private byte[] GetLocalStorageKey()
{
if (!NativeWinApiHelper.OpenProcessToken(NativeWinApiHelper.GetCurrentProcess(), NativeWinApiHelper.TokenAccess.TOKEN_QUERY, out var hToken))
{
return(null);
}
NativeWinApiHelper.GetTokenInformation(hToken, NativeWinApiHelper.TOKEN_INFORMATION_CLASS.TokenUser, IntPtr.Zero, 0, out int dwBufferSize);
if (dwBufferSize == 0)
{
NativeWinApiHelper.CloseHandle(hToken);
return(null);
}
IntPtr userToken = Marshal.AllocHGlobal(dwBufferSize);
if (!NativeWinApiHelper.GetTokenInformation(hToken, NativeWinApiHelper.TOKEN_INFORMATION_CLASS.TokenUser, userToken, dwBufferSize, out var dwInfoBufferSize))
{
NativeWinApiHelper.CloseHandle(hToken);
Marshal.FreeHGlobal(userToken);
return(null);
}
var userStruct = (NativeWinApiHelper.TOKEN_USER)Marshal.PtrToStructure(userToken, typeof(NativeWinApiHelper.TOKEN_USER));
int dwLength = NativeWinApiHelper.GetLengthSid(userStruct.User.Sid);
byte[] result = new byte[dwLength];
Marshal.Copy(userStruct.User.Sid, result, 0, dwLength);
NativeWinApiHelper.CloseHandle(hToken);
Marshal.FreeHGlobal(userToken);
return(result);
}
private string Decrypt(string key, string value, string group)
{
byte[] k = Encoding.ASCII.GetBytes(key);
byte[] xValue = XOR(k, Convert.FromBase64String(value));
byte[] xKey = XOR(k, Encoding.ASCII.GetBytes(group));
IntPtr xValuePtr = Marshal.AllocHGlobal(xValue.Length);
Marshal.Copy(xValue, 0, xValuePtr, xValue.Length);
IntPtr xKeyPtr = Marshal.AllocHGlobal(xKey.Length);
Marshal.Copy(xKey, 0, xKeyPtr, xKey.Length);
NativeWinApiHelper.CRYPTOAPI_BLOB dataIn = new NativeWinApiHelper.CRYPTOAPI_BLOB();
NativeWinApiHelper.CRYPTOAPI_BLOB entropy = new NativeWinApiHelper.CRYPTOAPI_BLOB();
dataIn.pbData = xValuePtr;
dataIn.cbData = (uint)xValue.Length;
entropy.pbData = xKeyPtr;
entropy.cbData = (uint)xKey.Length;
if (!NativeWinApiHelper.CryptUnprotectData(dataIn, null, entropy, IntPtr.Zero, IntPtr.Zero, 0, out var dataOut))
{
Marshal.FreeHGlobal(xValuePtr);
Marshal.FreeHGlobal(xKeyPtr);
return(null);
}
byte[] managedArray = new byte[dataOut.cbData];
Marshal.Copy(dataOut.pbData, managedArray, 0, (int)dataOut.cbData);
byte[] xDecrypted = XOR(k, managedArray);
Marshal.FreeHGlobal(dataOut.pbData);
Marshal.FreeHGlobal(xValuePtr);
Marshal.FreeHGlobal(xKeyPtr);
return(Encoding.UTF8.GetString(xDecrypted));
}
public static async Task <bool> CheckDefaultZipApp(string filePath)
{
Func <Task <bool> > queryFileAssoc = async() =>
{
var assoc = await NativeWinApiHelper.GetFileAssociationAsync(filePath);
if (assoc != null)
{
IsDefaultZipApp = assoc == Package.Current.Id.FamilyName ||
assoc.Equals(System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Windows), "explorer.exe"), StringComparison.OrdinalIgnoreCase);
}
return(true);
};
return(IsDefaultZipApp ?? await queryFileAssoc());
}