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Aaru/DiscImageChef.DiscImages/UDIF.cs

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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : UDIF.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Manages Apple Universal Disk Image Format.
//
// --[ 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.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Claunia.PropertyList;
using Claunia.RsrcFork;
using DiscImageChef.Checksums;
using DiscImageChef.CommonTypes;
using DiscImageChef.Compression;
using DiscImageChef.Console;
using DiscImageChef.Filters;
using Ionic.Zlib;
using Schemas;
using SharpCompress.Compressors.ADC;
using SharpCompress.Compressors.BZip2;
using Version = Resources.Version;
#pragma warning disable 612
namespace DiscImageChef.DiscImages
{
public class Udif : IWritableImage
{
const uint UDIF_SIGNATURE = 0x6B6F6C79;
const uint CHUNK_SIGNATURE = 0x6D697368;
// All chunk types with this mask are compressed
const uint CHUNK_TYPE_COMPRESSED_MASK = 0x80000000;
const uint CHUNK_TYPE_ZERO = 0x00000000;
const uint CHUNK_TYPE_COPY = 0x00000001;
const uint CHUNK_TYPE_NOCOPY = 0x00000002;
const uint CHUNK_TYPE_KENCODE = 0x80000001;
const uint CHUNK_TYPE_RLE = 0x80000002;
const uint CHUNK_TYPE_LZH = 0x80000003;
const uint CHUNK_TYPE_ADC = 0x80000004;
const uint CHUNK_TYPE_ZLIB = 0x80000005;
const uint CHUNK_TYPE_BZIP = 0x80000006;
const uint CHUNK_TYPE_LZFSE = 0x80000007;
const uint CHUNK_TYPE_COMMNT = 0x7FFFFFFE;
const uint CHUNK_TYPE_END = 0xFFFFFFFF;
const uint UDIF_CHECKSUM_TYPE_NONE = 0;
const uint UDIF_CHECKSUM_TYPE_CRC28 = 1;
const uint UDIF_CHECKSUM_TYPE_CRC32 = 2;
const uint UDIF_CHECKSUM_TYPE_DC42 = 3;
const uint UDIF_CHECKSUM_TYPE_MD5 = 4;
const uint UDIF_CHECKSUM_TYPE_SHA = 5;
const uint UDIF_CHECKSUM_TYPE_SHA1 = 6;
const uint UDIF_CHECKSUM_TYPE_SHA256 = 7;
const uint UDIF_CHECKSUM_TYPE_SHA384 = 8;
const uint UDIF_CHECKSUM_TYPE_SHA512 = 9;
const string RESOURCE_FORK_KEY = "resource-fork";
const string BLOCK_KEY = "blkx";
const uint BLOCK_OS_TYPE = 0x626C6B78;
const uint MAX_CACHE_SIZE = 16777216;
const uint SECTOR_SIZE = 512;
const uint MAX_CACHED_SECTORS = MAX_CACHE_SIZE / SECTOR_SIZE;
uint buffersize;
Dictionary<ulong, byte[]> chunkCache;
Dictionary<ulong, BlockChunk> chunks;
BlockChunk currentChunk;
uint currentChunkCacheSize;
ulong currentSector;
Crc32Context dataForkChecksum;
UdifFooter footer;
ImageInfo imageInfo;
Stream imageStream;
Crc32Context masterChecksum;
Dictionary<ulong, byte[]> sectorCache;
FileStream writingStream;
public Udif()
{
imageInfo = new ImageInfo
{
ReadableSectorTags = new List<SectorTagType>(),
ReadableMediaTags = new List<MediaTagType>(),
HasPartitions = false,
HasSessions = false,
Version = null,
Application = null,
ApplicationVersion = null,
Creator = null,
Comments = null,
MediaManufacturer = null,
MediaModel = null,
MediaSerialNumber = null,
MediaBarcode = null,
MediaPartNumber = null,
MediaSequence = 0,
LastMediaSequence = 0,
DriveManufacturer = null,
DriveModel = null,
DriveSerialNumber = null,
DriveFirmwareRevision = null
};
}
public ImageInfo Info => imageInfo;
public string Name => "Apple Universal Disk Image Format";
public Guid Id => new Guid("5BEB9002-CF3D-429C-8E06-9A96F49203FF");
public string Format => "Apple Universal Disk Image Format";
public List<Partition> Partitions =>
throw new FeatureUnsupportedImageException("Feature not supported by image format");
public List<Track> Tracks =>
throw new FeatureUnsupportedImageException("Feature not supported by image format");
public List<Session> Sessions =>
throw new FeatureUnsupportedImageException("Feature not supported by image format");
public bool Identify(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
if(stream.Length < 512) return false;
stream.Seek(-Marshal.SizeOf(footer), SeekOrigin.End);
byte[] footerB = new byte[Marshal.SizeOf(footer)];
stream.Read(footerB, 0, Marshal.SizeOf(footer));
footer = BigEndianMarshal.ByteArrayToStructureBigEndian<UdifFooter>(footerB);
if(footer.signature == UDIF_SIGNATURE) return true;
// Old UDIF as created by DiskCopy 6.5 using "OBSOLETE" format. (DiskCopy 5 rumored format?)
