mirror of
https://github.com/aaru-dps/Aaru.git
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1125 lines
50 KiB
C#
1125 lines
50 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Microsoft FAT filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Microsoft FAT filesystem 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 © 2011-2022 Natalia Portillo
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// ****************************************************************************/
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namespace Aaru.Filesystems;
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Text;
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using Aaru.Checksums;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Console;
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using Aaru.Helpers;
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using Schemas;
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using Marshal = Aaru.Helpers.Marshal;
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public sealed partial class FAT
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{
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/// <inheritdoc />
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[SuppressMessage("ReSharper", "JoinDeclarationAndInitializer")]
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public bool Identify(IMediaImage imagePlugin, Partition partition)
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{
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if(2 + partition.Start >= partition.End)
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return false;
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ushort bps;
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byte spc;
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byte numberOfFats;
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ushort reservedSecs;
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ushort rootEntries;
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ushort sectors;
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byte mediaDescriptor;
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ushort fatSectors;
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uint bigSectors;
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byte bpbSignature;
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byte fat32Signature;
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ulong hugeSectors;
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var fat32Id = new byte[8];
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var msxId = new byte[6];
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byte fatId;
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var dosOem = new byte[8];
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var atariOem = new byte[6];
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ushort bootable = 0;
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uint sectorsPerBpb = imagePlugin.Info.SectorSize < 512 ? 512 / imagePlugin.Info.SectorSize : 1;
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ErrorNumber errno = imagePlugin.ReadSectors(0 + partition.Start, sectorsPerBpb, out byte[] bpbSector);
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if(errno != ErrorNumber.NoError)
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return false;
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errno = imagePlugin.ReadSector(sectorsPerBpb + partition.Start, out byte[] fatSector);
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if(errno != ErrorNumber.NoError)
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return false;
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HumanParameterBlock humanBpb = Marshal.ByteArrayToStructureBigEndian<HumanParameterBlock>(bpbSector);
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ulong expectedClusters = humanBpb.bpc > 0 ? partition.Size / humanBpb.bpc : 0;
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AaruConsole.DebugWriteLine("FAT plugin", "Human bpc = {0}", humanBpb.bpc);
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AaruConsole.DebugWriteLine("FAT plugin", "Human clusters = {0}", humanBpb.clusters);
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AaruConsole.DebugWriteLine("FAT plugin", "Human big_clusters = {0}", humanBpb.big_clusters);
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AaruConsole.DebugWriteLine("FAT plugin", "Human expected clusters = {0}", expectedClusters);
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// Check clusters for Human68k are correct
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bool humanClustersCorrect = humanBpb.clusters == 0 ? humanBpb.big_clusters == expectedClusters
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: humanBpb.clusters == expectedClusters;
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// Check OEM for Human68k is correct
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bool humanOemCorrect = bpbSector[2] >= 0x20 && bpbSector[3] >= 0x20 && bpbSector[4] >= 0x20 &&
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bpbSector[5] >= 0x20 && bpbSector[6] >= 0x20 && bpbSector[7] >= 0x20 &&
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bpbSector[8] >= 0x20 && bpbSector[9] >= 0x20 && bpbSector[10] >= 0x20 &&
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bpbSector[11] >= 0x20 && bpbSector[12] >= 0x20 && bpbSector[13] >= 0x20 &&
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bpbSector[14] >= 0x20 && bpbSector[15] >= 0x20 && bpbSector[16] >= 0x20 &&
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bpbSector[17] >= 0x20;
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// Check correct branch for Human68k
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bool humanBranchCorrect = bpbSector[0] == 0x60 && bpbSector[1] >= 0x20 && bpbSector[1] < 0xFE;
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AaruConsole.DebugWriteLine("FAT plugin", "humanClustersCorrect = {0}", humanClustersCorrect);
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AaruConsole.DebugWriteLine("FAT plugin", "humanOemCorrect = {0}", humanOemCorrect);
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AaruConsole.DebugWriteLine("FAT plugin", "humanBranchCorrect = {0}", humanBranchCorrect);
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// If all Human68k checks are correct, it is a Human68k FAT16
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if(humanClustersCorrect &&
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humanOemCorrect &&
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humanBranchCorrect &&
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expectedClusters > 0)
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return true;
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Array.Copy(bpbSector, 0x02, atariOem, 0, 6);
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Array.Copy(bpbSector, 0x03, dosOem, 0, 8);
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bps = BitConverter.ToUInt16(bpbSector, 0x00B);
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spc = bpbSector[0x00D];
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reservedSecs = BitConverter.ToUInt16(bpbSector, 0x00E);
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numberOfFats = bpbSector[0x010];
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rootEntries = BitConverter.ToUInt16(bpbSector, 0x011);
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sectors = BitConverter.ToUInt16(bpbSector, 0x013);
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mediaDescriptor = bpbSector[0x015];
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fatSectors = BitConverter.ToUInt16(bpbSector, 0x016);
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Array.Copy(bpbSector, 0x052, msxId, 0, 6);
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bigSectors = BitConverter.ToUInt32(bpbSector, 0x020);
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bpbSignature = bpbSector[0x026];
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fat32Signature = bpbSector[0x042];
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Array.Copy(bpbSector, 0x052, fat32Id, 0, 8);
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hugeSectors = BitConverter.ToUInt64(bpbSector, 0x052);
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fatId = fatSector[0];
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int bitsInBps = CountBits.Count(bps);
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if(imagePlugin.Info.SectorSize >= 512)
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bootable = BitConverter.ToUInt16(bpbSector, 0x1FE);
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bool correctSpc = spc is 1 or 2 or 4 or 8 or 16 or 32 or 64;
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string msxString = Encoding.ASCII.GetString(msxId);
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string fat32String = Encoding.ASCII.GetString(fat32Id);
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bool atariOemCorrect = atariOem[0] >= 0x20 && atariOem[1] >= 0x20 && atariOem[2] >= 0x20 &&
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atariOem[3] >= 0x20 && atariOem[4] >= 0x20 && atariOem[5] >= 0x20;
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bool dosOemCorrect = dosOem[0] >= 0x20 && dosOem[1] >= 0x20 && dosOem[2] >= 0x20 && dosOem[3] >= 0x20 &&
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dosOem[4] >= 0x20 && dosOem[5] >= 0x20 && dosOem[6] >= 0x20 && dosOem[7] >= 0x20;
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string oemString = Encoding.ASCII.GetString(dosOem);
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AaruConsole.DebugWriteLine("FAT plugin", "atari_oem_correct = {0}", atariOemCorrect);
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AaruConsole.DebugWriteLine("FAT plugin", "dos_oem_correct = {0}", dosOemCorrect);
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AaruConsole.DebugWriteLine("FAT plugin", "bps = {0}", bps);
