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Added DPAPI class
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ShareX.HelpersLib/Cryptographic/DPAPI.cs
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79
ShareX.HelpersLib/Cryptographic/DPAPI.cs
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#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (c) 2007-2020 ShareX Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System;
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using System.Security.Cryptography;
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using System.Text;
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namespace ShareX.HelpersLib
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{
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// https://en.wikipedia.org/wiki/Data_Protection_API
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public static class DPAPI
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{
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public static string Encrypt(string stringToEncrypt, string optionalEntropy = null, DataProtectionScope scope = DataProtectionScope.CurrentUser)
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{
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byte[] data = Encoding.UTF8.GetBytes(stringToEncrypt);
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return Encrypt(data, optionalEntropy, scope);
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}
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public static string Encrypt(byte[] data, string optionalEntropy = null, DataProtectionScope scope = DataProtectionScope.CurrentUser)
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{
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byte[] entropyData = null;
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if (optionalEntropy != null)
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{
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entropyData = Encoding.UTF8.GetBytes(optionalEntropy);
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}
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return Encrypt(data, entropyData, scope);
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}
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public static string Encrypt(byte[] data, byte[] optionalEntropy = null, DataProtectionScope scope = DataProtectionScope.CurrentUser)
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{
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byte[] encryptedData = ProtectedData.Protect(data, optionalEntropy, scope);
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return Convert.ToBase64String(encryptedData);
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}
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public static string Decrypt(string encryptedString, string optionalEntropy = null, DataProtectionScope scope = DataProtectionScope.CurrentUser)
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{
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byte[] encryptedData = Convert.FromBase64String(encryptedString);
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return Decrypt(encryptedData, optionalEntropy, scope);
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}
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public static string Decrypt(byte[] encryptedData, string optionalEntropy = null, DataProtectionScope scope = DataProtectionScope.CurrentUser)
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{
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byte[] entropyData = null;
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if (optionalEntropy != null)
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{
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entropyData = Encoding.UTF8.GetBytes(optionalEntropy);
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}
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return Decrypt(encryptedData, entropyData, scope);
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}
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public static string Decrypt(byte[] encryptedData, byte[] optionalEntropy = null, DataProtectionScope scope = DataProtectionScope.CurrentUser)
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{
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byte[] decryptedData = ProtectedData.Unprotect(encryptedData, optionalEntropy, scope);
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return Encoding.UTF8.GetString(decryptedData);
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}
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}
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}
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