stream.Seek(0, SeekOrigin.Begin);
byte[] headerB = new byte[Marshal.SizeOf(footer)];
stream.Read(headerB, 0, Marshal.SizeOf(footer));
footer = BigEndianMarshal.ByteArrayToStructureBigEndian<UdifFooter>(headerB);
return footer.signature == UDIF_SIGNATURE;
}
public bool Open(IFilter imageFilter)
{
Stream stream = imageFilter.GetDataForkStream();
if(stream.Length < 512) return false;
stream.Seek(-Marshal.SizeOf(footer), SeekOrigin.End);
byte[] footerB = new byte[Marshal.SizeOf(footer)];
stream.Read(footerB, 0, Marshal.SizeOf(footer));
footer = BigEndianMarshal.ByteArrayToStructureBigEndian<UdifFooter>(footerB);
if(footer.signature != UDIF_SIGNATURE)
{
stream.Seek(0, SeekOrigin.Begin);
footerB = new byte[Marshal.SizeOf(footer)];
stream.Read(footerB, 0, Marshal.SizeOf(footer));
footer = BigEndianMarshal.ByteArrayToStructureBigEndian<UdifFooter>(footerB);
if(footer.signature != UDIF_SIGNATURE) throw new Exception("Unable to find UDIF signature.");
DicConsole.VerboseWriteLine("Found obsolete UDIF format.");
}
DicConsole.DebugWriteLine("UDIF plugin", "footer.signature = 0x{0:X8}", footer.signature);
DicConsole.DebugWriteLine("UDIF plugin", "footer.version = {0}", footer.version);
DicConsole.DebugWriteLine("UDIF plugin", "footer.headerSize = {0}", footer.headerSize);
DicConsole.DebugWriteLine("UDIF plugin", "footer.flags = {0}", footer.flags);
DicConsole.DebugWriteLine("UDIF plugin", "footer.runningDataForkOff = {0}", footer.runningDataForkOff);
DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkOff = {0}", footer.dataForkOff);
DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkLen = {0}", footer.dataForkLen);
DicConsole.DebugWriteLine("UDIF plugin", "footer.rsrcForkOff = {0}", footer.rsrcForkOff);
DicConsole.DebugWriteLine("UDIF plugin", "footer.rsrcForkLen = {0}", footer.rsrcForkLen);
DicConsole.DebugWriteLine("UDIF plugin", "footer.segmentNumber = {0}", footer.segmentNumber);
DicConsole.DebugWriteLine("UDIF plugin", "footer.segmentCount = {0}", footer.segmentCount);
DicConsole.DebugWriteLine("UDIF plugin", "footer.segmentId = {0}", footer.segmentId);
DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkChkType = {0}", footer.dataForkChkType);
DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkLen = {0}", footer.dataForkLen);
DicConsole.DebugWriteLine("UDIF plugin", "footer.dataForkChk = 0x{0:X8}", footer.dataForkChk);
DicConsole.DebugWriteLine("UDIF plugin", "footer.plistOff = {0}", footer.plistOff);
DicConsole.DebugWriteLine("UDIF plugin", "footer.plistLen = {0}", footer.plistLen);
DicConsole.DebugWriteLine("UDIF plugin", "footer.masterChkType = {0}", footer.masterChkType);
DicConsole.DebugWriteLine("UDIF plugin", "footer.masterChkLen = {0}", footer.masterChkLen);
DicConsole.DebugWriteLine("UDIF plugin", "footer.masterChk = 0x{0:X8}", footer.masterChk);
DicConsole.DebugWriteLine("UDIF plugin", "footer.imageVariant = {0}", footer.imageVariant);
DicConsole.DebugWriteLine("UDIF plugin", "footer.sectorCount = {0}", footer.sectorCount);
DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved1 is empty? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved1));
DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved2 is empty? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved2));
DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved3 is empty? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved3));
DicConsole.DebugWriteLine("UDIF plugin", "footer.reserved4 is empty? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(footer.reserved4));
// Block chunks and headers
List<byte[]> blkxList = new List<byte[]>();
chunks = new Dictionary<ulong, BlockChunk>();
bool fakeBlockChunks = false;
byte[] vers = null;
if(footer.plistLen == 0 && footer.rsrcForkLen != 0)
{
DicConsole.DebugWriteLine("UDIF plugin", "Reading resource fork.");
byte[] rsrcB = new byte[footer.rsrcForkLen];
stream.Seek((long)footer.rsrcForkOff, SeekOrigin.Begin);
stream.Read(rsrcB, 0, rsrcB.Length);
ResourceFork rsrc = new ResourceFork(rsrcB);
if(!rsrc.ContainsKey(BLOCK_OS_TYPE))
throw new
ImageNotSupportedException("Image resource fork doesn't contain UDIF block chunks. Please fill an issue and send it to us.");
Resource blkxRez = rsrc.GetResource(BLOCK_OS_TYPE);
if(blkxRez == null)
throw new
ImageNotSupportedException("Image resource fork doesn't contain UDIF block chunks. Please fill an issue and send it to us.");
if(blkxRez.GetIds().Length == 0)
throw new
ImageNotSupportedException("Image resource fork doesn't contain UDIF block chunks. Please fill an issue and send it to us.");
blkxList.AddRange(blkxRez.GetIds().Select(blkxId => blkxRez.GetResource(blkxId)));
Resource versRez = rsrc.GetResource(0x76657273);
if(versRez != null) vers = versRez.GetResource(versRez.GetIds()[0]);
}
else if(footer.plistLen != 0)
{
DicConsole.DebugWriteLine("UDIF plugin", "Reading property list.");
byte[] plistB = new byte[footer.plistLen];
stream.Seek((long)footer.plistOff, SeekOrigin.Begin);
stream.Read(plistB, 0, plistB.Length);
DicConsole.DebugWriteLine("UDIF plugin", "Parsing property list.");
NSDictionary plist = (NSDictionary)XmlPropertyListParser.Parse(plistB);
if(plist == null) throw new Exception("Could not parse property list.");
if(!plist.TryGetValue(RESOURCE_FORK_KEY, out NSObject rsrcObj))
throw new Exception("Could not retrieve resource fork.");
NSDictionary rsrc = (NSDictionary)rsrcObj;
if(!rsrc.TryGetValue(BLOCK_KEY, out NSObject blkxObj))
throw new Exception("Could not retrieve block chunks array.");
NSObject[] blkx = ((NSArray)blkxObj).GetArray();
foreach(NSDictionary part in blkx.Cast<NSDictionary>())
{
if(!part.TryGetValue("Name", out _)) throw new Exception("Could not retrieve Name");
if(!part.TryGetValue("Data", out NSObject dataObj)) throw new Exception("Could not retrieve Data");
blkxList.Add(((NSData)dataObj).Bytes);
}
if(rsrc.TryGetValue("vers", out NSObject versObj))
{
NSObject[] versArray = ((NSArray)versObj).GetArray();
if(versArray.Length >= 1) vers = ((NSData)versArray[0]).Bytes;
}
}
else
{
// Obsolete read-only UDIF only prepended the header and then put the image without any kind of block references.
