internal static void ImportExportEncryptedFileDirectoryRawCore(bool isExport, bool isFolder, Stream stream, string destinationPath, PathFormat pathFormat, bool overwriteHidden)
{
string destinationPathLp = Path.GetExtendedLengthPathCore(null, destinationPath, pathFormat, GetFullPathOptions.FullCheck | GetFullPathOptions.TrimEnd);
NativeMethods.EncryptedFileRawMode mode = isExport
? NativeMethods.EncryptedFileRawMode.CreateForExport
: NativeMethods.EncryptedFileRawMode.CreateForImport;
if (isFolder)
{
mode = mode | NativeMethods.EncryptedFileRawMode.CreateForDir;
}
if (overwriteHidden)
{
mode = mode | NativeMethods.EncryptedFileRawMode.OverwriteHidden;
}
// OpenEncryptedFileRaw()
// In the ANSI version of this function, the name is limited to 248 characters.
// To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path.
// 2015-08-02: MSDN does not confirm LongPath usage but a Unicode version of this function exists.
SafeEncryptedFileRawHandle context;
var lastError = NativeMethods.OpenEncryptedFileRaw(destinationPathLp, mode, out context);
try
{
if (lastError != Win32Errors.ERROR_SUCCESS)
{
NativeError.ThrowException(lastError, destinationPathLp);
}
lastError = isExport
? NativeMethods.ReadEncryptedFileRaw((pbData, pvCallbackContext, length) =>
{
try
{
var data = new byte[length];
Marshal.Copy(pbData, data, 0, (int)length);
stream.Write(data, 0, (int)length);
}
catch (Exception ex)
{
return(Marshal.GetHRForException(ex) & NativeMethods.OverflowExceptionBitShift);
}
return((int)Win32Errors.ERROR_SUCCESS);
}, IntPtr.Zero, context)
: NativeMethods.WriteEncryptedFileRaw((IntPtr pbData, IntPtr pvCallbackContext, ref uint length) =>
{
try
{
var data = new byte[length];
length = (uint)stream.Read(data, 0, (int)length);
if (length == 0)
{
return((int)Win32Errors.ERROR_SUCCESS);
}
Marshal.Copy(data, 0, pbData, (int)length);
}
catch (Exception ex)
{
return(Marshal.GetHRForException(ex) & NativeMethods.OverflowExceptionBitShift);
}
return((int)Win32Errors.ERROR_SUCCESS);
}, IntPtr.Zero, context);
if (lastError != Win32Errors.ERROR_SUCCESS)
{
NativeError.ThrowException(lastError, destinationPathLp);
}
}
finally
{
if (context != null)
{
context.Dispose();
}
}
}
internal static void ImportEncryptedFileRawCore(System.IO.Stream inputStream, string destinationFilePath, PathFormat pathFormat, NativeMethods.EncryptedFileRawMode mode)
{
string lpPath = Path.GetExtendedLengthPathCore(null, destinationFilePath, pathFormat, GetFullPathOptions.FullCheck | GetFullPathOptions.TrimEnd);
SafeEncryptedFileRawHandle context = null;
int errorCode = NativeMethods.OpenEncryptedFileRaw(lpPath, mode, out context);
try
{
if (errorCode != Win32Errors.ERROR_SUCCESS)
{
NativeError.ThrowException(errorCode, null, destinationFilePath);
}
errorCode = NativeMethods.WriteEncryptedFileRaw((IntPtr pbData, IntPtr pvCallbackContext, ref uint ulLength) =>
{
try
{
byte[] buffer = new byte[ulLength];
ulLength = (uint)inputStream.Read(buffer, 0, (int)ulLength);
if (ulLength == 0)
{
return((int)Win32Errors.ERROR_SUCCESS);
}
Marshal.Copy(buffer, 0, pbData, (int)ulLength);
}
catch (Exception ex)
{
return(Marshal.GetHRForException(ex));
}
return((int)Win32Errors.ERROR_SUCCESS);
}, IntPtr.Zero, context);
if (errorCode != Win32Errors.ERROR_SUCCESS)
{
NativeError.ThrowException(errorCode, null, destinationFilePath);
}
}
finally
{
if (context != null)
{
context.Dispose();
}
}
}