Examples of java.security.Provider

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

    return c.getSignature().getBytes();
  }


    public String getSigAlgName()
  {
    Provider  prov = Security.getProvider("BC");
    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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     * return a more "meaningful" representation for the signature algorithm used in
     * the certficate.
     */
    public String getSigAlgName()
    {
        Provider    prov = Security.getProvider("BC");
        String      algName = prov.getProperty("Alg.Alias.Signature." + this.getSigAlgOID());


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

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  }


  static private void testDigest() {
    try {
      MessageDigest md = MessageDigest.getInstance("MD5");
      Provider p = md.getProvider();
      Set<Provider.Service> services = p.getServices();
      for (Provider.Service service : services) {
        System.out.println("Service="+service);
      }
    } catch (NoSuchAlgorithmException e) {
      e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.

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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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         n = reqdProviders.getLength();
         //int providersLoaded = 0;


         for (int i = 0; i < n; i++)
         {
            Provider provider;
            Node reqdProvider = reqdProviders.item(i);


            String providerName;
            String providerClass;
            int requestedPosition = 0;


            if (Node.ELEMENT_NODE == reqdProvider.getNodeType())
            {
               Element prov = (Element) reqdProvider;
               if (prov.hasAttribute("class"))
               {
                  providerClass = prov.getAttribute("class");
               }
               else
               {
                  log.warn("A provider element must, at the very least, have a class attribute: " + prov);
                  continue;
               }


               try
               {
                  provider = (Provider) Class.forName(providerClass).newInstance();
               }
               catch (InstantiationException e1)
               {
                  log.warn("Unable to instantiate an instance of the JCE Provider class " + providerClass, e1);
                  continue;
               }
               catch (IllegalAccessException e1)
               {
                  log.warn("No permission to access the JCE Provider class " + providerClass, e1);
                  continue;
               }
               catch (ClassNotFoundException e1)
               {
                  log.warn("Could not find the JCE Provider class " + providerClass, e1);
                  continue;
               }
               catch (ClassCastException e1)
               {
                  log.warn("The Class " + providerClass + " is not a java.security.Provider");
                  continue;
               }


               providerName = provider.getName();


               if (prov.hasAttribute("position"))
               {
                  try
                  {

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    addedJSSEProvider = false;
    try {
      new URL("https://www.https.test");
    } catch (MalformedURLException e) {
      // Install the default JSSE security provider
      Provider provider = SecurityProviderUtil.getJSSEProvider();
      log.debug("Adding " + provider.getName());


      addedJSSEProvider = Security.addProvider(provider) != -1;
      if (addedJSSEProvider) {
        log.debug("Added " + provider.getName());
      }


      addedHttpsHandler = false;
      // Install the JSSE https handler if it has not already been added
      String protocolHandler = SecurityProviderUtil

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               ClassLoader loader = getContextClassLoader();
               Class<?> clazz = loader.loadClass(keyStoreProvider);
               Class<?>[] ctorSig = {String.class};
               Constructor<?> ctor = clazz.getConstructor(ctorSig);
               Object[] ctorArgs = {keyStoreProviderArgument};
               Provider provider = (Provider) ctor.newInstance(ctorArgs);
               keyStore = KeyStore.getInstance(keyStoreType, provider);
            }
            else
               keyStore = KeyStore.getInstance(keyStoreType, keyStoreProvider);
         }
         else
            keyStore = KeyStore.getInstance(keyStoreType);
         InputStream is = null;
         if ((!"PKCS11".equalsIgnoreCase(keyStoreType) || !"PKCS11IMPLKS".equalsIgnoreCase(keyStoreType)) && keyStoreURL != null)
         {
            is = keyStoreURL.openStream();
         }
         keyStore.load(is, keyStorePass);
         if (keyStoreAlias != null && !keyStore.isKeyEntry(keyStoreAlias))
         {
            throw new IOException("Cannot find key entry with alias " + keyStoreAlias + " in the keyStore");
         }
      }
      if (trustStorePass != null)
      {
         if (trustStoreType == null)
            trustStoreType = KeyStore.getDefaultType();
         if (trustStoreProvider != null)
         {
            if (trustStoreProviderArgument != null)
            {
               ClassLoader loader = getContextClassLoader();
               Class<?> clazz = loader.loadClass(trustStoreProvider);
               Class<?>[] ctorSig = {String.class};
               Constructor<?> ctor = clazz.getConstructor(ctorSig);
               Object[] ctorArgs = {trustStoreProviderArgument};
               Provider provider = (Provider) ctor.newInstance(ctorArgs);
               trustStore = KeyStore.getInstance(trustStoreType, provider);
            }
            else
               trustStore = KeyStore.getInstance(trustStoreType, trustStoreProvider);
         }

