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[原创]某下载软件asar加密算法
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发表于: 5天前
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Asar is a simple extensive archive format, it works like tar that concatenates all files together without compression, while having random access support.
某下载软件前端也是用的electron开发，但是是加密的。直接上代码:
根据代码看，加密方式还是比较简单的，一个rsa, -个aes-128-ecb且都是标准算法。解密的过程其实在某个dll里，有兴趣的可以找找在哪个dll，找到了会有惊喜。
解密后，提取出的代码如下:
解密后就能对代码进行修改，增加自己需要的功能，然后重新打包。反正就是有了源码几乎可以随便折腾。
本帖所有代码只用于技术交流，请勿用于其他目的。
大佬们有项目需要找人合作的私我，我这边可以提供ios, win, android 软件分析定制服务(有团队），一起发财啊
'use strict';(function () {
const asar = process._linkedBinding('atom_common_asar')
const v8Util = process._linkedBinding('atom_common_v8_util')
const { Buffer } = require('buffer')
const Module = require('module')
const path = require('path')
const util = require('util')
//###################################
const crypto = require('crypto')
//###################################
const Promise = global.Promise
const envNoAsar =
process.env.ELECTRON_NO_ASAR &&
process.type !== 'browser' &&
process.type !== 'renderer'
const isAsarDisabled = () => process.noAsar || envNoAsar
const internalBinding = process.internalBinding
delete process.internalBinding
/**
* @param {!Function} functionToCall
* @param {!Array|undefined} args
*/
const nextTick = (functionToCall, args = []) => {
process.nextTick(() => functionToCall(...args))
}
// Cache asar archive objects.
const cachedArchives = new Map()
const cachedArchiveKeys = {}
const isPrime = (n) => {
if (n < 2) return false
if (n == 2) return true
if (n % 2 == 0) return false
let foo = n / 2
for (let i = 3; i <= foo; i += 2) if (n % i == 0) return false
return true
}
// decrypt header infomation
const decryptHeader = (data) => {
let pubKey = ''
pubKey +=
[
'-',
'-',
'-',
'-',
'-',
'B',
'E',
'G',
'I',
'N',
' ',
'P',
'U',
'B',
'L',
'I',
'C',
' ',
'K',
'E',
'Y',
'-',
'-',
'-',
'-',
'-',
].join('') + '\r\n'
let num = 31
let keylist = []
for (let i = 0; i < 16; num++) {
if (isPrime(num)) {
keylist.push(num)
i++
}
}
let key = Buffer.from(keylist)
let list = [
110, 170, 13, 242, 151, 96, 97, 176, 68, 151, 34, 31, 98, 40, 95, 251,
176, 35, 121, 231, 91, 99, 152, 196, 95, 67, 111, 216, 41, 35, 219, 26,
237, 60, 239, 178, 61, 243, 248, 190, 166, 169, 22, 171, 45, 3, 96, 7, 73,
211, 152, 91, 2, 213, 65, 161, 84, 233, 248, 94, 248, 184, 178, 202, 18,
234, 38, 140, 32, 100, 226, 56, 201, 152, 103, 187, 223, 213, 9, 196, 222,
254, 108, 77, 50, 235, 19, 219, 188, 246, 28, 231, 175, 179, 151, 159,
123, 13, 243, 206, 171, 84, 170, 125, 138, 88, 246, 156, 131, 246, 197,
236, 78, 163, 89, 104, 17, 28, 106, 18, 64, 193, 33, 227, 90, 177, 110,
19, 27, 37, 241, 170, 234, 1, 158, 5, 182, 136, 86, 179, 8, 106, 194, 120,
33, 46, 152, 172, 76, 12, 137, 78, 149, 234, 90, 175, 163, 116, 151, 79,
246, 115, 39, 123, 207, 185, 51, 172, 103, 128, 67, 125, 127, 166, 177,
150, 33, 144, 147, 27, 78, 53, 0, 103, 140, 102, 73, 207, 72, 121, 237,
117, 52, 5, 254, 217, 131, 77, 178, 67, 141, 37, 98, 141, 83, 236, 169, 7,
208, 214, 218, 222, 227, 197, 227, 193, 117, 65, 242, 156, 172, 21, 191,
29, 236, 218, 75, 43, 23, 56, 54, 40, 25, 0, 184, 183, 213, 173, 97, 115,
242, 72, 18, 53, 252, 8, 113, 100, 17, 142, 20, 214, 176, 162, 249, 182,
232, 154, 32, 224, 62, 217, 44, 170, 179, 127, 89, 114, 179, 106, 120, 79,
22, 65, 67, 198, 164, 3, 111, 206, 172, 150, 213, 150, 254, 135, 140, 168,
115, 235, 187, 133, 209, 130, 198, 73, 148, 118, 68, 81, 190, 166, 102,
178, 231, 177, 63, 177, 44, 35, 164, 182, 226, 222, 199, 42, 15, 153, 164,
190, 90, 19, 18, 3, 241, 12, 57, 121, 33, 82, 253, 178, 184, 197, 125,
212, 232, 188, 114, 139, 136, 25, 71, 196, 129, 148, 163, 56, 184, 133,
30, 83, 99, 58, 160, 62, 81, 50, 175, 199, 203, 243, 99, 7, 218, 156, 219,
228, 33, 69, 45, 133, 124, 160, 228, 89, 252, 68, 91, 178, 4, 28, 208, 15,
]
for (let i = 0; i < 6; i++) {
var cipherChunks = []
var decipher = crypto.createDecipheriv(
'aes-128-ecb',
key,
Buffer.from([])
)
decipher.setAutoPadding(false)
cipherChunks.push(
decipher.update(Buffer.from(list.slice(i * 64, (i + 1) * 64)))
)
cipherChunks.push(decipher.final())
let res = Buffer.concat(cipherChunks)
pubKey += res.toString() + '\r\n'
}
pubKey += ['q', 'Q', 'I', 'D', 'A', 'Q', 'A', 'B'].join('') + '\r\n'
pubKey +=
[
'-',
'-',
'-',
'-',
'-',
'E',
'N',
'D',
' ',
'P',
'U',
'B',
'L',
'I',
'C',
' ',
'K',
'E',
'Y',
'-',
'-',
'-',
'-',
'-',
].join('') + '\r\n'
let dec_by_pub = crypto.publicDecrypt(pubKey, data)
return dec_by_pub
}
const getOrCreateArchive = (archivePath) => {
const isCached = cachedArchives.has(archivePath)
if (isCached) {
return cachedArchives.get(archivePath)
}
const newArchive = asar.createArchive(archivePath)
if (!newArchive) return null
cachedArchives.set(archivePath, newArchive)
return newArchive
}
const CAPACITY_READ_ONLY = 9007199254740992 // Largest JS number.