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AaruConsole.DebugWriteLine("FAT plugin", "bits in bps = {0}", bitsInBps);
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AaruConsole.DebugWriteLine("FAT plugin", "spc = {0}", spc);
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AaruConsole.DebugWriteLine("FAT plugin", "correct_spc = {0}", correctSpc);
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AaruConsole.DebugWriteLine("FAT plugin", "reserved_secs = {0}", reservedSecs);
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AaruConsole.DebugWriteLine("FAT plugin", "fats_no = {0}", numberOfFats);
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AaruConsole.DebugWriteLine("FAT plugin", "root_entries = {0}", rootEntries);
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AaruConsole.DebugWriteLine("FAT plugin", "sectors = {0}", sectors);
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AaruConsole.DebugWriteLine("FAT plugin", "media_descriptor = 0x{0:X2}", mediaDescriptor);
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AaruConsole.DebugWriteLine("FAT plugin", "fat_sectors = {0}", fatSectors);
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AaruConsole.DebugWriteLine("FAT plugin", "msx_id = \"{0}\"", msxString);
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AaruConsole.DebugWriteLine("FAT plugin", "big_sectors = {0}", bigSectors);
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AaruConsole.DebugWriteLine("FAT plugin", "bpb_signature = 0x{0:X2}", bpbSignature);
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AaruConsole.DebugWriteLine("FAT plugin", "fat32_signature = 0x{0:X2}", fat32Signature);
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AaruConsole.DebugWriteLine("FAT plugin", "fat32_id = \"{0}\"", fat32String);
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AaruConsole.DebugWriteLine("FAT plugin", "huge_sectors = {0}", hugeSectors);
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AaruConsole.DebugWriteLine("FAT plugin", "fat_id = 0x{0:X2}", fatId);
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var apricotBps = BitConverter.ToUInt16(bpbSector, 0x50);
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byte apricotSpc = bpbSector[0x52];
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var apricotReservedSecs = BitConverter.ToUInt16(bpbSector, 0x53);
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byte apricotFatsNo = bpbSector[0x55];
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var apricotRootEntries = BitConverter.ToUInt16(bpbSector, 0x56);
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var apricotSectors = BitConverter.ToUInt16(bpbSector, 0x58);
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byte apricotMediaDescriptor = bpbSector[0x5A];
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var apricotFatSectors = BitConverter.ToUInt16(bpbSector, 0x5B);
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bool apricotCorrectSpc = apricotSpc is 1 or 2 or 4 or 8 or 16 or 32 or 64;
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int bitsInApricotBps = CountBits.Count(apricotBps);
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byte apricotPartitions = bpbSector[0x0C];
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_bps = {0}", apricotBps);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_spc = {0}", apricotSpc);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_correct_spc = {0}", apricotCorrectSpc);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_reserved_secs = {0}", apricotReservedSecs);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_fats_no = {0}", apricotFatsNo);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_root_entries = {0}", apricotRootEntries);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_sectors = {0}", apricotSectors);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_media_descriptor = 0x{0:X2}", apricotMediaDescriptor);
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AaruConsole.DebugWriteLine("FAT plugin", "apricot_fat_sectors = {0}", apricotFatSectors);
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// This is to support FAT partitions on hybrid ISO/USB images
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if(imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
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{
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sectors /= 4;
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bigSectors /= 4;
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hugeSectors /= 4;
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}
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switch(oemString)
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{
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// exFAT
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case "EXFAT ": return false;
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// NTFS
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case "NTFS " when bootable == 0xAA55 && numberOfFats == 0 && fatSectors == 0: return false;
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// QNX4
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case "FQNX4FS ": return false;
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}
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// HPFS
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if(16 + partition.Start <= partition.End)
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{
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errno = imagePlugin.ReadSector(16 + partition.Start,
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out byte[] hpfsSbSector); // Seek to superblock, on logical sector 16
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if(errno != ErrorNumber.NoError)
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return false;
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var hpfsMagic1 = BitConverter.ToUInt32(hpfsSbSector, 0x000);
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var hpfsMagic2 = BitConverter.ToUInt32(hpfsSbSector, 0x004);
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if(hpfsMagic1 == 0xF995E849 &&
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hpfsMagic2 == 0xFA53E9C5)
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return false;
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}
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switch(bitsInBps)
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{
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// FAT32 for sure
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case 1 when correctSpc && numberOfFats <= 2 && fatSectors == 0 && fat32Signature == 0x29 &&
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fat32String == "FAT32 ": return true;
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// short FAT32
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case 1 when correctSpc && numberOfFats <= 2 && fatSectors == 0 && fat32Signature == 0x28:
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return sectors == 0 ? bigSectors == 0
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? hugeSectors <= partition.End - partition.Start + 1
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: bigSectors <= partition.End - partition.Start + 1
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: sectors <= partition.End - partition.Start + 1;
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// MSX-DOS FAT12
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case 1 when correctSpc && numberOfFats <= 2 && rootEntries > 0 &&
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sectors <= partition.End - partition.Start + 1 && fatSectors > 0 &&
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msxString == "VOL_ID": return true;
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// EBPB
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case 1 when correctSpc && numberOfFats <= 2 && rootEntries > 0 && fatSectors > 0 &&
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bpbSignature is 0x28 or 0x29:
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return sectors == 0 ? bigSectors <= partition.End - partition.Start + 1
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: sectors <= partition.End - partition.Start + 1;
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// BPB
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case 1 when correctSpc && reservedSecs < partition.End - partition.Start && numberOfFats <= 2 &&
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rootEntries > 0 && fatSectors > 0:
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return sectors == 0 ? bigSectors <= partition.End - partition.Start + 1
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: sectors <= partition.End - partition.Start + 1;
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}
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// Apricot BPB
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if(bitsInApricotBps == 1 &&
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apricotCorrectSpc &&
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apricotReservedSecs < partition.End - partition.Start &&
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apricotFatsNo <= 2 &&
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apricotRootEntries > 0 &&
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apricotFatSectors > 0 &&
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apricotSectors <= partition.End - partition.Start + 1 &&
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apricotPartitions == 0)
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return true;
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// All FAT12 without BPB can only be used on floppies, without partitions.
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if(partition.Start != 0)
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return false;
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// DEC Rainbow, lacks a BPB but has a very concrete structure...
