package.json

@@ -24,7 +24,7 @@
     "@emotion/styled": "^11.11.0",
     "@reduxjs/toolkit": "^2.0.1",
     "@um/libparakeet": "0.4.5",
-    "@unlock-music/crypto": "0.0.0-alpha.6",
+    "@unlock-music/crypto": "0.0.0-alpha.10",
     "framer-motion": "^10.16.16",
     "nanoid": "^5.0.4",
     "radash": "^11.0.0",

pnpm-lock.yaml

@@ -42,8 +42,8 @@ importers:
         specifier: 0.4.5
         version: 0.4.5
       '@unlock-music/crypto':
-        specifier: 0.0.0-alpha.6
+        specifier: 0.0.0-alpha.10
-        version: 0.0.0-alpha.6
+        version: 0.0.0-alpha.10
       framer-motion:
         specifier: ^10.16.16
         version: 10.16.16(react-dom@18.2.0(react@18.2.0))(react@18.2.0)
@@ -1927,8 +1927,8 @@ packages:
   '@ungap/structured-clone@1.2.0':
     resolution: {integrity: sha512-zuVdFrMJiuCDQUMCzQaD6KL28MjnqqN8XnAqiEq9PNm/hCPTSGfrXCOfwj1ow4LFb/tNymJPwsNbVePc1xFqrQ==}
 
-  '@unlock-music/crypto@0.0.0-alpha.6':
+  '@unlock-music/crypto@0.0.0-alpha.10':
-    resolution: {integrity: sha512-hv1oTXPzsNmqrP5dmjkLa4rfZtd4U/Cu1Bake71QEZhbY1WCbgEX4haCAcXXd6DMGNg/Hv1JXL2TcXNUaqIiFA==, tarball: https://git.unlock-music.dev/api/packages/um/npm/%40unlock-music%2Fcrypto/-/0.0.0-alpha.6/crypto-0.0.0-alpha.6.tgz}
+    resolution: {integrity: sha512-Y8PWd/f4KEh2WU5Uz4QesnYMelDvioLYMOVvpPceMk62P2LivQLgvl5+ytDmD2yzmsnE/sXOQztTg+1WsuePCA==, tarball: https://git.unlock-music.dev/api/packages/um/npm/%40unlock-music%2Fcrypto/-/0.0.0-alpha.10/crypto-0.0.0-alpha.10.tgz}
 
   '@vitejs/plugin-react@4.2.1':
     resolution: {integrity: sha512-oojO9IDc4nCUUi8qIR11KoQm0XFFLIwsRBwHRR4d/88IWghn1y6ckz/bJ8GHDCsYEJee8mDzqtJxh15/cisJNQ==}
@@ -6118,7 +6118,7 @@ snapshots:
 
   '@ungap/structured-clone@1.2.0': {}
 
-  '@unlock-music/crypto@0.0.0-alpha.6': {}
+  '@unlock-music/crypto@0.0.0-alpha.10': {}
 
   '@vitejs/plugin-react@4.2.1(vite@5.0.10(@types/node@20.10.5)(sass@1.69.5)(terser@5.27.0))':
     dependencies:

src/decrypt-worker/Deciphers.ts

@@ -0,0 +1,75 @@
+import { NetEaseCloudMusicDecipher } from '~/decrypt-worker/decipher/NetEaseCloudMusic.ts';
+import { TransparentDecipher } from './decipher/Transparent.ts';
+import type { DecryptCommandOptions } from '~/decrypt-worker/types.ts';
+
+export enum Status {
+  OK = 0,
+  NOT_THIS_CIPHER = 1,
+  FAILED = 2,
+}
+
+export type DecipherResult = DecipherOK | DecipherNotOK;
+
+export interface DecipherNotOK {
+  status: Exclude<Status, Status.OK>;
+  message?: string;
+}
+
+export interface DecipherOK {
+  status: Status.OK;
+  message?: string;
+  data: Uint8Array;
+  overrideExtension?: string;
+  cipherName: string;
+}
+
+export interface DecipherInstance {
+  cipherName: string;
+
+  decrypt(buffer: Uint8Array, options: DecryptCommandOptions): Promise<DecipherResult | DecipherOK>;
+}
+
+export type DecipherFactory = () => DecipherInstance;
+
+export const allCryptoFactories: DecipherFactory[] = [
+  /// File with fixed headers goes first.
+
+  // NCM (*.ncm)
+  NetEaseCloudMusicDecipher.make,
+
+  // KGM (*.kgm, *.vpr)
+  // KGMCrypto.make,
+
+  // KWMv1 (*.kwm)
+  // KWMCrypto.make,
+
+  // Xiami (*.xm)
+  // XiamiCrypto.make,
+
+  /// File with a fixed footer goes second
+
+  // QMCv2 (*.mflac)
+  // QMC2CryptoWithKey.make,
+  // QMC2Crypto.make,
+
+  /// File without an obvious header or footer goes last.
+
+  // Migu3D/Keyless (*.wav; *.m4a)
+  // MiguCrypto.make,
+
+  // Crypto that does not implement "checkBySignature" or need to decrypt the entire file and then check audio type,
+  //   should be moved to the bottom of the list for performance reasons.
+
+  // QMCv1 (*.qmcflac)
+  // QMC1Crypto.make,
+
+  // Ximalaya (Android)
+  // XimalayaAndroidCrypto.makeX2M,
+  // XimalayaAndroidCrypto.makeX3M,
+
+  // QingTingFM (Android)
+  // QingTingFM$Device.make,
+
+  // Transparent crypto (not encrypted)
+  TransparentDecipher.make,
+];

