feat: add basic joox support

src/decrypt/common.ts

@@ -5,6 +5,7 @@ import { Decrypt as KgmDecrypt } from '@/decrypt/kgm';
 import { Decrypt as KwmDecrypt } from '@/decrypt/kwm';
 import { Decrypt as RawDecrypt } from '@/decrypt/raw';
 import { Decrypt as TmDecrypt } from '@/decrypt/tm';
+import { Decrypt as JooxDecrypt } from '@/decrypt/joox';
 import { DecryptResult, FileInfo } from '@/decrypt/entity';
 import { SplitFilename } from '@/decrypt/utils';
 
@@ -60,6 +61,9 @@ export async function CommonDecrypt(file: FileInfo): Promise<DecryptResult> {
     case 'kgma':
       rt_data = await KgmDecrypt(file.raw, raw.name, raw.ext);
       break;
+    case 'ofl_en':
+      rt_data = await JooxDecrypt(file.raw, raw.name, raw.ext);
+      break;
     default:
       throw '不支持此文件格式';
   }

src/decrypt/joox.ts

@@ -0,0 +1,34 @@
+import { DecryptResult } from './entity';
+import { AudioMimeType, GetArrayBuffer, SniffAudioExt } from './utils';
+
+import jooxFactory from '@unlock-music-gh/joox-crypto';
+import storage from '@/utils/storage';
+import { MergeUint8Array } from '@/utils/MergeUint8Array';
+
+export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
+  const uuid = await storage.loadJooxUUID('');
+  if (!uuid || uuid.length !== 32) {
+    throw new Error('请在“解密设定”填写应用 Joox 应用的 UUID。');
+  }
+
+  const fileBuffer = new Uint8Array(await GetArrayBuffer(file));
+  const decryptor = jooxFactory(fileBuffer, uuid);
+  if (!decryptor) {
+    throw new Error('不支持的 joox 加密格式');
+  }
+
+  const musicDecoded = MergeUint8Array(decryptor.decryptFile(fileBuffer));
+  const ext = SniffAudioExt(musicDecoded);
+  const mime = AudioMimeType[ext];
+  const musicBlob = new Blob([musicDecoded], { type: mime });
+
+  return {
+    title: raw_filename.replace(/\.[^\.]+$/, ''),
+    artist: '未知',
+    album: '未知',
+    file: URL.createObjectURL(musicBlob),
+    blob: musicBlob,
+    mime: mime,
+    ext: ext,
+  };
+}

src/decrypt/qmc_wasm.ts

@@ -1,4 +1,5 @@
 import QMCCryptoModule from '@jixun/qmc2-crypto/QMC2-wasm-bundle';
+import { MergeUint8Array } from '@/utils/MergeUint8Array';
 
 // 检测文件末端使用的缓冲区大小
 const DETECTION_SIZE = 40;
@@ -6,22 +7,6 @@ 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。
  *