSignature.DIRECT_KEY, pgpPrivKey);
PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
boolean isHumanReadable = true;
spGen.setNotationData(true, isHumanReadable, notationName, notationValue);
PGPSignatureSubpacketVector packetVector = spGen.generate();
sGen.setHashedSubpackets(packetVector);
PGPPublicKey result = PGPPublicKey.addCertification(keyToBeSigned, sGen.generate());
out = new ArmoredOutputStream(out);
result.encode(out);
out.close();
}
Test:
#Test
public void signKey() throws Exception {
FileInputStream in = new FileInputStream("src/test/resources/secret.dat");
PgpServiceImpl pgp = new PgpServiceImpl();
PGPSecretKey pgpSecretKey = pgp.readSecretKey(in, "..........".toCharArray());
PGPPublicKey pubKey = pgp.readPublicKey(new FileInputStream("src/test/resources/pub_other.dat"));
ByteArrayOutputStream res = new ByteArrayOutputStream();
pgp.signPublicKey(pgpSecretKey, "..........", pubKey, "Test (test) <test#sample.com>", "Adrian (test) <al#p-c.pl>", res);
System.out.println(new String(res.toByteArray()));
}
result:
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: BCPG v1.60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=9lxJ
-----END PGP PUBLIC KEY BLOCK-----
this works perfectly:
public void signPublicKey(PGPSecretKey secretKey, char[] passPhrase, PGPPublicKey keyToBeSigned, OutputStream out) throws PGPException, IOException {
PGPPrivateKey pgpPrivKey = secretKey.extractPrivateKey(
new JcePBESecretKeyDecryptorBuilder().setProvider( provider )
.build(passPhrase));
PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(
new JcaPGPContentSignerBuilder( secretKey.getPublicKey().getAlgorithm(), PGPUtil.SHA1 ) );
signatureGenerator.init( PGPSignature.DEFAULT_CERTIFICATION, pgpPrivKey );
Iterator<String> ids = keyToBeSigned.getUserIDs();
if(!ids.hasNext()) throw new IllegalArgumentException("klucz nie posiada żadnego User ID");
String id = ids.next();
PGPSignature signature = signatureGenerator.generateCertification(id, keyToBeSigned);
PGPPublicKey newKey = PGPPublicKey.addCertification(keyToBeSigned, id, signature);
out = new ArmoredOutputStream(out);
newKey.encode(out);
out.close();
}
Good day.
I recently create X.509 certificate by using bouncy castle API.
I need to save the certificate result rather than display the result.
I tried to use FileOutputStream, but it does not work.
regards
the result is like follows
-----BEGIN CERTIFICATE-----
MIICeTCCAeKgAwIBAgIGATs8OWsXMA0GCSqGSIb3DQEBCwUAMBsxGTAXBgNVBAMT...
-----END CERTIFICATE-----
The code is belows
import java.io.FileOutputStream;
//example of a basic CA
public class PKCS10CertCreateExample
{
public static X509Certificate[] buildChain() throws Exception
{
//create the certification request
KeyPair pair = chapter7.Utils.generateRSAKeyPair();
PKCS10CertificationRequest request =
PKCS10ExtensionExample.generateRequest(pair);
//create a root certificate
KeyPair rootPair=chapter7.Utils.generateRSAKeyPair();
X509Certificate rootCert = X509V1CreateExample.generateV1Certificate
(rootPair);
//validate the certification request
if(!request.verify("BC"))
{
System.out.println("request failed to verify!");
System.exit(1);
}
//create the certificate using the information in the request
X509V3CertificateGenerator certGen = new X509V3CertificateGenerator();
certGen.setSerialNumber(BigInteger.valueOf(System.currentTimeMillis()));
certGen.setIssuerDN(rootCert.getSubjectX500Principal());
certGen.setNotBefore(new Date(System.currentTimeMillis()));
certGen.setNotAfter(new Date(System.currentTimeMillis()+50000));
certGen.setSubjectDN(request.getCertificationRequestInfo().getSubject());
certGen.setPublicKey(request.getPublicKey("BC"));
certGen.setSignatureAlgorithm("SHA256WithRSAEncryption");
certGen.addExtension(X509Extensions.AuthorityKeyIdentifier, false, new AuthorityKeyIdentifierStructure(rootCert));
certGen.addExtension(X509Extensions.SubjectKeyIdentifier, false, new SubjectKeyIdentifierStructure(request.getPublicKey("BC")));
certGen.addExtension(X509Extensions.BasicConstraints, true, new BasicConstraints(false));
//certGen.addExtension(X509Extensions.KeyUsage, true, new BasicConstraints(false));
certGen.addExtension(X509Extensions.KeyUsage, true, new KeyUsage(KeyUsage.digitalSignature | KeyUsage.keyEncipherment));
certGen.addExtension(X509Extensions.ExtendedKeyUsage, true, new ExtendedKeyUsage(KeyPurposeId.id_kp_serverAuth));
//extract the extension request attribute
ASN1Set attributes = request.getCertificationRequestInfo().getAttributes();
for(int i=0;i!=attributes.size();i++)
{
Attribute attr = Attribute.getInstance(attributes.getObjectAt(i));
//process extension request
if(attr.getAttrType().equals(PKCSObjectIdentifiers.pkcs_9_at_extensionRequest))
{
X509Extensions extensions = X509Extensions.getInstance(attr.getAttrValues().getObjectAt(0));
Enumeration<?> e = extensions.oids();
while(e.hasMoreElements())
{
DERObjectIdentifier oid = (DERObjectIdentifier)e.nextElement();
X509Extension ext = extensions.getExtension(oid);
certGen.addExtension(oid, ext.isCritical(), ext.getValue().getOctets());
}
}
}
X509Certificate issuedCert = certGen.generateX509Certificate(rootPair.getPrivate());
return new X509Certificate[]{issuedCert, rootCert};
}
public static void main(String[] args) throws Exception
{
X509Certificate[] chain = buildChain();
PEMWriter pemWrt = new PEMWriter(new OutputStreamWriter(System.out));
pemWrt.writeObject(chain[0]);
//pemWrt.writeObject(chain[1]);
pemWrt.close();
//write it out
//FileOutputStream fOut = new FileOutputStream("pkcs10req.req");
//fOut.write(chain[0].toString());
//fOut.write()
//System.out.println(chain[0].toString());
//fOut.close();
}
}
Insert following method..
public static void pemEncodeToFile(String filename, Object obj, char[] password) throws Exception{
PEMWriter pw = new PEMWriter(new FileWriter(filename));
if (password != null && password.length > 0) {
pw.writeObject(obj, "DESEDE", password, new SecureRandom());
} else {
pw.writeObject(obj);
}
pw.flush();
pw.close();
}
and call the pemEncodeToFile method like this.
pemEncodeToFile("pkcs10.pem", chain[0], null);
According to the documentation, PEMWriter expects a Writer implementation in its constructor. So you probably need a FileWriter not a FileOutputStream.