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REFACTOR: Final cleanup of DiscImageChef.DiscImages.

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This commit is contained in:
Natalia Portillo
2017-12-24 00:12:31 +00:00
parent 536888507f
commit 736552f6d8
52 changed files with 5203 additions and 5359 deletions
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421
DiscImageChef.DiscImages/VHD.cs
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@@ -45,319 +45,154 @@ namespace DiscImageChef.DiscImages
{
/// <inheritdoc />
/// <summary>
/// Supports Connectix/Microsoft Virtual PC hard disk image format
/// Until Virtual PC 5 there existed no format, and the hard disk image was
/// merely a sector by sector (RAW) image with a resource fork giving
/// information to Virtual PC itself.
/// Supports Connectix/Microsoft Virtual PC hard disk image format
/// Until Virtual PC 5 there existed no format, and the hard disk image was
/// merely a sector by sector (RAW) image with a resource fork giving
/// information to Virtual PC itself.
/// </summary>
public class Vhd : ImagePlugin
{
#region Internal Structures
struct HardDiskFooter
{
/// <summary>
/// Offset 0x00, File magic number, <see cref="Vhd.IMAGE_COOKIE"/>
/// </summary>
public ulong Cookie;
/// <summary>
/// Offset 0x08, Specific feature support
/// </summary>
public uint Features;
/// <summary>
/// Offset 0x0C, File format version
/// </summary>
public uint Version;
/// <summary>
/// Offset 0x10, Offset from beginning of file to next structure
/// </summary>
public ulong Offset;
/// <summary>
/// Offset 0x18, Creation date seconds since 2000/01/01 00:00:00 UTC
/// </summary>
public uint Timestamp;
/// <summary>
/// Offset 0x1C, Application that created this disk image
/// </summary>
public uint CreatorApplication;
/// <summary>
/// Offset 0x20, Version of the application that created this disk image
/// </summary>
public uint CreatorVersion;
/// <summary>
/// Offset 0x24, Host operating system of the application that created this disk image
/// </summary>
public uint CreatorHostOs;
/// <summary>
/// Offset 0x28, Original hard disk size, in bytes
/// </summary>
public ulong OriginalSize;
/// <summary>
/// Offset 0x30, Current hard disk size, in bytes
/// </summary>
public ulong CurrentSize;
/// <summary>
/// Offset 0x38, CHS geometry
/// Cylinder mask = 0xFFFF0000
/// Heads mask = 0x0000FF00
/// Sectors mask = 0x000000FF
/// </summary>
public uint DiskGeometry;
/// <summary>
/// Offset 0x3C, Disk image type
/// </summary>
public uint DiskType;
/// <summary>
/// Offset 0x40, Checksum for this structure
/// </summary>
public uint Checksum;
/// <summary>
/// Offset 0x44, UUID, used to associate parent with differencing disk images
/// </summary>
public Guid UniqueId;
/// <summary>
/// Offset 0x54, If set, system is saved, so compaction and expansion cannot be performed
/// </summary>
public byte SavedState;
/// <summary>
/// Offset 0x55, 427 bytes reserved, should contain zeros.
/// </summary>
public byte[] Reserved;
}
struct ParentLocatorEntry
{
/// <summary>
/// Offset 0x00, Describes the platform specific type this entry belongs to
/// </summary>
public uint PlatformCode;
/// <summary>
/// Offset 0x04, Describes the number of 512 bytes sectors used by this entry
/// </summary>
public uint PlatformDataSpace;
/// <summary>
/// Offset 0x08, Describes this entry's size in bytes
/// </summary>
public uint PlatformDataLength;
/// <summary>
/// Offset 0x0c, Reserved
/// </summary>
public uint Reserved;
/// <summary>
/// Offset 0x10, Offset on disk image this entry resides on
/// </summary>
public ulong PlatformDataOffset;
}
struct DynamicDiskHeader
{
/// <summary>
/// Offset 0x00, Header magic, <see cref="Vhd.DYNAMIC_COOKIE"/>
/// </summary>
public ulong Cookie;
/// <summary>
/// Offset 0x08, Offset to next structure on disk image.
