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windowspe.js
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windowspe.js
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/** Constants **/
var RESOURCE_ENTRY_TYPES = [
RT_UNKNOWN = {value:0,name:'RT_UNKNOWN'}, RT_CURSOR = {value:1,name:'RT_CURSOR'},
RT_BITMAP = {value:2,name:'RT_BITMAP'}, RT_ICON = {value:3,name:'RT_ICON'},
RT_MENU = {value:4,name:'RT_MENU'}, RT_DIALOG = {value:5,name:'RT_DIALOG'},
RT_STRING = {value:6,name:'RT_STRING'}, RT_FONTDIR = {value:7,name:'RT_FONTDIR'},
RT_FONT = {value:8,name:'RT_FONT'}, RT_ACCELERATOR= {value:9,name:'RT_ACCELERATOR'},
RT_RCDATA = {value:10,position:-1,name:'RT_RCDATA'}, RT_MESSAGETABLE = {value:11,name:'RT_MESSAGETABLE'},
RT_GROUP_CURSOR = {value:12,name:'RT_GROUP_CURSOR'}, RT_UNKNOWN = {value:0,name:'RT_UNKNOWN'},
RT_GROUP_ICON = {value:14,name:'RT_GROUP_ICON'}, RT_UNKNOWN = {value:0,name:'RT_UNKNOWN'},
RT_VERSION = {value:16,name:'RT_VERSION'}, RT_DLGINCLUDE = {value:17,name:'RT_DLGINCLUDE'},
RT_UNKNOWN= {value:0,name:'RT_UNKNOWN'}, RT_PLUGPLAY = {value:19,name:'RT_PLUGPLAY'},
RT_VXD = {value:20,name:'RT_VXD'}, RT_ANICURSOR = {value:21,name:'RT_ANICURSOR'},
RT_ANIICON = {value:22,name:'RT_ANIICON'}, RT_HTML= {value:23,name:'RT_HTML'},
RT_MANIFEST = {value:24,name:'RT_MANIFEST'}
];
var IMAGE_DOS_SIGNATURE = {value:23117, name:'MSDOS'};
var IMAGE_OS2_SIGNATURE = {value:17742, name:'OS2'};
var IMAGE_OS2_SIGNATURE_LE = {value:17740, name:'OS2 LE'};
var IMAGE_NT_SIGNATURE = {value:17744, name:'NT'};
var IMAGE_FILE_MACHINE_I386 = {value:332, name:'i386'};
var IMAGE_FILE_MACHINE_IA64 = {value:512, name:'ia64'};
var IMAGE_FILE_MACHINE_AMD64 = {value:34404, name:'amd64'};
var IMAGE_DIRECTORY_ENTRY_EXPORT = 0; // Export Directory
var IMAGE_DIRECTORY_ENTRY_IMPORT = 1; // Import Directory
var IMAGE_DIRECTORY_ENTRY_RESOURCE = 2; // Resource Directory
var IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3; // Exception Directory
var IMAGE_DIRECTORY_ENTRY_SECURITY = 4; // Security Directory
var IMAGE_DIRECTORY_ENTRY_BASERELOC = 5; // Base Relocation Table
var IMAGE_DIRECTORY_ENTRY_DEBUG = 6; // Debug Directory
var IMAGE_DIRECTORY_ENTRY_COPYRIGHT = 7; // Description String
var IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 8; // Machine Value (MIPS GP)
var IMAGE_DIRECTORY_ENTRY_TLS = 9; // TLS Directory
var IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 10; // Load Configuration Directory
var IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11;
var IMAGE_DIRECTORY_ENTRY_IAT = 12;
var IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 13;
var IMAGE_DIRECTORY_ENTRY_CLR_RUNTIME = 14;
var IMAGE_DIRECTORY_ENTRY_RESERVED = 15;
var IMAGE_SIZEOF_SHORT_NAME = 8;
var IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16;
var SIZE_OF_NT_SIGNATURE = 4;
var WINDOWS_VERSIONS = [
{Name:'Windows 8', MajorOperatingSystemVersion:6, MinorOperatingSystemVersion:2 },
{Name:'Windows 7', MajorOperatingSystemVersion:6, MinorOperatingSystemVersion:1 },
{Name:'Windows Vista', MajorOperatingSystemVersion:6, MinorOperatingSystemVersion:0 },
{Name:'Windows XP 64-Bit Edition', MajorOperatingSystemVersion:5, MinorOperatingSystemVersion:2 },
{Name:'Windows XP', MajorOperatingSystemVersion:5, MinorOperatingSystemVersion:1 },
{Name:'Windows 2000', MajorOperatingSystemVersion:5, MinorOperatingSystemVersion:0 }
];
/** Helper Functions **/
var LOWORD = function(e) { return (e.value & 0x0000ffff); }
var HIGHBIT = function(e) { return (0x80000000 & e) != 0; }
var STRIPHIGHBIT = function(e) { return ((~0x80000000) & e); }
var GETOFFSETBYADDRESS = function(address, winObj) {