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if(imagePlugin.Info.Sectors == 800 &&
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imagePlugin.Info.SectorSize == 512)
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{
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// DEC Rainbow boots up with a Z80, first byte should be DI (disable interrupts)
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byte z80Di = bpbSector[0];
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// First FAT1 sector resides at LBA 0x14
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errno = imagePlugin.ReadSector(0x14, out byte[] fat1Sector0);
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if(errno != ErrorNumber.NoError)
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return false;
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// First FAT2 sector resides at LBA 0x1A
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errno = imagePlugin.ReadSector(0x1A, out byte[] fat2Sector0);
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if(errno != ErrorNumber.NoError)
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return false;
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bool equalFatIds = fat1Sector0[0] == fat2Sector0[0] && fat1Sector0[1] == fat2Sector0[1];
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// Volume is software interleaved 2:1
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var rootMs = new MemoryStream();
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foreach(ulong rootSector in new ulong[]
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{
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0x17, 0x19, 0x1B, 0x1D, 0x1E, 0x20
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})
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{
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errno = imagePlugin.ReadSector(rootSector, out byte[] tmp);
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if(errno != ErrorNumber.NoError)
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return false;
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rootMs.Write(tmp, 0, tmp.Length);
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}
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byte[] rootDir = rootMs.ToArray();
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var validRootDir = true;
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// Iterate all root directory
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for(var e = 0; e < 96 * 32; e += 32)
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{
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for(var c = 0; c < 11; c++)
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if(rootDir[c + e] < 0x20 && rootDir[c + e] != 0x00 && rootDir[c + e] != 0x05 ||
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rootDir[c + e] == 0xFF ||
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rootDir[c + e] == 0x2E)
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{
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validRootDir = false;
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break;
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}
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if(!validRootDir)
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break;
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}
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if(z80Di == 0xF3 &&
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equalFatIds &&
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(fat1Sector0[0] & 0xF0) == 0xF0 &&
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fat1Sector0[1] == 0xFF &&
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validRootDir)
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return true;
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}
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byte fat2 = fatSector[1];
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byte fat3 = fatSector[2];
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var fatCluster2 = (ushort)(((fat2 << 8) + fat3) & 0xFFF);
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AaruConsole.DebugWriteLine("FAT plugin", "1st fat cluster 1 = {0:X3}", fatCluster2);
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if(fatCluster2 < 0xFF0)
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return false;
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ulong fat2SectorNo = 0;
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switch(fatId)
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{
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case 0xE5:
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if(imagePlugin.Info.Sectors == 2002 &&
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imagePlugin.Info.SectorSize == 128)
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fat2SectorNo = 2;
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break;
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case 0xFD:
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switch(imagePlugin.Info.Sectors)
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{
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case 4004 when imagePlugin.Info.SectorSize == 128:
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case 2002 when imagePlugin.Info.SectorSize == 128:
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fat2SectorNo = 7;
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break;
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}
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break;
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case 0xFE:
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fat2SectorNo = imagePlugin.Info.Sectors switch
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{
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320 when imagePlugin.Info.SectorSize == 512 => 2,
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2002 when imagePlugin.Info.SectorSize == 128 => 7,
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1232 when imagePlugin.Info.SectorSize == 1024 => 3,
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616 when imagePlugin.Info.SectorSize == 1024 => 2,
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720 when imagePlugin.Info.SectorSize == 128 => 5,
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640 when imagePlugin.Info.SectorSize == 512 => 2,
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_ => fat2SectorNo
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};
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break;
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case 0xFF:
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if(imagePlugin.Info.Sectors == 640 &&
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imagePlugin.Info.SectorSize == 512)
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fat2SectorNo = 2;
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break;
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default:
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if(fatId < 0xE8)
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return false;
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fat2SectorNo = 2;
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break;
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}
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if(fat2SectorNo > partition.End ||
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fat2SectorNo == 0)
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return false;
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AaruConsole.DebugWriteLine("FAT plugin", "2nd fat starts at = {0}", fat2SectorNo);
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errno = imagePlugin.ReadSector(fat2SectorNo, out byte[] fat2Sector);
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if(errno != ErrorNumber.NoError)
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return false;
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fat2 = fat2Sector[1];
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fat3 = fat2Sector[2];
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fatCluster2 = (ushort)(((fat2 << 8) + fat3) & 0xFFF);
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if(fatCluster2 < 0xFF0)
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return false;
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return fatId == fat2Sector[0];
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}
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/// <inheritdoc />
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public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information, Encoding encoding)
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{
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Encoding = encoding ?? Encoding.GetEncoding("IBM437");
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information = "";
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var sb = new StringBuilder();
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XmlFsType = new FileSystemType();
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uint sectorsPerBpb = imagePlugin.Info.SectorSize < 512 ? 512 / imagePlugin.Info.SectorSize : 1;
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ErrorNumber errno = imagePlugin.ReadSectors(0 + partition.Start, sectorsPerBpb, out byte[] bpbSector);
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if(errno != ErrorNumber.NoError)
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return;
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|
|
BpbKind bpbKind = DetectBpbKind(bpbSector, imagePlugin, partition, out BiosParameterBlockEbpb fakeBpb,
|
|
out HumanParameterBlock humanBpb, out AtariParameterBlock atariBpb,
|
|
out byte minBootNearJump, out bool andosOemCorrect, out bool bootable);
|
|
|
|
var isFat12 = false;
|
|
var isFat16 = false;
|
|
var isFat32 = false;
|
|
ulong rootDirectorySector = 0;
|
|
string extraInfo = null;
|
|
string bootChk = null;
|
|
XmlFsType.Bootable = bootable;
|
|
|
|
// This is needed because for FAT16, GEMDOS increases bytes per sector count instead of using big_sectors field.
