maintenance: update ci

(cherry picked from commit 10e35c5d3e4391e22fd005f04ab7be0e503c971a)

.github/workflows/build.yml

@@ -20,8 +20,14 @@ on:
       - "package.json"
 
 
-
 jobs:
+  test-coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Test Coverage
+        uses: ArtiomTr/jest-coverage-report-action@v2.0-rc.6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
   build:
     runs-on: ubuntu-latest
     strategy:
@@ -37,40 +43,30 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Use Node.js 14.x
+      - name: Use Node.js 16.x
         uses: actions/setup-node@v2
         with:
-          node-version: "14"
+          node-version: "16"
 
       - name: Install Dependencies
-        run: |
-          npm ci
-          npm run fix-compatibility
+        run: npm ci
 
       - name: Build
-        env:
-          GZIP: "--best"
-        run: |
-          npm run build ${{ matrix.BUILD_ARGS }}
-          tar -czvf dist.tar.gz -C ./dist .
-
-      - name: Build Extension
-        if: ${{ matrix.BUILD_EXTENSION }}
-        run: |
-          npm run make-extension
-          cd dist
-          zip -rJ9 ../extension.zip *
-          cd ..
+        run: npm run build ${{ matrix.BUILD_ARGS }}
 
       - name: Publish artifact
         uses: actions/upload-artifact@v2
         with:
-          name: unlock-music-${{ matrix.build }}.tar.gz
-          path: ./dist.tar.gz
+          name: ${{ matrix.build }}
+          path: ./dist
+
+      - name: Build Extension
+        if: ${{ matrix.BUILD_EXTENSION }}
+        run: npm run make-extension
 
       - name: Publish artifact - Extension
         if: ${{ matrix.BUILD_EXTENSION }}
         uses: actions/upload-artifact@v2
         with:
-          name: extension.zip
-          path: ./extension.zip
+          name: extension
+          path: ./dist

.github/workflows/release-build.yml

@@ -11,15 +11,13 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Use Node.js 14.x
+      - name: Use Node.js 16.x
         uses: actions/setup-node@v2
         with:
-          node-version: "14"
+          node-version: "16"
 
       - name: Install Dependencies
-        run: |
-          npm ci
-          npm run fix-compatibility
+        run: npm ci
 
       - name: Build Legacy
         env:

.gitignore

@@ -1,6 +1,7 @@
 .DS_Store
 node_modules
 /dist
+/coverage
 
 # local env files
 .env.local

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019-2020 MengYX
+Copyright (c) 2019-2021 MengYX
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

babel.config.js

@@ -1,6 +1,7 @@
 module.exports = {
     presets: [
-        '@vue/app'
+        '@vue/app',
+        '@babel/preset-typescript'
     ],
     plugins: [
         ["component", {

jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+    moduleNameMapper: {
+        '@/(.*)': '<rootDir>/src/$1'
+    }
+};

package.json

@@ -1,6 +1,6 @@
 {
   "name": "unlock-music",
-  "version": "v1.9.0",
+  "version": "v1.10.0-beta.1",
   "updateInfo": "新增写入本地文件系统; 优化.kwm解锁; 支持.acc嗅探; 使用Typescript重构",
   "license": "MIT",
   "description": "Unlock encrypted music file in browser.",
@@ -10,12 +10,15 @@
   },
   "private": true,
   "scripts": {
+    "postinstall": "patch-package",
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",
-    "fix-compatibility": "node ./src/fix-compatibility.js",
+    "test": "jest",
     "make-extension": "node ./make-extension.js"
   },
   "dependencies": {
+    "@babel/preset-typescript": "^7.16.5",
+    "@jixun/qmc2-crypto": "^0.0.5-R4",
     "base64-js": "^1.5.1",
     "browser-id3-writer": "^4.4.0",
     "core-js": "^3.16.0",
@@ -24,23 +27,27 @@
     "iconv-lite": "^0.6.3",
     "jimp": "^0.16.1",
     "metaflac-js": "^1.0.5",
-    "music-metadata-browser": "^2.4.3",
+    "music-metadata": "7.9.0",
+    "music-metadata-browser": "2.2.7",
     "register-service-worker": "^1.7.2",
     "threads": "^1.6.5",
     "vue": "^2.6.14"
   },
   "devDependencies": {
     "@types/crypto-js": "^4.0.2",
+    "@types/jest": "^27.0.3",
     "@vue/cli-plugin-babel": "^4.5.13",
     "@vue/cli-plugin-pwa": "^4.5.13",
     "@vue/cli-plugin-typescript": "^4.5.13",
     "@vue/cli-service": "^4.5.13",
     "babel-plugin-component": "^1.1.1",
-    "node-sass": "^5.0.0",
+    "jest": "^27.4.5",
+    "patch-package": "^6.4.7",
+    "sass": "^1.38.1",
     "sass-loader": "^10.2.0",
     "semver": "^7.3.5",
     "threads-plugin": "^1.4.0",
-    "typescript": "~4.1.6",
+    "typescript": "^4.5.4",
     "vue-cli-plugin-element": "^1.0.1",
     "vue-template-compiler": "^2.6.14"
   }