for(var i=0; i < winObj.SectionHeaders.length; i++)
{
var VABegin = winObj.SectionHeaders[i].VirtualAddress;
var VAEnd = winObj.SectionHeaders[i].SizeOfRawData + VABegin;
if( VABegin <= address && VAEnd > address )
return address - winObj.SectionHeaders[i].VirtualOffset;
}
return 0;
}
var GETOFFSETBYDIRECTORY = function(directory, winObj) {
return GETOFFSETBYADDRESS(winObj.OptionalHeader.DataDirectory[directory].VirtualAddress, winObj);
}
var READ = function(size, wef) {
var buf = new Buffer(size);
_fs.readSync(wef.FileDescriptor, buf, 0, size, wef.Position);
wef.Increment(size);
return buf;
}
/** Objects and Structures **/
var WindowsExeFile = function(fd)
{
this.name = 'WindowsPEFile';
this.FileDescriptor = fd;
this.Position = 0;
}
WindowsExeFile.prototype.BOOL = function() { return READ(4, this).readUInt32LE(0); }
WindowsExeFile.prototype.BOOLEAN = function() { return READ(1, this).readUInt8(0); }
WindowsExeFile.prototype.BYTE = function() { return READ(1, this).readUInt8(0); };
WindowsExeFile.prototype.UCHAR = function() { return READ(1, this).toString('ascii'); }
WindowsExeFile.prototype.USHORT = function() { return READ(2, this).readUInt16LE(0); }
WindowsExeFile.prototype.LONG = function() { return READ(4, this).readInt32LE(0); }
WindowsExeFile.prototype.ULONG = function() { return READ(4, this).readUInt32LE(0); }
WindowsExeFile.prototype.WCHAR = function() { return READ(2, this).toString('utf8'); }
WindowsExeFile.prototype.DWORD = function() { return READ(4, this).readUInt32LE(0); }
WindowsExeFile.prototype.WORD = function() { return READ(2, this).readUInt16LE(0); }
WindowsExeFile.prototype.Increment = function(e) { return (this.Position = this.Position + e); }
WindowsExeFile.prototype.ResourceDataIconRead = function() {
var obj = {};
obj.biSize = this.DWORD();
obj.biWidth = this.LONG();
obj.biHeight = this.LONG();
obj.biPlanes = this.WORD();
obj.biBitCount = this.WORD();
obj.biCompression = this.DWORD();
obj.biSizeImage = this.DWORD();
obj.biXPelsPerMeter = this.LONG();
obj.biYPelsPerMeter = this.LONG();
obj.biClrUsed = this.DWORD();
obj.biClrImportant = this.DWORD();
obj.Position = this.Position;
obj.getDataPosition = function() { return this.Position; };
obj.getDataSize = function() { return (this.biSizeImage == 0) ? obj.biWidth*(obj.biHeight/2)*(obj.biBitCount/8) : this.biSizeImage; };
return obj;
};
WindowsExeFile.prototype.ResourceDataGroupIconRead = function() {
var obj = {};
obj.wReserved = this.WORD(); // Currently zero
obj.wType = this.WORD(); // 1 for icons
obj.wCount = this.WORD(); // Number of components
obj.Entries = new Array();
for(var i=0; i < obj.wCount; i++) {
var sObj = {};
sObj.bWidth = this.BYTE();
sObj.bHeight = this.BYTE();
sObj.bColorCount = this.BYTE();
sObj.bReserved = this.BYTE();
sObj.wPlanes = this.WORD();
sObj.wBitCount = this.WORD();
sObj.lBytesInRes = this.DWORD();
sObj.wNameOrdinal = this.WORD();
obj.Entries.push(sObj);
}
return obj;
}
WindowsExeFile.prototype.ResourceDataRead = function(p) {
var obj = {}
obj.parent = p;
obj.OffsetToData = this.ULONG();
obj.Size = this.ULONG();
obj.CodePage = this.ULONG();
obj.Reserved = this.ULONG();
obj.PhysicalAddress = GETOFFSETBYADDRESS(obj.OffsetToData, this);
try {
/* Crawl up the chain to get our type and language */
var index = obj.parent.parent.parent.parent.parent.Name;
if(index > RESOURCE_ENTRY_TYPES.length) obj.ResourceType = RT_UNKNOWN;
else obj.ResourceType = RESOURCE_ENTRY_TYPES[index];
var SavePosition = this.Position;
this.Position = obj.PhysicalAddress;
switch(obj.ResourceType.value) {
case RT_ICON.value:
obj.Icon = this.ResourceDataIconRead();
break;
case RT_GROUP_ICON.value:
