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Aaru/DiscImageChef.Filesystems/ISO9660/Info.cs

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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : Info.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Component
//
// --[ Description ] ----------------------------------------------------------
//
// Description
//
// --[ 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 © 2011-2017 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
namespace DiscImageChef.Filesystems.ISO9660
{
public partial class ISO9660 : Filesystem
{
public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
{
byte VDType;
// ISO9660 is designed for 2048 bytes/sector devices
if(imagePlugin.GetSectorSize() < 2048)
return false;
// ISO9660 Primary Volume Descriptor starts at sector 16, so that's minimal size.
if(partition.End <= (16 + partition.Start))
return false;
// Read to Volume Descriptor
byte[] vd_sector = imagePlugin.ReadSector(16 + partition.Start);
int xa_off = 0;
if(vd_sector.Length == 2336)
xa_off = 8;
VDType = vd_sector[0 + xa_off];
byte[] VDMagic = new byte[5];
byte[] HSMagic = new byte[5];
// This indicates the end of a volume descriptor. HighSierra here would have 16 so no problem
if(VDType == 255)
return false;
Array.Copy(vd_sector, 0x001 + xa_off, VDMagic, 0, 5);
Array.Copy(vd_sector, 0x009 + xa_off, HSMagic, 0, 5);
DicConsole.DebugWriteLine("ISO9660 plugin", "VDMagic = {0}", CurrentEncoding.GetString(VDMagic));
DicConsole.DebugWriteLine("ISO9660 plugin", "HSMagic = {0}", CurrentEncoding.GetString(HSMagic));
return CurrentEncoding.GetString(VDMagic) == IsoMagic || CurrentEncoding.GetString(HSMagic) == HighSierraMagic || CurrentEncoding.GetString(VDMagic) == CdiMagic;
}
public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
{
information = "";
StringBuilder ISOMetadata = new StringBuilder();
byte VDType; // Volume Descriptor Type, should be 1 or 2.
byte[] VDMagic = new byte[5]; // Volume Descriptor magic "CD001"
byte[] HSMagic = new byte[5]; // Volume Descriptor magic "CDROM"
string BootSpec = "";
byte[] VDPathTableStart = new byte[4];
byte[] RootDirectoryLocation = new byte[4];
PrimaryVolumeDescriptor? pvd = null;
PrimaryVolumeDescriptor? jolietvd = null;
BootRecord? bvd = null;
HighSierraPrimaryVolumeDescriptor? hsvd = null;
FileStructureVolumeDescriptor? fsvd = null;
ElToritoBootRecord? torito = null;
// ISO9660 is designed for 2048 bytes/sector devices
if(imagePlugin.GetSectorSize() < 2048)
return;
// ISO9660 Primary Volume Descriptor starts at sector 16, so that's minimal size.
if(partition.End < 16)
return;
ulong counter = 0;
byte[] vd_sector = imagePlugin.ReadSector(16 + counter + partition.Start);
int xa_off = vd_sector.Length == 2336 ? 8 : 0;
Array.Copy(vd_sector, 0x009 + xa_off, HSMagic, 0, 5);
bool HighSierra = CurrentEncoding.GetString(HSMagic) == HighSierraMagic;
int hs_off = 0;
if(HighSierra)
hs_off = 8;
bool CDi = false;
while(true)
{
DicConsole.DebugWriteLine("ISO9660 plugin", "Processing VD loop no. {0}", counter);
// Seek to Volume Descriptor
DicConsole.DebugWriteLine("ISO9660 plugin", "Reading sector {0}", 16 + counter + partition.Start);
byte[] vd_sector_tmp = imagePlugin.ReadSector(16 + counter + partition.Start);
vd_sector = new byte[vd_sector_tmp.Length - xa_off];
Array.Copy(vd_sector_tmp, xa_off, vd_sector, 0, vd_sector.Length);
VDType = vd_sector[0 + hs_off];
DicConsole.DebugWriteLine("ISO9660 plugin", "VDType = {0}", VDType);
if(VDType == 255) // Supposedly we are in the PVD.
{
if(counter == 0)
return;
break;
}
Array.Copy(vd_sector, 0x001, VDMagic, 0, 5);
Array.Copy(vd_sector, 0x009, HSMagic, 0, 5);
if(CurrentEncoding.GetString(VDMagic) != IsoMagic && CurrentEncoding.GetString(HSMagic) != HighSierraMagic && CurrentEncoding.GetString(VDMagic) != CdiMagic) // Recognized, it is an ISO9660, now check for rest of data.
