apewer-dotnet/Apewer.Source/Externals/MySql.Data-6.9.11/MySqlClient/Authentication/Sha256AuthenticationPlugin.cs

#if MYSQL_6_9

// Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most 
// MySQL Connectors. There are special exceptions to the terms and 
// conditions of the GPLv2 as it is applied to this software, see the 
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program 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; version 2 of the License.
//
// 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., 
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA

//#define BOUNCY_CASTLE_INCLUDED

using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using Externals.MySql.Data.Common;
using Externals.MySql.Data.MySqlClient.Properties;

namespace Externals.MySql.Data.MySqlClient.Authentication
{
  /// <summary>
  /// The implementation of the sha256_password authentication plugin.
  /// </summary>
  internal class Sha256AuthenticationPlugin : MySqlAuthenticationPlugin
  {

    private byte[] rawPubkey;

    public override string PluginName
    {
      get { return "sha256_password"; }
    }

    protected override byte[] MoreData(byte[] data)
    {
      rawPubkey = data;
      byte[] buffer = GetPassword() as byte[];
      return buffer;
    }

    public override object GetPassword()
    {
      if (Settings.SslMode != MySqlSslMode.None)
      {
        // send as clear text, since the channel is already encrypted
        byte[] passBytes = this.Encoding.GetBytes(Settings.Password);
        byte[] buffer = new byte[passBytes.Length + 1];
        Array.Copy(passBytes, 0, buffer, 0, passBytes.Length);
        buffer[passBytes.Length] = 0;
        return buffer;
      }
      else
      {
        throw new NotImplementedException( "You can use sha256 plugin only in SSL connections in this implementation." );
      }
    }

  }
}


#endif