// So let's falsify a block chunk
BlockChunk bChnk = new BlockChunk
{
length = footer.dataForkLen,
offset = footer.dataForkOff,
sector = 0,
sectors = footer.sectorCount,
type = CHUNK_TYPE_COPY
};
imageInfo.Sectors = footer.sectorCount;
chunks.Add(bChnk.sector, bChnk);
buffersize = 2048 * SECTOR_SIZE;
fakeBlockChunks = true;
}
if(vers != null)
{
Version version = new Version(vers);
string release = null;
string dev = null;
string pre = null;
string major = $"{version.MajorVersion}";
string minor = $".{version.MinorVersion / 10}";
if(version.MinorVersion % 10 > 0) release = $".{version.MinorVersion % 10}";
switch(version.DevStage)
{
case Version.DevelopmentStage.Alpha:
dev = "a";
break;
case Version.DevelopmentStage.Beta:
dev = "b";
break;
case Version.DevelopmentStage.PreAlpha:
dev = "d";
break;
}
if(dev == null && version.PreReleaseVersion > 0) dev = "f";
if(dev != null) pre = $"{version.PreReleaseVersion}";
imageInfo.ApplicationVersion = $"{major}{minor}{release}{dev}{pre}";
imageInfo.Application = version.VersionString;
imageInfo.Comments = version.VersionMessage;
if(version.MajorVersion == 3) imageInfo.Application = "ShrinkWrap™";
else if(version.MajorVersion == 6)
imageInfo.Application = "DiskCopy";
}
else imageInfo.Application = "DiskCopy";
DicConsole.DebugWriteLine("UDIF plugin", "Image application = {0} version {1}", imageInfo.Application,
imageInfo.ApplicationVersion);
imageInfo.Sectors = 0;
if(!fakeBlockChunks)
{
if(blkxList.Count == 0)
throw new
ImageNotSupportedException("Could not retrieve block chunks. Please fill an issue and send it to us.");
buffersize = 0;
foreach(byte[] blkxBytes in blkxList)
{
BlockHeader bHdr = new BlockHeader();
byte[] bHdrB = new byte[Marshal.SizeOf(bHdr)];
Array.Copy(blkxBytes, 0, bHdrB, 0, Marshal.SizeOf(bHdr));
bHdr = BigEndianMarshal.ByteArrayToStructureBigEndian<BlockHeader>(bHdrB);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.signature = 0x{0:X8}", bHdr.signature);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.version = {0}", bHdr.version);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.sectorStart = {0}", bHdr.sectorStart);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.sectorCount = {0}", bHdr.sectorCount);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.dataOffset = {0}", bHdr.dataOffset);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.buffers = {0}", bHdr.buffers);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.descriptor = 0x{0:X8}", bHdr.descriptor);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved1 = {0}", bHdr.reserved1);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved2 = {0}", bHdr.reserved2);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved3 = {0}", bHdr.reserved3);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved4 = {0}", bHdr.reserved4);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved5 = {0}", bHdr.reserved5);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reserved6 = {0}", bHdr.reserved6);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.checksumType = {0}", bHdr.checksumType);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.checksumLen = {0}", bHdr.checksumLen);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.checksum = 0x{0:X8}", bHdr.checksum);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunks = {0}", bHdr.chunks);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.reservedChk is empty? = {0}",
ArrayHelpers.ArrayIsNullOrEmpty(bHdr.reservedChk));
if(bHdr.buffers > buffersize) buffersize = bHdr.buffers * SECTOR_SIZE;
for(int i = 0; i < bHdr.chunks; i++)
{
BlockChunk bChnk = new BlockChunk();
byte[] bChnkB = new byte[Marshal.SizeOf(bChnk)];
Array.Copy(blkxBytes, Marshal.SizeOf(bHdr) + Marshal.SizeOf(bChnk) * i, bChnkB, 0,
Marshal.SizeOf(bChnk));
bChnk = BigEndianMarshal.ByteArrayToStructureBigEndian<BlockChunk>(bChnkB);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].type = 0x{1:X8}", i, bChnk.type);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].comment = {1}", i, bChnk.comment);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].sector = {1}", i, bChnk.sector);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].sectors = {1}", i, bChnk.sectors);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].offset = {1}", i, bChnk.offset);
DicConsole.DebugWriteLine("UDIF plugin", "bHdr.chunk[{0}].length = {1}", i, bChnk.length);
if(bChnk.type == CHUNK_TYPE_END) break;
imageInfo.Sectors += bChnk.sectors;
