Java Code Examples for javax.xml.crypto.dsig.XMLSignatureFactory#getInstance()

public static void main(String[] args) throws SAXException, IOException, ParserConfigurationException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, KeyException, MarshalException, XMLSignatureException, FHIRException {
  // http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html
  //
  byte[] inputXml = "<Envelope xmlns=\"urn:envelope\">\r\n</Envelope>\r\n".getBytes();
  // load the document that's going to be signed
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
  dbf.setNamespaceAware(true);
  DocumentBuilder builder = dbf.newDocumentBuilder();  
  Document doc = builder.parse(new ByteArrayInputStream(inputXml)); 
  
  // create a key pair
  KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
  kpg.initialize(512);
  KeyPair kp = kpg.generateKeyPair(); 
  
  // sign the document
  DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), doc.getDocumentElement()); 
  XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM"); 
 
  Reference ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA1, null), Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null);
  SignedInfo si = fac.newSignedInfo(fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null), fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null), Collections.singletonList(ref));
  
  KeyInfoFactory kif = fac.getKeyInfoFactory(); 
  KeyValue kv = kif.newKeyValue(kp.getPublic());
  KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
  XMLSignature signature = fac.newXMLSignature(si, ki); 
  signature.sign(dsc);
  
  OutputStream os = System.out;
  new XmlGenerator().generate(doc.getDocumentElement(), os);
}
 

public static void main(String[] args) throws SAXException, IOException, ParserConfigurationException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, KeyException, MarshalException, XMLSignatureException, FHIRException, org.hl7.fhir.exceptions.FHIRException {
  // http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html
  //
  byte[] inputXml = "<Envelope xmlns=\"urn:envelope\">\r\n</Envelope>\r\n".getBytes();
  // load the document that's going to be signed
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
  dbf.setNamespaceAware(true);
  DocumentBuilder builder = dbf.newDocumentBuilder();  
  Document doc = builder.parse(new ByteArrayInputStream(inputXml)); 
  
  // create a key pair
  KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
  kpg.initialize(512);
  KeyPair kp = kpg.generateKeyPair(); 
  
  // sign the document
  DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), doc.getDocumentElement()); 
  XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM"); 
 
  Reference ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA1, null), Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null);
  SignedInfo si = fac.newSignedInfo(fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null), fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null), Collections.singletonList(ref));
  
  KeyInfoFactory kif = fac.getKeyInfoFactory(); 
  KeyValue kv = kif.newKeyValue(kp.getPublic());
  KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
  XMLSignature signature = fac.newXMLSignature(si, ki); 
  signature.sign(dsc);
  
  OutputStream os = System.out;
  new XmlGenerator().generate(doc.getDocumentElement(), os);
}
 

/**
 * Check the xmldsig signature of the XML document.
 * @param document the document to test
 * @param publicKey the public key corresponding to the key pair the document was signed with
 * @return true if a correct signature is present, false otherwise
 */
public static boolean validSignature(Document document, Key publicKey) {
    Node signatureNode =  document.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature").item(0);
    KeySelector keySelector = KeySelector.singletonKeySelector(publicKey);

    try {
        String providerName = System.getProperty("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");
        XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM", (Provider) Class.forName(providerName).newInstance());
        DOMValidateContext valContext = new DOMValidateContext(keySelector, signatureNode);

        XMLSignature signature = fac.unmarshalXMLSignature(valContext);
        return signature.validate(valContext);
    } catch (Exception e) {
        Logger.warn("Error validating an XML signature.", e);
        return false;
    }
}
 

private static XMLSignatureFactory getXMLSignatureFactory() {
    XMLSignatureFactory xsf = null;

    try {
        xsf = XMLSignatureFactory.getInstance("DOM", "ApacheXMLDSig");
    } catch (NoSuchProviderException ex) {
        try {
            xsf = XMLSignatureFactory.getInstance("DOM");
        } catch (Exception err) {
            throw new RuntimeException(logger.couldNotCreateInstance("DOM", err));
        }
    }
    return xsf;
}
 

public static void main(String[] args) throws Exception {
    // http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html
    //
    byte[] inputXml = "<Envelope xmlns=\"urn:envelope\">\r\n</Envelope>\r\n".getBytes();
    // load the document that's going to be signed
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
    dbf.setNamespaceAware(true);
    DocumentBuilder builder = dbf.newDocumentBuilder();  
    Document doc = builder.parse(new ByteArrayInputStream(inputXml)); 
    
