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294 lines
9.3 KiB
Java
294 lines
9.3 KiB
Java
/* SSLContext.java -- an SSL protocol context.
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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.KeyManagementException;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.security.Provider;
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import java.security.SecureRandom;
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import java.security.Security;
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/**
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* A "meta-factory" for protocol-specific socket and server socket
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* factories. This class serves as a clearinghouse for socket
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* factories and cached session contexts for a particular protocol,
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* such as SSLv3.
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*
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* @author Casey Marshall (rsdio@metastatic.org)
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*/
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public class SSLContext
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{
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// Constants and fields.
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// ------------------------------------------------------------------
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/** Service name for SSL contexts. */
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private static final String SSL_CONTEXT = "SSLContext";
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/** The underlying engine. */
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private final SSLContextSpi ctxSpi;
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/** The provider of the engine class. */
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private final Provider provider;
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/** The protocal name. */
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private final String protocol;
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// Constructor.
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// ------------------------------------------------------------------
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/**
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* Create a new SSL context.
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*
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* @param ctxSpi The context engine.
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* @param provider The provider of the implementation.
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* @param protocol The name of the SSL protocol.
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*/
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protected SSLContext(SSLContextSpi ctxSpi, Provider provider,
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String protocol)
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{
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this.ctxSpi = ctxSpi;
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this.provider = provider;
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this.protocol = protocol;
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}
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/**
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* Get an instance of a context for the specified protocol from the first
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* provider that implements it.
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*
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* @param protocol The name of the protocol to get a context for.
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* @return The new context.
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* @throws NoSuchAlgorithmException If no provider implements the given
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* protocol.
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* @throws IllegalArgumentException if <code>protocol</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 SSLContext getInstance(String protocol)
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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(protocol, 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(protocol);
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}
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/**
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* Get an instance of a context for the specified protocol from the named
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* provider.
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*
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* @param protocol The name of the protocol to get a context for.
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* @param provider The name of the provider to get the implementation from.
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* @return The new context.
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* @throws NoSuchAlgorithmException If the provider does not implement the
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* given protocol.
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* @throws NoSuchProviderException If the named provider does not exist.
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* @throws IllegalArgumentException if either <code>protocol</code> or
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* <code>provider</code> is <code>null</code>, or if
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* <code>protocol</code> is an empty string.
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*/
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public static final SSLContext getInstance(String protocol, 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(protocol, p);
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}
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/**
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* Get an instance of a context for the specified protocol from the specified
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* provider.
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*
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* @param protocol The name of the protocol to get a context for.
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* @param provider The name of the provider to get the implementation from.
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* @return The new context.
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* @throws NoSuchAlgorithmException If the provider does not implement the
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* given protocol.
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* @throws IllegalArgumentException if either <code>protocol</code> or
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* <code>provider</code> is <code>null</code>, or if
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* <code>protocol</code> is an empty string.
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*/
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public static final SSLContext getInstance(String protocol, Provider provider)
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throws NoSuchAlgorithmException
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{
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StringBuilder sb = new StringBuilder("SSLContext for protocol [")
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.append(protocol).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(SSL_CONTEXT, protocol, provider);
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return new SSLContext((SSLContextSpi) spi, provider, protocol);
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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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* Creates a new {@link SSLEngine} for this context.
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*
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* @return The new SSLEngine.
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* @since 1.5
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*/
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public final SSLEngine createSSLEngine ()
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{
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return ctxSpi.engineCreateSSLEngine ();
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}
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/**
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* Creates a new {@link SSLEngine} for this context, with a given
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* host name and port number.
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*
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* @param host The local host name.
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* @param port The local port number.
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* @return The new SSLEngine.
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* @since 1.5
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*/
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public final SSLEngine createSSLEngine (final String host, final int port)
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{
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return ctxSpi.engineCreateSSLEngine (host, port);
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}
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/**
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* Returns the set of SSL contexts available for client connections.
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*
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* @return The set of SSL contexts available for client connections.
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*/
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public final SSLSessionContext getClientSessionContext()
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{
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return ctxSpi.engineGetClientSessionContext();
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}
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/**
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* Returns the protocol name of this context.
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*
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* @return The protocol name of this context.
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*/
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public final String getProtocol()
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{
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return protocol;
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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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* Returns the set of SSL contexts available for server connections.
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*
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* @return The set of SSL contexts available for server connections.
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*/
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public final SSLSessionContext getServerSessionContext()
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{
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return ctxSpi.engineGetServerSessionContext();
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}
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/**
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* Returns the factory for server SSL sockets.
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*
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* @return The factory for server SSL sockets.
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*/
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public final SSLServerSocketFactory getServerSocketFactory()
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{
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return ctxSpi.engineGetServerSocketFactory();
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}
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/**
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* Returns the factory for client SSL sockets.
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*
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* @return The factory for client SSL sockets.
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*/
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public final SSLSocketFactory getSocketFactory()
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{
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return ctxSpi.engineGetSocketFactory();
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}
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/**
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* Initializes this context and prepares it for producing socket
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* factories. All of the parameters are optional; default values are
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* used if left unspecified.
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*
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* @param keyManagers The set of key managers to use.
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* @param trustManagers The set of trust managers to use.
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* @param random A source of random bits to use.
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* @throws KeyManagementException If initialization fails.
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*/
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public final void init(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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ctxSpi.engineInit(keyManagers, trustManagers, random);
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}
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}
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