refactor encryption (support linux api)

app.js

-const express = require('express')
-const apicache = require('apicache')
-const path = require('path')
 const fs = require('fs')
-const app = express()
-let cache = apicache.middleware
-const { exec } = require('child_process');
-exec('npm info NeteaseCloudMusicApi version', (err, stdout, stderr) => {
-  if (err) {
-    console.error(err);
-    return;
-  }
-  const onlinePackageVersion = stdout.trim();
-  const package = require('./package.json')
-  if (package.version < onlinePackageVersion) {
-    console.log(
-      '最新版:Version:' +
-      onlinePackageVersion +
-        ',当前版本:' +
-        package.version +
-        ',请及时更新'
-    )
-  }
-})
+const path = require('path')
+const express = require('express')
+const request = require('./util/request')
+const package = require('./package.json')
+const exec = require('child_process').exec
+const cache = require('apicache').middleware
 
-// 跨域设置
-app.all('*', function(req, res, next) {
-  if (req.path !== '/' && !req.path.includes('.')) {
-    res.header('Access-Control-Allow-Credentials', true)
-    // 这里获取 origin 请求头 而不是用 *
-    res.header('Access-Control-Allow-Origin', req.headers['origin'] || '*')
-    res.header('Access-Control-Allow-Headers', 'X-Requested-With')
-    res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS')
-    res.header('Content-Type', 'application/json;charset=utf-8')
-  }
-  next()
+// version check
+exec('npm info NeteaseCloudMusicApi version', (err, stdout, stderr) => {
+    if(!err){
+        let version = stdout.trim()
+        if(package.version < version){
+            console.log(`最新版本: ${version}, 当前版本: ${package.version}, 请及时更新`)
+        }
+    }
 })
 
-const onlyStatus200 = (req, res) => res.statusCode === 200
-
-app.use(cache('2 minutes', onlyStatus200))
-
-app.use(express.static(path.resolve(__dirname, 'public')))
+const app = express()
 
-// 补全缺失的cookie
-const { completeCookie } = require('./util/init')
-app.use(function(req, res, next) {
-  let cookie = completeCookie(req.headers.cookie)
-  req.headers.cookie = cookie.map(x => x[0]).concat(req.headers.cookie || []).join('; ')
-  res.append('Set-Cookie', cookie.map(x => (x.concat('Path=/').join('; '))))
-  next()
+// CORS
+app.use(function(req, res, next){
+    if(req.path !== '/' && !req.path.includes('.')){
+        res.header({
+            'Access-Control-Allow-Credentials': true,
+            'Access-Control-Allow-Origin': req.headers.origin || '*',
+            'Access-Control-Allow-Headers': 'X-Requested-With',
+            'Access-Control-Allow-Methods': 'PUT,POST,GET,DELETE,OPTIONS',
+            'Content-Type': 'application/json; charset=utf-8'
+        })
+    }
+    next()
 })
 
 // cookie parser
-app.use(function(req, res, next) {
-  req.cookies = {}, (req.headers.cookie || '').split(/\s*;\s*/).forEach(pair => {
-    let crack = pair.indexOf('=')
-    if(crack < 1 || crack == pair.length - 1) return
-    req.cookies[decodeURIComponent(pair.slice(0, crack)).trim()] = decodeURIComponent(pair.slice(crack + 1)).trim()
-  })
-  next()
+app.use(function(req, res, next){
+    req.cookies = {}, (req.headers.cookie || '').split(/\s*;\s*/).forEach(pair => {
+        let crack = pair.indexOf('=')
+        if(crack < 1 || crack == pair.length - 1) return
+        req.cookies[decodeURIComponent(pair.slice(0, crack)).trim()] = decodeURIComponent(pair.slice(crack + 1)).trim()
+    })
+    next()
 })
 
