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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.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;
}
public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
{
information = "";
StringBuilder ISOMetadata = new StringBuilder();
bool RockRidge = false;
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;
// 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 = imagePlugin.GetSectorSize() == 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;
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) // Recognized, it is an ISO9660, now check for rest of data.
{
if(counter == 0)
return;
break;
}
switch(VDType)
{
case 0: // TODO
{
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";
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
{
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)
{
information = "ERROR: Could not find primary volume descriptor";
return;
}
if(HighSierra)
decodedVD = DecodeVolumeDescriptor(hsvd.Value);
else
decodedVD = DecodeVolumeDescriptor(pvd.Value);
if(jolietvd != null)
decodedJolietVD = DecodeJolietDescriptor(jolietvd.Value);
ulong i = (ulong)BitConverter.ToInt32(VDPathTableStart, 0);
DicConsole.DebugWriteLine("ISO9660 plugin", "VDPathTableStart = {0} + {1} = {2}", i, partition.Start, i + partition.Start);
// TODO: Check this
/*
if((i + partition.Start) < partition.End)
{
byte[] path_table = imagePlugin.ReadSector(i + partition.Start);
Array.Copy(path_table, 2, RootDirectoryLocation, 0, 4);
// Check for Rock Ridge
byte[] root_dir = imagePlugin.ReadSector((ulong)BitConverter.ToInt32(RootDirectoryLocation, 0) + partition.Start);
byte[] SUSPMagic = new byte[2];
byte[] RRMagic = new byte[2];
Array.Copy(root_dir, 0x22, SUSPMagic, 0, 2);
if(CurrentEncoding.GetString(SUSPMagic) == "SP")
{
Array.Copy(root_dir, 0x29, RRMagic, 0, 2);
RockRidge |= CurrentEncoding.GetString(RRMagic) == "RR";
}
}*/
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);
ISOMetadata.AppendFormat("{0} file system", HighSierra ? "High Sierra Format" : "ISO9660").AppendLine();
if(jolietvd != null)
ISOMetadata.AppendFormat("Joliet extensions present.").AppendLine();
if(RockRidge)
ISOMetadata.AppendFormat("Rock Ridge Interchange Protocol present.").AppendLine();
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();
}
xmlFSType.Type = HighSierra ? "High Sierra Format" : "ISO9660";
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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