obj.GroupIcon = this.ResourceDataGroupIconRead();
break;
}
this.Position = SavePosition;
} catch(e) {
obj.ResourceType = RT_UNKNOWN;
obj.ErrorOccured = 'Cannot read resources, an unknown type was encountered.';
}
return obj;
}
WindowsExeFile.prototype.ResourceStringRead = function(p) {
var obj = {};
obj.Length = this.ULONG();
obj.NameString = this.WCHAR();
return obj;
}
WindowsExeFile.prototype.ResourceEntryRead = function(p) {
var obj = {};
obj.parent = p;
obj.Name = this.ULONG();
obj.OffsetToData = this.ULONG();
var SavePosition = this.Position;
this.Position = this.ResourcePosition + STRIPHIGHBIT(obj.OffsetToData);
if(HIGHBIT(obj.OffsetToData)) obj.Directory = this.ResourceDirectoryRead(obj);
else obj.Data = this.ResourceDataRead(obj);
this.Position = SavePosition;
return obj;
}
WindowsExeFile.prototype.ResourceDirectoryRead = function(p) {
var obj = {};
obj.parent = p;
obj.Characteristics = this.ULONG();
obj.TimeDateStamp = new Date(this.ULONG()*1000);
obj.MajorVersion = this.USHORT();
obj.MinorVersion = this.USHORT();
obj.NumberOfNamedEntries = this.USHORT();
obj.NumberOfIdEntries = this.USHORT();
obj.Entries = new Array();
var SavePosition = this.Position;
for(var i=0; i < obj.NumberOfNamedEntries + obj.NumberOfIdEntries; i++)
obj.Entries.push( this.ResourceEntryRead(obj) );
this.Position = SavePosition;
return obj;
}
WindowsExeFile.prototype.SectionHeaderRead = function() {
var obj = {};
obj.Name = ''.concat(
this.UCHAR(), this.UCHAR(), this.UCHAR(), this.UCHAR(),
this.UCHAR(), this.UCHAR(), this.UCHAR(), this.UCHAR()
);
obj.Misc = this.ULONG();
obj.PhysicalAddress = obj.Misc;
obj.VirtualSize = obj.Misc;
obj.VirtualAddress = this.ULONG();
obj.SizeOfRawData = this.ULONG();
obj.PointerToRawData = this.ULONG();
obj.PointerToRelocations = this.ULONG();
obj.PointerToLinenumbers = this.ULONG();
obj.NumberOfRelocations = this.USHORT();
obj.NumberOfLinenumbers = this.USHORT();
obj.Characteristics = this.ULONG();
obj.VirtualOffset = obj.VirtualAddress - obj.PointerToRawData;
return obj;
}
WindowsExeFile.prototype.SectionHeadersRead = function() {
var SectionHeaders = new Array();
for(var i=0; i < this.FileHeader.NumberOfSections; i++)
SectionHeaders.push( this.SectionHeaderRead() );
return SectionHeaders;
}
WindowsExeFile.prototype.DataDirectoryRead = function() {
var obj = {};
obj.VirtualAddress = this.ULONG();
obj.Size = this.ULONG();
return obj;
}
WindowsExeFile.prototype.OptionalHeaderRead = function() {
var obj = {};
obj.Magic = this.USHORT();
obj.MajorLinkerVersion = this.UCHAR();
obj.MinorLinkerVersion = this.UCHAR();
obj.SizeOfCode = this.ULONG();
obj.SizeOfInitializedData = this.ULONG();
obj.SizeOfUninitializedData = this.ULONG();
obj.AddressOfEntryPoint = this.ULONG();
obj.BaseOfCode = this.ULONG();
obj.BaseOfData = this.ULONG();
obj.ImageBase = this.ULONG();
obj.SectionAlignment = this.ULONG();
obj.FileAlignment = this.ULONG();
obj.MajorOperatingSystemVersion = this.USHORT();
obj.MinorOperatingSystemVersion = this.USHORT();
obj.MajorImageVersion = this.USHORT();
obj.MinorImageVersion = this.USHORT();
obj.MajorSubsystemVersion = this.USHORT();
obj.MinorSubsystemVersion = this.USHORT();
obj.Reserved1 = this.ULONG();
obj.SizeOfImage = this.ULONG();
obj.SizeOfHeaders = this.ULONG();
obj.CheckSum = this.ULONG();
obj.Subsystem = this.USHORT();
obj.DllCharacteristics = this.USHORT();
obj.SizeOfStackReserve = this.ULONG();
obj.SizeOfStackCommit = this.ULONG();
obj.SizeOfHeapReserve = this.ULONG();
obj.SizeOfHeapCommit = this.ULONG();
obj.LoaderFlags = this.ULONG();
obj.NumberOfRvaAndSizes = this.ULONG();
obj.DataDirectory = new Array();