src/decrypt-worker/crypto/CryptoBase.ts

@@ -1,17 +0,0 @@
-import type { DecryptCommandOptions } from '~/decrypt-worker/types';
-
-export interface CryptoBase {
-  cryptoName: string;
-  checkByDecryptHeader: boolean;
-
-  /**
-   * If set, this new extension will be used instead.
-   * Useful for non-audio format, e.g. qrc to lrc/xml.
-   */
-  overrideExtension?: string;
-
-  checkBySignature?: (buffer: ArrayBuffer, options: DecryptCommandOptions) => Promise<boolean>;
-  decrypt(buffer: ArrayBuffer, options: DecryptCommandOptions): Promise<Blob | ArrayBuffer>;
-}
-
-export type CryptoFactory = () => CryptoBase;

src/decrypt-worker/crypto/CryptoFactory.ts

@@ -1,55 +0,0 @@
-import { CryptoFactory } from './CryptoBase';
-
-import { QMC1Crypto } from './qmc/qmc_v1';
-import { QMC2Crypto, QMC2CryptoWithKey } from './qmc/qmc_v2';
-import { XiamiCrypto } from './xiami/xiami';
-import { KGMCrypto } from './kgm/kgm_pc';
-import { NCMCrypto } from './ncm/ncm_pc';
-import { XimalayaAndroidCrypto } from './xmly/xmly_android';
-import { KWMCrypto } from './kwm/kwm';
-import { MiguCrypto } from './migu/migu3d_keyless';
-import { TransparentCrypto } from './transparent/transparent';
-import { QingTingFM$Device } from './qtfm/qtfm_device';
-
-export const allCryptoFactories: CryptoFactory[] = [
-  /// File with fixed headers goes first.
-
-  // NCM (*.ncm)
-  NCMCrypto.make,
-
-  // KGM (*.kgm, *.vpr)
-  KGMCrypto.make,
-
-  // KWMv1 (*.kwm)
-  KWMCrypto.make,
-
-  // Xiami (*.xm)
-  XiamiCrypto.make,
-
-  /// File with a fixed footer goes second
-
-  // QMCv2 (*.mflac)
-  QMC2CryptoWithKey.make,
-  QMC2Crypto.make,
-
-  /// File without an obvious header or footer goes last.
-
-  // Migu3D/Keyless (*.wav; *.m4a)
-  MiguCrypto.make,
-
-  // Crypto that does not implement "checkBySignature" or need to decrypt the entire file and then check audio type,
-  //   should be moved to the bottom of the list for performance reasons.
-
-  // QMCv1 (*.qmcflac)
-  QMC1Crypto.make,
-
-  // Ximalaya (Android)
-  XimalayaAndroidCrypto.makeX2M,
-  XimalayaAndroidCrypto.makeX3M,
-
-  // QingTingFM (Android)
-  QingTingFM$Device.make,
-
-  // Transparent crypto (not encrypted)
-  TransparentCrypto.make,
-];

src/decrypt-worker/crypto/kgm/kgm_pc.ts

@@ -1,14 +1,14 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 import { KGM_SLOT_1_KEY, KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE, KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE } from './kgm_pc.key';
 