// sizeof(T).
const SIZE_UINT32 = 4
const SIZE_INT32 = 4
// Aligns 'i' by rounding it up to the next multiple of 'alignment'.
const alignInt = function (i, alignment) {
return i + ((alignment - (i % alignment)) % alignment)
}
const PickleIterator = (function () {
function PickleIterator(pickle) {
this.payload = pickle.header
this.payloadOffset = pickle.headerSize
this.readIndex = 0
this.endIndex = pickle.getPayloadSize()
}
PickleIterator.prototype.readUInt32 = function () {
return this.readBytes(SIZE_UINT32, Buffer.prototype.readUInt32LE)
}
PickleIterator.prototype.readInt = function () {
return this.readBytes(SIZE_INT32, Buffer.prototype.readInt32LE)
}
PickleIterator.prototype.readString = function () {
return this.readBytes(this.readInt()).toString()
}
PickleIterator.prototype.readBytes = function (length, method) {
var readPayloadOffset = this.getReadPayloadOffsetAndAdvance(length)
if (method != null) {
return method.call(this.payload, readPayloadOffset, length)
} else {
return this.payload.slice(readPayloadOffset, readPayloadOffset + length)
}
}
PickleIterator.prototype.getReadPayloadOffsetAndAdvance = function (
length
) {
if (length > this.endIndex - this.readIndex) {
this.readIndex = this.endIndex
throw new Error('Failed to read data with length of ' + length)
}
var readPayloadOffset = this.payloadOffset + this.readIndex
this.advance(length)
return readPayloadOffset
}
PickleIterator.prototype.advance = function (size) {
var alignedSize = alignInt(size, SIZE_UINT32)
if (this.endIndex - this.readIndex < alignedSize) {
this.readIndex = this.endIndex
} else {
this.readIndex += alignedSize
}
}
return PickleIterator
})()
// implement a tiny pickle for chromium-pickle-js to read asar header
const tinyPickle = (function () {
function tinyPickle(buffer) {
this.header = buffer
this.headerSize = buffer.length - this.getPayloadSize()
this.capacityAfterHeader = CAPACITY_READ_ONLY
this.writeOffset = 0
if (this.headerSize > buffer.length) {
this.headerSize = 0
}
if (this.headerSize !== alignInt(this.headerSize, SIZE_UINT32)) {
this.headerSize = 0
}
if (this.headerSize === 0) {
this.header = Buffer.alloc(0)
}
}
tinyPickle.prototype.getPayloadSize = function () {
return this.header.readUInt32LE(0)
}
tinyPickle.prototype.createIterator = function () {
return new PickleIterator(this)
}
return tinyPickle
})()
const getOrReadArchiveHeader = (archivePath, fs) => {
if (cachedArchiveKeys[archivePath] !== undefined) {
return cachedArchiveKeys[archivePath]
}
// if (!archivePath.includes('default_app.asar')) {
const fd = cachedArchives.get(archivePath).getFd()
let buffer = Buffer.alloc(8) // for default header size
// prama: handle, buffer, ?, size, offset
fs.readSync(fd, buffer, 0, 8, 0)
const sizePickle = new tinyPickle(buffer)
let nRsaCipherLength = sizePickle.createIterator().readUInt32()
// console.log('### nRsaCipherLength:', nRsaCipherLength);
buffer = Buffer.alloc(nRsaCipherLength)
fs.readSync(fd, buffer, 0, nRsaCipherLength, 8)
// UINT32|string|string
// const rsaHeaderPickle = new tinyPickle(buffer);
// const rsa_encrypted_str = rsaHeaderPickle.createIterator().readString();
// let headerStr = Buffer.toString(); // read header str
let rsaPlaintext = decryptHeader(buffer)
// console.log('### rsaPlaintext length:', rsaPlaintext.length);
let headerPicklePickle = new tinyPickle(rsaPlaintext).createIterator()
let nAesCipherLength = headerPicklePickle.readUInt32()
let headermd5 = headerPicklePickle.readString()
// decrypt header
let aeskey = headerPicklePickle.readString()
// console.log('### rsaPlaintext, nAesCipherLength: ', nAesCipherLength, ' md5:', headermd5, ' aeskey:', aeskey);
let data = Buffer.alloc(nAesCipherLength)
fs.readSync(fd, data, 0, nAesCipherLength, 8 + nRsaCipherLength)
var cipherChunks = []
var decipher = crypto.createDecipheriv(
'aes-128-ecb',
aeskey,
Buffer.from([])
)
decipher.setAutoPadding(false)
cipherChunks.push(decipher.update(data, undefined, 'utf8'))
cipherChunks.push(decipher.final('utf8'))
let header = JSON.parse(cipherChunks.join(''))
// verify header md5
let filesStr = JSON.stringify(header.files)
// console.log('### aes decrypted: ', filesStr);
const hash = crypto.createHash('md5')
hash.update(data)
let filesMd5 = hash.digest('hex')
if (headermd5 !== filesMd5) {
// console.warn('### headermd5: ', headermd5, ' filesmd5: ', filesMd5);
throw createError(AsarError.INVALID_ARCHIVE, { archivePath, archivePath })
}
cachedArchiveKeys[archivePath] = aeskey
return aeskey
// }
// return '';
}
// Separate asar package's path from full path.
const splitPath = (archivePathOrBuffer) => {
// Shortcut for disabled asar.