|
|
uint sectorsPerRealSector;
|
|
|
|
// This is needed because some OSes don't put volume label as first entry in the root directory
|
|
uint sectorsForRootDirectory = 0;
|
|
|
|
switch(bpbKind)
|
|
{
|
|
case BpbKind.DecRainbow:
|
|
case BpbKind.Hardcoded:
|
|
case BpbKind.Msx:
|
|
case BpbKind.Apricot:
|
|
isFat12 = true;
|
|
|
|
break;
|
|
case BpbKind.ShortFat32:
|
|
case BpbKind.LongFat32:
|
|
{
|
|
isFat32 = true;
|
|
|
|
Fat32ParameterBlock fat32Bpb = Marshal.ByteArrayToStructureLittleEndian<Fat32ParameterBlock>(bpbSector);
|
|
|
|
Fat32ParameterBlockShort shortFat32Bpb =
|
|
Marshal.ByteArrayToStructureLittleEndian<Fat32ParameterBlockShort>(bpbSector);
|
|
|
|
// This is to support FAT partitions on hybrid ISO/USB images
|
|
if(imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
|
|
{
|
|
fat32Bpb.bps *= 4;
|
|
fat32Bpb.spc /= 4;
|
|
fat32Bpb.big_spfat /= 4;
|
|
fat32Bpb.hsectors /= 4;
|
|
fat32Bpb.sptrk /= 4;
|
|
}
|
|
|
|
if(fat32Bpb.version != 0)
|
|
{
|
|
sb.AppendLine("FAT+");
|
|
XmlFsType.Type = "FAT+";
|
|
}
|
|
else
|
|
{
|
|
sb.AppendLine("Microsoft FAT32");
|
|
XmlFsType.Type = "FAT32";
|
|
}
|
|
|
|
if(fat32Bpb.oem_name != null)
|
|
if(fat32Bpb.oem_name[5] == 0x49 &&
|
|
fat32Bpb.oem_name[6] == 0x48 &&
|
|
fat32Bpb.oem_name[7] == 0x43)
|
|
sb.AppendLine("Volume has been modified by Windows 9x/Me Volume Tracker.");
|
|
else
|
|
XmlFsType.SystemIdentifier = StringHandlers.CToString(fat32Bpb.oem_name);
|
|
|
|
if(!string.IsNullOrEmpty(XmlFsType.SystemIdentifier))
|
|
sb.AppendFormat("OEM Name: {0}", XmlFsType.SystemIdentifier.Trim()).AppendLine();
|
|
|
|
sb.AppendFormat("{0} bytes per sector.", fat32Bpb.bps).AppendLine();
|
|
sb.AppendFormat("{0} sectors per cluster.", fat32Bpb.spc).AppendLine();
|
|
XmlFsType.ClusterSize = (uint)(fat32Bpb.bps * fat32Bpb.spc);
|
|
sb.AppendFormat("{0} sectors reserved between BPB and FAT.", fat32Bpb.rsectors).AppendLine();
|
|
|
|
if(fat32Bpb.big_sectors == 0 &&
|
|
fat32Bpb.signature == 0x28)
|
|
{
|
|
sb.AppendFormat("{0} sectors on volume ({1} bytes).", shortFat32Bpb.huge_sectors,
|
|
shortFat32Bpb.huge_sectors * shortFat32Bpb.bps).AppendLine();
|
|
|
|
XmlFsType.Clusters = shortFat32Bpb.huge_sectors / shortFat32Bpb.spc;
|
|
}
|
|
else if(fat32Bpb.sectors == 0)
|
|
{
|
|
sb.AppendFormat("{0} sectors on volume ({1} bytes).", fat32Bpb.big_sectors,
|
|
fat32Bpb.big_sectors * fat32Bpb.bps).AppendLine();
|
|
|
|
XmlFsType.Clusters = fat32Bpb.big_sectors / fat32Bpb.spc;
|
|
}
|
|
else
|
|
{
|
|
sb.AppendFormat("{0} sectors on volume ({1} bytes).", fat32Bpb.sectors,
|
|
fat32Bpb.sectors * fat32Bpb.bps).AppendLine();
|
|
|
|
XmlFsType.Clusters = (ulong)(fat32Bpb.sectors / fat32Bpb.spc);
|
|
}
|
|
|
|
sb.AppendFormat("{0} clusters on volume.", XmlFsType.Clusters).AppendLine();
|
|
sb.AppendFormat("Media descriptor: 0x{0:X2}", fat32Bpb.media).AppendLine();
|
|
sb.AppendFormat("{0} sectors per FAT.", fat32Bpb.big_spfat).AppendLine();
|
|
sb.AppendFormat("{0} sectors per track.", fat32Bpb.sptrk).AppendLine();
|
|
sb.AppendFormat("{0} heads.", fat32Bpb.heads).AppendLine();
|
|
sb.AppendFormat("{0} hidden sectors before BPB.", fat32Bpb.hsectors).AppendLine();
|
|
sb.AppendFormat("Cluster of root directory: {0}", fat32Bpb.root_cluster).AppendLine();
|
|
sb.AppendFormat("Sector of FSINFO structure: {0}", fat32Bpb.fsinfo_sector).AppendLine();
|
|
sb.AppendFormat("Sector of backup FAT32 parameter block: {0}", fat32Bpb.backup_sector).AppendLine();
|
|
sb.AppendFormat("Drive number: 0x{0:X2}", fat32Bpb.drive_no).AppendLine();
|
|
sb.AppendFormat("Volume Serial Number: 0x{0:X8}", fat32Bpb.serial_no).AppendLine();
|
|
XmlFsType.VolumeSerial = $"{fat32Bpb.serial_no:X8}";
|
|
|
|
if((fat32Bpb.flags & 0xF8) == 0x00)
|
|
{
|
|
if((fat32Bpb.flags & 0x01) == 0x01)
|
|
{
|
|
sb.AppendLine("Volume should be checked on next mount.");
|
|
XmlFsType.Dirty = true;
|
|
}
|
|
|
|
if((fat32Bpb.flags & 0x02) == 0x02)
|
|
sb.AppendLine("Disk surface should be on next mount.");
|
|
}
|
|
|
|
if((fat32Bpb.mirror_flags & 0x80) == 0x80)
|
|
sb.AppendFormat("FATs are out of sync. FAT #{0} is in use.", fat32Bpb.mirror_flags & 0xF).
|
|
AppendLine();
|
|
else
|
|
sb.AppendLine("All copies of FAT are the same.");
|
|
|
|
if((fat32Bpb.mirror_flags & 0x6F20) == 0x6F20)
|
|
sb.AppendLine("DR-DOS will boot this FAT32 using CHS.");
|
|
else if((fat32Bpb.mirror_flags & 0x4F20) == 0x4F20)
|
|
sb.AppendLine("DR-DOS will boot this FAT32 using LBA.");
|
|
|
|
if(fat32Bpb.signature == 0x29)
|
|
{
|
|
XmlFsType.VolumeName = StringHandlers.SpacePaddedToString(fat32Bpb.volume_label, Encoding);
|
|
XmlFsType.VolumeName = XmlFsType.VolumeName?.Replace("\0", "");
|
|
|
|
sb.AppendFormat("Filesystem type: {0}", Encoding.ASCII.GetString(fat32Bpb.fs_type)).AppendLine();
|
|
|
|
bootChk = Sha1Context.Data(fat32Bpb.boot_code, out _);
|
|
}
|
|
else
|
|
bootChk = Sha1Context.Data(shortFat32Bpb.boot_code, out _);
|
|
|
|
// Check that jumps to a correct boot code position and has boot signature set.
