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Corrected detection and reading of misaligned partitions on

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optical media (e.g. map says sector 17 on 512 byte units, that
	would fall on sector 4.25 on 2048 units).
This commit is contained in:
Natalia Portillo
2017-07-20 13:14:12 +01:00
parent 290cb74540
commit 9df8dee93d
3 changed files with 129 additions and 69 deletions
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55
DiscImageChef.Filesystems/AppleHFS.cs
View File

@@ -81,25 +81,17 @@ namespace DiscImageChef.Filesystems
if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448 || imagePlugin.GetSectorSize() == 2048)
{
mdb_sector = imagePlugin.ReadSector(2 + partition.Start);
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0);
mdb_sector = imagePlugin.ReadSectors(partition.Start, 2);
foreach(int offset in new[] { 0, 0x200, 0x400, 0x600, 0x800, 0xA00 })
{
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, offset);
if(drSigWord == HFS_MAGIC)
{
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0x7C); // Seek to embedded HFS+ signature
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, offset + 0x7C); // Seek to embedded HFS+ signature
return drSigWord != HFSP_MAGIC;
}
mdb_sector = Read2048SectorAs512(imagePlugin, 2 + partition.Start * 4);
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0);
if(drSigWord == HFS_MAGIC)
{
DicConsole.DebugWriteLine("HFS plugin", "HFS sector size is 512 bytes, but device's 2048");
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0x7C); // Seek to embedded HFS+ signature
return drSigWord != HFSP_MAGIC;
}
}
else
@@ -126,37 +118,35 @@ namespace DiscImageChef.Filesystems
HFS_MasterDirectoryBlock MDB = new HFS_MasterDirectoryBlock();
HFS_BootBlock BB = new HFS_BootBlock();
byte[] pString;
byte[] bb_sector;
byte[] mdb_sector;
byte[] bb_sector = null;
byte[] mdb_sector = null;
ushort drSigWord;
bool APMFromHDDOnCD = false;
// TODO: I don't like this, I can do better
if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448 || imagePlugin.GetSectorSize() == 2048)
{
mdb_sector = imagePlugin.ReadSector(2 + partition.Start);
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0);
byte[] tmp_sector = imagePlugin.ReadSectors(partition.Start, 2);
foreach(int offset in new[] { 0, 0x200, 0x400, 0x600, 0x800, 0xA00 })
{
drSigWord = BigEndianBitConverter.ToUInt16(tmp_sector, offset);
if(drSigWord == HFS_MAGIC)
{
bb_sector = imagePlugin.ReadSector(partition.Start);
}
else
{
mdb_sector = Read2048SectorAs512(imagePlugin, 2 + partition.Start * 4);
drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0);
if(drSigWord == HFS_MAGIC)
{
bb_sector = Read2048SectorAs512(imagePlugin, partition.Start * 4);
bb_sector = new byte[1024];
mdb_sector = new byte[512];
if(offset >= 0x400)
Array.Copy(tmp_sector, offset - 0x400, bb_sector, 0, 1024);
Array.Copy(tmp_sector, offset, mdb_sector, 0, 512);
APMFromHDDOnCD = true;
break;
}
else
}
if(!APMFromHDDOnCD)
return;
}
}
else
{
mdb_sector = imagePlugin.ReadSector(2 + partition.Start);
@@ -174,7 +164,7 @@ namespace DiscImageChef.Filesystems
sb.AppendLine("Apple Hierarchical File System");
sb.AppendLine();
if(APMFromHDDOnCD)
sb.AppendLine("HFS uses 512 bytes/sector while devices uses 2048 bytes/sector.").AppendLine();
sb.AppendLine("HFS uses 512 bytes/sector while device uses 2048 bytes/sector.").AppendLine();
sb.AppendLine("Master Directory Block:");
