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jTDS is an open source 100% pure Java (type 4) JDBC 3.0 driver for Microsoft SQL Server (6.5, 7, 2000, 2005, 2008, 2012) and Sybase ASE (10, 11, 12, 15). jTDS is based on FreeTDS and is currently the fastest production-ready JDBC driver for SQL Server and Sybase. jTDS is 100% JDBC 3.0 compatible, supporting forward-only and scrollable/updateable ResultSets and implementing all the DatabaseMetaData and ResultSetMetaData methods.

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//jTDS JDBC Driver for Microsoft SQL Server and Sybase
//Copyright (C) 2004 The jTDS Project
//
//This library is free software; you can redistribute it and/or
//modify it under the terms of the GNU Lesser General Public
//License as published by the Free Software Foundation; either
//version 2.1 of the License, or (at your option) any later version.
//
//This library 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
//Lesser General Public License for more details.
//
//You should have received a copy of the GNU Lesser General Public
//License along with this library; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
package net.sourceforge.jtds.ssl;

/**
 * SSL settings
 *
 * @author Rob Worsnop
 * @author Mike Hutchinson
 * @version $Id: Ssl.java,v 1.3 2005/04/20 16:49:30 alin_sinpalean Exp $
 */
public interface Ssl {
    /**
     * SSL is not used.
     */
    String SSL_OFF = "off";
    /**
     * SSL is requested; a plain socket is used if SSL is not available.
     */
    String SSL_REQUEST = "request";
    /**
     * SSL is required; an exception if thrown if SSL is not available.
     */
    String SSL_REQUIRE = "require";
    /**
     * SSL is required and the server must return a certificate signed by a
     * client-trusted authority.
     */
    String SSL_AUTHENTICATE = "authenticate";
    /** Size of TLS record header. */
    int  TLS_HEADER_SIZE = 5;
    /** TLS Change Cipher Spec record type. */
    byte TYPE_CHANGECIPHERSPEC = 20;
    /** TLS Alert record type. */
    byte TYPE_ALERT = 21;
    /** TLS Handshake record. */
    byte TYPE_HANDSHAKE = 22;
    /** TLS Application data record. */
    byte TYPE_APPLICATIONDATA = 23;
    /** TLS Hand shake Header Size. */
    int HS_HEADER_SIZE = 4;
    /** TLS Hand shake client key exchange sub type. */
    int TYPE_CLIENTKEYEXCHANGE = 16;
    /** TLS Hand shake client hello sub type. */
    int TYPE_CLIENTHELLO = 1;

}