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forked from um/web
qqmusicunlock/src/decrypt/qmc.js
2020-04-23 18:16:33 +08:00

122 lines
5.0 KiB
JavaScript

import {AudioMimeType, DetectAudioExt, GetArrayBuffer, GetFileInfo, GetMetaCoverURL, RequestJsonp} from "./util";
import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
import {decode} from "iconv-lite"
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) {
audioData = fileData.slice(0, -0x170);
seed = handler.handler(audioData);
keyData = fileData.slice(-0x170);
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);
//todo: 解决跨域获取图像的问题
}
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: Array.from(maskData), Key: Array.from(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: Array.from(keyData), Filename: filename}),
});
let data = await resp.json();
return QmcMaskCreate58(data.Matrix58, data.Super58A, data.Super58B);
} catch (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.error(e)
}
console.log(queriedSong);
let imgUrl = "";
if (!!queriedSong && !!queriedSong["album"]) {
if (queriedSong["album"]["pmid"] !== undefined) {
imgUrl = "https://y.gtimg.cn/music/photo_new/T002M000" + queriedSong["album"]["pmid"] + ".jpg"
} else if (queriedSong["album"]["id"] !== undefined) {
imgUrl = "https://imgcache.qq.com/music/photo/album/" +
queriedSong["album"]["id"] % 100 +
"/albumpic_" + queriedSong["album"]["id"] + "_0.jpg"
}
}
return imgUrl;
}