/*************************************************************************** The Disc Image Chef ---------------------------------------------------------------------------- Filename : AppleMFS.cs Version : 1.0 Author(s) : Natalia Portillo Component : Filesystem plugins Revision : $Revision$ Last change by : $Author$ Date : $Date$ --[ Description ] ---------------------------------------------------------- Identifies the Macintosh FileSystem and shows information. --[ License ] -------------------------------------------------------------- This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . ---------------------------------------------------------------------------- Copyright (C) 2011-2014 Claunia.com ****************************************************************************/ //$Id$ using System; using System.Text; using DiscImageChef; // Information from Inside Macintosh namespace DiscImageChef.Plugins { class AppleMFS : Plugin { const UInt16 MFS_MAGIC = 0xD2D7; // "LK" const UInt16 MFSBB_MAGIC = 0x4C4B; public AppleMFS(PluginBase Core) { Name = "Apple Macintosh File System"; PluginUUID = new Guid("36405F8D-0D26-4066-6538-5DBF5D065C3A"); } public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, ulong partitionOffset) { UInt16 drSigWord; byte[] mdb_sector = imagePlugin.ReadSector(2 + partitionOffset); drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0x000); return drSigWord == MFS_MAGIC; } public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, ulong partitionOffset, out string information) { information = ""; StringBuilder sb = new StringBuilder(); MFS_MasterDirectoryBlock MDB = new MFS_MasterDirectoryBlock(); MFS_BootBlock BB = new MFS_BootBlock(); byte[] pString = new byte[16]; byte[] variable_size; byte[] mdb_sector = imagePlugin.ReadSector(2 + partitionOffset); byte[] bb_sector = imagePlugin.ReadSector(0 + partitionOffset); MDB.drSigWord = BigEndianBitConverter.ToUInt16(mdb_sector, 0x000); if (MDB.drSigWord != MFS_MAGIC) return; MDB.drCrDate = BigEndianBitConverter.ToUInt32(mdb_sector, 0x002); MDB.drLsBkUp = BigEndianBitConverter.ToUInt32(mdb_sector, 0x006); MDB.drAtrb = BigEndianBitConverter.ToUInt16(mdb_sector, 0x00A); MDB.drNmFls = BigEndianBitConverter.ToUInt16(mdb_sector, 0x00C); MDB.drDirSt = BigEndianBitConverter.ToUInt16(mdb_sector, 0x00E); MDB.drBlLen = BigEndianBitConverter.ToUInt16(mdb_sector, 0x010); MDB.drNmAlBlks = BigEndianBitConverter.ToUInt16(mdb_sector, 0x012); MDB.drAlBlkSiz = BigEndianBitConverter.ToUInt32(mdb_sector, 0x014); MDB.drClpSiz = BigEndianBitConverter.ToUInt32(mdb_sector, 0x018); MDB.drAlBlSt = BigEndianBitConverter.ToUInt16(mdb_sector, 0x01C); MDB.drNxtFNum = BigEndianBitConverter.ToUInt32(mdb_sector, 0x01E); MDB.drFreeBks = BigEndianBitConverter.ToUInt16(mdb_sector, 0x022); MDB.drVNSiz = mdb_sector[0x024]; variable_size = new byte[MDB.drVNSiz]; Array.Copy(mdb_sector, 0x025, variable_size, 0, MDB.drVNSiz); MDB.drVN = Encoding.ASCII.GetString(variable_size); BB.signature = BigEndianBitConverter.ToUInt16(bb_sector, 0x000); if (BB.signature == MFSBB_MAGIC) { BB.branch = BigEndianBitConverter.ToUInt32(bb_sector, 0x002); BB.boot_flags = bb_sector[0x006]; BB.boot_version = bb_sector[0x007]; BB.sec_sv_pages = BigEndianBitConverter.ToInt16(bb_sector, 0x008); Array.Copy(mdb_sector, 0x00A, pString, 0, 16); BB.system_name = StringHandlers.PascalToString(pString); Array.Copy(mdb_sector, 0x01A, pString, 0, 16); BB.finder_name = StringHandlers.PascalToString(pString); Array.Copy(mdb_sector, 0x02A, pString, 0, 16); BB.debug_name = StringHandlers.PascalToString(pString); Array.Copy(mdb_sector, 0x03A, pString, 0, 16); BB.disasm_name = StringHandlers.PascalToString(pString); Array.Copy(mdb_sector, 0x04A, pString, 0, 16); BB.stupscr_name = StringHandlers.PascalToString(pString); Array.Copy(mdb_sector, 0x05A, pString, 0, 16); BB.bootup_name = StringHandlers.PascalToString(pString); Array.Copy(mdb_sector, 0x06A, pString, 0, 16); BB.clipbrd_name = StringHandlers.PascalToString(pString); BB.max_files = BigEndianBitConverter.ToUInt16(bb_sector, 0x07A); BB.queue_size = BigEndianBitConverter.ToUInt16(bb_sector, 0x07C); BB.heap_128k = BigEndianBitConverter.ToUInt32(bb_sector, 0x07E); BB.heap_256k = BigEndianBitConverter.ToUInt32(bb_sector, 0x082); BB.heap_512k = BigEndianBitConverter.ToUInt32(bb_sector, 0x086); } else BB.signature = 0x0000; sb.AppendLine("Apple Macintosh File System"); sb.AppendLine(); sb.AppendLine("Master Directory Block:"); sb.AppendFormat("Creation date: {0}", DateHandlers.MacToDateTime(MDB.drCrDate)).AppendLine(); sb.AppendFormat("Last backup date: {0}", DateHandlers.MacToDateTime(MDB.drLsBkUp)).AppendLine(); if ((MDB.drAtrb & 0x80) == 0x80) sb.AppendLine("Volume is locked by hardware."); if ((MDB.drAtrb & 0x8000) == 0x8000) sb.AppendLine("Volume is locked by software."); sb.AppendFormat("{0} files on volume", MDB.drNmFls).AppendLine(); sb.AppendFormat("First directory block: {0}", MDB.drDirSt).AppendLine(); sb.AppendFormat("{0} blocks in directory.", MDB.drBlLen).AppendLine(); sb.AppendFormat("{0} volume allocation blocks.", MDB.drNmAlBlks).AppendLine(); sb.AppendFormat("Size of allocation blocks: {0}", MDB.drAlBlkSiz).AppendLine(); sb.AppendFormat("{0} bytes to allocate.", MDB.drClpSiz).AppendLine(); sb.AppendFormat("{0} first allocation block.", MDB.drAlBlSt).AppendLine(); sb.AppendFormat("Next unused file number: {0}", MDB.drNxtFNum).AppendLine(); sb.AppendFormat("{0} unused allocation blocks.", MDB.drFreeBks).AppendLine(); sb.AppendFormat("Volume name: {0}", MDB.drVN).AppendLine(); if (BB.signature == MFSBB_MAGIC) { sb.AppendLine("Volume is bootable."); sb.AppendLine(); sb.AppendLine("Boot Block:"); if ((BB.boot_flags & 0x40) == 0x40) sb.AppendLine("Boot block should be executed."); if ((BB.boot_flags & 0x80) == 0x80) { sb.AppendLine("Boot block is in new unknown format."); } else { if (BB.sec_sv_pages > 0) sb.AppendLine("Allocate secondary sound buffer at boot."); else if (BB.sec_sv_pages < 0) sb.AppendLine("Allocate secondary sound and video buffers at boot."); sb.AppendFormat("System filename: {0}", BB.system_name).AppendLine(); sb.AppendFormat("Finder filename: {0}", BB.finder_name).AppendLine(); sb.AppendFormat("Debugger filename: {0}", BB.debug_name).AppendLine(); sb.AppendFormat("Disassembler filename: {0}", BB.disasm_name).AppendLine(); sb.AppendFormat("Startup screen filename: {0}", BB.stupscr_name).AppendLine(); sb.AppendFormat("First program to execute at boot: {0}", BB.bootup_name).AppendLine(); sb.AppendFormat("Clipboard filename: {0}", BB.clipbrd_name).AppendLine(); sb.AppendFormat("Maximum opened files: {0}", BB.max_files * 4).AppendLine(); sb.AppendFormat("Event queue size: {0}", BB.queue_size).AppendLine(); sb.AppendFormat("Heap size with 128KiB of RAM: {0} bytes", BB.heap_128k).AppendLine(); sb.AppendFormat("Heap size with 256KiB of RAM: {0} bytes", BB.heap_256k).AppendLine(); sb.AppendFormat("Heap size with 512KiB of RAM or more: {0} bytes", BB.heap_512k).AppendLine(); } } else sb.AppendLine("Volume is not bootable."); information = sb.ToString(); return; } struct MFS_MasterDirectoryBlock // Should be offset 0x0400 bytes in volume { // 0x000, Signature, 0xD2D7 public UInt16 drSigWord; // 0x002, Volume creation date public UInt32 drCrDate; // 0x006, Volume last backup date public UInt32 drLsBkUp; // 0x00A, Volume attributes public UInt16 drAtrb; // 0x00C, Volume number of files public UInt16 drNmFls; // 0x00E, First directory block public UInt16 drDirSt; // 0x010, Length of directory in blocks public UInt16 drBlLen; // 0x012, Volume allocation blocks public UInt16 drNmAlBlks; // 0x014, Size of allocation blocks public UInt32 drAlBlkSiz; // 0x018, Number of bytes to allocate public UInt32 drClpSiz; // 0x01C, First allocation block in block map public UInt16 drAlBlSt; // 0x01E. Next unused file number public UInt32 drNxtFNum; // 0x022, Number of unused allocation blocks public UInt16 drFreeBks; // 0x024, Length of volume name public byte drVNSiz; // 0x025, Characters of volume name public string drVN; } struct MFS_BootBlock // Should be offset 0x0000 bytes in volume { public UInt16 signature; // 0x000, Signature, 0x4C4B if bootable public UInt32 branch; // 0x002, Branch public byte boot_flags; // 0x006, Boot block flags public byte boot_version; // 0x007, Boot block version public short sec_sv_pages; // 0x008, Allocate secondary buffers public string system_name; // 0x00A, System file name (16 bytes) public string finder_name; // 0x01A, Finder file name (16 bytes) public string debug_name; // 0x02A, Debugger file name (16 bytes) public string disasm_name; // 0x03A, Disassembler file name (16 bytes) public string stupscr_name; // 0x04A, Startup screen file name (16 bytes) public string bootup_name; // 0x05A, First program to execute on boot (16 bytes) public string clipbrd_name; // 0x06A, Clipboard file name (16 bytes) public UInt16 max_files; // 0x07A, 1/4 of maximum opened at a time files public UInt16 queue_size; // 0x07C, Event queue size public UInt32 heap_128k; // 0x07E, Heap size on a Mac with 128KiB of RAM public UInt32 heap_256k; // 0x082, Heap size on a Mac with 256KiB of RAM public UInt32 heap_512k; // 0x086, Heap size on a Mac with 512KiB of RAM or more } // Follows boot code } }