-app.use(function(req, res, next) {
-  const proxy = req.query.proxy
-  if (proxy) {
-    req.headers.cookie += `__proxy__${proxy}`
-  }
-  next()
-})
+// cache
+app.use(cache('2 minutes', ((req, res) => res.statusCode === 200)))
 
-// 因为这几个文件对外所注册的路由 和 其他文件对外注册的路由规则不一样, 所以专门写个MAP对这些文件做特殊处理
-const UnusualRouteFileMap = {
-  // key 为文件名, value 为对外注册的路由
-  'daily_signin.js': '/daily_signin',
-  'fm_trash.js': '/fm_trash',
-  'personal_fm.js': '/personal_fm'
-}
+// static
+app.use(express.static(path.join(__dirname, 'public')))
 
+// router
+const special = {
+    'daily_signin.js': '/daily_signin',
+    'fm_trash.js': '/fm_trash',
+    'personal_fm.js': '/personal_fm'
+}
 
-// 改写router为module
-const requestMod = require('./util/request')
-let dev = express()
-fs.readdirSync(path.join(__dirname, 'module'))
-.reverse()
-.forEach(file => {
-  if (!(/\.js$/i.test(file))) return
-  let route = (file in UnusualRouteFileMap) ?  UnusualRouteFileMap[file] : '/' + file.replace(/\.js$/i, '').replace(/_/g, '/')
-  let question = require(path.join(__dirname, 'module', file))
-  
-  dev.use(route, (req, res) => {
-    let query = {...req.query, cookie: req.cookies}
-    question(query, requestMod)
-    .then(answer => {
-      console.log('[OK]', decodeURIComponent(req.originalUrl))
-      res.append('Set-Cookie', answer.cookie)
-      res.status(answer.status).send(answer.body)
-    })
-    .catch(answer => {
-      console.log('[ERR]', decodeURIComponent(req.originalUrl))
-      res.append('Set-Cookie', answer.cookie)
-      res.status(answer.status).send(answer.body)
+fs.readdirSync(path.join(__dirname, 'module')).reverse().forEach(file => {
+    if(!(/\.js$/i.test(file))) return
+    let route = (file in special) ? special[file] : '/' + file.replace(/\.js$/i, '').replace(/_/g, '/')
+    let question = require(path.join(__dirname, 'module', file))
+    
+    app.use(route, (req, res) => {
+        let query = {...req.query, ...req.body, cookie: req.cookies}
+        question(query, request)
+        .then(answer => {
+            console.log('[OK]', decodeURIComponent(req.originalUrl))
+            res.append('Set-Cookie', answer.cookie)
+            res.status(answer.status).send(answer.body)
+        })
+        .catch(answer => {
+            console.log('[ERR]', decodeURIComponent(req.originalUrl))
+            if(answer.body.code =='301') answer.body.msg = '需要登录'
+            res.append('Set-Cookie', answer.cookie)
+            res.status(answer.status).send(answer.body)
+        })
     })
-  })
 })
-app.use('/', dev)
 
 const port = process.env.PORT || 3000
 
 app.server = app.listen(port, () => {
-  console.log(`server running @ http://localhost:${port}`)
+    console.log(`server running @ http://localhost:${port}`)
 })
 
 module.exports = app

package.json

@@ -16,7 +16,6 @@
   "license": "MIT",
   "dependencies": {
     "apicache": "^1.2.1",
-    "big-integer": "^1.6.28",
     "express": "^4.16.3",
     "request": "^2.85.0"
   },
@@ -25,4 +24,4 @@
     "mocha": "^5.1.1",
     "power-assert": "^1.5.0"
   }
-}
\ No newline at end of file
+}

