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Aaru/Aaru.Partitions/GPT.cs

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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : GPT.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Partitioning scheme plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Manages GUID Partition Table.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2021 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Runtime.InteropServices;
using Aaru.CommonTypes;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Interfaces;
using Aaru.Console;
using Marshal = Aaru.Helpers.Marshal;
namespace Aaru.Partitions
{
/// <inheritdoc />
/// <summary>
/// Implements decoding of the GUID Partition Table
/// </summary>
[SuppressMessage("ReSharper", "UnusedMember.Local")]
public sealed class GuidPartitionTable : IPartition
{
const ulong GPT_MAGIC = 0x5452415020494645;
const uint GPT_REVISION1 = 0x00010000;
/// <inheritdoc />
public string Name => "GUID Partition Table";
/// <inheritdoc />
public Guid Id => new Guid("CBC9D281-C1D0-44E8-9038-4D66FD2678AB");
/// <inheritdoc />
public string Author => "Natalia Portillo";
/// <inheritdoc />
public bool GetInformation(IMediaImage imagePlugin, out List<Partition> partitions, ulong sectorOffset)
{
partitions = new List<Partition>();
if(sectorOffset + 2 >= imagePlugin.Info.Sectors)
return false;
byte[] hdrBytes = imagePlugin.ReadSector(1 + sectorOffset);
Header hdr;
ulong signature = BitConverter.ToUInt64(hdrBytes, 0);
bool misaligned = false;
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.signature = 0x{0:X16}", signature);
if(signature != GPT_MAGIC)
if(imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
{
hdrBytes = imagePlugin.ReadSector(sectorOffset);
signature = BitConverter.ToUInt64(hdrBytes, 512);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.signature @ 0x200 = 0x{0:X16}", signature);
if(signature == GPT_MAGIC)
{
AaruConsole.DebugWriteLine("GPT Plugin", "Found unaligned signature", signature);
byte[] real = new byte[512];
Array.Copy(hdrBytes, 512, real, 0, 512);
hdrBytes = real;
misaligned = true;
}
else
return false;
}
else
return false;
try
{
hdr = Marshal.ByteArrayToStructureLittleEndian<Header>(hdrBytes);
}
catch
{
return false;
}
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.revision = 0x{0:X8}", hdr.revision);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.headerSize = {0}", hdr.headerSize);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.headerCrc = 0x{0:X8}", hdr.headerCrc);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.reserved = 0x{0:X8}", hdr.reserved);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.myLBA = {0}", hdr.myLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.alternateLBA = {0}", hdr.alternateLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.firstUsableLBA = {0}", hdr.firstUsableLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.lastUsableLBA = {0}", hdr.lastUsableLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.diskGuid = {0}", hdr.diskGuid);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.entryLBA = {0}", hdr.entryLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.entries = {0}", hdr.entries);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.entriesSize = {0}", hdr.entriesSize);
AaruConsole.DebugWriteLine("GPT Plugin", "hdr.entriesCrc = 0x{0:X8}", hdr.entriesCrc);
if(hdr.signature != GPT_MAGIC)
return false;
if(hdr.myLBA != 1 + sectorOffset)
return false;
