exportcontrolled.java

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/*
      Copyright (C) 2002-2004 MySQL AB

      This program is free software; you can redistribute it and/or modify
      it under the terms of version 2 of the GNU General Public License as 
      published by the Free Software Foundation.

      There are special exceptions to the terms and conditions of the GPL 
      as it is applied to this software. View the full text of the 
      exception in file EXCEPTIONS-CONNECTOR-J in the directory of this 
      software distribution.

      This program 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 this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



 */
package com.mysql.jdbc;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;

/**
 * Holds functionality that falls under export-control regulations.
 * 
 * @author Mark Matthews
 * 
 * @version $Id: ExportControlled.java,v 1.1.2.7 2004/08/12 20:28:30 mmatthew Exp $
 */
public class ExportControlled {
    private ExportControlled() { /* prevent instantiation */
    }

    protected static boolean enabled() {
        // we may wish to un-static-ify this class 
        // this static method call may be removed entirely by the compiler
        return true;
    }

    /**
     * Converts the socket being used in the given MysqlIO to 
     * an SSLSocket by performing the SSL/TLS handshake.
     * 
     * @param mysqlIO the MysqlIO instance containing the socket
     * to convert to an SSLSocket.
     * 
     * @throws CommunicationsException if the handshake fails, or
     * if this distribution of Connector/J doesn't contain the SSL
     * crytpo hooks needed to perform the handshake.
     */
    protected static void transformSocketToSSLSocket(MysqlIO mysqlIO)
            throws CommunicationsException {
        javax.net.ssl.SSLSocketFactory sslFact = (javax.net.ssl.SSLSocketFactory) javax.net.ssl.SSLSocketFactory
                .getDefault();

        try {
            mysqlIO.mysqlConnection = sslFact.createSocket(
                    mysqlIO.mysqlConnection, mysqlIO.host, mysqlIO.port, true);

            // need to force TLSv1, or else JSSE tries to do a SSLv2 handshake
            // which MySQL doesn't understand
            ((javax.net.ssl.SSLSocket) mysqlIO.mysqlConnection)
                    .setEnabledProtocols(new String[] { "TLSv1" }); //$NON-NLS-1$
            ((javax.net.ssl.SSLSocket) mysqlIO.mysqlConnection)
                    .startHandshake();
            
            if (mysqlIO.connection.getUseUnbufferedInput()) {
            	 mysqlIO.mysqlInput = 
                        mysqlIO.mysqlConnection.getInputStream();
            } else {
            	mysqlIO.mysqlInput = new BufferedInputStream(
                    mysqlIO.mysqlConnection.getInputStream(), 16384);
            }
            
            mysqlIO.mysqlOutput = new BufferedOutputStream(
                   mysqlIO.mysqlConnection.getOutputStream(), 16384);

            
            mysqlIO.mysqlOutput.flush();
        } catch (IOException ioEx) {
            throw new CommunicationsException(mysqlIO.connection,
                    mysqlIO.lastPacketSentTimeMs, ioEx);
        }
    }
}