patches/threads+1.7.0.patch

@@ -0,0 +1,11 @@
+diff --git a/node_modules/threads/worker.mjs b/node_modules/threads/worker.mjs
+index c53ac7d..619007b 100644
+--- a/node_modules/threads/worker.mjs
++++ b/node_modules/threads/worker.mjs
+@@ -1,4 +1,5 @@
+-import WorkerContext from "./dist/worker/index.js"
++// Workaround: use of import seems to break minifier.
++const WorkerContext = require("./dist/worker/index.js")
+ 
+ export const expose = WorkerContext.expose
+ export const registerSerializer = WorkerContext.registerSerializer

src/decrypt/common.ts

@@ -46,8 +46,10 @@ export async function CommonDecrypt(file: FileInfo): Promise<DecryptResult> {
         case "tkm"://QQ Music Accompaniment M4a
         case "bkcmp3"://Moo Music Mp3
         case "bkcflac"://Moo Music Flac
-        case "mflac"://QQ Music Desktop Flac
-        case "mgg": //QQ Music Desktop Ogg
+        case "mflac"://QQ Music New Flac
+        case "mflac0"://QQ Music New Flac
+        case "mgg": //QQ Music New Ogg
+        case "mgg1": //QQ Music New Ogg
         case "666c6163"://QQ Music Weiyun Flac
         case "6d7033"://QQ Music Weiyun Mp3
         case "6f6767"://QQ Music Weiyun Ogg

src/decrypt/kgm.ts

@@ -5,7 +5,7 @@ import {
     GetCoverFromFile,
     GetMetaFromFile,
     SniffAudioExt
-} from "@/decrypt/utils.ts";
+} from "@/decrypt/utils";
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 import {DecryptResult} from "@/decrypt/entity";
 import config from "@/../package.json"

src/decrypt/kwm.ts

@@ -5,8 +5,8 @@ import {
     GetCoverFromFile,
     GetMetaFromFile,
     SniffAudioExt
-} from "@/decrypt/utils.ts";
-import {Decrypt as RawDecrypt} from "@/decrypt/raw.ts";
+} from "@/decrypt/utils";
+import {Decrypt as RawDecrypt} from "@/decrypt/raw";
 
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 import {DecryptResult} from "@/decrypt/entity";

src/decrypt/ncm.ts

@@ -3,11 +3,12 @@ import {
     BytesHasPrefix,
     GetArrayBuffer,
     GetImageFromURL,
-    GetMetaFromFile, IMusicMeta,
+    GetMetaFromFile,
+    IMusicMeta,
     SniffAudioExt,
     WriteMetaToFlac,
     WriteMetaToMp3
-} from "@/decrypt/utils.ts";
+} from "@/decrypt/utils";
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 import jimp from 'jimp';
 
@@ -209,7 +210,7 @@ class NcmDecrypt {
     }
 
     gatherResult(): DecryptResult {
-        if (!this.newMeta) throw Error("bad sequence")
+        if (!this.newMeta || !this.blob) throw Error("bad sequence")
         return {
             title: this.newMeta.title,
             artist: this.newMeta.artists?.join("; "),
@@ -217,7 +218,7 @@ class NcmDecrypt {
             album: this.newMeta.album,
             picture: this.image?.url,
             file: URL.createObjectURL(this.blob),
-            blob: this.blob as Blob,
+            blob: this.blob,
             mime: this.mime
         }
     }

src/decrypt/ncmcache.ts

@@ -1,4 +1,4 @@
-import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils.ts";
+import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils";
 
 import {DecryptResult} from "@/decrypt/entity";
 

src/decrypt/qmc.ts

@@ -1,141 +1,139 @@
-import {QmcMask, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
-import {toByteArray as Base64Decode} from 'base64-js'
+import {QmcStaticCipher} from "./qmc_cipher";
 import {
-    AudioMimeType,
-    GetArrayBuffer,
-    GetCoverFromFile,
-    GetImageFromURL,
-    GetMetaFromFile,
-    SniffAudioExt, WriteMetaToFlac, WriteMetaToMp3
-} from "@/decrypt/utils.ts";
+  AudioMimeType,
+  GetArrayBuffer,
+  GetCoverFromFile,
+  GetImageFromURL,
+  GetMetaFromFile,
+  SniffAudioExt,
+  WriteMetaToFlac,
+  WriteMetaToMp3
+} from "@/decrypt/utils";
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
+import {DecryptQMCv2} from "./qmcv2";
 
 
 import iconv from "iconv-lite";
 import {DecryptResult} from "@/decrypt/entity";
-import {queryAlbumCover, queryKeyInfo, reportKeyUsage} from "@/utils/api";
+import {queryAlbumCover} from "@/utils/api";
 
 interface Handler {
-    ext: string
-    detect: boolean
-
-    handler(data?: Uint8Array): QmcMask | undefined
+  ext: string
+  version: number
 }
 
