mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
193 lines
9.1 KiB
C#
193 lines
9.1 KiB
C#
// /***************************************************************************
|
|
// The Disc Image Chef
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Filename : Read.cs
|
|
// Author(s) : Natalia Portillo <claunia@claunia.com>
|
|
//
|
|
// Component : Disk image plugins.
|
|
//
|
|
// --[ Description ] ----------------------------------------------------------
|
|
//
|
|
// Reads VirtualBox disk images.
|
|
//
|
|
// --[ License ] --------------------------------------------------------------
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as
|
|
// published by the Free Software Foundation; either version 2.1 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
//
|
|
// ----------------------------------------------------------------------------
|
|
// Copyright © 2011-2018 Natalia Portillo
|
|
// ****************************************************************************/
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.IO;
|
|
using System.Runtime.InteropServices;
|
|
using DiscImageChef.CommonTypes;
|
|
using DiscImageChef.CommonTypes.Enums;
|
|
using DiscImageChef.CommonTypes.Exceptions;
|
|
using DiscImageChef.CommonTypes.Interfaces;
|
|
using DiscImageChef.Console;
|
|
|
|
namespace DiscImageChef.DiscImages
|
|
{
|
|
public partial class Vdi
|
|
{
|
|
public bool Open(IFilter imageFilter)
|
|
{
|
|
Stream stream = imageFilter.GetDataForkStream();
|
|
stream.Seek(0, SeekOrigin.Begin);
|
|
|
|
if(stream.Length < 512) return false;
|
|
|
|
byte[] vHdrB = new byte[Marshal.SizeOf(vHdr)];
|
|
stream.Read(vHdrB, 0, Marshal.SizeOf(vHdr));
|
|
vHdr = new VdiHeader();
|
|
IntPtr headerPtr = Marshal.AllocHGlobal(Marshal.SizeOf(vHdr));
|
|
Marshal.Copy(vHdrB, 0, headerPtr, Marshal.SizeOf(vHdr));
|
|
vHdr = (VdiHeader)Marshal.PtrToStructure(headerPtr, typeof(VdiHeader));
|
|
Marshal.FreeHGlobal(headerPtr);
|
|
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.creator = {0}", vHdr.creator);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.magic = {0}", vHdr.magic);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.version = {0}.{1}", vHdr.majorVersion,
|
|
vHdr.minorVersion);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.headerSize = {0}", vHdr.headerSize);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.imageType = {0}", vHdr.imageType);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.imageFlags = {0}", vHdr.imageFlags);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.description = {0}", vHdr.comments);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.offsetBlocks = {0}", vHdr.offsetBlocks);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.offsetData = {0}", vHdr.offsetData);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.cylinders = {0}", vHdr.cylinders);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.heads = {0}", vHdr.heads);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.spt = {0}", vHdr.spt);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.sectorSize = {0}", vHdr.sectorSize);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.size = {0}", vHdr.size);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.blockSize = {0}", vHdr.blockSize);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.blockExtraData = {0}", vHdr.blockExtraData);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.blocks = {0}", vHdr.blocks);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.allocatedBlocks = {0}", vHdr.allocatedBlocks);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.uuid = {0}", vHdr.uuid);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.snapshotUuid = {0}", vHdr.snapshotUuid);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.linkUuid = {0}", vHdr.linkUuid);
