1
0
forked from um/web
qqmusicunlock/src/decrypt/qmc.js
2020-07-18 19:25:41 +08:00

158 lines
6.2 KiB
JavaScript

import {
AudioMimeType,
DetectAudioExt,
GetArrayBuffer,
GetFileInfo,
GetMetaCoverURL,
GetWebImage,
RequestJsonp
} from "./util";
const MetaFlac = require('metaflac-js');
import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
import {fromByteArray as Base64Encode, toByteArray as Base64Decode} from 'base64-js'
const ID3Writer = require("browser-id3-writer");
const iconv = require('iconv-lite');
const decode = iconv.decode
const musicMetadata = require("music-metadata-browser");
const HandlerMap = {
"mgg": {handler: QmcMaskDetectMgg, ext: "ogg", detect: true},
"mflac": {handler: QmcMaskDetectMflac, ext: "flac", detect: true},
"qmc0": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"qmc2": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
"qmc3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"qmcogg": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
"qmcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
"bkcmp3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"bkcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
"tkm": {handler: QmcMaskGetDefault, ext: "m4a", detect: false}
};
export async function Decrypt(file, raw_filename, raw_ext) {
if (!(raw_ext in HandlerMap)) return {status: false, message: "File type is incorrect!"};
const handler = HandlerMap[raw_ext];
const fileData = new Uint8Array(await GetArrayBuffer(file));
let audioData, seed, keyData;
if (handler.detect) {
const keyLen = new DataView(fileData.slice(fileData.length - 4).buffer).getUint32(0, true)
const keyPos = fileData.length - 4 - keyLen;
audioData = fileData.slice(0, keyPos);
seed = handler.handler(audioData);
keyData = fileData.slice(keyPos, keyPos + keyLen);
if (seed === undefined) seed = await queryKeyInfo(keyData, raw_filename, raw_ext);
if (seed === undefined) return {status: false, message: raw_ext + "格式仅提供实验性支持"};
} else {
audioData = fileData;
seed = handler.handler(audioData);
}
let musicDecoded = seed.Decrypt(audioData);
const ext = DetectAudioExt(musicDecoded, handler.ext);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([musicDecoded], {type: mime});
const musicMeta = await musicMetadata.parseBlob(musicBlob);
for (let metaIdx in musicMeta.native) {
if (musicMeta.native[metaIdx].some(item => item.id === "TCON" && item.value === "(12)")) {
musicMeta.common.artist = decode(musicMeta.common.artist, "gbk");
musicMeta.common.title = decode(musicMeta.common.title, "gbk");
musicMeta.common.album = decode(musicMeta.common.album, "gbk");
}
}
const info = GetFileInfo(musicMeta.common.artist, musicMeta.common.title, raw_filename);
if (handler.detect) reportKeyUsage(keyData, seed.Matrix128,
info.artist, info.title, musicMeta.common.album, raw_filename, raw_ext);
let imgUrl = GetMetaCoverURL(musicMeta);
if (imgUrl === "") {
imgUrl = await queryAlbumCoverImage(info.artist, info.title, musicMeta.common.album);
if (imgUrl !== "") {
const imageInfo = await GetWebImage(imgUrl);
if (imageInfo.url !== "") {
imgUrl = imageInfo.url
if (ext === "mp3") {
let writer = new ID3Writer(musicDecoded)
writer.setFrame('APIC', {
type: 3,
data: imageInfo.buffer,
description: "Cover",
})
writer.addTag();
musicDecoded = writer.arrayBuffer
musicBlob = new Blob([musicDecoded], {type: mime});
} else if (ext === 'flac') {
const writer = new MetaFlac(Buffer.from(musicDecoded))
writer.importPictureFromBuffer(Buffer.from(imageInfo.buffer))
musicDecoded = writer.save()
musicBlob = new Blob([musicDecoded], {type: mime});
}
}
}
}
return {
status: true,
title: info.title,
artist: info.artist,
ext: ext,
album: musicMeta.common.album,
picture: imgUrl,
file: URL.createObjectURL(musicBlob),
mime: mime
}
}
function reportKeyUsage(keyData, maskData, artist, title, album, filename, format) {
fetch("https://stats.ixarea.com/collect/qmcmask/usage", {
method: "POST",
headers: {"Content-Type": "application/json"},
body: JSON.stringify({
Mask: Base64Encode(new Uint8Array(maskData)), Key: Base64Encode(keyData),
Artist: artist, Title: title, Album: album, Filename: filename, Format: format
}),
}).then().catch()
}
async function queryKeyInfo(keyData, filename, format) {
try {
const resp = await fetch("https://stats.ixarea.com/collect/qmcmask/query", {
method: "POST",
headers: {"Content-Type": "application/json"},
body: JSON.stringify({Format: format, Key: Base64Encode(keyData), Filename: filename, Type: 44}),
});
let data = await resp.json();
return QmcMaskCreate58(Base64Decode(data.Matrix44));
} catch (e) {
console.log(e);
}
}
async function queryAlbumCoverImage(artist, title, album) {
let song_query_url = "https://c.y.qq.com/soso/fcgi-bin/client_search_cp?n=10&new_json=1&w=" +
encodeURIComponent(artist + " " + title + " " + album);
let jsonpData;
let queriedSong = undefined;
try {
jsonpData = await RequestJsonp(song_query_url, "callback");
queriedSong = jsonpData["data"]["song"]["list"][0];
} catch (e) {
console.log(e)
}
let imgUrl = "";
if (!!queriedSong && !!queriedSong["album"]) {
if (queriedSong["album"]["pmid"] !== undefined) {
imgUrl = "https://stats.ixarea.com/collect/music/qq-cover/1/" + queriedSong["album"]["pmid"]
} else if (queriedSong["album"]["id"] !== undefined) {
imgUrl = "https://stats.ixarea.com/collect/music/qq-cover/2/" + queriedSong["album"]["id"]
}
}
return imgUrl;
}