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419 lines
20 KiB
C#
419 lines
20 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : HPFS.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : OS/2 High Performance File System plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the OS/2 High Performance File System and shows information.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Text;
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using DiscImageChef.Checksums;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.DiscImages;
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using Schemas;
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namespace DiscImageChef.Filesystems
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{
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// Information from an old unnamed document
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public class HPFS : Filesystem
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{
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public HPFS()
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{
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Name = "OS/2 High Performance File System";
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PluginUuid = new Guid("33513B2C-f590-4acb-8bf2-0b1d5e19dec5");
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CurrentEncoding = Encoding.GetEncoding("ibm850");
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}
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public HPFS(Encoding encoding)
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{
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Name = "OS/2 High Performance File System";
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PluginUuid = new Guid("33513B2C-f590-4acb-8bf2-0b1d5e19dec5");
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CurrentEncoding = encoding ?? Encoding.GetEncoding("ibm850");
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}
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public HPFS(ImagePlugin imagePlugin, Partition partition, Encoding encoding)
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{
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Name = "OS/2 High Performance File System";
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PluginUuid = new Guid("33513B2C-f590-4acb-8bf2-0b1d5e19dec5");
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CurrentEncoding = encoding ?? Encoding.GetEncoding("ibm850");
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}
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public override bool Identify(ImagePlugin imagePlugin, Partition partition)
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{
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if(16 + partition.Start >= partition.End) return false;
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uint magic1, magic2;
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byte[] hpfsSbSector =
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imagePlugin.ReadSector(16 + partition.Start); // Seek to superblock, on logical sector 16
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magic1 = BitConverter.ToUInt32(hpfsSbSector, 0x000);
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magic2 = BitConverter.ToUInt32(hpfsSbSector, 0x004);
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return magic1 == 0xF995E849 && magic2 == 0xFA53E9C5;
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}
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public override void GetInformation(ImagePlugin imagePlugin, Partition partition,
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out string information)
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{
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information = "";
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StringBuilder sb = new StringBuilder();
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byte[] hpfsBpbSector =
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imagePlugin.ReadSector(0 + partition.Start); // Seek to BIOS parameter block, on logical sector 0
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byte[] hpfsSbSector =
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imagePlugin.ReadSector(16 + partition.Start); // Seek to superblock, on logical sector 16
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byte[] hpfsSpSector =
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imagePlugin.ReadSector(17 + partition.Start); // Seek to spareblock, on logical sector 17
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IntPtr bpbPtr = Marshal.AllocHGlobal(512);
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Marshal.Copy(hpfsBpbSector, 0, bpbPtr, 512);
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HPFS_BIOSParameterBlock hpfsBpb = (HPFS_BIOSParameterBlock)Marshal.PtrToStructure(bpbPtr, typeof(HPFS_BIOSParameterBlock));
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Marshal.FreeHGlobal(bpbPtr);
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IntPtr sbPtr = Marshal.AllocHGlobal(512);
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Marshal.Copy(hpfsSbSector, 0, sbPtr, 512);