 export const HandlerMap: { [key: string]: Handler } = {
-    "mgg": {handler: QmcMaskDetectMgg, ext: "ogg", detect: true},
-    "mflac": {handler: QmcMaskDetectMflac, ext: "flac", detect: true},
-    "mgg.cache": {handler: QmcMaskDetectMgg, ext: "ogg", detect: false},
-    "mflac.cache": {handler: QmcMaskDetectMflac, ext: "flac", detect: false},
-    "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},
-    "666c6163": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
-    "6d7033": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
-    "6f6767": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
-    "6d3461": {handler: QmcMaskGetDefault, ext: "m4a", detect: false},
-    "776176": {handler: QmcMaskGetDefault, ext: "wav", detect: false}
+  "mgg": {ext: "ogg", version: 2},
+  "mgg1": {ext: "ogg", version: 2},
+  "mflac": {ext: "flac", version: 2},
+  "mflac0": {ext: "flac", version: 2},
+
+  // qmcflac / qmcogg:
+  // 有可能是 v2 加密但混用同一个后缀名。
+  "qmcflac": {ext: "flac", version: 2},
+  "qmcogg": {ext: "ogg", version: 2},
+
+  "qmc0": {ext: "mp3", version: 1},
+  "qmc2": {ext: "ogg", version: 1},
+  "qmc3": {ext: "mp3", version: 1},
+  "bkcmp3": {ext: "mp3", version: 1},
+  "bkcflac": {ext: "flac", version: 1},
+  "tkm": {ext: "m4a", version: 1},
+  "666c6163": {ext: "flac", version: 1},
+  "6d7033": {ext: "mp3", version: 1},
+  "6f6767": {ext: "ogg", version: 1},
+  "6d3461": {ext: "m4a", version: 1},
+  "776176": {ext: "wav", version: 1}
 };
 
 export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
-    if (!(raw_ext in HandlerMap)) throw `Qmc cannot handle type: ${raw_ext}`;
-    const handler = HandlerMap[raw_ext];
+  if (!(raw_ext in HandlerMap)) throw `Qmc cannot handle type: ${raw_ext}`;
+  const handler = HandlerMap[raw_ext];
+  let {version} = handler;
 
-    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) seed = await queryKey(keyData, raw_filename, raw_ext);
-        if (!seed) throw raw_ext + "格式仅提供实验性支持";
+  const fileBuffer = await GetArrayBuffer(file);
+  let musicDecoded: Uint8Array | undefined;
+
+  if (version === 2) {
+    const v2Decrypted = await DecryptQMCv2(fileBuffer);
+    // 如果 v2 检测失败，降级到 v1 再尝试一次
+    if (v2Decrypted) {
+      musicDecoded = v2Decrypted;
     } else {
-        audioData = fileData;
-        seed = handler.handler(audioData) as QmcMask;
-        if (!seed) throw raw_ext + "格式仅提供实验性支持";
+      version = 1;
     }
-    let musicDecoded = seed.Decrypt(audioData);
+  }
 
-    const ext = SniffAudioExt(musicDecoded, handler.ext);
-    const mime = AudioMimeType[ext];
+  if (version === 1) {
+    const seed = new QmcStaticCipher();
+    musicDecoded = new Uint8Array(fileBuffer)
+    seed.decrypt(musicDecoded, 0);
+  } else if (!musicDecoded) {
+    throw new Error(`解密失败: ${raw_ext}`);
+  }
 
-    let musicBlob = new Blob([musicDecoded], {type: mime});
+  const ext = SniffAudioExt(musicDecoded, handler.ext);
+  const mime = AudioMimeType[ext];
 