-export class KGMCrypto implements CryptoBase {
+export class KGMCrypto implements DecipherInstance {
   cryptoName = 'KGM/PC';
   checkByDecryptHeader = true;
 
   async decrypt(buffer: ArrayBuffer): Promise<Blob> {
     return transformBlob(buffer, (p) =>
-      p.make.KugouKGM(KGM_SLOT_1_KEY, KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE, KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE)
+      p.make.KugouKGM(KGM_SLOT_1_KEY, KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE, KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE),
     );
   }
 

src/decrypt-worker/crypto/kwm/kwm.ts

@@ -1,5 +1,5 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 import { KWM_KEY } from './kwm.key';
 import { DecryptCommandOptions } from '~/decrypt-worker/types';
 import { makeQMCv2KeyCrypto } from '~/decrypt-worker/util/qmc2KeyCrypto';
@@ -7,7 +7,7 @@ import { fetchParakeet } from '@um/libparakeet';
 import { stringToUTF8Bytes } from '~/decrypt-worker/util/utf8Encoder';
 
 // v1 only
-export class KWMCrypto implements CryptoBase {
+export class KWMCrypto implements DecipherInstance {
   cryptoName = 'KWM';
   checkByDecryptHeader = true;
 

src/decrypt-worker/crypto/migu/migu3d_keyless.ts

@@ -1,7 +1,7 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 
-export class MiguCrypto implements CryptoBase {
+export class MiguCrypto implements DecipherInstance {
   cryptoName = 'Migu3D/Keyless';
   checkByDecryptHeader = true;
 

src/decrypt-worker/crypto/ncm/ncm_pc.ts

@@ -1,35 +0,0 @@
-import type { CryptoBase } from '../CryptoBase';
-import { NCMFile } from '@unlock-music/crypto';
-import { chunkBuffer } from '~/decrypt-worker/util/buffer.ts';
-
-export class NCMCrypto implements CryptoBase {
-  cryptoName = 'NCM/PC';
-  checkByDecryptHeader = false;
-  ncm = new NCMFile();
-
-  async checkBySignature(buffer: ArrayBuffer) {
-    const data = new Uint8Array(buffer);
-    let len = 1024;
-    try {
-      while (len !== 0) {
-        console.debug('NCM/open: read %d bytes', len);
-        len = this.ncm.open(data.subarray(0, len));
-      }
-    } catch (error) {
-      return false;
-    }
-    return true;
-  }
-
-  async decrypt(buffer: ArrayBuffer): Promise<Blob> {
-    const audioBuffer = new Uint8Array(buffer.slice(this.ncm.audioOffset));
-    for (const [block, offset] of chunkBuffer(audioBuffer)) {
-      this.ncm.decrypt(block, offset);
-    }
-    return new Blob([audioBuffer]);
-  }
-
-  public static make() {
-    return new NCMCrypto();
-  }
-}

src/decrypt-worker/crypto/qmc/qmc_v1.ts

@@ -1,8 +1,8 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 import key from './qmc_v1.key.ts';
 
-export class QMC1Crypto implements CryptoBase {
+export class QMC1Crypto implements DecipherInstance {
   cryptoName = 'QMC/v1';
   checkByDecryptHeader = true;
 

src/decrypt-worker/crypto/qmc/qmc_v2.ts

@@ -1,11 +1,11 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 import type { DecryptCommandOptions } from '~/decrypt-worker/types.ts';
 import { fetchParakeet } from '@um/libparakeet';
 import { stringToUTF8Bytes } from '~/decrypt-worker/util/utf8Encoder.ts';
 import { makeQMCv2FooterParser, makeQMCv2KeyCrypto } from '~/decrypt-worker/util/qmc2KeyCrypto.ts';
 
-export class QMC2Crypto implements CryptoBase {
+export class QMC2Crypto implements DecipherInstance {
   cryptoName = 'QMC/v2';
   checkByDecryptHeader = false;
 
@@ -23,7 +23,7 @@ export class QMC2Crypto implements CryptoBase {
   }
 }
 
-export class QMC2CryptoWithKey implements CryptoBase {
+export class QMC2CryptoWithKey implements DecipherInstance {
   cryptoName = 'QMC/v2 (key)';
   checkByDecryptHeader = true;
 

src/decrypt-worker/crypto/qtfm/qtfm_device.ts

@@ -1,8 +1,8 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 import { DecryptCommandOptions } from '~/decrypt-worker/types';
 