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HPFS_SuperBlock hpfsSb = (HPFS_SuperBlock)Marshal.PtrToStructure(sbPtr, typeof(HPFS_SuperBlock));
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Marshal.FreeHGlobal(sbPtr);
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IntPtr spPtr = Marshal.AllocHGlobal(512);
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Marshal.Copy(hpfsSpSector, 0, spPtr, 512);
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HPFS_SpareBlock hpfsSp = (HPFS_SpareBlock)Marshal.PtrToStructure(spPtr, typeof(HPFS_SpareBlock));
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Marshal.FreeHGlobal(spPtr);
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if(StringHandlers.CToString(hpfsBpb.fs_type) != "HPFS " || hpfsSb.magic1 != 0xF995E849 ||
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hpfsSb.magic2 != 0xFA53E9C5 || hpfsSp.magic1 != 0xF9911849 || hpfsSp.magic2 != 0xFA5229C5)
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{
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sb.AppendLine("This may not be HPFS, following information may be not correct.");
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sb.AppendFormat("File system type: \"{0}\" (Should be \"HPFS \")", hpfsBpb.fs_type).AppendLine();
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sb.AppendFormat("Superblock magic1: 0x{0:X8} (Should be 0xF995E849)", hpfsSb.magic1).AppendLine();
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sb.AppendFormat("Superblock magic2: 0x{0:X8} (Should be 0xFA53E9C5)", hpfsSb.magic2).AppendLine();
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sb.AppendFormat("Spareblock magic1: 0x{0:X8} (Should be 0xF9911849)", hpfsSp.magic1).AppendLine();
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sb.AppendFormat("Spareblock magic2: 0x{0:X8} (Should be 0xFA5229C5)", hpfsSp.magic2).AppendLine();
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}
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sb.AppendFormat("OEM name: {0}", StringHandlers.CToString(hpfsBpb.oem_name)).AppendLine();
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sb.AppendFormat("{0} bytes per sector", hpfsBpb.bps).AppendLine();
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// sb.AppendFormat("{0} sectors per cluster", hpfs_bpb.spc).AppendLine();
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// sb.AppendFormat("{0} reserved sectors", hpfs_bpb.rsectors).AppendLine();
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// sb.AppendFormat("{0} FATs", hpfs_bpb.fats_no).AppendLine();
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// sb.AppendFormat("{0} entries on root directory", hpfs_bpb.root_ent).AppendLine();
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// sb.AppendFormat("{0} mini sectors on volume", hpfs_bpb.sectors).AppendLine();
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sb.AppendFormat("Media descriptor: 0x{0:X2}", hpfsBpb.media).AppendLine();
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// sb.AppendFormat("{0} sectors per FAT", hpfs_bpb.spfat).AppendLine();
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// sb.AppendFormat("{0} sectors per track", hpfs_bpb.sptrk).AppendLine();
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// sb.AppendFormat("{0} heads", hpfs_bpb.heads).AppendLine();
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sb.AppendFormat("{0} sectors hidden before BPB", hpfsBpb.hsectors).AppendLine();
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sb.AppendFormat("{0} sectors on volume ({1} bytes)", hpfsSb.sectors, hpfsSb.sectors * hpfsBpb.bps)
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.AppendLine();
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// sb.AppendFormat("{0} sectors on volume ({1} bytes)", hpfs_bpb.big_sectors, hpfs_bpb.big_sectors * hpfs_bpb.bps).AppendLine();
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sb.AppendFormat("BIOS Drive Number: 0x{0:X2}", hpfsBpb.drive_no).AppendLine();
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sb.AppendFormat("NT Flags: 0x{0:X2}", hpfsBpb.nt_flags).AppendLine();
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sb.AppendFormat("Signature: 0x{0:X2}", hpfsBpb.signature).AppendLine();
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sb.AppendFormat("Serial number: 0x{0:X8}", hpfsBpb.serial_no).AppendLine();
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sb.AppendFormat("Volume label: {0}", StringHandlers.CToString(hpfsBpb.volume_label, CurrentEncoding))
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.AppendLine();
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// sb.AppendFormat("Filesystem type: \"{0}\"", hpfs_bpb.fs_type).AppendLine();
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DateTime lastChk = DateHandlers.UnixToDateTime(hpfsSb.last_chkdsk);
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DateTime lastOptim = DateHandlers.UnixToDateTime(hpfsSb.last_optim);
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sb.AppendFormat("HPFS version: {0}", hpfsSb.version).AppendLine();
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sb.AppendFormat("Functional version: {0}", hpfsSb.func_version).AppendLine();
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sb.AppendFormat("Sector of root directory FNode: {0}", hpfsSb.root_fnode).AppendLine();