-    const musicMeta = await metaParseBlob(musicBlob);
-    for (let metaIdx in musicMeta.native) {
-        if (!musicMeta.native.hasOwnProperty(metaIdx)) continue
-        if (musicMeta.native[metaIdx].some(item => item.id === "TCON" && item.value === "(12)")) {
-            console.warn("try using gbk encoding to decode meta")
-            musicMeta.common.artist = iconv.decode(new Buffer(musicMeta.common.artist ?? ""), "gbk");
-            musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ""), "gbk");
-            musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ""), "gbk");
+  let musicBlob = new Blob([musicDecoded], {type: mime});
+
+  const musicMeta = await metaParseBlob(musicBlob);
+  for (let metaIdx in musicMeta.native) {
+    if (!musicMeta.native.hasOwnProperty(metaIdx)) continue
+    if (musicMeta.native[metaIdx].some(item => item.id === "TCON" && item.value === "(12)")) {
+      console.warn("try using gbk encoding to decode meta")
+      musicMeta.common.artist = iconv.decode(new Buffer(musicMeta.common.artist ?? ""), "gbk");
+      musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ""), "gbk");
+      musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ""), "gbk");
+    }
+  }
+
+  const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist)
+
+  let imgUrl = GetCoverFromFile(musicMeta);
+  if (!imgUrl) {
+    imgUrl = await getCoverImage(info.title, info.artist, musicMeta.common.album);
+    if (imgUrl) {
+      const imageInfo = await GetImageFromURL(imgUrl);
+      if (imageInfo) {
+        imgUrl = imageInfo.url
+        try {
+          const newMeta = {picture: imageInfo.buffer, title: info.title, artists: info.artist?.split(" _ ")}
+          if (ext === "mp3") {
+            musicDecoded = WriteMetaToMp3(Buffer.from(musicDecoded), newMeta, musicMeta)
+            musicBlob = new Blob([musicDecoded], {type: mime});
+          } else if (ext === 'flac') {
+            musicDecoded = WriteMetaToFlac(Buffer.from(musicDecoded), newMeta, musicMeta)
+            musicBlob = new Blob([musicDecoded], {type: mime});
+          } else {
+            console.info("writing metadata for " + ext + " is not being supported for now")
+          }
+        } catch (e) {
+          console.warn("Error while appending cover image to file " + e)
         }
+      }
     }
-
-    const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist)
-    if (keyData) reportKeyUsage(keyData, seed.getMatrix128(),
-        raw_filename, raw_ext, info.title, info.artist, musicMeta.common.album).then().catch();
-
-    let imgUrl = GetCoverFromFile(musicMeta);
-    if (!imgUrl) {
-        imgUrl = await getCoverImage(info.title, info.artist, musicMeta.common.album);
-        if (imgUrl) {
-            const imageInfo = await GetImageFromURL(imgUrl);
-            if (imageInfo) {
-                imgUrl = imageInfo.url
-                try {
-                    const newMeta = {picture: imageInfo.buffer, title: info.title, artists: info.artist?.split(" _ ")}
-                    if (ext === "mp3") {
-                        musicDecoded = WriteMetaToMp3(Buffer.from(musicDecoded), newMeta, musicMeta)
-                        musicBlob = new Blob([musicDecoded], {type: mime});
-                    } else if (ext === 'flac') {
-                        musicDecoded = WriteMetaToFlac(Buffer.from(musicDecoded), newMeta, musicMeta)
-                        musicBlob = new Blob([musicDecoded], {type: mime});
-                    } else {
-                        console.info("writing metadata for " + ext + " is not being supported for now")
-                    }
-                } catch (e) {
-                    console.warn("Error while appending cover image to file " + e)
-                }
-            }
-        }
-    }
-    return {
-        title: info.title,
-        artist: info.artist,
-        ext: ext,
-        album: musicMeta.common.album,
-        picture: imgUrl,
-        file: URL.createObjectURL(musicBlob),
-        blob: musicBlob,
-        mime: mime
-    }
+  }
+  return {
+    title: info.title,
+    artist: info.artist,
+    ext: ext,
+    album: musicMeta.common.album,
+    picture: imgUrl,
+    file: URL.createObjectURL(musicBlob),
+    blob: musicBlob,
+    mime: mime
+  }
 }
 
 
-async function queryKey(keyData: Uint8Array, filename: string, format: string): Promise<QmcMask | undefined> {
-    try {
-        const data = await queryKeyInfo(keyData, filename, format)
-        return new QmcMask(Base64Decode(data.Matrix44));
-    } catch (e) {
-        console.warn(e);
-    }
-}
-
 async function getCoverImage(title: string, artist?: string, album?: string): Promise<string> {
-    const song_query_url = "https://stats.ixarea.com/apis" + "/music/qq-cover"
-    try {
-        const data = await queryAlbumCover(title, artist, album)
-        return `${song_query_url}/${data.Type}/${data.Id}`
-    } catch (e) {
-        console.warn(e);
-    }
-    return ""
+  const song_query_url = "https://stats.ixarea.com/apis" + "/music/qq-cover"
+  try {
+    const data = await queryAlbumCover(title, artist, album)
+    return `${song_query_url}/${data.Type}/${data.Id}`
+  } catch (e) {
+    console.warn(e);
+  }
+  return ""
 }

