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jeremybenn |
/* SSLContextImpl.java --
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is a 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 of the License, or (at
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your option) 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; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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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 gnu.javax.net.ssl.provider;
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import gnu.java.security.action.GetSecurityPropertyAction;
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import gnu.javax.net.ssl.AbstractSessionContext;
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import gnu.javax.net.ssl.NullManagerParameters;
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import gnu.javax.net.ssl.PreSharedKeyManager;
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import gnu.javax.net.ssl.SRPTrustManager;
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import java.security.AccessController;
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import java.security.KeyManagementException;
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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.SecureRandom;
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import java.security.UnrecoverableKeyException;
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import javax.net.ssl.KeyManager;
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import javax.net.ssl.KeyManagerFactory;
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import javax.net.ssl.SSLContextSpi;
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import javax.net.ssl.SSLEngine;
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import javax.net.ssl.SSLException;
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import javax.net.ssl.SSLServerSocketFactory;
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import javax.net.ssl.SSLSessionContext;
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import javax.net.ssl.SSLSocketFactory;
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import javax.net.ssl.TrustManager;
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import javax.net.ssl.TrustManagerFactory;
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import javax.net.ssl.X509ExtendedKeyManager;
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import javax.net.ssl.X509TrustManager;
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/**
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* Our implementation of {@link SSLContextSpi}.
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*
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* @author Casey Marshall (csm@gnu.org)
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*/
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public final class SSLContextImpl extends SSLContextSpi
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{
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AbstractSessionContext serverContext;
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AbstractSessionContext clientContext;
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PreSharedKeyManager pskManager;
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X509ExtendedKeyManager keyManager;
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X509TrustManager trustManager;
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SRPTrustManager srpTrustManager;
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SecureRandom random;
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public SSLContextImpl()
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{
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineCreateSSLEngine()
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*/
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protected @Override SSLEngine engineCreateSSLEngine()
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{
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return engineCreateSSLEngine(null, -1);
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineCreateSSLEngine(java.lang.String, int)
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*/
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protected @Override SSLEngine engineCreateSSLEngine(String host, int port)
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{
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return new SSLEngineImpl(this, host, port);
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineGetClientSessionContext()
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*/
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protected @Override synchronized SSLSessionContext engineGetClientSessionContext()
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{
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if (clientContext == null)
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{
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try
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{
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clientContext = AbstractSessionContext.newInstance();
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}
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catch (SSLException ssle)
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{
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// XXX Ignore?
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}
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}
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return clientContext;
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineGetServerSessionContext()
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*/
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protected @Override synchronized SSLSessionContext engineGetServerSessionContext()
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{
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if (serverContext == null)
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{
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try
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{
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serverContext = AbstractSessionContext.newInstance();
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}
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catch (SSLException ssle)
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{
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// XXX Ignore?
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}
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}
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return serverContext;
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineGetServerSocketFactory()
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*/
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protected @Override SSLServerSocketFactory engineGetServerSocketFactory()
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{
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return new SSLServerSocketFactoryImpl(this);
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineGetSocketFactory()
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*/
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protected @Override SSLSocketFactory engineGetSocketFactory()
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{
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return new SSLSocketFactoryImpl(this);
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}
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/* (non-Javadoc)
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* @see javax.net.ssl.SSLContextSpi#engineInit(javax.net.ssl.KeyManager[], javax.net.ssl.TrustManager[], java.security.SecureRandom)
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*/
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protected @Override void engineInit(KeyManager[] keyManagers,
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TrustManager[] trustManagers,
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SecureRandom random)
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throws KeyManagementException
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{
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keyManager = null;
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trustManager = null;
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srpTrustManager = null;
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if (keyManagers != null)
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{
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for (int i = 0; i < keyManagers.length; i++)
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{
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if ((keyManagers[i] instanceof X509ExtendedKeyManager)
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&& keyManager == null)
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keyManager = (X509ExtendedKeyManager) keyManagers[i];
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if (keyManagers[i] instanceof PreSharedKeyManager
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&& pskManager == null)
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pskManager = (PreSharedKeyManager) keyManagers[i];
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}
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}
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if (keyManager == null)
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keyManager = defaultKeyManager();
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if (trustManagers != null)
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{
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for (int i = 0; i < trustManagers.length; i++)
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{
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if (trustManagers[i] instanceof X509TrustManager)
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{
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if (trustManager == null)
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trustManager = (X509TrustManager) trustManagers[i];
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}
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else if (trustManagers[i] instanceof SRPTrustManager)
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{
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if (srpTrustManager == null)
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srpTrustManager = (SRPTrustManager) trustManagers[i];
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}
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}
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}
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if (trustManager == null && srpTrustManager == null)
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{
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trustManager = defaultTrustManager();
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}
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if (random != null)
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{
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this.random = random;
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}
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else
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{
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this.random = defaultRandom();
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}
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}
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/**
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* Create and return a default key manager. The default is the JessieX509
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* algorithm, loaded from either the jssecerts file, or the cacerts file.