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sb.AppendFormat("{0} sectors are marked bad", hpfsSb.badblocks).AppendLine();
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sb.AppendFormat("Sector of free space bitmaps: {0}", hpfsSb.bitmap_lsn).AppendLine();
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sb.AppendFormat("Sector of bad blocks list: {0}", hpfsSb.badblock_lsn).AppendLine();
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if(hpfsSb.last_chkdsk > 0) sb.AppendFormat("Date of last integrity check: {0}", lastChk).AppendLine();
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else sb.AppendLine("Filesystem integrity has never been checked");
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if(hpfsSb.last_optim > 0) sb.AppendFormat("Date of last optimization {0}", lastOptim).AppendLine();
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else sb.AppendLine("Filesystem has never been optimized");
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sb.AppendFormat("Directory band has {0} sectors", hpfsSb.dband_sectors).AppendLine();
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sb.AppendFormat("Directory band starts at sector {0}", hpfsSb.dband_start).AppendLine();
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sb.AppendFormat("Directory band ends at sector {0}", hpfsSb.dband_last).AppendLine();
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sb.AppendFormat("Sector of directory band bitmap: {0}", hpfsSb.dband_bitmap).AppendLine();
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sb.AppendFormat("Sector of ACL directory: {0}", hpfsSb.acl_start).AppendLine();
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sb.AppendFormat("Sector of Hotfix directory: {0}", hpfsSp.hotfix_start).AppendLine();
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sb.AppendFormat("{0} used Hotfix entries", hpfsSp.hotfix_used).AppendLine();
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sb.AppendFormat("{0} total Hotfix entries", hpfsSp.hotfix_entries).AppendLine();
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sb.AppendFormat("{0} free spare DNodes", hpfsSp.spare_dnodes_free).AppendLine();
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sb.AppendFormat("{0} total spare DNodes", hpfsSp.spare_dnodes).AppendLine();
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sb.AppendFormat("Sector of codepage directory: {0}", hpfsSp.codepage_lsn).AppendLine();
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sb.AppendFormat("{0} codepages used in the volume", hpfsSp.codepages).AppendLine();
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sb.AppendFormat("SuperBlock CRC32: {0:X8}", hpfsSp.sb_crc32).AppendLine();
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sb.AppendFormat("SpareBlock CRC32: {0:X8}", hpfsSp.sp_crc32).AppendLine();
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sb.AppendLine("Flags:");
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sb.AppendLine((hpfsSp.flags1 & 0x01) == 0x01 ? "Filesystem is dirty." : "Filesystem is clean.");
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if((hpfsSp.flags1 & 0x02) == 0x02) sb.AppendLine("Spare directory blocks are in use");
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if((hpfsSp.flags1 & 0x04) == 0x04) sb.AppendLine("Hotfixes are in use");
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if((hpfsSp.flags1 & 0x08) == 0x08) sb.AppendLine("Disk contains bad sectors");
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if((hpfsSp.flags1 & 0x10) == 0x10) sb.AppendLine("Disk has a bad bitmap");
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if((hpfsSp.flags1 & 0x20) == 0x20) sb.AppendLine("Filesystem was formatted fast");
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if((hpfsSp.flags1 & 0x40) == 0x40) sb.AppendLine("Unknown flag 0x40 on flags1 is active");
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if((hpfsSp.flags1 & 0x80) == 0x80) sb.AppendLine("Filesystem has been mounted by an old IFS");
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if((hpfsSp.flags2 & 0x01) == 0x01) sb.AppendLine("Install DASD limits");
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if((hpfsSp.flags2 & 0x02) == 0x02) sb.AppendLine("Resync DASD limits");
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if((hpfsSp.flags2 & 0x04) == 0x04) sb.AppendLine("DASD limits are operational");
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if((hpfsSp.flags2 & 0x08) == 0x08) sb.AppendLine("Multimedia is active");
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if((hpfsSp.flags2 & 0x10) == 0x10) sb.AppendLine("DCE ACLs are active");
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if((hpfsSp.flags2 & 0x20) == 0x20) sb.AppendLine("DASD limits are dirty");
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if((hpfsSp.flags2 & 0x40) == 0x40) sb.AppendLine("Unknown flag 0x40 on flags2 is active");
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if((hpfsSp.flags2 & 0x80) == 0x80) sb.AppendLine("Unknown flag 0x80 on flags2 is active");
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XmlFsType = new FileSystemType();
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// Theoretically everything from BPB to SB is boot code, should I hash everything or only the sector loaded by BIOS itself?
