maintenance: update ci

feat(QMC): use static cipher instead of mask

.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
@@ -18,4 +18,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

README.md

@@ -22,8 +22,6 @@
 - [x] QQ音乐新格式 (实验性支持)
   - [x] .mflac
   - [x] [.mgg](https://github.com/ix64/unlock-music/issues/3)
-- [x] 网易云音乐格式 (.ncm)
-  - [x] 补全ncm的ID3/FlacMeta信息
 - [x] 虾米音乐格式 (.xm) (测试阶段)
 - [x] 酷我音乐格式 (.kwm) (测试阶段)
 - [x] 酷狗音乐格式 (

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": "v1.9.1",
+  "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",
@@ -32,16 +35,19 @@
   },
   "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",
+    "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

public/index.html

@@ -6,7 +6,7 @@
     <meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
     <meta content="width=device-width,initial-scale=1.0" name="viewport">
     <title>音乐解锁</title>
-    <meta content="音乐,解锁,ncm,qmc,mgg,mflac,qq音乐,网易云音乐,加密" name="keywords"/>
+    <meta content="音乐,解锁,qmc,mgg,mflac,qq音乐,加密" name="keywords"/>
     <meta content="音乐解锁 - 在任何设备上解锁已购的加密音乐！" name="description"/>
     <script src="./ixarea-stats.js"></script>
     <!--@formatter:off-->

src/App.vue

@@ -10,7 +10,7 @@
                 <a href="https://github.com/ix64/unlock-music/wiki/使用提示" target="_blank">使用提示</a>
             </el-row>
             <el-row>
-                目前支持网易云音乐(ncm), QQ音乐(qmc, mflac, mgg), 酷狗音乐(kgm), 虾米音乐(xm), 酷我音乐(.kwm)
+                目前支持 QQ音乐(qmc, mflac, mgg), 酷狗音乐(kgm), 虾米音乐(xm), 酷我音乐(.kwm)
                 <a href="https://github.com/ix64/unlock-music/blob/master/README.md" target="_blank">更多</a>。
             </el-row>
             <el-row>

src/decrypt/common.ts

@@ -1,5 +1,3 @@
-import {Decrypt as NcmDecrypt} from "@/decrypt/ncm";
-import {Decrypt as NcmCacheDecrypt} from "@/decrypt/ncmcache";
 import {Decrypt as XmDecrypt} from "@/decrypt/xm";
 import {Decrypt as QmcDecrypt} from "@/decrypt/qmc";
 import {Decrypt as QmcCacheDecrypt} from "@/decrypt/qmccache";
@@ -15,12 +13,6 @@ export async function CommonDecrypt(file: FileInfo): Promise<DecryptResult> {
     const raw = SplitFilename(file.name)
     let rt_data: DecryptResult;
     switch (raw.ext) {
-        case "ncm":// Netease Mp3/Flac
-            rt_data = await NcmDecrypt(file.raw, raw.name, raw.ext);
-            break;
-        case "uc":// Netease Cache
-            rt_data = await NcmCacheDecrypt(file.raw, raw.name, raw.ext);
-            break;
         case "kwm":// Kuwo Mp3/Flac
             rt_data = await KwmDecrypt(file.raw, raw.name, raw.ext);
             break
@@ -46,8 +38,10 @@ 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