// Chunk offset is relative
bChnk.sector += bHdr.sectorStart;
bChnk.offset += bHdr.dataOffset;
switch(bChnk.type)
{
// TODO: Handle comments
case CHUNK_TYPE_COMMNT: continue;
// TODO: Handle compressed chunks
case CHUNK_TYPE_KENCODE:
throw new
ImageNotSupportedException("Chunks compressed with KenCode are not yet supported.");
case CHUNK_TYPE_LZH:
throw new
ImageNotSupportedException("Chunks compressed with LZH are not yet supported.");
case CHUNK_TYPE_LZFSE:
throw new
ImageNotSupportedException("Chunks compressed with lzfse are not yet supported.");
}
if(bChnk.type > CHUNK_TYPE_NOCOPY && bChnk.type < CHUNK_TYPE_COMMNT ||
bChnk.type > CHUNK_TYPE_LZFSE && bChnk.type < CHUNK_TYPE_END)
throw new ImageNotSupportedException($"Unsupported chunk type 0x{bChnk.type:X8} found");
if(bChnk.sectors > 0) chunks.Add(bChnk.sector, bChnk);
}
}
}
sectorCache = new Dictionary<ulong, byte[]>();
chunkCache = new Dictionary<ulong, byte[]>();
currentChunkCacheSize = 0;
imageStream = stream;
imageInfo.CreationTime = imageFilter.GetCreationTime();
imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
imageInfo.SectorSize = SECTOR_SIZE;
imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
imageInfo.MediaType = MediaType.GENERIC_HDD;
imageInfo.ImageSize = imageInfo.Sectors * SECTOR_SIZE;
imageInfo.Version = $"{footer.version}";
imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63);
imageInfo.Heads = 16;
imageInfo.SectorsPerTrack = 63;
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;
BlockChunk currentChunk = new BlockChunk();
bool chunkFound = false;
ulong chunkStartSector = 0;
foreach(KeyValuePair<ulong, BlockChunk> kvp in chunks.Where(kvp => sectorAddress >= kvp.Key))
{
currentChunk = kvp.Value;
chunkFound = true;
chunkStartSector = kvp.Key;
}
long relOff = ((long)sectorAddress - (long)chunkStartSector) * SECTOR_SIZE;
if(relOff < 0)
throw new ArgumentOutOfRangeException(nameof(relOff),
$"Got a negative offset for sector {sectorAddress}. This should not happen.");
if(!chunkFound)
throw new ArgumentOutOfRangeException(nameof(sectorAddress),
$"Sector address {sectorAddress} not found");
if((currentChunk.type & CHUNK_TYPE_COMPRESSED_MASK) == CHUNK_TYPE_COMPRESSED_MASK)
{
if(!chunkCache.TryGetValue(chunkStartSector, out byte[] buffer))
{
byte[] cmpBuffer = new byte[currentChunk.length];
imageStream.Seek((long)currentChunk.offset, SeekOrigin.Begin);
imageStream.Read(cmpBuffer, 0, cmpBuffer.Length);
MemoryStream cmpMs = new MemoryStream(cmpBuffer);
Stream decStream = null;
switch(currentChunk.type)
{
case CHUNK_TYPE_ADC:
decStream = new ADCStream(cmpMs);
break;
case CHUNK_TYPE_ZLIB:
decStream = new ZlibStream(cmpMs, CompressionMode.Decompress);
break;
case CHUNK_TYPE_BZIP:
decStream = new BZip2Stream(cmpMs, SharpCompress.Compressors.CompressionMode.Decompress);
break;
case CHUNK_TYPE_RLE: break;
default:
throw new
ImageNotSupportedException($"Unsupported chunk type 0x{currentChunk.type:X8} found");
}
#if DEBUG
try
{
#endif
byte[] tmpBuffer;
int realSize;
switch(currentChunk.type)
{
case CHUNK_TYPE_ADC:
case CHUNK_TYPE_ZLIB:
case CHUNK_TYPE_BZIP:
tmpBuffer = new byte[buffersize];
realSize = decStream.Read(tmpBuffer, 0, (int)buffersize);
buffer = new byte[realSize];
Array.Copy(tmpBuffer, 0, buffer, 0, realSize);
if(currentChunkCacheSize + realSize > MAX_CACHE_SIZE)
{
chunkCache.Clear();
currentChunkCacheSize = 0;
}
chunkCache.Add(chunkStartSector, buffer);
currentChunkCacheSize += (uint)realSize;
break;
case CHUNK_TYPE_RLE:
tmpBuffer = new byte[buffersize];
realSize = 0;
AppleRle rle = new AppleRle(cmpMs);
for(int i = 0; i < buffersize; i++)
{
int b = rle.ProduceByte();
if(b == -1) break;
tmpBuffer[i] = (byte)b;
realSize++;
}
buffer = new byte[realSize];
Array.Copy(tmpBuffer, 0, buffer, 0, realSize);
break;
}
#if DEBUG
}
catch(ZlibException)
{
DicConsole.WriteLine("zlib exception on chunk starting at sector {0}", currentChunk.sector);
throw;
}
#endif
}
sector = new byte[SECTOR_SIZE];
Array.Copy(buffer, relOff, sector, 0, SECTOR_SIZE);
if(sectorCache.Count >= MAX_CACHED_SECTORS) sectorCache.Clear();
sectorCache.Add(sectorAddress, sector);
return sector;
}
switch(currentChunk.type)
{
case CHUNK_TYPE_NOCOPY:
case CHUNK_TYPE_ZERO:
sector = new byte[SECTOR_SIZE];
if(sectorCache.Count >= MAX_CACHED_SECTORS) sectorCache.Clear();
sectorCache.Add(sectorAddress, sector);
return sector;
case CHUNK_TYPE_COPY:
imageStream.Seek((long)currentChunk.offset + relOff, SeekOrigin.Begin);
sector = new byte[SECTOR_SIZE];