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*
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* @return The default key manager instance.
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* @throws KeyManagementException If the instance cannot be created.
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*/
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private X509ExtendedKeyManager defaultKeyManager() throws KeyManagementException
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{
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KeyManagerFactory fact = null;
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try
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{
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fact = KeyManagerFactory.getInstance("JessieX509", "Jessie");
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}
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catch (NoSuchAlgorithmException nsae)
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{
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throw new KeyManagementException(nsae);
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}
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catch (NoSuchProviderException nspe)
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{
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throw new KeyManagementException(nspe);
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}
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try
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{
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fact.init(null, null);
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return (X509ExtendedKeyManager) fact.getKeyManagers()[0];
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}
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catch (NoSuchAlgorithmException nsae) { }
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catch (KeyStoreException kse) { }
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catch (UnrecoverableKeyException uke) { }
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catch (IllegalStateException ise) { }
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try
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{
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fact.init(new NullManagerParameters());
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return (X509ExtendedKeyManager) fact.getKeyManagers()[0];
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}
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catch (Exception shouldNotHappen)
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{
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throw new Error(shouldNotHappen.toString());
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}
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}
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/**
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* Create and return a default trust manager. The default is the JessieX509
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* algorithm, loaded from either the jssecerts file, or the cacerts file.
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*
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* @return The default trust manager instance.
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* @throws KeyManagementException If the instance cannot be created.
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*/
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private X509TrustManager defaultTrustManager() throws KeyManagementException
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{
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try
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{
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TrustManagerFactory fact =
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TrustManagerFactory.getInstance("JessieX509", "Jessie");
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fact.init((KeyStore) null);
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return (X509TrustManager) fact.getTrustManagers()[0];
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}
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catch (NoSuchAlgorithmException nsae)
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{
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throw new KeyManagementException(nsae);
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}
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catch (NoSuchProviderException nspe)
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{
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throw new KeyManagementException(nspe);
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}
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catch (KeyStoreException kse)
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{
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throw new KeyManagementException(kse);
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}
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}
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/**
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* Create a default secure PRNG. This is defined as either the algorithm
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* given in the <code>gnu.javax.net.ssl.secureRandom</code> security
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* property, or Fortuna if that property is not set. If none of these
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* algorithms can be found, and instance created with the SecureRandom
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* constructor is returned.
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*
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* @return The default secure PRNG instance.
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*/
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private SecureRandom defaultRandom()
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{
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GetSecurityPropertyAction gspa
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= new GetSecurityPropertyAction("gnu.javax.net.ssl.secureRandom");
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String alg = AccessController.doPrivileged(gspa);
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if (alg == null)
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alg = "Fortuna";
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SecureRandom rand = null;
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try
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{
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rand = SecureRandom.getInstance(alg);
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}
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catch (NoSuchAlgorithmException nsae)
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{
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rand = new SecureRandom();
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}
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return rand;
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}
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}
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