Reconstruct
MengYX
5 years ago
parent
bc138c4078
commit
bddde78fcd
@ -0,0 +1,44 @@
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const NcmDecrypt = require("./ncm");
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const QmcDecrypt = require("./qmc");
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const RawDecrypt = require("./raw");
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const MFlacDecrypt = require("./mflac");
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export {CommonDecrypt}
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async function CommonDecrypt(file) {
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let raw_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
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let raw_filename = file.name.substring(0, file.name.lastIndexOf("."));
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let rt_data;
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switch (raw_ext) {
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case "ncm":// Netease Mp3/Flac
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rt_data = await NcmDecrypt.Decrypt(file.raw);
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break;
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case "mp3":// Raw Mp3
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case "flac"://Raw Flac
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case "m4a":// todo: Raw M4A
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case "tm0":// QQ Music IOS Mp3
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case "tm3":// QQ Music IOS Mp3
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rt_data = await RawDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
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break;
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case "qmc3"://QQ Music Android Mp3
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case "qmc0"://QQ Music Android Mp3
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case "qmcflac"://QQ Music Android Flac
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case "qmcogg"://QQ Music Android Ogg
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rt_data = await QmcDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
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break;
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case "mflac"://QQ Music Desktop Flac
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rt_data = await MFlacDecrypt.Decrypt(file.raw, raw_filename, raw_ext);
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break;
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case "tm2":// todo: QQ Music IOS M4A
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case "tm6":// todo: QQ Music IOS M4A
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debugger;
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break;
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default:
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rt_data = {status: false, message: "不支持此文件格式",}
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}
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if (rt_data.status) {
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rt_data.rawExt = raw_ext;
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rt_data.rawFilename = raw_filename;
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}
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return rt_data;
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}
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@ -0,0 +1,171 @@
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const CryptoJS = require("crypto-js");
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const ID3Writer = require("browser-id3-writer");
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const util = require("./util");
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const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
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const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
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export {Decrypt};
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async function Decrypt(file) {
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const fileBuffer = await util.GetArrayBuffer(file);
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const dataView = new DataView(fileBuffer);
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if (dataView.getUint32(0, true) !== 0x4e455443 ||
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dataView.getUint32(4, true) !== 0x4d414446)
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return {status: false, message: "此ncm文件已损坏"};
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const keyDataObj = getKeyData(dataView, fileBuffer, 10);
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const keyBox = getKeyBox(keyDataObj.data);
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const musicMetaObj = getMetaData(dataView, fileBuffer, keyDataObj.offset);
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const musicMeta = musicMetaObj.data;
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let audioOffset = musicMetaObj.offset + dataView.getUint32(musicMetaObj.offset + 5, true) + 13;
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let audioData = new Uint8Array(fileBuffer, audioOffset);
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for (let cur = 0; cur < audioData.length; ++cur) {
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audioData[cur] ^= keyBox[cur & 0xff];
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}
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if (musicMeta.format === undefined) {
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const [f, L, a, C] = audioData;
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if (f === 0x66 && L === 0x4c && a === 0x61 && C === 0x43) {
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musicMeta.format = "flac";
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} else {
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musicMeta.format = "mp3";
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}
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}
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const mime = util.AudioMimeType[musicMeta.format];
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const artists = [];
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musicMeta.artist.forEach(arr => {
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artists.push(arr[0]);
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});
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if (musicMeta.format === "mp3") {
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audioData = await writeID3(audioData, artists, musicMeta.musicName, musicMeta.album, musicMeta.albumPic)
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}
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const musicData = new Blob([audioData], {type: mime});
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const musicUrl = URL.createObjectURL(musicData);
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const filename = artists.join(" & ") + " - " + musicMeta.musicName + "." + musicMeta.format;
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return {
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status: true,
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filename: filename,
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title: musicMeta.musicName,
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artist: artists.join(" & "),
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album: musicMeta.album,
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picture: musicMeta.albumPic,
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file: musicUrl,
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mime: mime
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};
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}
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async function writeID3(audioData, artistList, title, album, picture) {
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const writer = new ID3Writer(audioData);
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writer.setFrame("TPE1", artistList)
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.setFrame("TIT2", title)
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.setFrame("TALB", album);
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if (picture !== "") {