|
|
// This will mean that the volume will boot, even if just to say "this is not bootable change disk"......
|
|
XmlFsType.Bootable =
|
|
fat32Bpb.jump[0] == 0xEB && fat32Bpb.jump[1] >= minBootNearJump && fat32Bpb.jump[1] < 0x80 ||
|
|
fat32Bpb.jump[0] == 0xE9 && fat32Bpb.jump.Length >= 3 &&
|
|
BitConverter.ToUInt16(fat32Bpb.jump, 1) >= minBootNearJump &&
|
|
BitConverter.ToUInt16(fat32Bpb.jump, 1) <= 0x1FC;
|
|
|
|
sectorsPerRealSector = fat32Bpb.bps / imagePlugin.Info.SectorSize;
|
|
|
|
// First root directory sector
|
|
rootDirectorySector =
|
|
(ulong)((fat32Bpb.root_cluster - 2) * fat32Bpb.spc + fat32Bpb.big_spfat * fat32Bpb.fats_no +
|
|
fat32Bpb.rsectors) * sectorsPerRealSector;
|
|
|
|
sectorsForRootDirectory = 1;
|
|
|
|
if(fat32Bpb.fsinfo_sector + partition.Start <= partition.End)
|
|
{
|
|
errno = imagePlugin.ReadSector(fat32Bpb.fsinfo_sector + partition.Start, out byte[] fsinfoSector);
|
|
|
|
if(errno != ErrorNumber.NoError)
|
|
return;
|
|
|
|
FsInfoSector fsInfo = Marshal.ByteArrayToStructureLittleEndian<FsInfoSector>(fsinfoSector);
|
|
|
|
if(fsInfo.signature1 == FSINFO_SIGNATURE1 &&
|
|
fsInfo.signature2 == FSINFO_SIGNATURE2 &&
|
|
fsInfo.signature3 == FSINFO_SIGNATURE3)
|
|
{
|
|
if(fsInfo.free_clusters < 0xFFFFFFFF)
|
|
{
|
|
sb.AppendFormat("{0} free clusters", fsInfo.free_clusters).AppendLine();
|
|
XmlFsType.FreeClusters = fsInfo.free_clusters;
|
|
XmlFsType.FreeClustersSpecified = true;
|
|
}
|
|
|
|
if(fsInfo.last_cluster is > 2 and < 0xFFFFFFFF)
|
|
sb.AppendFormat("Last allocated cluster {0}", fsInfo.last_cluster).AppendLine();
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
// Some fields could overflow fake BPB, those will be handled below
|
|
case BpbKind.Atari:
|
|
{
|
|
ushort sum = 0;
|
|
|
|
for(var i = 0; i < bpbSector.Length; i += 2)
|
|
sum += BigEndianBitConverter.ToUInt16(bpbSector, i);
|
|
|
|
// TODO: Check this
|
|
if(sum == 0x1234)
|
|
{
|
|
XmlFsType.Bootable = true;
|
|
var atariSb = new StringBuilder();
|
|
|
|
atariSb.AppendFormat("cmdload will be loaded with value {0:X4}h",
|
|
BigEndianBitConverter.ToUInt16(bpbSector, 0x01E)).AppendLine();
|
|
|
|
atariSb.AppendFormat("Boot program will be loaded at address {0:X4}h", atariBpb.ldaaddr).
|
|
AppendLine();
|
|
|
|
atariSb.AppendFormat("FAT and directory will be cached at address {0:X4}h", atariBpb.fatbuf).
|
|
AppendLine();
|
|
|
|
if(atariBpb.ldmode == 0)
|
|
{
|
|
var tmp = new byte[8];
|
|
Array.Copy(atariBpb.fname, 0, tmp, 0, 8);
|
|
string fname = Encoding.ASCII.GetString(tmp).Trim();
|
|
tmp = new byte[3];
|
|
Array.Copy(atariBpb.fname, 8, tmp, 0, 3);
|
|
string extension = Encoding.ASCII.GetString(tmp).Trim();
|
|
string filename;
|
|
|
|
if(string.IsNullOrEmpty(extension))
|
|
filename = fname;
|
|
else
|
|
filename = fname + "." + extension;
|
|
|
|
atariSb.AppendFormat("Boot program resides in file \"{0}\"", filename).AppendLine();
|
|
}
|
|
else
|
|
atariSb.AppendFormat("Boot program starts in sector {0} and is {1} sectors long ({2} bytes)",
|
|
atariBpb.ssect, atariBpb.sectcnt, atariBpb.sectcnt * atariBpb.bps).
|
|
AppendLine();
|
|
|
|
extraInfo = atariSb.ToString();
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case BpbKind.Human:
|
|
XmlFsType.Bootable = true;
|
|
|
|
break;
|
|
}
|
|
|
|
if(!isFat32)
|
|
{
|
|
// This is to support FAT partitions on hybrid ISO/USB images
|
|
if(imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
|
|
{
|
|
fakeBpb.bps *= 4;
|
|
fakeBpb.spc /= 4;
|
|
fakeBpb.spfat /= 4;
|
|
fakeBpb.hsectors /= 4;
|
|
fakeBpb.sptrk /= 4;
|
|
fakeBpb.rsectors /= 4;
|
|
|
|
if(fakeBpb.spc == 0)
|
|
fakeBpb.spc = 1;
|
|
}
|
|
|
|
ulong clusters;
|
|
|
|
if(bpbKind != BpbKind.Human)
|
|
{
|
|
int reservedSectors = fakeBpb.rsectors + fakeBpb.fats_no * fakeBpb.spfat +
|
|
fakeBpb.root_ent * 32 / fakeBpb.bps;
|
|
|
|
if(fakeBpb.sectors == 0)
|
|
clusters = (ulong)(fakeBpb.spc == 0 ? fakeBpb.big_sectors - reservedSectors
|
|
: (fakeBpb.big_sectors - reservedSectors) / fakeBpb.spc);
|
|
else
|
|
clusters = (ulong)(fakeBpb.spc == 0 ? fakeBpb.sectors - reservedSectors
|
|
: (fakeBpb.sectors - reservedSectors) / fakeBpb.spc);
|
|
}
|
|
else
|
|
clusters = humanBpb.clusters == 0 ? humanBpb.big_clusters : humanBpb.clusters;
|
|
|
|
// This will walk all the FAT entries and check if they're valid FAT12 or FAT16 entries.
|
|
// If the whole table is valid in both senses, it considers the type entry in the BPB.
