Exemple #1
0
        public void Create(ulong driveSize)
        {
            Header = new VhdFooter();
            Header.InitDefaults();
            Header.OrigSize = driveSize.EndianSwap();
            Header.CurSize = driveSize.EndianSwap();

            DynamicDiskHeader = new VhdDynamicDiskHeader();
            DynamicDiskHeader.InitDefaults();

            var batEntryCount = (uint)(driveSize/DynamicDiskHeader.BlockSize.EndianSwap());
            BlockAllocationTable = new uint[(int) batEntryCount];
            for (uint i = 0; i < batEntryCount; i++)
                BlockAllocationTable[i] = 0xFFFFFFFF;

            DynamicDiskHeader.MaxTableEntries = batEntryCount.EndianSwap();

            Header.CalculateChecksum();
            DynamicDiskHeader.CalculateChecksum();
        }
Exemple #2
0
        public void Create(ulong driveSize)
        {
            Header = new VhdFooter();
            Header.InitDefaults();
            Header.OrigSize = driveSize.EndianSwap();
            Header.CurSize  = driveSize.EndianSwap();

            DynamicDiskHeader = new VhdDynamicDiskHeader();
            DynamicDiskHeader.InitDefaults();


            var batEntryCount = (uint)(driveSize / DynamicDiskHeader.BlockSize.EndianSwap());

            BlockAllocationTable = new uint[(int)batEntryCount];
            for (uint i = 0; i < batEntryCount; i++)
            {
                BlockAllocationTable[i] = 0xFFFFFFFF;
            }

            DynamicDiskHeader.MaxTableEntries = batEntryCount.EndianSwap();

            Header.CalculateChecksum();
            DynamicDiskHeader.CalculateChecksum();
        }
Exemple #3
0
        public bool ConvertToVhd(string destFile)
        {
            if (IsEncrypted)
                return false;

            // xvd -> vhd conversion just needs the FS data extracted with a vhd footer put at the end
            // seems to work for older OS XVDs, newer XVCs use a 4k sector size though and windows VHD driver doesn't like it, not sure what new OS XVDs use
            // todo: look into converting 4k sectors to 512

            using(var vhdFile = new IO(destFile, FileMode.Create))
            {
                _io.Stream.Position = (long)DataOffset;

                if (IsXvcFile) // if it's an XVC file then find the correct XVC data offset
                {
                    bool foundFs = false;
                    foreach (var hdr in RegionHeaders)
                    {
                        if (hdr.Description == "FS-MD" || hdr.Id == 0x40000002)
                        {
                            foundFs = true;
                            _io.Stream.Position = (long)hdr.Offset;
                            break;
                        }
                    }
                    if (!foundFs)
                    { // no FS-MD in the file, older XVCs seem to use the last region for it
                        _io.Stream.Position = (long)RegionHeaders[RegionHeaders.Count - 1].Offset;
                    }
                }

                vhdFile.Stream.Position = 0;
                var driveSize = (long)Header.DriveSize;

                while (_io.Stream.Length > _io.Stream.Position)
                {
                    long toRead = 0x4000;
                    if (_io.Stream.Position + toRead > _io.Stream.Length)
                        toRead = _io.Stream.Length - _io.Stream.Position;

                    byte[] data = _io.Reader.ReadBytes((int) toRead);
                    vhdFile.Writer.Write(data);
                }

                vhdFile.Stream.Position = driveSize;

                var footer = new VhdFooter();
                footer.InitDefaults();
                footer.OrigSize = ((ulong) driveSize).EndianSwap();
                footer.CurSize = footer.OrigSize;
                footer.UniqueId = Header.VDUID;

                // don't need to calculate these
                footer.DiskGeometryHeads = 0;
                footer.DiskGeometrySectors = 0;
                footer.DiskGeometryCylinders = 0;
                footer.TimeStamp = 0;

                footer.CalculateChecksum();

                vhdFile.Writer.WriteStruct(footer);
            }
            if (DisableNativeFunctions)
                return true;

