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index.js
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index.js
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const BufferReader = require('./lib/buffer-reader');
const DATA_TYPES = require('./lib/data-types');
const SZ_WCHAR = DATA_TYPES.SZ_WCHAR;
const FLAGS = require('./lib/flags');
const {VS_VERSIONINFO_structure, StringFileInfo_structure, VarFileInfo_structure, VS_FIXEDFILEINFO_structure} = require('./lib/structures');
/**
* Read binary byte data and collect all the VS_VERSIONINFO strutures found in it, if any.
* If no VS_VSERSIONINFO structures are found in the data, an Error indicating that will be thrown.
*
* @param {Buffer|Blob|Uint8Array} data The binary byte data to parse the VS_VERSIONINFO structure from
* @returns an array of VS_VERSIONINFO_RESULT
* @throws Error when no VS_VERSIONINFO tables can be found, or there is an error during parsing of a found structure
*/
function parseBytes(data) {
const buff = new BufferReader(data);
const VSVersionInfoKey = SZ_WCHAR(VS_VERSIONINFO_structure.szKey.value);
const keyLocations = buff.findOccurences(VSVersionInfoKey);
if (keyLocations.length === 0) {
throw new Error('Did not find VS_VERSION_INFO in provided byte data');
}
const vsVersionInfoTables = [];
for (const location of keyLocations) {
let preceeding_bytes = VS_VERSIONINFO_structure.wLength.type + VS_VERSIONINFO_structure.wValueLength.type + VS_VERSIONINFO_structure.wType.type;
buff.goto(location.start.dec);
buff.rewindBytes(preceeding_bytes);
buff.alignTo32BitBoundary();
const VS_VERSION_INFO = {};
VS_VERSION_INFO['wLength'] = buff.readWord(true);
VS_VERSION_INFO['wValueLength'] = buff.readWord(true);
VS_VERSION_INFO['wType'] = buff.readWord(true);
VS_VERSION_INFO['zsKey'] = buff.readStringZ();
buff.seek32BitBoundary();
VS_VERSION_INFO['Value'] = {};
buff.seekNext(VS_FIXEDFILEINFO_structure.dwSignature.value);
const VS_FIXEDFILEINFO = {};
VS_FIXEDFILEINFO['dwSignature'] = buff.readDWord();
VS_FIXEDFILEINFO['dwStrucVersion'] = [buff.readWord(true), buff.readWord(true)];
VS_FIXEDFILEINFO['dwFileVersionLS'] = buff.readWord(true);
VS_FIXEDFILEINFO['dwFileVersionMS'] = buff.readWord(true);
buff.readDWord();
VS_FIXEDFILEINFO['dwProductVersionLS'] = buff.readWord(true);
VS_FIXEDFILEINFO['dwProductVersionMS'] = buff.readWord(true);
buff.readDWord();
VS_FIXEDFILEINFO['dwFileFlagsMask'] = buff.readDWord(true);
VS_FIXEDFILEINFO['dwFileFlags'] = buff.readDWord(true);
VS_FIXEDFILEINFO['dwFileOS'] = buff.readDWord(true);
VS_FIXEDFILEINFO['dwFileType'] = buff.readDWord(true);
VS_FIXEDFILEINFO['dwFileSubtype'] = buff.readDWord(true);
VS_FIXEDFILEINFO['dwFileDateLS'] = buff.readWord(true);
VS_FIXEDFILEINFO['dwFileDateMS'] = buff.readWord(true);
buff.readDWord();
VS_VERSION_INFO['Value'] = VS_FIXEDFILEINFO;
buff.seek32BitBoundary();
VS_VERSION_INFO['Children'] = {};
const StringFileInfoKey = SZ_WCHAR(StringFileInfo_structure.szKey.value);
if (buff.hasNext(StringFileInfoKey)) {
buff.seekNext(StringFileInfoKey);
buff.rewindBytes(StringFileInfo_structure.wLength.type + StringFileInfo_structure.wValueLength.type + StringFileInfo_structure.wType.type);
const StringFileInfo = {};
StringFileInfo['wLength'] = buff.readWord(true);
StringFileInfo['wValueLength'] = buff.readWord(true);
StringFileInfo['wType'] = buff.readWord(true);
