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98 lines
3.9 KiB
98 lines
3.9 KiB
#if MYSQL_6_10
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// Copyright ?2012, 2018, Oracle and/or its affiliates. All rights reserved.
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//
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// MySQL Connector/NET is licensed under the terms of the GPLv2
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// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
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// MySQL Connectors. There are special exceptions to the terms and
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// conditions of the GPLv2 as it is applied to this software, see the
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// FLOSS License Exception
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// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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//
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// This program 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
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// by the Free Software Foundation; version 2 of the License.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System;
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using System.Security.Cryptography;
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namespace Externals.MySql.Data.MySqlClient.Authentication
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{
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/// <summary>
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/// Allows connections to a user account set with the mysql_native_password authentication plugin.
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/// </summary>
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internal class MySqlNativePasswordPlugin : MySqlAuthenticationPlugin
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{
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public override string PluginName => "mysql_native_password";
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protected override void SetAuthData(byte[] data)
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{
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// if the data given to us is a null terminated string, we need to trim off the trailing zero
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if (data[data.Length - 1] == 0)
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{
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byte[] b = new byte[data.Length - 1];
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Buffer.BlockCopy(data, 0, b, 0, data.Length - 1);
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base.SetAuthData(b);
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}
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else
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base.SetAuthData(data);
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}
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protected override byte[] MoreData(byte[] data)
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{
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byte[] passBytes = (GetPassword() ?? new byte[1]) as byte[];
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byte[] buffer = new byte[passBytes.Length - 1];
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Array.Copy(passBytes, 1, buffer, 0, passBytes.Length - 1);
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return buffer;
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}
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public override object GetPassword()
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{
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byte[] bytes = Get411Password(Settings.Password, AuthenticationData);
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if (bytes != null && bytes.Length == 1 && bytes[0] == 0) return null;
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return bytes;
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}
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/// <summary>
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/// Returns a byte array containing the proper encryption of the
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/// given password/seed according to the new 4.1.1 authentication scheme.
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/// </summary>
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/// <param name="password"></param>
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/// <param name="seedBytes"></param>
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/// <returns></returns>
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protected byte[] Get411Password(string password, byte[] seedBytes)
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{
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// if we have no password, then we just return 1 zero byte
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if (password.Length == 0) return new byte[1];
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//SHA1 sha = new SHA1CryptoServiceProvider();
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SHA1 sha = SHA1.Create();
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byte[] firstHash = sha.ComputeHash(this.Encoding.GetBytes(password));
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byte[] secondHash = sha.ComputeHash(firstHash);
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byte[] input = new byte[seedBytes.Length + secondHash.Length];
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Array.Copy(seedBytes, 0, input, 0, seedBytes.Length);
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Array.Copy(secondHash, 0, input, seedBytes.Length, secondHash.Length);
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byte[] thirdHash = sha.ComputeHash(input);
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byte[] finalHash = new byte[thirdHash.Length + 1];
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finalHash[0] = 0x14;
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Array.Copy(thirdHash, 0, finalHash, 1, thirdHash.Length);
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for (int i = 1; i < finalHash.Length; i++)
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finalHash[i] = (byte)(finalHash[i] ^ firstHash[i - 1]);
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return finalHash;
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}
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}
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}
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#endif
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