if (isAsarDisabled()) return { isAsar: false }
// Check for a bad argument type.
let archivePath = archivePathOrBuffer
if (Buffer.isBuffer(archivePathOrBuffer)) {
archivePath = archivePathOrBuffer.toString()
}
if (typeof archivePath !== 'string') return { isAsar: false }
return asar.splitPath(path.normalize(archivePath))
}
// Convert asar archive's Stats object to fs's Stats object.
let nextInode = 0
const uid = process.getuid != null ? process.getuid() : 0
const gid = process.getgid != null ? process.getgid() : 0
const fakeTime = new Date()
const msec = (date) => (date || fakeTime).getTime()
const asarStatsToFsStats = function (stats) {
const { Stats, constants } = require('fs')
let mode =
constants.S_IROTH ^
constants.S_IRGRP ^
constants.S_IRUSR ^
constants.S_IWUSR
if (stats.isFile) {
mode ^= constants.S_IFREG
} else if (stats.isDirectory) {
mode ^= constants.S_IFDIR
} else if (stats.isLink) {
mode ^= constants.S_IFLNK
}
return new Stats(
1, // dev
mode, // mode
1, // nlink
uid,
gid,
0, // rdev
undefined, // blksize
++nextInode, // ino
stats.size,
undefined, // blocks,
msec(stats.atime), // atim_msec
msec(stats.mtime), // mtim_msec
msec(stats.ctime), // ctim_msec
msec(stats.birthtime) // birthtim_msec
)
}
const AsarError = {
NOT_FOUND: 'NOT_FOUND',
NOT_DIR: 'NOT_DIR',
NO_ACCESS: 'NO_ACCESS',
INVALID_ARCHIVE: 'INVALID_ARCHIVE',
}
const createError = (errorType, { asarPath, filePath } = {}) => {
let error
switch (errorType) {
case AsarError.NOT_FOUND:
error = new Error(`ENOENT, ${filePath} not found in ${asarPath}`)
error.code = 'ENOENT'
error.errno = -2
break
case AsarError.NOT_DIR:
error = new Error('ENOTDIR, not a directory')
error.code = 'ENOTDIR'
error.errno = -20
break
case AsarError.NO_ACCESS:
error = new Error(`EACCES: permission denied, access '${filePath}'`)
error.code = 'EACCES'
error.errno = -13
break
case AsarError.INVALID_ARCHIVE:
error = new Error(`Invalid package ${asarPath}`)
break
default:
throw new Error(
`Invalid error type "${errorType}" passed to createError.`
)
}
return error
}
const overrideAPISync = function (
module,
name,
pathArgumentIndex,
fromAsync
) {
if (pathArgumentIndex == null) pathArgumentIndex = 0
const old = module[name]
const func = function () {
const pathArgument = arguments[pathArgumentIndex]
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return old.apply(this, arguments)
const archive = getOrCreateArchive(asarPath)
if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
const newPath = archive.copyFileOut(filePath)
if (!newPath)
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
arguments[pathArgumentIndex] = newPath
return old.apply(this, arguments)
}
if (fromAsync) {
return func
}
module[name] = func
}
const overrideAPI = function (module, name, pathArgumentIndex) {
if (pathArgumentIndex == null) pathArgumentIndex = 0
const old = module[name]
module[name] = function () {
const pathArgument = arguments[pathArgumentIndex]
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return old.apply(this, arguments)
const callback = arguments[arguments.length - 1]
if (typeof callback !== 'function') {
return overrideAPISync(module, name, pathArgumentIndex, true).apply(
this,
arguments
)
}
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const newPath = archive.copyFileOut(filePath)
if (!newPath) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
arguments[pathArgumentIndex] = newPath
return old.apply(this, arguments)
}
if (old[util.promisify.custom]) {
module[name][util.promisify.custom] = makePromiseFunction(
old[util.promisify.custom],
pathArgumentIndex
)
}
if (module.promises && module.promises[name]) {
module.promises[name] = makePromiseFunction(
module.promises[name],
pathArgumentIndex
)
}
}
const makePromiseFunction = function (orig, pathArgumentIndex) {
return function (...args) {
const pathArgument = args[pathArgumentIndex]
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return orig.apply(this, args)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
return Promise.reject(
createError(AsarError.INVALID_ARCHIVE, { asarPath })
)
}
const newPath = archive.copyFileOut(filePath)
if (!newPath) {
return Promise.reject(
createError(AsarError.NOT_FOUND, { asarPath, filePath })
)
}
args[pathArgumentIndex] = newPath
return orig.apply(this, args)
}
}
// Override fs APIs.
exports.wrapFsWithAsar = (fs) => {
const logFDs = {}
const logASARAccess = (asarPath, filePath, offset) => {
if (!process.env.ELECTRON_LOG_ASAR_READS) return
if (!logFDs[asarPath]) {
const path = require('path')
const logFilename = `${path.basename(asarPath, '.asar')}-access-log.txt`
const logPath = path.join(require('os').tmpdir(), logFilename)
logFDs[asarPath] = fs.openSync(logPath, 'a')
}
fs.writeSync(logFDs[asarPath], `${offset}: ${filePath}\n`)
}
const { lstatSync } = fs
fs.lstatSync = (pathArgument, options) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return lstatSync(pathArgument, options)
const archive = getOrCreateArchive(asarPath)
if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
const stats = archive.stat(filePath)
if (!stats) throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
return asarStatsToFsStats(stats)
}
const { lstat } = fs
fs.lstat = function (pathArgument, options, callback) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (typeof options === 'function') {
callback = options
options = {}
}
if (!isAsar) return lstat(pathArgument, options, callback)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const stats = archive.stat(filePath)
if (!stats) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
const fsStats = asarStatsToFsStats(stats)
nextTick(callback, [null, fsStats])
}
fs.promises.lstat = util.promisify(fs.lstat)
const { statSync } = fs
fs.statSync = (pathArgument, options) => {
const { isAsar } = splitPath(pathArgument)
if (!isAsar) return statSync(pathArgument, options)
// Do not distinguish links for now.
return fs.lstatSync(pathArgument, options)
}
const { stat } = fs
fs.stat = (pathArgument, options, callback) => {
const { isAsar } = splitPath(pathArgument)
if (typeof options === 'function') {
callback = options
options = {}
}
if (!isAsar) return stat(pathArgument, options, callback)
// Do not distinguish links for now.
process.nextTick(() => fs.lstat(pathArgument, options, callback))
}
fs.promises.stat = util.promisify(fs.stat)
const wrapRealpathSync = function (realpathSync) {
return function (pathArgument, options) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return realpathSync.apply(this, arguments)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
}
const fileRealPath = archive.realpath(filePath)
if (fileRealPath === false) {
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
}
return path.join(realpathSync(asarPath, options), fileRealPath)
}
}
const { realpathSync } = fs
fs.realpathSync = wrapRealpathSync(realpathSync)
fs.realpathSync.native = wrapRealpathSync(realpathSync.native)
const wrapRealpath = function (realpath) {
return function (pathArgument, options, callback) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return realpath.apply(this, arguments)
if (arguments.length < 3) {
callback = options
options = {}
}
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const fileRealPath = archive.realpath(filePath)
if (fileRealPath === false) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
realpath(asarPath, options, (error, archiveRealPath) => {
if (error === null) {
const fullPath = path.join(archiveRealPath, fileRealPath)
callback(null, fullPath)
} else {
callback(error)
}
})
}
}
const { realpath } = fs
fs.realpath = wrapRealpath(realpath)
fs.realpath.native = wrapRealpath(realpath.native)
fs.promises.realpath = util.promisify(fs.realpath.native)
const { exists } = fs
fs.exists = (pathArgument, callback) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return exists(pathArgument, callback)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const pathExists = archive.stat(filePath) !== false
nextTick(callback, [pathExists])
}
fs.exists[util.promisify.custom] = (pathArgument) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return exists[util.promisify.custom](pathArgument)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
return Promise.reject(error)
}
return Promise.resolve(archive.stat(filePath) !== false)
}
const { existsSync } = fs
fs.existsSync = (pathArgument) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return existsSync(pathArgument)
const archive = getOrCreateArchive(asarPath)
if (!archive) return false
return archive.stat(filePath) !== false
}
const { access } = fs
fs.access = function (pathArgument, mode, callback) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return access.apply(this, arguments)
if (typeof mode === 'function') {
callback = mode
mode = fs.constants.F_OK
}
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const info = archive.getFileInfo(filePath)
if (!info) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
if (info.unpacked) {
const realPath = archive.copyFileOut(filePath)
return fs.access(realPath, mode, callback)
}
const stats = archive.stat(filePath)
if (!stats) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
if (mode & fs.constants.W_OK) {
const error = createError(AsarError.NO_ACCESS, { asarPath, filePath })
nextTick(callback, [error])
return
}
nextTick(callback)
}
fs.promises.access = util.promisify(fs.access)
const { accessSync } = fs
fs.accessSync = function (pathArgument, mode) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return accessSync.apply(this, arguments)
if (mode == null) mode = fs.constants.F_OK
const archive = getOrCreateArchive(asarPath)
if (!archive) {
throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
}
const info = archive.getFileInfo(filePath)
if (!info) {
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
}
if (info.unpacked) {
const realPath = archive.copyFileOut(filePath)
return fs.accessSync(realPath, mode)
}
const stats = archive.stat(filePath)
if (!stats) {
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
}
if (mode & fs.constants.W_OK) {
throw createError(AsarError.NO_ACCESS, { asarPath, filePath })
}
}
function decryption(data, asarPath) {
let key = getOrReadArchiveHeader(asarPath, fs)
// console.warn('#### begin decrypt, key: ', key);
if (!key) {
return data
}
if (typeof data === 'string') {
data = Buffer.from(data)
}
var cipherChunks = []
var decipher = crypto.createDecipheriv(
'aes-128-ecb',
key,
Buffer.from([])
)
decipher.setAutoPadding(false)
cipherChunks.push(decipher.update(data))
cipherChunks.push(decipher.final())
return Buffer.concat(cipherChunks)
}
const { readFile } = fs
fs.readFile = function (pathArgument, options, callback) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return readFile.apply(this, arguments)
if (typeof options === 'function') {
callback = options
options = { encoding: null }
} else if (typeof options === 'string') {
options = { encoding: options }
} else if (options === null || options === undefined) {
options = { encoding: null }
} else if (typeof options !== 'object') {
throw new TypeError('Bad arguments')
}
const { encoding } = options
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const info = archive.getFileInfo(filePath)
if (!info) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
if (info.size === 0) {
nextTick(callback, [null, encoding ? '' : Buffer.alloc(0)])
return
}
if (info.unpacked) {
const realPath = archive.copyFileOut(filePath)
return fs.readFile(realPath, options, callback)
}
const buffer = Buffer.alloc(info.size)
const fd = archive.getFd()
if (!(fd >= 0)) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
logASARAccess(asarPath, filePath, info.offset)
fs.read(fd, buffer, 0, info.size, info.offset, (error) => {
// #####################
// buffer
// console.warn('### asar.js: fs.read, path: ', filePath, ' size:', info.size, ' offset: ', info.offset);
let result = buffer
if (info.encrypted) {
result = decryption(result, asarPath)
// console.warn('### asar.js: fs.read', result.toString().slice(0, 10));
}
// #####################
callback(error, encoding ? result.toString(encoding) : result)
})
}
fs.promises.readFile = util.promisify(fs.readFile)
const { readFileSync } = fs
fs.readFileSync = function (pathArgument, options) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return readFileSync.apply(this, arguments)
