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