//    // create a key pair
//    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
//    kpg.initialize(512);
//    KeyPair kp = kpg.generateKeyPair(); 
    PublicKey pub = getPublicKey("C:\\work\\fhirserver\\tests\\signatures\\public_key.der");
    PrivateKey priv = getPrivateKey("C:\\work\\fhirserver\\tests\\signatures\\private_key.der");
    
    // sign the document
    DOMSignContext dsc = new DOMSignContext(priv, doc.getDocumentElement()); 
    XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM"); 
   
    Reference ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA1, null), Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null);
    SignedInfo si = fac.newSignedInfo(fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null), fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null), Collections.singletonList(ref));
    
    KeyInfoFactory kif = fac.getKeyInfoFactory(); 
    KeyValue kv = kif.newKeyValue(pub);
    KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
    XMLSignature signature = fac.newXMLSignature(si, ki); 
    signature.sign(dsc);
    
    OutputStream os = new FileOutputStream("c:\\temp\\java-digsig.xml");
    new XmlGenerator().generate(doc.getDocumentElement(), os);
  }
 

private boolean validate(final DOMValidateContext validationContext)
        throws DigitalSignatureValidationException {

    try {
        // if (getLogger().isDebugLoggingEnabled()) {
        // enableReferenceCaching(validationContext);
        // }

        XMLSignatureFactory factory = XMLSignatureFactory
                .getInstance(XML_MECHANISM_TYPE);
        XMLSignature signature = factory
                .unmarshalXMLSignature(validationContext);
        boolean validationResult = signature.validate(validationContext);

        validationResult = workaroundOpenamBug(signature,
                validationContext, validationResult);

        // if (getLogger().isDebugLoggingEnabled()) {
        // debugLogReferences(signature, validationContext);
        // }
        return validationResult;
    } catch (XMLSignatureException | MarshalException exception) {
        throw new DigitalSignatureValidationException(
                "Error occurred during digital signature validation process",
                DigitalSignatureValidationException.ReasonEnum.EXCEPTION_OCCURRED,
                exception);
    }
}
 

public static void main(String[] args) throws SAXException, IOException, ParserConfigurationException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, KeyException, MarshalException, XMLSignatureException, FHIRException, org.hl7.fhir.exceptions.FHIRException {
  // http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html
  //
  byte[] inputXml = "<Envelope xmlns=\"urn:envelope\">\r\n</Envelope>\r\n".getBytes();
  // load the document that's going to be signed
  DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
  dbf.setNamespaceAware(true);
  DocumentBuilder builder = dbf.newDocumentBuilder();  
  Document doc = builder.parse(new ByteArrayInputStream(inputXml)); 
  
  // create a key pair
  KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
  kpg.initialize(512);
  KeyPair kp = kpg.generateKeyPair(); 
  
  // sign the document
  DOMSignContext dsc = new DOMSignContext(kp.getPrivate(), doc.getDocumentElement()); 
  XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM"); 
 
  Reference ref = fac.newReference("", fac.newDigestMethod(DigestMethod.SHA1, null), Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null, null);
  SignedInfo si = fac.newSignedInfo(fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null), fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null), Collections.singletonList(ref));
  
  KeyInfoFactory kif = fac.getKeyInfoFactory(); 
  KeyValue kv = kif.newKeyValue(kp.getPublic());
  KeyInfo ki = kif.newKeyInfo(Collections.singletonList(kv));
  XMLSignature signature = fac.newXMLSignature(si, ki); 
  signature.sign(dsc);
  
  OutputStream os = System.out;
  new XmlGenerator().generate(doc.getDocumentElement(), os);
}
 

XMLSignature getValidXMLSignature(InputStream fileStream)
        throws ParserConfigurationException,
        IOException,
        SAXException,
        MarshalException,
        XMLSignatureException,
        DOMException
{
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    dbFactory.setNamespaceAware(true);
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document xml = dBuilder.parse(fileStream);
    xml.getDocumentElement().normalize();

    // Find Signature element
    NodeList nl = xml.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature");
    if (nl.getLength() == 0)
    {
        throw new DOMException(DOMException.INDEX_SIZE_ERR, "Missing elements");
    }

    // Create a DOM XMLSignatureFactory that will be used to unmarshal the
    // document containing the XMLSignature
    XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");

    // Create a DOMValidateContext and specify a KeyValue KeySelector
    // and document context
    DOMValidateContext valContext = new DOMValidateContext(new SigningCertSelector(), nl.item(0));