{
if(counter == 0)
return;
break;
}
CDi |= CurrentEncoding.GetString(VDMagic) == CdiMagic;
switch(VDType)
{
case 0:
{
bvd = new BootRecord();
IntPtr ptr = Marshal.AllocHGlobal(2048);
Marshal.Copy(vd_sector, hs_off, ptr, 2048 - hs_off);
bvd = (BootRecord)Marshal.PtrToStructure(ptr, typeof(BootRecord));
Marshal.FreeHGlobal(ptr);
BootSpec = "Unknown";
if(CurrentEncoding.GetString(bvd.Value.system_id).Substring(0, 23) == "EL TORITO SPECIFICATION")
{
BootSpec = "El Torito";
torito = new ElToritoBootRecord();
ptr = Marshal.AllocHGlobal(2048);
Marshal.Copy(vd_sector, hs_off, ptr, 2048 - hs_off);
torito = (ElToritoBootRecord)Marshal.PtrToStructure(ptr, typeof(ElToritoBootRecord));
Marshal.FreeHGlobal(ptr);
}
break;
}
case 1:
{
if(HighSierra)
{
hsvd = new HighSierraPrimaryVolumeDescriptor();
IntPtr ptr = Marshal.AllocHGlobal(2048);
Marshal.Copy(vd_sector, 0, ptr, 2048);
hsvd = (HighSierraPrimaryVolumeDescriptor)Marshal.PtrToStructure(ptr, typeof(HighSierraPrimaryVolumeDescriptor));
Marshal.FreeHGlobal(ptr);
}
else if(CDi)
fsvd = BigEndianMarshal.ByteArrayToStructureBigEndian<FileStructureVolumeDescriptor>(vd_sector);
else
{
pvd = new PrimaryVolumeDescriptor();
IntPtr ptr = Marshal.AllocHGlobal(2048);
Marshal.Copy(vd_sector, 0, ptr, 2048);
pvd = (PrimaryVolumeDescriptor)Marshal.PtrToStructure(ptr, typeof(PrimaryVolumeDescriptor));
Marshal.FreeHGlobal(ptr);
}
break;
}
case 2:
{
PrimaryVolumeDescriptor svd = new PrimaryVolumeDescriptor();
IntPtr ptr = Marshal.AllocHGlobal(2048);
Marshal.Copy(vd_sector, 0, ptr, 2048);
svd = (PrimaryVolumeDescriptor)Marshal.PtrToStructure(ptr, typeof(PrimaryVolumeDescriptor));
Marshal.FreeHGlobal(ptr);
// Check if this is Joliet
if(svd.escape_sequences[0] == '%' && svd.escape_sequences[1] == '/')
{
if(svd.escape_sequences[2] == '@' || svd.escape_sequences[2] == 'C' || svd.escape_sequences[2] == 'E')
{
jolietvd = svd;
}
else
{
break;
}
}
else
DicConsole.WriteLine("ISO9660 plugin", "Found unknown supplementary volume descriptor");
break;
}
}
counter++;
}
DecodedVolumeDescriptor decodedVD = new DecodedVolumeDescriptor();
DecodedVolumeDescriptor decodedJolietVD = new DecodedVolumeDescriptor();
xmlFSType = new Schemas.FileSystemType();
if(pvd == null && hsvd == null && fsvd == null)
{
information = "ERROR: Could not find primary volume descriptor";
return;
}
if(HighSierra)
decodedVD = DecodeVolumeDescriptor(hsvd.Value);
else if(CDi)
decodedVD = DecodeVolumeDescriptor(fsvd.Value);
else
decodedVD = DecodeVolumeDescriptor(pvd.Value);
if(jolietvd != null)
decodedJolietVD = DecodeJolietDescriptor(jolietvd.Value);
uint rootLocation = 0;
uint rootSize = 0;
// No need to read root on CD-i, as extensions are not supported...