const archive = getOrCreateArchive(asarPath)
if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
const info = archive.getFileInfo(filePath)
if (!info) throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
if (info.size === 0) return options ? '' : Buffer.alloc(0)
if (info.unpacked) {
const realPath = archive.copyFileOut(filePath)
return fs.readFileSync(realPath, options)
}
if (!options) {
options = { encoding: null }
} else if (typeof options === 'string') {
options = { encoding: options }
} else if (typeof options !== 'object') {
throw new TypeError('Bad arguments')
}
const { encoding } = options
const buffer = Buffer.alloc(info.size)
const fd = archive.getFd()
if (!(fd >= 0))
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
logASARAccess(asarPath, filePath, info.offset)
fs.readSync(fd, buffer, 0, info.size, info.offset)
// #####################
// buffer
// console.warn('### asar.js: fs.readSync, path: ', filePath, ' size:', info.size, ' offset: ', info.offset);
let header = archive.path
let result = buffer
if (info.encrypted) {
result = decryption(buffer, asarPath)
// console.warn('### asar.js: fs.readSync result', result.toString().slice(0, 10));
}
// #####################
return encoding ? result.toString(encoding) : result
}
const { readdir } = fs
fs.readdir = function (pathArgument, options = {}, callback) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (typeof options === 'function') {
callback = options
options = {}
}
if (!isAsar) return readdir.apply(this, arguments)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const files = archive.readdir(filePath)
if (!files) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
if (options.withFileTypes) {
const dirents = []
for (const file of files) {
const stats = archive.stat(file)
if (stats.isFile) {
dirents.push(new fs.Dirent(file, fs.constants.UV_DIRENT_FILE))
} else if (stats.isDirectory) {
dirents.push(new fs.Dirent(file, fs.constants.UV_DIRENT_DIR))
} else if (stats.isLink) {
dirents.push(new fs.Dirent(file, fs.constants.UV_DIRENT_LINK))
}
}
nextTick(callback, [null, dirents])
return
}
nextTick(callback, [null, files])
}
fs.promises.readdir = util.promisify(fs.readdir)
const { readdirSync } = fs
fs.readdirSync = function (pathArgument, options = {}) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return readdirSync.apply(this, arguments)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
}
const files = archive.readdir(filePath)
if (!files) {
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
}
if (options.withFileTypes) {
const dirents = []
for (const file of files) {
const stats = archive.stat(file)
if (stats.isFile) {
dirents.push(new fs.Dirent(file, fs.constants.UV_DIRENT_FILE))
} else if (stats.isDirectory) {
dirents.push(new fs.Dirent(file, fs.constants.UV_DIRENT_DIR))
} else if (stats.isLink) {
dirents.push(new fs.Dirent(file, fs.constants.UV_DIRENT_LINK))
}
}
return dirents
}
return files
}
const { internalModuleReadJSON } = internalBinding('fs')
internalBinding('fs').internalModuleReadJSON = (pathArgument) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return internalModuleReadJSON(pathArgument)
const archive = getOrCreateArchive(asarPath)
if (!archive) return
const info = archive.getFileInfo(filePath)
if (!info) return
if (info.size === 0) return ''
if (info.unpacked) {
const realPath = archive.copyFileOut(filePath)
return fs.readFileSync(realPath, { encoding: 'utf8' })
}
const buffer = Buffer.alloc(info.size)
const fd = archive.getFd()
if (!(fd >= 0)) return
logASARAccess(asarPath, filePath, info.offset)
fs.readSync(fd, buffer, 0, info.size, info.offset)
return buffer.toString('utf8')
}
const { internalModuleStat } = internalBinding('fs')
internalBinding('fs').internalModuleStat = (pathArgument) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return internalModuleStat(pathArgument)
// -ENOENT
const archive = getOrCreateArchive(asarPath)
if (!archive) return -34
// -ENOENT
const stats = archive.stat(filePath)
if (!stats) return -34
return stats.isDirectory ? 1 : 0
}
// Calling mkdir for directory inside asar archive should throw ENOTDIR
// error, but on Windows it throws ENOENT.
if (process.platform === 'win32') {
const { mkdir } = fs
fs.mkdir = (pathArgument, options, callback) => {
if (typeof options === 'function') {
callback = options
options = {}
}
const { isAsar, filePath } = splitPath(pathArgument)
if (isAsar && filePath.length > 0) {
const error = createError(AsarError.NOT_DIR)
nextTick(callback, [error])
return
}
mkdir(pathArgument, options, callback)
}
fs.promises.mkdir = util.promisify(fs.mkdir)
const { mkdirSync } = fs
fs.mkdirSync = function (pathArgument, options) {
const { isAsar, filePath } = splitPath(pathArgument)
if (isAsar && filePath.length) throw createError(AsarError.NOT_DIR)
return mkdirSync(pathArgument, options)
}
}
function invokeWithNoAsar(func) {
return function () {
const processNoAsarOriginalValue = process.noAsar
process.noAsar = true
try {
return func.apply(this, arguments)
} finally {
process.noAsar = processNoAsarOriginalValue
}
}
}
// Strictly implementing the flags of fs.copyFile is hard, just do a simple
// implementation for now. Doing 2 copies won't spend much time more as OS
// has filesystem caching.
overrideAPI(fs, 'copyFile')
overrideAPISync(fs, 'copyFileSync')
overrideAPI(fs, 'open')
overrideAPISync(process, 'dlopen', 1)
overrideAPISync(Module._extensions, '.node', 1)
overrideAPISync(fs, 'openSync')
const overrideChildProcess = (childProcess) => {
// Executing a command string containing a path to an asar archive
// confuses `childProcess.execFile`, which is internally called by
// `childProcess.{exec,execSync}`, causing Electron to consider the full
// command as a single path to an archive.
const { exec, execSync } = childProcess
childProcess.exec = invokeWithNoAsar(exec)
childProcess.exec[util.promisify.custom] = invokeWithNoAsar(
exec[util.promisify.custom]
)
childProcess.execSync = invokeWithNoAsar(execSync)
overrideAPI(childProcess, 'execFile')
overrideAPISync(childProcess, 'execFileSync')
}
// Lazily override the child_process APIs only when child_process is
// fetched the first time. We will eagerly override the child_process APIs
// when this env var is set so that stack traces generated inside node unit
// tests will match. This env var will only slow things down in users apps
// and should not be used.
