2019-05-15 14:56:09 +00:00
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/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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2022-02-03 15:26:44 +00:00
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namespace ASC.Security.Cryptography;
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2022-02-11 13:17:55 +00:00
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public static class Hasher
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2022-02-03 15:26:44 +00:00
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{
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private const HashAlg DefaultAlg = HashAlg.SHA256;
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2022-02-08 11:07:28 +00:00
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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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2022-02-03 15:26:44 +00:00
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2022-02-08 11:07:28 +00:00
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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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2022-02-03 15:26:44 +00:00
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2022-02-08 11:07:28 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-03 15:26:44 +00:00
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2022-02-08 11:07:28 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-03 15:26:44 +00:00
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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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2019-08-16 08:44:03 +00:00
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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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if (str == null)
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{
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throw new ArgumentNullException(nameof(str));
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}
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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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if (data == null)
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{
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throw new ArgumentNullException(nameof(data));
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}
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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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if (str == null)
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{
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throw new ArgumentNullException(nameof(str));
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}
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2022-02-03 15:26:44 +00:00
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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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2022-02-08 11:07:28 +00:00
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if (data == null)
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{
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throw new ArgumentNullException(nameof(data));
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}
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2022-02-03 15:26:44 +00:00
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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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2022-02-08 11:07:28 +00:00
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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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2022-02-03 15:26:44 +00:00
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2022-02-08 11:07:28 +00:00
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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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2022-02-03 15:26:44 +00:00
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2022-02-08 11:07:28 +00:00
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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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}
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