|
|
// BeOS is known to set the type as FAT16 but treat it as FAT12.
|
|
if(!isFat12 &&
|
|
!isFat16)
|
|
{
|
|
if(clusters < 4089)
|
|
{
|
|
var fat12 = new ushort[clusters];
|
|
|
|
_reservedSectors = fakeBpb.rsectors;
|
|
sectorsPerRealSector = fakeBpb.bps / imagePlugin.Info.SectorSize;
|
|
_fatFirstSector = partition.Start + _reservedSectors * sectorsPerRealSector;
|
|
|
|
errno = imagePlugin.ReadSectors(_fatFirstSector, fakeBpb.spfat, out byte[] fatBytes);
|
|
|
|
if(errno != ErrorNumber.NoError)
|
|
return;
|
|
|
|
var pos = 0;
|
|
|
|
for(var i = 0; i + 3 < fatBytes.Length && pos < fat12.Length; i += 3)
|
|
{
|
|
fat12[pos++] = (ushort)(((fatBytes[i + 1] & 0xF) << 8) + fatBytes[i + 0]);
|
|
|
|
if(pos >= fat12.Length)
|
|
break;
|
|
|
|
fat12[pos++] = (ushort)(((fatBytes[i + 1] & 0xF0) >> 4) + (fatBytes[i + 2] << 4));
|
|
}
|
|
|
|
bool fat12Valid = fat12[0] >= FAT12_RESERVED && fat12[1] >= FAT12_RESERVED;
|
|
|
|
foreach(ushort entry in fat12)
|
|
{
|
|
if(entry >= FAT12_RESERVED ||
|
|
entry <= clusters)
|
|
continue;
|
|
|
|
fat12Valid = false;
|
|
|
|
break;
|
|
}
|
|
|
|
ushort[] fat16 = MemoryMarshal.Cast<byte, ushort>(fatBytes).ToArray();
|
|
|
|
bool fat16Valid = fat16[0] >= FAT16_RESERVED && fat16[1] >= 0x3FF0;
|
|
|
|
foreach(ushort entry in fat16)
|
|
{
|
|
if(entry >= FAT16_RESERVED ||
|
|
entry <= clusters)
|
|
continue;
|
|
|
|
fat16Valid = false;
|
|
|
|
break;
|
|
}
|
|
|
|
isFat12 = fat12Valid;
|
|
isFat16 = fat16Valid;
|
|
|
|
// Check BPB type
|
|
if(isFat12 == isFat16)
|
|
{
|
|
isFat12 = fakeBpb.fs_type != null && Encoding.ASCII.GetString(fakeBpb.fs_type) == "FAT12 ";
|
|
|
|
isFat16 = fakeBpb.fs_type != null && Encoding.ASCII.GetString(fakeBpb.fs_type) == "FAT16 ";
|
|
}
|
|
|
|
if(!isFat12 &&
|
|
!isFat16)
|
|
isFat12 = true;
|
|
}
|
|
else
|
|
isFat16 = true;
|
|
}
|
|
|
|
if(isFat12)
|
|
{
|
|
switch(bpbKind)
|
|
{
|
|
case BpbKind.Atari:
|
|
sb.AppendLine("Atari FAT12");
|
|
|
|
break;
|
|
case BpbKind.Apricot:
|
|
sb.AppendLine("Apricot FAT12");
|
|
|
|
break;
|
|
case BpbKind.Human:
|
|
sb.AppendLine("Human68k FAT12");
|
|
|
|
break;
|
|
default:
|
|
sb.AppendLine("Microsoft FAT12");
|
|
|
|
break;
|
|
}
|
|
|
|
XmlFsType.Type = "FAT12";
|
|
}
|
|
else if(isFat16)
|
|
{
|
|
sb.AppendLine(bpbKind == BpbKind.Atari
|
|
? "Atari FAT16"
|
|
: bpbKind == BpbKind.Human
|
|
? "Human68k FAT16"
|
|
: "Microsoft FAT16");
|
|
|
|
XmlFsType.Type = "FAT16";
|
|
}
|
|
|
|
if(bpbKind == BpbKind.Atari)
|
|
{
|
|
if(atariBpb.serial_no[0] == 0x49 &&
|
|
atariBpb.serial_no[1] == 0x48 &&
|
|
atariBpb.serial_no[2] == 0x43)
|
|
sb.AppendLine("Volume has been modified by Windows 9x/Me Volume Tracker.");
|
|
else
|
|
XmlFsType.VolumeSerial = $"{atariBpb.serial_no[0]:X2}{atariBpb.serial_no[1]:X2}{
|
|
atariBpb.serial_no[2]:X2}";
|
|
|
|
XmlFsType.SystemIdentifier = StringHandlers.CToString(atariBpb.oem_name);
|
|
|
|
if(string.IsNullOrEmpty(XmlFsType.SystemIdentifier))
|
|
XmlFsType.SystemIdentifier = null;
|
|
}
|
|
else if(fakeBpb.oem_name != null)
|
|
{
|
|
if(fakeBpb.oem_name[5] == 0x49 &&
|
|
fakeBpb.oem_name[6] == 0x48 &&
|
|
fakeBpb.oem_name[7] == 0x43)
|
|
sb.AppendLine("Volume has been modified by Windows 9x/Me Volume Tracker.");
|
|
else
|
|
XmlFsType.SystemIdentifier = fakeBpb.oem_name[0] switch
|
|
{
|
|
// Later versions of Windows create a DOS 3 BPB without OEM name on 8 sectors/track floppies
|
|
// OEM ID should be ASCII, otherwise ignore it
|
|
>= 0x20 and <= 0x7F when fakeBpb.oem_name[1] >= 0x20 &&
|
|
fakeBpb.oem_name[1] <= 0x7F &&
|
|
fakeBpb.oem_name[2] >= 0x20 &&
|
|
fakeBpb.oem_name[2] <= 0x7F &&
|
|
fakeBpb.oem_name[3] >= 0x20 &&
|
|
fakeBpb.oem_name[3] <= 0x7F &&
|
|
fakeBpb.oem_name[4] >= 0x20 &&
|
|
fakeBpb.oem_name[4] <= 0x7F &&
|
|
fakeBpb.oem_name[5] >= 0x20 &&
|
|
fakeBpb.oem_name[5] <= 0x7F &&
|
|
fakeBpb.oem_name[6] >= 0x20 &&
|
|
fakeBpb.oem_name[6] <= 0x7F &&
|
|
fakeBpb.oem_name[7] >= 0x20 &&
|
|
fakeBpb.oem_name[7] <= 0x7F =>
|
|
StringHandlers.CToString(fakeBpb.oem_name),