uint divisor, modulo, sectorSize;
if(misaligned)
{
divisor = 4;
modulo = (uint)(hdr.entryLBA % divisor);
sectorSize = 512;
}
else
{
divisor = 1;
modulo = 0;
sectorSize = imagePlugin.Info.SectorSize;
}
uint totalEntriesSectors = (hdr.entries * hdr.entriesSize) / imagePlugin.Info.SectorSize;
if((hdr.entries * hdr.entriesSize) % imagePlugin.Info.SectorSize > 0)
totalEntriesSectors++;
byte[] temp = imagePlugin.ReadSectors(hdr.entryLBA / divisor, totalEntriesSectors + modulo);
byte[] entriesBytes = new byte[temp.Length - (modulo * 512)];
Array.Copy(temp, modulo * 512, entriesBytes, 0, entriesBytes.Length);
List<Entry> entries = new List<Entry>();
for(int i = 0; i < hdr.entries; i++)
{
try
{
byte[] entryBytes = new byte[hdr.entriesSize];
Array.Copy(entriesBytes, hdr.entriesSize * i, entryBytes, 0, hdr.entriesSize);
entries.Add(Marshal.ByteArrayToStructureLittleEndian<Entry>(entryBytes));
}
#pragma warning disable RECS0022 // A catch clause that catches System.Exception and has an empty body
catch
{
// ignored
}
#pragma warning restore RECS0022 // A catch clause that catches System.Exception and has an empty body
}
if(entries.Count == 0)
return false;
ulong pSeq = 0;
foreach(Entry entry in entries.Where(entry => entry.partitionType != Guid.Empty &&
entry.partitionId != Guid.Empty))
{
AaruConsole.DebugWriteLine("GPT Plugin", "entry.partitionType = {0}", entry.partitionType);
AaruConsole.DebugWriteLine("GPT Plugin", "entry.partitionId = {0}", entry.partitionId);
AaruConsole.DebugWriteLine("GPT Plugin", "entry.startLBA = {0}", entry.startLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "entry.endLBA = {0}", entry.endLBA);
AaruConsole.DebugWriteLine("GPT Plugin", "entry.attributes = 0x{0:X16}", entry.attributes);
AaruConsole.DebugWriteLine("GPT Plugin", "entry.name = {0}", entry.name);
if(entry.startLBA / divisor > imagePlugin.Info.Sectors ||
entry.endLBA / divisor > imagePlugin.Info.Sectors)
return false;
var part = new Partition
{
Description = $"ID: {entry.partitionId}",
Size = ((entry.endLBA - entry.startLBA) + 1) * sectorSize,
Name = entry.name,
Length = ((entry.endLBA - entry.startLBA) + 1) / divisor,
Sequence = pSeq++,
Offset = entry.startLBA * sectorSize,
Start = entry.startLBA / divisor,
Type = GetGuidTypeName(entry.partitionType),
Scheme = Name
};
AaruConsole.DebugWriteLine("GPT Plugin", "part.PartitionType = {0}", part.Type);
partitions.Add(part);
}
return true;
}
static string GetGuidTypeName(Guid type)
{
string strType = type.ToString().ToUpperInvariant();
switch(strType)
{
case "024DEE41-33E7-11D3-9D69-0008C781F39F": return "MBR scheme";
case "C12A7328-F81F-11D2-BA4B-00A0C93EC93B": return "EFI System";
case "21686148-6449-6E6F-744E-656564454649": return "BIOS Boot";
case "D3BFE2DE-3DAF-11DF-BA40-E3A556D89593": return "Intel Fast Flash (iFFS)";
case "F4019732-066E-4E12-8273-346C5641494F": return "Sony boot";
case "BFBFAFE7-A34F-448A-9A5B-6213EB736C22": return "Lenovo boot";
case "E3C9E316-0B5C-4DB8-817D-F92DF00215AE": return "Microsoft Reserved (MSR)";
case "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7": return "Microsoft Basic data";
case "5808C8AA-7E8F-42E0-85D2-E1E90434CFB3": return "Logical Disk Manager (LDM) metadata";
case "AF9B60A0-1431-4F62-BC68-3311714A69AD": return "Logical Disk Manager data";
case "DE94BBA4-06D1-4D40-A16A-BFD50179D6AC": return "Windows Recovery Environment";
case "37AFFC90-EF7D-4E96-91C3-2D7AE055B174": return "IBM General Parallel File System (GPFS)";
case "E75CAF8F-F680-4CEE-AFA3-B001E56EFC2D": return "Windows Storage Spaces";