StringFileInfo['szKey'] = buff.readStringZ();
buff.seek32BitBoundary();
StringFileInfo['Children'] = [];
const StringTable = {};
const initial_offset = buff.offset;
StringTable['wLength'] = buff.readWord(true);
StringTable['wValueLength'] = buff.readWord(true);
StringTable['wType'] = buff.readWord(true);
StringTable['szKey'] = buff.readStringZ();
buff.seek32BitBoundary();
StringTable['Children'] = [];
const byteModifier = StringTable['wType'] === 0x00 ? 2 : 1;
while(buff.offset < initial_offset + StringTable['wLength']) {
const StringTableEntry = {};
StringTableEntry['wLength'] = buff.readWord(true);
StringTableEntry['wValueLength'] = buff.readWord(true);
StringTableEntry['wType'] = buff.readWord(true);
StringTableEntry['szKey'] = buff.readStringZ().trim();
buff.seek32BitBoundary();
if (StringTableEntry['wLength'] === 0) {
break;
}
// if wType is 0, value is binary data
if (StringTableEntry['wType'] === 0) {
StringTableEntry['Value'] = StringTableEntry['wValueLength'] > 0 ? buff.readWordsAsString(StringTableEntry['wValueLength']/2).trim() : '';
}
// else if wType is 1, value is text data
else if (StringTableEntry['wType'] === 1) {
StringTableEntry['Value'] = StringTableEntry['wValueLength'] > 0 ? buff.readStringZ().trim() : '';
} else {
throw new Error(`Invalid wType value ${StringTableEntry['wType']} for szKey '${StringTableEntry['szKey']}' in StringTable at offset ${buff.offset.toString(16)}`);
}
buff.seek32BitBoundary();
StringTable['Children'].push(StringTableEntry);
}
StringFileInfo['Children'].push(StringTable);
VS_VERSION_INFO['Children']['StringFileInfo'] = StringFileInfo;
}
const VarFileInfoKey = SZ_WCHAR(VarFileInfo_structure.szKey.value);
if (buff.hasNext(VarFileInfoKey)) {
buff.seekNext(VarFileInfoKey);
buff.rewindBytes(VarFileInfo_structure.wLength.type + VarFileInfo_structure.wValueLength.type + VarFileInfo_structure.wType.type);
const VarFileInfo = {};
const initial_offset = buff.offset;
VarFileInfo['wLength'] = buff.readWord(true);
VarFileInfo['wValueLength'] = buff.readWord(true);
VarFileInfo['wType'] = buff.readWord(true);
VarFileInfo['szKey'] = buff.readStringZ();
buff.seek32BitBoundary();
VarFileInfo['Children'] = [];
while (buff.offset < initial_offset + VarFileInfo['wLength']) {
const VarFileInfoVar = {};
VarFileInfoVar['wLength'] = buff.readWord(true);
VarFileInfoVar['wValueLength'] = buff.readWord(true);
VarFileInfoVar['wType'] = buff.readWord(true);
VarFileInfoVar['szKey'] = buff.readStringZ();
buff.seek32BitBoundary();
VarFileInfoVar['Value'] = [];
// if wType is 0, value is binay data
if (VarFileInfoVar['wType'] === 0) {
for (let i=0; i<VarFileInfoVar['wValueLength']/DATA_TYPES.DWORD; i++) {
VarFileInfoVar['Value'].push(buff.readDWord());
}
}
// else if wType is 1, value is text data
else if (VarFileInfoVar['wType'] === 1) {
VarFileInfoVar['Value'] = VarFileInfoVar['wValueLength'] > 0 ? buff.readStringZ().trim() : '';
}
else {
throw new Error(`Invalid wType value ${StringTableEntry['wType']} for szKey '${StringTableEntry['szKey']}' in VarFileInfo`)
}
VarFileInfo['Children'].push(VarFileInfoVar);
}
VS_VERSION_INFO['Children']['VarFileInfo'] = VarFileInfo;
}
vsVersionInfoTables.push(new VS_VERSIONINFO_RESULT(VS_VERSION_INFO));
}
return vsVersionInfoTables;
}
/**
* A parsed VS_VERSIONINFO structure result container.
