initial commit

2026-08-27 10:55:23 -06:00
commit d03dc0bce1
356 changed files with 18535 additions and 0 deletions
@@ -0,0 +1,48 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Intelix.Helper.Encrypted;
+
+public static class DpApi
+{
+	private static NativeMethods.CryptprotectPromptstruct Prompt = new NativeMethods.CryptprotectPromptstruct
+	{
+		cbSize = Marshal.SizeOf(typeof(NativeMethods.CryptprotectPromptstruct)),
+		dwPromptFlags = 0,
+		hwndApp = IntPtr.Zero,
+		szPrompt = null
+	};
+
+	public static byte[] Decrypt(byte[] bCipher)
+	{
+		NativeMethods.DataBlob pDataIn = default(NativeMethods.DataBlob);
+		NativeMethods.DataBlob pDataOut = default(NativeMethods.DataBlob);
+		NativeMethods.DataBlob pOptionalEntropy = default(NativeMethods.DataBlob);
+		string ppszDataDescr = string.Empty;
+		GCHandle gCHandle = GCHandle.Alloc(bCipher, GCHandleType.Pinned);
+		pDataIn.cbData = bCipher.Length;
+		pDataIn.pbData = gCHandle.AddrOfPinnedObject();
+		try
+		{
+			if (!NativeMethods.CryptUnprotectData(ref pDataIn, ref ppszDataDescr, ref pOptionalEntropy, IntPtr.Zero, ref Prompt, 0, ref pDataOut) || pDataOut.cbData == 0)
+			{
+				return null;
+			}
+			byte[] array = new byte[pDataOut.cbData];
+			Marshal.Copy(pDataOut.pbData, array, 0, pDataOut.cbData);
+			return array;
+		}
+		finally
+		{
+			gCHandle.Free();
+			if (pDataOut.pbData != IntPtr.Zero)
+			{
+				Marshal.FreeHGlobal(pDataOut.pbData);
+			}
+			if (pOptionalEntropy.pbData != IntPtr.Zero)
+			{
+				Marshal.FreeHGlobal(pOptionalEntropy.pbData);
+			}
+		}
+	}
+}