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try {
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const img = await (await fetch(picture)).arrayBuffer();
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writer.setFrame('APIC', {
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type: 3,
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data: img,
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description: 'Cover'
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})
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} catch (e) {
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console.log("Fail to write cover image!");
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}
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}
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writer.addTag();
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return writer.arrayBuffer;
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}
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function getKeyData(dataView, fileBuffer, offset) {
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const keyLen = dataView.getUint32(offset, true);
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offset += 4;
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const cipherText = new Uint8Array(fileBuffer, offset, keyLen).map(
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uint8 => uint8 ^ 0x64
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);
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offset += keyLen;
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const plainText = CryptoJS.AES.decrypt(
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{ciphertext: CryptoJS.lib.WordArray.create(cipherText)},
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CORE_KEY,
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{
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mode: CryptoJS.mode.ECB,
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padding: CryptoJS.pad.Pkcs7
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}
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);
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const result = new Uint8Array(plainText.sigBytes);
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const words = plainText.words;
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const sigBytes = plainText.sigBytes;
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for (let i = 0; i < sigBytes; i++) {
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result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
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}
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return {offset: offset, data: result.slice(17)};
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}
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function getKeyBox(keyData) {
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const box = new Uint8Array(Array(256).keys());
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const keyDataLen = keyData.length;
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let j = 0;
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for (let i = 0; i < 256; i++) {
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j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
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[box[i], box[j]] = [box[j], box[i]];
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}
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return box.map((_, i, arr) => {
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i = (i + 1) & 0xff;
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const si = arr[i];
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const sj = arr[(i + si) & 0xff];
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return arr[(si + sj) & 0xff];
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});
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}
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/**
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* @typedef {Object} MusicMetaType
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* @property {Number} musicId
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* @property {String} musicName
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* @property {[[String, Number]]} artist
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* @property {String} album
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* @property {"flac"|"mp3"} format
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* @property {String} albumPic
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*/
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function getMetaData(dataView, fileBuffer, offset) {
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const metaDataLen = dataView.getUint32(offset, true);
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offset += 4;
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if (metaDataLen === 0) {
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return {};
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}
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const cipherText = new Uint8Array(fileBuffer, offset, metaDataLen).map(
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data => data ^ 0x63
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);
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offset += metaDataLen;
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const plainText = CryptoJS.AES.decrypt({
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ciphertext: CryptoJS.enc.Base64.parse(
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CryptoJS.lib.WordArray.create(cipherText.slice(22)).toString(CryptoJS.enc.Utf8)
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)
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},
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META_KEY,
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{mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
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);
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const result = JSON.parse(plainText.toString(CryptoJS.enc.Utf8).slice(6));
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result.albumPic = result.albumPic.replace("http:", "https:");
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return {data: result, offset: offset};
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}
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@ -0,0 +1,25 @@
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const musicMetadata = require("music-metadata-browser");
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const util = require("./util");
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export {Decrypt}
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async function Decrypt(file, raw_filename, raw_ext) {
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let tag = await musicMetadata.parseBlob(file);
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let fileUrl = URL.createObjectURL(file);
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const picUrl = util.GetCoverURL(tag);
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const mime = util.AudioMimeType[raw_ext];
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const info = util.GetFileInfo(tag.common.artist, tag.common.title, raw_filename, raw_ext);
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return {
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status: true,
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filename: info.filename,
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title: info.title,
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artist: info.artist,
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album: tag.common.album,
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picture: picUrl,
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file: fileUrl,
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mime: mime
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}
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}
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@ -0,0 +1,51 @@
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export {GetArrayBuffer, GetFileInfo, GetCoverURL, AudioMimeType}
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// Also a new draft API: blob.arrayBuffer()
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async function GetArrayBuffer(blobObject) {