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    }
  }


  protected void stopService() throws Exception {
    if (addedJSSEProvider) {
      Provider provider = SecurityProviderUtil.getJSSEProvider();
      String name = provider.getName();
      log.debug("Removing " + name);
      Security.removeProvider(name);
    }


    if (addedHttpsHandler == true) {

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               ClassLoader loader = Thread.currentThread().getContextClassLoader();
               Class clazz = loader.loadClass(keyStoreProvider);
               Class[] ctorSig = {String.class};
               Constructor ctor = clazz.getConstructor(ctorSig);
               Object[] ctorArgs = {keyStoreProviderArgument};
               Provider provider = (Provider) ctor.newInstance(ctorArgs);
               keyStore = KeyStore.getInstance(keyStoreType, provider);
            }
            else
               keyStore = KeyStore.getInstance(keyStoreType, keyStoreProvider);
         }
         else
            keyStore = KeyStore.getInstance(keyStoreType);
         InputStream is = null;
         if ((!"PKCS11".equalsIgnoreCase(keyStoreType) || !"PKCS11IMPLKS".equalsIgnoreCase(keyStoreType)) && keyStoreURL != null)
         {
            is = keyStoreURL.openStream();
         }
         keyStore.load(is, keyStorePassword);
         if (keyStoreAlias != null && !keyStore.isKeyEntry(keyStoreAlias))
         {
            throw new IOException("Cannot find key entry with alias " + keyStoreAlias + " in the keyStore");
         }
         String algorithm = null;
         if (keyMgrFactoryAlgorithm != null)
            algorithm = keyMgrFactoryAlgorithm;
         else
            algorithm = KeyManagerFactory.getDefaultAlgorithm();
         if (keyMgrFactoryProvider != null)
            keyMgr = KeyManagerFactory.getInstance(algorithm, keyMgrFactoryProvider);
         else
            keyMgr = KeyManagerFactory.getInstance(algorithm);
         keyMgr.init(keyStore, keyStorePassword);
         if (keyStoreAlias != null)
         {
            KeyManager[] keyManagers = keyMgr.getKeyManagers();
            for (int i = 0; i < keyManagers.length; i++)
            {
               keyManagers[i] = new SecurityKeyManager((X509KeyManager) keyManagers[i], keyStoreAlias, clientAlias);
            }
         }
      }
      if (trustStorePassword != null)
      {
         if (trustStoreProvider != null)
         {
            if (trustStoreProviderArgument != null)
            {
               ClassLoader loader = Thread.currentThread().getContextClassLoader();
               Class clazz = loader.loadClass(trustStoreProvider);
               Class[] ctorSig = {String.class};
               Constructor ctor = clazz.getConstructor(ctorSig);
               Object[] ctorArgs = {trustStoreProviderArgument};
               Provider provider = (Provider) ctor.newInstance(ctorArgs);
               trustStore = KeyStore.getInstance(trustStoreType, provider);
            }
            else
               trustStore = KeyStore.getInstance(trustStoreType, trustStoreProvider);
         }

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