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if(hpfsBpb.jump[0] == 0xEB && hpfsBpb.jump[1] > 0x3C && hpfsBpb.jump[1] < 0x80 &&
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hpfsBpb.signature2 == 0xAA55)
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{
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XmlFsType.Bootable = true;
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Sha1Context sha1Ctx = new Sha1Context();
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sha1Ctx.Init();
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string bootChk = sha1Ctx.Data(hpfsBpb.boot_code, out byte[] sha1_out);
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sb.AppendLine("Volume is bootable");
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sb.AppendFormat("Boot code's SHA1: {0}", bootChk).AppendLine();
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}
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XmlFsType.Dirty |= (hpfsSp.flags1 & 0x01) == 0x01;
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XmlFsType.Clusters = hpfsSb.sectors;
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XmlFsType.ClusterSize = hpfsBpb.bps;
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XmlFsType.Type = "HPFS";
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XmlFsType.VolumeName = StringHandlers.CToString(hpfsBpb.volume_label, CurrentEncoding);
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XmlFsType.VolumeSerial = $"{hpfsBpb.serial_no:X8}";
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XmlFsType.SystemIdentifier = StringHandlers.CToString(hpfsBpb.oem_name);
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information = sb.ToString();
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}
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/// <summary>
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/// BIOS Parameter Block, at sector 0
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct HPFS_BIOSParameterBlock
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{
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/// <summary>0x000, Jump to boot code</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)] public byte[] jump;
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/// <summary>0x003, OEM Name, 8 bytes, space-padded</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] oem_name;
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/// <summary>0x00B, Bytes per sector</summary>
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public ushort bps;
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/// <summary>0x00D, Sectors per cluster</summary>
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public byte spc;
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/// <summary>0x00E, Reserved sectors between BPB and... does it have sense in HPFS?</summary>
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public ushort rsectors;
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/// <summary>0x010, Number of FATs... seriously?</summary>
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public byte fats_no;
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/// <summary>0x011, Number of entries on root directory... ok</summary>
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public ushort root_ent;
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/// <summary>0x013, Sectors in volume... doubt it</summary>
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public ushort sectors;
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/// <summary>0x015, Media descriptor</summary>
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public byte media;
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/// <summary>0x016, Sectors per FAT... again</summary>
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public ushort spfat;
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/// <summary>0x018, Sectors per track... you're kidding</summary>
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public ushort sptrk;
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/// <summary>0x01A, Heads... stop!</summary>
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public ushort heads;
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/// <summary>0x01C, Hidden sectors before BPB</summary>
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public uint hsectors;
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/// <summary>0x024, Sectors in volume if > 65535...</summary>
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public uint big_sectors;
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/// <summary>0x028, Drive number</summary>
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public byte drive_no;
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/// <summary>0x029, Volume flags?</summary>
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public byte nt_flags;
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/// <summary>0x02A, EPB signature, 0x29</summary>
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public byte signature;
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/// <summary>0x02B, Volume serial number</summary>
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public uint serial_no;
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/// <summary>0x02F, Volume label, 11 bytes, space-padded</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 11)] public byte[] volume_label;
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/// <summary>0x03A, Filesystem type, 8 bytes, space-padded ("HPFS ")</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] fs_type;
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/// <summary>Boot code.</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 448)] public byte[] boot_code;
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/// <summary>0x1FE, 0xAA55</summary>
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public ushort signature2;
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}
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/// <summary>
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/// HPFS superblock at sector 16
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct HPFS_SuperBlock
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{
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/// <summary>0x000, 0xF995E849</summary>
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public uint magic1;
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/// <summary>0x004, 0xFA53E9C5</summary>
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public uint magic2;
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/// <summary>0x008, HPFS version</summary>
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public byte version;
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/// <summary>0x009, 2 if <= 4 GiB, 3 if > 4 GiB</summary>
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public byte func_version;
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/// <summary>0x00A, Alignment</summary>
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public ushort dummy;
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/// <summary>0x00C, LSN pointer to root fnode</summary>
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public uint root_fnode;
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/// <summary>0x010, Sectors on volume</summary>
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public uint sectors;