/// Currently unused, 0xFFFFFFFF
/// </summary>
public ulong DataOffset;
/// <summary>
/// Offset 0x10, Offset of the Block Allocation Table (BAT)
/// </summary>
public ulong TableOffset;
/// <summary>
/// Offset 0x18, Version of this header
/// </summary>
public uint HeaderVersion;
/// <summary>
/// Offset 0x1C, Maximum entries present in the BAT
/// </summary>
public uint MaxTableEntries;
/// <summary>
/// Offset 0x20, Size of a block in bytes
/// Should always be a power of two of 512
/// </summary>
public uint BlockSize;
/// <summary>
/// Offset 0x24, Checksum of this header
/// </summary>
public uint Checksum;
/// <summary>
/// Offset 0x28, UUID of parent disk image for differencing type
/// </summary>
public Guid ParentId;
/// <summary>
/// Offset 0x38, Timestamp of parent disk image
/// </summary>
public uint ParentTimestamp;
/// <summary>
/// Offset 0x3C, Reserved
/// </summary>
public uint Reserved;
/// <summary>
/// Offset 0x40, 512 bytes UTF-16 of parent disk image filename
/// </summary>
public string ParentName;
/// <summary>
/// Offset 0x240, Parent disk image locator entry, <see cref="ParentLocatorEntry"/>
/// </summary>
public ParentLocatorEntry[] LocatorEntries;
/// <summary>
/// Offset 0x300, 256 reserved bytes
/// </summary>
public byte[] Reserved2;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct BatSector
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public uint[] blockPointer;
}
#endregion
#region Internal Constants
/// <summary>
/// File magic number, "conectix"
/// File magic number, "conectix"
/// </summary>
const ulong IMAGE_COOKIE = 0x636F6E6563746978;
/// <summary>
/// Dynamic disk header magic, "cxsparse"
/// Dynamic disk header magic, "cxsparse"
/// </summary>
const ulong DYNAMIC_COOKIE = 0x6378737061727365;
/// <summary>
/// Disk image is candidate for deletion on shutdown
/// Disk image is candidate for deletion on shutdown
/// </summary>
const uint FEATURES_TEMPORARY = 0x00000001;
/// <summary>
/// Unknown, set from Virtual PC for Mac 7 onwards
/// Unknown, set from Virtual PC for Mac 7 onwards
/// </summary>
const uint FEATURES_RESERVED = 0x00000002;
/// <summary>
/// Unknown
/// Unknown
/// </summary>
const uint FEATURES_UNKNOWN = 0x00000100;
/// <summary>
/// Only known version
/// Only known version
/// </summary>
const uint VERSION1 = 0x00010000;
/// <summary>
/// Created by Virtual PC, "vpc "
/// Created by Virtual PC, "vpc "
/// </summary>
const uint CREATOR_VIRTUAL_PC = 0x76706320;
/// <summary>
/// Created by Virtual Server, "vs "
/// Created by Virtual Server, "vs "
/// </summary>
const uint CREATOR_VIRTUAL_SERVER = 0x76732020;
/// <summary>
/// Created by QEMU, "qemu"
/// Created by QEMU, "qemu"
/// </summary>
const uint CREATOR_QEMU = 0x71656D75;
/// <summary>
/// Created by VirtualBox, "vbox"
/// Created by VirtualBox, "vbox"
/// </summary>
const uint CREATOR_VIRTUAL_BOX = 0x76626F78;
/// <summary>
/// Disk image created by Virtual Server 2004
/// Disk image created by Virtual Server 2004
/// </summary>
const uint VERSION_VIRTUAL_SERVER2004 = 0x00010000;
/// <summary>
/// Disk image created by Virtual PC 2004
/// Disk image created by Virtual PC 2004
/// </summary>
const uint VERSION_VIRTUAL_PC2004 = 0x00050000;
/// <summary>
