mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-23 21:55:34 +08:00
3c3f2013ef
(ExeFile): limited support for 16-bit Windows executables. (MbImageFormat): recognize 'MK' signature. (XP3, VF, YPF): added common executable signature. (PICT): improved parser. (Macromedia): improved support, recognize archives within windows executables. (SEEN): fixed decompression.
498 lines
19 KiB
C#
498 lines
19 KiB
C#
//! \file ExeFile.cs
|
|
//! \date Mon Jan 23 05:12:50 2017
|
|
//! \brief Win32 EXE file parser/accessor.
|
|
//
|
|
// Copyright (C) 2017 by morkt
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel;
|
|
using System.Linq;
|
|
using System.Runtime.InteropServices;
|
|
using System.Text;
|
|
using GameRes.Utility;
|
|
|
|
namespace GameRes.Formats
|
|
{
|
|
public class ExeFile
|
|
{
|
|
ArcView m_file;
|
|
Dictionary<string, Section> m_section_table;
|
|
Section m_overlay;
|
|
uint m_image_base = 0;
|
|
List<ImageSection> m_section_list;
|
|
bool? m_is_NE;
|
|
|
|
public ExeFile (ArcView file)
|
|
{
|
|
if (!file.View.AsciiEqual (0, "MZ"))
|
|
throw new InvalidFormatException ("File is not a valid win32 executable.");
|
|
m_file = file;
|
|
Whole = new Section { Offset = 0, Size = (uint)Math.Min (m_file.MaxOffset, uint.MaxValue) };
|
|
}
|
|
|
|
public ArcView.Frame View { get { return m_file.View; } }
|
|
|
|
/// <summary>
|
|
/// Section representing the whole file.
|
|
/// </summary>
|
|
public Section Whole { get; private set; }
|
|
|
|
public bool IsWin16 => m_is_NE ?? (m_is_NE = IsNe()).Value;
|
|
|
|
private bool IsNe ()
|
|
{
|
|
uint ne_offset = View.ReadUInt32 (0x3C);
|
|
return ne_offset < m_file.MaxOffset-2 && View.AsciiEqual (ne_offset, "NE");
|
|
}
|
|
|
|
/// <summary>
|
|
/// Dictionary of executable file sections.
|
|
/// </summary>
|
|
///
|
|
public IReadOnlyDictionary<string, Section> Sections
|
|
{
|
|
get
|
|
{
|
|
if (null == m_section_table)
|
|
InitSectionTable();
|
|
return m_section_table;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Overlay section of executable file.
|
|
/// </summary>
|
|
public Section Overlay
|
|
{
|
|
get
|
|
{
|
|
if (null == m_section_table)
|
|
InitSectionTable();
|
|
return m_overlay;
|
|
}
|
|
}
|
|
|
|
public uint ImageBase
|
|
{
|
|
get
|
|
{
|
|
if (0 == m_image_base)
|
|
InitImageBase();
|
|
return m_image_base;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Structure representing section of executable file in the form of its offset and size.
|
|
/// </summary>
|
|
public struct Section
|
|
{
|
|
public long Offset;
|
|
public uint Size;
|
|
}
|
|
|
|
public class ImageSection // IMAGE_SECTION_HEADER
|
|
{
|
|
public string Name;
|
|
public uint VirtualSize;
|
|
public uint VirtualAddress;
|
|
public uint SizeOfRawData;
|
|
public uint PointerToRawData;
|
|
public uint Characteristics;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if executable file contains section <paramref name="name"/>.
|
|
/// </summary>
|
|
public bool ContainsSection (string name)
|
|
{
|
|
return Sections.ContainsKey (name);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Search for byte sequence within specified section.