if(!CDi)
{
rootLocation = HighSierra ? hsvd.Value.root_directory_record.extent : pvd.Value.root_directory_record.extent;
if(HighSierra)
{
rootSize = hsvd.Value.root_directory_record.size / hsvd.Value.logical_block_size;
if(hsvd.Value.root_directory_record.size % hsvd.Value.logical_block_size > 0)
rootSize++;
}
else
{
rootSize = pvd.Value.root_directory_record.size / pvd.Value.logical_block_size;
if(pvd.Value.root_directory_record.size % pvd.Value.logical_block_size > 0)
rootSize++;
}
}
byte[] root_dir = imagePlugin.ReadSectors(rootLocation + partition.Start, rootSize);
int rootOff = 0;
bool XA = false;
bool Apple = false;
bool SUSP = false;
bool RRIP = false;
bool ziso = false;
bool Amiga = false;
bool AAIP = false;
List<ContinuationArea> contareas = new List<ContinuationArea>();
List<byte[]> refareas = new List<byte[]>();
StringBuilder suspInformation = new StringBuilder();
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
// Walk thru root directory to see system area extensions in use
while(rootOff + Marshal.SizeOf(typeof(DirectoryRecord)) < root_dir.Length && !CDi)
{
DirectoryRecord record = new DirectoryRecord();
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(record));
Marshal.Copy(root_dir, rootOff, ptr, Marshal.SizeOf(record));
record = (DirectoryRecord)Marshal.PtrToStructure(ptr, typeof(DirectoryRecord));
Marshal.FreeHGlobal(ptr);
int sa_off = Marshal.SizeOf(record) + record.name_len;
sa_off += sa_off % 2;
int sa_len = record.length - sa_off;
if(sa_len > 0 && rootOff + sa_off + sa_len <= root_dir.Length)
{
byte[] sa = new byte[sa_len];
Array.Copy(root_dir, rootOff + sa_off, sa, 0, sa_len);
sa_off = 0;
while(sa_off < sa_len)
{
bool noneFound = true;
if(Marshal.SizeOf(typeof(CdromXa)) + sa_off <= sa_len)
{
CdromXa xa = BigEndianMarshal.ByteArrayToStructureBigEndian<CdromXa>(sa);
if(xa.signature == XaMagic)
{
XA = true;
sa_off += Marshal.SizeOf(typeof(CdromXa));
noneFound = false;
}
}
if(sa_off >= sa_len)
break;
ushort nextSignature = BigEndianBitConverter.ToUInt16(sa, sa_off);
// Easy, contains size field
if(nextSignature == AppleMagic)
{
Apple = true;
sa_off += sa[sa_off + 2];
noneFound = false;
}
// Not easy, contains size field
if(nextSignature == AppleMagicOld)
{
Apple = true;
AppleOldId apple_id = (AppleOldId)sa[sa_off + 2];
noneFound = false;
switch(apple_id)
{
case AppleOldId.ProDOS:
sa_off += Marshal.SizeOf(typeof(AppleProDOSOldSystemUse));
break;
case AppleOldId.TypeCreator:
case AppleOldId.TypeCreatorBundle:
sa_off += Marshal.SizeOf(typeof(AppleHFSTypeCreatorSystemUse));
break;
case AppleOldId.TypeCreatorIcon:
case AppleOldId.TypeCreatorIconBundle:
sa_off += Marshal.SizeOf(typeof(AppleHFSIconSystemUse));
break;
case AppleOldId.HFS:
sa_off += Marshal.SizeOf(typeof(AppleHFSOldSystemUse));
break;
}
}
// IEEE-P1281 aka SUSP 1.12
if(nextSignature == SUSP_Indicator)
{
SUSP = true;
sa_off += sa[sa_off + 2];
noneFound = false;
while(sa_off < sa_len)
{
nextSignature = BigEndianBitConverter.ToUInt16(sa, sa_off);
if(nextSignature == AppleMagic)
{
// Can collide with AAIP
if(sa[sa_off + 3] == 1 && sa[sa_off + 2] == 7)
Apple = true;
else Apple |= sa[sa_off + 3] != 1;
}
if(nextSignature == SUSP_Continuation && sa_off + sa[sa_off + 2] <= sa_len)
{
byte[] ce = new byte[sa[sa_off + 2]];
Array.Copy(sa, sa_off, ce, 0, ce.Length);
ContinuationArea ca = BigEndianMarshal.ByteArrayToStructureBigEndian<ContinuationArea>(ce);
contareas.Add(ca);
}
if(nextSignature == SUSP_Reference && sa_off + sa[sa_off + 2] <= sa_len)
{
byte[] er = new byte[sa[sa_off + 2]];
Array.Copy(sa, sa_off, er, 0, er.Length);
refareas.Add(er);
}