    // unmarshal the XMLSignature
    XMLSignature signature = fac.unmarshalXMLSignature(valContext);

    boolean validSig = signature.validate(valContext);
    if(!validSig)
    {
        throw new XMLSignatureException("Invalid XML signature");
    }
    return signature;
}
 

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    dbf.setNamespaceAware(true);
    dbf.setValidating(false);
    dbf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
    Document doc = dbf.newDocumentBuilder().parse(new File(SIGNATURE));
    NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS,
            "Signature");
    if (nl.getLength() == 0) {
        throw new RuntimeException("Couldn't find 'Signature' element");
    }
    Element element = (Element) nl.item(0);

    byte[] keyBytes = Base64.getDecoder().decode(validationKey);
    X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
    KeyFactory kf = KeyFactory.getInstance("RSA");
    PublicKey key = kf.generatePublic(spec);
    KeySelector ks = KeySelector.singletonKeySelector(key);

    DOMValidateContext vc = new DOMValidateContext(ks, element);

    // disable secure validation mode
    vc.setProperty("org.jcp.xml.dsig.secureValidation", Boolean.FALSE);

    // set a dummy dereferencer to be able to get content by references
    vc.setURIDereferencer(dereferencer);

    XMLSignatureFactory factory = XMLSignatureFactory.getInstance();
    XMLSignature signature = factory.unmarshalXMLSignature(vc);

    // run validation
    signature.validate(vc);
}
 

protected byte[] perform(byte[] input) throws Exception {

      String signMethod = (String)signatureMethod.getSelectedItem();
      PrivateKeyEntry keyEntry = this.selectedEntry;

      XMLSignatureFactory fac = XMLSignatureFactory.getInstance("DOM");
      ArrayList<Reference> references = getReferences(fac);
      SignedInfo signatureInfo = fac.newSignedInfo(fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec)null), fac.newSignatureMethod(signatureMethods.get(signMethod), null), references);
      KeyInfo keyInfo = this.getKeyInfo(fac, keyEntry);
      XMLSignature signature = fac.newXMLSignature(signatureInfo, keyInfo);

      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
      dbf.setNamespaceAware(true);
      Document doc = dbf.newDocumentBuilder().parse(new ByteArrayInputStream(input));
      try {
        validateIdAttributes(doc);
      } catch( Exception e ) {
        throw new IllegalArgumentException("Provided Id identifier seems to be invalid.");
      }
      DOMSignContext dsc = new DOMSignContext (keyEntry.getPrivateKey(), doc.getDocumentElement()); 
      signature.sign(dsc);

      DOMSource source = new DOMSource(doc);
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      StreamResult result = new StreamResult(bos);
      TransformerFactory transformerFactory = TransformerFactory.newInstance();
      Transformer transformer = transformerFactory.newTransformer();
      transformer.transform(source, result);
      return bos.toByteArray();
	}
 

public RequestSigner ( final Configuration configuration ) throws Exception
{
    this.fac = XMLSignatureFactory.getInstance ( "DOM" );
    this.md = this.fac.newDigestMethod ( configuration.getDigestMethod (), null );
    this.kif = this.fac.getKeyInfoFactory ();

    this.t = this.fac.newTransform ( Transform.ENVELOPED, (TransformParameterSpec)null );
    this.ref = this.fac.newReference ( "", this.md, Collections.singletonList ( this.t ), null, null );
    this.cm = this.fac.newCanonicalizationMethod ( CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec)null );
}
 

/**
 * Signs the SAML assertion using the specified public and private keys.
 * 
 * @param document
 *            SAML assertion be signed.
 * @param privateKey
 *            Private key used to sign SAML assertion.
 * @param publicKey
 *            Public key used to sign SAML asserion.
 * @return w3c element representation of specified document.
 * @throws NoSuchAlgorithmException
 * @throws InvalidAlgorithmParameterException
 * @throws KeyException
 * @throws MarshalException
 * @throws XMLSignatureException
 */
private Element signSamlAssertion(Document document, PrivateKey privateKey, X509Certificate certificate)
        throws NoSuchAlgorithmException, InvalidAlgorithmParameterException, KeyException, MarshalException,
        XMLSignatureException {
    XMLSignatureFactory signatureFactory = XMLSignatureFactory.getInstance("DOM");
    List<Transform> envelopedTransform = Collections.singletonList(signatureFactory.newTransform(
            Transform.ENVELOPED, (TransformParameterSpec) null));
    Reference ref = signatureFactory.newReference("", signatureFactory.newDigestMethod(DigestMethod.SHA1, null),
            envelopedTransform, null, null);
    
