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


         X509Data x509data = new X509Data(element, BaseURI);
         int noOfISS = x509data.lengthIssuerSerial();


         while (storage.hasNext()) {
            X509Certificate cert = storage.next();
            XMLX509IssuerSerial certSerial = new XMLX509IssuerSerial(element.getOwnerDocument(), cert);


            if (true) {
              if (log.isLoggable(java.util.logging.Level.FINE))                                     log.log(java.util.logging.Level.FINE, "Found Certificate Issuer: "
                      + certSerial.getIssuerName());

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               // if the resource stores a raw certificate, we have to handle it
               CertificateFactory certFact =
                  CertificateFactory
                     .getInstance(XMLX509Certificate.JCA_CERT_ID);
               X509Certificate cert =
                  (X509Certificate) certFact
                     .generateCertificate(new ByteArrayInputStream(inputBytes));


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


               // otherwise, we parse the resource, create an Element and delegate
                if (true)

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               // if the resource stores a raw certificate, we have to handle it
               CertificateFactory certFact =
                  CertificateFactory
                     .getInstance(XMLX509Certificate.JCA_CERT_ID);
               X509Certificate cert =
                  (X509Certificate) certFact
                     .generateCertificate(new ByteArrayInputStream(inputBytes));


               if (cert != null) {
                  return cert;

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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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               new XMLX509Certificate(this._x509CertKeyElements[i]
                  , BaseURI);
         }


         for (int i = 0; i < this._x509certObject.length; i++) {
            X509Certificate cert = this._x509certObject[i].getX509Certificate();


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

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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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            this._x509childObject[i] =
               new XMLX509SKI(this._x509childNodes[i], BaseURI);
         }


         while (storage.hasNext()) {
            X509Certificate cert = storage.next();
            XMLX509SKI certSKI = new XMLX509SKI(element.getOwnerDocument(), cert);


            for (int i = 0; i < this._x509childObject.length; i++) {
               if (certSKI.equals(this._x509childObject[i])) {
                  if (log.isLoggable(java.util.logging.Level.FINE))                                     log.log(java.util.logging.Level.FINE, "Return PublicKey from "
                            + cert.getSubjectDN().getName());


                  return cert;
               }
            }
         }

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  // extension marked as critical.
  if (certificate instanceof java.security.cert.X509Certificate) {
      // Check whether the cert has a key usage extension
      // marked as a critical extension.
      // The OID for KeyUsage extension is 2.5.29.15.
      X509Certificate cert = (X509Certificate)certificate;
      Set critSet = cert.getCriticalExtensionOIDs();


      if (critSet != null && !critSet.isEmpty()
    && critSet.contains("2.5.29.15")) {
    boolean[] keyUsageInfo = cert.getKeyUsage();
    // keyUsageInfo[0] is for digitalSignature.
    if ((keyUsageInfo != null) && (keyUsageInfo[0] == false))
        throw new InvalidKeyException("Wrong key usage");
      }
  }

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        LOG.debug("X509Certificate[" + i + "]=" + certificates[i]);
      }
    }
    if (certificates != null) {
      for (int i = 0; i < certificates.length; i++) {
        X509Certificate certificate = certificates[i];
        try {
          certificate.checkValidity();
        } catch (CertificateException e) {
          LOG.error(e.toString());
          throw e;
        }
      }

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//        } catch(CertificateException ex) {
        if (certs == null) {
          if (log.isInfoEnabled())
            log.info("No certs for " + alias + ", untrusted.");
        } else if (certs.length > 1) {
            X509Certificate x509cert = (X509Certificate) certs[certs.length - 1];
            TrustedCACertStore store = new TrustedCACertStore();
            ByteArrayInputStream bin = new ByteArrayInputStream(x509cert.getEncoded());
            DERInputStream der = null;
            try {
                der = new DERInputStream(bin);


                ASN1Sequence certificate = (ASN1Sequence) der.readObject();

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