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77 lines
2.9 KiB
77 lines
2.9 KiB
// Copyright © 2018, Oracle and/or its affiliates. All rights reserved.
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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, version 2.0, as
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// published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an
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// additional permission to link the program and your derivative works
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// with the separately licensed software that they have included with
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// MySQL.
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//
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// Without limiting anything contained in the foregoing, this file,
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// which is part of MySQL Connector/NET, is also subject to the
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// Universal FOSS Exception, version 1.0, a copy of which can be found at
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// http://oss.oracle.com/licenses/universal-foss-exception.
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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
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along 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.Collections.Generic;
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using System.Security.Cryptography;
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using System.Text;
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using Sog.Properties;
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namespace MySql.Data.MySqlClient.Authentication
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{
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internal class Sha256MemoryAuthenticationPlugin : MySqlAuthenticationPlugin
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{
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public override string PluginName => "SHA256_MEMORY";
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public byte[] GetClientHash(string data, byte[] nonce)
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{
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if (string.IsNullOrEmpty(data))
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{
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return new byte[0];
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}
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SHA256 sha = SHA256.Create();
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byte[] dataBytes = Encoding.UTF8.GetBytes(data);
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byte[] firstHash = sha.ComputeHash(dataBytes);
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byte[] secondHash = sha.ComputeHash(firstHash);
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byte[] thirdHash = new byte[secondHash.Length + nonce.Length];
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secondHash.CopyTo(thirdHash, 0);
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nonce.CopyTo(thirdHash, secondHash.Length);
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thirdHash = sha.ComputeHash(thirdHash);
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byte[] xor = this.GetXOr(thirdHash, firstHash);
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return Encoding.UTF8.GetBytes(BitConverter.ToString(xor).Replace("-", ""));
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}
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protected byte[] GetXOr(byte[] left, byte[] right)
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{
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if (left.Length != right.Length)
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{
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throw new ArrayTypeMismatchException();
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}
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byte[] result = new byte[left.Length];
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for (int i = 0; i < left.Length; i++)
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{
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result[i] = (byte)(left[i] ^ right[i]);
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}
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return result;
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}
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}
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}
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