-export class QingTingFM$Device implements CryptoBase {
+export class QingTingFM$Device implements DecipherInstance {
   cryptoName = 'QingTing FM/Device ID';
   checkByDecryptHeader = false;
 

src/decrypt-worker/crypto/transparent/transparent.ts

@@ -1,14 +0,0 @@
-import type { CryptoBase } from '../CryptoBase';
-
-export class TransparentCrypto implements CryptoBase {
-  cryptoName = 'Transparent';
-  checkByDecryptHeader = true;
-
-  async decrypt(buffer: ArrayBuffer): Promise<Blob> {
-    return new Blob([buffer]);
-  }
-
-  public static make() {
-    return new TransparentCrypto();
-  }
-}

src/decrypt-worker/crypto/xiami/xiami.ts

@@ -9,7 +9,7 @@
 //   0x10  Plaintext data
 //   ????  Encrypted data
 
-import type { CryptoBase } from '../CryptoBase';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 
 // little endian
 const XIAMI_FILE_MAGIC = 0x746d6669;
@@ -23,7 +23,7 @@ const u8Sub = (a: number, b: number) => {
   return a + 0x100 - b;
 };
 
-export class XiamiCrypto implements CryptoBase {
+export class XiamiCrypto implements DecipherInstance {
   cryptoName = 'Xiami';
   checkByDecryptHeader = false;
 

src/decrypt-worker/crypto/xmly/xmly_android.ts

@@ -1,10 +1,11 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
-import type { CryptoBase } from '../CryptoBase.js';
+import type { DecipherInstance } from '~/decrypt-worker/Deciphers.ts';
 import { XimalayaAndroidKey, XimalayaX2MKey, XimalayaX3MKey } from './xmly_android.key.js';
 
-export class XimalayaAndroidCrypto implements CryptoBase {
+export class XimalayaAndroidCrypto implements DecipherInstance {
   cryptoName = 'Ximalaya/Android';
   checkByDecryptHeader = true;
+
   constructor(private key: XimalayaAndroidKey) {}
 
   async decrypt(buffer: ArrayBuffer): Promise<Blob> {

src/decrypt-worker/decipher/NetEaseCloudMusic.ts

@@ -0,0 +1,41 @@
+import { DecipherInstance, DecipherOK, DecipherResult, Status } from '~/decrypt-worker/Deciphers';
+import { NCMFile } from '@unlock-music/crypto';
+import { chunkBuffer } from '~/decrypt-worker/util/buffer.ts';
+import { withWasmClass } from '~/decrypt-worker/util/wasmClass.ts';
+import { UnsupportedSourceFile } from '~/decrypt-worker/util/DecryptError.ts';
+
+export class NetEaseCloudMusicDecipher implements DecipherInstance {
+  cipherName = 'NCM/PC';
+
+  tryInit(ncm: NCMFile, buffer: Uint8Array) {
+    let neededLength = 1024;
+    while (neededLength !== 0) {
+      console.debug('NCM/open: read %d bytes', neededLength);
+      neededLength = ncm.open(buffer.subarray(0, neededLength));
+      if (neededLength === -1) {
+        throw new UnsupportedSourceFile('file is not ncm');
+      }
+    }
+  }
+
+  async decrypt(buffer: ArrayBuffer): Promise<DecipherResult | DecipherOK> {
+    return withWasmClass(new NCMFile(), async (ncm): Promise<DecipherOK> => {
+      const data = new Uint8Array(buffer);
+      this.tryInit(ncm, data);
+
+      const audioBuffer = data.subarray(ncm.audioOffset);
+      for (const [block, offset] of chunkBuffer(audioBuffer)) {
+        ncm.decrypt(block, offset);
+      }
+      return {
+        status: Status.OK,
+        cipherName: this.cipherName,
+        data: audioBuffer,
+      };
+    });
+  }
+
+  public static make() {
+    return new NetEaseCloudMusicDecipher();
+  }
+}

src/decrypt-worker/decipher/Transparent.ts

@@ -0,0 +1,18 @@
+import { DecipherInstance, DecipherOK, DecipherResult, Status } from '~/decrypt-worker/Deciphers.ts';
+
+export class TransparentDecipher implements DecipherInstance {
+  cipherName = 'none';
+
+  async decrypt(buffer: Uint8Array): Promise<DecipherResult | DecipherOK> {
+    return {
+      cipherName: 'None',
+      status: Status.OK,
+      data: buffer,
+      message: 'No decipher applied',
+    };
+  }
+
+  public static make() {
+    return new TransparentDecipher();
+  }
+}

