295 lines
9.7 KiB
Java
295 lines
9.7 KiB
Java
/* KeyManagerFactory.java -- factory for key managers.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.net.ssl;
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import gnu.java.security.Engine;
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import java.lang.reflect.InvocationTargetException;
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import java.security.AccessController;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.KeyStore;
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import java.security.KeyStoreException;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.security.PrivilegedAction;
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import java.security.Provider;
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import java.security.Security;
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import java.security.UnrecoverableKeyException;
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/**
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* A class that creates key manager implementations based on a
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* requested algorithm.
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*
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* @author Casey Marshall (rsdio@metastatic.org)
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*/
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public class KeyManagerFactory
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{
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// Constants and fields.
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// ------------------------------------------------------------------
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/** The service name for key manager factories. */
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private static final String KEY_MANAGER_FACTORY = "KeyManagerFactory";
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/** The system default trust manager algorithm. */
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private static final String DEFAULT_ALGORITHM = "JessieX509";
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/** The underlying engine. */
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private final KeyManagerFactorySpi kmfSpi;
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/** The provider of this implementation. */
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private final Provider provider;
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/** The name of this algorithm. */
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private final String algorithm;
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// Constructor.
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// ------------------------------------------------------------------
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/**
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* Create a new key manager factory.
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*
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* @param kmfSpi The underlying engine.
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* @param provider The engine's provider.
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* @param algorithm The name of this algorithm.
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*/
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protected KeyManagerFactory(KeyManagerFactorySpi kmfSpi,
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Provider provider, String algorithm)
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{
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this.kmfSpi = kmfSpi;
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this.provider = provider;
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this.algorithm = algorithm;
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}
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// Class methods.
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// ------------------------------------------------------------------
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/**
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* Get the default algorithm name. This value may be specified at
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* run-time via the security property
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* "ssl.KeyManagerFactory.algorithm". If this property is
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* not specified, this method returns "JessieX509".
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*
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* @return The default key manager factory algorithm's name.
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*/
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public static final String getDefaultAlgorithm()
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{
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String alg = null;
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try
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{
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alg = (String) AccessController.doPrivileged(
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new PrivilegedAction()
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{
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public Object run()
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{
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return Security.getProperty("ssl.KeyManagerFactory.algorithm");
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}
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}
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);
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}
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catch (SecurityException se)
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{
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}
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if (alg == null)
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alg = DEFAULT_ALGORITHM;
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return alg;
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}
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/**
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* Create an instance of the named key manager factory, from the first
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* provider that implements it.
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*
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* @param algorithm The type of key manager factory to get.
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* @return An appropriate implementation of that algoritm.
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* @throws NoSuchAlgorithmException If no provider implements the requested
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* algorithm.
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* @throws IllegalArgumentException if <code>algorithm</code> is
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* <code>null</code> or is an empty string.
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*/
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public static final KeyManagerFactory getInstance(String algorithm)
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throws NoSuchAlgorithmException
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{
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Provider[] p = Security.getProviders();
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NoSuchAlgorithmException lastException = null;
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for (int i = 0; i < p.length; i++)
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try
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{
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return getInstance(algorithm, p[i]);
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}
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catch (NoSuchAlgorithmException x)
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{
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lastException = x;
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}
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if (lastException != null)
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throw lastException;
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throw new NoSuchAlgorithmException(algorithm);
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}
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/**
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* Create an instance of the named key manager factory, from the named
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* provider.
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*
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* @param algorithm The type of key manager factory to get.
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* @param provider The name of the provider to get the implementation from.
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* @return An appropriate implementation of that algorithm.
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* @throws NoSuchAlgorithmException If the provider does not implement the
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* requested algorithm.
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* @throws NoSuchProviderException If the named provider does not exist.
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* @throws IllegalArgumentException if either <code>algorithm</code> or
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* <code>provider</code> is <code>null</code>, or if
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* <code>algorithm</code> is an empty string.
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*/
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public static final KeyManagerFactory getInstance(String algorithm,
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String provider)
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throws NoSuchAlgorithmException, NoSuchProviderException
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{
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if (provider == null)
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throw new IllegalArgumentException("provider MUST NOT be null");
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Provider p = Security.getProvider(provider);
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if (p == null)
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throw new NoSuchProviderException(provider);
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return getInstance(algorithm, p);
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}
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/**
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* Create an instance of the named key manager factory, from the given
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* provider.
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*
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* @param algorithm The type of key manager factory to get.
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* @param provider The provider to get the implementation from.
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* @return An appropriate implementation of that algorithm.
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* @throws NoSuchAlgorithmException If the provider does not implement the
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* requested algorithm.
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* @throws IllegalArgumentException if either <code>algorithm</code> or
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* <code>provider</code> is <code>null</code>, or if
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* <code>algorithm</code> is an empty string.
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*/
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public static final KeyManagerFactory getInstance(String algorithm,
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Provider provider)
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throws NoSuchAlgorithmException
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{
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StringBuilder sb = new StringBuilder("KeyManagerFactory algorithm [")
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.append(algorithm).append("] from provider[")
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.append(provider).append("] could not be created");
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Throwable cause;
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try
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{
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Object spi = Engine.getInstance(KEY_MANAGER_FACTORY, algorithm, provider);
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return new KeyManagerFactory((KeyManagerFactorySpi) spi, provider, algorithm);
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}
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catch (InvocationTargetException x)
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{
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cause = x.getCause();
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if (cause instanceof NoSuchAlgorithmException)
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throw (NoSuchAlgorithmException) cause;
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if (cause == null)
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cause = x;
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}
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catch (ClassCastException x)
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{
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cause = x;
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}
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NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString());
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x.initCause(cause);
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throw x;
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}
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/**
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* Returns the name of this key manager factory algorithm.
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*
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* @return The name of this key manager factory algorithm.
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*/
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public final String getAlgorithm()
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{
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return algorithm;
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}
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/**
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* Get an array of key managers appropriate for this algorithm, with
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* the most preferred manager first.
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*
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* @return The array of key managers.
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*/
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public final KeyManager[] getKeyManagers()
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{
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return kmfSpi.engineGetKeyManagers();
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}
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/**
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* Returns the provider of this implementation.
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*
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* @return The provider of this implementation.
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*/
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public final Provider getProvider()
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{
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return provider;
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}
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/**
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* Initialize this instance with an implementation-dependent
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* parameter object.
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*
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* @param params The parameters to initialize with.
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* @throws InvalidAlgorithmParameterException If the specified
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* parameters are inappropriate.
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*/
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public final void init(ManagerFactoryParameters params)
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throws InvalidAlgorithmParameterException
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{
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kmfSpi.engineInit(params);
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}
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/**
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* Initialize this instance with a key store and a password for
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* private key entries.
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*
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* @param store The key store to read.
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* @param passwd The password protecting private keys in the store.
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* @throws KeyStoreException If an error occurs reading the keys.
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* @throws NoSuchAlgorithmException If an algorithm (such as a
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* certificate algorithm) is not available.
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* @throws UnrecoverableKeyException If the password is incorrect.
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*/
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public final void init(KeyStore store, char[] passwd)
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throws KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException
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{
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kmfSpi.engineInit(store, passwd);
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}
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}
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