// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : ISO.cs // Author(s) : Natalia Portillo // // Component : ISO9660 filesystem plugin. // // --[ Description ] ---------------------------------------------------------- // // ISO9660 filesystem structures. // // --[ 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 . // // ---------------------------------------------------------------------------- // Copyright © 2011-2018 Natalia Portillo // ****************************************************************************/ using System; using System.Runtime.InteropServices; using System.Text; namespace DiscImageChef.Filesystems.ISO9660 { public partial class ISO9660 { [StructLayout(LayoutKind.Sequential, Pack = 1)] struct PrimaryVolumeDescriptor { public byte type; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)] public byte[] id; public byte version; // Only used in SVDs public byte flags; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] system_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] volume_id; public ulong reserved1; public uint volume_space_size; public uint volume_space_size_be; // Only used in SVDs [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] escape_sequences; public ushort volume_set_size; public ushort volume_set_size_be; public ushort volume_sequence_number; public ushort volume_sequence_number_be; public ushort logical_block_size; public ushort logical_block_size_be; public uint path_table_size; public uint path_table_size_be; public uint type_1_path_table; public uint opt_type_1_path_table; public uint type_m_path_table; public uint opt_type_m_path_table; public DirectoryRecord root_directory_record; public byte root_directory_name; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public byte[] volume_set_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public byte[] publisher_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public byte[] preparer_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)] public byte[] application_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)] public byte[] copyright_file_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)] public byte[] abstract_file_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)] public byte[] bibliographic_file_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] creation_date; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] modification_date; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] expiration_date; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] effective_date; public byte file_structure_version; public byte reserved2; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 512)] public byte[] application_data; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 653)] public byte[] reserved3; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct BootRecord { public byte type; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)] public byte[] id; public byte version; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] system_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] boot_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1977)] public byte[] boot_use; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct PartitionDescriptor { public byte type; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)] public byte[] id; public byte version; public byte reserved1; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] system_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] partition_id; public uint partition_location; public uint partition_location_be; public uint partition_size; public uint partition_size_be; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1960)] public byte[] system_use; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct DirectoryRecord { public byte length; public byte xattr_len; public uint extent; public uint extent_be; public uint size; public uint size_be; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)] public byte[] date; public FileFlags flags; public byte file_unit_size; public byte interleave; public ushort volume_sequence_number; public ushort volume_sequence_number_be; public byte name_len; // Followed by name[name_len] and then system area until length arrives } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct ExtendedAttributeRecord { public ushort owner; public ushort owner_be; public ushort group; public ushort group_be; public Permissions permissions; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] creation_date; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] modification_date; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] expiration_date; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public byte[] effective_date; public RecordFormat record_format; public RecordAttribute record_attributes; public ushort record_length; public ushort record_length_be; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] system_id; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] system_use; public byte record_version; public byte escape_len; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] reserved1; public ushort app_use_len; public ushort app_use_len_be; } // There are two tables one in little endian one in big endian [StructLayout(LayoutKind.Sequential, Pack = 1)] struct PathTableEntry { public byte name_len; public byte xattr_len; public uint start_lbn; public ushort parent_dirno; // Followed by name[name_len] } static DecodedVolumeDescriptor DecodeVolumeDescriptor(PrimaryVolumeDescriptor pvd) { DecodedVolumeDescriptor decodedVD = new DecodedVolumeDescriptor(); decodedVD.SystemIdentifier = Encoding.ASCII.GetString(pvd.system_id).TrimEnd().Trim('\0'); decodedVD.VolumeIdentifier = Encoding.ASCII.GetString(pvd.volume_id).TrimEnd().Trim('\0'); decodedVD.VolumeSetIdentifier = Encoding.ASCII.GetString(pvd.volume_set_id).TrimEnd().Trim('\0'); decodedVD.PublisherIdentifier = Encoding.ASCII.GetString(pvd.publisher_id).TrimEnd().Trim('\0'); decodedVD.DataPreparerIdentifier = Encoding.ASCII.GetString(pvd.preparer_id).TrimEnd().Trim('\0'); decodedVD.ApplicationIdentifier = Encoding.ASCII.GetString(pvd.application_data).TrimEnd().Trim('\0'); if(pvd.creation_date[0] == '0' || pvd.creation_date[0] == 0x00) decodedVD.CreationTime = DateTime.MinValue; else decodedVD.CreationTime = DateHandlers.ISO9660ToDateTime(pvd.creation_date); if(pvd.modification_date[0] == '0' || pvd.modification_date[0] == 0x00) decodedVD.HasModificationTime = false; else { decodedVD.HasModificationTime = true; decodedVD.ModificationTime = DateHandlers.ISO9660ToDateTime(pvd.modification_date); } if(pvd.expiration_date[0] == '0' || pvd.expiration_date[0] == 0x00) decodedVD.HasExpirationTime = false; else { decodedVD.HasExpirationTime = true; decodedVD.ExpirationTime = DateHandlers.ISO9660ToDateTime(pvd.expiration_date); } if(pvd.effective_date[0] == '0' || pvd.effective_date[0] == 0x00) decodedVD.HasEffectiveTime = false; else { decodedVD.HasEffectiveTime = true; decodedVD.EffectiveTime = DateHandlers.ISO9660ToDateTime(pvd.effective_date); } decodedVD.Blocks = pvd.volume_space_size; decodedVD.BlockSize = pvd.logical_block_size; return decodedVD; } } }