src/decrypt-worker/util/audioType.ts

@@ -0,0 +1,14 @@
+import { detectAudioType } from '@unlock-music/crypto';
+
+export async function detectAudioExtension(buffer: Uint8Array): Promise<string> {
+  let neededLength = 0x100;
+  let extension = 'bin';
+  while (neededLength !== 0) {
+    console.debug('AudioDetect: read %d bytes', neededLength);
+    const detectResult = detectAudioType(buffer.subarray(0, neededLength));
+    extension = detectResult.audioType;
+    neededLength = detectResult.needMore;
+    detectResult.free();
+  }
+  return extension;
+}

src/decrypt-worker/util/wasmClass.ts

@@ -0,0 +1,17 @@
+import { isPromise } from 'radash';
+
+export function withWasmClass<T extends { free: () => void }, R>(instance: T, cb: (inst: T) => R): R {
+  let isAsync = false;
+  try {
+    const resp = cb(instance);
+    if (resp && isPromise(resp)) {
+      isAsync = true;
+      resp.finally(() => instance.free());
+    }
+    return resp;
+  } finally {
+    if (!isAsync) {
+      instance.free();
+    }
+  }
+}

src/decrypt-worker/worker/handler/decrypt.ts

@@ -1,22 +1,19 @@
-import { Parakeet, fetchParakeet } from '@um/libparakeet';
 import { timedLogger, withGroupedLogs as withTimeGroupedLogs } from '~/util/logUtils';
 import type { DecryptCommandOptions, DecryptCommandPayload } from '~/decrypt-worker/types';
-import { allCryptoFactories } from '../../crypto/CryptoFactory';
+import { allCryptoFactories } from '../../Deciphers.ts';
-import { toArrayBuffer, toBlob } from '~/decrypt-worker/util/buffer';
+import { toBlob } from '~/decrypt-worker/util/buffer';
-import { CryptoBase, CryptoFactory } from '~/decrypt-worker/crypto/CryptoBase';
+import { DecipherFactory, DecipherInstance, Status } from '~/decrypt-worker/Deciphers.ts';
 import { UnsupportedSourceFile } from '~/decrypt-worker/util/DecryptError';
 import { ready as umCryptoReady } from '@unlock-music/crypto';
-
+import { go } from '~/util/go.ts';
-// Use first 4MiB of the file to perform check.
+import { detectAudioExtension } from '~/decrypt-worker/util/audioType.ts';
-const TEST_FILE_HEADER_LEN = 4 * 1024 * 1024;
 
 class DecryptCommandHandler {
-  private label: string;
+  private readonly label: string;
 
   constructor(
     label: string,
-    private parakeet: Parakeet,
+    private buffer: Uint8Array,
-    private buffer: ArrayBuffer,
     private options: DecryptCommandOptions,
   ) {
     this.label = `DecryptCommandHandler(${label})`;
@@ -26,82 +23,68 @@ class DecryptCommandHandler {
     return timedLogger(`${this.label}: ${label}`, fn);
   }
 
-  async decrypt(factories: CryptoFactory[]) {
+  async decrypt(decipherFactories: DecipherFactory[]) {
-    for (const factory of factories) {
+    const errors: string[] = [];
-      const decryptor = factory();
+    for (const factory of decipherFactories) {
+      const decipher = factory();
 
-      try {
+      const [result, error] = await go(this.tryDecryptWith(decipher));
-        const result = await this.tryDecryptFile(decryptor);
+      if (!error) {
-        if (result === null) {
+        if (result) {
-          continue;
+          return result;
-        }
-        return result;
-      } catch (error) {
-        if (error instanceof UnsupportedSourceFile) {
-          console.debug('WARN: decryptor does not recognize source file, wrong crypto?', error);
-        } else {
-          console.error('decrypt failed with unknown error: ', error);
         }
+        errors.push(`${decipher.cipherName}: no response`);
+        continue; // not supported
+      }
+
+      const errMsg = error.message;
+      if (errMsg) {
+        errors.push(`${decipher.cipherName}: ${errMsg}`);
+      }
+      if (error instanceof UnsupportedSourceFile) {
+        console.debug('[%s] Not this decipher:', decipher.cipherName, error);
+      } else {
+        console.error('decrypt failed with unknown error: ', error);
       }
     }
 
-    throw new UnsupportedSourceFile('could not decrypt file: no working decryptor found');
+    throw new UnsupportedSourceFile(errors.join('\n'));
   }
 