src/decrypt/qmcMask.ts

@@ -1,206 +0,0 @@
-import {BytesHasPrefix, FLAC_HEADER, OGG_HEADER} from "@/decrypt/utils.ts";
-
-const QMOggPublicHeader1 = [
-    0x4f, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
-    0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x1e, 0x01, 0x76, 0x6f, 0x72,
-    0x62, 0x69, 0x73, 0x00, 0x00, 0x00, 0x00, 0x02, 0x44, 0xac, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0xee, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0x01, 0x4f, 0x67, 0x67, 0x53, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00,
-    0xff, 0xff, 0xff, 0xff];
-const QMOggPublicHeader2 = [
-    0x03, 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73, 0x2c, 0x00, 0x00, 0x00, 0x58, 0x69, 0x70, 0x68, 0x2e,
-    0x4f, 0x72, 0x67, 0x20, 0x6c, 0x69, 0x62, 0x56, 0x6f, 0x72, 0x62, 0x69, 0x73, 0x20, 0x49, 0x20,
-    0x32, 0x30, 0x31, 0x35, 0x30, 0x31, 0x30, 0x35, 0x20, 0x28, 0xe2, 0x9b, 0x84, 0xe2, 0x9b, 0x84,
-    0xe2, 0x9b, 0x84, 0xe2, 0x9b, 0x84, 0x29, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x54,
-    0x49, 0x54, 0x4c, 0x45, 0x3d];
-const QMOggPublicConf1 = [
-    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 0,
-    0, 0, 9, 9, 9, 9, 0, 0, 0, 0, 9, 9, 9, 9, 9, 9,
-    9, 9, 9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 6, 6, 6, 6,
-    3, 3, 3, 3, 6, 6, 6, 6, 6, 9, 9, 9, 9, 9, 9, 9,
-    9, 9, 9, 9, 9, 9, 9, 9, 0, 0, 0, 0, 9, 9, 9, 9,
-    0, 0, 0, 0];
-const QMOggPublicConf2 = [
-    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-    3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-    3, 3, 3, 3, 3, 3, 3, 0, 1, 3, 3, 0, 1, 3, 3, 3,
-    3, 3, 3, 3, 3];
-const QMCDefaultMaskMatrix = [
-    0xde, 0x51, 0xfa, 0xc3, 0x4a, 0xd6, 0xca, 0x90,
-    0x7e, 0x67, 0x5e, 0xf7, 0xd5, 0x52, 0x84, 0xd8,
-    0x47, 0x95, 0xbb, 0xa1, 0xaa, 0xc6, 0x66, 0x23,
-    0x92, 0x62, 0xf3, 0x74, 0xa1, 0x9f, 0xf4, 0xa0,
-    0x1d, 0x3f, 0x5b, 0xf0, 0x13, 0x0e, 0x09, 0x3d,
-    0xf9, 0xbc, 0x00, 0x11];
-
-
-const AllMapping: number[][] = [];
-const Mask128to44: number[] = [];
-
-(function () {
-    for (let i = 0; i < 128; i++) {
-        let realIdx = (i * i + 27) % 256
-        if (realIdx in AllMapping) {
-            AllMapping[realIdx].push(i)
-        } else {
-            AllMapping[realIdx] = [i]
-        }
-    }
-
-    let idx44 = 0
-    AllMapping.forEach(all128 => {
-        all128.forEach(_i128 => {
-            Mask128to44[_i128] = idx44
-        })
-        idx44++
-    })
-})();
-
-
-export class QmcMask {
-    private readonly Matrix128: number[];
-
-    constructor(matrix: number[] | Uint8Array) {
-        if (matrix instanceof Uint8Array) matrix = Array.from(matrix)
-        if (matrix.length === 44) {
-            this.Matrix128 = this._generate128(matrix)
-        } else if (matrix.length === 128) {
-            this.Matrix128 = matrix
-        } else {
-            throw Error("invalid mask length")
-        }
-    }
-
-    getMatrix128() {
-        return this.Matrix128
-    }
-
-    getMatrix44(): number[] {
-        const matrix44: number[] = []
-        let idxI44 = 0
-        AllMapping.forEach(it256 => {
-            let it256Len = it256.length
-            for (let i = 1; i < it256Len; i++) {
-                if (this.Matrix128[it256[0]] !== this.Matrix128[it256[i]]) {
-                    throw "decode mask-128 to mask-44 failed"
-                }
-            }
-            matrix44[idxI44] = this.Matrix128[it256[0]]
-            idxI44++
-        })
-        return matrix44
-    }
-
-    Decrypt(data: Uint8Array) {