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/// <summary>0x014, Bad blocks on volume</summary>
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public uint badblocks;
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/// <summary>0x018, LSN pointer to volume bitmap</summary>
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public uint bitmap_lsn;
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/// <summary>0x01C, 0</summary>
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public uint zero1;
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/// <summary>0x020, LSN pointer to badblock directory</summary>
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public uint badblock_lsn;
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/// <summary>0x024, 0</summary>
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public uint zero2;
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/// <summary>0x028, Time of last CHKDSK</summary>
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public int last_chkdsk;
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/// <summary>0x02C, Time of last optimization</summary>
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public int last_optim;
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/// <summary>0x030, Sectors of dir band</summary>
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public uint dband_sectors;
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/// <summary>0x034, Start sector of dir band</summary>
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public uint dband_start;
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/// <summary>0x038, Last sector of dir band</summary>
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public uint dband_last;
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/// <summary>0x03C, LSN of free space bitmap</summary>
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public uint dband_bitmap;
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/// <summary>0x040, Can be used for volume name (32 bytes)</summary>
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public ulong zero3;
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/// <summary>0x048, ...</summary>
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public ulong zero4;
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/// <summary>0x04C, ...</summary>
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public ulong zero5;
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/// <summary>0x050, ...;</summary>
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public ulong zero6;
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/// <summary>0x058, LSN pointer to ACLs (only HPFS386)</summary>
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public uint acl_start;
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}
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/// <summary>
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/// HPFS spareblock at sector 17
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct HPFS_SpareBlock
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{
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/// <summary>0x000, 0xF9911849</summary>
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public uint magic1;
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/// <summary>0x004, 0xFA5229C5</summary>
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public uint magic2;
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/// <summary>0x008, HPFS flags</summary>
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public byte flags1;
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/// <summary>0x009, HPFS386 flags</summary>
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public byte flags2;
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/// <summary>0x00A, Alignment</summary>
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public ushort dummy;
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/// <summary>0x00C, LSN of hotfix directory</summary>
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public uint hotfix_start;
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/// <summary>0x010, Used hotfixes</summary>
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public uint hotfix_used;
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/// <summary>0x014, Total hotfixes available</summary>
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public uint hotfix_entries;
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/// <summary>0x018, Unused spare dnodes</summary>
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public uint spare_dnodes_free;
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/// <summary>0x01C, Length of spare dnodes list</summary>
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public uint spare_dnodes;
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/// <summary>0x020, LSN of codepage directory</summary>
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public uint codepage_lsn;
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/// <summary>0x024, Number of codepages used</summary>
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public uint codepages;
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/// <summary>0x028, SuperBlock CRC32 (only HPFS386)</summary>
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public uint sb_crc32;
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/// <summary>0x02C, SpareBlock CRC32 (only HPFS386)</summary>
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public uint sp_crc32;
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}
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public override Errno Mount()
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{
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return Errno.NotImplemented;
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}
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public override Errno Mount(bool debug)
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{
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return Errno.NotImplemented;
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}
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public override Errno Unmount()
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{
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return Errno.NotImplemented;
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}
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public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetAttributes(string path, ref FileAttributes attributes)
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{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno ListXAttr(string path, ref List<string> xattrs)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno GetXattr(string path, string xattr, ref byte[] buf)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno Read(string path, long offset, long size, ref byte[] buf)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno ReadDir(string path, ref List<string> contents)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno StatFs(ref FileSystemInfo stat)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno Stat(string path, ref FileEntryInfo stat)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno ReadLink(string path, ref string dest)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
}
|
|
} |