imageStream.Read(sector, 0, sector.Length);
if(sectorCache.Count >= MAX_CACHED_SECTORS) sectorCache.Clear();
sectorCache.Add(sectorAddress, sector);
return sector;
}
throw new ImageNotSupportedException($"Unsupported chunk type 0x{currentChunk.type:X8} found");
}
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 than available");
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();
}
public byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadDiskTag(MediaTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSector(ulong sectorAddress, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorLong(ulong sectorAddress)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorLong(ulong sectorAddress, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorsLong(ulong sectorAddress, uint length)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public List<Track> GetSessionTracks(Session session)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public List<Track> GetSessionTracks(ushort session)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public bool? VerifySector(ulong sectorAddress)
{
return null;
}
public bool? VerifySector(ulong sectorAddress, uint track)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
out List<ulong> unknownLbas)
{
failingLbas = new List<ulong>();
unknownLbas = new List<ulong>();
for(ulong i = 0; i < imageInfo.Sectors; i++) unknownLbas.Add(i);
return null;
}
public bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> failingLbas,
out List<ulong> unknownLbas)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
public bool? VerifyMediaImage()
{
return null;
}
public List<DumpHardwareType> DumpHardware => null;
public CICMMetadataType CicmMetadata => null;
public IEnumerable<MediaTagType> SupportedMediaTags => new MediaTagType[] { };
public IEnumerable<SectorTagType> SupportedSectorTags => new SectorTagType[] { };
public IEnumerable<MediaType> SupportedMediaTypes =>
new[]
{
MediaType.Unknown, MediaType.GENERIC_HDD, MediaType.FlashDrive, MediaType.CompactFlash,
MediaType.CompactFlashType2, MediaType.PCCardTypeI, MediaType.PCCardTypeII, MediaType.PCCardTypeIII,
MediaType.PCCardTypeIV
};
public IEnumerable<(string name, Type type, string description)> SupportedOptions =>
new (string name, Type type, string description)[] { };
public IEnumerable<string> KnownExtensions => new[] {".dmg"};
public bool IsWriting { get; private set; }
public string ErrorMessage { get; private set; }
public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
uint sectorSize)
{
if(sectorSize != 512)
{
ErrorMessage = "Unsupported sector size";
return false;
}
if(!SupportedMediaTypes.Contains(mediaType))
{
ErrorMessage = $"Unsupport media format {mediaType}";
return false;
}
imageInfo = new ImageInfo {MediaType = mediaType, SectorSize = sectorSize, Sectors = sectors};
try { writingStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); }
catch(IOException e)
{
ErrorMessage = $"Could not create new image file, exception {e.Message}";
return false;
}
chunks = new Dictionary<ulong, BlockChunk>();
currentChunk = new BlockChunk();
currentSector = 0;
dataForkChecksum = new Crc32Context();
dataForkChecksum.Init();
masterChecksum = new Crc32Context();
masterChecksum.Init();
IsWriting = true;
ErrorMessage = null;
return true;
}
public bool WriteMediaTag(byte[] data, MediaTagType tag)
{
ErrorMessage = "Writing media tags is not supported.";
return false;
}
public bool WriteSector(byte[] data, ulong sectorAddress)
{
if(!IsWriting)
{
ErrorMessage = "Tried to write on a non-writable image";
return false;
}
if(data.Length != imageInfo.SectorSize)
{
ErrorMessage = "Incorrect data size";
return false;
}
if(sectorAddress >= imageInfo.Sectors)
{
ErrorMessage = "Tried to write past image size";
return false;
}
if(sectorAddress < currentSector)
{
ErrorMessage = "Tried to rewind, this format rewinded on writing";
return false;
}
masterChecksum.Update(data);
bool isEmpty = ArrayHelpers.ArrayIsNullOrEmpty(data);
switch(currentChunk.type)
{
case CHUNK_TYPE_ZERO:
currentChunk.type = isEmpty ? CHUNK_TYPE_NOCOPY : CHUNK_TYPE_COPY;
break;
case CHUNK_TYPE_NOCOPY when !isEmpty:
case CHUNK_TYPE_COPY when isEmpty:
chunks.Add(currentChunk.sector, currentChunk);
currentChunk = new BlockChunk
{
type = isEmpty ? CHUNK_TYPE_NOCOPY : CHUNK_TYPE_COPY,
sector = currentSector,
offset = (ulong)(isEmpty ? 0 : writingStream.Position)
};
break;
}
currentChunk.sectors++;
currentChunk.length += (ulong)(isEmpty ? 0 : 512);