sb.AppendFormat("Creation date: {0}", DateHandlers.MacToDateTime(MDB.drCrDate)).AppendLine();
sb.AppendFormat("Last modification date: {0}", DateHandlers.MacToDateTime(MDB.drLsMod)).AppendLine();
@@ -235,6 +225,7 @@ namespace DiscImageChef.Filesystems
sb.AppendFormat("CNID of previously opened directory: {0}", MDB.drFndrInfo2).AppendLine();
sb.AppendFormat("CNID of bootable Mac OS 8 or 9 directory: {0}", MDB.drFndrInfo3).AppendLine();
sb.AppendFormat("CNID of bootable Mac OS X directory: {0}", MDB.drFndrInfo5).AppendLine();
if(MDB.drFndrInfo6 != 0 && MDB.drFndrInfo7 != 0)
sb.AppendFormat("Mac OS X Volume ID: {0:X8}{1:X8}", MDB.drFndrInfo6, MDB.drFndrInfo7).AppendLine();
if(MDB.drEmbedSigWord == HFSP_MAGIC)

49
DiscImageChef.Filesystems/AppleHFSPlus.cs
View File

@@ -35,6 +35,7 @@ using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
namespace DiscImageChef.Filesystems
{
@@ -82,23 +83,27 @@ namespace DiscImageChef.Filesystems
byte[] vh_sector;
ulong hfsp_offset;
vh_sector = imagePlugin.ReadSector(2 + partition.Start); // Read volume header, of HFS Wrapper MDB
uint sectorsToRead = 0x800 / imagePlugin.ImageInfo.sectorSize;
if(0x800 % imagePlugin.ImageInfo.sectorSize > 0)
sectorsToRead++;
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0); // Check for HFS Wrapper MDB
vh_sector = imagePlugin.ReadSectors(partition.Start, sectorsToRead); // Read volume header, of HFS Wrapper MDB
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x400); // Check for HFS Wrapper MDB
if(drSigWord == HFS_MAGIC) // "BD"
{
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x07C); // Read embedded HFS+ signature
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x47C); // Read embedded HFS+ signature
if(drSigWord == HFSP_MAGIC) // "H+"
{
xdrStABNt = BigEndianBitConverter.ToUInt16(vh_sector, 0x07E); // Starting block number of embedded HFS+ volume
xdrStABNt = BigEndianBitConverter.ToUInt16(vh_sector, 0x47E); // Starting block number of embedded HFS+ volume
drAlBlkSiz = BigEndianBitConverter.ToUInt32(vh_sector, 0x014); // Block size
drAlBlkSiz = BigEndianBitConverter.ToUInt32(vh_sector, 0x414); // Block size
drAlBlSt = BigEndianBitConverter.ToUInt16(vh_sector, 0x01C); // Start of allocated blocks (in 512-byte/block)
drAlBlSt = BigEndianBitConverter.ToUInt16(vh_sector, 0x41C); // Start of allocated blocks (in 512-byte/block)
hfsp_offset = (drAlBlSt + xdrStABNt * (drAlBlkSiz / 512)) * (imagePlugin.GetSectorSize() / 512);
hfsp_offset = (ulong)(((drAlBlSt * 512) + (xdrStABNt * drAlBlkSiz)) / imagePlugin.GetSectorSize());
}
else
{
@@ -110,9 +115,9 @@ namespace DiscImageChef.Filesystems
hfsp_offset = 0;
}
vh_sector = imagePlugin.ReadSector(2 + partition.Start + hfsp_offset); // Read volume header
vh_sector = imagePlugin.ReadSectors(partition.Start + hfsp_offset, sectorsToRead); // Read volume header
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0);
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x400);
if(drSigWord == HFSP_MAGIC || drSigWord == HFSX_MAGIC)
return true;
return false;
@@ -132,23 +137,27 @@ namespace DiscImageChef.Filesystems
bool wrapped;
byte[] vh_sector;
vh_sector = imagePlugin.ReadSector(2 + partition.Start); // Read volume header, of HFS Wrapper MDB
uint sectorsToRead = 0x800 / imagePlugin.ImageInfo.sectorSize;
if(0x800 % imagePlugin.ImageInfo.sectorSize > 0)
sectorsToRead++;
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0); // Check for HFS Wrapper MDB
vh_sector = imagePlugin.ReadSectors(partition.Start, sectorsToRead); // Read volume header, of HFS Wrapper MDB