*
* @param {VS_VERSIONINFO_structure} data The javascript descriptor object containing the raw parsed data.
*/
function VS_VERSIONINFO_RESULT(data) {
this.data = data;
/**
* Get a formatted VS_VERSIONINFO data object
*
* @returns {object} The formatted javascript object
*/
this.getVsVersionInfo = function() {
const vsVersionInfo = {
FixedFileInfo: this.getFixedFileInfo()
};
const StringFileInfo = this.getStringFileInfo();
if (StringFileInfo != null) {
vsVersionInfo['StringFileInfo'] = StringFileInfo;
}
const VarFileInfo = this.getVarFileInfo();
if (VarFileInfo != null) {
vsVersionInfo['VarFileInfo'] = VarFileInfo;
}
return vsVersionInfo;
}
/**
* Get a formatted VS_FIXEDFILEINFO data object
*
* @returns {object} The formatted javascript object
*/
this.getFixedFileInfo = function() {
const value = this.data.Value;
const fixedFileInfo = {
dwSignature: value.dwSignature,
dwStrucVersion: value.dwStrucVersion,
fileVersionLS: value.dwFileVersionLS,
fileVersionMS: value.dwFileVersionMS,
productVersionLS: value.dwProductVersionLS,
productVersionMS: value.dwProductVersionMS,
fileFlagsMask: value.dwFileFlagsMask,
fileFlags: FLAGS.parseFileFlags(value.dwFileFlags, value.dwFileFlagsMask),
fileOS: FLAGS.parseFileOSFlags(value.dwFileOS),
fileType: FLAGS.parseFileType(value.dwFileType),
fileSubtype: FLAGS.parseFileSubtype(value.dwFileSubtype),
fileDateLS: value.dwFileDateLS,
fileDateMS: value.dwFileDateMS
};
return fixedFileInfo;
}
/**
* Get a formatted StringFileInfo data object
*
* @returns {object} The formatted javascript object
*/
this.getStringFileInfo = function() {
if (typeof this.data.Children.StringFileInfo === 'object') {
const strFileInfo = {};
for (const infoEntry of this.data.Children.StringFileInfo.Children) {
strFileInfo[infoEntry.szKey] = {};
for (const strEntry of infoEntry.Children) {
strFileInfo[infoEntry.szKey][strEntry.szKey] = strEntry.Value;
}
}
return strFileInfo;
} else {
return undefined;
}
}
/**
* Get an array of formatted StringTable objects
*
* @returns {array} An array of the formatted StringTables
*/
this.getStringTables = function() {
const strTables = [];
for (const infoEntry of this.data.Children.StringFileInfo.Children) {
const strKV = {};
for (const strEntry of infoEntry.Children) {
strKV[strEntry.szKey] = strEntry.Value;
}
strTables.push(strKV);
}
return strTables;
}
/**
* Get a formatted VarFileInfo data object
*
* @returns {object} The formatted javascript object
*/
this.getVarFileInfo = function() {
if (typeof this.data.Children.VarFileInfo === 'object') {
const varTable = {};
for (const infoEntry of this.data.Children.VarFileInfo.Children) {
varTable[infoEntry.szKey] = infoEntry.Value;
}
return varTable;
} else {
return undefined;
}
}
}
exports.parseBytes = parseBytes;