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

   * Returns the key algorithms that the given provider supports.
   */
  private String[] getKeyFactoryAlgorithms(String providerName) {
    Vector algs = new Vector();


    Provider provider = Security.getProvider(providerName);
    if (provider == null)
      return new String[0];
    Enumeration e = provider.keys();
    while (e.hasMoreElements()) {
      String algorithm = (String) e.nextElement();
      if (algorithm.startsWith(KEYFACTORY_ID) && !algorithm.contains(" ")) {
        algs.addElement(algorithm.substring(KEYFACTORY_ID.length()));
      }

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  /**
   * @tests java.security.Signature#getProvider()
   */
  public void test_getProvider() throws Exception {
           Provider p = Signature.getInstance("DSA").getProvider();
           assertNotNull("provider is null", p);
  }

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            Security.insertProviderAt(null, 1);
            fail("No expected NullPointerException");
        } catch (NullPointerException e) {
        }


        Provider p = new MyProvider();
        int initNum = Security.getProviders().length; // initial number of providers
        Provider initialSecondProviderName = Security.getProviders()[1];


        try {


            // Insert at position -1, the provider is inserted at the end 
            assertEquals(initNum + 1, Security.insertProviderAt(p, -1));

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            Security.addProvider(null);
            fail("No expected NullPointerException");
        } catch (NullPointerException e) {
        }


        Provider p = new MyProvider();
        int initNum = Security.getProviders().length; // initial number of providers


        try {
            // add
            assertEquals(initNum + 1, Security.addProvider(p));
            assertSame(p, Security.getProviders()[initNum]);


            // A provider cannot be added if it is already installed
            assertEquals(-1, Security.addProvider(p));
        } finally { //clean up
            Security.removeProvider(p.getName());
        }
    }

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            String providerName = p.getName();
            assertSame(p, Security.getProvider(providerName));
        }


        // test for newly installed provider
        Provider p = new MyProvider();
        try {
            Security.addProvider(p);


            assertSame(p, Security.getProvider(p.getName()));
        } finally { //clean up
            Security.removeProvider(p.getName());
        }
    }

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            Security.getProviders((String) null);
            fail("No expected NullPointerException");
        } catch (NullPointerException e) {
        }


        Provider p = new MyProvider();
        try {
            Security.addProvider(p);


            String filter = "MyService.MyAlgorithm";
            assertTrue(filter, Arrays.equals(new Provider[] { p }, Security
                    .getProviders(filter)));


            filter = "MyService.MyAlgorithm KeySize:512";
            assertTrue(filter, Arrays.equals(new Provider[] { p }, Security
                    .getProviders(filter)));


            filter = "MyService.MyAlgorithm KeySize:1025";
            assertNull(filter, Security.getProviders(filter));


            // attribute name and value are case insensitive 
            filter = "MyService.MyAlgorithm imPLementedIn:softWARE";
            assertTrue(filter, Arrays.equals(new Provider[] { p }, Security
                    .getProviders(filter)));
            filter = "MyService.MyAlgorithm ATTribute:attributeVALUE";
            assertTrue(filter, Arrays.equals(new Provider[] { p }, Security
                    .getProviders(filter)));


            // Regression for HARMONY-2761
            filter = "MyService.NoKeySize KeySize:512";
            assertNull(filter, Security.getProviders(filter));


            filter = "MyService.NoImplementedIn ImplementedIn:Software";
            assertNull(filter, Security.getProviders(filter));


            filter = "ABCService.NoAttribute Attribute:ABC";
            assertNull(filter, Security.getProviders(filter));
        } finally { //clean up
            Security.removeProvider(p.getName());
        }
    }

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            Security.getProviders(m);
            fail("No expected InvalidParameterException");
        } catch (InvalidParameterException e) {
        }


        Provider p = new MyProvider();
        try {
            Security.addProvider(p);


            m.clear();
            m.put("MyService.MyAlgorithm", "");
            m.put("MessageDigest.SHA-1", "");
            assertTrue("MyService.MyAlgorithm", Arrays.equals(
                    new Provider[] { p }, Security.getProviders(m)));


            m.clear();
            m.put("MyService.MyAlgorithm KeySize", "512");
            m.put("MessageDigest.SHA-1", "");
            assertTrue("MyService.MyAlgorithm KeySize:512", Arrays.equals(
                    new Provider[] { p }, Security.getProviders(m)));


            m.clear();
            m.put("MyService.MyAlgorithm KeySize", "1025");
            m.put("MessageDigest.SHA-1", "");
            assertNull("MyService.MyAlgorithm KeySize:1025", Security
                    .getProviders(m));


            // attribute name and value are case insensitive 
            m.clear();
            m.put("MyService.MyAlgorithm imPLementedIn", "softWARE");
            assertTrue(Arrays.equals(new Provider[] { p }, Security
                    .getProviders(m)));
            m.clear();
            m.put("MyService.MyAlgorithm ATTribute", "attributeVALUE");
            assertTrue(Arrays.equals(new Provider[] { p }, Security
                    .getProviders(m)));


            // Regression for HARMONY-2761
            m.clear();
            m.put("MyService.NoKeySize KeySize", "512");
            assertNull("No KeySize attribute", Security.getProviders(m));
            
            m.clear();
            m.put("MyService.NoImplementedIn ImplementedIn", "Software");
            assertNull("No ImplementedIn attribute", Security.getProviders(m));
            
            m.clear();
            m.put("ABCService.NoAttribute Attribute", "ABC");
            assertNull(Security.getProviders(m));
        } finally { //clean up
            Security.removeProvider(p.getName());
        }
    }

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    public void testTrustManagerFactory07() throws NoSuchAlgorithmException {
        if (!DEFSupported) {
            fail(NotSupportedMsg);
            return;
        }
        Provider provider = null;
        for (int i = 0; i < validValues.length; i++) {
            try {
                TrustManagerFactory.getInstance(validValues[i], provider);
                fail("IllegalArgumentException must be thrown  when provider is null");
            } catch (IllegalArgumentException e) {

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    public void testKeyManagerFactory07() throws NoSuchAlgorithmException {
        if (!DEFSupported) {
            fail(NotSupportedMsg);
            return;
        }
        Provider provider = null;
        for (int i = 0; i < validValues.length; i++) {
            try {
                KeyManagerFactory.getInstance(validValues[i], provider);
                fail("Expected IllegalArgumentException was not thrown when provider is null");
            } catch (IllegalArgumentException e) {

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            // alcohol :-)
            Session sesh;
            Authenticator auth;
            if (SSL) {
                try {
                    Provider p = (Provider) Class.forName(
                        "com.sun.net.ssl.internal.ssl.Provider").newInstance();
                    Security.addProvider(p);
                } catch (Exception e) {
                    throw new BuildException("could not instantiate ssl "
                        + "security provider, check that you have JSSE in "

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