/// Disk image created by Virtual PC 2007
/// Disk image created by Virtual PC 2007
/// </summary>
const uint VERSION_VIRTUAL_PC2007 = 0x00050003;
/// <summary>
/// Disk image created by Virtual PC for Mac 5, 6 or 7
/// Disk image created by Virtual PC for Mac 5, 6 or 7
/// </summary>
const uint VERSION_VIRTUAL_PC_MAC = 0x00040000;
/// <summary>
/// Disk image created in Windows, "Wi2k"
/// Disk image created in Windows, "Wi2k"
/// </summary>
const uint CREATOR_WINDOWS = 0x5769326B;
/// <summary>
/// Disk image created in Macintosh, "Mac "
/// Disk image created in Macintosh, "Mac "
/// </summary>
const uint CREATOR_MACINTOSH = 0x4D616320;
/// <summary>
/// Seen in Virtual PC for Mac for dynamic and fixed images
/// Seen in Virtual PC for Mac for dynamic and fixed images
/// </summary>
const uint CREATOR_MACINTOSH_OLD = 0x00000000;
/// <summary>
/// Disk image type is none, useless?
/// Disk image type is none, useless?
/// </summary>
const uint TYPE_NONE = 0;
/// <summary>
/// Deprecated disk image type
/// Deprecated disk image type
/// </summary>
const uint TYPE_DEPRECATED1 = 1;
/// <summary>
/// Fixed disk image type
/// Fixed disk image type
/// </summary>
const uint TYPE_FIXED = 2;
/// <summary>
/// Dynamic disk image type
/// Dynamic disk image type
/// </summary>
const uint TYPE_DYNAMIC = 3;
/// <summary>
/// Differencing disk image type
/// Differencing disk image type
/// </summary>
const uint TYPE_DIFFERENCING = 4;
/// <summary>
/// Deprecated disk image type
/// Deprecated disk image type
/// </summary>
const uint TYPE_DEPRECATED2 = 5;
/// <summary>
/// Deprecated disk image type
/// Deprecated disk image type
/// </summary>
const uint TYPE_DEPRECATED3 = 6;
/// <summary>
/// Means platform locator is unused
/// Means platform locator is unused
/// </summary>
const uint PLATFORM_CODE_UNUSED = 0x00000000;
/// <summary>
/// Stores a relative path string for Windows, unknown locale used, deprecated, "Wi2r"
/// Stores a relative path string for Windows, unknown locale used, deprecated, "Wi2r"
/// </summary>
const uint PLATFORM_CODE_WINDOWS_RELATIVE = 0x57693272;
/// <summary>
/// Stores an absolute path string for Windows, unknown locale used, deprecated, "Wi2k"
/// Stores an absolute path string for Windows, unknown locale used, deprecated, "Wi2k"
/// </summary>
const uint PLATFORM_CODE_WINDOWS_ABSOLUTE = 0x5769326B;
/// <summary>
/// Stores a relative path string for Windows in UTF-16, "W2ru"
/// Stores a relative path string for Windows in UTF-16, "W2ru"
/// </summary>
const uint PLATFORM_CODE_WINDOWS_RELATIVE_U = 0x57327275;
/// <summary>
/// Stores an absolute path string for Windows in UTF-16, "W2ku"
/// Stores an absolute path string for Windows in UTF-16, "W2ku"
/// </summary>
const uint PLATFORM_CODE_WINDOWS_ABSOLUTE_U = 0x57326B75;
/// <summary>
/// Stores a Mac OS alias as a blob, "Mac "
/// Stores a Mac OS alias as a blob, "Mac "
/// </summary>
const uint PLATFORM_CODE_MACINTOSH_ALIAS = 0x4D616320;
/// <summary>
/// Stores a Mac OS X URI (RFC-2396) absolute path in UTF-8, "MacX"
/// Stores a Mac OS X URI (RFC-2396) absolute path in UTF-8, "MacX"
/// </summary>
const uint PLATFORM_CODE_MACINTOSH_URI = 0x4D616358;
#endregion
#region Internal variables
HardDiskFooter thisFooter;
DynamicDiskHeader thisDynamic;