case "75894C1E-3AEB-11D3-B7C1-7B03A0000000": return "HP-UX Data";
case "E2A1E728-32E3-11D6-A682-7B03A0000000": return "HP-UX Service";
case "0FC63DAF-8483-4772-8E79-3D69D8477DE4": return "Linux filesystem";
case "A19D880F-05FC-4D3B-A006-743F0F84911E": return "Linux RAID";
case "44479540-F297-41B2-9AF7-D131D5F0458A": return "Linux Root (x86)";
case "4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709": return "Linux Root (x86-64)";
case "69DAD710-2CE4-4E3C-B16C-21A1D49ABED3": return "Linux Root (32-bit ARM)";
case "B921B045-1DF0-41C3-AF44-4C6F280D3FAE": return "Linux Root (64-bit ARM/AArch64)";
case "0657FD6D-A4AB-43C4-84E5-0933C84B4F4F": return "Linux Swap";
case "E6D6D379-F507-44C2-A23C-238F2A3DF928": return "Logical Volume Manager (LVM)";
case "933AC7E1-2EB4-4F13-B844-0E14E2AEF915": return "Linux /home";
case "3B8F8425-20E0-4F3B-907F-1A25A76F98E8": return "Linux /srv";
case "7FFEC5C9-2D00-49B7-8941-3EA10A5586B7": return "Plain dm-crypt";
case "CA7D7CCB-63ED-4C53-861C-1742536059CC": return "LUKS";
case "8DA63339-0007-60C0-C436-083AC8230908": return "Linux Reserved";
case "83BD6B9D-7F41-11DC-BE0B-001560B84F0F": return "FreeBSD Boot";
case "516E7CB4-6ECF-11D6-8FF8-00022D09712B": return "FreeBSD Data";
case "516E7CB5-6ECF-11D6-8FF8-00022D09712B": return "FreeBSD Swap";
case "516E7CB6-6ECF-11D6-8FF8-00022D09712B": return "FreeBSD UFS";
case "516E7CB7-6ECF-11D6-8FF8-00022D09712B": return "FreeBSD UFS2";
case "516E7CB8-6ECF-11D6-8FF8-00022D09712B": return "FreeBSD Vinum";
case "516E7CBA-6ECF-11D6-8FF8-00022D09712B": return "FreeBSD ZFS";
case "74BA7DD9-A689-11E1-BD04-00E081286ACF": return "FreeBSD nandfs";
case "48465300-0000-11AA-AA11-00306543ECAC": return "Apple HFS";
case "55465300-0000-11AA-AA11-00306543ECAC": return "Apple UFS";
case "52414944-0000-11AA-AA11-00306543ECAC": return "Apple RAID";
case "52414944-5F4F-11AA-AA11-00306543ECAC": return "Apple RAID, offline";
case "426F6F74-0000-11AA-AA11-00306543ECAC": return "Apple Boot";
case "4C616265-6C00-11AA-AA11-00306543ECAC": return "Apple Label";
case "5265636F-7665-11AA-AA11-00306543ECAC": return "Apple TV Recovery";
case "53746F72-6167-11AA-AA11-00306543ECAC": return "Apple Core Storage";
case "6A82CB45-1DD2-11B2-99A6-080020736631": return "Solaris Boot";
case "6A85CF4D-1DD2-11B2-99A6-080020736631": return "Solaris Root";
case "6A87C46F-1DD2-11B2-99A6-080020736631": return "Solaris Swap";
case "6A8B642B-1DD2-11B2-99A6-080020736631": return "Solaris Backup";
case "6A898CC3-1DD2-11B2-99A6-080020736631": return "Solaris /usr or Apple ZFS";
case "6A8EF2E9-1DD2-11B2-99A6-080020736631": return "Solaris /var";
case "6A90BA39-1DD2-11B2-99A6-080020736631": return "Solaris /home";
case "6A9283A5-1DD2-11B2-99A6-080020736631": return "Solaris Alternate sector";
case "6A945A3B-1DD2-11B2-99A6-080020736631":
case "6A9630D1-1DD2-11B2-99A6-080020736631":
case "6A980767-1DD2-11B2-99A6-080020736631":
case "6A96237F-1DD2-11B2-99A6-080020736631":
case "6A8D2AC7-1DD2-11B2-99A6-080020736631": return "Solaris Reserved";
case "49F48D32-B10E-11DC-B99B-0019D1879648": return "NetBSD Swap";
case "49F48D5A-B10E-11DC-B99B-0019D1879648": return "NetBSD FFS";
case "49F48D82-B10E-11DC-B99B-0019D1879648": return "NetBSD LFS";
case "49F48DAA-B10E-11DC-B99B-0019D1879648": return "NetBSD RAID";
case "2DB519C4-B10F-11DC-B99B-0019D1879648": return "NetBSD Concatenated";
case "2DB519EC-B10F-11DC-B99B-0019D1879648": return "NetBSD Encrypted";
case "FE3A2A5D-4F32-41A7-B725-ACCC3285A309": return "ChromeOS kernel";
