Examples of java.security.Provider$EngineDescription

java.security.Provider

This class represents a "provider" for the Java Security API, where a provider implements some or all parts of Java Security. Services that a provider may implement include:

Algorithms (such as DSA, RSA, MD5 or SHA-1).
Key generation, conversion, and management facilities (such as for algorithm-specific keys).

Each provider has a name and a version number, and is configured in each runtime it is installed in.

See The Provider Class in the "Java Cryptography Architecture API Specification & Reference" for information about how a particular type of provider, the cryptographic service provider, works and is installed. However, please note that a provider can be used to implement any security service in Java that uses a pluggable architecture with a choice of implementations that fit underneath.

Some provider implementations may encounter unrecoverable internal errors during their operation, for example a failure to communicate with a security token. A {@link ProviderException} should be used to indicate such errors.

The service type Provider is reserved for use by the security framework. Services of this type cannot be added, removed, or modified by applications. The following attributes are automatically placed in each Provider object:

Name	Value
`Provider.id name`	`String.valueOf(provider.getName())`
`Provider.id version`	`String.valueOf(provider.getVersion())`
`Provider.id info`	`String.valueOf(provider.getInfo())`
`Provider.id className`	`provider.getClass().getName()`

@version 1.77, 08/07/06 @author Benjamin Renaud @author Andreas Sterbenz

     *            be a subclass of <code>java.security.Provider</code>
     * 
     * @return Returns the actual name of the provider that was loaded
     */
    public static String appendJceProvider(String name, String className) {
        Provider currentProvider = Security.getProvider(name);
        if (currentProvider == null) {
            try {
                Class<? extends Provider> clazz = Loader.loadClass(className, false, Provider.class);
                Provider provider = clazz.newInstance();
                
                int ret = Security.addProvider(provider);
                if (LOG.isDebugEnabled()) {
                    LOG.debug(
                        "The provider " + provider.getName() 
                        + " was added at position: " + ret
                    );
                }
                return provider.getName();
            } catch (Throwable t) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("The provider " + name + " could not be added: " + t.getMessage(), t);
                }
                return null;

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     *            A subclass of <code>java.security.Provider</code>
     * 
     * @return Returns the actual name of the provider that was loaded
     */
    public static String appendJceProvider(String name, Provider provider) {
        Provider currentProvider = Security.getProvider(name);
        if (currentProvider == null) {
            try {
                int ret = Security.addProvider(provider);
                if (LOG.isDebugEnabled()) {
                    LOG.debug(
                        "The provider " + provider.getName() 
                        + " was added at position: " + ret
                    );
                }
                return provider.getName();
            } catch (Throwable t) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("The provider " + name + " could not be added: " + t.getMessage(), t);
                }
                return null;
            }
        }
        return currentProvider.getName();
    }

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            if (cons == null) {
                bouncyCastleAvailable = false;
                // BouncyCastle is not available so just return
                return;
            } else {
                Provider provider = (java.security.Provider)cons.newInstance();
                Security.insertProviderAt(provider, 2);
            }
        }
        
        db = XMLUtils.createDocumentBuilder(false);

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            if (cons == null) {
                bouncyCastleAvailable = false;
                // BouncyCastle is not available so just return
                return;
            } else {
                Provider provider = (java.security.Provider)cons.newInstance();
                Security.insertProviderAt(provider, 2);
            }
        }
        
        db = XMLUtils.createDocumentBuilder(false);

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            if (cons == null) {
                bouncyCastleAvailable = false;
                // BouncyCastle is not available so just return
                return;
            } else {
                Provider provider = (java.security.Provider)cons.newInstance();
                Security.insertProviderAt(provider, 2);
            }
        }
        
        db = XMLUtils.createDocumentBuilder(false);

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    * 
    * @return the provider
    */
   public static Provider getJSSEProvider() 
   {
      Provider obj = null;
      ClassLoader tcl = Thread.currentThread().getContextClassLoader();
      Class clazz;
      try
      {
         clazz = tcl.loadClass(jsseProviderClassName);

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     * return a more "meaningful" representation for the signature algorithm used in
     * the certficate.
     */
    public String getSigAlgName()
    {
        Provider    prov = Security.getProvider("BC");


        if (prov != null)
        {
            String      algName = prov.getProperty("Alg.Alias.Signature." + this.getSigAlgOID());


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

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    }


    static Provider getProvider(String provider)
        throws NoSuchProviderException
    {
        Provider prov = Security.getProvider(provider);


        if (prov == null)
        {
            throw new NoSuchProviderException("Provider " + provider + " not found");
        }

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    public void testSecretKeyFactory08() throws NoSuchAlgorithmException {
        if (!DEFSupported) {
            fail(NotSupportMsg);
            return;
        }
        Provider prov = null;
        for (int i = 0; i < validValues.length; i++) {
            try {
                SecretKeyFactory.getInstance(validValues[i], prov);
                fail("IllegalArgumentException was not thrown as expected (provider is null, algorithm: "
                        .concat(validValues[i]).concat(")"));

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    // Test for method java.security.Provider
    // java.security.KeyFactory.getProvider()
    for (int i = 0; i < keyfactAlgs.length; i++) {
      try {
        KeyFactory fact = KeyFactory.getInstance(keyfactAlgs[i]);
        Provider p = fact.getProvider();
        assertNotNull("provider is null for algorithm "
            + keyfactAlgs[i], p);
      } catch (NoSuchAlgorithmException e) {
        fail("getInstance did not find algorithm " + keyfactAlgs[i]);
      }

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