RRIP |= nextSignature == RRIP_Magic || nextSignature == RRIP_PosixAttributes ||
nextSignature == RRIP_PosixDevNo || nextSignature == RRIP_Symlink ||
nextSignature == RRIP_Name || nextSignature == RRIP_Childlink ||
nextSignature == RRIP_Parentlink || nextSignature == RRIP_RelocatedDir ||
nextSignature == RRIP_Timestamps || nextSignature == RRIP_Sparse;
ziso |= nextSignature == ziso_Magic;
Amiga |= nextSignature == Amiga_Magic;
AAIP |= nextSignature == AAIP_Magic || (nextSignature == AAIP_OldMagic && sa[sa_off + 3] == 1 && sa[sa_off + 2] >= 9);
sa_off += sa[sa_off + 2];
if(nextSignature == SUSP_Terminator)
break;
}
}
if(noneFound)
break;
}
}
rootOff += record.length;
if(record.length == 0)
break;
}
foreach(ContinuationArea ca in contareas)
{
uint ca_len = (ca.ca_length_be + ca.offset_be) / (HighSierra ? hsvd.Value.logical_block_size : pvd.Value.logical_block_size);
if((ca.ca_length_be + ca.offset_be) % (HighSierra ? hsvd.Value.logical_block_size : pvd.Value.logical_block_size) > 0)
ca_len++;
byte[] ca_sectors = imagePlugin.ReadSectors(ca.block_be, ca_len);
byte[] ca_data = new byte[ca.ca_length_be];
Array.Copy(ca_sectors, ca.offset_be, ca_data, 0, ca.ca_length_be);
int ca_off = 0;
while(ca_off < ca.ca_length_be)
{
ushort nextSignature = BigEndianBitConverter.ToUInt16(ca_data, ca_off);
// Apple never said to include its extensions inside a continuation area, but just in case
if(nextSignature == AppleMagic)
{
// Can collide with AAIP
if(ca_data[ca_off + 3] == 1 && ca_data[ca_off + 2] == 7)
Apple = true;
else Apple |= ca_data[ca_off + 3] != 1;
}
if(nextSignature == SUSP_Reference && ca_off + ca_data[ca_off + 2] <= ca.ca_length_be)
{
byte[] er = new byte[ca_data[ca_off + 2]];
Array.Copy(ca_data, ca_off, er, 0, er.Length);
refareas.Add(er);
}
RRIP |= nextSignature == RRIP_Magic || nextSignature == RRIP_PosixAttributes ||
nextSignature == RRIP_PosixDevNo || nextSignature == RRIP_Symlink ||
nextSignature == RRIP_Name || nextSignature == RRIP_Childlink ||
nextSignature == RRIP_Parentlink || nextSignature == RRIP_RelocatedDir ||
nextSignature == RRIP_Timestamps || nextSignature == RRIP_Sparse;
ziso |= nextSignature == ziso_Magic;
Amiga |= nextSignature == Amiga_Magic;
AAIP |= nextSignature == AAIP_Magic || (nextSignature == AAIP_OldMagic && ca_data[ca_off + 3] == 1 && ca_data[ca_off + 2] >= 9);
ca_off += ca_data[ca_off + 2];
}
}
if(refareas.Count > 0)
{
suspInformation.AppendLine("----------------------------------------");
suspInformation.AppendLine("SYSTEM USE SHARING PROTOCOL INFORMATION:");
suspInformation.AppendLine("----------------------------------------");
counter = 1;
foreach(byte[] erb in refareas)
{
ReferenceArea er = BigEndianMarshal.ByteArrayToStructureBigEndian<ReferenceArea>(erb);
string ext_id = CurrentEncoding.GetString(erb, Marshal.SizeOf(er), er.id_len);
string ext_des = CurrentEncoding.GetString(erb, Marshal.SizeOf(er) + er.id_len, er.des_len);
string ext_src = CurrentEncoding.GetString(erb, Marshal.SizeOf(er) + er.id_len + er.des_len, er.src_len);
suspInformation.AppendFormat("Extension: {0}", counter).AppendLine();
suspInformation.AppendFormat("\tID: {0}, version {1}", ext_id, er.ext_ver).AppendLine();
suspInformation.AppendFormat("\tDescription: {0}", ext_des).AppendLine();
suspInformation.AppendFormat("\tSource: {0}", ext_src).AppendLine();
counter++;
}
}
byte[] ipbin_sector = imagePlugin.ReadSector(0 + partition.Start);
Decoders.Sega.CD.IPBin? SegaCD = Decoders.Sega.CD.DecodeIPBin(ipbin_sector);
Decoders.Sega.Saturn.IPBin? Saturn = Decoders.Sega.Saturn.DecodeIPBin(ipbin_sector);
Decoders.Sega.Dreamcast.IPBin? Dreamcast = Decoders.Sega.Dreamcast.DecodeIPBin(ipbin_sector);