currentSector++;
if(!isEmpty)
{
dataForkChecksum.Update(data);
writingStream.Write(data, 0, data.Length);
}
ErrorMessage = "";
return true;
}
// TODO: This can be optimized
public bool WriteSectors(byte[] data, ulong sectorAddress, uint length)
{
if(!IsWriting)
{
ErrorMessage = "Tried to write on a non-writable image";
return false;
}
if(data.Length % imageInfo.SectorSize != 0)
{
ErrorMessage = "Incorrect data size";
return false;
}
if(sectorAddress + length > imageInfo.Sectors)
{
ErrorMessage = "Tried to write past image size";
return false;
}
// Ignore empty sectors
if(ArrayHelpers.ArrayIsNullOrEmpty(data))
{
if(currentChunk.type == CHUNK_TYPE_COPY)
{
chunks.Add(currentChunk.sector, currentChunk);
currentChunk = new BlockChunk {type = CHUNK_TYPE_NOCOPY, sector = currentSector};
}
currentChunk.sectors += (ulong)(data.Length / imageInfo.SectorSize);
currentSector += (ulong)(data.Length / imageInfo.SectorSize);
masterChecksum.Update(data);
ErrorMessage = "";
return true;
}
for(uint i = 0; i < length; i++)
{
byte[] tmp = new byte[imageInfo.SectorSize];
Array.Copy(data, i * imageInfo.SectorSize, tmp, 0, imageInfo.SectorSize);
if(!WriteSector(tmp, sectorAddress + i)) return false;
}
ErrorMessage = "";
return true;
}
public bool WriteSectorLong(byte[] data, ulong sectorAddress)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool SetTracks(List<Track> tracks)
{
ErrorMessage = "Unsupported feature";
return false;
}
public bool Close()
{
if(!IsWriting)
{
ErrorMessage = "Image is not opened for writing";
return false;
}
if(currentChunk.type != CHUNK_TYPE_NOCOPY) currentChunk.length = currentChunk.sectors * 512;
chunks.Add(currentChunk.sector, currentChunk);
chunks.Add(imageInfo.Sectors, new BlockChunk {type = CHUNK_TYPE_END, sector = imageInfo.Sectors});
BlockHeader bHdr = new BlockHeader
{
signature = CHUNK_SIGNATURE,
version = 1,
sectorCount = imageInfo.Sectors,
checksumType = UDIF_CHECKSUM_TYPE_CRC32,
checksumLen = 32,
checksum = BitConverter.ToUInt32(dataForkChecksum.Final().Reverse().ToArray(), 0),
chunks = (uint)chunks.Count
};
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
MemoryStream chunkMs = new MemoryStream();
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.signature), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.version), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.sectorStart), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.sectorCount), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.dataOffset), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.buffers), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.descriptor), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved1), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved2), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved3), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved4), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved5), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.reserved6), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.checksumType), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.checksumLen), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.checksum), 0, 4);
chunkMs.Write(new byte[124], 0, 124);
chunkMs.Write(BigEndianBitConverter.GetBytes(bHdr.chunks), 0, 4);
foreach(BlockChunk chunk in chunks.Values)
{
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.type), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.comment), 0, 4);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.sector), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.sectors), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.offset), 0, 8);
chunkMs.Write(BigEndianBitConverter.GetBytes(chunk.length), 0, 8);
}
byte[] plist = Encoding.UTF8.GetBytes(new NSDictionary
{
{
"resource-fork",
new NSDictionary
{
{
"blkx",
new NSArray
{
new NSDictionary
{
{"Attributes", "0x0050"},
{"CFName", "whole disk (DiscImageChef : 0)"},
{"Data", chunkMs.ToArray()},
{"ID", "0"},
{"Name", "whole disk (DiscImageChef : 0)"}
}
}
}
}
}
}.ToXmlPropertyList());
footer = new UdifFooter
{
signature = UDIF_SIGNATURE,
version = 4,
headerSize = 512,
flags = 1,
dataForkLen = (ulong)writingStream.Length,
segmentNumber = 1,
segmentCount = 1,
segmentId = Guid.NewGuid(),
dataForkChkType = UDIF_CHECKSUM_TYPE_CRC32,
dataForkChkLen = 32,
dataForkChk = BitConverter.ToUInt32(dataForkChecksum.Final().Reverse().ToArray(), 0),
plistOff = (ulong)writingStream.Length,