            // make sure NTFS compression is disabled on the vhd

            int lpBytesReturned = 0;
            // ReSharper disable InconsistentNaming
            const int FSCTL_SET_COMPRESSION = 0x9C040;
            short COMPRESSION_FORMAT_NONE = 0;
            // ReSharper restore InconsistentNaming

            using (FileStream f = File.Open(destFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None))
            {
            #pragma warning disable 618
                Natives.DeviceIoControl(f.Handle, FSCTL_SET_COMPRESSION,
            #pragma warning restore 618
                    ref COMPRESSION_FORMAT_NONE, 2 /*sizeof(short)*/, IntPtr.Zero, 0,
                    ref lpBytesReturned, IntPtr.Zero);
            }

            return true;
        }
Exemple #4
0
        public bool ConvertToVhd(string destFile)
        {
            if (IsEncrypted)
            {
                return(false);
            }

            // xvd -> vhd conversion just needs the FS data extracted with a vhd footer put at the end
            // seems to work for older OS XVDs, newer XVCs use a 4k sector size though and windows VHD driver doesn't like it, not sure what new OS XVDs use
            // todo: look into converting 4k sectors to 512

            using (var vhdFile = new IO(destFile, FileMode.Create))
            {
                _io.Stream.Position = (long)DataOffset;

                if (IsXvcFile) // if it's an XVC file then find the correct XVC data offset
                {
                    bool foundFs = false;
                    foreach (var hdr in RegionHeaders)
                    {
                        if (hdr.Description == "FS-MD" || hdr.Id == 0x40000002)
                        {
                            foundFs             = true;
                            _io.Stream.Position = (long)hdr.Offset;
                            break;
                        }
                    }
                    if (!foundFs)
                    { // no FS-MD in the file, older XVCs seem to use the last region for it
                        _io.Stream.Position = (long)RegionHeaders[RegionHeaders.Count - 1].Offset;
                    }
                }

                vhdFile.Stream.Position = 0;
                var driveSize = (long)Header.DriveSize;

                while (_io.Stream.Length > _io.Stream.Position)
                {
                    long toRead = 0x4000;
                    if (_io.Stream.Position + toRead > _io.Stream.Length)
                    {
                        toRead = _io.Stream.Length - _io.Stream.Position;
                    }

                    byte[] data = _io.Reader.ReadBytes((int)toRead);
                    vhdFile.Writer.Write(data);
                }

                vhdFile.Stream.Position = driveSize;

                var footer = new VhdFooter();
                footer.InitDefaults();
                footer.OrigSize = ((ulong)driveSize).EndianSwap();
                footer.CurSize  = footer.OrigSize;
                footer.UniqueId = Header.VDUID;

                // don't need to calculate these
                footer.DiskGeometryHeads     = 0;
                footer.DiskGeometrySectors   = 0;
                footer.DiskGeometryCylinders = 0;
                footer.TimeStamp             = 0;

                footer.CalculateChecksum();

                vhdFile.Writer.WriteStruct(footer);
            }
            if (DisableNativeFunctions)
            {
                return(true);
            }

            // make sure NTFS compression is disabled on the vhd

            int lpBytesReturned = 0;
// ReSharper disable InconsistentNaming
            const int FSCTL_SET_COMPRESSION   = 0x9C040;
            short     COMPRESSION_FORMAT_NONE = 0;

// ReSharper restore InconsistentNaming

            using (FileStream f = File.Open(destFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None))
            {
#pragma warning disable 618
                Natives.DeviceIoControl(f.Handle, FSCTL_SET_COMPRESSION,
#pragma warning restore 618
                                        ref COMPRESSION_FORMAT_NONE, 2 /*sizeof(short)*/, IntPtr.Zero, 0,
                                        ref lpBytesReturned, IntPtr.Zero);
            }

            return(true);
        }