@@ -1,243 +0,0 @@
-import {
-    AudioMimeType,
-    BytesHasPrefix,
-    GetArrayBuffer,
-    GetImageFromURL,
-    GetMetaFromFile, IMusicMeta,
-    SniffAudioExt,
-    WriteMetaToFlac,
-    WriteMetaToMp3
-} from "@/decrypt/utils.ts";
-import {parseBlob as metaParseBlob} from "music-metadata-browser";
-import jimp from 'jimp';
-
-import AES from "crypto-js/aes";
-import PKCS7 from "crypto-js/pad-pkcs7";
-import ModeECB from "crypto-js/mode-ecb";
-import WordArray from "crypto-js/lib-typedarrays";
-import Base64 from "crypto-js/enc-base64";
-import EncUTF8 from "crypto-js/enc-utf8";
-import EncHex from "crypto-js/enc-hex";
-
-import {DecryptResult} from "@/decrypt/entity";
-
-const CORE_KEY = EncHex.parse("687a4852416d736f356b496e62617857");
-const META_KEY = EncHex.parse("2331346C6A6B5F215C5D2630553C2728");
-const MagicHeader = [0x43, 0x54, 0x45, 0x4E, 0x46, 0x44, 0x41, 0x4D];
-
-
-export async function Decrypt(file: File, raw_filename: string, _: string): Promise<DecryptResult> {
-    return (new NcmDecrypt(await GetArrayBuffer(file), raw_filename)).decrypt()
-}
-
-
-interface NcmMusicMeta {
-    //musicId: number
-    musicName?: string
-    artist?: Array<string | number>[]
-    format?: string
-    album?: string
-    albumPic?: string
-}
-
-interface NcmDjMeta {
-    mainMusic: NcmMusicMeta
-}
-
-
-class NcmDecrypt {
-    raw: ArrayBuffer
-    view: DataView
-    offset: number = 0
-    filename: string
-    format: string = ""
-    mime: string = ""
-    audio?: Uint8Array
-    blob?: Blob
-    oriMeta?: NcmMusicMeta
-    newMeta?: IMusicMeta
-    image?: { mime: string, buffer: ArrayBuffer, url: string }
-
-    constructor(buf: ArrayBuffer, filename: string) {
-        const prefix = new Uint8Array(buf, 0, 8)
-        if (!BytesHasPrefix(prefix, MagicHeader)) throw Error("此ncm文件已损坏")
-        this.offset = 10
-        this.raw = buf
-        this.view = new DataView(buf)
-        this.filename = filename
-    }
-
-    _getKeyData(): Uint8Array {
-        const keyLen = this.view.getUint32(this.offset, true);
-        this.offset += 4;
-        const cipherText = new Uint8Array(this.raw, this.offset, keyLen)
-            .map(uint8 => uint8 ^ 0x64);
-        this.offset += keyLen;
-
-        const plainText = AES.decrypt(
-            // @ts-ignore
-            {ciphertext: WordArray.create(cipherText)},
-            CORE_KEY,
-            {mode: ModeECB, padding: PKCS7}
-        );
-
-        const result = new Uint8Array(plainText.sigBytes);
-
-        const words = plainText.words;
-        const sigBytes = plainText.sigBytes;
-        for (let i = 0; i < sigBytes; i++) {
-            result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
-        }
-
-        return result.slice(17)
-    }
-
-    _getKeyBox(): Uint8Array {
-        const keyData = this._getKeyData()
-        const box = new Uint8Array(Array(256).keys());
-
-        const keyDataLen = keyData.length;
-
-        let j = 0;
-
-        for (let i = 0; i < 256; i++) {
-            j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
-            [box[i], box[j]] = [box[j], box[i]];
-        }
-
-        return box.map((_, i, arr) => {
-            i = (i + 1) & 0xff;
-            const si = arr[i];
-            const sj = arr[(i + si) & 0xff];
-            return arr[(si + sj) & 0xff];
-        });
-    }
-
-    _getMetaData(): NcmMusicMeta {
-        const metaDataLen = this.view.getUint32(this.offset, true);
-        this.offset += 4;
-        if (metaDataLen === 0) return {};
-
-        const cipherText = new Uint8Array(this.raw, this.offset, metaDataLen)
-            .map(data => data ^ 0x63);
-        this.offset += metaDataLen;
-
-        WordArray.create()
-        const plainText = AES.decrypt(
-            // @ts-ignore
-            {
-                ciphertext: Base64.parse(
-                    // @ts-ignore
-                    WordArray.create(cipherText.slice(22)).toString(EncUTF8)
-                )
-            },
-            META_KEY,
-            {mode: ModeECB, padding: PKCS7}
-        ).toString(EncUTF8);
-
-        const labelIndex = plainText.indexOf(":");
-        let result: NcmMusicMeta;
-        if (plainText.slice(0, labelIndex) === "dj") {
-            const tmp: NcmDjMeta = JSON.parse(plainText.slice(labelIndex + 1));
-            result = tmp.mainMusic;
-        } else {
-            result = JSON.parse(plainText.slice(labelIndex + 1));
-        }
-        if (!!result.albumPic) {
-            result.albumPic = result.albumPic.replace("http://", "https://") + "?param=500y500"
-        }
-        return result
-    }
-
-    _getAudio(keyBox: Uint8Array): Uint8Array {
-        this.offset += this.view.getUint32(this.offset + 5, true) + 13
-        const audioData = new Uint8Array(this.raw, this.offset)
-        let lenAudioData = audioData.length
-        for (let cur = 0; cur < lenAudioData; ++cur) audioData[cur] ^= keyBox[cur & 0xff]
-        return audioData
-    }
-
-    async _buildMeta() {
-        if (!this.oriMeta) throw Error("invalid sequence")
-
-        const info = GetMetaFromFile(this.filename, this.oriMeta.musicName)
-
-        // build artists
-        let artists: string[] = [];
-        if (!!this.oriMeta.artist) {
-            this.oriMeta.artist.forEach(arr => artists.push(<string>arr[0]));
-        }
-
-        if (artists.length === 0 && !!info.artist) {
-            artists = info.artist.split(',')
-                .map(val => val.trim()).filter(val => val != "");
-        }
-
-        if (this.oriMeta.albumPic) try {
-            this.image = await GetImageFromURL(this.oriMeta.albumPic)
-            while (this.image && this.image.buffer.byteLength >= 1 << 24) {
-                let img = await jimp.read(Buffer.from(this.image.buffer))
-                await img.resize(Math.round(img.getHeight() / 2), jimp.AUTO)
-                this.image.buffer = await img.getBufferAsync("image/jpeg")
-            }
-        } catch (e) {
-            console.log("get cover image failed", e)
-        }
-
-
-        this.newMeta = {title: info.title, artists, album: this.oriMeta.album, picture: this.image?.buffer}
-    }
-
-    async _writeMeta() {
-        if (!this.audio || !this.newMeta) throw Error("invalid sequence")
-
-        if (!this.blob) this.blob = new Blob([this.audio], {type: this.mime})
-        const ori = await metaParseBlob(this.blob);
-
-        let shouldWrite = !ori.common.album && !ori.common.artists && !ori.common.title
-        if (shouldWrite || this.newMeta.picture) {
-            if (this.format === "mp3") {
-                this.audio = WriteMetaToMp3(Buffer.from(this.audio), this.newMeta, ori)
-            } else if (this.format === "flac") {
-                this.audio = WriteMetaToFlac(Buffer.from(this.audio), this.newMeta, ori)
-            } else {
-                console.info(`writing meta for ${this.format} is not being supported for now`)
-                return
-            }
-            this.blob = new Blob([this.audio], {type: this.mime})
-        }
-    }
-
-    gatherResult(): DecryptResult {
-        if (!this.newMeta) throw Error("bad sequence")
-        return {
-            title: this.newMeta.title,
-            artist: this.newMeta.artists?.join("; "),
-            ext: this.format,
-            album: this.newMeta.album,
-            picture: this.image?.url,
-            file: URL.createObjectURL(this.blob),
-            blob: this.blob as Blob,
-            mime: this.mime
-        }
-    }
-
-    async decrypt() {
-        const keyBox = this._getKeyBox()
-        this.oriMeta = this._getMetaData()
-        this.audio = this._getAudio(keyBox)
-        this.format = this.oriMeta.format || SniffAudioExt(this.audio)
-        this.mime = AudioMimeType[this.format]
-        await this._buildMeta()
-        try {
-            await this._writeMeta()
-        } catch (e) {
-            console.warn("write meta data failed", e)
-        }
-        return this.gatherResult()
-    }
-
-
-}
-
-