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "vHdr.parentUuid = {0}", vHdr.parentUuid);
|
|
|
|
if(vHdr.imageType != VdiImageType.Normal)
|
|
throw new
|
|
FeatureSupportedButNotImplementedImageException($"Support for image type {vHdr.imageType} not yet implemented");
|
|
|
|
DicConsole.DebugWriteLine("VirtualBox plugin", "Reading Image Block Map");
|
|
stream.Seek(vHdr.offsetBlocks, SeekOrigin.Begin);
|
|
ibm = new uint[vHdr.blocks];
|
|
byte[] ibmB = new byte[vHdr.blocks * 4];
|
|
stream.Read(ibmB, 0, ibmB.Length);
|
|
for(int i = 0; i < ibm.Length; i++) ibm[i] = BitConverter.ToUInt32(ibmB, i * 4);
|
|
|
|
sectorCache = new Dictionary<ulong, byte[]>();
|
|
|
|
imageInfo.CreationTime = imageFilter.GetCreationTime();
|
|
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
|
|
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
|
|
imageInfo.Sectors = vHdr.size / vHdr.sectorSize;
|
|
imageInfo.ImageSize = vHdr.size;
|
|
imageInfo.SectorSize = vHdr.sectorSize;
|
|
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
|
|
imageInfo.MediaType = MediaType.GENERIC_HDD;
|
|
imageInfo.Comments = vHdr.comments;
|
|
imageInfo.Version = $"{vHdr.majorVersion}.{vHdr.minorVersion}";
|
|
|
|
switch(vHdr.creator)
|
|
{
|
|
case SUN_VDI:
|
|
imageInfo.Application = "Sun VirtualBox";
|
|
break;
|
|
case SUN_OLD_VDI:
|
|
imageInfo.Application = "Sun xVM";
|
|
break;
|
|
case ORACLE_VDI:
|
|
imageInfo.Application = "Oracle VirtualBox";
|
|
break;
|
|
case QEMUVDI:
|
|
imageInfo.Application = "QEMU";
|
|
break;
|
|
case INNOTEK_VDI:
|
|
case INNOTEK_OLD_VDI:
|
|
imageInfo.Application = "innotek VirtualBox";
|
|
break;
|
|
case DIC_VDI:
|
|
imageInfo.Application = "DiscImageChef";
|
|
break;
|
|
}
|
|
|
|
imageStream = stream;
|
|
|
|
imageInfo.Cylinders = vHdr.cylinders;
|
|
imageInfo.Heads = vHdr.heads;
|
|
imageInfo.SectorsPerTrack = vHdr.spt;
|
|
|
|
return true;
|
|
}
|
|
|
|
public byte[] ReadSector(ulong sectorAddress)
|
|
{
|
|
if(sectorAddress > imageInfo.Sectors - 1)
|
|
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
|
$"Sector address {sectorAddress} not found");
|
|
|
|
if(sectorCache.TryGetValue(sectorAddress, out byte[] sector)) return sector;
|
|
|
|
ulong index = sectorAddress * vHdr.sectorSize / vHdr.blockSize;
|
|
ulong secOff = sectorAddress * vHdr.sectorSize % vHdr.blockSize;
|
|
|
|
uint ibmOff = ibm[index];
|
|
|
|
if(ibmOff == VDI_EMPTY) return new byte[vHdr.sectorSize];
|
|
|
|
ulong imageOff = vHdr.offsetData + ibmOff * vHdr.blockSize;
|
|
|
|
byte[] cluster = new byte[vHdr.blockSize];
|
|
imageStream.Seek((long)imageOff, SeekOrigin.Begin);
|
|
imageStream.Read(cluster, 0, (int)vHdr.blockSize);
|
|
sector = new byte[vHdr.sectorSize];
|
|
Array.Copy(cluster, (int)secOff, sector, 0, vHdr.sectorSize);
|
|
|
|
if(sectorCache.Count > MAX_CACHED_SECTORS) sectorCache.Clear();
|
|
|
|
sectorCache.Add(sectorAddress, sector);
|
|
|
|
return sector;
|
|
}
|
|
|
|
public byte[] ReadSectors(ulong sectorAddress, uint length)
|
|
{
|
|
if(sectorAddress > imageInfo.Sectors - 1)
|
|
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
|
|
$"Sector address {sectorAddress} not found");
|
|
|
|
if(sectorAddress + length > imageInfo.Sectors)
|
|
throw new ArgumentOutOfRangeException(nameof(length),
|
|
$"Requested more sectors ({sectorAddress} + {length}) than available ({imageInfo.Sectors})");
|
|
|
|
MemoryStream ms = new MemoryStream();
|
|
|
|
for(uint i = 0; i < length; i++)
|
|
{
|
|
byte[] sector = ReadSector(sectorAddress + i);
|
|
ms.Write(sector, 0, sector.Length);
|
|
}
|
|
|
|
return ms.ToArray();
|
|
}
|
|
}
|
|
} |