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x400); // Check for HFS Wrapper MDB
if(drSigWord == HFS_MAGIC) // "BD"
{
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x07C); // Read embedded HFS+ signature
drSigWord = BigEndianBitConverter.ToUInt16(vh_sector, 0x47C); // Read embedded HFS+ signature
if(drSigWord == HFSP_MAGIC) // "H+"
{
xdrStABNt = BigEndianBitConverter.ToUInt16(vh_sector, 0x07E); // Starting block number of embedded HFS+ volume
xdrStABNt = BigEndianBitConverter.ToUInt16(vh_sector, 0x47E); // Starting block number of embedded HFS+ volume
drAlBlkSiz = BigEndianBitConverter.ToUInt32(vh_sector, 0x014); // Block size
drAlBlkSiz = BigEndianBitConverter.ToUInt32(vh_sector, 0x414); // Block size
drAlBlSt = BigEndianBitConverter.ToUInt16(vh_sector, 0x01C); // Start of allocated blocks (in 512-byte/block)
drAlBlSt = BigEndianBitConverter.ToUInt16(vh_sector, 0x41C); // Start of allocated blocks (in 512-byte/block)
hfsp_offset = (drAlBlSt + xdrStABNt * (drAlBlkSiz / 512)) * (imagePlugin.GetSectorSize() / 512);
hfsp_offset = (ulong)(((drAlBlSt * 512) + (xdrStABNt * drAlBlkSiz)) / imagePlugin.GetSectorSize());
wrapped = true;
}
else
@@ -163,9 +172,9 @@ namespace DiscImageChef.Filesystems
wrapped = false;
}
vh_sector = imagePlugin.ReadSector(2 + partition.Start + hfsp_offset); // Read volume header
vh_sector = imagePlugin.ReadSectors(partition.Start + hfsp_offset, sectorsToRead); // Read volume header
HPVH.signature = BigEndianBitConverter.ToUInt16(vh_sector, 0x000);
HPVH.signature = BigEndianBitConverter.ToUInt16(vh_sector, 0x400);
if(HPVH.signature == HFSP_MAGIC || HPVH.signature == HFSX_MAGIC)
{
StringBuilder sb = new StringBuilder();
@@ -177,6 +186,10 @@ namespace DiscImageChef.Filesystems
if(wrapped)
sb.AppendLine("Volume is wrapped inside an HFS volume.");
byte[] tmp = new byte[0x400];
Array.Copy(vh_sector, 0x400, tmp, 0, 0x400);
vh_sector = tmp;
HPVH = BigEndianMarshal.ByteArrayToStructureBigEndian<HFSPlusVolumeHeader>(vh_sector);
if(HPVH.version == 4 || HPVH.version == 5)

58
DiscImageChef.Filesystems/ProDOS.cs
View File

@@ -101,6 +101,25 @@ namespace DiscImageChef.Filesystems
// Blocks 0 and 1 are boot code
byte[] rootDirectoryKeyBlock = imagePlugin.ReadSector(2 + partition.Start);
bool APMFromHDDOnCD = false;
if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448 || imagePlugin.GetSectorSize() == 2048)
{
byte[] tmp = imagePlugin.ReadSectors(partition.Start, 2);
foreach(int offset in new[] { 0, 0x200, 0x400, 0x600, 0x800, 0xA00 })
{
if(BitConverter.ToUInt16(tmp, offset) == 0 &&
(byte)((tmp[offset + 0x04] & ProDOSStorageTypeMask) >> 4) == RootDirectoryType &&
tmp[offset + 0x23] == ProDOSEntryLength &&
tmp[offset + 0x24] == ProDOSEntriesPerBlock)
{
Array.Copy(tmp, offset, rootDirectoryKeyBlock, 0, 0x200);
APMFromHDDOnCD = true;
break;
}
}
}
ushort prePointer = BitConverter.ToUInt16(rootDirectoryKeyBlock, 0);
DicConsole.DebugWriteLine("ProDOS plugin", "prePointer = {0}", prePointer);
@@ -128,6 +147,9 @@ namespace DiscImageChef.Filesystems
return false;
ushort total_blocks = BitConverter.ToUInt16(rootDirectoryKeyBlock, 0x29);
if(APMFromHDDOnCD)
total_blocks /= 4;
DicConsole.DebugWriteLine("ProDOS plugin", "{0} <= ({1} - {2} + 1)? {3}", total_blocks, partition.End, partition.Start, total_blocks <= (partition.End - partition.Start + 1));
return total_blocks <= (partition.End - partition.Start + 1);
}
@@ -139,6 +161,26 @@ namespace DiscImageChef.Filesystems