string fsFormat;
if(HighSierra)
fsFormat = "High Sierra Format";
else if (CDi)
fsFormat = "CD-i";
else
fsFormat = "ISO9660";
ISOMetadata.AppendFormat("{0} file system", fsFormat).AppendLine();
if(XA)
ISOMetadata.AppendLine("CD-ROM XA extensions present.");
if(Apple)
ISOMetadata.AppendLine("Apple extensions present.");
if(jolietvd != null)
ISOMetadata.AppendLine("Joliet extensions present.");
if(SUSP)
ISOMetadata.AppendLine("System Use Sharing Protocol present.");
if(RRIP)
ISOMetadata.AppendLine("Rock Ridge Interchange Protocol present.");
if(AAIP)
ISOMetadata.AppendLine("Arbitrary Attribute Interchange Protocol present.");
if(ziso)
ISOMetadata.AppendLine("zisofs compression present.");
if(bvd != null)
ISOMetadata.AppendFormat("Disc bootable following {0} specifications.", BootSpec).AppendLine();
if(SegaCD != null)
{
ISOMetadata.AppendLine("This is a SegaCD / MegaCD disc.");
ISOMetadata.AppendLine(Decoders.Sega.CD.Prettify(SegaCD));
}
if(Saturn != null)
{
ISOMetadata.AppendLine("This is a Sega Saturn disc.");
ISOMetadata.AppendLine(Decoders.Sega.Saturn.Prettify(Saturn));
}
if(Dreamcast != null)
{
ISOMetadata.AppendLine("This is a Sega Dreamcast disc.");
ISOMetadata.AppendLine(Decoders.Sega.Dreamcast.Prettify(Dreamcast));
}
ISOMetadata.AppendLine("------------------------------");
ISOMetadata.AppendLine("VOLUME DESCRIPTOR INFORMATION:");
ISOMetadata.AppendLine("------------------------------");
ISOMetadata.AppendFormat("System identifier: {0}", decodedVD.SystemIdentifier).AppendLine();
ISOMetadata.AppendFormat("Volume identifier: {0}", decodedVD.VolumeIdentifier).AppendLine();
ISOMetadata.AppendFormat("Volume set identifier: {0}", decodedVD.VolumeSetIdentifier).AppendLine();
ISOMetadata.AppendFormat("Publisher identifier: {0}", decodedVD.PublisherIdentifier).AppendLine();
ISOMetadata.AppendFormat("Data preparer identifier: {0}", decodedVD.DataPreparerIdentifier).AppendLine();
ISOMetadata.AppendFormat("Application identifier: {0}", decodedVD.ApplicationIdentifier).AppendLine();
ISOMetadata.AppendFormat("Volume creation date: {0}", decodedVD.CreationTime).AppendLine();
if(decodedVD.HasModificationTime)
ISOMetadata.AppendFormat("Volume modification date: {0}", decodedVD.ModificationTime).AppendLine();
else
ISOMetadata.AppendFormat("Volume has not been modified.").AppendLine();
if(decodedVD.HasExpirationTime)
ISOMetadata.AppendFormat("Volume expiration date: {0}", decodedVD.ExpirationTime).AppendLine();
else
ISOMetadata.AppendFormat("Volume does not expire.").AppendLine();
if(decodedVD.HasEffectiveTime)
ISOMetadata.AppendFormat("Volume effective date: {0}", decodedVD.EffectiveTime).AppendLine();
else
ISOMetadata.AppendFormat("Volume has always been effective.").AppendLine();
ISOMetadata.AppendFormat("Volume has {0} blocks of {1} bytes each", decodedVD.Blocks, decodedVD.BlockSize).AppendLine();
if(jolietvd != null)
{
ISOMetadata.AppendLine("-------------------------------------");
ISOMetadata.AppendLine("JOLIET VOLUME DESCRIPTOR INFORMATION:");
ISOMetadata.AppendLine("-------------------------------------");
ISOMetadata.AppendFormat("System identifier: {0}", decodedJolietVD.SystemIdentifier).AppendLine();
ISOMetadata.AppendFormat("Volume identifier: {0}", decodedJolietVD.VolumeIdentifier).AppendLine();
ISOMetadata.AppendFormat("Volume set identifier: {0}", decodedJolietVD.VolumeSetIdentifier).AppendLine();
ISOMetadata.AppendFormat("Publisher identifier: {0}", decodedJolietVD.PublisherIdentifier).AppendLine();
ISOMetadata.AppendFormat("Data preparer identifier: {0}", decodedJolietVD.DataPreparerIdentifier).AppendLine();