src/decrypt/ncmcache.ts

@@ -1,29 +0,0 @@
-import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils.ts";
-
-import {DecryptResult} from "@/decrypt/entity";
-
-import {parseBlob as metaParseBlob} from "music-metadata-browser";
-
-export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
-    : Promise<DecryptResult> {
-    const buffer = new Uint8Array(await GetArrayBuffer(file));
-    let length = buffer.length
-    for (let i = 0; i < length; i++) {
-        buffer[i] ^= 163
-    }
-    const ext = SniffAudioExt(buffer, raw_ext);
-    if (ext !== raw_ext) file = new Blob([buffer], {type: AudioMimeType[ext]})
-    const tag = await metaParseBlob(file);
-    const {title, artist} = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist)
-
-    return {
-        title,
-        artist,
-        ext,
-        album: tag.common.album,
-        picture: GetCoverFromFile(tag),
-        file: URL.createObjectURL(file),
-        blob: file,
-        mime: AudioMimeType[ext]
-    }
-}

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)
-    for (let block_idx = 0; block_idx < search_len; block_idx += 128) {
-        try {
-            let mask = new QmcMask(data.slice(block_idx, block_idx + 128));
-            if (BytesHasPrefix(mask.Decrypt(data.slice(0, FLAC_HEADER.length)), FLAC_HEADER)) {
-                return mask
-            }
-        } catch (e) {
-        }
-    }
-    return
-}
-
-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 mask
-    }
-    return
-}
-
-
-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": {
       "@/*": [