-        if (!this.Matrix128) throw Error("bad call sequence")
-        let dst = data.slice(0);
-        let index = -1;
-        let maskIdx = -1;
-        for (let cur = 0; cur < data.length; cur++) {
-            index++;
-            maskIdx++;
-            if (index === 0x8000 || (index > 0x8000 && (index + 1) % 0x8000 === 0)) {
-                index++;
-                maskIdx++;
-            }
-            if (maskIdx >= 128) maskIdx -= 128;
-            dst[cur] ^= this.Matrix128[maskIdx];
-        }
-        return dst;
-    }
-
-    private _generate128(matrix44: number[]): number[] {
-        const matrix128: number[] = []
-        let idx44 = 0
-        AllMapping.forEach(it256 => {
-            it256.forEach(m => {
-                matrix128[m] = matrix44[idx44]
-            })
-            idx44++
-        })
-        return matrix128
-    }
-}
-
-export function QmcMaskGetDefault() {
-    return new QmcMask(QMCDefaultMaskMatrix)
-}
-
-export function QmcMaskDetectMflac(data: Uint8Array) {
-    let search_len = Math.min(0x8000, data.length), mask;
-    for (let block_idx = 0; block_idx < search_len; block_idx += 128) {
-        try {
-            mask = new QmcMask(data.slice(block_idx, block_idx + 128));
-            if (BytesHasPrefix(mask.Decrypt(data.slice(0, FLAC_HEADER.length)), FLAC_HEADER)) {
-                break;
-            }
-        } catch (e) {
-        }
-    }
-    return mask;
-}
-
-export function QmcMaskDetectMgg(data: Uint8Array) {
-    if (data.length < 0x100) return
-    let matrixConfidence: { [key: number]: { [key: number]: number } } = {};
-    for (let i = 0; i < 44; i++) matrixConfidence[i] = {};
-
-    const page2 = data[0x54] ^ data[0xC] ^ QMOggPublicHeader1[0xC];
-    const spHeader = QmcGenerateOggHeader(page2)
-    const spConf = QmcGenerateOggConf(page2)
-
-    for (let idx128 = 0; idx128 < spHeader.length; idx128++) {
-        if (spConf[idx128] === 0) continue;
-        let idx44 = Mask128to44[idx128 % 128];
-        let _m = data[idx128] ^ spHeader[idx128]
-        let confidence = spConf[idx128];
-        if (_m in matrixConfidence[idx44]) {
-            matrixConfidence[idx44][_m] += confidence
-        } else {
-            matrixConfidence[idx44][_m] = confidence
-        }
-    }
-    let matrix = [];
-    try {
-        for (let i = 0; i < 44; i++)
-            matrix[i] = calcMaskFromConfidence(matrixConfidence[i]);
-    } catch (e) {
-        return;
-    }
-    const mask = new QmcMask(matrix);
-    if (!BytesHasPrefix(mask.Decrypt(data.slice(0, OGG_HEADER.length)), OGG_HEADER)) {
-        return;
-    }
-    return mask;
-}
-
-
-function calcMaskFromConfidence(confidence: { [key: number]: number }) {
-    const count = Object.keys(confidence).length
-    if (count === 0) throw "can not match at least one key";
-    if (count > 1) console.warn("There are 2 potential value for the mask!")
-    let result = ""
-    let conf = 0
-    for (let idx in confidence) {
-        if (confidence[idx] > conf) {
-            result = idx;
-            conf = confidence[idx];
-        }
-    }
-    return Number(result)
-}
-
-function QmcGenerateOggHeader(page2: number) {
-    let spec = [page2, 0xFF]
-    for (let i = 2; i < page2; i++) spec.push(0xFF)
-    spec.push(0xFF)
-    return QMOggPublicHeader1.concat(spec, QMOggPublicHeader2)
-}
-
-function QmcGenerateOggConf(page2: number) {
-    let specConf = [6, 0]
-    for (let i = 2; i < page2; i++) specConf.push(4)
-    specConf.push(0)
-    return QMOggPublicConf1.concat(specConf, QMOggPublicConf2)
-}

