73 lines
3.0 KiB
C#
73 lines
3.0 KiB
C#
/*
|
|
*
|
|
* (c) Copyright Ascensio System Limited 2010-2018
|
|
*
|
|
* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
|
|
* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
|
|
* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
|
|
* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
|
|
*
|
|
* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
|
|
* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
|
|
*
|
|
* You can contact Ascensio System SIA by email at sales@onlyoffice.com
|
|
*
|
|
* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
|
|
* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
|
|
*
|
|
* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
|
|
* relevant author attributions when distributing the software. If the display of the logo in its graphic
|
|
* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
|
|
* in every copy of the program you distribute.
|
|
* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
|
|
*
|
|
*/
|
|
|
|
namespace ASC.Security.Cryptography;
|
|
|
|
[Singletone]
|
|
public class InstanceCrypto
|
|
{
|
|
private readonly byte[] _eKey;
|
|
|
|
public InstanceCrypto(MachinePseudoKeys machinePseudoKeys) =>
|
|
_eKey = machinePseudoKeys.GetMachineConstant(32);
|
|
|
|
public string Encrypt(string data) =>
|
|
Convert.ToBase64String(Encrypt(Encoding.UTF8.GetBytes(data)));
|
|
|
|
public byte[] Encrypt(byte[] data)
|
|
{
|
|
using var hasher = Aes.Create();
|
|
hasher.Key = _eKey;
|
|
hasher.IV = new byte[hasher.BlockSize >> 3];
|
|
|
|
using var ms = new MemoryStream();
|
|
using var ss = new CryptoStream(ms, hasher.CreateEncryptor(), CryptoStreamMode.Write);
|
|
using var plainTextStream = new MemoryStream(data);
|
|
|
|
plainTextStream.CopyTo(ss);
|
|
ss.FlushFinalBlock();
|
|
hasher.Clear();
|
|
|
|
return ms.ToArray();
|
|
}
|
|
|
|
public string Decrypt(string data) => Decrypt(Convert.FromBase64String(data));
|
|
|
|
public string Decrypt(byte[] data)
|
|
{
|
|
using var hasher = Aes.Create();
|
|
hasher.Key = _eKey;
|
|
hasher.IV = new byte[hasher.BlockSize >> 3];
|
|
|
|
using var msDecrypt = new MemoryStream(data);
|
|
using var csDecrypt = new CryptoStream(msDecrypt, hasher.CreateDecryptor(), CryptoStreamMode.Read);
|
|
using var srDecrypt = new StreamReader(csDecrypt);
|
|
|
|
// Read the decrypted bytes from the decrypting stream
|
|
// and place them in a string.
|
|
return srDecrypt.ReadToEnd();
|
|
}
|
|
}
|