87 lines
3.5 KiB
C#
87 lines
3.5 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Security.Cryptography;
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[Singletone]
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public class PasswordHasher
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{
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public int Size { get; private set; }
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public int Iterations { get; private set; }
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public string Salt { get; private set; }
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public PasswordHasher(IConfiguration configuration, MachinePseudoKeys machinePseudoKeys)
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{
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if (!int.TryParse(configuration["core:password:size"], out var size))
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{
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size = 256;
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}
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Size = size;
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if (!int.TryParse(configuration["core.password.iterations"], out var iterations))
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{
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iterations = 100000;
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}
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Iterations = iterations;
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Salt = (configuration["core:password:salt"] ?? "").Trim();
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if (string.IsNullOrEmpty(Salt))
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{
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var salt = Hasher.Hash("{9450BEF7-7D9F-4E4F-A18A-971D8681722D}", HashAlg.SHA256);
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var PasswordHashSaltBytes = KeyDerivation.Pbkdf2(
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Encoding.UTF8.GetString(machinePseudoKeys.GetMachineConstant()),
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salt,
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KeyDerivationPrf.HMACSHA256,
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Iterations,
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Size / 8);
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Salt = BitConverter.ToString(PasswordHashSaltBytes).Replace("-", string.Empty).ToLower();
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}
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}
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public string GetClientPassword(string password)
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{
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if (string.IsNullOrWhiteSpace(password))
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{
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password = Guid.NewGuid().ToString();
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}
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var salt = new UTF8Encoding(false).GetBytes(Salt);
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var hashBytes = KeyDerivation.Pbkdf2(
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password,
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salt,
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KeyDerivationPrf.HMACSHA256,
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Iterations,
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Size / 8);
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var hash = BitConverter.ToString(hashBytes).Replace("-", string.Empty).ToLower();
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return hash;
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}
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} |