case "3CB8E202-3B7E-47DD-8A3C-7FF2A13CFCEC": return "ChromeOS rootfs";
case "2E0A753D-9E48-43B0-8337-B15192CB1B5E": return "ChromeOS future use";
case "42465331-3BA3-10F1-802A-4861696B7521": return "Haiku BFS";
case "85D5E45E-237C-11E1-B4B3-E89A8F7FC3A7": return "MidnightBSD Boot";
case "85D5E45A-237C-11E1-B4B3-E89A8F7FC3A7": return "MidnightBSD Data";
case "85D5E45B-237C-11E1-B4B3-E89A8F7FC3A7": return "MidnightBSD Swap";
case "0394EF8B-237E-11E1-B4B3-E89A8F7FC3A7": return "MidnightBSD UFS";
case "85D5E45C-237C-11E1-B4B3-E89A8F7FC3A7": return "MidnightBSD Vinum";
case "85D5E45D-237C-11E1-B4B3-E89A8F7FC3A7": return "MidnightBSD ZFS";
case "45B0969E-9B03-4F30-B4C6-B4B80CEFF106": return "Ceph Journal";
case "45B0969E-9B03-4F30-B4C6-5EC00CEFF106": return "Ceph dm-crypt Encrypted Journal";
case "4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D": return "Ceph OSD";
case "4FBD7E29-9D25-41B8-AFD0-5EC00CEFF05D": return "Ceph dm-crypt OSD";
case "89C57F98-2FE5-4DC0-89C1-F3AD0CEFF2BE": return "Ceph disk in creation";
case "89C57F98-2FE5-4DC0-89C1-5EC00CEFF2BE": return "Ceph dm-crypt disk in creation";
case "824CC7A0-36A8-11E3-890A-952519AD3F61": return "OpenBSD Data";
case "CEF5A9AD-73BC-4601-89F3-CDEEEEE321A1": return "QNX Power-safe (QNX6)";
case "C91818F9-8025-47AF-89D2-F030D7000C2C": return "Plan 9";
case "9D275380-40AD-11DB-BF97-000C2911D1B8": return "VMware vmkcore (coredump)";
case "AA31E02A-400F-11DB-9590-000C2911D1B8": return "VMware VMFS";
case "9198EFFC-31C0-11DB-8F78-000C2911D1B8": return "VMware Reserved";
case "7412F7D5-A156-4B13-81DC-867174929325": return "ONIE boot";
case "D4E6E2CD-4469-46F3-B5CB-1BFF57AFC149": return "ONIE config";
case "9E1A2D38-C612-4316-AA26-8B49521E5A8B": return "PowerPC PReP boot";
case "0311FC50-01CA-4725-AD77-9ADBB20ACE98": return "Acronis Secure Zone";
case "7C3457EF-0000-11AA-AA11-00306543ECAC": return "Apple File System";
case "9D087404-1CA5-11DC-8817-01301BB8A9F5": return "DragonflyBSD Label";
case "9D58FDBD-1CA5-11DC-8817-01301BB8A9F5": return "DragonflyBSD Swap";
case "9D94CE7C-1CA5-11DC-8817-01301BB8A9F5": return "DragonflyBSD UFS";
case "9DD4478F-1CA5-11DC-8817-01301BB8A9F5": return "DragonflyBSD Vinum";
case "DBD5211B-1CA5-11DC-8817-01301BB8A9F5": return "DragonflyBSD CCD";
case "3D48CE54-1D16-11DC-8817-01301BB8A9F5": return "DragonflyBSD Label";
case "BD215AB2-1D16-11DC-8696-01301BB8A9F5": return "DragonflyBSD Legacy";
case "61DC63AC-6E38-11DC-8513-01301BB8A9F5": return "DragonflyBSD Hammer";
case "5CBB9AD1-862D-11DC-A94D-01301BB8A9F5": return "DragonflyBSD Hammer2";
default: return "";
}
}
[StructLayout(LayoutKind.Sequential)]
struct Header
{
public readonly ulong signature;
public readonly uint revision;
public readonly uint headerSize;
public readonly uint headerCrc;
public readonly uint reserved;
public readonly ulong myLBA;
public readonly ulong alternateLBA;
public readonly ulong firstUsableLBA;
public readonly ulong lastUsableLBA;
public readonly Guid diskGuid;
public readonly ulong entryLBA;
public readonly uint entries;
public readonly uint entriesSize;
public readonly uint entriesCrc;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
struct Entry
{
public readonly Guid partitionType;
public readonly Guid partitionId;
public readonly ulong startLBA;
public readonly ulong endLBA;
public readonly ulong attributes;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 36)]
public readonly string name;
}
}
}
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