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Partially implemented decryption and continued working on downloader
Also added eslintpull/1/head
15 changed files with 2694 additions and 82 deletions
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+13 -0.eslintrc.json
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+120 -0deemix/decryption.js
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+122 -6deemix/downloader.js
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+13 -9deemix/itemgen.js
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+17 -14deemix/types/Album.js
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+3 -3deemix/types/Artist.js
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+1 -1deemix/types/Date.js
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+6 -6deemix/types/DownloadObjects.js
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+1 -1deemix/types/Lyrics.js
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+16 -6deemix/types/Picture.js
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+9 -9deemix/types/Playlist.js
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+67 -24deemix/types/Track.js
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+1 -1deemix/utils/index.js
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+2301 -2package-lock.json
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+4 -0package.json
+ 13
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.eslintrc.json
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| @ -0,0 +1,13 @@ | |||
| { | |||
| "env": { | |||
| "commonjs": true, | |||
| "es2021": true, | |||
| "node": true | |||
| }, | |||
| "extends": "eslint:recommended", | |||
| "parserOptions": { | |||
| "ecmaVersion": 12 | |||
| }, | |||
| "rules": { | |||
| } | |||
| } | |||
+ 120
- 0
deemix/decryption.js
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| @ -0,0 +1,120 @@ | |||
| const crypto = require('crypto') | |||
| const got = require('got'); | |||
| function _md5 (data, type = 'binary') { | |||
| let md5sum = crypto.createHash('md5') | |||
| md5sum.update(Buffer.from(data, type)) | |||
| return md5sum.digest('hex') | |||
| } | |||
| function _ecbCrypt (key, data) { | |||
| let cipher = crypto.createCipheriv("aes-128-ecb", Buffer.from(key), Buffer.from("")); | |||
| return Buffer.concat([cipher.update(data, 'binary'), cipher.final()]).toString("hex").toLowerCase(); | |||
| } | |||
| function _ecbDecrypt (key, data) { | |||
| let cipher = crypto.createDecipheriv("aes-128-ecb", Buffer.from(key), Buffer.from("")); | |||
| return Buffer.concat([cipher.update(data, 'binary'), cipher.final()]).toString("hex").toLowerCase(); | |||
| } | |||
| function generateStreamPath(sngID, md5, mediaVersion, format){ | |||
| let urlPart = md5+"¤"+format+"¤"+sngID+"¤"+mediaVersion | |||
| let md5val = _md5(urlPart) | |||
| let step2 = md5val+"¤"+urlPart+"¤" | |||
| step2 += ('.' * (16 - (step2.length % 16))) | |||
| urlPart = _ecbCrypt('jo6aey6haid2Teih', step2) | |||
| return urlPart | |||
| } | |||
| function reverseStreamPath(urlPart){ | |||
| let step2 = _ecbDecrypt('jo6aey6haid2Teih', urlPart) | |||
| let [, md5, format, sngID, mediaVersion] = step2.split("¤") | |||
| return [sngID, md5, mediaVersion, format] | |||
| } | |||
| function generateStreamURL(sngID, md5, mediaVersion, format){ | |||
| let urlPart = generateStreamPath(sngID, md5, mediaVersion, format) | |||
| return "https://e-cdns-proxy-" + md5[0] + ".dzcdn.net/api/1/" + urlPart | |||
| } | |||
| function reverseStreamURL(url){ | |||
| let urlPart = url.substring(url.find("/1/")+3) | |||
| return reverseStreamPath(urlPart) | |||
| } | |||
| function streamTrack(outputStream, track, start=0, downloadObject, listener){ | |||
| let headers = {'User-Agent': ""} | |||
| let chunkLength = start | |||
| let complete = 0 | |||
| got.get(track.downloadUrl, { | |||
| headers: headers, | |||
| stream: true, | |||
| timeout: 10000 | |||
| }).on('response', (response)=>{ | |||
| complete = parseInt(response.headers["Content-Length"]) | |||
| if (complete == 0) throw new DownloadEmpty | |||
| if (start != 0){ | |||
| let responseRange = response.headers["Content-Range"] | |||
| console.log(`downloading range ${responseRange}`) | |||
| }else { | |||
| console.log(`downloading ${complete} bytes`) | |||
| } | |||
| }).on("data", (data)=>{ | |||
| outputStream.write(data) | |||
| chunkLength += data.length | |||
| if (downloadObject){ | |||
| let chunkProgres | |||
| if (downloadObject.__type__ === "Single"){ | |||
| chunkProgres = (chunkLength / (complete + start)) * 100 | |||
| downloadObject.progressNext = chunkProgres | |||
| }else{ | |||
| chunkProgres = (data.length / (complete + start)) / downloadObject.size * 100 | |||
| downloadObject.progressNext += chunkProgres | |||
| } | |||
| downloadObject.updateProgress(listener) | |||
| } | |||
| }).on("error", (error)=>{ | |||
| console.error(error) | |||
| return streamTrack(outputStream, track, chunkLength, downloadObject, listener) | |||
| }) | |||
| } | |||
| class DownloadEmpty extends Error { | |||
| constructor(message) { | |||
| super(message); | |||
| this.name = "DownloadEmpty" | |||
| } | |||
| } | |||
| /* | |||
| function generateBlowfishKey(trackId) { | |||
| const SECRET = 'g4el58wc0zvf9na1'; | |||
| const idMd5 = _md5(trackId.toString(), 'ascii') | |||
| let bfKey = '' | |||
| for (let i = 0; i < 16; i++) { | |||
| bfKey += String.fromCharCode(idMd5.charCodeAt(i) ^ idMd5.charCodeAt(i + 16) ^ SECRET.charCodeAt(i)) | |||
| } | |||
| return bfKey; | |||
| } | |||
| function generateCryptedStreamURL(sngID, md5, mediaVersion, format){ | |||
| let urlPart = generateStreamPath(sngID, md5, mediaVersion, format) | |||
| return "https://e-cdns-proxy-" + md5[0] + ".dzcdn.net/mobile/1/" + urlPart | |||
| } | |||
| function decryptChunk(chunk, blowFishKey){ | |||
| var cipher = crypto.createDecipheriv('bf-cbc', blowFishKey, Buffer.from([0, 1, 2, 3, 4, 5, 6, 7])) | |||
| cipher.setAutoPadding(false) | |||
| return cipher.update(chunk, 'binary', 'binary') + cipher.final() | |||
| } | |||
| */ | |||
| module.exports = { | |||
| generateStreamPath, | |||
| generateStreamURL, | |||
| reverseStreamPath, | |||
| reverseStreamURL, | |||
| streamTrack | |||
| } | |||