Examples of java.security.cert.X509Certificate

java.security.cert.X509Certificate

etf.org/rfc/rfc2459.txt"> http://www.ietf.org/rfc/rfc2459.txt .

The ASN.1 definition of tbsCertificate is:

 TBSCertificate  ::=  SEQUENCE  { version         [0]  EXPLICIT Version DEFAULT v1, serialNumber         CertificateSerialNumber, signature            AlgorithmIdentifier, issuer               Name, validity             Validity, subject              Name, subjectPublicKeyInfo SubjectPublicKeyInfo, issuerUniqueID  [1]  IMPLICIT UniqueIdentifier OPTIONAL, -- If present, version must be v2 or v3 subjectUniqueID [2]  IMPLICIT UniqueIdentifier OPTIONAL, -- If present, version must be v2 or v3 extensions      [3]  EXPLICIT Extensions OPTIONAL -- If present, version must be v3 }

Certificates are instantiated using a certificate factory. The following is an example of how to instantiate an X.509 certificate:

  InputStream inStream = new FileInputStream("fileName-of-cert"); CertificateFactory cf = CertificateFactory.getInstance("X.509"); X509Certificate cert = (X509Certificate)cf.generateCertificate(inStream); inStream.close();

@author Hemma Prafullchandra @version 1.40 @see Certificate @see CertificateFactory @see X509Extension

    * @throws KeyResolverException
    */
   public X509Certificate getX509Certificate() throws KeyResolverException {


      // First search using the individual resolvers from the user
      X509Certificate cert = this.getX509CertificateFromInternalResolvers();


      if (cert != null) {
         if (log.isLoggable(java.util.logging.Level.FINE))                                     log.log(java.util.logging.Level.FINE, 
            "I could find a X509Certificate using the per-KeyInfo key resolvers");

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                  // if we do not have storage resolvers, we verify with null
                  StorageResolver storage = null;


                  if (keyResolver.canResolve((Element) currentChild,
                                             this.getBaseURI(), storage)) {
                     X509Certificate cert =
                        keyResolver
                           .resolveX509Certificate((Element) currentChild, this
                              .getBaseURI(), storage);


                     if (cert != null) {
                        return cert;
                     }
                  }
               } else {
                  for (int k = 0; k < this._storageResolvers.size(); k++) {
                     StorageResolver storage =
                        (StorageResolver) this._storageResolvers.get(k);


                     if (keyResolver.canResolve((Element) currentChild,
                                                this.getBaseURI(), storage)) {
                        X509Certificate cert = keyResolver
                           .resolveX509Certificate((Element) currentChild, this
                              .getBaseURI(), storage);


                        if (cert != null) {
                           return cert;

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                  StorageResolver storage = null;


                  if (keyResolver.engineCanResolve((Element) currentChild,
                                                   this.getBaseURI(),
                                                   storage)) {
                     X509Certificate cert =
                        keyResolver.engineResolveX509Certificate(
                           (Element) currentChild, this.getBaseURI(), storage);


                     if (cert != null) {
                        return cert;
                     }
                  }
               } else {
                  for (int k = 0; k < this._storageResolvers.size(); k++) {
                     StorageResolver storage =
                        (StorageResolver) this._storageResolvers.get(k);


                     if (keyResolver.engineCanResolve((Element) currentChild,
                                                      this.getBaseURI(),
                                                      storage)) {
                        X509Certificate cert =
                           keyResolver.engineResolveX509Certificate(
                              (Element) currentChild, this.getBaseURI(),
                              storage);


                        if (cert != null) {

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      try {
         byte certbytes[] = this.getCertificateBytes();
         CertificateFactory certFact =
            CertificateFactory.getInstance(XMLX509Certificate.JCA_CERT_ID);
         X509Certificate cert =
            (X509Certificate) certFact
               .generateCertificate(new ByteArrayInputStream(certbytes));


         if (cert != null) {
            return cert;

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    * @return teh publickey
    * @throws XMLSecurityException
    */
   public PublicKey getPublicKey() throws XMLSecurityException {


      X509Certificate cert = this.getX509Certificate();


      if (cert != null) {
         return cert.getPublicKey();
      }


      return null;
   }

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         boolean added = false;
         String dn = null;


         try {
            FileInputStream fis = new FileInputStream(file);
            X509Certificate cert =
               (X509Certificate) cf.generateCertificate(fis);


            fis.close();


            //add to ArrayList
            cert.checkValidity();
            this._certs.add(cert);


            dn = cert.getSubjectDN().getName();
            added = true;
         } catch (FileNotFoundException ex) {
            if (log.isLoggable(java.util.logging.Level.FINE))                                     log.log(java.util.logging.Level.FINE, "Could not add certificate from file " + filename, ex);
         } catch (IOException ex) {
            if (log.isLoggable(java.util.logging.Level.FINE))                                     log.log(java.util.logging.Level.FINE, "Could not add certificate from file " + filename, ex);

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      CertsInFilesystemDirectoryResolver krs =
         new CertsInFilesystemDirectoryResolver(
            "data/ie/baltimore/merlin-examples/merlin-xmldsig-eighteen/certs");


      for (Iterator i = krs.getIterator(); i.hasNext(); ) {
         X509Certificate cert = (X509Certificate) i.next();
         byte[] ski =
            com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI
               .getSKIBytesFromCert(cert);


         System.out.println();
         System.out.println("Base64(SKI())=                 \""
                            + Base64.encode(ski) + "\"");
         System.out.println("cert.getSerialNumber()=        \""
                            + cert.getSerialNumber().toString() + "\"");
         System.out.println("cert.getSubjectDN().getName()= \""
                            + cert.getSubjectDN().getName() + "\"");
         System.out.println("cert.getIssuerDN().getName()=  \""
                            + cert.getIssuerDN().getName() + "\"");
      }
   }

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            "xmlsecurity".toCharArray());


      KeyStoreResolver krs = new KeyStoreResolver(ks);


      for (Iterator i = krs.getIterator(); i.hasNext(); ) {
         X509Certificate cert = (X509Certificate) i.next();
         byte[] ski =
            com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509SKI
               .getSKIBytesFromCert(cert);


         System.out.println(com.sun.org.apache.xml.internal.security.utils.Base64.encode(ski));

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    */
   public PublicKey engineResolvePublicKey(
           Element element, String BaseURI, StorageResolver storage)
              throws KeyResolverException {


      X509Certificate cert = this.engineResolveX509Certificate(element,
                                BaseURI, storage);


      if (cert != null) {
         return cert.getPublicKey();
      }


      return null;
   }

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   /** @inheritDoc */
   public PublicKey engineResolvePublicKey(
           Element element, String BaseURI, StorageResolver storage)
              throws KeyResolverException {


      X509Certificate cert = this.engineResolveX509Certificate(element,
                                BaseURI, storage);


      if (cert != null) {
         return cert.getPublicKey();
      }


      return null;
   }

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