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+/* SSLContext.java -- an SSL protocol context.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.net.ssl;
+
+import gnu.java.security.Engine;
+
+import java.lang.reflect.InvocationTargetException;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.Provider;
+import java.security.SecureRandom;
+import java.security.Security;
+
+/**
+ * A "meta-factory" for protocol-specific socket and server socket
+ * factories. This class serves as a clearinghouse for socket
+ * factories and cached session contexts for a particular protocol,
+ * such as SSLv3.
+ *
+ * @author Casey Marshall (rsdio@metastatic.org)
+ */
+public class SSLContext
+{
+ // Constants and fields.
+ // ------------------------------------------------------------------
+
+ /** Service name for SSL contexts. */
+ private static final String SSL_CONTEXT = "SSLContext";
+
+ /** The underlying engine. */
+ private final SSLContextSpi ctxSpi;
+
+ /** The provider of the engine class. */
+ private final Provider provider;
+
+ /** The protocal name. */
+ private final String protocol;
+
+ // Constructor.
+ // ------------------------------------------------------------------
+
+ /**
+ * Create a new SSL context.
+ *
+ * @param ctxSpi The context engine.
+ * @param provider The provider of the implementation.
+ * @param protocol The name of the SSL protocol.
+ */
+ protected SSLContext(SSLContextSpi ctxSpi, Provider provider,
+ String protocol)
+ {
+ this.ctxSpi = ctxSpi;
+ this.provider = provider;
+ this.protocol = protocol;
+ }
+
+ /**
+ * Get an instance of a context for the specified protocol from the first
+ * provider that implements it.
+ *
+ * @param protocol The name of the protocol to get a context for.
+ * @return The new context.
+ * @throws NoSuchAlgorithmException If no provider implements the given
+ * protocol.
+ * @throws IllegalArgumentException if <code>protocol</code> is
+ * <code>null</code> or is an empty string.
+ */
+ public static final SSLContext getInstance(String protocol)
+ throws NoSuchAlgorithmException
+ {
+ Provider[] p = Security.getProviders();
+ NoSuchAlgorithmException lastException = null;
+ for (int i = 0; i < p.length; i++)
+ try
+ {
+ return getInstance(protocol, p[i]);
+ }
+ catch (NoSuchAlgorithmException x)
+ {
+ lastException = x;
+ }
+ if (lastException != null)
+ throw lastException;
+ throw new NoSuchAlgorithmException(protocol);
+ }
+
+ /**
+ * Get an instance of a context for the specified protocol from the named
+ * provider.
+ *
+ * @param protocol The name of the protocol to get a context for.
+ * @param provider The name of the provider to get the implementation from.
+ * @return The new context.
+ * @throws NoSuchAlgorithmException If the provider does not implement the
+ * given protocol.
+ * @throws NoSuchProviderException If the named provider does not exist.
+ * @throws IllegalArgumentException if either <code>protocol</code> or
+ * <code>provider</code> is <code>null</code>, or if
+ * <code>protocol</code> is an empty string.
+ */
+ public static final SSLContext getInstance(String protocol, String provider)
+ throws NoSuchAlgorithmException, NoSuchProviderException
+ {
+ if (provider == null)
+ throw new IllegalArgumentException("provider MUST NOT be null");
+ Provider p = Security.getProvider(provider);
+ if (p == null)
+ throw new NoSuchProviderException(provider);
+ return getInstance(protocol, p);
+ }
+
+ /**
+ * Get an instance of a context for the specified protocol from the specified
+ * provider.
+ *
+ * @param protocol The name of the protocol to get a context for.
+ * @param provider The name of the provider to get the implementation from.
+ * @return The new context.
+ * @throws NoSuchAlgorithmException If the provider does not implement the
+ * given protocol.
+ * @throws IllegalArgumentException if either <code>protocol</code> or
+ * <code>provider</code> is <code>null</code>, or if
+ * <code>protocol</code> is an empty string.
+ */
+ public static final SSLContext getInstance(String protocol, Provider provider)
+ throws NoSuchAlgorithmException
+ {
+ StringBuilder sb = new StringBuilder("SSLContext for protocol [")
+ .append(protocol).append("] from provider[")
+ .append(provider).append("] could not be created");
+ Throwable cause;
+ try
+ {
+ Object spi = Engine.getInstance(SSL_CONTEXT, protocol, provider);
+ return new SSLContext((SSLContextSpi) spi, provider, protocol);
+ }
+ catch (InvocationTargetException x)
+ {
+ cause = x.getCause();
+ if (cause instanceof NoSuchAlgorithmException)
+ throw (NoSuchAlgorithmException) cause;
+ if (cause == null)
+ cause = x;
+ }
+ catch (ClassCastException x)
+ {
+ cause = x;
+ }
+ NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString());
+ x.initCause(cause);
+ throw x;
+ }
+
+ /**
+ * Creates a new {@link SSLEngine} for this context.
+ *
+ * @return The new SSLEngine.
+ * @since 1.5
+ */
+ public final SSLEngine createSSLEngine ()
+ {
+ return ctxSpi.engineCreateSSLEngine ();
+ }
+
+ /**
+ * Creates a new {@link SSLEngine} for this context, with a given
+ * host name and port number.
+ *
+ * @param host The local host name.
+ * @param port The local port number.
+ * @return The new SSLEngine.
+ * @since 1.5
+ */
+ public final SSLEngine createSSLEngine (final String host, final int port)
+ {
+ return ctxSpi.engineCreateSSLEngine (host, port);
+ }
+
+ /**
+ * Returns the set of SSL contexts available for client connections.
+ *
+ * @return The set of SSL contexts available for client connections.
+ */
+ public final SSLSessionContext getClientSessionContext()
+ {
+ return ctxSpi.engineGetClientSessionContext();
+ }
+
+ /**
+ * Returns the protocol name of this context.
+ *
+ * @return The protocol name of this context.
+ */
+ public final String getProtocol()
+ {
+ return protocol;
+ }
+
+ /**
+ * Returns the provider of this implementation.
+ *
+ * @return The provider of this implementation.
+ */
+ public final Provider getProvider()
+ {
+ return provider;
+ }
+
+ /**
+ * Returns the set of SSL contexts available for server connections.
+ *
+ * @return The set of SSL contexts available for server connections.
+ */
+ public final SSLSessionContext getServerSessionContext()
+ {
+ return ctxSpi.engineGetServerSessionContext();
+ }
+
+ /**
+ * Returns the factory for server SSL sockets.
+ *
+ * @return The factory for server SSL sockets.
+ */
+ public final SSLServerSocketFactory getServerSocketFactory()
+ {
+ return ctxSpi.engineGetServerSocketFactory();
+ }
+
+ /**
+ * Returns the factory for client SSL sockets.
+ *
+ * @return The factory for client SSL sockets.
+ */
+ public final SSLSocketFactory getSocketFactory()
+ {
+ return ctxSpi.engineGetSocketFactory();
+ }
+
+ /**
+ * Initializes this context and prepares it for producing socket
+ * factories. All of the parameters are optional; default values are
+ * used if left unspecified.
+ *
+ * @param keyManagers The set of key managers to use.
+ * @param trustManagers The set of trust managers to use.
+ * @param random A source of random bits to use.
+ * @throws KeyManagementException If initialization fails.
+ */
+ public final void init(KeyManager[] keyManagers,
+ TrustManager[] trustManagers,
+ SecureRandom random)
+ throws KeyManagementException
+ {
+ ctxSpi.engineInit(keyManagers, trustManagers, random);
+ }
+}