|
|
/// </summary>
|
|
/// <returns>Offset of byte sequence, if found, -1 otherwise.</returns>
|
|
public long FindString (Section section, byte[] seq, int step = 1)
|
|
{
|
|
if (step <= 0)
|
|
throw new ArgumentOutOfRangeException ("step", "Search step should be positive integer.");
|
|
long offset = section.Offset;
|
|
if (offset < 0 || offset > m_file.MaxOffset)
|
|
throw new ArgumentOutOfRangeException ("section", "Invalid executable file section specified.");
|
|
uint seq_length = (uint)seq.Length;
|
|
if (0 == seq_length || section.Size < seq_length)
|
|
return -1;
|
|
long end_offset = Math.Min (m_file.MaxOffset, offset + section.Size);
|
|
unsafe
|
|
{
|
|
while (offset < end_offset)
|
|
{
|
|
uint page_size = (uint)Math.Min (0x10000L, end_offset - offset);
|
|
if (page_size < seq_length)
|
|
break;
|
|
using (var view = m_file.CreateViewAccessor (offset, page_size))
|
|
using (var ptr = new ViewPointer (view, offset))
|
|
{
|
|
byte* page_begin = ptr.Value;
|
|
byte* page_end = page_begin + page_size - seq_length;
|
|
byte* p;
|
|
for (p = page_begin; p <= page_end; p += step)
|
|
{
|
|
int i = 0;
|
|
while (p[i] == seq[i])
|
|
{
|
|
if (++i == seq.Length)
|
|
return offset + (p - page_begin);
|
|
}
|
|
}
|
|
offset += p - page_begin;
|
|
}
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
public Section SectionByOffset (long offset)
|
|
{
|
|
foreach (var section in Sections.Values)
|
|
{
|
|
if (offset >= section.Offset && offset < section.Offset + section.Size)
|
|
return section;
|
|
}
|
|
return new Section { Offset = Whole.Size, Size = 0 };
|
|
}
|
|
|
|
public long FindAsciiString (Section section, string seq, int step = 1)
|
|
{
|
|
return FindString (section, Encoding.ASCII.GetBytes (seq), step);
|
|
}
|
|
|
|
public long FindSignature (Section section, uint signature, int step = 4)
|
|
{
|
|
var bytes = new byte[4];
|
|
LittleEndian.Pack (signature, bytes, 0);
|
|
return FindString (section, bytes, step);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Convert virtual address into raw file offset.
|
|
/// </summary>
|
|
public long GetAddressOffset (uint address)
|
|
{
|
|
var section = GetAddressSection (address);
|
|
if (null == section)
|
|
return m_file.MaxOffset;
|
|
uint rva = address - ImageBase;
|
|
return section.PointerToRawData + (rva - section.VirtualAddress);
|
|
}
|
|
|
|
public string GetCString (uint address)
|
|
{
|
|
return GetCString (address, Encodings.cp932);
|
|
}
|
|
|
|
static readonly byte[] ZeroByte = new byte[1] { 0 };
|
|
|
|
/// <summary>
|
|
/// Returns null-terminated string from specified virtual address.
|
|
/// </summary>
|
|
public string GetCString (uint address, Encoding enc)
|
|
{
|
|
var section = GetAddressSection (address);
|
|
if (null == section)
|
|
return null;
|
|
uint rva = address - ImageBase;
|
|
uint offset = section.PointerToRawData + (rva - section.VirtualAddress);
|
|
uint size = section.PointerToRawData + section.SizeOfRawData - offset;
|
|
long eos = FindString (new Section { Offset = offset, Size = size }, ZeroByte);
|
|
if (eos < 0)
|
|
return null;
|
|
return View.ReadString (offset, (uint)(eos - offset), enc);
|
|
}
|
|
|
|
private ImageSection GetAddressSection (uint address)
|
|
{
|
|
var img_base = ImageBase;
|
|
if (address < img_base)
|
|
throw new ArgumentException ("Invalid virtual address.");
|
|
if (null == m_section_list)
|
|
InitSectionTable();
|
|
uint rva = address - img_base;
|
|
foreach (var section in m_section_list)
|
|
{
|
|
if (rva >= section.VirtualAddress && rva < section.VirtualAddress + section.SizeOfRawData)
|
|
return section;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private void InitImageBase ()
|
|
{
|
|
long hdr_offset = GetHeaderOffset() + 0x18;
|
|
if (View.ReadUInt16 (hdr_offset) != 0x010B)
|
|
throw new InvalidFormatException ("File is not a valid Windows 32-bit executable.");
|
|
m_image_base = View.ReadUInt32 (hdr_offset+0x1C); // ImageBase
|
|
}
|
|
|
|
private long GetHeaderOffset ()
|
|
{
|
|
long pe_offset = View.ReadUInt32 (0x3C);