plistLen = (ulong)plist.Length,
// TODO: Find how is this calculated
/*masterChkType = 2,
masterChkLen = 32,
masterChk = BitConverter.ToUInt32(masterChecksum.Final().Reverse().ToArray(), 0),*/
imageVariant = 2,
sectorCount = imageInfo.Sectors
};
writingStream.Seek(0, SeekOrigin.End);
writingStream.Write(plist, 0, plist.Length);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.signature), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.version), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.headerSize), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.flags), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.runningDataForkOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkLen), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.rsrcForkOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.rsrcForkLen), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.segmentNumber), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.segmentCount), 0, 4);
writingStream.Write(footer.segmentId.ToByteArray(), 0, 16);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkChkType), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkChkLen), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.dataForkChk), 0, 4);
writingStream.Write(new byte[124], 0, 124);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.plistOff), 0, 8);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.plistLen), 0, 8);
writingStream.Write(new byte[120], 0, 120);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.masterChkType), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.masterChkLen), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.masterChk), 0, 4);
writingStream.Write(new byte[124], 0, 124);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.imageVariant), 0, 4);
writingStream.Write(BigEndianBitConverter.GetBytes(footer.sectorCount), 0, 8);
writingStream.Write(new byte[12], 0, 12);
writingStream.Flush();
writingStream.Close();
IsWriting = false;
ErrorMessage = "";
return true;
}
// TODO: Comments
public bool SetMetadata(ImageInfo metadata)
{
return true;
}
public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
{
// Not stored in image
return true;
}
public bool WriteSectorTag(byte[] data, ulong sectorAddress, SectorTagType tag)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool WriteSectorsTag(byte[] data, ulong sectorAddress, uint length, SectorTagType tag)
{
ErrorMessage = "Writing sectors with tags is not supported.";
return false;
}
public bool SetDumpHardware(List<DumpHardwareType> dumpHardware)
{
// Not supported
return false;
}
public bool SetCicmMetadata(CICMMetadataType metadata)
{
// Not supported
return false;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct UdifFooter
{
public uint signature;
public uint version;
public uint headerSize;
public uint flags;
public ulong runningDataForkOff;
public ulong dataForkOff;
public ulong dataForkLen;
public ulong rsrcForkOff;
public ulong rsrcForkLen;
public uint segmentNumber;
public uint segmentCount;
public Guid segmentId;
public uint dataForkChkType;
public uint dataForkChkLen;
public uint dataForkChk;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 124)]
public byte[] reserved1;
public ulong plistOff;
public ulong plistLen;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 120)]
public byte[] reserved2;
public uint masterChkType;
public uint masterChkLen;
public uint masterChk;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 124)]
public byte[] reserved3;
public uint imageVariant;
public ulong sectorCount;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
public byte[] reserved4;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct BlockHeader
{
public uint signature;
public uint version;
public ulong sectorStart;
public ulong sectorCount;
public ulong dataOffset;
public uint buffers;
public uint descriptor;
public uint reserved1;
public uint reserved2;
public uint reserved3;
public uint reserved4;
public uint reserved5;
public uint reserved6;
public uint checksumType;
public uint checksumLen;
public uint checksum;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 124)]
public byte[] reservedChk;
public uint chunks;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct BlockChunk
{
public uint type;
public uint comment;
public ulong sector;
public ulong sectors;
public ulong offset;
public ulong length;
}
}
}
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