Examples of java.security.cert.Certificate

java.security.cert.Certificate

Abstract class for managing a variety of identity certificates. An identity certificate is a binding of a principal to a public key which is vouched for by another principal. (A principal represents an entity such as an individual user, a group, or a corporation.)
This class is an abstraction for certificates that have different formats but important common uses. For example, different types of certificates, such as X.509 and PGP, share general certificate functionality (like encoding and verifying) and some types of information (like a public key).
X.509, PGP, and SDSI certificates can all be implemented by subclassing the Certificate class, even though they contain different sets of information, and they store and retrieve the information in different ways. @see X509Certificate @see CertificateFactory @author Hemma Prafullchandra @version 1.27, 04/21/06

        try {
            CertificateFactory cf = CertificateFactory.getInstance("X.509",
                    keyStoreProvider);


            is = new FileInputStream(certfile);
            Certificate cert = cf.generateCertificate(is);


            keystore.setCertificateEntry(alias, cert);


            saveKeyStore();
        } finally {

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                                       boolean useSerialNumber)
            throws WSSecurityException {
        Vector issuerRDN = splitAndTrim(issuer);
        X509Certificate x509cert = null;
        Vector certRDN = null;
        Certificate cert = null;


        try {
            for (Enumeration e = keystore.aliases(); e.hasMoreElements();) {
                String alias = (String) e.nextElement();
                Certificate[] certs = keystore.getCertificateChain(alias);

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     * @throws org.apache.ws.security.WSSecurityException
     *          if problems during keystore handling or wrong certificate (no SKI data)
     */


    public String getAliasForX509Cert(byte[] skiBytes) throws WSSecurityException {
        Certificate cert = null;
        boolean found = false;


        try {
            for (Enumeration e = keystore.aliases(); e.hasMoreElements();) {
                String alias = (String) e.nextElement();

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        Certificate[] certs = null;
        try {
            certs = keystore.getCertificateChain(alias);
            if (certs == null || certs.length == 0) {
                // no cert chain, so lets check if getCertificate gives us a  result.
                Certificate cert = keystore.getCertificate(alias);
                if (cert == null) {
                    return null;
                }
                certs = new Certificate[]{cert};
            }

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     * @throws org.apache.ws.security.WSSecurityException
     *          if problems during keystore handling or wrong certificate
     */


    public String getAliasForX509CertThumb(byte[] thumb) throws WSSecurityException {
        Certificate cert = null;
        MessageDigest sha = null;


        try {
            sha = MessageDigest.getInstance("SHA-1");
        } catch (NoSuchAlgorithmException e1) {
            throw new WSSecurityException(
                    0,
                    "noSHA1availabe");
        }
        try {
            for (Enumeration e = keystore.aliases(); e.hasMoreElements();) {
                String alias = (String) e.nextElement();
                Certificate[] certs = keystore.getCertificateChain(alias);
                if (certs == null || certs.length == 0) {
                    // no cert chain, so lets check if getCertificate gives us a  result.
                    cert = keystore.getCertificate(alias);
                    if (cert == null) {
                        return null;
                    }
                } else {
                    cert = certs[0];
                }
                if (!(cert instanceof X509Certificate)) {
                    continue;
                }
                sha.reset();
                try {
                    sha.update(cert.getEncoded());
                } catch (CertificateEncodingException e1) {
                    throw new WSSecurityException(
                            WSSecurityException.SECURITY_TOKEN_UNAVAILABLE,
                            "encodeError");
                }

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    public String[] getAliasesForDN(String subjectDN) throws WSSecurityException {


        // Store the aliases found
        Vector aliases = new Vector();


        Certificate cert = null;


        // The DN to search the keystore for
        Vector subjectRDN = splitAndTrim(subjectDN);


        // Look at every certificate in the keystore

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     * @throws KeyStoreException 
     */
    public Certificate getCertificate(String alias, char[] storePassword) throws KeystoreIsLocked, KeyNotFoundException, KeystoreException {
        ensureLoaded(storePassword);
        try {
            Certificate cert = keystore.getCertificate(alias);
            if (cert == null) {
                throw new KeyNotFoundException("Keystore '"+keystoreName+"' does not contain a certificate with alias'"+alias+"'.");
            }
            return cert;
        } catch (KeyStoreException e) {

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        // Read the certificate from disk and generate a java.security.cert.Certificate
        try {
            FileInputStream fin = new FileInputStream(certFile);
            CertificateFactory certFac = CertificateFactory.getInstance("X.509");
            Certificate cert = certFac.generateCertificate(fin);
            fin.close();
            return cert;
        } catch (Exception e) {
            throw new CertificateStoreException("Error while retrieving certificate.", e);
        }

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    public Certificate getCACertificate() throws CertificateStoreException {
        FileInputStream fin = null;
        try {
            fin = new FileInputStream(new File(storeDir, CA_CERT_FILE));
            CertificateFactory certFac = CertificateFactory.getInstance("X.509");
            Certificate cert = certFac.generateCertificate(fin);
            fin.close();
            return cert;
        } catch (Exception e) {
            throw new CertificateStoreException("Exception in getting CA certificate", e);
        }

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        if(alias == null && request.getParameterMap().containsKey("alias")) {
            // Happens with an alias ""
            alias = "";
        }
        KeystoreData data = ((KeystoreData) request.getPortletSession(true).getAttribute(KEYSTORE_DATA_PREFIX + id));
        Certificate cert;
        try {
            cert = data.getCertificate(alias);
        } catch (KeystoreException e) {
            throw new PortletException(e);
        }

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