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return await new Promise(resolve => {
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const reader = new FileReader();
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reader.onload = (e) => {
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resolve(e.target.result);
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};
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reader.readAsArrayBuffer(blobObject);
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});
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}
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const AudioMimeType = {
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mp3: "audio/mpeg",
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flac: "audio/flac",
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m4a: "audio/mp4",
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ogg: "audio/ogg"
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};
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function GetFileInfo(artist, title, filenameNoExt, ext) {
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let newArtist = "", newTitle = "";
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let filenameArray = filenameNoExt.split("-");
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if (filenameArray.length > 1) {
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newArtist = filenameArray[0].trim();
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newTitle = filenameArray[1].trim();
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} else if (filenameArray.length === 1) {
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newTitle = filenameArray[0].trim();
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}
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if (typeof artist == "string" && artist !== "") {
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newArtist = artist;
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}
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if (typeof title == "string" && title !== "") {
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newTitle = title;
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}
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let newFilename = newArtist + " - " + newTitle + "." + ext;
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return {artist: newArtist, title: newTitle, filename: newFilename};
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}
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/**
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* @return {string}
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*/
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function GetCoverURL(metadata) {
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let pic_url = "";
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if (metadata.common.picture !== undefined && metadata.common.picture.length > 0) {
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let pic = new Blob([metadata.common.picture[0].data], {type: metadata.common.picture[0].format});
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pic_url = URL.createObjectURL(pic);
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}
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return pic_url;
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}
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@ -1,183 +0,0 @@
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const CryptoJS = require("crypto-js");
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const ID3Writer = require("browser-id3-writer");
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const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
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const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
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const audio_mime_type = {
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mp3: "audio/mpeg",
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flac: "audio/flac"
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};
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export {Decrypt};
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async function Decrypt(file) {
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const fileBuffer = await new Promise(reslove => {
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const reader = new FileReader();
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reader.onload = (e) => {
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reslove(e.target.result);
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};
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reader.readAsArrayBuffer(file);
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});
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const dataView = new DataView(fileBuffer);
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if (dataView.getUint32(0, true) !== 0x4e455443 ||
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dataView.getUint32(4, true) !== 0x4d414446
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) return {
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status: false,
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message: "此ncm文件已损坏",
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};
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let offset = 10;
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const keyData = (() => {
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const keyLen = dataView.getUint32(offset, true);
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offset += 4;
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const cipherText = new Uint8Array(fileBuffer, offset, keyLen).map(
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uint8 => uint8 ^ 0x64
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);
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offset += keyLen;
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const plainText = CryptoJS.AES.decrypt(
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{ciphertext: CryptoJS.lib.WordArray.create(cipherText)},
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CORE_KEY,
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{
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mode: CryptoJS.mode.ECB,
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padding: CryptoJS.pad.Pkcs7
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}
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);
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const result = new Uint8Array(plainText.sigBytes);
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const words = plainText.words;
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const sigBytes = plainText.sigBytes;
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for (let i = 0; i < sigBytes; i++) {
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result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
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}
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return result.slice(17);
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})();
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const keyBox = (() => {
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const box = new Uint8Array(Array(256).keys());
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const keyDataLen = keyData.length;
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let j = 0;
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for (let i = 0; i < 256; i++) {
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j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
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[box[i], box[j]] = [box[j], box[i]];
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}
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return box.map((_, i, arr) => {
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i = (i + 1) & 0xff;
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const si = arr[i];
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const sj = arr[(i + si) & 0xff];
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return arr[(si + sj) & 0xff];
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});
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})();
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/**
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* @typedef {Object} MusicMetaType
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* @property {Number} musicId