    SignatureMethod signatureMethod = null;
    if (certificate.getPublicKey() instanceof DSAPublicKey) {
        signatureMethod = signatureFactory.newSignatureMethod(SignatureMethod.DSA_SHA1, null);
    } else if (certificate.getPublicKey() instanceof RSAPublicKey) {
        signatureMethod = signatureFactory.newSignatureMethod(SignatureMethod.RSA_SHA1, null);
    }
    
    CanonicalizationMethod canonicalizationMethod = signatureFactory.newCanonicalizationMethod(
            CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS, (C14NMethodParameterSpec) null);
    
    SignedInfo signedInfo = signatureFactory.newSignedInfo(canonicalizationMethod, signatureMethod,
            Collections.singletonList(ref));
    
    KeyInfoFactory keyInfoFactory = signatureFactory.getKeyInfoFactory();
    X509Data data = keyInfoFactory.newX509Data(Collections.singletonList(certificate));
    KeyInfo keyInfo = keyInfoFactory.newKeyInfo(Collections.singletonList(data));
    
    Element w3cElement = document.getDocumentElement();
    Node xmlSigInsertionPoint = getXmlSignatureInsertionLocation(w3cElement);
    DOMSignContext dsc = new DOMSignContext(privateKey, w3cElement, xmlSigInsertionPoint);
    
    XMLSignature signature = signatureFactory.newXMLSignature(signedInfo, keyInfo);
    signature.sign(dsc);
    return w3cElement;
}
 

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    dbf.setNamespaceAware(true);
    dbf.setValidating(false);
    dbf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
    Document doc = dbf.newDocumentBuilder().parse(new File(SIGNATURE));
    NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS,
            "Signature");
    if (nl.getLength() == 0) {
        throw new RuntimeException("Couldn't find 'Signature' element");
    }
    Element element = (Element) nl.item(0);

    byte[] keyBytes = Base64.getDecoder().decode(validationKey);
    X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
    KeyFactory kf = KeyFactory.getInstance("RSA");
    PublicKey key = kf.generatePublic(spec);
    KeySelector ks = KeySelector.singletonKeySelector(key);

    DOMValidateContext vc = new DOMValidateContext(ks, element);

    // disable secure validation mode
    vc.setProperty("org.jcp.xml.dsig.secureValidation", Boolean.FALSE);

    // set a dummy dereferencer to be able to get content by references
    vc.setURIDereferencer(dereferencer);

    XMLSignatureFactory factory = XMLSignatureFactory.getInstance();
    XMLSignature signature = factory.unmarshalXMLSignature(vc);

    // run validation
    signature.validate(vc);
}
 

/**
 * Verifies that signed mark data contains a valid signature.
 *
 * <p>This method DOES NOT check if the SMD ID is revoked. It's only concerned with the
 * cryptographic stuff.
 *
 * @throws GeneralSecurityException for unsupported protocols, certs not signed by the TMCH,
 *     incorrect keys, and for invalid, old, not-yet-valid or revoked certificates.
 */
public void verify(byte[] smdXml)
    throws GeneralSecurityException, IOException, MarshalException, ParserConfigurationException,
        SAXException, XMLSignatureException {
  checkArgument(smdXml.length > 0);
  Document doc = parseSmdDocument(new ByteArrayInputStream(smdXml));

  NodeList signatureNodes = doc.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature");
  if (signatureNodes.getLength() != 1) {
    throw new XMLSignatureException("Expected exactly one <ds:Signature> element.");
  }
  XMLSignatureFactory factory = XMLSignatureFactory.getInstance("DOM");
  KeyValueKeySelector selector = new KeyValueKeySelector(tmchCertificateAuthority);
  DOMValidateContext context = new DOMValidateContext(selector, signatureNodes.item(0));
  XMLSignature signature = factory.unmarshalXMLSignature(context);

  boolean isValid;
  try {
    isValid = signature.validate(context);
  } catch (XMLSignatureException e) {
    throwIfInstanceOf(getRootCause(e), GeneralSecurityException.class);
    throw e;
  }
  if (!isValid) {
    throw new XMLSignatureException(explainValidationProblem(context, signature));
  }
}
 

