87 lines
3.2 KiB
C#
87 lines
3.2 KiB
C#
/*
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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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namespace ASC.Common.Utils;
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[Singletone]
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public class Signature
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{
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private readonly MachinePseudoKeys _machinePseudoKeys;
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public Signature(MachinePseudoKeys machinePseudoKeys)
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{
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_machinePseudoKeys = machinePseudoKeys;
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}
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public string Create<T>(T obj)
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{
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return Create(obj, Encoding.UTF8.GetString(_machinePseudoKeys.GetMachineConstant()));
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}
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public static string Create<T>(T obj, string secret)
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{
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var str = JsonConvert.SerializeObject(obj);
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var payload = GetHashBase64(str + secret) + "?" + str;
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return WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(payload));
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}
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public T Read<T>(string signature)
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{
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return Read<T>(signature, Encoding.UTF8.GetString(_machinePseudoKeys.GetMachineConstant()));
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}
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public static T Read<T>(string signature, string secret)
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{
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try
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{
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var rightSignature = signature.Replace("\"", "");
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var payloadParts = Encoding.UTF8.GetString(WebEncoders.Base64UrlDecode(rightSignature)).Split('?');
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if (GetHashBase64(payloadParts[1] + secret) == payloadParts[0])
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{
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return JsonConvert.DeserializeObject<T>(payloadParts[1]); //Sig correct
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}
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}
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catch (Exception) { }
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return default;
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}
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private static string GetHashBase64(string str)
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{
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using var sha256 = SHA256.Create();
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return Convert.ToBase64String(sha256.ComputeHash(Encoding.UTF8.GetBytes(str)));
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}
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private static string GetHashBase64MD5(string str)
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{
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using var md5 = MD5.Create();
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return Convert.ToBase64String(md5.ComputeHash(Encoding.UTF8.GetBytes(str)));
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}
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}
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