src/decrypt/qmc_cipher.test.ts

@@ -0,0 +1,27 @@
+import {QmcStaticCipher} from "@/decrypt/qmc_cipher";
+
+test("static cipher [0x7ff8,0x8000) ", () => {
+  const expected = new Uint8Array([
+    0xD8, 0x52, 0xF7, 0x67, 0x90, 0xCA, 0xD6, 0x4A,
+    0x4A, 0xD6, 0xCA, 0x90, 0x67, 0xF7, 0x52, 0xD8,
+  ])
+
+  const c = new QmcStaticCipher()
+  const buf = new Uint8Array(16)
+  c.decrypt(buf, 0x7ff8)
+
+  expect(buf).toStrictEqual(expected)
+})
+
+test("static cipher [0,0x10) ", () => {
+  const expected = new Uint8Array([
+    0xC3, 0x4A, 0xD6, 0xCA, 0x90, 0x67, 0xF7, 0x52,
+    0xD8, 0xA1, 0x66, 0x62, 0x9F, 0x5B, 0x09, 0x00,
+  ])
+
+  const c = new QmcStaticCipher()
+  const buf = new Uint8Array(16)
+  c.decrypt(buf, 0)
+
+  expect(buf).toStrictEqual(expected)
+})

src/decrypt/qmc_cipher.ts

@@ -0,0 +1,53 @@
+const staticCipherBox = new Uint8Array([
+  0x77, 0x48, 0x32, 0x73, 0xDE, 0xF2, 0xC0, 0xC8, //0x00
+  0x95, 0xEC, 0x30, 0xB2, 0x51, 0xC3, 0xE1, 0xA0, //0x08
+  0x9E, 0xE6, 0x9D, 0xCF, 0xFA, 0x7F, 0x14, 0xD1, //0x10
+  0xCE, 0xB8, 0xDC, 0xC3, 0x4A, 0x67, 0x93, 0xD6, //0x18
+  0x28, 0xC2, 0x91, 0x70, 0xCA, 0x8D, 0xA2, 0xA4, //0x20
+  0xF0, 0x08, 0x61, 0x90, 0x7E, 0x6F, 0xA2, 0xE0, //0x28
+  0xEB, 0xAE, 0x3E, 0xB6, 0x67, 0xC7, 0x92, 0xF4, //0x30
+  0x91, 0xB5, 0xF6, 0x6C, 0x5E, 0x84, 0x40, 0xF7, //0x38
+  0xF3, 0x1B, 0x02, 0x7F, 0xD5, 0xAB, 0x41, 0x89, //0x40
+  0x28, 0xF4, 0x25, 0xCC, 0x52, 0x11, 0xAD, 0x43, //0x48
+  0x68, 0xA6, 0x41, 0x8B, 0x84, 0xB5, 0xFF, 0x2C, //0x50
+  0x92, 0x4A, 0x26, 0xD8, 0x47, 0x6A, 0x7C, 0x95, //0x58
+  0x61, 0xCC, 0xE6, 0xCB, 0xBB, 0x3F, 0x47, 0x58, //0x60
+  0x89, 0x75, 0xC3, 0x75, 0xA1, 0xD9, 0xAF, 0xCC, //0x68
+  0x08, 0x73, 0x17, 0xDC, 0xAA, 0x9A, 0xA2, 0x16, //0x70
+  0x41, 0xD8, 0xA2, 0x06, 0xC6, 0x8B, 0xFC, 0x66, //0x78
+  0x34, 0x9F, 0xCF, 0x18, 0x23, 0xA0, 0x0A, 0x74, //0x80
+  0xE7, 0x2B, 0x27, 0x70, 0x92, 0xE9, 0xAF, 0x37, //0x88
+  0xE6, 0x8C, 0xA7, 0xBC, 0x62, 0x65, 0x9C, 0xC2, //0x90
+  0x08, 0xC9, 0x88, 0xB3, 0xF3, 0x43, 0xAC, 0x74, //0x98
+  0x2C, 0x0F, 0xD4, 0xAF, 0xA1, 0xC3, 0x01, 0x64, //0xA0
+  0x95, 0x4E, 0x48, 0x9F, 0xF4, 0x35, 0x78, 0x95, //0xA8
+  0x7A, 0x39, 0xD6, 0x6A, 0xA0, 0x6D, 0x40, 0xE8, //0xB0
+  0x4F, 0xA8, 0xEF, 0x11, 0x1D, 0xF3, 0x1B, 0x3F, //0xB8
+  0x3F, 0x07, 0xDD, 0x6F, 0x5B, 0x19, 0x30, 0x19, //0xC0
+  0xFB, 0xEF, 0x0E, 0x37, 0xF0, 0x0E, 0xCD, 0x16, //0xC8
+  0x49, 0xFE, 0x53, 0x47, 0x13, 0x1A, 0xBD, 0xA4, //0xD0
+  0xF1, 0x40, 0x19, 0x60, 0x0E, 0xED, 0x68, 0x09, //0xD8
+  0x06, 0x5F, 0x4D, 0xCF, 0x3D, 0x1A, 0xFE, 0x20, //0xE0
+  0x77, 0xE4, 0xD9, 0xDA, 0xF9, 0xA4, 0x2B, 0x76, //0xE8
+  0x1C, 0x71, 0xDB, 0x00, 0xBC, 0xFD, 0x0C, 0x6C, //0xF0
+  0xA5, 0x47, 0xF7, 0xF6, 0x00, 0x79, 0x4A, 0x11, //0xF8
+])
+
+interface streamCipher {
+  decrypt(buf: Uint8Array, offset: number): void
+}
+
+export class QmcStaticCipher implements streamCipher {
+
+  public getMask(offset: number) {
+    if (offset > 0x7FFF) offset %= 0x7FFF
+    return staticCipherBox[(offset * offset + 27) & 0xff]
+  }
+
+  public decrypt(buf: Uint8Array, offset: number) {
+    for (let i = 0; i < buf.length; i++) {
+      buf[i] ^= this.getMask(offset + i)
+    }
+  }
+}
+

src/decrypt/qmccache.ts

@@ -5,7 +5,7 @@ import {
     GetMetaFromFile,
     SniffAudioExt,
     SplitFilename
-} from "@/decrypt/utils.ts";
+} from "@/decrypt/utils";
 
 import {Decrypt as QmcDecrypt, HandlerMap} from "@/decrypt/qmc";
 