util/crypto.js

-// 参考 https://github.com/darknessomi/musicbox/wiki/
-'use strict'
 const crypto = require('crypto')
-const bigInt = require('big-integer')
-const modulus =
-  '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'
-const nonce = '0CoJUm6Qyw8W8jud'
-const pubKey = '010001'
-
-String.prototype.hexEncode = function() {
-  let hex, i
-
-  let result = ''
-  for (i = 0; i < this.length; i++) {
-    hex = this.charCodeAt(i).toString(16)
-    result += ('' + hex).slice(-4)
-  }
-  return result
-}
-
-function createSecretKey(size) {
-  const keys = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
-  let key = ''
-  for (let i = 0; i < size; i++) {
-    let pos = Math.random() * keys.length
-    pos = Math.floor(pos)
-    key = key + keys.charAt(pos)
-  }
-  return key
-}
-
-function aesEncrypt(text, secKey) {
-  const _text = text
-  const lv = new Buffer('0102030405060708', 'binary')
-  const _secKey = new Buffer(secKey, 'binary')
-  const cipher = crypto.createCipheriv('AES-128-CBC', _secKey, lv)
-  let encrypted = cipher.update(_text, 'utf8', 'base64')
-  encrypted += cipher.final('base64')
-  return encrypted
+const iv = Buffer.from('0102030405060708')
+const presetKey = Buffer.from('0CoJUm6Qyw8W8jud')
+const linuxapiKey = Buffer.from('rFgB&h#%2?^eDg:Q')
+const base62 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
+const publicKey = '-----BEGIN PUBLIC KEY-----\nMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDgtQn2JZ34ZC28NWYpAUd98iZ37BUrX/aKzmFbt7clFSs6sXqHauqKWqdtLkF2KexO40H1YTX8z2lSgBBOAxLsvaklV8k4cBFK9snQXE9/DDaFt6Rr7iVZMldczhC0JNgTz+SHXT6CBHuX3e9SdB1Ua44oncaTWz7OBGLbCiK45wIDAQAB\n-----END PUBLIC KEY-----'
+
+const aesEncrypt = (buffer, mode, key, iv) => {
+    const cipher = crypto.createCipheriv('aes-128-' + mode, key, iv)
+    return Buffer.concat([cipher.update(buffer),cipher.final()])
 }
 
-function zfill(str, size) {
-  while (str.length < size) str = '0' + str
-  return str
+const rsaEncrypt = (buffer, key) => {
+    buffer = Buffer.concat([Buffer.alloc(128 - buffer.length), buffer])
+    return crypto.publicEncrypt({key: key, padding: crypto.constants.RSA_NO_PADDING}, buffer)
 }
 
-function rsaEncrypt(text, pubKey, modulus) {
-  const _text = text.split('').reverse().join('')
-  const biText = bigInt(new Buffer(_text).toString('hex'), 16),
-    biEx = bigInt(pubKey, 16),
-    biMod = bigInt(modulus, 16),
-    biRet = biText.modPow(biEx, biMod)
-  return zfill(biRet.toString(16), 256)
+const weapi = (object) => {
+    const text = JSON.stringify(object)
+    const secretKey = crypto.randomBytes(16).map(n => (base62.charAt(n % 62).charCodeAt()))
+    return {
+        params: aesEncrypt(Buffer.from(aesEncrypt(Buffer.from(text), 'cbc', presetKey, iv).toString('base64')), 'cbc', secretKey, iv).toString('base64'),
+        encSecKey: rsaEncrypt(secretKey.reverse(), publicKey).toString('hex')
+    }
 }
 
-function Encrypt(obj) {
-  const text = JSON.stringify(obj)
-  const secKey = createSecretKey(16)
-  const encText = aesEncrypt(aesEncrypt(text, nonce), secKey)
-  const encSecKey = rsaEncrypt(secKey, pubKey, modulus)
-  return {
-    params: encText,
-    encSecKey: encSecKey
-  }
+const linuxapi = (object) => {
+    const text = JSON.stringify(object)
+    return {
+        eparams: aesEncrypt(Buffer.from(text), 'ecb', linuxapiKey, '').toString('hex').toUpperCase()
+    }
 }
 