// Blocks 0 and 1 are boot code
byte[] rootDirectoryKeyBlockBytes = imagePlugin.ReadSector(2 + partition.Start);
bool APMFromHDDOnCD = false;
if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448 || imagePlugin.GetSectorSize() == 2048)
{
byte[] tmp = imagePlugin.ReadSectors(partition.Start, 2);
foreach(int offset in new[] { 0, 0x200, 0x400, 0x600, 0x800, 0xA00 })
{
if(BitConverter.ToUInt16(tmp, offset) == 0 &&
(byte)((tmp[offset + 0x04] & ProDOSStorageTypeMask) >> 4) == RootDirectoryType &&
tmp[offset + 0x23] == ProDOSEntryLength &&
tmp[offset + 0x24] == ProDOSEntriesPerBlock)
{
Array.Copy(tmp, offset, rootDirectoryKeyBlockBytes, 0, 0x200);
APMFromHDDOnCD = true;
break;
}
}
}
ProDOSRootDirectoryKeyBlock rootDirectoryKeyBlock = new ProDOSRootDirectoryKeyBlock();
rootDirectoryKeyBlock.header = new ProDOSRootDirectoryHeader();
@@ -158,6 +200,10 @@ namespace DiscImageChef.Filesystems
temp_timestamp_left = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x1C);
temp_timestamp_right = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x1E);
bool dateCorrect;
try
{
temp_timestamp = (uint)((temp_timestamp_left << 16) + temp_timestamp_right);
year = (int)((temp_timestamp & ProDOSYearMask) >> 25);
month = (int)((temp_timestamp & ProDOSMonthMask) >> 21);
@@ -174,6 +220,12 @@ namespace DiscImageChef.Filesystems
DicConsole.DebugWriteLine("ProDOS plugin", "Datetime field year {0}, month {1}, day {2}, hour {3}, minute {4}.", year, month, day, hour, minute);
rootDirectoryKeyBlock.header.creation_time = new DateTime(year, month, day, hour, minute, 0);
dateCorrect = true;
}
catch(ArgumentOutOfRangeException)
{
dateCorrect = false;
}
rootDirectoryKeyBlock.header.version = rootDirectoryKeyBlockBytes[0x20];
rootDirectoryKeyBlock.header.min_version = rootDirectoryKeyBlockBytes[0x21];
@@ -185,6 +237,9 @@ namespace DiscImageChef.Filesystems
rootDirectoryKeyBlock.header.bit_map_pointer = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x27);
rootDirectoryKeyBlock.header.total_blocks = BitConverter.ToUInt16(rootDirectoryKeyBlockBytes, 0x29);
if(APMFromHDDOnCD)
sbInformation.AppendLine("ProDOS uses 512 bytes/sector while devices uses 2048 bytes/sector.").AppendLine();
if(rootDirectoryKeyBlock.header.version != ProDOSVersion1 || rootDirectoryKeyBlock.header.min_version != ProDOSVersion1)
{
sbInformation.AppendLine("Warning! Detected unknown ProDOS version ProDOS filesystem.");
@@ -202,6 +257,7 @@ namespace DiscImageChef.Filesystems
sbInformation.AppendFormat("Unknown ProDOS version with field {0} is at least required for reading this volume.", rootDirectoryKeyBlock.header.min_version).AppendLine();
sbInformation.AppendFormat("Volume name is {0}", rootDirectoryKeyBlock.header.volume_name).AppendLine();
if(dateCorrect)
sbInformation.AppendFormat("Volume created on {0}", rootDirectoryKeyBlock.header.creation_time).AppendLine();
sbInformation.AppendFormat("{0} bytes per directory entry", rootDirectoryKeyBlock.header.entry_length).AppendLine();
sbInformation.AppendFormat("{0} entries per directory block", rootDirectoryKeyBlock.header.entries_per_block).AppendLine();
@@ -227,7 +283,7 @@ namespace DiscImageChef.Filesystems
xmlFSType = new Schemas.FileSystemType();
xmlFSType.VolumeName = rootDirectoryKeyBlock.header.volume_name;
if(year != 0 || month != 0 || day != 0 || hour != 0 || minute != 0)
if(dateCorrect)
{
xmlFSType.CreationDate = rootDirectoryKeyBlock.header.creation_time;
xmlFSType.CreationDateSpecified = true;