if (process.env.ELECTRON_EAGER_ASAR_HOOK_FOR_TESTING) {
overrideChildProcess(require('child_process'))
} else {
const originalModuleLoad = Module._load
Module._load = (request, ...args) => {
const loadResult = originalModuleLoad(request, ...args)
if (request === 'child_process') {
if (!v8Util.getHiddenValue(loadResult, 'asar-ready')) {
v8Util.setHiddenValue(loadResult, 'asar-ready', true)
// Just to make it obvious what we are dealing with here
const childProcess = loadResult
overrideChildProcess(childProcess)
}
}
return loadResult
}
}
}
})()'use strict';(function () {
const asar = process._linkedBinding('atom_common_asar')
const v8Util = process._linkedBinding('atom_common_v8_util')
const { Buffer } = require('buffer')
const Module = require('module')
const path = require('path')
const util = require('util')
//###################################
const crypto = require('crypto')
//###################################
const Promise = global.Promise
const envNoAsar =
process.env.ELECTRON_NO_ASAR &&
process.type !== 'browser' &&
process.type !== 'renderer'
const isAsarDisabled = () => process.noAsar || envNoAsar
const internalBinding = process.internalBinding
delete process.internalBinding
/**
* @param {!Function} functionToCall
* @param {!Array|undefined} args
*/
const nextTick = (functionToCall, args = []) => {
process.nextTick(() => functionToCall(...args))
}
// Cache asar archive objects.
const cachedArchives = new Map()
const cachedArchiveKeys = {}
const isPrime = (n) => {
if (n < 2) return false
if (n == 2) return true
if (n % 2 == 0) return false
let foo = n / 2
for (let i = 3; i <= foo; i += 2) if (n % i == 0) return false
return true
}
// decrypt header infomation
const decryptHeader = (data) => {
let pubKey = ''
pubKey +=
[
'-',
'-',
'-',
'-',
'-',
'B',
'E',
'G',
'I',
'N',
' ',
'P',
'U',
'B',
'L',
'I',
'C',
' ',
'K',
'E',
'Y',
'-',
'-',
'-',
'-',
'-',
].join('') + '\r\n'
let num = 31
let keylist = []
for (let i = 0; i < 16; num++) {
if (isPrime(num)) {
keylist.push(num)
i++
}
}
let key = Buffer.from(keylist)
let list = [
110, 170, 13, 242, 151, 96, 97, 176, 68, 151, 34, 31, 98, 40, 95, 251,
176, 35, 121, 231, 91, 99, 152, 196, 95, 67, 111, 216, 41, 35, 219, 26,
237, 60, 239, 178, 61, 243, 248, 190, 166, 169, 22, 171, 45, 3, 96, 7, 73,
211, 152, 91, 2, 213, 65, 161, 84, 233, 248, 94, 248, 184, 178, 202, 18,
234, 38, 140, 32, 100, 226, 56, 201, 152, 103, 187, 223, 213, 9, 196, 222,
254, 108, 77, 50, 235, 19, 219, 188, 246, 28, 231, 175, 179, 151, 159,
123, 13, 243, 206, 171, 84, 170, 125, 138, 88, 246, 156, 131, 246, 197,
236, 78, 163, 89, 104, 17, 28, 106, 18, 64, 193, 33, 227, 90, 177, 110,
19, 27, 37, 241, 170, 234, 1, 158, 5, 182, 136, 86, 179, 8, 106, 194, 120,
33, 46, 152, 172, 76, 12, 137, 78, 149, 234, 90, 175, 163, 116, 151, 79,
246, 115, 39, 123, 207, 185, 51, 172, 103, 128, 67, 125, 127, 166, 177,
150, 33, 144, 147, 27, 78, 53, 0, 103, 140, 102, 73, 207, 72, 121, 237,
117, 52, 5, 254, 217, 131, 77, 178, 67, 141, 37, 98, 141, 83, 236, 169, 7,
208, 214, 218, 222, 227, 197, 227, 193, 117, 65, 242, 156, 172, 21, 191,
29, 236, 218, 75, 43, 23, 56, 54, 40, 25, 0, 184, 183, 213, 173, 97, 115,
242, 72, 18, 53, 252, 8, 113, 100, 17, 142, 20, 214, 176, 162, 249, 182,
232, 154, 32, 224, 62, 217, 44, 170, 179, 127, 89, 114, 179, 106, 120, 79,
22, 65, 67, 198, 164, 3, 111, 206, 172, 150, 213, 150, 254, 135, 140, 168,
115, 235, 187, 133, 209, 130, 198, 73, 148, 118, 68, 81, 190, 166, 102,
178, 231, 177, 63, 177, 44, 35, 164, 182, 226, 222, 199, 42, 15, 153, 164,
190, 90, 19, 18, 3, 241, 12, 57, 121, 33, 82, 253, 178, 184, 197, 125,
212, 232, 188, 114, 139, 136, 25, 71, 196, 129, 148, 163, 56, 184, 133,
30, 83, 99, 58, 160, 62, 81, 50, 175, 199, 203, 243, 99, 7, 218, 156, 219,
228, 33, 69, 45, 133, 124, 160, 228, 89, 252, 68, 91, 178, 4, 28, 208, 15,
]
for (let i = 0; i < 6; i++) {
var cipherChunks = []
var decipher = crypto.createDecipheriv(
'aes-128-ecb',
key,
Buffer.from([])
)
decipher.setAutoPadding(false)
cipherChunks.push(
decipher.update(Buffer.from(list.slice(i * 64, (i + 1) * 64)))
)
cipherChunks.push(decipher.final())
let res = Buffer.concat(cipherChunks)
pubKey += res.toString() + '\r\n'
}
pubKey += ['q', 'Q', 'I', 'D', 'A', 'Q', 'A', 'B'].join('') + '\r\n'
pubKey +=
[
'-',
'-',
'-',
'-',
'-',
'E',
'N',
'D',
' ',
'P',
'U',
'B',
'L',
'I',
'C',
' ',
'K',
'E',
'Y',
'-',
'-',
'-',
'-',
'-',
].join('') + '\r\n'
let dec_by_pub = crypto.publicDecrypt(pubKey, data)
return dec_by_pub
}
const getOrCreateArchive = (archivePath) => {
const isCached = cachedArchives.has(archivePath)
if (isCached) {
return cachedArchives.get(archivePath)
}
const newArchive = asar.createArchive(archivePath)
if (!newArchive) return null
cachedArchives.set(archivePath, newArchive)
return newArchive
}
const CAPACITY_READ_ONLY = 9007199254740992 // Largest JS number.