DateTime thisDateTime;
DateTime parentDateTime;
Filter thisFilter;
uint[] blockAllocationTable;
uint bitmapSize;
uint[] blockAllocationTable;
byte[][] locatorEntriesData;
DateTime parentDateTime;
ImagePlugin parentImage;
#endregion
DateTime thisDateTime;
DynamicDiskHeader thisDynamic;
Filter thisFilter;
HardDiskFooter thisFooter;
public Vhd()
{
@@ -388,7 +223,6 @@ namespace DiscImageChef.DiscImages
};
}
#region public methods
public override bool IdentifyImage(Filter imageFilter)
{
Stream imageStream = imageFilter.GetDataForkStream();
@@ -787,7 +621,8 @@ namespace DiscImageChef.DiscImages
// This does the big-endian trick but reverses the order of elements also
Array.Reverse(batSectorBytes);
GCHandle handle = GCHandle.Alloc(batSectorBytes, GCHandleType.Pinned);
BatSector batSector = (BatSector)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(BatSector));
BatSector batSector =
(BatSector)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(BatSector));
handle.Free();
// This restores the order of elements
Array.Reverse(batSector.blockPointer);
@@ -1037,7 +872,7 @@ namespace DiscImageChef.DiscImages
case TYPE_DIFFERENCING:
{
// Block number for BAT searching
uint blockNumber = (uint)Math.Floor((sectorAddress / (thisDynamic.BlockSize / 512.0)));
uint blockNumber = (uint)Math.Floor(sectorAddress / (thisDynamic.BlockSize / 512.0));
// Sector number inside of block
uint sectorInBlock = (uint)(sectorAddress % (thisDynamic.BlockSize / 512));
@@ -1116,7 +951,7 @@ namespace DiscImageChef.DiscImages
case TYPE_DYNAMIC:
{
// Block number for BAT searching
uint blockNumber = (uint)Math.Floor((sectorAddress / (thisDynamic.BlockSize / 512.0)));
uint blockNumber = (uint)Math.Floor(sectorAddress / (thisDynamic.BlockSize / 512.0));
// Sector number inside of block
uint sectorInBlock = (uint)(sectorAddress % (thisDynamic.BlockSize / 512));
// How many sectors before reaching end of block
@@ -1186,18 +1021,14 @@ namespace DiscImageChef.DiscImages
}
}
}
#endregion
#region private methods
static uint VhdChecksum(IEnumerable<byte> data)
{
uint checksum = data.Aggregate<byte, uint>(0, (current, b) => current + b);
return ~checksum;
}
#endregion
#region Unsupported features
public override string GetImageComments()
{
return null;
@@ -1363,6 +1194,164 @@ namespace DiscImageChef.DiscImages
{
return null;
}
#endregion
struct HardDiskFooter
{
/// <summary>
/// Offset 0x00, File magic number, <see cref="Vhd.IMAGE_COOKIE" />
/// </summary>
public ulong Cookie;
/// <summary>
/// Offset 0x08, Specific feature support
/// </summary>
public uint Features;
/// <summary>
/// Offset 0x0C, File format version
/// </summary>
public uint Version;
/// <summary>
/// Offset 0x10, Offset from beginning of file to next structure
/// </summary>
public ulong Offset;
/// <summary>
/// Offset 0x18, Creation date seconds since 2000/01/01 00:00:00 UTC
/// </summary>
public uint Timestamp;
/// <summary>
/// Offset 0x1C, Application that created this disk image
/// </summary>
public uint CreatorApplication;
/// <summary>
/// Offset 0x20, Version of the application that created this disk image
/// </summary>
public uint CreatorVersion;
/// <summary>
/// Offset 0x24, Host operating system of the application that created this disk image