|
|
< 0x20 when fakeBpb.oem_name[1] >= 0x20 &&
|
|
fakeBpb.oem_name[1] <= 0x7F &&
|
|
fakeBpb.oem_name[2] >= 0x20 &&
|
|
fakeBpb.oem_name[2] <= 0x7F &&
|
|
fakeBpb.oem_name[3] >= 0x20 &&
|
|
fakeBpb.oem_name[3] <= 0x7F &&
|
|
fakeBpb.oem_name[4] >= 0x20 &&
|
|
fakeBpb.oem_name[4] <= 0x7F &&
|
|
fakeBpb.oem_name[5] >= 0x20 &&
|
|
fakeBpb.oem_name[5] <= 0x7F &&
|
|
fakeBpb.oem_name[6] >= 0x20 &&
|
|
fakeBpb.oem_name[6] <= 0x7F &&
|
|
fakeBpb.oem_name[7] >= 0x20 &&
|
|
fakeBpb.oem_name[7] <= 0x7F =>
|
|
StringHandlers.CToString(fakeBpb.oem_name, Encoding, start: 1),
|
|
_ => XmlFsType.SystemIdentifier
|
|
};
|
|
|
|
if(fakeBpb.signature is 0x28 or 0x29)
|
|
XmlFsType.VolumeSerial = $"{fakeBpb.serial_no:X8}";
|
|
}
|
|
|
|
if(XmlFsType.SystemIdentifier != null)
|
|
sb.AppendFormat("OEM Name: {0}", XmlFsType.SystemIdentifier.Trim()).AppendLine();
|
|
|
|
sb.AppendFormat("{0} bytes per sector.", fakeBpb.bps).AppendLine();
|
|
|
|
if(bpbKind != BpbKind.Human)
|
|
if(fakeBpb.sectors == 0)
|
|
sb.AppendFormat("{0} sectors on volume ({1} bytes).", fakeBpb.big_sectors,
|
|
fakeBpb.big_sectors * fakeBpb.bps).AppendLine();
|
|
else
|
|
sb.AppendFormat("{0} sectors on volume ({1} bytes).", fakeBpb.sectors,
|
|
fakeBpb.sectors * fakeBpb.bps).AppendLine();
|
|
else
|
|
sb.AppendFormat("{0} sectors on volume ({1} bytes).",
|
|
clusters * humanBpb.bpc / imagePlugin.Info.SectorSize, clusters * humanBpb.bpc).
|
|
AppendLine();
|
|
|
|
XmlFsType.Clusters = clusters;
|
|
sb.AppendFormat("{0} sectors per cluster.", fakeBpb.spc).AppendLine();
|
|
sb.AppendFormat("{0} clusters on volume.", XmlFsType.Clusters).AppendLine();
|
|
XmlFsType.ClusterSize = (uint)(fakeBpb.bps * fakeBpb.spc);
|
|
sb.AppendFormat("{0} sectors reserved between BPB and FAT.", fakeBpb.rsectors).AppendLine();
|
|
sb.AppendFormat("{0} FATs.", fakeBpb.fats_no).AppendLine();
|
|
sb.AppendFormat("{0} entries on root directory.", fakeBpb.root_ent).AppendLine();
|
|
|
|
if(fakeBpb.media > 0)
|
|
sb.AppendFormat("Media descriptor: 0x{0:X2}", fakeBpb.media).AppendLine();
|
|
|
|
sb.AppendFormat("{0} sectors per FAT.", fakeBpb.spfat).AppendLine();
|
|
|
|
if(fakeBpb.sptrk is > 0 and < 64 &&
|
|
fakeBpb.heads is > 0 and < 256)
|
|
{
|
|
sb.AppendFormat("{0} sectors per track.", fakeBpb.sptrk).AppendLine();
|
|
sb.AppendFormat("{0} heads.", fakeBpb.heads).AppendLine();
|
|
}
|
|
|
|
if(fakeBpb.hsectors <= partition.Start)
|
|
sb.AppendFormat("{0} hidden sectors before BPB.", fakeBpb.hsectors).AppendLine();
|
|
|
|
if(fakeBpb.signature is 0x28 or 0x29 || andosOemCorrect)
|
|
{
|
|
sb.AppendFormat("Drive number: 0x{0:X2}", fakeBpb.drive_no).AppendLine();
|
|
|
|
if(XmlFsType.VolumeSerial != null)
|
|
sb.AppendFormat("Volume Serial Number: {0}", XmlFsType.VolumeSerial).AppendLine();
|
|
|
|
if((fakeBpb.flags & 0xF8) == 0x00)
|
|
{
|
|
if((fakeBpb.flags & 0x01) == 0x01)
|
|
{
|
|
sb.AppendLine("Volume should be checked on next mount.");
|
|
XmlFsType.Dirty = true;
|
|
}
|
|
|
|
if((fakeBpb.flags & 0x02) == 0x02)
|
|
sb.AppendLine("Disk surface should be on next mount.");
|
|
}
|
|
|
|
if(fakeBpb.signature == 0x29 || andosOemCorrect)
|
|
{
|
|
XmlFsType.VolumeName = StringHandlers.SpacePaddedToString(fakeBpb.volume_label, Encoding);
|
|
XmlFsType.VolumeName = XmlFsType.VolumeName?.Replace("\0", "");
|
|
sb.AppendFormat("Filesystem type: {0}", Encoding.ASCII.GetString(fakeBpb.fs_type)).AppendLine();
|
|
}
|
|
}
|
|
else if(bpbKind == BpbKind.Atari &&
|
|
XmlFsType.VolumeSerial != null)
|
|
sb.AppendFormat("Volume Serial Number: {0}", XmlFsType.VolumeSerial).AppendLine();
|
|
|
|
bootChk = Sha1Context.Data(fakeBpb.boot_code, out _);
|
|
|
|
// Workaround that PCExchange jumps into "FAT16 "...
|
|
if(XmlFsType.SystemIdentifier == "PCX 2.0 ")
|
|
fakeBpb.jump[1] += 8;
|
|
|
|
// Check that jumps to a correct boot code position and has boot signature set.
|
|
// This will mean that the volume will boot, even if just to say "this is not bootable change disk"......