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    dbf.setNamespaceAware(true);
    dbf.setValidating(false);
    dbf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
    Document doc = dbf.newDocumentBuilder().parse(new File(SIGNATURE));
    NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS,
            "Signature");
    if (nl.getLength() == 0) {
        throw new RuntimeException("Couldn't find 'Signature' element");
    }
    Element element = (Element) nl.item(0);

    byte[] keyBytes = Base64.getDecoder().decode(validationKey);
    X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
    KeyFactory kf = KeyFactory.getInstance("RSA");
    PublicKey key = kf.generatePublic(spec);
    KeySelector ks = KeySelector.singletonKeySelector(key);

    DOMValidateContext vc = new DOMValidateContext(ks, element);

    // disable secure validation mode
    vc.setProperty("org.jcp.xml.dsig.secureValidation", Boolean.FALSE);

    // set a dummy dereferencer to be able to get content by references
    vc.setURIDereferencer(dereferencer);

    XMLSignatureFactory factory = XMLSignatureFactory.getInstance();
    XMLSignature signature = factory.unmarshalXMLSignature(vc);

    // run validation
    signature.validate(vc);
}
 

public RequestValidator ( final KeySelector keySelector )
{
    this.factory = XMLSignatureFactory.getInstance ( "DOM" ); //$NON-NLS-1$
    this.keySelector = keySelector;
}
 

private static XMLSignatureFactory initXMLSigFactory() {
    XMLSignatureFactory fac = XMLSignatureFactory.getInstance();
    return fac;
}
 

private static Element signSamlElement(final Element element, final PrivateKey privKey,
        final PublicKey pubKey) {
    try {
        final String providerName = System.getProperty("jsr105Provider",
                JSR_105_PROVIDER);
        final XMLSignatureFactory sigFactory = XMLSignatureFactory
                .getInstance("DOM", (Provider) Class.forName(providerName)
                        .newInstance());

        final List envelopedTransform = Collections
                .singletonList(sigFactory.newTransform(Transform.ENVELOPED,
                        (TransformParameterSpec) null));

        final Reference ref = sigFactory.newReference("", sigFactory
                .newDigestMethod(DigestMethod.SHA1, null), envelopedTransform,
                null, null);

        // Create the SignatureMethod based on the type of key
        SignatureMethod signatureMethod;
        if (pubKey instanceof DSAPublicKey) {
            signatureMethod = sigFactory.newSignatureMethod(
                    SignatureMethod.DSA_SHA1, null);
        } else if (pubKey instanceof RSAPublicKey) {
            signatureMethod = sigFactory.newSignatureMethod(
                    SignatureMethod.RSA_SHA1, null);
        } else {
            throw new RuntimeException(
                    "Error signing SAML element: Unsupported type of key");
        }

        final CanonicalizationMethod canonicalizationMethod = sigFactory
                .newCanonicalizationMethod(
                        CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS,
                        (C14NMethodParameterSpec) null);

        // Create the SignedInfo
        final SignedInfo signedInfo = sigFactory.newSignedInfo(
                canonicalizationMethod, signatureMethod, Collections
                .singletonList(ref));

        // Create a KeyValue containing the DSA or RSA PublicKey
        final KeyInfoFactory keyInfoFactory = sigFactory
                .getKeyInfoFactory();
        final KeyValue keyValuePair = keyInfoFactory.newKeyValue(pubKey);

        // Create a KeyInfo and add the KeyValue to it
        final KeyInfo keyInfo = keyInfoFactory.newKeyInfo(Collections
                .singletonList(keyValuePair));
        // Convert the JDOM document to w3c (Java XML signature API requires
        // w3c
        // representation)
        org.w3c.dom.Element w3cElement = toDom(element);

        // Create a DOMSignContext and specify the DSA/RSA PrivateKey and
        // location of the resulting XMLSignature's parent element
        DOMSignContext dsc = new DOMSignContext(privKey, w3cElement);

        org.w3c.dom.Node xmlSigInsertionPoint = getXmlSignatureInsertLocation(w3cElement);
        dsc.setNextSibling(xmlSigInsertionPoint);

        // Marshal, generate (and sign) the enveloped signature
        XMLSignature signature = sigFactory.newXMLSignature(signedInfo,
                keyInfo);
        signature.sign(dsc);

        return toJdom(w3cElement);

    } catch (final Exception e) {
        throw new RuntimeException("Error signing SAML element: "
                + e.getMessage(), e);
    }
}
 

private XMLSignatureFactory initXMLSigFactory() {
        XMLSignatureFactory fac = XMLSignatureFactory.getInstance();
        return fac;
}
 

private XMLSignatureFactory initXMLSigFactory() {
    XMLSignatureFactory fac = XMLSignatureFactory.getInstance();
    return fac;
}