src/decrypt/qmcv2.ts

@@ -0,0 +1,102 @@
+import QMCCryptoModule from '@jixun/qmc2-crypto/QMC2-wasm-bundle';
+
+// 检测文件末端使用的缓冲区大小
+const DETECTION_SIZE = 40;
+
+// 每次处理 2M 的数据
+const DECRYPTION_BUF_SIZE = 2 * 1024 * 1024;
+
+function MergeUint8Array(array: Uint8Array[]): Uint8Array {
+  let length = 0;
+  array.forEach(item => {
+    length += item.length;
+  });
+
+  let mergedArray = new Uint8Array(length);
+  let offset = 0;
+  array.forEach(item => {
+    mergedArray.set(item, offset);
+    offset += item.length;
+  });
+
+  return mergedArray;
+}
+
+/**
+ * 解密一个 QMC2 加密的文件。
+ *
+ * 如果检测并解密成功，返回解密后的 Uint8Array 数据。
+ * @param  {ArrayBuffer} mggBlob 读入的文件 Blob
+ * @return {Promise<Uint8Array|false>}
+ */
+export async function DecryptQMCv2(mggBlob: ArrayBuffer) {
+  // 初始化模组
+  const QMCCrypto = await QMCCryptoModule();
+
+  // 申请内存块，并文件末端数据到 WASM 的内存堆
+  const detectionBuf = new Uint8Array(mggBlob.slice(-DETECTION_SIZE));
+  const pDetectionBuf = QMCCrypto._malloc(detectionBuf.length);
+  QMCCrypto.writeArrayToMemory(detectionBuf, pDetectionBuf);
+
+  // 检测结果内存块
+  const pDetectionResult = QMCCrypto._malloc(QMCCrypto.sizeof_qmc_detection());
+
+  // 进行检测
+  const detectOK = QMCCrypto.detectKeyEndPosition(
+    pDetectionResult,
+    pDetectionBuf,
+    detectionBuf.length
+  );
+
+  // 提取结构体内容：
+  // (pos: i32; len: i32; error: char[??])
+  const position = QMCCrypto.getValue(pDetectionResult, "i32");
+  const len = QMCCrypto.getValue(pDetectionResult + 4, "i32");
+
+  // 释放内存
+  QMCCrypto._free(pDetectionBuf);
+  QMCCrypto._free(pDetectionResult);
+
+  if (!detectOK) {
+    return false;
+  }
+
+  // 计算解密后文件的大小。
+  // 之前得到的 position 为相对当前检测数据起点的偏移。
+  const decryptedSize = mggBlob.byteLength - DETECTION_SIZE + position;
+
+  // 提取嵌入到文件的 EKey
+  const ekey = new Uint8Array(
+    mggBlob.slice(decryptedSize, decryptedSize + len)
+  );
+
+  // 解码 UTF-8 数据到 string
+  const decoder = new TextDecoder();
+  const ekey_b64 = decoder.decode(ekey);
+
+  // 初始化加密与缓冲区
+  const hCrypto = QMCCrypto.createInstWidthEKey(ekey_b64);
+  const buf = QMCCrypto._malloc(DECRYPTION_BUF_SIZE);
+
+  const decryptedParts = [];
+  let offset = 0;
+  let bytesToDecrypt = decryptedSize;
+  while (bytesToDecrypt > 0) {
+    const blockSize = Math.min(bytesToDecrypt, DECRYPTION_BUF_SIZE);
+
+    // 解密一些片段
+    const blockData = new Uint8Array(
+      mggBlob.slice(offset, offset + blockSize)
+    );
+    QMCCrypto.writeArrayToMemory(blockData, buf);
+    QMCCrypto.decryptStream(hCrypto, buf, offset, blockSize);
+    decryptedParts.push(QMCCrypto.HEAPU8.slice(buf, buf + blockSize));
+
+    offset += blockSize;
+    bytesToDecrypt -= blockSize;
+  }
+  QMCCrypto._free(buf);
+  hCrypto.delete();
+
+  return MergeUint8Array(decryptedParts);
+}

src/decrypt/raw.ts

@@ -1,4 +1,4 @@
-import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils.ts";
+import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils";
 
 import {DecryptResult} from "@/decrypt/entity";
 

src/decrypt/tm.ts

@@ -1,5 +1,5 @@
 import {Decrypt as RawDecrypt} from "./raw";
-import {GetArrayBuffer} from "@/decrypt/utils.ts";
+import {GetArrayBuffer} from "@/decrypt/utils";
 import {DecryptResult} from "@/decrypt/entity";
 
 const TM_HEADER = [0x00, 0x00, 0x00, 0x20, 0x66, 0x74, 0x79, 0x70];

src/decrypt/xm.ts

@@ -1,6 +1,6 @@
 import {Decrypt as RawDecrypt} from "@/decrypt/raw";
 import {DecryptResult} from "@/decrypt/entity";
-import {AudioMimeType, BytesHasPrefix, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile} from "@/decrypt/utils.ts";
+import {AudioMimeType, BytesHasPrefix, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile} from "@/decrypt/utils";
 
 import {parseBlob as metaParseBlob} from "music-metadata-browser";
 

src/fix-compatibility.js

@@ -1,25 +0,0 @@
-//TODO: Use other method to fix this
-// !! Only Temporary Solution
-// it seems like that @babel/plugin-proposal-object-rest-spread not working
-// to fix up the compatibility for Edge 18 and some older Chromium
-// now manually edit the dependency files
-
-const fs = require('fs');
-const filePath = "./node_modules/file-type/core.js";
-const regReplace = /{\s*([a-zA-Z0-9:,\s]*),\s*\.\.\.([a-zA-Z0-9]*)\s*};/m;
-if (fs.existsSync(filePath)) {
-    console.log("File Found!");
-    let data = fs.readFileSync(filePath).toString();
-    const regResult = regReplace.exec(data);
-    if (regResult != null) {
-        data = data.replace(regResult[0],
-            "Object.assign({ " + regResult[1] + " }, " + regResult[2] + ");"
-        );
-        fs.writeFileSync(filePath, data);
-        console.log("Object rest spread in file-type fixed!");
-    } else {
-        console.log("No fix needed.");
-    }
-} else {
-    console.log("File Not Found!");
-}

tsconfig.json

@@ -14,7 +14,8 @@
     "sourceMap": true,
     "baseUrl": ".",
     "types": [
-      "webpack-env"
+      "webpack-env",
+      "jest"
     ],
     "paths": {
       "@/*": [