-  async tryDecryptFile(crypto: CryptoBase) {
+  async tryDecryptWith(decipher: DecipherInstance) {
-    if (crypto.checkBySignature && !(await crypto.checkBySignature(this.buffer, this.options))) {
+    const result = await this.log(`decrypt ${decipher.cipherName}`, async () =>
-      return null;
+      decipher.decrypt(this.buffer, this.options),
+    );
+    switch (result.status) {
+      case Status.NOT_THIS_CIPHER:
+        return null;
+      case Status.FAILED:
+        throw new Error(`failed: ${result.message}`);
+      default:
+        break;
     }
 
-    if (crypto.checkByDecryptHeader && !(await this.acceptByDecryptFileHeader(crypto))) {
-      return null;
-    }
-
-    const decrypted = await this.log(`decrypt (${crypto.cryptoName})`, () => crypto.decrypt(this.buffer, this.options));
-
     // Check if we had a successful decryption
-    let audioExt = crypto.overrideExtension ?? (await this.detectAudioExtension(decrypted));
+    let audioExt = result.overrideExtension || (await detectAudioExtension(result.data));
-    if (crypto.checkByDecryptHeader && audioExt === 'bin') {
+    if (!result.overrideExtension && audioExt === 'bin') {
-      return null;
+      throw new UnsupportedSourceFile('unable to produce valid audio file');
     }
+
+    // Convert mp4 to m4a
     if (audioExt.toLowerCase() === 'mp4') {
       audioExt = 'm4a';
     }
 
-    return { decrypted: URL.createObjectURL(toBlob(decrypted)), ext: audioExt };
+    return { decrypted: URL.createObjectURL(toBlob(result.data)), ext: audioExt };
-  }
-
-  async detectAudioExtension(data: Blob | ArrayBuffer): Promise<string> {
-    return this.log(`detect-audio-ext`, async () => {
-      const header = await toArrayBuffer(data.slice(0, TEST_FILE_HEADER_LEN));
-      return this.parakeet.detectAudioExtension(header);
-    });
-  }
-
-  async acceptByDecryptFileHeader(crypto: CryptoBase): Promise<boolean> {
-    // File too small, ignore.
-    if (this.buffer.byteLength <= TEST_FILE_HEADER_LEN) {
-      return true;
-    }
-
-    // Check by decrypt max first 8MiB
-    const decryptedBuffer = await this.log(`${crypto.cryptoName}/decrypt-header-test`, async () =>
-      toArrayBuffer(await crypto.decrypt(this.buffer.slice(0, TEST_FILE_HEADER_LEN), this.options)),
-    );
-
-    return this.parakeet.detectAudioExtension(decryptedBuffer) !== 'bin';
   }
 }
 
 export const workerDecryptHandler = async ({ id, blobURI, options }: DecryptCommandPayload) => {
+  await umCryptoReady;
   const label = `decrypt(${id})`;
   return withTimeGroupedLogs(label, async () => {
-    await umCryptoReady;
+    const buffer = await fetch(blobURI).then((r) => r.arrayBuffer());
-    const parakeet = await timedLogger(`${label}/init`, fetchParakeet);
+    const handler = new DecryptCommandHandler(id, new Uint8Array(buffer), options);
-    const blob = await timedLogger(`${label}/fetch-src`, async () => fetch(blobURI).then((r) => r.blob()));
-    const buffer = await timedLogger(`${label}/read-src`, async () => blob.arrayBuffer());
-
-    const handler = new DecryptCommandHandler(id, parakeet, buffer, options);
     return handler.decrypt(allCryptoFactories);
   });
 };

src/features/file-listing/FileError.tsx

@@ -1,4 +1,4 @@
-import { chakra, Box, Button, Collapse, Text, useDisclosure } from '@chakra-ui/react';
+import { Box, Button, chakra, Collapse, Text, useDisclosure } from '@chakra-ui/react';
 import { DecryptErrorType } from '~/decrypt-worker/util/DecryptError';
 
 export interface FileErrorProps {
@@ -18,11 +18,12 @@ export function FileError({ error, code }: FileErrorProps) {
     <Box>
       <Text>
         <chakra.span>
-          解密错误：<chakra.span color="red.700">{errorSummary}</chakra.span>
+          解密错误：
+          <chakra.span color="red.700">{errorSummary}</chakra.span>
         </chakra.span>
         {error && (
           <Button ml="2" onClick={onToggle} type="button">
-            详细
+            诊断信息
           </Button>
         )}
       </Text>

src/util/go.ts

@@ -0,0 +1,7 @@
+export async function go<T = unknown, E = Error>(promise: Promise<T>): Promise<[T, null] | [null, E]> {
+  try {
+    return [await promise, null];
+  } catch (error: unknown) {
+    return [null, error as E];
+  }
+}