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* @property {String} musicName
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* @property {[[String, Number]]} artist
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* @property {String} album
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* @property {"flac"|"mp3"} format
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* @property {String} albumPic
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*/
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/** @type {MusicMetaType|undefined} */
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const musicMeta = (() => {
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const metaDataLen = dataView.getUint32(offset, true);
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offset += 4;
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if (metaDataLen === 0) {
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return {};
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}
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const cipherText = new Uint8Array(fileBuffer, offset, metaDataLen).map(
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data => data ^ 0x63
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);
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offset += metaDataLen;
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const plainText = CryptoJS.AES.decrypt(
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{
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ciphertext: CryptoJS.enc.Base64.parse(
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CryptoJS.lib.WordArray.create(cipherText.slice(22)).toString(CryptoJS.enc.Utf8)
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)
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},
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META_KEY,
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{mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
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);
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const result = JSON.parse(plainText.toString(CryptoJS.enc.Utf8).slice(6));
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result.albumPic = result.albumPic.replace("http:", "https:");
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return result;
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})();
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offset += dataView.getUint32(offset + 5, true) + 13;
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let audioData = new Uint8Array(fileBuffer, offset);
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let audioDataLen = audioData.length;
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for (let cur = 0; cur < audioDataLen; ++cur) {
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audioData[cur] ^= keyBox[cur & 0xff];
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}
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if (musicMeta.format === undefined) {
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const [f, L, a, C] = audioData;
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if (f === 0x66 && L === 0x4c && a === 0x61 && C === 0x43) {
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musicMeta.format = "flac";
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} else {
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musicMeta.format = "mp3";
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}
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}
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const mime = audio_mime_type[musicMeta.format];
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const artists = [];
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musicMeta.artist.forEach(arr => {
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artists.push(arr[0]);
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});
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if (musicMeta.format === "mp3") {
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const writer = new ID3Writer(audioData);
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writer.setFrame("TPE1", artists)
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.setFrame("TIT2", musicMeta.musicName)
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.setFrame("TALB", musicMeta.album);
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if (musicMeta.albumPic !== "") {
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try {
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const img = await (await fetch(musicMeta.albumPic)).arrayBuffer();
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writer.setFrame('APIC', {
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type: 3,
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data: img,
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description: 'Cover'
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})
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} catch (e) {
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console.log("Fail to write cover image!");
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}
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}
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writer.addTag();
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audioData = writer.arrayBuffer;
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}
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const musicData = new Blob([audioData], {
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type: mime
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});
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const musicUrl = URL.createObjectURL(musicData);
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const filename = artists.join(" & ") + " - " + musicMeta.musicName + "." + musicMeta.format;
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return {
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status: true,
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filename: filename,
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title: musicMeta.musicName,
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artist: artists.join(" & "),
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album: musicMeta.album,
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picture: musicMeta.albumPic,
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file: musicUrl,
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mime: mime
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};
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}
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@ -1,44 +0,0 @@
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const musicMetadata = require("music-metadata-browser");
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export {Decrypt}
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const audio_mime_type = {
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mp3: "audio/mpeg",
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flac: "audio/flac"
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};
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|
||||
async function Decrypt(file) {
|
||||
let tag = await musicMetadata.parseBlob(file);
|
||||
let pic_url = "";
|
||||
if (tag.common.picture !== undefined && tag.common.picture.length > 0) {
|
||||
let pic = new Blob([tag.common.picture[0].data], {type: tag.common.picture[0].format});
|
||||
pic_url = URL.createObjectURL(pic);
|
||||
}
|
||||
|
||||
let file_url = URL.createObjectURL(file);
|
||||
|
||||
let filename_no_ext = file.name.substring(0, file.name.lastIndexOf("."));
|
||||
let filename_array = filename_no_ext.split("-");
|
||||
let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
|
||||
const mime = audio_mime_type[filename_ext];
|
||||
let title = tag.common.title;
|
||||
let artist = tag.common.artist;
|
||||
|
||||
if (filename_array.length > 1) {
|
||||
if (artist === undefined) artist = filename_array[0].trim();
|
||||
if (title === undefined) title = filename_array[1].trim();
|
||||
} else if (filename_array.length === 1) {
|
||||
if (title === undefined) title = filename_array[0].trim();
|
||||
}
|
||||
|
||||
const filename = artist + " - " + title + "." + filename_ext;
|
||||
return {
|
||||
status:true,
|
||||
filename: filename,
|
||||
title: title,
|
||||
artist: artist,
|
||||
album: tag.common.album,
|
||||
picture: pic_url,
|
||||
file: file_url,
|
||||
mime: mime
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue