public static SafeFileHandle OpenDriver()
{
SafeFileHandle hDriver = DeviceApi.CreateFile(WIN32_ROOT_PREFIX,
0,
DeviceApi.FILE_SHARE_READ | DeviceApi.FILE_SHARE_WRITE,
IntPtr.Zero,
DeviceApi.OPEN_EXISTING,
0,
IntPtr.Zero);
if (hDriver.IsInvalid)
{
LoadDriver();
hDriver = DeviceApi.CreateFile(WIN32_ROOT_PREFIX,
0,
DeviceApi.FILE_SHARE_READ | DeviceApi.FILE_SHARE_WRITE,
IntPtr.Zero,
DeviceApi.OPEN_EXISTING,
0,
IntPtr.Zero);
if (hDriver.IsInvalid)
{
Win32Exception ex = new Win32Exception();
throw new TrueCryptException(TrueCryptException.ExceptionCause.DriverOpenFailed, ex.ErrorCode, ex.Message);
}
}
return(hDriver);
}
public static void Read(uint volume, Int64 address, uint length, byte[] data)
{
// try to open the current physical drive
SafeFileHandle hndl = DeviceApi.CreateFile(string.Format("\\\\.\\PhysicalDrive{0}", volume),
DeviceApi.GENERIC_READ,
DeviceApi.FILE_SHARE_READ | DeviceApi.FILE_SHARE_WRITE,
IntPtr.Zero,
DeviceApi.OPEN_EXISTING,
DeviceApi.FILE_ATTRIBUTE_READONLY,
IntPtr.Zero);
if (!hndl.IsInvalid)
{
// set the file pointer to the requested address
if (DeviceApi.SetFilePointerEx(hndl, address, IntPtr.Zero, DeviceApi.EMoveMethod.Begin))
{
// read the requested data from the physical drive
uint dummy;
if (!DeviceApi.ReadFile(hndl, data, length, out dummy, IntPtr.Zero))
{
throw new System.IO.IOException("\"ReadFile\" API call failed");
}
}
else
{
throw new System.IO.IOException("\"SetFilePointerEx\" API call failed");
}
hndl.Close();
}
}