// sizeof(T).
const SIZE_UINT32 = 4
const SIZE_INT32 = 4
// Aligns 'i' by rounding it up to the next multiple of 'alignment'.
const alignInt = function (i, alignment) {
return i + ((alignment - (i % alignment)) % alignment)
}
const PickleIterator = (function () {
function PickleIterator(pickle) {
this.payload = pickle.header
this.payloadOffset = pickle.headerSize
this.readIndex = 0
this.endIndex = pickle.getPayloadSize()
}
PickleIterator.prototype.readUInt32 = function () {
return this.readBytes(SIZE_UINT32, Buffer.prototype.readUInt32LE)
}
PickleIterator.prototype.readInt = function () {
return this.readBytes(SIZE_INT32, Buffer.prototype.readInt32LE)
}
PickleIterator.prototype.readString = function () {
return this.readBytes(this.readInt()).toString()
}
PickleIterator.prototype.readBytes = function (length, method) {
var readPayloadOffset = this.getReadPayloadOffsetAndAdvance(length)
if (method != null) {
return method.call(this.payload, readPayloadOffset, length)
} else {
return this.payload.slice(readPayloadOffset, readPayloadOffset + length)
}
}
PickleIterator.prototype.getReadPayloadOffsetAndAdvance = function (
length
) {
if (length > this.endIndex - this.readIndex) {
this.readIndex = this.endIndex
throw new Error('Failed to read data with length of ' + length)
}
var readPayloadOffset = this.payloadOffset + this.readIndex
this.advance(length)
return readPayloadOffset
}
PickleIterator.prototype.advance = function (size) {
var alignedSize = alignInt(size, SIZE_UINT32)
if (this.endIndex - this.readIndex < alignedSize) {
this.readIndex = this.endIndex
} else {
this.readIndex += alignedSize
}
}
return PickleIterator
})()
// implement a tiny pickle for chromium-pickle-js to read asar header
const tinyPickle = (function () {
function tinyPickle(buffer) {
this.header = buffer
this.headerSize = buffer.length - this.getPayloadSize()
this.capacityAfterHeader = CAPACITY_READ_ONLY
this.writeOffset = 0
if (this.headerSize > buffer.length) {
this.headerSize = 0
}
if (this.headerSize !== alignInt(this.headerSize, SIZE_UINT32)) {
this.headerSize = 0
}
if (this.headerSize === 0) {
this.header = Buffer.alloc(0)
}
}
tinyPickle.prototype.getPayloadSize = function () {
return this.header.readUInt32LE(0)
}
tinyPickle.prototype.createIterator = function () {
return new PickleIterator(this)
}
return tinyPickle
})()
const getOrReadArchiveHeader = (archivePath, fs) => {
if (cachedArchiveKeys[archivePath] !== undefined) {
return cachedArchiveKeys[archivePath]
}
// if (!archivePath.includes('default_app.asar')) {
const fd = cachedArchives.get(archivePath).getFd()
let buffer = Buffer.alloc(8) // for default header size
// prama: handle, buffer, ?, size, offset
fs.readSync(fd, buffer, 0, 8, 0)
const sizePickle = new tinyPickle(buffer)
let nRsaCipherLength = sizePickle.createIterator().readUInt32()
// console.log('### nRsaCipherLength:', nRsaCipherLength);
buffer = Buffer.alloc(nRsaCipherLength)
fs.readSync(fd, buffer, 0, nRsaCipherLength, 8)
// UINT32|string|string
// const rsaHeaderPickle = new tinyPickle(buffer);
// const rsa_encrypted_str = rsaHeaderPickle.createIterator().readString();
// let headerStr = Buffer.toString(); // read header str
let rsaPlaintext = decryptHeader(buffer)
// console.log('### rsaPlaintext length:', rsaPlaintext.length);
let headerPicklePickle = new tinyPickle(rsaPlaintext).createIterator()
let nAesCipherLength = headerPicklePickle.readUInt32()
let headermd5 = headerPicklePickle.readString()
// decrypt header
let aeskey = headerPicklePickle.readString()
// console.log('### rsaPlaintext, nAesCipherLength: ', nAesCipherLength, ' md5:', headermd5, ' aeskey:', aeskey);
let data = Buffer.alloc(nAesCipherLength)
fs.readSync(fd, data, 0, nAesCipherLength, 8 + nRsaCipherLength)
var cipherChunks = []
var decipher = crypto.createDecipheriv(
'aes-128-ecb',
aeskey,
Buffer.from([])
)
decipher.setAutoPadding(false)
cipherChunks.push(decipher.update(data, undefined, 'utf8'))
cipherChunks.push(decipher.final('utf8'))
let header = JSON.parse(cipherChunks.join(''))
// verify header md5
let filesStr = JSON.stringify(header.files)
// console.log('### aes decrypted: ', filesStr);
const hash = crypto.createHash('md5')
hash.update(data)
let filesMd5 = hash.digest('hex')
if (headermd5 !== filesMd5) {
// console.warn('### headermd5: ', headermd5, ' filesmd5: ', filesMd5);
throw createError(AsarError.INVALID_ARCHIVE, { archivePath, archivePath })
}
cachedArchiveKeys[archivePath] = aeskey
return aeskey
// }
// return '';
}
// Separate asar package's path from full path.
const splitPath = (archivePathOrBuffer) => {
// Shortcut for disabled asar.
if (isAsarDisabled()) return { isAsar: false }
// Check for a bad argument type.
