157 lines
4.7 KiB
C#
157 lines
4.7 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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public static class Hasher
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{
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private const HashAlg DefaultAlg = HashAlg.SHA256;
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public static byte[] Hash(string data, HashAlg hashAlg)
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{
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return ComputeHash(data, hashAlg);
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}
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public static byte[] Hash(string data)
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{
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return Hash(data, DefaultAlg);
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}
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public static byte[] Hash(byte[] data, HashAlg hashAlg)
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{
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return ComputeHash(data, hashAlg);
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}
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public static byte[] Hash(byte[] data)
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{
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return Hash(data, DefaultAlg);
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}
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public static string Base64Hash(string data, HashAlg hashAlg)
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{
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return ComputeHash64(data, hashAlg);
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}
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public static string Base64Hash(string data)
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{
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return Base64Hash(data, DefaultAlg);
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}
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public static string Base64Hash(byte[] data, HashAlg hashAlg)
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{
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return ComputeHash64(data, hashAlg);
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}
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public static string Base64Hash(byte[] data)
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{
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return Base64Hash(data, DefaultAlg);
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}
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public static bool EqualHash(byte[] dataToCompare, byte[] hash)
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{
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return EqualHash(dataToCompare, hash, DefaultAlg);
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}
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public static bool EqualHash(string dataToCompare, string hash, HashAlg hashAlg)
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{
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return EqualHash(S2B(dataToCompare), S642B(hash), hashAlg);
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}
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public static bool EqualHash(string dataToCompare, string hash)
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{
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return EqualHash(dataToCompare, hash, DefaultAlg);
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}
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public static bool EqualHash(byte[] dataToCompare, byte[] hash, HashAlg hashAlg)
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{
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return string.Equals(
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ComputeHash64(dataToCompare, hashAlg),
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B2S64(hash)
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);
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}
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private static HashAlgorithm GetAlg(HashAlg hashAlg)
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{
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return hashAlg switch
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{
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HashAlg.MD5 => MD5.Create(),
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HashAlg.SHA1 => SHA1.Create(),
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HashAlg.SHA256 => SHA256.Create(),
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HashAlg.SHA512 => SHA512.Create(),
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_ => SHA256.Create()
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};
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}
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private static byte[] S2B(string str)
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{
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ArgumentNullException.ThrowIfNull(str);
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return Encoding.UTF8.GetBytes(str);
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}
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private static string B2S(byte[] data)
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{
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ArgumentNullException.ThrowIfNull(data);
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return Encoding.UTF8.GetString(data);
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}
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private static byte[] S642B(string str)
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{
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ArgumentNullException.ThrowIfNull(str);
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return Convert.FromBase64String(str);
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}
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private static string B2S64(byte[] data)
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{
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ArgumentNullException.ThrowIfNull(data);
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return Convert.ToBase64String(data);
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}
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private static byte[] ComputeHash(byte[] data, HashAlg hashAlg)
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{
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using var alg = GetAlg(hashAlg);
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return alg.ComputeHash(data);
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}
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private static byte[] ComputeHash(string data, HashAlg hashAlg)
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{
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return ComputeHash(S2B(data), hashAlg);
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}
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private static string ComputeHash64(byte[] data, HashAlg hashAlg)
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{
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return B2S64(ComputeHash(data, hashAlg));
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}
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private static string ComputeHash64(string data, HashAlg hashAlg)
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{
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return ComputeHash64(S2B(data), hashAlg);
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}
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} |