-module.exports = Encrypt
+module.exports = {weapi, linuxapi}
\ No newline at end of file

util/init.js

-function randomString(pattern, length){
-	return Array.apply(null, {length: length}).map(() => (pattern[Math.floor(Math.random() * pattern.length)])).join('')
-}
-
-function completeCookie(cookie){
-	let origin = (cookie || '').split(/;\s*/).map(element => (element.split('=')[0])), extra = []
-	let now = Date.now()
-
-	if(!origin.includes('JSESSIONID-WYYY')){
-		let expire = new Date(now + 1800000) //30 minutes 
-		let jessionid = randomString('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKMNOPQRSTUVWXYZ\\/+',176) + ':' + expire.getTime()
-		extra.push(['JSESSIONID-WYYY=' + jessionid, 'Expires=' + expire.toGMTString()])
-	}
-	if(!origin.includes('_iuqxldmzr_')){
-		let expire = new Date(now + 157680000000) //5 years
-		extra.push(['_iuqxldmzr_=32', 'Expires=' + expire.toGMTString()])
-	}
-	if((!origin.includes('_ntes_nnid'))||(!origin.includes('_ntes_nuid'))){
-		let expire = new Date(now + 3153600000000) //100 years
-		let nnid = randomString('0123456789abcdefghijklmnopqrstuvwxyz',32) + ',' + now
-		extra.push(['_ntes_nnid=' + nnid, 'Expires=' + expire.toGMTString()])
-		extra.push(['_ntes_nuid=' + nnid.slice(0,32), 'Expires=' + expire.toGMTString()])
-	}
-
-	return extra
-}
-
-module.exports = {
-	completeCookie
-}
\ No newline at end of file

util/request.js

-const encrypt = require('./crypto.js')
+const encrypt = require('./crypto')
 const request = require('request')
 const queryString = require('querystring')
 
-// request.debug = false
+request.debug = true
 
-function chooseUserAgent(ua) {
+function chooseUserAgent(ua){
     const userAgentList = [
         'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
         'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1',
@@ -38,7 +38,7 @@ function createRequest(method, url, data, options){
 
         let headers = {'User-Agent': chooseUserAgent(options.ua)}
         if(method.toUpperCase() == 'POST') headers['Content-Type'] = 'application/x-www-form-urlencoded'
-        if(url.indexOf('music.163.com') != -1) headers['Referer'] = 'http://music.163.com'
+        if(url.includes('music.163.com')) headers['Referer'] = 'http://music.163.com'
         // headers['X-Real-IP'] = '118.88.88.88'
 
         if(typeof(options.cookie) === 'object')
@@ -47,9 +47,15 @@ function createRequest(method, url, data, options){
             headers['Cookie'] = options.cookie
 
         if(options.crypto == 'weapi'){
-            const csrfToken = (headers['Cookie'] || '').match(/_csrf=([^(;|$)]+)/)
+            let csrfToken = (headers['Cookie'] || '').match(/_csrf=([^(;|$)]+)/)
             data.csrf_token = (csrfToken ? csrfToken[1] : '')
-            data = encrypt(data)
+            data = encrypt.weapi(data)
+            url = url.replace(/\w*api/,'weapi')
+        }
+        else if(options.crypto == 'linuxapi'){
+            data = encrypt.linuxapi({'method': method, url: url.replace(/\w*api/,'api'), 'params': data})
+            headers['User-Agent'] = 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36'
+            url = 'http://music.163.com/api/linux/forward'
         }
 
         const answer = {status: 500, body: {}, cookie: []}
@@ -66,9 +72,6 @@ function createRequest(method, url, data, options){
                     try{
                         answer.body = JSON.parse(body)
                         answer.status = answer.body.code || res.statusCode
-                        if(answer.body.code=='301'){
-                            answer.body.apiMsg='需要登陆'
-                        }
                     }
                     catch(e){
                         answer.body = body