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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.net.ssl;
import java.io.IOException;
import java.net.Socket;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import javax.net.SocketFactory;
import org.apache.harmony.security.fortress.Services;
/**
* The abstract factory implementation to create {@code SSLSocket}s.
*/
public abstract class SSLSocketFactory extends SocketFactory {
// FIXME EXPORT CONTROL
// The default SSL socket factory
private static SocketFactory defaultSocketFactory;
private static int lastCacheVersion = -1;
/**
* Returns the default {@code SSLSocketFactory} instance. The default is
* defined by the security property {@code 'ssl.SocketFactory.provider'}.
*
* @return the default ssl socket factory instance.
*/
public static synchronized SocketFactory getDefault() {
int newCacheVersion = Services.getCacheVersion();
if (defaultSocketFactory != null && lastCacheVersion == newCacheVersion) {
return defaultSocketFactory;
}
lastCacheVersion = newCacheVersion;
String newName = Security.getProperty("ssl.SocketFactory.provider");
if (newName != null) {
/* The cache could have been invalidated, but the provider name didn't change. This
* will be the most common state, so check for it early without resetting the default
* SocketFactory.
*/
if (defaultSocketFactory != null) {
if (newName.equals(defaultSocketFactory.getClass().getName())) {
return defaultSocketFactory;
} else {
defaultSocketFactory = null;
}
}
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (cl == null) {
cl = ClassLoader.getSystemClassLoader();
}
try {
final Class<?> sfc = Class.forName(newName, true, cl);
defaultSocketFactory = (SocketFactory) sfc.newInstance();
} catch (Exception e) {
System.logW("Could not create " + newName + " with ClassLoader "
+ cl.toString() + ": " + e.getMessage());
}
} else {
defaultSocketFactory = null;
}
if (defaultSocketFactory == null) {
SSLContext context;
try {
context = SSLContext.getDefault();
} catch (NoSuchAlgorithmException e) {
context = null;
}
if (context != null) {
defaultSocketFactory = context.getSocketFactory();
}
}
if (defaultSocketFactory == null) {
// Use internal implementation
defaultSocketFactory = new DefaultSSLSocketFactory("No SSLSocketFactory installed");
}
return defaultSocketFactory;
}
/**
* Creates a new {@code SSLSocketFactory}.
*/
public SSLSocketFactory() {
}
/**
* Returns the names of the cipher suites that are enabled by default.
*
* @return the names of the cipher suites that are enabled by default.
*/
public abstract String[] getDefaultCipherSuites();
/**
* Returns the names of the cipher suites that are supported and could be
* enabled for an SSL connection.
*
* @return the names of the cipher suites that are supported.
*/
public abstract String[] getSupportedCipherSuites();
/**
* Creates an {@code SSLSocket} over the specified socket that is connected
* to the specified host at the specified port.
*
* @param s
* the socket.
* @param host
* the host.
* @param port
* the port number.
* @param autoClose
* {@code true} if socket {@code s} should be closed when the
* created socket is closed, {@code false} if the socket
* {@code s} should be left open.
* @return the creates ssl socket.
* @throws IOException
* if creating the socket fails.
* @throws java.net.UnknownHostException
* if the host is unknown.
*/
public abstract Socket createSocket(Socket s, String host, int port, boolean autoClose)
throws IOException;
}
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