ISOMetadata.AppendFormat("Application identifier: {0}", decodedJolietVD.ApplicationIdentifier).AppendLine();
ISOMetadata.AppendFormat("Volume creation date: {0}", decodedJolietVD.CreationTime).AppendLine();
if(decodedJolietVD.HasModificationTime)
ISOMetadata.AppendFormat("Volume modification date: {0}", decodedJolietVD.ModificationTime).AppendLine();
else
ISOMetadata.AppendFormat("Volume has not been modified.").AppendLine();
if(decodedJolietVD.HasExpirationTime)
ISOMetadata.AppendFormat("Volume expiration date: {0}", decodedJolietVD.ExpirationTime).AppendLine();
else
ISOMetadata.AppendFormat("Volume does not expire.").AppendLine();
if(decodedJolietVD.HasEffectiveTime)
ISOMetadata.AppendFormat("Volume effective date: {0}", decodedJolietVD.EffectiveTime).AppendLine();
else
ISOMetadata.AppendFormat("Volume has always been effective.").AppendLine();
}
if(torito != null)
{
vd_sector = imagePlugin.ReadSector(torito.Value.catalog_sector + partition.Start);
Checksums.SHA1Context sha1Ctx = new Checksums.SHA1Context();
sha1Ctx.Init();
byte[] boot_image;
int torito_off = 0;
if(vd_sector[torito_off] != 1)
goto exit_torito;
ElToritoValidationEntry valentry = new ElToritoValidationEntry();
IntPtr ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
valentry = (ElToritoValidationEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoValidationEntry));
Marshal.FreeHGlobal(ptr);
if(valentry.signature != ElToritoMagic)
goto exit_torito;
torito_off += ElToritoEntrySize;
ElToritoInitialEntry initial_entry = new ElToritoInitialEntry();
ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
initial_entry = (ElToritoInitialEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoInitialEntry));
Marshal.FreeHGlobal(ptr);
initial_entry.boot_type = (ElToritoEmulation)((byte)initial_entry.boot_type & 0xF);
boot_image = imagePlugin.ReadSectors(initial_entry.load_rba + partition.Start, initial_entry.sector_count);
ISOMetadata.AppendLine("----------------------");
ISOMetadata.AppendLine("EL TORITO INFORMATION:");
ISOMetadata.AppendLine("----------------------");
ISOMetadata.AppendLine("Initial entry:");
ISOMetadata.AppendFormat("\tDeveloper ID: {0}", CurrentEncoding.GetString(valentry.developer_id)).AppendLine();
if(initial_entry.bootable == ElToritoIndicator.Bootable)
{
ISOMetadata.AppendFormat("\tBootable on {0}", valentry.platform_id).AppendLine();
ISOMetadata.AppendFormat("\tBootable image starts at sector {0} and runs for {1} sectors", initial_entry.load_rba, initial_entry.sector_count).AppendLine();
if(valentry.platform_id == ElToritoPlatform.x86)
ISOMetadata.AppendFormat("\tBootable image will be loaded at segment {0:X4}h", initial_entry.load_seg == 0 ? 0x7C0 : initial_entry.load_seg).AppendLine();
else
ISOMetadata.AppendFormat("\tBootable image will be loaded at 0x{0:X8}", (uint)initial_entry.load_seg * 10).AppendLine();
switch(initial_entry.boot_type)
{
case ElToritoEmulation.None:
ISOMetadata.AppendLine("\tImage uses no emulation");
break;
case ElToritoEmulation.Md2hd:
ISOMetadata.AppendLine("\tImage emulates a 5.25\" high-density (MD2HD, 1.2Mb) floppy");
break;
case ElToritoEmulation.Mf2hd:
ISOMetadata.AppendLine("\tImage emulates a 3.5\" high-density (MF2HD, 1.44Mb) floppy");
break;
case ElToritoEmulation.Mf2ed:
ISOMetadata.AppendLine("\tImage emulates a 3.5\" extra-density (MF2ED, 2.88Mb) floppy");
break;
default:
ISOMetadata.AppendFormat("\tImage uses unknown emulation type {0}", (byte)initial_entry.boot_type).AppendLine();
break;
}
ISOMetadata.AppendFormat("\tSystem type: 0x{0:X2}", initial_entry.system_type).AppendLine();