for(var i=0; i < WINDOWS_VERSIONS.length; i++)
if(WINDOWS_VERSIONS[i].MajorOperatingSystemVersion == obj.MajorOperatingSystemVersion &&
WINDOWS_VERSIONS[i].MinorOperatingSystemVersion == obj.MinorOperatingSystemVersion )
obj.WindowsVersion = WINDOWS_VERSIONS[i];
for(var i=0; i < IMAGE_NUMBEROF_DIRECTORY_ENTRIES; i++)
obj.DataDirectory.push(this.DataDirectoryRead());
return obj;
}
WindowsExeFile.prototype.FileHeaderRead = function() {
var obj = {}
obj.Machine = this.USHORT();
obj.Machine = (IMAGE_FILE_MACHINE_I386.value == obj.Machine) ? IMAGE_FILE_MACHINE_I386 :
( (IMAGE_FILE_MACHINE_IA64.value == obj.Machine) ? IMAGE_FILE_MACHINE_IA64 : IMAGE_FILE_MACHINE_AMD64 );
obj.NumberOfSections = this.USHORT();
obj.TimeDateStamp = new Date(this.ULONG()*1000);
obj.PointerToSymbolTable = this.ULONG();
obj.NumberOfSymbols = this.ULONG();
obj.SizeOfOptionalHeader = this.USHORT();
obj.Characteristics = this.USHORT();
return obj;
}
WindowsExeFile.prototype.FileTypeRead = function() {
var ImageFileTypeWord = this.DWORD();
// Determine the type of PE executable
if(LOWORD(ImageFileTypeWord) == IMAGE_OS2_SIGNATURE.value) return IMAGE_OS2_SIGNATURE;
else if (LOWORD(ImageFileTypeWord) == IMAGE_OS2_SIGNATURE_LE.value) return IMAGE_OS2_SIGNATURE_LE;
else if (ImageFileTypeWord == IMAGE_NT_SIGNATURE.value) return IMAGE_NT_SIGNATURE;
else if (ImageFileTypeWord == IMAGE_DOS_SIGNATURE.value) return IMAGE_DOS_SIGNATURE;
else return {value:ImageFileTypeWord, name:'UNKNOWN'};
}
WindowsExeFile.prototype.DosHeaderRead = function() {
var obj = {}
obj.e_magic = this.USHORT(); // Magic number
if(obj.e_magic != IMAGE_DOS_SIGNATURE.value)
throw new {name:'NotWindowsPEFile', message:'This does not appear to be a valid Windows PE file.'};
obj.e_cblp = this.USHORT(); // Bytes on last page of file
obj.e_cp = this.USHORT(); // Pages in file
obj.e_crlc = this.USHORT(); // Relocations
obj.e_cparhdr = this.USHORT(); // Size of header in paragraphs
obj.e_minalloc = this.USHORT(); // Minimum extra paragraphs needed
obj.e_maxalloc = this.USHORT(); // Maximum extra paragraphs needed
obj.e_ss = this.USHORT(); // Initial (relative) SS value
obj.e_sp = this.USHORT(); // Initial SP value
obj.e_csum = this.USHORT(); // Checksum
obj.e_ip = this.USHORT(); // Initial IP value
obj.e_cs = this.USHORT(); // Initial (relative) CS value
obj.e_lfarlc = this.USHORT(); // File address of relocation table
obj.e_ovno = this.USHORT(); // Overlay number
obj.e_res = [ this.USHORT(), this.USHORT(), this.USHORT(), this.USHORT() ]; // Reserved words
obj.e_oemid = this.USHORT(); // OEM identifier (for e_oeminfo)
obj.e_oeminfo = this.USHORT(); // OEM information; e_oemid specific
obj.e_res2 = [
this.USHORT(), this.USHORT(), this.USHORT(), this.USHORT(), this.USHORT(),
this.USHORT(), this.USHORT(), this.USHORT(), this.USHORT(), this.USHORT()
]; // Reserved words
obj.e_lfanew = this.LONG(); // File address of new exe header
return obj;
}
WindowsExeFile.prototype.WindowsExeRead = function() {
this.DosHeader = this.DosHeaderRead(); // Read the MSDOS 2 Legacy Header then Jump
this.Position = this.DosHeader.e_lfanew; // Set the position
this.FileType = this.FileTypeRead(); // Read the file type information for NT PE
this.FileHeader = this.FileHeaderRead(); // Read the file headers
this.OptionalHeader = this.OptionalHeaderRead(); // Read the optional headers
this.SectionHeaders = this.SectionHeadersRead(); // Read the section headers
this.ResourcePosition = GETOFFSETBYDIRECTORY(IMAGE_DIRECTORY_ENTRY_RESOURCE, this);
this.Position = this.ResourcePosition;
this.Resources = this.ResourceDirectoryRead(this); // Read resource headers
delete this.ResourcePosition;
}