/// </summary>
public uint CreatorHostOs;
/// <summary>
/// Offset 0x28, Original hard disk size, in bytes
/// </summary>
public ulong OriginalSize;
/// <summary>
/// Offset 0x30, Current hard disk size, in bytes
/// </summary>
public ulong CurrentSize;
/// <summary>
/// Offset 0x38, CHS geometry
/// Cylinder mask = 0xFFFF0000
/// Heads mask = 0x0000FF00
/// Sectors mask = 0x000000FF
/// </summary>
public uint DiskGeometry;
/// <summary>
/// Offset 0x3C, Disk image type
/// </summary>
public uint DiskType;
/// <summary>
/// Offset 0x40, Checksum for this structure
/// </summary>
public uint Checksum;
/// <summary>
/// Offset 0x44, UUID, used to associate parent with differencing disk images
/// </summary>
public Guid UniqueId;
/// <summary>
/// Offset 0x54, If set, system is saved, so compaction and expansion cannot be performed
/// </summary>
public byte SavedState;
/// <summary>
/// Offset 0x55, 427 bytes reserved, should contain zeros.
/// </summary>
public byte[] Reserved;
}
struct ParentLocatorEntry
{
/// <summary>
/// Offset 0x00, Describes the platform specific type this entry belongs to
/// </summary>
public uint PlatformCode;
/// <summary>
/// Offset 0x04, Describes the number of 512 bytes sectors used by this entry
/// </summary>
public uint PlatformDataSpace;
/// <summary>
/// Offset 0x08, Describes this entry's size in bytes
/// </summary>
public uint PlatformDataLength;
/// <summary>
/// Offset 0x0c, Reserved
/// </summary>
public uint Reserved;
/// <summary>
/// Offset 0x10, Offset on disk image this entry resides on
/// </summary>
public ulong PlatformDataOffset;
}
struct DynamicDiskHeader
{
/// <summary>
/// Offset 0x00, Header magic, <see cref="Vhd.DYNAMIC_COOKIE" />
/// </summary>
public ulong Cookie;
/// <summary>
/// Offset 0x08, Offset to next structure on disk image.
/// Currently unused, 0xFFFFFFFF
/// </summary>
public ulong DataOffset;
/// <summary>
/// Offset 0x10, Offset of the Block Allocation Table (BAT)
/// </summary>
public ulong TableOffset;
/// <summary>
/// Offset 0x18, Version of this header
/// </summary>
public uint HeaderVersion;
/// <summary>
/// Offset 0x1C, Maximum entries present in the BAT
/// </summary>
public uint MaxTableEntries;
/// <summary>
/// Offset 0x20, Size of a block in bytes
/// Should always be a power of two of 512
/// </summary>
public uint BlockSize;
/// <summary>
/// Offset 0x24, Checksum of this header
/// </summary>
public uint Checksum;
/// <summary>
/// Offset 0x28, UUID of parent disk image for differencing type
/// </summary>
public Guid ParentId;
/// <summary>
/// Offset 0x38, Timestamp of parent disk image
/// </summary>
public uint ParentTimestamp;
/// <summary>
/// Offset 0x3C, Reserved
/// </summary>
public uint Reserved;
/// <summary>
/// Offset 0x40, 512 bytes UTF-16 of parent disk image filename
/// </summary>
public string ParentName;
/// <summary>
/// Offset 0x240, Parent disk image locator entry, <see cref="ParentLocatorEntry" />
/// </summary>
public ParentLocatorEntry[] LocatorEntries;
/// <summary>
/// Offset 0x300, 256 reserved bytes
/// </summary>
public byte[] Reserved2;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct BatSector
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public uint[] blockPointer;
}
}
}