ISOMetadata.AppendFormat("\tBootable image's SHA1: {0}", sha1Ctx.Data(boot_image, out byte[] hash)).AppendLine();
}
else
ISOMetadata.AppendLine("\tNot bootable");
torito_off += ElToritoEntrySize;
int section_counter = 2;
while(torito_off < vd_sector.Length && (vd_sector[torito_off] == (byte)ElToritoIndicator.Header || vd_sector[torito_off] == (byte)ElToritoIndicator.LastHeader))
{
ElToritoSectionHeaderEntry section_header = new ElToritoSectionHeaderEntry();
ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
section_header = (ElToritoSectionHeaderEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoSectionHeaderEntry));
Marshal.FreeHGlobal(ptr);
torito_off += ElToritoEntrySize;
ISOMetadata.AppendFormat("Boot section {0}:", section_counter);
ISOMetadata.AppendFormat("\tSection ID: {0}", CurrentEncoding.GetString(section_header.identifier)).AppendLine();
for(int entry_counter = 1; entry_counter <= section_header.entries && torito_off < vd_sector.Length; entry_counter++)
{
ElToritoSectionEntry section_entry = new ElToritoSectionEntry();
ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
section_entry = (ElToritoSectionEntry)Marshal.PtrToStructure(ptr, typeof(ElToritoSectionEntry));
Marshal.FreeHGlobal(ptr);
torito_off += ElToritoEntrySize;
ISOMetadata.AppendFormat("\tEntry {0}:", entry_counter);
if(section_entry.bootable == ElToritoIndicator.Bootable)
{
boot_image = imagePlugin.ReadSectors(section_entry.load_rba + partition.Start, section_entry.sector_count);
ISOMetadata.AppendFormat("\t\tBootable on {0}", section_header.platform_id).AppendLine();
ISOMetadata.AppendFormat("\t\tBootable image starts at sector {0} and runs for {1} sectors", section_entry.load_rba, section_entry.sector_count).AppendLine();
if(valentry.platform_id == ElToritoPlatform.x86)
ISOMetadata.AppendFormat("\t\tBootable image will be loaded at segment {0:X4}h", section_entry.load_seg == 0 ? 0x7C0 : section_entry.load_seg).AppendLine();
else
ISOMetadata.AppendFormat("\t\tBootable image will be loaded at 0x{0:X8}", (uint)section_entry.load_seg * 10).AppendLine();
switch((ElToritoEmulation)((byte)section_entry.boot_type & 0xF))
{
case ElToritoEmulation.None:
ISOMetadata.AppendLine("\t\tImage uses no emulation");
break;
case ElToritoEmulation.Md2hd:
ISOMetadata.AppendLine("\t\tImage emulates a 5.25\" high-density (MD2HD, 1.2Mb) floppy");
break;
case ElToritoEmulation.Mf2hd:
ISOMetadata.AppendLine("\t\tImage emulates a 3.5\" high-density (MF2HD, 1.44Mb) floppy");
break;
case ElToritoEmulation.Mf2ed:
ISOMetadata.AppendLine("\t\tImage emulates a 3.5\" extra-density (MF2ED, 2.88Mb) floppy");
break;
default:
ISOMetadata.AppendFormat("\t\tImage uses unknown emulation type {0}", (byte)initial_entry.boot_type).AppendLine();
break;
}
ISOMetadata.AppendFormat("\t\tSelection criteria type: {0}", section_entry.selection_criteria_type).AppendLine();
ISOMetadata.AppendFormat("\t\tSystem type: 0x{0:X2}", section_entry.system_type).AppendLine();
ISOMetadata.AppendFormat("\t\tBootable image's SHA1: {0}", sha1Ctx.Data(boot_image, out byte[] hash)).AppendLine();
}
else
ISOMetadata.AppendLine("\t\tNot bootable");
ElToritoFlags flags = (ElToritoFlags)((byte)section_entry.boot_type & 0xF0);
if(flags.HasFlag(ElToritoFlags.ATAPI))
ISOMetadata.AppendLine("\t\tImage contains ATAPI drivers");
if(flags.HasFlag(ElToritoFlags.SCSI))
ISOMetadata.AppendLine("\t\tImage contains SCSI drivers");
if(flags.HasFlag(ElToritoFlags.Continued))
{
while(true && torito_off < vd_sector.Length)
{
ElToritoSectionEntryExtension section_extension = new ElToritoSectionEntryExtension();
ptr = Marshal.AllocHGlobal(ElToritoEntrySize);