|
|
if (pe_offset >= m_file.MaxOffset-0x58 || !View.AsciiEqual (pe_offset, "PE\0\0"))
|
|
throw new InvalidFormatException ("File is not a valid Windows 32-bit executable.");
|
|
return pe_offset;
|
|
}
|
|
|
|
private void InitSectionTable ()
|
|
{
|
|
if (IsWin16)
|
|
{
|
|
InitNe();
|
|
return;
|
|
}
|
|
long pe_offset = GetHeaderOffset();
|
|
int opt_header = View.ReadUInt16 (pe_offset+0x14); // SizeOfOptionalHeader
|
|
long section_table = pe_offset+opt_header+0x18;
|
|
long offset = View.ReadUInt32 (pe_offset+0x54); // SizeOfHeaders
|
|
int count = View.ReadUInt16 (pe_offset+6); // NumberOfSections
|
|
var table = new Dictionary<string, Section> (count);
|
|
var list = new List<ImageSection> (count);
|
|
if (section_table + 0x28*count < m_file.MaxOffset)
|
|
{
|
|
for (int i = 0; i < count; ++i)
|
|
{
|
|
var name = View.ReadString (section_table, 8);
|
|
var img_section = new ImageSection {
|
|
Name = name,
|
|
VirtualSize = View.ReadUInt32 (section_table+0x08),
|
|
VirtualAddress = View.ReadUInt32 (section_table+0x0C),
|
|
SizeOfRawData = View.ReadUInt32 (section_table+0x10),
|
|
PointerToRawData = View.ReadUInt32 (section_table+0x14),
|
|
Characteristics = View.ReadUInt32 (section_table+0x24),
|
|
};
|
|
var section = new Section {
|
|
Offset = img_section.PointerToRawData,
|
|
Size = img_section.SizeOfRawData
|
|
};
|
|
list.Add (img_section);
|
|
if (!table.ContainsKey (name))
|
|
table.Add (name, section);
|
|
if (0 != section.Size)
|
|
offset = Math.Max (section.Offset + section.Size, offset);
|
|
section_table += 0x28;
|
|
}
|
|
}
|
|
offset = Math.Min ((offset + 0xF) & ~0xFL, m_file.MaxOffset);
|
|
m_overlay.Offset = offset;
|
|
m_overlay.Size = (uint)(m_file.MaxOffset - offset);
|
|
m_section_table = table;
|
|
m_section_list = list;
|
|
}
|
|
|
|
void InitNe ()
|
|
{
|
|
uint ne_offset = m_file.View.ReadUInt32 (0x3C);
|
|
int segment_count = m_file.View.ReadUInt16 (ne_offset + 0x1C);
|
|
uint seg_table = m_file.View.ReadUInt16 (ne_offset + 0x22) + ne_offset;
|
|
int shift = m_file.View.ReadUInt16 (ne_offset + 0x32);
|
|
uint last_seg_end = 0;
|
|
for (int i = 0; i < segment_count; ++i)
|
|
{
|
|
uint offset = (uint)m_file.View.ReadUInt16 (seg_table) << shift;
|
|
uint size = m_file.View.ReadUInt16 (seg_table+2);
|
|
if (offset + size > last_seg_end)
|
|
last_seg_end = offset + size;
|
|
}
|
|
m_overlay.Offset = last_seg_end;
|
|
m_overlay.Size = (uint)(m_file.MaxOffset - last_seg_end);
|
|
m_section_table = new Dictionary<string, Section>(); // these are empty for 16-bit executables
|
|
m_section_list = new List<ImageSection>(); //
|
|
}
|
|
|
|
/// <summary>
|
|
/// Helper class for executable file resources access.
|
|
/// </summary>
|
|
public sealed class ResourceAccessor : IDisposable
|
|
{
|
|
IntPtr m_exe;
|
|
|
|
public ResourceAccessor (string filename)
|
|
{
|
|
const uint LOAD_LIBRARY_AS_DATAFILE = 0x02;
|
|
const uint LOAD_LIBRARY_AS_IMAGE_RESOURCE = 0x20;
|
|
|
|
m_exe = NativeMethods.LoadLibraryEx (filename, IntPtr.Zero, LOAD_LIBRARY_AS_DATAFILE|LOAD_LIBRARY_AS_IMAGE_RESOURCE);
|
|
if (IntPtr.Zero == m_exe)
|
|
throw new Win32Exception (Marshal.GetLastWin32Error());
|
|
}
|
|
|
|
public byte[] GetResource (string name, string type)
|
|
{
|
|
var res = FindResource (name, type);
|
|
if (IntPtr.Zero == res)
|
|
return null;
|
|
var src = LockResource (res);
|
|
if (IntPtr.Zero == src)
|
|
return null;
|
|
uint size = NativeMethods.SizeofResource (m_exe, res);
|
|
var dst = new byte[size];
|
|
Marshal.Copy (src, dst, 0, dst.Length);
|
|
return dst;
|
|
}
|
|
|
|
public int ReadResource (string name, string type, byte[] dest, int pos)
|
|
{
|
|
var res = FindResource (name, type);
|
|
if (IntPtr.Zero == res)
|
|
return 0;
|
|
var src = LockResource (res);
|
|
if (IntPtr.Zero == src)
|
|
return 0;
|
|
int length = (int)NativeMethods.SizeofResource (m_exe, res);
|
|
length = Math.Min (dest.Length - pos, length);
|
|
Marshal.Copy (src, dest, pos, length);
|
|
return length;
|
|
}
|
|
|
|
public uint GetResourceSize (string name, string type)