|
|
if(XmlFsType.Bootable == false &&
|
|
fakeBpb.jump != null)
|
|
XmlFsType.Bootable |=
|
|
fakeBpb.jump[0] == 0xEB && fakeBpb.jump[1] >= minBootNearJump && fakeBpb.jump[1] < 0x80 ||
|
|
fakeBpb.jump[0] == 0xE9 && fakeBpb.jump.Length >= 3 &&
|
|
BitConverter.ToUInt16(fakeBpb.jump, 1) >= minBootNearJump &&
|
|
BitConverter.ToUInt16(fakeBpb.jump, 1) <= 0x1FC;
|
|
|
|
sectorsPerRealSector = fakeBpb.bps / imagePlugin.Info.SectorSize;
|
|
|
|
// First root directory sector
|
|
rootDirectorySector = (ulong)(fakeBpb.spfat * fakeBpb.fats_no + fakeBpb.rsectors) * sectorsPerRealSector;
|
|
|
|
sectorsForRootDirectory = (uint)(fakeBpb.root_ent * 32 / imagePlugin.Info.SectorSize);
|
|
}
|
|
|
|
if(extraInfo != null)
|
|
sb.Append(extraInfo);
|
|
|
|
if(rootDirectorySector + partition.Start < partition.End &&
|
|
imagePlugin.Info.XmlMediaType != XmlMediaType.OpticalDisc)
|
|
{
|
|
errno = imagePlugin.ReadSectors(rootDirectorySector + partition.Start, sectorsForRootDirectory,
|
|
out byte[] rootDirectory);
|
|
|
|
if(errno != ErrorNumber.NoError)
|
|
return;
|
|
|
|
if(bpbKind == BpbKind.DecRainbow)
|
|
{
|
|
var rootMs = new MemoryStream();
|
|
|
|
foreach(ulong rootSector in new ulong[]
|
|
{
|
|
0x17, 0x19, 0x1B, 0x1D, 0x1E, 0x20
|
|
})
|
|
{
|
|
errno = imagePlugin.ReadSector(rootSector, out byte[] tmp);
|
|
|
|
if(errno != ErrorNumber.NoError)
|
|
return;
|
|
|
|
rootMs.Write(tmp, 0, tmp.Length);
|
|
}
|
|
|
|
rootDirectory = rootMs.ToArray();
|
|
}
|
|
|
|
for(var i = 0; i < rootDirectory.Length; i += 32)
|
|
{
|
|
// Not a correct entry
|
|
if(rootDirectory[i] < DIRENT_MIN &&
|
|
rootDirectory[i] != DIRENT_E5)
|
|
continue;
|
|
|
|
// Deleted or subdirectory entry
|
|
if(rootDirectory[i] == DIRENT_SUBDIR ||
|
|
rootDirectory[i] == DIRENT_DELETED)
|
|
continue;
|
|
|
|
// Not a volume label
|
|
if(rootDirectory[i + 0x0B] != 0x08 &&
|
|
rootDirectory[i + 0x0B] != 0x28)
|
|
continue;
|
|
|
|
DirectoryEntry entry = Marshal.ByteArrayToStructureLittleEndian<DirectoryEntry>(rootDirectory, i, 32);
|
|
|
|
var fullname = new byte[11];
|
|
Array.Copy(entry.filename, 0, fullname, 0, 8);
|
|
Array.Copy(entry.extension, 0, fullname, 8, 3);
|
|
string volname = Encoding.GetString(fullname).Trim();
|
|
|
|
if(!string.IsNullOrEmpty(volname))
|
|
XmlFsType.VolumeName = entry.caseinfo.HasFlag(CaseInfo.AllLowerCase) ? volname.ToLower() : volname;
|
|
|
|
if(entry.ctime > 0 &&
|
|
entry.cdate > 0)
|
|
{
|
|
XmlFsType.CreationDate = DateHandlers.DosToDateTime(entry.cdate, entry.ctime);
|
|
|
|
if(entry.ctime_ms > 0)
|
|
XmlFsType.CreationDate = XmlFsType.CreationDate.AddMilliseconds(entry.ctime_ms * 10);
|
|
|
|
XmlFsType.CreationDateSpecified = true;
|
|
sb.AppendFormat("Volume created on {0}", XmlFsType.CreationDate).AppendLine();
|
|
}
|
|
|
|
if(entry.mtime > 0 &&
|
|
entry.mdate > 0)
|
|
{
|
|
XmlFsType.ModificationDate = DateHandlers.DosToDateTime(entry.mdate, entry.mtime);
|
|
XmlFsType.ModificationDateSpecified = true;
|
|
sb.AppendFormat("Volume last modified on {0}", XmlFsType.ModificationDate).AppendLine();
|
|
}
|
|
|
|
if(entry.adate > 0)
|
|
sb.AppendFormat("Volume last accessed on {0:d}", DateHandlers.DosToDateTime(entry.adate, 0)).
|
|
AppendLine();
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!string.IsNullOrEmpty(XmlFsType.VolumeName))
|
|
sb.AppendFormat("Volume label: {0}", XmlFsType.VolumeName).AppendLine();
|
|
|
|
if(XmlFsType.Bootable)
|
|
{
|
|
switch(bpbSector[0])
|
|
{
|
|
// Intel short jump
|
|
case 0xEB when bpbSector[1] < 0x80:
|
|
{
|
|
int sigSize = bpbSector[510] == 0x55 && bpbSector[511] == 0xAA ? 2 : 0;
|
|
var bootCode = new byte[512 - sigSize - bpbSector[1] - 2];
|
|
Array.Copy(bpbSector, bpbSector[1] + 2, bootCode, 0, bootCode.Length);
|
|
Sha1Context.Data(bootCode, out _);
|
|
|
|
break;
|
|
}
|
|
|
|
// Intel big jump
|
|
case 0xE9 when BitConverter.ToUInt16(bpbSector, 1) < 0x1FC:
|
|
{
|
|
int sigSize = bpbSector[510] == 0x55 && bpbSector[511] == 0xAA ? 2 : 0;
|
|
var bootCode = new byte[512 - sigSize - BitConverter.ToUInt16(bpbSector, 1) - 3];
|
|
Array.Copy(bpbSector, BitConverter.ToUInt16(bpbSector, 1) + 3, bootCode, 0, bootCode.Length);
|
|
Sha1Context.Data(bootCode, out _);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
sb.AppendLine("Volume is bootable");
|
|
sb.AppendFormat("Boot code's SHA1: {0}", bootChk).AppendLine();
|
|
string bootName = _knownBootHashes.FirstOrDefault(t => t.hash == bootChk).name;
|
|
|
|
if(string.IsNullOrWhiteSpace(bootName))
|
|
sb.AppendLine("Unknown boot code.");
|
|
else
|
|
sb.AppendFormat("Boot code corresponds to {0}", bootName).AppendLine();
|
|
}
|
|
|
|
information = sb.ToString();
|
|
}
|
|
} |