Marshal.Copy(vd_sector, torito_off, ptr, ElToritoEntrySize);
section_extension = (ElToritoSectionEntryExtension)Marshal.PtrToStructure(ptr, typeof(ElToritoSectionEntryExtension));
Marshal.FreeHGlobal(ptr);
torito_off += ElToritoEntrySize;
if(!section_extension.extension_flags.HasFlag(ElToritoFlags.Continued))
break;
}
}
}
if(section_header.header_id == ElToritoIndicator.LastHeader)
break;
}
}
exit_torito:
if(refareas.Count > 0)
ISOMetadata.Append(suspInformation.ToString());
xmlFSType.Type = fsFormat;
if(jolietvd != null)
{
xmlFSType.VolumeName = decodedJolietVD.VolumeIdentifier;
if(decodedJolietVD.SystemIdentifier == null || decodedVD.SystemIdentifier.Length > decodedJolietVD.SystemIdentifier.Length)
xmlFSType.SystemIdentifier = decodedVD.SystemIdentifier;
else
xmlFSType.SystemIdentifier = decodedJolietVD.SystemIdentifier;
if(decodedJolietVD.VolumeSetIdentifier == null || decodedVD.VolumeSetIdentifier.Length > decodedJolietVD.VolumeSetIdentifier.Length)
xmlFSType.VolumeSetIdentifier = decodedVD.VolumeSetIdentifier;
else
xmlFSType.VolumeSetIdentifier = decodedJolietVD.VolumeSetIdentifier;
if(decodedJolietVD.PublisherIdentifier == null || decodedVD.PublisherIdentifier.Length > decodedJolietVD.PublisherIdentifier.Length)
xmlFSType.PublisherIdentifier = decodedVD.PublisherIdentifier;
else
xmlFSType.PublisherIdentifier = decodedJolietVD.PublisherIdentifier;
if(decodedJolietVD.DataPreparerIdentifier == null || decodedVD.DataPreparerIdentifier.Length > decodedJolietVD.DataPreparerIdentifier.Length)
xmlFSType.DataPreparerIdentifier = decodedVD.DataPreparerIdentifier;
else
xmlFSType.DataPreparerIdentifier = decodedJolietVD.SystemIdentifier;
if(decodedJolietVD.ApplicationIdentifier == null || decodedVD.ApplicationIdentifier.Length > decodedJolietVD.ApplicationIdentifier.Length)
xmlFSType.ApplicationIdentifier = decodedVD.ApplicationIdentifier;
else
xmlFSType.ApplicationIdentifier = decodedJolietVD.SystemIdentifier;
xmlFSType.CreationDate = decodedJolietVD.CreationTime;
xmlFSType.CreationDateSpecified = true;
if(decodedJolietVD.HasModificationTime)
{
xmlFSType.ModificationDate = decodedJolietVD.ModificationTime;
xmlFSType.ModificationDateSpecified = true;
}
if(decodedJolietVD.HasExpirationTime)
{
xmlFSType.ExpirationDate = decodedJolietVD.ExpirationTime;
xmlFSType.ExpirationDateSpecified = true;
}
if(decodedJolietVD.HasEffectiveTime)
{
xmlFSType.EffectiveDate = decodedJolietVD.EffectiveTime;
xmlFSType.EffectiveDateSpecified = true;
}
}
else
{
xmlFSType.SystemIdentifier = decodedVD.SystemIdentifier;
xmlFSType.VolumeName = decodedVD.VolumeIdentifier;
xmlFSType.VolumeSetIdentifier = decodedVD.VolumeSetIdentifier;
xmlFSType.PublisherIdentifier = decodedVD.PublisherIdentifier;
xmlFSType.DataPreparerIdentifier = decodedVD.DataPreparerIdentifier;
xmlFSType.ApplicationIdentifier = decodedVD.ApplicationIdentifier;
xmlFSType.CreationDate = decodedVD.CreationTime;
xmlFSType.CreationDateSpecified = true;
if(decodedVD.HasModificationTime)
{
xmlFSType.ModificationDate = decodedVD.ModificationTime;
xmlFSType.ModificationDateSpecified = true;
}
if(decodedVD.HasExpirationTime)
{
xmlFSType.ExpirationDate = decodedVD.ExpirationTime;
xmlFSType.ExpirationDateSpecified = true;
}
if(decodedVD.HasEffectiveTime)
{
xmlFSType.EffectiveDate = decodedVD.EffectiveTime;
xmlFSType.EffectiveDateSpecified = true;
}
}
xmlFSType.Bootable |= bvd != null || SegaCD != null || Saturn != null || Dreamcast != null;
xmlFSType.Clusters = decodedVD.Blocks;
xmlFSType.ClusterSize = decodedVD.BlockSize;
information = ISOMetadata.ToString();
}
}
}
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