|
|
{
|
|
var res = FindResource (name, type);
|
|
if (IntPtr.Zero == res)
|
|
return 0;
|
|
return NativeMethods.SizeofResource (m_exe, res);
|
|
}
|
|
|
|
private IntPtr FindResource (string name, string type)
|
|
{
|
|
if (m_disposed)
|
|
throw new ObjectDisposedException ("Access to disposed ResourceAccessor object failed.");
|
|
return NativeMethods.FindResource (m_exe, name, type);
|
|
}
|
|
|
|
private IntPtr LockResource (IntPtr res)
|
|
{
|
|
var glob = NativeMethods.LoadResource (m_exe, res);
|
|
if (IntPtr.Zero == glob)
|
|
return IntPtr.Zero;
|
|
return NativeMethods.LockResource (glob);
|
|
}
|
|
|
|
public IEnumerable<string> EnumTypes ()
|
|
{
|
|
var types = new List<string>();
|
|
if (!NativeMethods.EnumResourceTypes (m_exe, (m, t, p) => AddResourceName (types, t), IntPtr.Zero))
|
|
return Enumerable.Empty<string>();
|
|
return types;
|
|
}
|
|
|
|
public IEnumerable<string> EnumNames (string type)
|
|
{
|
|
var names = new List<string>();
|
|
if (!NativeMethods.EnumResourceNames (m_exe, type, (m, t, n, p) => AddResourceName (names, n), IntPtr.Zero))
|
|
return Enumerable.Empty<string>();
|
|
return names;
|
|
}
|
|
|
|
private static bool AddResourceName (List<string> list, IntPtr name)
|
|
{
|
|
list.Add (ResourceNameToString (name));
|
|
return true;
|
|
}
|
|
|
|
private static string ResourceNameToString (IntPtr resName)
|
|
{
|
|
if ((resName.ToInt64() >> 16) == 0)
|
|
{
|
|
return "#" + resName.ToString();
|
|
}
|
|
else
|
|
{
|
|
return Marshal.PtrToStringUni (resName);
|
|
}
|
|
}
|
|
|
|
#region IDisposable implementation
|
|
bool m_disposed = false;
|
|
public void Dispose ()
|
|
{
|
|
Dispose (true);
|
|
GC.SuppressFinalize (this);
|
|
}
|
|
|
|
~ResourceAccessor ()
|
|
{
|
|
Dispose (false);
|
|
}
|
|
|
|
void Dispose (bool disposing)
|
|
{
|
|
if (!m_disposed)
|
|
{
|
|
NativeMethods.FreeLibrary (m_exe);
|
|
m_disposed = true;
|
|
}
|
|
}
|
|
#endregion
|
|
}
|
|
}
|
|
|
|
static internal class NativeMethods
|
|
{
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern IntPtr LoadLibraryEx (string lpFileName, IntPtr hReservedNull, uint dwFlags);
|
|
|
|
[DllImport("kernel32.dll", SetLastError = true)]
|
|
[return: MarshalAs(UnmanagedType.Bool)]
|
|
static internal extern bool FreeLibrary (IntPtr hModule);
|
|
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern IntPtr FindResource (IntPtr hModule, string lpName, string lpType);
|
|
|
|
[DllImport("Kernel32.dll", SetLastError = true)]
|
|
static internal extern IntPtr LoadResource (IntPtr hModule, IntPtr hResource);
|
|
|
|
[DllImport("Kernel32.dll", SetLastError = true)]
|
|
static internal extern uint SizeofResource (IntPtr hModule, IntPtr hResource);
|
|
|
|
[DllImport("kernel32.dll")]
|
|
static internal extern IntPtr LockResource (IntPtr hResData);
|
|
|
|
internal delegate bool EnumResTypeProc (IntPtr hModule, IntPtr lpszType, IntPtr lParam);
|
|
internal delegate bool EnumResNameProc (IntPtr hModule, IntPtr lpszType, IntPtr lpszName, IntPtr lParam);
|
|
internal delegate bool EnumResLangProc (IntPtr hModule, IntPtr lpszType, IntPtr lpszName, ushort wIDLanguage, IntPtr lParam);
|
|
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern bool EnumResourceTypes (IntPtr hModule, [MarshalAs(UnmanagedType.FunctionPtr)] EnumResTypeProc lpEnumFunc, IntPtr lParam);
|
|
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern bool EnumResourceNames (IntPtr hModule, IntPtr lpszType, EnumResNameProc lpEnumFunc, IntPtr lParam);
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern bool EnumResourceNames (IntPtr hModule, string lpszType, EnumResNameProc lpEnumFunc, IntPtr lParam);
|
|
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern bool EnumResourceLanguages (IntPtr hModule, IntPtr lpszType, string lpName, EnumResLangProc lpEnumFunc, IntPtr lParam);
|
|
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
|
|
static internal extern bool EnumResourceLanguages (IntPtr hModule, string lpszType, string lpName, EnumResLangProc lpEnumFunc, IntPtr lParam);
|
|
}
|
|
}
|