let archivePath = archivePathOrBuffer
if (Buffer.isBuffer(archivePathOrBuffer)) {
archivePath = archivePathOrBuffer.toString()
}
if (typeof archivePath !== 'string') return { isAsar: false }
return asar.splitPath(path.normalize(archivePath))
}
// Convert asar archive's Stats object to fs's Stats object.
let nextInode = 0
const uid = process.getuid != null ? process.getuid() : 0
const gid = process.getgid != null ? process.getgid() : 0
const fakeTime = new Date()
const msec = (date) => (date || fakeTime).getTime()
const asarStatsToFsStats = function (stats) {
const { Stats, constants } = require('fs')
let mode =
constants.S_IROTH ^
constants.S_IRGRP ^
constants.S_IRUSR ^
constants.S_IWUSR
if (stats.isFile) {
mode ^= constants.S_IFREG
} else if (stats.isDirectory) {
mode ^= constants.S_IFDIR
} else if (stats.isLink) {
mode ^= constants.S_IFLNK
}
return new Stats(
1, // dev
mode, // mode
1, // nlink
uid,
gid,
0, // rdev
undefined, // blksize
++nextInode, // ino
stats.size,
undefined, // blocks,
msec(stats.atime), // atim_msec
msec(stats.mtime), // mtim_msec
msec(stats.ctime), // ctim_msec
msec(stats.birthtime) // birthtim_msec
)
}
const AsarError = {
NOT_FOUND: 'NOT_FOUND',
NOT_DIR: 'NOT_DIR',
NO_ACCESS: 'NO_ACCESS',
INVALID_ARCHIVE: 'INVALID_ARCHIVE',
}
const createError = (errorType, { asarPath, filePath } = {}) => {
let error
switch (errorType) {
case AsarError.NOT_FOUND:
error = new Error(`ENOENT, ${filePath} not found in ${asarPath}`)
error.code = 'ENOENT'
error.errno = -2
break
case AsarError.NOT_DIR:
error = new Error('ENOTDIR, not a directory')
error.code = 'ENOTDIR'
error.errno = -20
break
case AsarError.NO_ACCESS:
error = new Error(`EACCES: permission denied, access '${filePath}'`)
error.code = 'EACCES'
error.errno = -13
break
case AsarError.INVALID_ARCHIVE:
error = new Error(`Invalid package ${asarPath}`)
break
default:
throw new Error(
`Invalid error type "${errorType}" passed to createError.`
)
}
return error
}
const overrideAPISync = function (
module,
name,
pathArgumentIndex,
fromAsync
) {
if (pathArgumentIndex == null) pathArgumentIndex = 0
const old = module[name]
const func = function () {
const pathArgument = arguments[pathArgumentIndex]
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return old.apply(this, arguments)
const archive = getOrCreateArchive(asarPath)
if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
const newPath = archive.copyFileOut(filePath)
if (!newPath)
throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
arguments[pathArgumentIndex] = newPath
return old.apply(this, arguments)
}
if (fromAsync) {
return func
}
module[name] = func
}
const overrideAPI = function (module, name, pathArgumentIndex) {
if (pathArgumentIndex == null) pathArgumentIndex = 0
const old = module[name]
module[name] = function () {
const pathArgument = arguments[pathArgumentIndex]
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return old.apply(this, arguments)
const callback = arguments[arguments.length - 1]
if (typeof callback !== 'function') {
return overrideAPISync(module, name, pathArgumentIndex, true).apply(
this,
arguments
)
}
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
const newPath = archive.copyFileOut(filePath)
if (!newPath) {
const error = createError(AsarError.NOT_FOUND, { asarPath, filePath })
nextTick(callback, [error])
return
}
arguments[pathArgumentIndex] = newPath
return old.apply(this, arguments)
}
if (old[util.promisify.custom]) {
module[name][util.promisify.custom] = makePromiseFunction(
old[util.promisify.custom],
pathArgumentIndex
)
}
if (module.promises && module.promises[name]) {
module.promises[name] = makePromiseFunction(
module.promises[name],
pathArgumentIndex
)
}
}
const makePromiseFunction = function (orig, pathArgumentIndex) {
return function (...args) {
const pathArgument = args[pathArgumentIndex]
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return orig.apply(this, args)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
return Promise.reject(
createError(AsarError.INVALID_ARCHIVE, { asarPath })
)
}
const newPath = archive.copyFileOut(filePath)
if (!newPath) {
return Promise.reject(
createError(AsarError.NOT_FOUND, { asarPath, filePath })
)
}
args[pathArgumentIndex] = newPath
return orig.apply(this, args)
}
}
// Override fs APIs.
exports.wrapFsWithAsar = (fs) => {
const logFDs = {}
const logASARAccess = (asarPath, filePath, offset) => {
if (!process.env.ELECTRON_LOG_ASAR_READS) return
if (!logFDs[asarPath]) {
const path = require('path')
const logFilename = `${path.basename(asarPath, '.asar')}-access-log.txt`
const logPath = path.join(require('os').tmpdir(), logFilename)
logFDs[asarPath] = fs.openSync(logPath, 'a')
}
fs.writeSync(logFDs[asarPath], `${offset}: ${filePath}\n`)
}
const { lstatSync } = fs
fs.lstatSync = (pathArgument, options) => {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (!isAsar) return lstatSync(pathArgument, options)
const archive = getOrCreateArchive(asarPath)
if (!archive) throw createError(AsarError.INVALID_ARCHIVE, { asarPath })
const stats = archive.stat(filePath)
if (!stats) throw createError(AsarError.NOT_FOUND, { asarPath, filePath })
return asarStatsToFsStats(stats)
}
const { lstat } = fs
fs.lstat = function (pathArgument, options, callback) {
const { isAsar, asarPath, filePath } = splitPath(pathArgument)
if (typeof options === 'function') {
callback = options
options = {}
}
if (!isAsar) return lstat(pathArgument, options, callback)
const archive = getOrCreateArchive(asarPath)
if (!archive) {
const error = createError(AsarError.INVALID_ARCHIVE, { asarPath })
nextTick(callback, [error])
return
}
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